JP2002153706A - Core socket of filter element and filter element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the use of a cartridge type filter element, wherein the end part of a core is protruded from an end member, in a large-sized filter apparatus used in a condensed water cleaning system. SOLUTION: A connection core socket 29 has a structure equipped with the cylindrical part 29a, which can be fitted in the end parts 23a and 23b of the core 23 protruded from the annular end member 26 mounted on the longitudinal end part of a filter medium, and a cylindrical throttled part 29e having a diameter smaller than that of the cylindrical part 29a. Therefore, the filter element 22 which is equipped with the cylindrical core 23, the almost cylindrical filter medium provided to the periphery of the core 23 and the annular end member 26 mounted on the longitudinal end part of the filter medium in such a state that the end parts 23a and 23b of the core 23 are protruded, can be easily and certainly supported on the fishplate 10 in the tower main body of the filter apparatus in a suspended state by inserting a shaft member in the core 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core socket of a filtration element disposed in a filtration device used for general industrial condensate, tap water, industrial water, industrial effluent, power plant water, boiler condensate treatment, and the like. The present invention relates to a filtration element equipped with the core socket.

[0002]

2. Description of the Related Art For example, in a thermal power plant, steam generated in a boiler is sent to a high-pressure turbine and a low-pressure turbine in this order.
Each turbine rotates a generator to generate power, and the steam after power generation is cooled by a condenser and sent to a condensate purification system as condensate, which is used repeatedly. In the condensate purification system, the condensate is filtered,
Suspended substances such as iron oxide fine particles generated from piping materials such as boilers and piping materials, and Cu
After removing various ion components such as ions, Na ions, and Cl ⁻ ions, the condensate is passed through a low-pressure feedwater heater and a high-pressure feedwater heater in this order and sent to a boiler. At a boiling water nuclear power plant (BWR), steam generated in a nuclear reactor is sent to a high-pressure turbine and then to a low-pressure turbine, and each turbine rotates a generator to generate electricity. It is cooled, sent to the condensate purification system as condensate, and used repeatedly.
In the condensate purification system, condensate is sent in the order of a filtration device and a condensate desalination device, and suspended substances such as iron oxide fine particles and Cu ions and Na ions generated from equipment such as nuclear reactors and piping materials such as piping. , Cl ^- after removal of the various ion components such as ions,
The condensate passes through the low-pressure feedwater heater and the high-pressure feedwater heater in this order and is sent to the reactor. In addition, the power plant is equipped with a reactor coolant purification system and a fuel pool cooling purification system in addition to the condensate purification system, and these purification systems also remove suspended substances and ionic components generated in the system. Has been removed.

[0003] As a filtration device used in each of the above-mentioned purification systems, for example, a filtration device in which a filter member is suspended and supported in a water collecting hole formed in a plate installed horizontally in a tower body is used. . As the filtration element, a substantially cylindrical cartridge type in which a filtration membrane is disposed around the core in a pleated shape, for example, and which is covered with a polypropylene net, for example, is used. A perforated pipe as a shaft member is disposed so as to penetrate through the hollow portion, and the upper end side of the perforated pipe is inserted into the water collecting hole of the above-mentioned perforated plate, and a filtered water chamber formed above the perforated plate as a boundary. It protrudes to the side and is fixed and suspended using nuts. A cylindrical spacer member is disposed between the lower end of the eye plate and the upper end of the filtration element, thereby regulating the position of the upper end of the filtration element. A nut is mounted on the lower end side of the perforated tube, and the lower end position of the filtration element is regulated by the nut.

[0004]

By the way, in the filtration element used in the above-mentioned filtration device, an annular end member surrounding the core is arranged at the longitudinal end of a filtration membrane as a filter medium. However, the one in which the outer surface of the end member and the end surface of the core are substantially flush with each other is usually used. Therefore, when connecting a plurality of such filtration elements in series, a seal member such as a gasket is provided between end members of adjacent filtration elements.

On the other hand, in a small-sized filtration device used in an ultrapure water production device or the like, an end of a core is projected from an end member, and a water collecting hole formed in the eye plate is inserted through a sealing member such as an O-ring. The filter element has a structure that can be directly connected to the filter element. Such a filter element is convenient when directly attached to the water collecting hole of the board because the end of the core projects from the end member. However, when a plurality of filtration elements are connected and used like a filter member of a filtration device used in the above-mentioned condensate purification system, on the contrary, the end of the protruding core hinders connection. However, such a type of filtration element is not used in a large-sized filtration device used in the above-mentioned condensate purification system or the like.

In a large-sized filtration device used in the condensate purification system, a shaft member such as a perforated pipe is inserted into the core as described above in consideration of the processing flow rate, water pressure, and the like. On the other hand, it is necessary to connect the filtration element firmly in the direction of the eye plate by using a nut for regulating the lower end position. In such a case, if a filter element of the type in which the end of the core protrudes is newly used, it is necessary to newly develop a member used for connection with the shaft member, but such a connection member has a strength as high as possible. The condition is that the structure can exhibit the following. In addition, since a filter element of the above-described type is originally intended to directly connect the end of the core to the water collecting hole of the perforated plate, a sealing member such as an O-ring is provided in advance around the end. ing. Therefore, when using such a type of filtration element in a large-sized filtration device in a condensate purification system or the like, regardless of whether it is used by connecting a plurality of them in series or by itself, If the connecting structure is such that the sealing member can be used, the number of parts can be prevented from increasing more than necessary, which is convenient.

The present invention has been made in view of the above, and uses a cartridge type filtration element having a core end projecting from an end member in a large-sized filtration device used for a condensate purification system or the like. An object of the present invention is to provide a filtration element core socket and a filtration element to which the core socket is attached. Another object of the present invention is to provide a filter element core socket and a filter element to which the core socket is mounted, in which a plurality of filter elements of this type can be easily connected in series to a shaft member.

[0008]

In order to solve the above-mentioned problems, according to the present invention, there is provided a cylindrical core, a filter medium provided in a substantially cylindrical shape around the core, and an outer periphery of the filter medium. A filter element provided with a net member for holding a filter medium, and an annular end member attached to a longitudinal end of the filter medium in a state where the end of the core is protruded, the filter element comprising: Used when the shaft member is inserted and mounted in the tower main body of the filtration device, and formed in a size that can be fitted to the end peripheral surface of the core via a seal member,
A tubular portion having an annular end wall protruding in the axial direction at one end,
A cylindrical throttle portion that projects from the inner peripheral edge of the annular end wall in a direction opposite to the cylindrical portion and has an outer diameter equal to or larger than the outer diameter of the shaft member to be inserted, and has an inner diameter smaller than the cylindrical portion; The present invention also provides a core socket for a filtration element, wherein the tubular portion and the tubular throttle portion are integrally formed. According to the second aspect of the present invention, there is provided the filtration apparatus according to the first aspect, wherein the cylindrical throttle portion is further provided with a seal member for sealing a gap with an outer surface of the shaft member to be inserted. Provides the element's core socket. According to the third aspect of the present invention, a cylindrical core, a filter medium provided in a substantially cylindrical shape around the core, a net member disposed around the filter medium and holding the filter medium, and a longitudinal axis of the filter medium. At the end of the direction, a filtration element having an annular end member mounted with the end of the core protruding, when the shaft is inserted into the core and installed in the tower body of the filtration device, It is used to connect a plurality of filtration elements in series to each shaft member, and is formed in such a size that it can be fitted to the end peripheral surface of each core facing each other in the adjacent filtration element via a seal member. And two cylindrical portions each having an annular end wall protruding in the axial direction at an inner end thereof, and one or more cylindrical members formed between inner peripheral edges of the respective annular end walls and having an outer diameter equal to or larger than the outer diameter of the inserted shaft member. , Formed with an inner diameter smaller than the cylindrical portion And a cylindrical stop portion, said cylindrical portion and the cylindrical narrowed portion to provide a core socket filtration element, characterized in that it is integrally formed. According to a fourth aspect of the present invention, there is provided the core socket of the filtration element according to the third aspect, wherein the length from the annular end wall to the peripheral wall end surface of the two cylindrical portions is substantially the same. In the present invention according to claim 5, the core socket of the filtration element according to any one of claims 1 to 4 is provided at an end of a core protruding from an annular end member attached to a longitudinal end of the filter medium. And a filtration element mounted via a sealing member.

[0009]

Next, the present invention will be described in more detail with reference to the drawings. First, the overall structure of a filtration device using the core socket and the filtration element of the present embodiment will be described with reference to FIGS. In these figures, 1
Denotes a tower main body of the filtration device, and 2 denotes a filter member.
Inside the tower main body 1, a mesh plate 10 in which a plurality of water collecting holes 10a are formed is provided, and a filtered water chamber 11 is formed in an upper portion and an element chamber 12 is formed in a lower portion with the mesh plate 10 as a boundary. ing.

A plurality of filter members 2 are suspended and supported in the element chamber 12 corresponding to the plurality of water collecting holes 10a. Then, the water to be treated flows into the element chamber 12 through the inflow pipe 13,
The inflowing water to be treated hits the lower part (end plate) of the tower, so that the lower part of the tower functions as a baffle plate, is uniformly distributed in the tower, is filtered through the filter member 2, and is filtered. After flowing into the inside, it is sent from the outflow pipe 14 to the next step.

As shown in FIG. 2, the filter member 2 includes a porous tube 21 as a shaft member and a porous tube 2.
And a filtration element 22 mounted around the periphery of the filter element 1. As shown in FIG. 3, the porous tube 21 is formed of, for example, stainless steel, and has a plurality of small holes 21a on its peripheral surface.
Is formed, and has a length capable of supporting a plurality of, for example, two filtration elements 22 along its length direction (see FIG. 2).

An end wall member 21b is fixed to the lower end of the perforated tube 21 when it is suspended from the eye panel 10, and a bolt 21c projects outward from the end wall member 21b. It is fixed so that it does. Further, a flange 21d is welded to the outer periphery at a position shifted from the end, which is the upper end side when suspended on the eye panel 10, by a predetermined length toward the lower end. When the flange 21d is inserted into the water collecting hole 10a of the eye panel 10 from below, the flange 21d abuts on the lower surface of the eye panel 10, and regulates the projection amount of the perforated pipe 21 to the filtration water chamber 11 side to make it constant. is there. Therefore, the welding position of the flange 21d is
When the porous tube 21 is inserted through the water collecting hole 10a, the water collecting hole 1
0a, and on the filtered water chamber 11 side, a water collecting hole 10a
This is a position where a lock nut 21e for preventing falling off from the shaft can be fastened (see FIGS. 2 and 4).

As shown in FIG. 7, the filter element 22 is disposed in a substantially cylindrical shape around a cylindrical core 23 as a filter medium, for example, with a filter membrane 24 folded in a pleated shape. A pleated filter whose outer periphery is covered with a polypropylene net member 25 is used. At each end of the filtration element 22, a substantially annular end member 26 for holding a filtration membrane is provided.
Each end 23a, 23b of the core 23 protrudes outward. The porous tube 21 is provided so as to penetrate the core 23.

As described above, in the present embodiment, two filtration elements 22 are provided along the longitudinal direction of the perforated tube 21.
As shown in FIG. 5, an upper core socket 27 is mounted on an end 23a on the upper end side of the core 23 with an O-ring 23c as a seal member interposed therebetween.
As shown in FIG. 6, a lower end 23b of the lower end side of the core 23 of the filtration element 22 disposed on the lower side has an insertion hole through which a bolt 21c of the porous tube 21 is inserted at the center. A core socket 28 is mounted with an O-ring 23c as a sealing member interposed therebetween. Further, between the lower end 23b of the upper filtration element 22 and the upper end 23a of the lower filtration element 22, as shown in FIG. With a ring (not shown) interposed, a connecting core socket 29 for hermetically connecting the two is mounted.

More specifically, the upper core socket 27 is formed in a substantially cup-shaped cross section as a whole, as shown in FIGS. 8 and 9, and has a cylindrical portion 27a and a cylindrical throttle portion 27b.
And both are integrally formed. Tube part 2
7a is the core 2 protruding from the end member 26.
3 is formed on the peripheral surface of the end 23a with a size that can be fitted via an O-ring 23c (see FIG. 5). Tube part 27a
Is formed at one end thereof with an annular end wall 27c formed to protrude toward the axis of the cylindrical portion 27a. The cylindrical throttle portion 27b is formed so as to protrude from the inner peripheral edge of the annular end wall 27c in a direction opposite to the cylindrical portion 27a. The cylindrical narrowed portion 27b is formed with an inner diameter that is equal to or larger than the outer diameter of the porous tube 21 that is a shaft member, but smaller than the cylindrical portion 27a.

As described above, in the upper core socket 27 of the present embodiment, the cylindrical narrowed portion 27b is formed integrally with the cylindrical portion 27a, and the annular end wall 27c is provided between the two. As a result, when compared to the case where all are formed into a cylindrical shape having the same diameter,
High strength can be obtained even with the same thickness.

A thick portion 27e formed for reinforcement is formed at the tip of the cylindrical narrow portion 27b, and an annular O-ring 27d as a sealing member is mounted on the inner peripheral surface of the thick portion 27e. ing. The O-ring 27d is formed with an inner diameter capable of closely adhering to the periphery of the porous tube 21.
The gap between the cylindrical throttle portion 27b and the porous tube 21 can be sealed.

The lower core socket 28 is shown in FIGS.
As shown in FIG. 1, a tubular portion 28a and a tubular throttle portion 28b similar to the above-mentioned upper core socket 27 are provided, and an annular end wall 28c is formed between them. Further, an annular bottom plate 28e having an insertion hole 28d in which the bolt 21c of the perforated tube 21 is inserted at a substantially central portion is integrally attached to a distal end of the cylindrical throttle portion 28b by welding.
In the lower core socket 28, the cylindrical portion 28a is fitted to the peripheral surface of the lower end portion 23b of the core 23 via an O-ring 23c. At this time, the bolt 21c of the perforated tube 21 is attached to the annular bottom plate 28e. It is inserted through the insertion hole 28d and protrudes downward (see FIG. 6). However, in order to prevent untreated water from leaking from the insertion hole 28d, sealing gaskets 28f and 28g are mounted around the bolt 21c sandwiching the annular bottom plate 28e.

Lower core socket 2 in bolt 21c
A lower nut 30 serving as a lower end position regulating member for regulating a lower end position of the filtration element 22 is disposed below the lower side 8 through a washer 30a (see FIGS. 2 and 6). Of course, the lower nut 30 only needs to be able to prevent the downward movement of the filtration element 22, and the number of the lower nut 30 is not limited at all as long as it can perform such a function.

In this embodiment, the bolt 21c is connected to the flat bar 31 below the lower nut 30.
The flat bar 31 is engaged with the flat bar 31 by being inserted into the connecting hole formed in the flat bar 31 to prevent the flat bar 31 from being detached from the bolt 21c, and to lower the lower end position of the filtration element 22 together with the lower nut 30. Two lock nuts 32 and 33 which also have a regulating function are screwed together. The flat bar 31 is formed in a lattice shape,
It has a structure in which the connection holes are formed at predetermined intervals in front, rear, left and right, and connects bolts 21c of perforated pipes 21 in filter members 2 arranged in a large number in tower body 1 to form an adjacent filter. It serves to keep the interval between the members 2 constant.

The connecting core socket 29 has such a shape that two upper core sockets 27 or lower core sockets 28 each formed in a substantially cup shape are connected to each other with their cylindrical narrowed portions facing each other. I have. That is, as shown in FIG. 12 and FIG.
First, two lower ends 23b of the filtration element 22 arranged on the upper side and two upper ends 23a of the upper end of the filtration element 22 arranged on the lower side are formed to fit each other. It has cylindrical portions 29a and 29b. The inner ends of the cylindrical portions 29a and 29b have annular end walls 29c and 29d protruding in the axial direction, respectively. And
Between the inner peripheral edges of the two annular end walls 29c and 29d, the outer diameter of the porous tube 21 as the shaft member is equal to or larger than the outer diameter.
a, a cylindrical throttle 2 formed with an inner diameter smaller than 29b
9e are formed. In addition, each cylinder part 29a, 29b,
Each of the annular end walls 29c and 29d and the cylindrical throttle portion 29e are integrally formed, and have the same thickness as the upper core socket 27 and the lower core socket 28 as compared with the case where they are formed in a simple cylindrical shape. It is a structure that can obtain high strength. For this reason, each core 23 is attached to each of the cylindrical portions 29a and 29b.
The end portions 23a and 23b are press-fitted with a smaller thickness, and a sufficient strength to withstand the force can be obtained.

Each of the cylindrical portions 29a and 29b has an end 23b on the lower end side of the core 23 of the one filtration element 22 and an end 23a on the upper end side of the core 23 of the other filtration element 22, respectively. Fitted via O-rings 23c, which are sealing members disposed around the ends 23a and 23b, the length from the annular end walls 29c and 29d to the peripheral wall end surfaces 29f and 29g in each of the cylindrical portions 29a and 29b. Are preferably substantially the same. Thereby, the insertion length of each end 23a, 23b into each cylinder 29a, 29b can be made equal.

That is, the formation of the annular end walls 29c and 29d contributes to increasing the strength of the connecting core socket 29 itself as described above, and also makes the adjacent core 2
3 also serves to equalize the insertion lengths of the opposed ends 23a and 23b. When such an annular end wall 29c, 29d is not provided, each of the tubular portions 29a,
Each end 23a, 23 inserted from the opposing direction into 29b
It becomes difficult to make the insertion lengths of b equal, and if one of the insertion lengths is short, wobbling may occur when it is attached to the eye panel 10, or if it is attached as it is, large vibrations may occur during processing. In addition, leakage of untreated water is likely to occur.

As described above, the cylindrical throttle portion 29e formed between the annular end walls 29c and 29d has a diameter larger than the outer diameter of the porous tube 21 but has a smaller inner diameter than the cylindrical portions 29a and 29b. However, it is preferable that the diameter is slightly larger than the outer diameter of the porous tube 21. Thereby, the tubular portion 29a, 29b of the connecting core socket 29 can be easily fitted to the end 23a, 23b of the core 23 of each filter element 22 by the porous tube 21 serving as a guide at the time of mounting, and The filter element 22 can be mounted substantially parallel to the porous tube 21 without bias.

The upper core socket 27, the lower core socket 28, and the connecting core socket 29 are all provided at the end 23a of the core 23 with the O-ring mounted thereon.
Since 23b is press-fitted into each of the cylindrical portions 27a, 28a, 29a, 29b with a predetermined force, a metal material is preferable as a material constituting them in view of strength.
From the point of rust prevention, it is more preferable to form from stainless steel. The molding means is optional, but can be molded by, for example, cold pressing. When manufacturing the connection core socket 29, it is difficult to form the connection core socket 29 only by pressing. For example, the same shape as the lower core socket 28 except for the annular bottom plate 28e is pressed by pressing. And the ends of the cylindrical narrowed portions are butted together and welded to form a single unit.

In this embodiment, as shown in FIG. 4, the perforated pipe 21 is provided with a flange 2 which is in contact with the lower surface of the eye panel 10.
A coil spring 40 as a spring member is disposed around the perforated pipe 21 between 1d and the upper core socket 27 mounted on the core end 23a on the upper end side of the filtration element 22.

Since the upper end of the coil spring 40 contacts the flange 21 d and the lower end of the coil spring 40 contacts the upper core socket 27, the coil spring 40 normally moves from the upper core socket 27 including the two filtration elements 22 to the lower core socket 28. All the parts up to this point are elastically urged so as to press against the lower nut 30 which is the lower end position regulating member. That is, it functions so as to constantly bias each filter element 22 toward the lower nut 30 which is a lower end position regulating member.
Thereby, with the manufacturing tolerance of the filtration element 22 and the shrinkage of the filtration element 22 occurring at the beginning of water passage,
A gap can be prevented from being formed between each of the core sockets 27 to 29 and the filtration element 22, and untreated water that does not pass through the filtration element 22 can be prevented from being generated.

In the present embodiment, first, the porous tube 21
Is mounted with the coil spring 40. Next, the porous tube 2
1, the upper core socket 27 is attached, and one end 23 a of the core 23 of the first filtration element 22 is pressed into the upper core socket 27. Next, the cylindrical throttle portion 29 e of the connecting core socket 29 is inserted into the porous tube 21, and one cylindrical portion 29 a is pressed into the other end 23 b of the core 23 of the first filtration element 22. I do. Then, two filtration elements 22 are inserted around the perforated pipe 21, and one end 2 of the core 23 of the filtration element 22 is inserted.
3a is press-fitted into the other cylindrical portion 29b of the connecting core socket 29.

At this time, according to the present embodiment, since the inner diameter of the cylindrical throttle portion 29e is slightly larger than the outer diameter of the perforated tube 21, the two filtration elements 22 are not biased, and the perforated tube 21 is not biased. Are mounted substantially in parallel to. In addition, since each end portion 23a, 23b of the core 23 can be fitted to each of the cylindrical portions 29a, 29b of the connecting core socket 29 with the insertion lengths being substantially equal, any one of the filtration elements 22 can be fitted. In addition, wobbling does not occur at the time of attachment to the eyeboard 10 or at the time of water passing treatment.

Next, the cylindrical portion 28a of the lower core socket 28 is press-fitted into the other end 23b of the core 23 in the second filtration element 22. In this case,
It is press-fitted into the inner surface of the annular bottom plate 28e with a sealing gasket 28f interposed. Next, another sealing gasket 28g is applied to the bolt 21c protruding from the lower end of the porous tube 21.
And tighten the lower nut 30 to a predetermined position.
At this time, in order to prevent a gap from being generated between the filtration element 22 and each of the core sockets 27 to 29, the lower nut 30 is temporarily provided with a jig for fixing the position of the upper core socket 27, and then the lower core 30 is fixed. The socket 28 is pushed in the direction of the upper core socket 27 and screwed into a predetermined position. The lower core socket 28 serves as a receiving portion of the pressing jig at this time. Therefore, it is necessary to have a strength that does not cause deformation even when the pressing jig comes into contact with the pressing jig.
Sufficiently high strength can be achieved with a smaller thickness as compared to a simple cylindrical shape. Thereafter, the temporary fixing jig is removed to allow the coil spring 40 to function, and then the upper end of the porous tube 21 projecting from the upper core socket 27 is inserted into the water collecting hole 10a of the eye panel 10. Then, it is fixed on the eye panel 10 with a lock nut 21e.
1 and the lock nuts 32 and 33 are screwed together.

As a result, the end member 26 is moved from the core 23
The shaft element supported by hanging the filter element 22 of the type whose end portions 23a and 23b protrude from the water collecting hole 10a of the eye plate 10 even in a large-scale filtration device such as a filtration device of a condensate purification system. It is possible to easily and surely support the support. Moreover, by using the connecting core socket 29, it is possible to easily and reliably arrange a plurality of such filtering elements 22 in series on the shaft member.

In the above-described embodiment, the coil spring 40 is disposed between the board 10 and the upper core socket 27 in the element chamber 12, but projects into the filtered water chamber 11 on the board 10. A configuration in which a coil spring 40 is provided around the perforated tube 21 may be adopted.
Further, as described in the section of the related art, a configuration in which a simple tubular spacer member is provided between the eye panel 10 and the upper core socket 27 without providing the coil spring may be adopted. . However, from the viewpoint of more effectively preventing the generation of untreated water, it is preferable to use a spring member such as a coil spring rather than a simple spacer, and to press and bias in the direction of the lower end position regulating member. In consideration of the quality of the filtered water when rust or the like is generated, it is preferable to dispose the spring member in the element chamber 12 rather than the filtered water chamber 11 as in the above embodiment.

[0033]

According to the present invention, the core socket has a tubular portion which can be fitted to the end of the core protruding from the annular end member attached to the longitudinal end of the filter medium. This is a structure provided with a cylindrical throttle portion having a smaller diameter. Therefore, a cylindrical core, a filter medium provided in a substantially cylindrical shape around the core, a net member disposed on the outer periphery of the filter medium and holding the filter medium, and a core member at a longitudinal end of the filter medium, A filter element of a type having an annular end member mounted with the end of the filter protruded, easily and securely inserts a shaft member into the core to a face plate in the tower body of the filter device. Can be suspended and supported. In addition, because it has a cylindrical throttle part smaller in diameter than the cylindrical part, the strength required when attaching the filtration element to the shaft member is achieved with a thinner thickness compared to a simple cylindrical one. It is possible. Further, in the case of the core socket having the tubular portions on both sides of the tubular throttle portion, the end of the core of the filtration element can be easily and reliably connected and supported without being biased to any one direction. Generation of treated water can be prevented. In addition, since the cylindrical portion is formed in a size that can be fitted to the peripheral surface of the end of the core via a seal member, the core is provided with a seal member such as an O-ring provided at the end of the core in advance. The filter element can be directly used for a filtration element, and there is no need to provide another seal member between the filter element and the end of the core.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an overall structure of a filtration device using a core socket according to one embodiment of the present invention.

FIG. 2 is a view showing a filter member used in the filtration device.

FIG. 3 is a diagram showing a perforated tube used in the filtration device.

FIG. 4 is an enlarged view of a portion A in FIG. 2;

FIG. 5 is an enlarged view of a portion C in FIG. 4;

FIG. 6 is an enlarged view of a portion B in FIG. 2;

FIG. 7 is a perspective view showing a part of a filtration element used in the filtration device.

FIG. 8 is a perspective view showing an upper core socket according to one embodiment of the present invention.

FIG. 9 is a sectional view showing an upper core socket according to one embodiment of the present invention.

FIG. 10 is a perspective view showing a lower core socket according to one embodiment of the present invention.

FIG. 11 is a sectional view showing a lower core socket according to an embodiment of the present invention.

FIG. 12 is a perspective view showing a connection core socket according to an embodiment of the present invention.

FIG. 13 is a cross-sectional view for explaining a mounting position of a connection core socket according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tower main body 10 Eyeboard 10a Water collecting hole 11 Filtration water chamber 12 Element chamber 2 Filter member 21 Perforated pipe 22 Filtration element 27 Upper core socket 28 Lower core socket 29 Connection core socket 27a, 28a, 29a, 29b Tube part 27b, 28b, 29e Cylindrical throttle part 30 Lower nut 40 Coil spring

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshiya Kato 1-2-8 Shinsuna, Koto-ku, Tokyo Organo Corporation (72) Inventor Nobukatsu Inaba 1-2-8 Shinsuna, Koto-ku, Tokyo Olga Nono Co., Ltd.

Claims (5)

[Claims] 1. A cylindrical core, a filter medium provided in a substantially cylindrical shape around the core, a net member provided on an outer periphery of the filter medium and holding the filter medium, and a longitudinal end of the filter medium. A filter element having an annular end member mounted with the end of the core protruding, which is used when a shaft member is inserted into the core and mounted in the tower body of the filtration device, A cylindrical portion formed at a size that can be fitted to the peripheral surface of the end portion of the core via a seal member, and having an annular end wall protruding in the axial direction at one end portion, and an inner peripheral edge of the annular end wall. A cylindrical restricting portion that projects in a direction opposite to the cylindrical portion and has an outer diameter equal to or larger than the outer diameter of the shaft member to be inserted, and having a smaller inner diameter than the cylindrical portion; A filter element characterized in that the part is integrally molded Core socket. 2. The core socket for a filtration element according to claim 1, wherein a seal member for sealing a gap with an outer surface of a shaft member to be inserted is further provided in the cylindrical throttle portion. . 3. A cylindrical core, a filter medium provided in a substantially cylindrical shape around the core, a net member provided on the outer periphery of the filter medium and holding the filter medium, and a longitudinal end of the filter medium. When a filter element having an annular end member mounted with the end of the core protruding is attached to the shaft member when the shaft member is inserted through the core into the tower body of the filtration device, A filter element is used to connect a plurality of filtration elements in series, and is formed in a size that can be fitted to an end peripheral surface of each opposing core in a neighboring filtration element via a seal member, and an inner end thereof. Two cylindrical portions each having an annular end wall protruding in the axial direction at the portion, and the cylindrical portion formed between the inner peripheral edges of the annular end walls and having an outer diameter equal to or larger than the outer diameter of the shaft member to be inserted. A cylindrical throttle formed with a smaller inner diameter than It has a core socket filtration element and the cylindrical portion and the cylindrical narrowed portion is characterized in that it is integrally formed. 4. The core socket for a filtration element according to claim 3, wherein the length from the annular end wall to the peripheral wall end surface of the two cylindrical portions is substantially the same. 5. A core socket of a filtration element according to claim 1, wherein the core socket protrudes from an annular end member attached to a longitudinal end of the filter medium.
A filtration element mounted via a seal member.