JP2020079603A - Seismic isolation joint - Google Patents

Abstract

To provide a seismic isolation joint capable of exhibiting heat insulation performance sufficiently, and capable of improving a product life significantly.SOLUTION: A seismic isolation joint 1 connects pipes P1 and P2 arranged in a building B having a seismic isolation structure, and comprises a metal inside bellows 2 provided at both ends with joint flanges 4a, 4b respectively joined to the pipes P1, P2, and a non-metal outside bellows 3 provided on the outer peripheral part of the inside bellows 2 and holding a heat insulating material K.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a seismic isolation joint that connects pipes arranged in a building having a seismic isolation structure.

  A seismic isolation joint that connects pipes that are placed in a building having a conventional seismic isolation structure is connected to, for example, an emergency power generation facility (turbine, diesel engine, etc.) installed in the basement of a high-rise building, and has a high temperature exhaust gas. The lower pipe through which the gas flows and the upper pipe that is connected to the chimney and the flue (wind duct, duct) and discharges high-temperature exhaust gas to the external space are perpendicular to the axis due to the earthquake (direction orthogonal to the axial direction). ) Is connected while absorbing the displacement. Such seismic isolation joints have conventionally been constituted by either metal bellows (Patent Document 1 below) or non-metal bellows.

JP, 2000-170363, A

  When a metal bellows is used as the seismic isolation joint, it has sufficient airtightness and heat resistance in a high temperature range of fluid temperature of 500°C or more, and secures a sufficient displacement area in the axial direction. be able to. However, there is a problem that a high temperature area such as high temperature exhaust gas flowing in the inner space of the metal bellows is transferred to the metal bellows and is released to the outer space as high-temperature radiant heat (radiant heat). There was a problem that could not be maintained.

  On the other hand, when the seismic isolation joint is composed of non-metallic bellows, it is possible to secure a sufficient displacement area in the direction perpendicular to the axis, and the non-metallic bellows also serves as a heat insulating layer. It is possible to maintain excellent heat insulation performance. However, since the non-metal bellows is directly exposed to the flow velocity fluid pressure of a fluid such as exhaust gas flowing through the internal space, there is a problem that the strength is weak and the durability is poor and the product life is shortened.

  Then, in view of the above-mentioned problem, the present invention has an object to provide a seismic isolation joint that can sufficiently exhibit the heat insulating performance and can significantly improve the product life.

The seismic isolation joint 1 according to the invention of claim 1 connects pipes P1 and P2 arranged in a building B having a seismic isolation structure, if the means for achieving the above object is indicated by the reference numerals in the drawings. Is something that
A metal inner bellows 2 having flanges 4a and 4b for joining, which are joined to the pipes P1 and P2, respectively, at both ends thereof;
And a non-metal outer bellows 3 which is provided on the outer peripheral portion of the inner bellows 2 and holds a heat insulating material K.

The invention of claim 2 provides the seismic isolation joint 1 according to claim 1, wherein the outer bellows 3 is
An inner cloth 3a provided on the inner peripheral side and made of a heat resistant cloth,
An outer cloth 3b provided on the outer peripheral side and made of a heat resistant cloth,
It is characterized in that it is provided between the inner cloth 3a and the outer cloth 3b and has the heat insulating material K made of a heat resistant blanket.

According to a third aspect of the present invention, in the seismic isolation joint 1 according to the first or second aspect, the outer bellows 3 is
An inner ring 5a sewn on the inner surface of the inner cloth 3a,
An outer ring 5b sewn to the outer surface of the outer cloth 3b is further included.

The invention of claim 4 is the seismic isolation joint 1 according to any one of claims 1 to 3, wherein the inner cloth 3a is
A first inner cloth 3a1 provided on the inner peripheral side and to which the inner ring 5a is sewn;
A second inner cloth 3a2 provided between the heat insulating material K and the first inner cloth 3a1;
The outer cloth 3b is
A first outer cross 3b1 provided on the outer peripheral side and to which the outer ring 5b is sewn;
It is characterized by further comprising a second outer cloth 3b2 provided between the first outer cloth 3b1 and the heat insulating material K.

The invention of claim 5 is the seismic isolation joint 1 according to any one of claims 1 to 4,
The outer bellows 3 is
Corresponding to the outer ring 5b, a heat-resistant tape 3c for adhering the outer peripheral surface of the second outer cloth 3b2 in a compressed state in the thickness direction to form a concave step portion 3f on the outer peripheral surface of the heat insulating material K, It is characterized by further having.

The invention of claim 6 is the seismic isolation joint 1 according to any one of claims 2 to 5,
The heat insulating material K includes a first heat insulating layer K1 facing the inner cloth 3a and a second heat insulating layer K2 facing the outer cloth 3b.

The invention of claim 7 is the seismic isolation joint 1 according to any one of claims 1 to 6, wherein the inner bellows 2 is
A cylindrical intermediate pipe 2a provided at an axially intermediate portion,
It has a bellows-shaped one end side bellows 2b integrally formed on one end side of the intermediate pipe 2a, and a bellows-shaped other end side bellows 2c integrally formed on the other end side of the intermediate pipe 2a. Is characterized by.

The invention of claim 8 is the seismic isolation joint 1 according to claim 7, wherein the inner bellows 2 is
The base end portion 6a1 is fixed to the one end side bellows 2b, the free end portion 6a2 extends to the outer peripheral side of the outer bellows 3 along one end portion of the outer bellows 3, and the free end portion 6a2 of the outer bellows 3 is formed. One end side flange 6a fixed to one end,
A base end portion 6c1 thereof is fixed to the intermediate pipe 2a, and a free end portion 6c2 of the intermediate pipe 2a penetrates substantially the middle portion in the longitudinal direction of the outer bellows 3 to extend to the outer peripheral side of the outer bellows 3, and the free end portion 6c2 thereof is the outer side. An intermediate flange 6c fixed to a substantially intermediate portion in the longitudinal direction of the bellows 3,
A base end portion 6b1 thereof is fixed to the other end side bellows 2c, a free end portion 6b2 thereof extends along the other end portion of the outer bellows 3 to the outer peripheral side of the outer bellows 3, and the free end portion 6b2 thereof is the outer bellows. The other end side flange 6b fixed to the other end of 3,
A spring 7, which is interposed between the one end side flange 6a and the intermediate flange 6c with a biasing force and supports the intermediate flange 6c, is further provided.

According to a ninth aspect of the invention, in the seismic isolation joint 1 according to the eighth aspect,
The length from the one end of the outer bellows 3 to the substantially middle portion in the longitudinal direction is defined as the one end side outer bellows member 3A, and the length from the other end of the outer bellows 3 to the substantially middle portion in the longitudinal direction is outside the other end side Without the bellows member 3B, the one end side outer bellows member 3A and the other end side outer bellows member B are made to face each other at substantially intermediate portions in the longitudinal direction, and the intermediate flange 6c is sandwiched between the facing surfaces, and one end side outer side The outer bellows 3 is formed by integrally fixing the bellows member 3A, the intermediate flange 6c, and the other end side outer bellows member 3B.

  The effects of the present invention will be described below with reference numerals in the drawings. The seismic isolation joint 1 according to the invention of claim 1 comprises an inner bellows 2 made of metal, and a non-metal outer bellows 3 provided on the outer peripheral portion of the inner bellows 2 and holding a heat insulating material K. That is, since the high temperature fluid such as exhaust gas flowing in the internal space A2 is directly received by the metal inner bellows 2 having excellent airtightness and heat resistance, the life of the product is not reduced. Further, since the outer bellows 3 is provided on the outer peripheral side of the inner bellows 2 via the air gap A1, the axial deviation of the inner bellows 2 and the outer bellows 3 during the expansion and contraction operation is absorbed by the air gap A1, and the expansion and contraction action thereof. Can be maintained well.

  Then, the heat insulating material K is directly exposed to the inner peripheral portion of the non-metal outer bellows 3 held by the high pressure and high speed fluid such as high pressure and high speed exhaust gas flowing in the inner space A2 of the metal inner bellows 2. Since the non-metallic outer bellows 3 do not deteriorate the wind pressure wind speed durability and strength, the heat insulating material K can maintain sufficient heat insulating performance, and as a result, the product life is significantly improved. Came to be able to.

  According to the invention of claim 2, the outer bellows 3 is provided between the inner cloth 3a made of a heat resistant cloth, the outer cloth 3b made of a heat resistant cloth, the inner cloth 3a and the outer cloth 3b, and made of a heat resistant blanket. Since the heat insulating material K is included, that is, the heat insulating material K is wrapped with the inner cloth 3a and the outer cloth 3b made of the heat resistant cloth, the heat insulating material K made of the heat resistant blanket that is a cotton-like material is used. , The thickness of the heat insulating material is not thinned or interrupted, and the shape of the heat insulating layer can be reliably maintained in the shape-retaining state, and the strength and durability of the non-metal outer bellows 3 can be improved. It can be maintained for a long time.

  According to the invention of claim 3, the outer bellows 3 further includes an inner ring 5a sewn to the inner surface of the inner cloth 3a and an outer ring 5b sewn to the outer surface of the outer cloth 3b. By having it, it can be controlled by the inner and outer rings 5a and 5b, and the shape-retaining state can be reliably retained, and the strength and durability of the non-metal outer bellows 3 can be further improved. The product life can be further improved significantly.

  According to the invention of claim 4, the inner cloth 3a has the first inner cloth 3a1 and the second inner cloth 3a2 to which the inner ring 5a is sewn, and the outer cloth 3b is the outer ring 5b. The inner ring 5a may be sewn to the second inner cloth 3a2 of the inner cloth 3a because the first outer cloth 3b1 and the second outer cloth 3b2 are sewn together. Since the outer ring 5b is not sewn to the second outer cloth 3b2 of the outer cloth 3b, the heat resistant blanket is formed by the second inner cloth 3a2 of the inner cloth 3a and the second outer cloth 3b2 of the outer cloth 3b. The heat insulating material K made of can be maintained in a shape-retaining state so that its heat insulating layer is uniform, and the strength and durability of the non-metal outer bellows 3 can be maintained for a long period of time.

  According to the invention of claim 5, the outer bellows 3 is pressure-bonded to the outer ring 5b such that the outer peripheral surface of the second outer cross 3b2 is compressed in the thickness direction. Since the heat insulating tape 3c having the concave step portion 3f is formed on the outer peripheral surface of the heat insulating material K, the heat insulating material K sandwiched between the inner cloth 3a and the outer cloth 3b of the outer bellows 3 has the inner ring 5 Due to the cooperation of the concave step portion 3e formed on the inner peripheral surface side of the heat insulating material K and the concave step portion 3f formed on the outer peripheral surface side of the heat insulating material K by the heat-resistant tape 3c, the heat insulating material K is formed inside and outside. There is no deviation in the longitudinal direction inside the cloths 3a and 3b, and it is possible to maintain a heat insulating layer having a desired thickness and exhibit a good heat insulating effect.

  According to the invention of claim 6, the heat insulating material is composed of the first heat insulating layer K1 facing the inner cloth 3a and the second heat insulating layer K2 facing the outer cloth 3b. Even if the displacement amounts of the expansion and contraction displacement on the side of the cloth 3a and the expansion and contraction displacement on the side of the outer cloth 3b are slightly different, the first and second heat insulation layers K1 and K2 can be comfortably attached to the inner and outer cloths 3a and 3b, respectively. Following this, the shape-retaining state can be reliably maintained and a good heat insulating effect can be exhibited.

  According to the invention of claim 7, the inner bellows 2 has the cylindrical intermediate pipe 2a, and the bellows-shaped one end side bellows 2b and the other end side bellows 2c. Nevertheless, due to the expansion and contraction action of the bellows-like bellows 2b and 2c on both ends, the expansion and contraction of the inner bellows 2 can be appropriately obtained in the axial direction and the perpendicular direction, and it is relatively inexpensive. Can be manufactured.

  According to the invention of claim 8, the base end portion 6a1 is fixed to the one end side bellows 2b, and the free end portion 6a2 extends to the outer peripheral side of the outer bellows 3 along the one end portion of the outer bellows 3, The free end 6a2 is fixed to one end of the outer bellows 3, and the base end 6c1 is fixed to the intermediate pipe 2a, and the free end 6c2 is substantially the middle of the outer bellows 3 in the longitudinal direction. An intermediate flange 6c extending through the outer peripheral side of the outer bellows 3 and having a free end portion 6c2 fixed to a substantially middle portion in the longitudinal direction of the outer bellows 3, and a base end portion 6b1 of the other end side bellows 2c. And the free end 6b2 extends along the other end of the outer bellows 3 to the outer peripheral side of the outer bellows 3, and the free end 6b2 is fixed to the other end of the outer bellows 3 at the other end. The outer bellows 3 is supported on the inner bellows 2 by the one end side flange 6 and the other end side flange 6b, and the substantially middle portion in the longitudinal direction by the intermediate flange 6c, since the outer bellows 3 is provided with the flange 6b. Therefore, the outer bellows 3 can follow the inner bellows 2 and perform a favorable expansion/contraction action. In particular, since the substantially central portion in the longitudinal direction of the outer bellows 3 is supported by the annular intermediate flange 6c, even if the outer bellows 3 has a long dimension, the outer bellows 3 can be flexibly deformed inward and outward due to its own weight or the like. Absent.

  Furthermore, according to the present invention, since the spring 7 is interposed between the one end side flange 6a and the intermediate flange 6c with a biasing force and supports the intermediate flange 6c, the longitudinal length of the outer bellows 3 is increased. The facing flange A1 between the inner bellows 2 and the outer bellows 3 is maintained by the intermediate flange 6 supporting substantially the center in the direction, and the facing bellows A1 is axially sagged or flexed due to the weight of the outer bellows 3 or the like. It does not reduce the function as a heat insulating air layer or a space for axial displacement in a narrowed state.

  According to the invention of claim 9, the length from the one end portion of the outer bellows 3 to the substantially middle portion in the longitudinal direction is the one end side outer bellows member 3A, and from the other end portion of the outer bellows 3 to the substantially middle portion in the longitudinal direction. Of the other end side outer bellows member 3B, the one end side outer bellows member 3A and the other end side outer bellows member B are made to face each other at substantially intermediate portions in the longitudinal direction, and the circle is provided between the facing surfaces. The one end side outer bellows member 3A, the one end side outer bellows member 3A, the middle flange 6c, and the other end side outer bellows member 3B are integrally fixed together to form the outer bellows 3. 3A and the other end side outer bellows member 3B are separately manufactured in parallel, and the outer bellows 3 can be formed by integrally fixing both of them and the intermediate flange 6c. The intermediate flange 6c that supports the intermediate portion can be manufactured quickly and easily.

It is a half-cut sectional view of the seismic isolation joint which concerns on one Embodiment of this invention. It is an expanded sectional view which shows one end (upper end) of the seismic isolation joint which concerns on the same embodiment. It is an expanded sectional view which shows the longitudinal direction substantially center part of the seismic isolation joint which concerns on the same embodiment. It is an expanded sectional view which shows the other end part (lower end part) of the seismic isolation joint which concerns on the same embodiment. It is sectional drawing which shows typically the laminated structure of the outer side bellows of the base isolation joint which concerns on the same embodiment. The state which connects the seismic isolation joint which concerns on the embodiment to the piping arrange|positioned at the building which has a seismic isolation structure is illustrated, (a) is a side view which shows typically the whole building which has a seismic isolation structure, (B) is a side view which shows a seismic isolation joint typically. The seismic isolation joint according to the embodiment is connected to a pipe arranged in a building having a seismic isolation structure, and the building having the seismic isolation structure and the seismic isolation joint are displaced in the direction perpendicular to the axis by an earthquake. ) Is a side view schematically showing the whole building having a seismic isolation structure, and (b) is a side view schematically showing the seismic isolation joint.

  An embodiment of the seismic isolation joint according to the present invention will be specifically described below with reference to the drawings.

  As shown in FIG. 6, in the seismic isolation coupling 1 according to the present embodiment, for example, a seismic isolation layer B2 (seismic isolation floor) in which a plurality of seismic isolation devices B1 (dampers, isolators, etc.) are arranged is provided underground. The pipes P1 and P2 arranged in a building B such as a high-rise building having a seismic isolation structure are connected to an emergency power generation facility D (turbine, diesel engine, etc.) installed in the basement of the building B. In addition to being connected to the lower pipe P1 in which the exhaust gas of high temperature flows and the longitudinal direction (vertical direction) of the chimney C and the flue C1 (wind conduit, duct), the axial direction ( As shown in FIG. 6, the upper pipe P2 that extends vertically and discharges high-temperature exhaust gas to the external space is displaced in the vertical direction (horizontal direction orthogonal to the axial direction) due to an earthquake (FIG. 7). Then, the connection is made while absorbing the displacement in the right direction). The seismic isolation joint 1 of the present embodiment is capable of circulating high-temperature exhaust gas having a maximum heat resistant temperature of 650 degrees, an axial length (height) of 3000 mm, and a vertical direction. The length (diameter) is 2400 mm, and the displacement area in the direction perpendicular to the axis due to the earthquake is 600 mm.

  As shown in FIG. 1, a seismic isolation joint 1 connects pipes P1 and P2 arranged in a building having a seismic isolation structure, and joint flanges 4a and 4b joined to the pipes P1 and P2, respectively. Is provided with a metal inner bellows 2 provided at both ends via a joining end tube 11, and a non-metal outer bellows 3 provided on an outer peripheral portion of the inner bellows 2 and holding a heat insulating material K. ing.

In addition, as shown in FIG. 6 or 7, when the seismic isolation joint 1 is installed vertically between the upper pipe P2 and the lower pipe P1, the left side of FIG. Corresponds to the upper side shown in FIG. 6 or 7, and the right side when viewed from the front of FIG. 1 corresponds to the lower side shown in FIG. 6 or 7.
1

  As shown in FIG. 1, the inner bellows 2 has its left end in the figure fixed to an upper pipe P2 connected to a chimney C and a flue C1 (see FIG. 6 or 7), and its right end in the figure generates electricity. A metal bellows which is fixed to the lower pipe P1 connected to the facility D and through which a high-temperature high-speed pressure fluid such as a high-temperature exhaust gas flows in the internal space A2. In the present embodiment, for example, a SUS316L or the like is used. It is integrally formed by pressing austenitic stainless steel. The thickness of the inner bellows 2 is preferably in the range of 0.4 mm or more and 3 mm or less, and is 2 mm in the present embodiment. The inner bellows 2 includes a cylindrical intermediate pipe 2a provided at an intermediate portion in the axial direction, a bellows-like one end side bellows 2b provided at one end of the intermediate pipe 2a, and a bellows provided at the other end of the intermediate pipe 2a. And the other end side bellows 2c. The intermediate pipe 2a is a cylindrical member that extends straight in the axial direction (vertical direction), and is a portion that does not deform in the axial direction and the axial direction (horizontal direction). The one end side bellows 2b and the other end side bellows 2c are bellows-like portions integrally formed on one end portion and the other end portion of the intermediate pipe 2a, and are portions that absorb axial and perpendicular axial displacement due to an earthquake. is there.

  The intermediate pipe 2a is 30% or more and 40% or less of the axial length of the inner bellows 2, and the one end side and the other end side bellows 2b and 2c are 30% or more and 40% or less of the axial length of the inner bellows 2, respectively. In the present embodiment, the axial length of the intermediate pipe 2a and the bellows 2b, 2c on the one end side and the other end side is approximately 30% of the axial length of the inner bellows 2, respectively, which are substantially the same. It consists of an axial length.

  According to the present embodiment, the inner bellows 2 has the cylindrical intermediate pipe 2a and the bellows-shaped one end side bellows 2b and the other end side bellows 2c. Despite the existence of the above, the expansion and contraction action of the bellows-like bellows 2b, 2c on both end sides can result in the expansion and contraction of the inner bellows 2 in the axial direction and the perpendicular direction. Can be manufactured inexpensively.

  As shown in FIG. 1, the outer bellows 3 is a non-metal bellows that is provided on the outer peripheral portion of the inner bellows 2 via a gap A1 and holds a heat insulating material K. The void A1 has a heat insulating function and an effect of absorbing a deviation in the direction perpendicular to the axis. As shown in FIG. 5, the outer bellows 3 are provided so as to face the space A1 on the inner peripheral side, and the inner cloth 3a is made of a heat-resistant cloth (woven cloth) such as a ceramic cloth, which is a non-metal material, and the outer peripheral side. An outer cloth 3b made of a heat resistant cloth (woven cloth) which is a non-metal material such as an aluminum glass cloth or a ceramic cloth, which is provided so as to face the outer space A3 of the glass cloth, and an aluminum foil is laminated on the surface of the glass cloth; A heat insulating material K (fiber heat insulating material) which is provided between the cloth 3a and the outer cloth 3b and includes a heat-resistant blanket such as a ceramic blanket which is a non-metal material in which fibers such as ceramic fibers are made into a blanket shape (cotton shape); ,have. The heat insulating material K may be made of an integrated heat insulating layer, but preferably, as shown in the figure, the first heat insulating layer K1 arranged facing the inner peripheral side inner cloth 3a and the outer peripheral side outer cloth 3b. And a second heat insulating layer K2 that is disposed so as to face. Further, the inner cloth 3a includes a first inner cloth 3a1 provided so as to face the space A1 on the inner peripheral side, and a second inner cloth 3a2 provided between the first heat insulating layer K1 and the first inner cloth 3a1. ,have. The outer cloth 3b includes a first outer cloth 3b1 provided so as to face the outer space A3 on the outer peripheral side, and a second outer cloth 3b2 provided between the first outer cloth 3b1 and the second heat insulating layer K2. ,have.

  According to the present embodiment, the outer bellows 3 is provided between the inner cloth 3a made of a heat resistant cloth, the outer cloth 3b made of a heat resistant cloth, and the inner cloth 3a and the outer cloth 3b, and made of a heat insulating material made of a heat resistant blanket. K, that is, since the heat insulating material K is wrapped by the inner cloth 3a and the outer cloth 3b made of heat resistant cloth, the thickness of the heat insulating material is likely to deviate and the cotton-like heat resistant The heat insulating material K made of a blanket can be reliably maintained in the shape-retaining state without losing its shape, and the strength and durability of the non-metal outer bellows 3 can be maintained for a long period of time.

  As shown in FIG. 1, the outer bellows 3 is sewn on the inner side surface of the inner cloth 3a, and the plurality of inner rings 5a (six in the present embodiment) are equally distributed in the axial direction and the outer cloth 3b. A plurality of (in this embodiment, eight) outer rings 5b that are sewn to the outer surface of the inner ring 5a and are equally arranged alternately with the inner rings 5a in the axial direction so as to avoid the plurality of inner rings 5a. ing. Specifically, as shown in FIGS. 2 to 4, the inner ring 5a is an annular member made of metal such as stainless steel such as SUS304, which is mounted from the inner peripheral side of the first inner cloth 3a1, and has an outer periphery. The entire portion is covered with the inner peripheral surface of the first inner cloth 3a1 and fixed by sewing at the position of the seam S1. In the outer bellows 3, the inner ring 5a presses the second inner cloth 3a2 and the first heat insulating material (layer) K1 toward the outer peripheral side, and the concave step portions 3e having the inner peripheral surface recessed are formed at appropriate intervals in the axial direction. ing. The outer ring 5b is an annular member made of metal such as stainless steel such as SUS304 mounted from the inner peripheral side of the first outer cross 3b1, and the entire outer peripheral portion covers the inner peripheral surface of the first outer cross 3b1. In this state, the sewing is fixed at the position of the seam S2. In the outer bellows 3, the second outer cloth 3b2 and the second heat insulating material (layer) K2 are pressed to the inner peripheral side by the outer ring 5b and the heat-resistant tape 3c described later, and the outer peripheral surface is dented as shown in FIG. The recessed step portions 3f are equally arranged in the axial direction so as to avoid the plurality of inner peripheral side recessed step portions 3e in the axial direction. As a result, the outer bellows 3 is formed in a bellows shape in which the concave step portions 3f having a concave outer peripheral surface and the concave step portions 3e having an inner peripheral surface are alternately arranged alternately in the axial direction.

  According to the present embodiment, the outer bellows 3 includes a plurality of inner rings 5a that are equally arranged in the axial direction and a plurality of outer rings 5b that are alternately arranged in the axial direction so as to avoid the plurality of inner rings 5a. , That is, since the inner cloth 3a and the outer cloth 3b made of heat-resistant cloth can be tightly wrapped around the heat-insulating material K made of heat-resistant blanket, the strength and durability of the outer bellows 3 made of non-metallic cloth can be improved. Therefore, it is possible to maintain and improve the property, and thus, the product life can be significantly improved.

  As shown in FIGS. 2 to 4, the outer bellows 3 corresponds to the plurality of outer rings 5b to form the concave step portion 3f on the outer peripheral surface of the outer cloth 3b and the heat insulating material K as described above. 2 has a plurality of heat resistant tapes 3c attached to the outer peripheral surface of the outer cloth 3b2. The heat-resistant tape 3c is made of an aluminum glass cloth tape on which an adhesive is laminated on the back surface of the aluminum glass cloth, and a ring-shaped aluminum glass tape having a smaller diameter than the outer diameter of the outer bellows 3 is used to compress the outer diameter of the outer bellows 3. Then, the concave step portion 3f may be formed on the outer peripheral surface of the outer cloth 3b and the heat insulating material K by fitting and sticking to the outer peripheral surface of the second outer cloth 3b2 in a pressure manner or in the form of a strip. The aluminum glass cloth tape is pressed against the outer peripheral surface of the second outer cloth 3b2 so as to be adhered while forming a recess, thereby forming the concave step portion 3f on the outer peripheral surfaces of the outer cloth 3b and the heat insulating material K. You can Thus, the outer ring 5b, particularly the heat insulating tape 3c, forms the concave step portion 3f on the outer peripheral surfaces of the outer cloth 3b and the heat insulating material K, and maintains the concave step shape.

  Then, the heat insulating material K is formed into a biconcave step by the concave step portion 3f formed by the outer ring 5b and the ring-shaped heat-resistant tape 3c and the concave step portion 3e formed on the inner peripheral surface side of the heat insulating material K by the inner ring 5a. Due to the restricting action of the portions 3f and 3e, the thickness deviation of the heat insulating material K in the axial direction, that is, the longitudinal direction of the outer bellows 3 can be prevented, and the shape retaining force thereof can be firmly maintained, and the outer peripheral surface side The concave step portion 3f formed on the inner peripheral surface side and the concave step portion 3e formed on the inner peripheral surface side form a bellows shape, and expansion and contraction displacement in the longitudinal direction is allowed.

  According to this embodiment, the inner cloth 3a includes the first inner cloth 3a1 to which the inner ring 5a is sewn and the second inner cloth 3a2, and the outer cloth 3b and the outer ring 5b are sewn. Since it has the first outer cross 3b1 and the second outer cross 3b2 to be worn, that is, the inner ring 5a is not sewn on the second inner cross 3a2 of the inner cross 3a, Since the outer ring 5b is not sewn to the second outer cloth 3b2 of the outer cloth 3b, the shape retention force is increased by the second inner cloth 3a2 of the inner cloth 3a and the second outer cloth 3b2 of the outer cloth 3b. It is possible to maintain the shape of the heat insulating material K made of a heat-resistant blanket that is weak and easily disperse without a gap, and to maintain a uniform heat insulating layer.

  As shown in FIG. 1, the inner bellows 2 has an intermediate pipe 2a arranged in the central portion of the drawing, and one end side bellows (upper end side bellows when vertically installed) 2b is arranged on the left end side thereof. The other end side bellows (lower end side bellows when installed in the vertical direction) 2c is arranged on the right end side in the figure, and as shown in FIG. The base end portion 6a1 is fixed to the outer end of the outer bellows 3 along the one end portion of the outer bellows 3 and the free end portion 6a2 extends beyond the outer bellows 3 toward the outer end portion. As shown in FIG. 4, the base end 6b1 is fixed to the other end of the lower bellows 2c, and the free end 6b2 extends outward along the other end of the outer bellows 3 as shown in FIG. Also, a disk-shaped other end side flange (lower end side flange) 6b that extends to the outer peripheral side beyond the outer bellows 3 and a base end portion 6c1 thereof has an outer peripheral surface of the central portion of the intermediate pipe 2a as shown in FIG. A disk-shaped intermediate flange 6c, which is fixed to the outer end of the outer bellows 3 through the substantially central portion in the longitudinal direction of the outer bellows 3 and extends to the outer peripheral side beyond the outer bellows 3, and an upper flange 6a. It is provided with an inner bellows 2 and an outer bellows 3 supported by an urging force between the intermediate flange 6c and the intermediate flange 6c.

As shown in FIG. 2, a disc-shaped pressing flange 21a is superposed on the vertical portion 20a2 of the mounting bracket 20a having an L-shaped cross section, and the disc-shaped one end side flange (upper side flange) 6a and the mounting bracket 20a are perpendicular to each other. The portion 20a2 and the pressing flange 21a are integrally fastened and fixed by a bolt 22a and a nut 23a. Further, a mounting piece 21a1 to which a mounting metal fitting 21a2 such as a shackle is detachably mounted is projectingly formed on the pressing flange 21a. It is detachably locked. The pressing flange 21a may have a large amount of protrusion toward the outer peripheral side, as shown by the broken line, and the mounting piece 21a1, the mounting bracket 21a2, and the spring 7 may be arranged at the protruding end portion.

  Thus, the inner bellows 2 has an annular shape in which the base end portion 6a1 is fixed to the one end side bellows 2b and the free end portion 6a2 extends to the outer peripheral side of the outer bellows 3 and is fixed to one end portion thereof. A base end portion 6c1 is fixed to the one end side flange 6a and the outer peripheral portion of the intermediate pipe 2a, and a free end portion 6c2 thereof extends to the outer peripheral side of the outer bellows 3, and the outer bellows 3 is provided with a substantially central portion in the longitudinal direction thereof. The annular intermediate flange 6c that is supported by the intermediate flange 6c and the one end side flange 6a and the intermediate flange 6c are interposed with a biasing force to support the intermediate flange 6c, and the inner bellows 2 and the outer bellows 3 are thereby supported. Since the supporting springs 7 are provided, the inner and outer bellows 2 and 3, particularly the outer bellows 3, sag in the axial direction due to the weight thereof, or the facing gap A1 between the inner bellows 2 and the outer bellows 3 is narrowed to form an adiabatic air layer or The function of the space for axial displacement is not diminished.

  Further, as shown in FIG. 2, one end side bellows (upper end side bellows) 2b of the inner bellows 2 is fixed to one end portion of a cylindrical joining end tube 11 by welding, and at the same time, the joining end tube 11 A disc-shaped end pipe flange 10 is projected upward at one end portion of and is fixed by welding. A base end portion 6a1 of a disk-shaped one end side flange (upper end side flange) 6a is fastened and fixed to the end pipe flange 10 by a bolt 13 and a nut 14. Further, the horizontal portion 20a1 of the mounting bracket 20a having an L-shaped cross section is fixed to the heat insulating material K therein from one end of the outer bellows 3 by a fixing pin 3d with a clip 3d1.

  The mounting bracket 20a having an L-shaped cross section has its entire surface covered with the first inner cloth 3a1 and the second inner cloth 3a2, thereby maintaining heat insulation performance. The mounting bracket 20a having an L-shaped cross section prevents the heat insulation material K, which is likely to occur particularly on one end side of the outer bellows 3, from thinning, breaking, or deviating in any direction by the mounting bracket 20a having the L-shaped cross section. It is possible to maintain the shape-retaining state with a uniform layer thickness.

  Further, the fixing pin 3d penetrates the heat insulating material K in the thickness direction and is fixed to one end of the heat insulating material K on the mounting bracket 20a in a compressed state of the thickness of the heat insulating material K. A heat insulating material piece K3 that is superposed on the heat insulating material K of the outer bellows 3 is attached so as to cover the fixed pin 3d, and one end of the heat insulating material K and the fixed pin 3d are kept in a heat insulating state by the heat insulating material piece K3. It has a good thermal insulation effect without diminishing. Since the entire circumference of the heat insulating material piece K3 is wrapped in a bag shape by the second outer cloth 3b2 and the third outer cloth 3b3, the shape retaining force thereof can be maintained. The heat insulating material piece K3 is made of a cylindrical ceramic blanket that is mounted in a gap in the outer peripheral portion generated when the upper ends of the first heat insulating material K1 and the second heat insulating material K2 are compressed and fixed by the fixing pin 3d. ..

  As shown in FIG. 2, a plurality of trapezoidal plate-shaped ribs 30 for reinforcement which are arranged at intervals in the circumferential direction at the end pipe flange 10 are welded and fixed to the one end side flange (upper end side flange) 6a. A rectangular plate-shaped hanging fitting 31 having an insertion hole 31a for inserting a hanging string or the like is welded and fixed. The end pipe flange 10 is welded and fixed to the outer end pipe 12 of the joining end pipe 11 with the rib 30 interposed between the joining end pipe 11 and the outer end pipe 12 between the joining end pipe 11 and the outer end pipe 12. A heat insulating material K5 made of a ceramic blanket is interposed. A disc-shaped joining flange 4a is welded and fixed to the upper surface of the outer end tube 12 of the joining end tube 11. On the other hand, one end side pipe (upper side pipe) P2 arranged in the building has a cylindrical inner end pipe 41 and a cylindrical outer end pipe 42 attached to the outer peripheral portion of the inner end pipe 41. A heat insulating material K6 made of a cylindrical ceramic blanket interposed in an annular space between the inner end pipe 41 and the outer end pipe 42, and a disc-shaped joined object welded and fixed to the outer peripheral portion of the outer end pipe 42. The flange 40 for connection is provided, and the flange 40 for joining and the joining flange 4a on the seismic isolation joint 1 side are fastened and fixed by a bolt 43 and a nut 44 with a gasket 45 interposed therebetween. As a result, one end side (upper end side) of the seismic isolation joint 1 is connected and fixed to the one end side pipe (upper side pipe) P2.

  As shown in FIG. 3, a disc-shaped intermediate flange 6c is fixed to the central outer peripheral portion of the intermediate pipe 2a constituting the inner bellows 2 in the axial direction. Fixing brackets 21d1 and 21d2 are fixed to each other by welding at an opposing interval, and the lower end portion 6c1 of the intermediate flange 6c is inserted with gaskets 20d1 and 20d2 sandwiched between the opposing intervals, and is fixed by bolts 22d and nuts 23d. I am trying.

  As shown in FIG. 3, a disc-shaped intermediate flange 6c penetrates through the axially central portion of the outer bellows 3 in the axial direction, and the outer bellows 3 has one end portion with the intermediate flange 6c interposed therebetween. It is divided into a side outer bellows (upper side outer bellows) 3A and another end side outer bellows (lower side outer bellows) 3B. One end of the other end side outer bellows 3B overlaps with the intermediate flange 6c. The mounting bracket 20c2 having an L-shaped cross section is superposed, and the horizontal portion 20c21 of the mounting bracket 20c2 is fixed to the inner peripheral surface of one end of the heat insulating material K by the fixing pin 3d with the clip 3d1, and the vertical portion 20c22 of the mounting bracket 20c2 is On the other hand, the mounting flange 20c1 composed of the vertical portion 20c12 that overlaps with the intermediate flange 6c is overlapped on the right end of the one end side outer bellows (upper side outer bellows) 3A. The left and right mounting brackets 20c2 and 20c1 and the pressing plates 21c1 and 21c2 that come into contact with the rear surfaces of the mounting brackets 20c2 and 20c1, respectively, are integrally fixed by a bolt 22c and a nut 23c.

  Thus, the base end portion 6c1 is fixed to the intermediate pipe 2a of the inner bellows 2, and the free end portion 6c2 has one end side outer bellows (upper side outer bellows) 3A and the other end side outer bellows (lower side outer bellows). ) Intermediate flange 6c inserted between 3B and the opposite surface, one end side outer bellows (upper side outer bellows) 3A side mounting bracket 20c1 and the other end side outer bellows (lower side outer bellows) 3B side mounting bracket 20c2 and pressing plates 21c1 and 20c2, which are superposed on each other, are integrally fixed by a bolt 22c and a nut 23c, and one end side outer bellows (upper side outer bellows) 3A and the other end side outer bellows (lower side). The outer bellows) 3B is integrally connected, one end is connected to the one end side flange 6a, and the other end is connected to the intermediate flange 6c via the pressing plate 21c1 by the urging force of the spring 7. The inner and outer bellows 2 and 3 supported by the intermediate flange 6c sag in the axial direction or the perpendicular direction depending on the weight thereof, or the opposing gap A1 between the inner bellows 2 and the outer bellows 3 is narrowed so that the heat insulating air layer or the perpendicular direction is formed. The action as the displacement space is not diminished.

  Further, the mounting bracket 20c2 having the L-shaped cross section is covered with the first inner cloth 3a1 and the second inner cloth 3a2 on the entire surface thereof, thereby maintaining the heat insulating performance. The mounting bracket 20c2 having an L-shaped cross section prevents the thermal insulation material K, which is apt to be generated particularly on one end side of the outer bellows 3, from being thinned or interrupted, and makes the thermal insulation layer uniform in thickness. The shape retention state can be reliably retained.

  Further, the fixing pin 3d penetrates the heat insulating material K in the thickness direction and is fixed to one end of the heat insulating material K on the mounting bracket 20c2 in a compressed state of the thickness of the heat insulating material K. , A heat insulating material piece K4 which overlaps with the heat insulating material K is attached so as to cover the fixed pin 3d, and the heat insulating material piece K4 does not reduce the heat insulating state of one end of the heat insulating material K and the fixed pin 3d. It is designed to provide good heat insulation. The whole circumference of the heat insulating material piece K4 is wrapped in a bag shape by the second outer cross 3b2 and the third outer cross 3b3 to maintain its shape retention force. The heat insulation piece K4 is a cylindrical ceramic blanket that is mounted in a gap in the outer peripheral portion generated when the upper ends of the first heat insulation material K1 and the second heat insulation material K2 are compressed and fixed by the fixing pin 3d. ..

  A mounting piece 21c11 is formed on the pressing flange 21c1 so as to project therefrom, and a mounting metal piece 21c12 such as a shackle is detachably mounted on the mounting piece 21c11. The hook-shaped lower end portion 7b of the spring 7 is detachably locked to the mounting member 21c12. Note that the pressing flange 21c1 may have a large amount of protrusion toward the outer peripheral side as shown by the broken line in the figure, and the mounting piece 21c11, the mounting bracket 21c12, and the spring 7 may be arranged at the protruding end portion. Therefore, as shown by the broken line in FIG. 2, the spring 7 attached to the projecting end portion of the pressing flange 21a that largely protrudes toward the outer peripheral side has the protrusion of the pressing flange 21a that also largely protrudes toward the outer peripheral side as shown by the broken line in FIG. The spring 7 is mounted over the end portions, and by suspending the spring 7 in such a state that the spring 7 protrudes a lot toward the outdoor side, the suspension supporting force of the spring 7 on the intermediate flange 6c can be increased.

  Then, as shown in FIG. 4, an annular other end side flange 6b having a base end portion 6b1 fixed to a bellows-like other end side bellows 2c integrally formed on the other end side of the intermediate pipe 2a, The other end side mounting bracket 20b is attached to the other end of the outer bellows 3, and the other end side flange 6b and the other end side mounting bracket 20b are fixed with a bolt 22b and a nut 23b. Therefore, the other end side mounting bracket 20b of the outer bellows 3 can be easily fastened and fixed to the other end side flange 6b connected to the inner bellows 2 by the bolt 22b and the nut 23b.

  Further, as shown in FIG. 4, the other end side bellows (lower end side bellows) 2c of the inner bellows 2 is welded and fixed to one end portion of the cylindrical joining end pipe 11 and the joining end pipe 11 A disk-shaped end pipe flange 10 is projected and fixed by welding to one end of the above. A disc-shaped other end side flange (lower end side flange) 6b is fastened and fixed to the end pipe flange 10 by a bolt 13 and a nut 14.

  Further, the end pipe flange 10 is welded and fixed to the outer end pipe 12 of the joining end pipe 11 with the rib 30 sandwiched between the joining end pipe 11 and the joining end pipe 11 and the outer end pipe 12 thereof. A heat insulating material K5 made of a ceramic blanket is interposed between the two. A disc-shaped joining flange 4b is welded and fixed to the upper surface of the outer end tube 12 of the joining end tube 11. On the other hand, the other end side pipe (lower side pipe) P1 arranged in the building has a cylindrical inner end pipe 41 and a cylindrical outer end pipe 42 mounted on the outer peripheral portion of the inner end pipe 41. And a heat insulating material K6 made of a cylindrical ceramic blanket interposed in the annular space between the inner end pipe 41 and the outer end pipe 42, and a disc-like member welded and fixed to the outer peripheral portion of the outer end pipe 42. A flange 40 to be joined is provided, and the flange 40 to be joined and the joining flange 4b on the seismic isolation joint 1 side are fastened and fixed by a bolt 43 and a nut 44 with a gasket 45 interposed therebetween. As a result, the other end side (lower end side) of the seismic isolation joint 1 is connected and fixed to the other end side pipe (lower side pipe) P1.

  Thus, in installing and using the seismic isolation coupling 1 formed in this way, first, as shown in FIG. 1, first between the one end side flange (upper flange) 6a and the intermediate flange 6c, and between the intermediate flange 6c. A plurality of set bolts 32 made of a metal rod are circumferentially attached to the inner bellows 2 and the outer bellows 3 in the axial direction and the axially perpendicular direction, respectively. The state that does not expand and contract. In this state, the joint flange 40 fixed to the upper end of the lower pipe P1 connected to the power generation facility D (see FIG. 6 or 7) and the joint flange fixed to the lower end of the inner bellows 2 4b is fastened and fixed by bolts 43 and nuts 44, and the inside of the jointed flange 40 fixed to the lower end of the upper pipe P2 connected to the chimney C and the flue C1 (see FIGS. 6 and 7). The joining flange 4a fixed to the upper end of the bellows 2 is fastened and fixed by the bolt 43 and the nut 44. Then, the plurality of set bolts 32 are removed so that the inner bellows 2 and the outer bellows 3 can be expanded and contracted in the axial direction and the axially perpendicular direction. Thus, as shown in FIG. 6, both ends of the seismic isolation joint 1 are connected to the pipes P1 and P2 arranged in the building B having the seismic isolation structure and are ready for use. Therefore, when an earthquake occurs in the building B having the seismic isolation structure in which the seismic isolation joint 1 is installed, as shown in FIG. 7, the displacement in the vertical direction (horizontal direction) due to the earthquake (the right direction in FIG. 7) is performed. Displacement) can be absorbed.

  According to the present embodiment described above, the seismic isolation joint 1 is provided on the metal inner bellows 2 in which the fluid flows in the internal space A2 and on the outer peripheral portion of the inner bellows 2, and the heat insulating material K is retained. Since the outer bellows 3 made of metal is provided, that is, since the high heat fluid such as exhaust gas flowing through the inner space A2 is directly received by the inner bellows 2 made of metal having excellent airtightness and heat resistance, Does not reduce the product life. Further, since the outer bellows 3 is provided on the outer peripheral side of the inner bellows 2 via the air gap A1, the axial deviation of the inner bellows 2 and the outer bellows 3 during the expansion and contraction operation is absorbed by the air gap A1, and the expansion and contraction action thereof. Can be maintained well.

  Then, the heat insulating material K is directly exposed to the inner peripheral portion of the non-metal outer bellows 3 held by the high pressure and high speed fluid such as high pressure and high speed exhaust gas flowing in the inner space A2 of the metal inner bellows 2. Since the non-metallic outer bellows 3 do not deteriorate the wind pressure wind speed durability and strength, the heat insulating material K can maintain sufficient heat insulating performance, and as a result, the product life is significantly improved. Came to be able to.

  The shapes and the like shown in the present embodiment are merely examples, and various modifications and changes can be made within the scope of the present invention. For example, in the present embodiment, the seismic isolation joint 1 is connected to the emergency power generation facility installed in the basement of the building B, but the present invention is not limited to this. It may be connected to a boiler or the like of the incineration facility. Further, in the present embodiment, the seismic isolation joint 1 is installed so as to extend in the axially vertical direction, but the present invention is not limited to this, and for example, the building B of the building B may be connected via a hanging string inserted into the hanging fitting 31. It may be installed so as to extend laterally in the axial direction by being hooked on the ceiling.

1 Seismic isolation joint 2 Inner bellows 2a Intermediate pipe 2b One end side bellows (upper end side bellows)
2c Other end side bellows (lower end side bellows)
3 Outer bellows 3A One end side outer bellows member (upper side outer bellows member)
3B Other end side outer bellows member (lower side outer bellows member)
3a inner cloth 3a1, 3a2 first inner cloth, second inner cloth 3b outer cloth 3b1 to 3b4 first outer cloth to fourth outer cloth 3c heat resistant tape 3d fixing pins 4a, 4b joining flange 5a inner ring 5b outer ring 6a one end Side flange (upper flange)
6a1 Base end part of one end side flange 6a2 Free end part of one end side flange 6b Other end side flange (lower flange)
6b1 Base end part of the other end side flange 6b2 Free end part of the other end side flange 6c Intermediate flange 6c1 Base end part of the intermediate flange 6c2 Free end part of the intermediate flange 7 Spring P1 The other end side pipe in the building (upper side pipe)
P2 One end side piping in the building (lower side piping)
K heat insulating material K1 first heat insulating layer K2 second heat insulating layer 10 end pipe flange 11 joining end pipe 20a one end side mounting bracket with a L-shaped cross section 20c2 center portion mounting bracket 20b with a L-shaped cross section other end side mounting bracket 20c1 spring side mounting Bracket 21d1 Fixed bracket 21d2 Fixed bracket 40 Flange to be joined

Claims (9)

Connecting pipes placed in a building with a seismic isolation structure,
Metal inner bellows provided at both ends with joining flanges joined to the pipes respectively,
A non-metallic outer bellows provided on the outer peripheral portion of the inner bellows and having a heat insulating material. The outer bellows is
An inner cloth made of heat resistant cloth, provided on the inner peripheral side,
An outer cloth made of a heat resistant cloth provided on the outer peripheral side,
The seismic isolation joint according to claim 1, further comprising: the heat insulating material that is provided between the inner cloth and the outer cloth and is made of a heat-resistant blanket. The outer bellows is
An inner ring sewn to the inner surface of the inner cloth,
The seismic isolation joint according to claim 1 or 2, further comprising an outer ring sewn to an outer surface of the outer cloth. The inner cloth is
A first inner cloth provided on the inner peripheral side and to which the inner ring is sewn;
Further comprising a second inner cloth provided between the heat insulating material and the first inner cloth,
The outer cloth is
A first outer cross provided on the outer peripheral side and to which the outer ring is sewn;
The seismic isolation joint according to claim 1, further comprising a second outer cloth provided between the first outer cloth and the heat insulating material. The outer bellows is
Corresponding to the outer ring, a heat-resistant tape is further provided, which is attached to the outer peripheral surface of the second outer cloth in a compressed state in the thickness direction to form a concave step portion on the outer peripheral surface of the heat insulating material. The seismic isolation joint according to claim 1.   The seismic isolation joint according to claim 2, wherein the heat insulating material has a first heat insulating layer facing the inner cloth and a second heat insulating layer facing the outer cloth. The inner bellows is
A cylindrical intermediate pipe provided in the axially intermediate portion,
7. A bellows-shaped one end side bellows integrally formed on one end side of the intermediate pipe, and a bellows-shaped other end side bellows integrally formed on the other end side of the intermediate pipe. The seismic isolation joint according to any one of 1. The inner bellows is
One end whose base end is fixed to the one end side bellows, whose free end extends to the outer peripheral side of the outer bellows along one end of the outer bellows, and whose free end is fixed to one end of the outer bellows Side flanges,
A proximal end portion is fixed to the intermediate pipe, a free end portion thereof penetrates a substantially middle portion in the longitudinal direction of the outer bellows and extends to an outer peripheral side of the outer bellows, and a free end portion thereof is substantially middle in the longitudinal direction of the outer bellows. Intermediate flange fixed to the part,
The base end portion is fixed to the other end side bellows, the free end portion extends to the outer peripheral side of the outer bellows along the other end portion of the outer bellows, and the free end portion is fixed to the other end portion of the outer bellows. Other end side flange,
The seismic isolation joint according to claim 7, further comprising: a spring that is interposed between the one end side flange and the intermediate flange with a biasing force and supports the intermediate flange.   The length from one end of the outer bellows to the substantially middle portion in the longitudinal direction is the one end side outer bellows member, and the length from the other end of the outer bellows to the substantially middle portion in the longitudinal direction is the other end side outer bellows member. None, the one end side outer bellows member and the other end side outer bellows member face each other at substantially central portions in the longitudinal direction, and the intermediate flange is sandwiched between the facing faces, and the one end side outer bellows member, the intermediate flange, and the like. 9. The seismic isolation joint according to claim 8, wherein the outside bellows member is integrally fixed to the outside bellows member to form an outside bellows.

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