JP2001289279A - Supporting device for equipment and support structure of rotary equipment pedestal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a supporting device for equipment to be capable of providing both vibration control ability and base isolation ability during the occurrence of an earthquake when the equipment to generate vibration is installed on a skeleton and to provide the support structure of a rotary equipment frame using the support device. SOLUTION: A plurality of sets of vibration isolation members 3a and 3b formed of lamination rubber or thick lamination rubber are interposed in a vertically stacked state between the frame 1, on which the equipment to generate vibration is installed, and a skeleton 2 of a structure to support the frame 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supporting device for equipment which is suitable for interposing equipment which generates various vibrations on a frame of a structure, and a rotating equipment mount using the same. Related to the support structure.

[0002]

2. Description of the Related Art Generally, in equipment such as a turbine / generator, a rotary press, and a press, which generates various kinds of vibration, there is a possibility that the vibration generated from the equipment propagates to a structure body. Therefore, as shown in FIGS. 5 and 6,
Conventionally, when these equipments are installed on the skeleton 20 of the structure, a vibration isolating rubber 22 shown in FIG. 5 and a spring 23 shown in FIG. 6 are interposed between the gantry 21 and the skeleton 20 of the equipment. By doing so, a so-called vibration-proof foundation that elastically supports the gantry 21 is used. According to such an anti-vibration base, harmful vibration mainly generated in the vertical direction, which is generated from the equipment and transmitted to the frame, is transmitted to the anti-vibration rubber 2.
2 and the elastic force of the spring 23,
Transmission to the side can be effectively blocked.

[0003]

By the way, in the above-mentioned vibration-proof foundation, in order to effectively exhibit vibration-proof properties, an elastic member having a small natural frequency such as a vibration-proof rubber 22 or a spring 23 is interposed. Since horizontal vibration acts from the skeleton 20 side during an earthquake during the earthquake, the elastic member resonates with the vibration, and as a result, the equipment itself or a portion where the equipment and piping are connected to each other, There was a risk of causing adverse effects or damage.

[0004] On the other hand, conventionally, seismic isolation devices using laminated rubber have been known in order to protect structures and equipment from vibration generated during an earthquake. This seismic isolation device is made by alternately stacking thin steel plates and rubber in multiple layers.
It has a large horizontal displacement characteristic and reduces the influence of seismic force on structures and equipment on the seismic isolation device by absorbing the horizontal relative displacement generated during an earthquake by the elasticity of the rubber. .

However, in the above-described seismic isolation device, the natural frequency in the horizontal direction is much lower than that of the above-described anti-vibration rubber 22 and spring 23, but the upper structure is stably supported at normal times. Due to demand, it has high rigidity in the vertical direction. Therefore, if the above-mentioned seismic isolation device is directly installed in the installation part of the above-described equipment, the seismic isolation effect for the equipment can be obtained, but the originally required vibration isolation effect cannot be obtained. there were.

In order to improve this, it is conceivable to use a thick laminated rubber. However, in the case of the thick laminated rubber, compared with the vibration-proof rubber 22 and the spring 23, the vertical laminated rubber is used. It is difficult to set the natural frequency to 5 Hz or less suitable for vibration isolation, and the horizontal natural frequency is small, so that the horizontal deformation that occurs during an earthquake becomes too large. .

The present invention has been made in view of the above circumstances, and when installing equipment that generates vibration on a skeleton, it is possible to provide both vibration isolation in normal times and seismic isolation in an earthquake. Equipment supporting equipment,
It is another object of the present invention to provide a support structure for a rotating equipment stand using the same.

[0008]

According to a first aspect of the present invention, there is provided a supporting apparatus for equipment, comprising: a base on which equipment for generating vibration is installed; and a frame of a structure supporting the base. A plurality of seismic isolation members made of an elastic body are vertically interposed and interposed therebetween.

According to a second aspect of the present invention, there is provided a supporting apparatus for equipment, wherein an elastic device is provided between a base on which the equipment for generating vibration is installed and a frame of a structure supporting the base. A plurality of seismic isolation members each consisting of a body are vertically stacked and interposed, and a sliding bearing is provided between the seismic isolation members or between the uppermost or lowermost seismic isolation member and the gantry or frame. It is characterized in that a seismic isolation device is provided, and the invention according to claim 3 further includes an origin return means for returning the gantry to its original position between the gantry and the frame. It is characterized by the following.

[0010] The invention described in claim 4 is the first invention.
In the invention described in any one of (1) to (3), a restraining jig for restricting a horizontal displacement movement of the seismic isolation member is provided at a part of the seismic isolation member in the vertical direction. It is assumed that.

[0011] Next, a supporting structure for a rotating equipment stand according to the present invention according to claim 5 is a supporting structure for a supporting stand for supporting rotating equipment, the mounting deck supporting a rotating body in the mounting stand, Claim 1 between the support legs of the gantry
4. A support device in which any one of the four or a combination thereof is interposed.

The equipment according to any one of the first to fourth aspects of the present invention refers to equipment, such as electric equipment, air-conditioning / exhaust equipment, kitchen equipment, etc., in a structure, and is widely installed in the structure. It includes various devices. Further, in the invention according to any one of claims 1 to 5, as the elastic body forming the seismic isolation member, for example, a laminated rubber or a thick laminated rubber is preferable.

[0013] According to the supporting device for equipment of any one of claims 1 to 4, a plurality of sets of seismic isolation members made of an elastic body such as a laminated rubber or a thick laminated rubber are vertically stacked. As a result, the rigidity is reduced as compared with the case where these seismic isolation members are interposed between the frame and the gantry alone. Therefore, the rigidity of the elastic body, for example, when a laminated rubber or the like is used as the elastic body, the rigidity according to the number or combination of the laminated rubber and / or the thick laminated rubber is appropriately selected, and the natural vibration in the vertical direction is selected. By setting the number low, desired vibration isolation performance can be exhibited. Thus, in normal times, the above-mentioned seismic isolation member prevents the vibration generated from the equipment from propagating to the skeleton of the structure. From this viewpoint, it is preferable to use, as the seismic isolation member, an elastic body having a rigidity equal to or less than a rigidity capable of supporting the portion of the gantry by one set.

According to the first aspect of the present invention, a horizontal displacement movement generated during an earthquake is caused by deformation of the seismic isolation member. Slip occurs in the seismic isolation device due to elastic deformation and sliding bearings, so that a seismic isolation effect is achieved.
In particular, according to the second aspect of the present invention, the elastic sliding bearing is constituted by the seismic isolation device using the seismic isolation member and the sliding bearing. Can be kept small. As a result, no excessive seismic force acts on the equipment on the gantry.

In this case, according to the second aspect of the present invention, the seismic isolation device slips during a large earthquake, but as in the third aspect of the present invention, the origin return means is separately provided between the gantry and the frame. If the is provided, by the origin return means, after the earthquake, the combination of the seismic isolation member and the seismic isolation device by the sliding bearing,
It can be returned to the home position. Here, as the origin return means, a means using an elastic force such as a spring or a rubber block disposed in a horizontal direction between the frame and the gantry can be applied.

In the invention according to any one of claims 1 to 3, when it is desired to reduce the natural frequency in order to obtain a desired vibration isolation performance, an elastic body having low rigidity may be used as the seismic isolation member. Alternatively, the number of sets of seismic isolation members to be overlapped may be increased. In such a case, although the anti-vibration performance is improved, there is a possibility that the horizontal displacement during an earthquake becomes too large. Therefore, as in the invention described in claim 4, a plurality of sets of seismic isolation members are partially
If a restraining jig that regulates horizontal displacement of the seismic isolation member is provided, it is possible to suppress excessive horizontal displacement during an earthquake.

As described above, according to the apparatus for supporting equipment according to the present invention, when installing equipment that generates vibration on a frame, it is necessary to provide a vibration-proof property at normal times and an earthquake resistance. And seismic isolation can be provided together. As a result, as in the invention described in claim 5, any one of the above-described claims 1 to 4 or a supporting device in which a plurality of these are combined with a gantry deck portion that supports a rotating body such as a turbine and a generator. However, if the frame is interposed between the supporting legs of the gantry, a gantry that supports this kind of rotating device can have both the same anti-vibration effect and seismic isolation effect.

[0018]

(Embodiment 1) FIG. 1 shows a supporting device for equipment of the present invention (hereinafter abbreviated as a supporting device).
In the first embodiment, reference numeral 1 in the figure denotes a gantry on which equipment (not shown) is installed, and reference numeral 2 denotes a frame of a structure that supports the gantry 1. A plurality of (two in the figure) laminated rubber or thick laminated rubber (elastic) seismic isolation members 3a and 3b are vertically arranged between the gantry 1 and the upper surface of the frame 2. Are superposed and connected in a connected state. That is, in the seismic isolation members 3a and 3b, the facing flanges are connected via bolts, the upper mounting plate of the upper seismic isolation member 3a is fixed to the gantry 1, and the lower mounting of the lower seismic isolation member 3b. A plate is fixed on the upper surface of the frame 2.

Here, the seismic isolation members 3a and 3b are laminated with each other or with the laminated rubber or with the laminated rubber so as to have a natural frequency required for exhibiting the vibration-proof effect in the vertical direction. Combination with meat laminated rubber is selected. Around the lower seismic isolation member 3b, a plurality of restraining jigs 4 for restricting the horizontal displacement of the seismic isolation member 3b are erected at equal intervals in the circumferential direction.

According to the supporting device having the above structure, two sets of seismic isolation members 3 made of laminated rubber or thick laminated rubber are used.
a and 3b are interposed in the vertical direction, so that these seismic isolation members 3a and 3b are used alone and
Rigidity is smaller than when interposed between
As a result, anti-vibration performance can be exhibited by setting the natural frequency in the vertical direction low. Thus, in normal times, the vibration generated from the equipment can be prevented from being transmitted to the skeleton 2 of the structure by the seismic isolation members 3a and 3b.

With respect to the horizontal displacement movement generated during the earthquake, an excessive seismic force acts on the equipment on the gantry 1 in order to exert the seismic isolation effect by deformation of the seismic isolation members 3a, 3b. There is nothing. At this time, two sets of seismic isolation members 3
As a result of the superposition of a and b, the displacement characteristics of the whole of the seismic isolation members 3a and 3b in the horizontal direction at the time of the earthquake increase, but the seismic isolation members 3b are arranged around the lower seismic isolation member 3b.
Since the restraining jig 4 for restricting the horizontal displacement movement of b is provided, only the seismic isolation member 3a is displaced and moved in the horizontal direction, thereby suppressing excessive horizontal displacement of the gantry 1 during an earthquake. Can be.

(Embodiment 2) Next, FIGS. 2 and 3
Shows a second embodiment of the present invention, and the same components as those shown in FIG. 1 are denoted by the same reference numerals and description thereof will be simplified. As shown in FIG. 2, in this equipment supporting device, the seismic isolation members 3 a and 3 b made of two sets of laminated rubber or thick laminated rubber interposed between the gantry 1 and the upper surface of the frame 2 are used. , Upper seismic isolation member 3a and gantry 1
The seismic isolation device 5 composed of the sliding plate 6 and the sliding member 7 is provided between the two.

That is, a sliding plate 6 made of a stainless steel plate or the like is integrally fixed to the lower surface of the gantry 1, and a Teflon (registered trademark) is attached to an upper mounting plate of the upper seismic isolation member 3a opposed thereto. A sliding member 7 made of a plate or the like is fixed. The sliding plate 6 is formed in such a size that the sliding member 7 can be relatively displaced during an anticipated earthquake, and the sliding member 7 is slidably provided on the sliding plate 6.

On the lower surface of the gantry 1 and around the sliding plate 6, a dustproof cover 8 for covering the outer peripheral portion of the sliding plate 6 which is normally exposed from below is provided below the upper mounting plate of the seismic isolation member 3a. It is provided at a lower position. Further, when there is a request to return the seismic isolation members 3a, 3b to the original position after the earthquake, in addition to the seismic isolation members 3a, 3b3, the frame 2
An elastic member (origin return means) such as a spring or a rubber block is disposed in a horizontal direction between the frame and the gantry 1.

According to the support device of the second embodiment having the above-described structure, the seismic isolation members 3a and 3b are elastically deformed in a normal state similarly to the first embodiment. By exhibiting the effect, it is possible to prevent the vibration generated from the facility equipment from propagating to the skeleton 2 of the structure. In addition, with respect to relatively small horizontal displacement generated during a small-to-medium-scale earthquake, these seismic isolation members 3a, 3a
The seismic isolation effect is exhibited by the elastic force of b. Further, when a large-scale earthquake occurs and seismic force greater than the frictional force between the sliding plate 6 and the sliding member 7 in the seismic isolation device 5 acts, the gap between the sliding plate 6 and the sliding member 7 is increased. Since the slip occurs, it is possible to prevent the seismic force greater than the above-mentioned frictional force from acting on the equipment.

As described above, according to the supporting devices shown in the first and second embodiments, when the equipment that generates vibration is installed on the frame 2 via the gantry 1,
Both vibration isolation in normal times and seismic isolation during an earthquake can be provided. In addition, as shown in the second embodiment, when combined with the seismic isolation device 5 using a sliding bearing, by separately providing the origin return means between the gantry 1 and the frame 2, the origin return means is provided. Due to the elastic force, the support device can be returned to the home position after the earthquake.

(Embodiment 3) Next, FIG. 4 shows an embodiment of a support structure for a rotating equipment stand according to the present invention to which the above-described support device is applied. FIG. 4 shows a building configuration of a steam turbine plant in which a generator is driven by a steam turbine. In the drawing, reference numeral 29 denotes a foundation, 30 denotes a building column installed on the foundation 29, and 31 denotes a building pillar. A condenser 32, a circulating water pipe for supplying cooling water to the condenser 31, and a low-pressure feed superheater 33 for heating the supply water condensed by the condenser 31.

On the base 29, a gantry supporting frame (supporting leg) 27 having a gate shape is erected, and a connecting beam 28 is erected between the upper end of the gantry supporting frame 27 and the building column 30. As a result, the gantry support frame 27 is integrated with the building. On the other hand, reference numeral 24 in the figure denotes a gantry deck, on which a turbine / generator (rotating device) 34 is installed and an enclosure 35 for covering the turbine / generator 24 is provided. ing.

A plurality of sets of seismic isolation members made of laminated rubber (elastic body) similar to those shown in FIG. 1 provided between the gantry deck section 24 and the gantry support frame 27 are superposed on the gantry deck section 24. 3 and 4, a plurality of sets of seismic isolation members made of laminated rubber similar to those shown in FIGS. 3 and 4 and a supporting device 26 constituted by sliding bearings are supported on the gantry supporting frame 27. ing.

In the above-described steam turbine plant, the steam generated by a steam generator such as a boiler (not shown) is guided to the steam turbine in the turbine / generator 24 to drive a generator connected to the steam turbine via a shaft. To generate electricity. The steam that has finished its work in the turbine is led to a condenser 31 installed at the lower part of the turbine, and exchanges heat with a cooling medium supplied by a low-pressure feed water superheater 33 and a circulating water pipe 32 to condense the steam. .

The turbine / generator 24 constructed as described above
According to the gantry support structure provided with, in normal times, the laminated rubber of the support device 25 and the support device 26 is elastically deformed, so that the rotating body of the turbine / generator 34 installed on the gantry deck portion 24 is provided. The vibration generated by the vibration can be suppressed from propagating on the gantry support frame 27. Further, with respect to a relatively small horizontal displacement movement generated during a small-to-medium-scale earthquake, the elasticity of the laminated rubber in the support devices 25 and 26 does not hinder the operation of the turbine / generator 34. The seismic isolation effect can be exerted.

Further, when a large-scale earthquake occurs and an earthquake horizontal force greater than the sliding friction force on the support device 26 acts, slip occurs on the support device 26.
It is possible to prevent the seismic horizontal force greater than the friction force from acting on the turbine / generator 34. At the support points of the support device 25 and the support device 26 in the gantry support frame 27, a reaction force against the seismic horizontal force acting on the gantry deck portion 24 acts, but a connecting beam 28 to the building is provided. This makes it possible to disperse the above-described reaction force to the building pillar 30, and to simplify the gantry support frame 27. As a result, there is an effect that the construction cost can be reduced.

In the above-described embodiment, only the case where the laminated rubber or the thick laminated rubber is used as the seismic isolation members 3a and 3b has been described. However, the present invention is not limited to this. The same operation and effect can be obtained by using an elastic body having vibration isolation and seismic isolation. In the first and second embodiments, the case where the restraining jig 4 is provided around the lower seismic isolation member 3b has been described. However, the present invention is not limited to this, and the seismic isolation member 3a is not limited thereto. 3b has a desired vibration damping property and the displacement amount in the horizontal direction during an earthquake is within an allowable range, the restraining jig 4 may be omitted.

Furthermore, in the second embodiment described above, only the case where the seismic isolation device 5 by the sliding bearing is provided between the gantry 1 and the upper part of the upper seismic isolation member 3a has been described. The seismic isolation device 5 may be provided between the lower part of the lower seismic isolation device 3b and the frame 2 or between the seismic isolation members 3a and 3b.

[0035]

As described above, according to the support device for equipment and equipment according to any one of claims 1 to 4 and the support structure for a rotating equipment stand according to claim 5 using this equipment, In the above, the elastic deformation of the seismic isolation member can prevent the vibration generated from the equipment from propagating to the skeleton of the structure, and in the event of an earthquake, the elastic deformation by the seismic isolation member, and further claims. As in the invention described in 2, the seismic isolation device using the sliding bearing can prevent the seismic force exceeding the sliding limit from acting on the equipment. As a result, when installing the equipment that generates vibration on the skeleton, it is possible to provide both the vibration proof property in normal times and the seismic isolation property in the event of an earthquake.

Further, according to the third aspect of the present invention, when the seismic isolation member and the seismic isolation device using the sliding bearing are combined as in the second aspect of the invention, the origin can be maintained even after the earthquake. The support device can be returned to the origin position by the elastic force of the return means. Further, according to the invention described in claim 4, in the invention described in any one of claims 1 to 3, a plurality of sets of the seismic isolation members are displaced in a horizontal direction by a part of the seismic isolation members in the vertical direction. By arranging the restraining jig that regulates the effect, it is possible to obtain an effect that excessive horizontal displacement during an earthquake can be suppressed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of a support device for equipment according to the present invention.

FIG. 2 is a longitudinal sectional view showing a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of FIG.

FIG. 4 is a front view showing an embodiment of a supporting device for a rotating device stand according to the present invention.

FIG. 5 is a longitudinal sectional view showing a conventional vibration isolator supporting equipment.

FIG. 6 is a longitudinal sectional view showing another conventional vibration damping device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame of equipment 2 Structural body 3a, 3b Seismic isolation member (elastic body) 4 Restraining jig 5 Seismic isolation device by sliding bearing 6 Sliding plate 7 Sliding material 8 Dustproof cover 24 Mounting deck 25, 26 Supporting device 27 Mounting frame (supporting leg) 28 Joint beam to building 34 Turbine / generator (rotating equipment)

Continued on the front page (72) Inventor Masayoshi Kuno 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Inventor Kunihiko Tanaka 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. In-company (72) Inventor Arihiro Yoshida 3-1-1, Sachimachi, Hitachi-shi, Ibaraki Pref.Hitachi, Ltd., Thermal and Hydropower Division (72) Inventor Shoji Uchiyama 3-1-1, Sachimachi, Hitachi-shi, Ibaraki No. 1 F-term in Hitachi, Ltd. Thermal and Hydro Power Division (Reference) 3J048 AA03 AD20 BA08 BE12 BG04 EA38 3J059 AE10 BA43 BB03 DA12 GA42

Claims (5)

[Claims] 1. A device according to claim 1, further comprising a frame on which equipment for generating vibration is installed and a frame of a structure supporting the frame.
A support device for equipment, wherein a plurality of sets of seismic isolation members made of an elastic body are vertically stacked and interposed. 2. A method according to claim 1, further comprising a step of mounting a vibration-generating equipment and a frame supporting the frame.
A plurality of elastically-isolated seismic isolation members are vertically stacked and interposed, and a sliding bearing is provided between the seismic isolation members or between the uppermost or lowermost seismic isolation member and the gantry or frame. A support device for equipment, wherein the device is provided with a seismic isolation device. 3. The equipment supporting device according to claim 2, further comprising origin return means for returning the gantry to its original position between the gantry and the frame. 4. A restraining jig for restricting a horizontal displacement movement of said seismic isolation member is provided at a part of said plurality of superposed seismic isolation members in the vertical direction. 3. The support device for facility equipment according to any one of 3. 5. A support structure of a gantry for supporting a rotating device, wherein a gantry deck for supporting a rotating body in the gantry and a support leg of the gantry are provided. Alternatively, a support structure for a rotating equipment stand, wherein a support device combining a plurality of these is interposed.