JP2019118848A - Strainer device - Google Patents

Abstract

To provide a strainer device which enables replacement of foreign matter removal means while circulating a fluid.SOLUTION: A strainer device has: a body 10; a case 20; foreign matter removal means 30; seal means 50; and closing means 40 which closes an opening of the case 20. The body 10 has: a housing space 13 which extends along an axis L1, is opened at one end, and closed at the other end; and an input passage 14A and an output passage 14B. A cylindrical case 20 has a pair of communication ports 24 which continue into the input passage 14A and the output passage 14B. The case 20 can move between a housing position where the case 20 is housed in the housing space 13 and a protruding position where the case 20 protrudes from an opening of the housing space 13. The foreign matter removal means 30 has: a cartridge 31 having a pore 31a; and a filter 35 housed in the cartridge 31 and serving as a foreign matter removal material.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a strainer device disposed in a fluid passage such as gas to remove foreign matter.

  As disclosed in Patent Document 1, a body of a general strainer device has a main cylindrical portion extending linearly and a sub cylindrical portion protruding in a direction inclined with respect to the main cylindrical portion. . A fluid passage is formed in the main cylindrical portion. The sub-cylindrical portion accommodates a screen (foreign substance removing means) for capturing foreign matter. One end of the screen is supported by an annular support in the fluid passage, and the other end is supported by a lid screwed to the end of the sub cylinder.

  When the foreign material trapping effect of the screen is reduced by long-term use, the lid is removed from the cylinder of the body, the screen is removed from the body, replaced with a new screen and re-mounted, or cleaned and re-mounted.

JP, 2008-80189, A

  In the strainer device of the above configuration, since the fluid passage is opened to the outside through the cylindrical portion until the screen is removed from the body and re-mounted, the fluid flow is performed on the upstream side and the downstream side of the strainer device. It was necessary to shut off temporarily to avoid fluid leakage, causing inconvenience for the user.

In order to solve the above-mentioned subject, the strainer device of the present invention,
A. A body having an accommodation space extending along an axis and open at one end and closed at the other end, and an inlet passage and an outlet passage extending in a direction intersecting with the axis and continuing to the accommodation space;
B. A state in which the cylindrical shape is open at one end and the other end is closed, and the peripheral wall has a pair of communication ports respectively connected to the inlet passage and the outlet passage, and the opening at one end is in the same direction as the opening of the accommodation space A case movable between a housing position housed in the housing space and a projecting position projecting from the opening of the housing space;
C. Foreign matter removing means which is contained in the case and removes foreign matter from the fluid while allowing the fluid to flow;
D. The inner periphery of the case and the outer periphery of the case are mounted between the inlet passage and the outlet passage and the opening on the inner periphery of the accommodation space, and in the state where the case is located at the accommodation position and the case where the case is located. Sealing means for sealing between the inner periphery of the housing space and
E. Sealing means for releasably sealing the opening of the case;
It is characterized by having.

  According to the above configuration, the foreign matter removing means is accommodated in the housing space of the body while being supported by the case, and the foreign matter removing means is taken out and remounted in a state where the case protrudes from the body. In the case where the case is housed in the housing space and in the state where the case is projected, the outer periphery of the case and the inner periphery of the housing space are sealed by the sealing means. It is possible to do the work of wearing.

Preferably, the seal means includes a first seal ring closer to the inlet passage and the outlet passage, and a second seal ring closer to the opening of the housing space, and the case is located at the housing position. In the state where the first and second seal rings are in contact with the area between the communication port and the opening of the case on the outer periphery of the case, and the case is located at the protruding position, The first seal ring contacts the outer periphery of the closed end of the case, and the second seal ring contacts an area between the communication port and the opening of the case on the outer periphery of the case.
According to the above configuration, the first seal ring can seal between the case outer periphery and the inner periphery of the accommodation space in a state in which the case is accommodated in the accommodation space and in a state where the case protrudes. The second seal ring can seal between the outer periphery of the case and the inner periphery of the accommodation space even in the process of moving the case from the accommodation position to the projecting position.

Preferably, the accommodation space has a back side accommodation portion extending to the opposite side of the opening of the accommodation space when viewed from the inlet passage and the outlet passage, and the case is located at the accommodation position. The closed end portion is accommodated in the back side accommodation portion.
According to the above configuration, the case can be stably supported.

Preferably, an annular mounting groove is formed on the outer periphery of the closed end of the case, and a locking ring is mounted on the mounting groove, and a first locking groove is formed on the inner periphery of the back side accommodation portion. And a second locking groove is formed between the first seal ring and the inlet passage and the outlet passage on the inner periphery of the housing space, and the case is located at the housing position. In the state where the locking ring is locked in the first locking groove, and in the state where the case is located in the projecting position, the locking ring is locked in the second locking groove .
According to the above configuration, the case can be reliably held at the set storage position and the protruding position, and the sealing function by the first seal ring can be reliably performed particularly at the protruding position of the case.

Preferably, the foreign matter removing means includes a cylindrical cartridge which is accommodated in the case and has air permeability, and a foreign matter removing material accommodated in the cartridge.
According to the above configuration, by using the cartridge, the foreign matter removing means can be easily taken out and remounted.

Preferably, in the state where the cartridge is housed in the case, one end thereof abuts on the closed end of the case, and a part of the peripheral wall of the cartridge faces the pair of communication ports of the case.
According to the above configuration, the structures of the case and the cartridge can be simplified.

More preferably, a knob is formed to project from the other closed end of the cartridge.
According to the above configuration, the cartridge can be easily taken out of the case by grasping the knob portion.

The case has a flow path forming portion disposed closer to the closed end in the inner space, and the flow path forming portion is connected to one of the pair of communication ports and extends toward the axis of the body. And a second portion extending toward the opening of the case along the axis of the body and continuing to the first portion, the tip having an open end, and the first portion and the second portion form an L shape An internal passage is formed, and the cartridge has a cylindrical portion and an annular mounting portion formed at one end of the cylindrical portion, and the mounting portion is mounted on the outer periphery of the second portion of the flow path forming portion The cylindrical portion is separated from the peripheral wall of the case in this mounted state.
According to the above configuration, since the fluid flows around the entire circumference of the cartridge, the foreign matter removal effect can be enhanced.

Preferably, the body has a cylindrical portion extending along the axis and a pair of connection ports formed to protrude from the side portion of the cylindrical portion, and the inlet is provided on the end face of the pair of connection ports. A passage and the outlet passage are respectively opened, and an outer lid for closing the opening of the accommodation space is screwed to the cylindrical portion of the body, and the closing means is an end on the opening side of the case. Including a case lid screwed to the
According to the above configuration, the case lid can close the opening of the case with a simple structure, and the outer lid can close the opening end of the accommodation space and the case.

More preferably, the case lid has an engagement protrusion on the outer end face thereof, and the outer lid has a screw hole that can be screwed with the engagement protrusion.
According to the above configuration, the case can be easily accommodated by removing the outer lid and turning in the opposite direction, and holding the outer lid while pulling the outer lid while the engagement convex portion of the case lid and the screw hole of the outer lid are screwed together. It can be removed from the space.

  According to the strainer device of the present invention, the foreign matter removing means can be taken out and remounted in a state in which the fluid is circulated.

1 is a cross-sectional view of a strainer device according to a first embodiment of the present invention. It is sectional drawing which shows the first process at the time of taking out a cartridge from the said strainer apparatus. FIG. 21 is a cross-sectional view showing an intermediate step in removing the cartridge. It is sectional drawing which shows the last process at the time of taking out the said cartridge. It is sectional drawing of the body of the said strainer apparatus. It is a disassembled perspective view of the said strainer apparatus. It is sectional drawing of the strainer apparatus which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the first process at the time of taking out a cartridge from the said strainer apparatus in 2nd Embodiment. FIG. 21 is a cross-sectional view showing an intermediate step in removing the cartridge in the second embodiment. FIG. 14 is a cross-sectional view showing the last step of removing the cartridge in the second embodiment. It is a disassembled sectional view of the strainer device of a 2nd embodiment. It is sectional drawing of the strainer apparatus which accommodated the foreign material removal material which is different in the cartridge in 2nd Embodiment.

Hereinafter, a strainer device according to a first embodiment of the present invention will be described with reference to the drawings. The strainer device of the present embodiment is attached to the middle of the fuel gas supply passage and is used to remove fine dust contained in the gas, such as rust or the like released from the inner wall of the gas supply passage.
As shown in FIGS. 1 and 6, the strainer apparatus includes, as main components, a body 10, a case 20, a foreign matter removing means 30, a sealing means 40 for the case 20, and the body 10 and the case 20. And an outer lid 60.

  As shown in FIG. 5, the body 10 has a substantially cylindrical tubular portion 11 extending along the axis L1, and a pair of connection ports projecting from the side of the tubular portion 11 along the axis L2 orthogonal to the axis L1. It has twelve. The cylindrical portion 11 has a first protrusion 11 a that protrudes long from the pair of connection ports 12 and a second protrusion 11 b that protrudes short in the opposite direction.

  The internal space of the cylindrical portion 11 is provided as a housing space 13. The accommodation space 13 extends along the axis L1, and the inner periphery of the accommodation space 13 has a cylindrical surface of the same diameter over the entire length. The housing space 13 is open at the tip of the first protrusion 11 a. The opening end of the housing space 13 is denoted by reference numeral 13a. The accommodation space 13 is closed by the second protrusion 11 b. The closed end of the accommodation space 13 is denoted by reference numeral 13 b.

  The body 10 is formed with a pair of gas passages 14A and 14B extending along the axis L2. One end of each of the gas passages 14A and 14B opens to the end face of the pair of connection ports 12, and the other end opens to the inner periphery of the accommodation space 13. A female screw 14a is formed at the tip of the pair of gas passages 14A and 14B. For example, an upstream gas pipe is connected to the right gas passage 14A, and a downstream gas pipe is connected to the left gas passage 14B. Be done. Thus, the gas flows in the direction indicated by the arrow in FIG. Hereinafter, the right gas passage 14A is referred to as an inlet passage, and the left gas passage 14B is referred to as an outlet passage.

  The housing space 13 includes an inlet passage 14A, an opening side housing portion 13x (a housing portion corresponding to the first projecting portion 11a of the body 10) occupying between the outlet passage 14B and the open end 13a, an inlet passage 14A, an outlet passage It has the back side accommodation part 13y (accommodation part corresponding to the 2nd projection part 11b of body 10) which occupies between 14B and closed end 13b, and middle accommodation part 13z which follows entrance passage 14A and exit passage 14B. ing.

  The inner peripheral surface of the intermediate accommodation portion 13z of the accommodation space 13 is cut out because the inlet passage 14A and the outlet passage 14B are opened, but in FIG. There is.

  An annular mounting groove 15a for mounting a first seal ring 51 described later is formed in the vicinity of the inlet passage 14A and the outlet passage 14B on the inner periphery of the opening side housing portion 13x of the housing space 13. The opening end 13a In the vicinity, an annular mounting groove 15b for mounting a second seal ring 52 described later is formed.

  An annular first locking groove 16a is formed on the inner periphery of the rear side accommodation portion 13y of the accommodation space 13, and an inlet passage 14A, an outlet passage 14B, and a mounting groove 15a are formed on the inner periphery of the opening side accommodation portion 13x. An annular second locking groove 16b is formed between them. The end portions on the side of the inlet passage 14A and the outlet passage 14B of the locking grooves 16a and 16b are tapered.

  An external thread 17 is formed on the outer periphery of the tip of the first projection 11a of the cylindrical portion 11 of the body 10, and an annular mounting groove 18 is formed closer to the connection opening 12 than the external thread 17. . A seal ring 55 consisting of an O-ring is mounted in the mounting groove 18.

  As shown in FIGS. 1 and 6, the case 20 has a cylindrical shape, and is accommodated in the accommodation space 13 of the body 10 so as to be movable along the axis L1. One end of the case 20 is opened and the other end is closed. The open end is shown at 21 and the closed end is shown at 22. The peripheral wall of the case 20 is formed with a pair of communication ports 24 respectively connected to the inlet passage 14A and the outlet passage 14B.

  The closed end 22 of the case 20 is thick and protrudes from the pair of communication ports 24 to the opposite side of the open end 21. An annular mounting groove 25 is formed on the outer periphery of the closed end 22, and a locking ring 26 formed of a C ring is mounted on the mounting groove 25. A female screw 27 is formed on the inner periphery of the case 20 near the opening end 21.

  When the case 20 is housed in the housing space 13 of the body 10, the open end 21 faces the same direction as the open end 13a of the housing space 13, and the closed end 22 is the back side housing portion of the housing space 13. It is housed in 13y. The locking ring 26 is fitted in the first locking groove 16a of the back side accommodation portion 13y, whereby the case 20 is positioned at the set accommodation position. The pair of communication ports 24 are disposed in communication with the inlet passage 14A and the outlet passage 14B.

  As shown in FIGS. 1 and 6, the sealing means 50 has a first seal ring 51 and a second seal ring 52 consisting of O-rings mounted in the mounting grooves 15a and 15b of the body 10 respectively. . These seal rings 51 and 52 are in contact with the area between the pair of communication ports 24 and the open end 21 on the outer periphery of the case 20 in a state where the case 20 is accommodated in the accommodation space 13 of the body 10 Thus, the space between the inner circumference of the housing space 13 of the body 10 and the outer circumference of the case 20 is sealed.

As shown in FIGS. 1 and 6, the foreign matter removing means 30 has a cylindrical cartridge 31 and a cylindrical filter 35 (foreign matter removing material) housed in the cartridge 31. The filter 35 is formed of, for example, a sponge of polyvinyl formal having a three-dimensional network of completely continuous pores. A large number of pores 31 a are formed in the peripheral wall of the cartridge 31 so that the gas can flow. The cartridge 31 may be configured by a net.
One end of the cartridge 31 is open and the other end is closed. The open end of the cartridge 31 abuts on the closed end 22 of the case 20, and the closed end is disposed on the open end 21 side of the case 20. The lower portion of the peripheral wall of the cartridge 31 in FIG. 1 is disposed to face the pair of communication ports 24 of the case 20. At the closed end of the cartridge 31, a knob 32 is formed to protrude.

As shown in FIGS. 1 and 6, the sealing means 40 airtightly seals the open end 21 of the case 20 in a state in which the cartridge 31 is accommodated, and the case cover 41 and the seal ring 49 consisting of an O-ring Have. The case lid 41 has an external thread 42 and an annular mounting groove 43 on the outer periphery, and a sealing ring 49 is mounted to the mounting groove 43.
The case lid 41 is screwed into the female screw 27 of the case 20, and the seal ring 49 contacts the inner peripheral surface near the opening end 21 of the case 20, thereby closing the opening end 21 of the case 20.

  A recess 44 for housing the knob 32 of the cartridge 31 is formed on the inner end surface of the case lid 41, and an engagement protrusion 45 is formed on the outer end surface. A male screw 45a is formed on the outer periphery of the engagement convex portion 45, and a tool hooking hole 45b is formed on the tip end surface.

As shown in FIGS. 1 and 6, on the inner periphery of the skirt portion of the outer lid 60, a female screw 61 to be screwed with the male screw 17 at the tip of the first projecting portion 11a of the body 10 is formed. A screw hole 62 is formed in a convex portion formed at the center of the top wall.
The outer lid 60 is screwed into the first projecting portion 11 a of the body 10, and the seal ring 55 contacts the inner periphery of the skirt portion of the outer lid 60, whereby the opening end 13 a of the housing space 13 is airtightly sealed.

  The operation of the strainer device having the above configuration will be described. As shown in FIG. 1, in a state where the case 20 incorporating the cartridge 31 is accommodated in the accommodation space 13, the gas flowing from the inlet passage 14A passes fine pores in the process of passing through the pores 31a of the cartridge 31 and passing through the filter 35. It is removed and flows out of the outlet passage 14B. The seal ring 51, 52 seals between the outer periphery of the case 20 and the inner periphery of the housing space 13 of the body 10, and the open end 21 of the case 20 is airtightly sealed by the case cover 41 and the seal ring 49. Since the open end 13a is hermetically sealed by the outer lid 60 and the seal ring 55, the gas does not leak out of the strainer device.

When replacing the filter 35 after long-term use, the cartridge 31 is pulled out according to the following procedure.
First, as shown in FIG. 2, the outer lid 60 is removed from the cylindrical portion 11 of the body 10, and the outer lid 60 is turned upside down so that the engagement convex portion 45 of the case lid 41 is screwed into the screw hole 62. In the state, the outer lid 60 is grasped by hand and pulled. As a result, the locking ring 26 attached to the closed end 22 of the case 20 is disengaged from the first locking groove 16 a of the back side accommodation portion 13 y of the accommodation space 13, and the case 20 is the open end 13 a of the accommodation space 13. Are drawn along the axis L1. Eventually, as shown in FIG. 2, the locking ring 26 is fitted into the second locking groove 16 b, whereby the case 20 is held at the set projecting position.

When the case 20 is in the projecting position, the closed end 22 of the case 20 closes the opening side accommodation portion 13 x of the accommodation space 13, and the first seal ring 51 contacts the outer periphery of the closed end 22. The opening side accommodation portion 13x is sealed. Therefore, the gas does not leak from the strainer device even if the gas supply is continued.
When the case 20 is in the projecting position, the gas flowing into the inlet passage 14A does not pass through the case 20, the cartridge 31, and the filter 35, but passes through the intermediate accommodating portion 13z of the accommodating space 13 to the outlet passage 14B.

  While the case 20 moves from the storage position of FIG. 1 to the protruding position of FIG. 2, the first seal ring 51 can not exert a sealing function because the communication port 24 of the case 20 passes through the first seal ring 51. (2) Since the seal ring 52 is always in contact with the outer periphery of the case 20, gas leakage in this process can be prevented. The second seal ring 52 can be omitted if the gas leak in this short time can be tolerated.

  Next, the outer lid 60 is removed from the case lid 41, and a tool is put on the tool hooking hole 45b of the case lid 41, and the case lid 41 is removed by rotating the case lid 41. As a result, as shown in FIG. 3, the open end 21 of the case 20 is opened, and the knob 32 of the cartridge 31 is exposed.

  Next, as shown in FIG. 4, the grip portion 32 of the cartridge 31 is grasped by hand, and the cartridge 31 is pulled out along the axis L1. The old filter 35 is removed from the cartridge 31, and the filter 35 is cleaned or replaced with a new filter 35, and mounted on the cartridge 31 again. After this, the above steps are performed in the reverse order. Briefly, after the cartridge 31 is accommodated in the case 20 and the open end 21 of the case 20 is closed by the case lid 41, the case 20 is pushed along the axis L1. Thereby, the locking ring 26 is fitted into the first locking groove 16 a, and the case 20 is housed in the housing space 13. Thereafter, the outer cover 60 is screwed into the body 10.

  Next, a strainer device according to a second embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 7 and 11, since the body 10, the sealing means 40, the sealing means 50, and the outer lid 60 of this strainer device are the same as in the first embodiment, the same numbers are assigned to the respective parts. The detailed explanation is omitted.

  The case 20 'of the second embodiment has a cylindrical shape as in the first embodiment, and the same components as those of the case 20 of the first embodiment have the same reference numerals and the detailed description thereof will be given. I omit it. The case 20 'has a flow path forming portion 28 disposed closer to the closed end 22 in its inner space. The flow path forming portion 28 has a first portion 28a connected to the inlet side communication port 24 and extending along the axis L2 of the body 10 toward the axis L1, and a second portion 28b extending along the axis L1 toward the opening end 21. ing. The tip of the second portion 28b is open. An L-shaped internal passage 29 is formed by the first portion 28a and the second portion 28b.

The cartridge 31 'of the foreign matter removing means 30' according to the second embodiment includes a cylindrical portion 36 (cylindrical portion), an annular mounting portion 37 formed at one end of the cylindrical portion 36 and having a U-shaped cross section, and a mounting portion 37. And a disc 38 connected to the inner end of the disc. Similar to the first embodiment, the cartridge 31 'is formed of a large number of pores or is formed of a net and is breathable.
A cylindrical filter 35 is accommodated in the cartridge 31 '. One end of the filter 35 is fitted into the mounting portion 37 of the cartridge 31 '.

  The mounting portion 37 of the cartridge 31 'is mounted on the outer periphery of the second portion 28b of the flow path forming portion 28 of the case 20'. In this mounted state, the mounting portion 37 abuts on the first portion 28 a of the flow path forming portion 28, and the other end of the cartridge 31 ′ is pressed by the case lid 41. A convex portion 44 ′ is formed on the case lid 41, and the convex portion 44 ′ intrudes into the filter 35.

  The cartridge 31 'is biased from the communication port 24 of the case 20' toward the opening end 21 in the mounted state. The cylindrical portion 36 of the cartridge 31 'is separated from the peripheral wall of the case 20', and an annular passage 100 is formed between the two.

  In the second embodiment, as shown by the arrow in FIG. 7, the gas flowing in from the inlet passage 14A passes through the internal passage 29 of the flow passage forming portion 28, passes through the disc portion 38 of the cartridge 31 ′, and passes through the filter 35. And through the cylindrical portion 36 of the cartridge 31 'and the annular passage 100 towards the outlet passage 14B. Furthermore, part of the gas passes through the filter 35, passes through the mounting portion 37, and travels to the outlet passage 14B. As described above, since the gas passes through the wide area of the filter 35, the foreign matter removing effect can be enhanced.

  When replacing the filter 35, as shown in FIG. 8, the case 20 'is pulled out to the projecting position using the outer lid 60, and then the outer lid 60 and the case lid 41 are removed as shown in FIG. The cartridge 31 'is exposed, and then, as shown in FIG. 10, the cartridge 31' is taken out and the filter 35 is replaced. These steps are the same as in the first embodiment, and thus detailed description will be omitted.

  In the second embodiment, the first portion 28 a of the flow path component may be connected to the outlet side communication port 24. The disc portion 38 of the cartridge 31 'can be omitted.

  The strainer device of the above embodiment is configured to remove fine dust (foreign matter) flowing through the gas passage, but may be configured to remove vapor (foreign matter) in the gas. In this case, a dehumidifying agent such as silica gel is filled in the cartridge as a foreign matter removing material instead of the filter. When the dehumidifying agent is used in the first embodiment, it is necessary to close the lower end of the cartridge 30. In the second embodiment, as shown in FIG. 12, the dehumidifying agent 35 'may be filled using the same cartridge 31'.

The present invention is not limited to the above embodiment, and various aspects are possible. For example, the cartridge may be disposable with the foreign material removal material.
The strainer device of the present invention can be mounted on a fluid passage other than gas, for example, a water pipe, and can be used to remove foreign matter such as dust from water flowing in the water pipe.

  The present invention can be applied to a strainer device attached to a fluid passage.

DESCRIPTION OF SYMBOLS 10 body 11 cylinder part 12 connection port part 13 accommodation space 13y back side accommodation part 14A inlet channel 14B outlet channel 16a first locking groove 16b second locking groove 20, 20 'case 22 closed end 24 communication port 25 mounting groove 26 Locking ring 28 Flow path forming portion 28a First portion 28b Second portion 29 Internal passage 30, 30 'Foreign matter removing means 31, 31' Cartridge 32 Pinch portion 35 Filter (foreign matter removing material)
35 'Dehumidifier (foreign material removal material)
36 Cylindrical part (tube part)
37 mounting portion 40 sealing means 41 case lid 50 sealing means 51 first seal ring 52 second seal ring 60 outer lid

Claims (10)

A. A body having an accommodation space extending along an axis and open at one end and closed at the other end, and an inlet passage and an outlet passage extending in a direction intersecting with the axis and continuing to the accommodation space;
B. A state in which the cylindrical shape is open at one end and the other end is closed, and the peripheral wall has a pair of communication ports respectively connected to the inlet passage and the outlet passage, and the opening at one end is in the same direction as the opening of the accommodation space A case movable between a housing position housed in the housing space and a projecting position projecting from the opening of the housing space;
C. Foreign matter removing means which is contained in the case and removes foreign matter from the fluid while allowing the fluid to flow;
D. The inner periphery of the case and the outer periphery of the case are mounted between the inlet passage and the outlet passage and the opening on the inner periphery of the accommodation space, and in the state where the case is located at the accommodation position and the case where the case is located. Sealing means for sealing between the inner periphery of the housing space and
E. Sealing means for releasably sealing the opening of the case;
A strainer device comprising: The sealing means has a first seal ring near the inlet passage and the outlet passage, and a second seal ring near the opening of the housing space.
The first and second seal rings are in contact with an area between the communication port and the opening of the case on the outer periphery of the case in a state where the case is located at the accommodation position,
The first seal ring is in contact with the outer periphery of the closed end of the case in the state where the case is located at the projecting position, and the second seal ring is the opening of the communication port and the case at the outer periphery of the case The strainer device according to claim 1, wherein the strainer device is in contact with an area between the two.   The accommodation space has a back side accommodation portion extending to the opposite side of the opening of the accommodation space when viewed from the inlet passage and the outlet passage, and the case is closed when the case is located at the accommodation position. The strainer device according to claim 2, wherein an end portion is accommodated in the back side accommodation portion. An annular mounting groove is formed on the outer periphery of the closed end of the case, and a locking ring is mounted on the mounting groove,
A first locking groove is formed on the inner periphery of the back side housing portion, and a second locking groove is formed between the first seal ring and the inlet passage and the outlet passage on the inner periphery of the housing space. Is formed,
When the case is in the storage position, the locking ring is locked in the first locking groove, and when the case is in the protruding position, the locking ring is the lock. The strainer device according to claim 3, wherein the strainer device is locked in the second locking groove.   The strainer device according to any one of claims 1 to 4, wherein the foreign matter removing means includes a cylindrical cartridge housed in the case and having air permeability, and a foreign matter removing material housed in the cartridge. .   The cartridge is characterized in that one end thereof is in contact with the closed end of the case in a state of being accommodated in the case, and a part of the peripheral wall of the cartridge faces the pair of communication ports of the case. The strainer device according to claim 5.   The strainer device according to claim 6, wherein a grip portion is formed to be protruded at the other closed end of the cartridge. The case has a flow path forming portion disposed closer to the closed end in the inner space, and the flow path forming portion is connected to one of the pair of communication ports and extends toward the axis of the body. And a second portion extending toward the opening of the case along the axis of the body and continuing to the first portion, the tip having an open end, and the first portion and the second portion form an L shape An internal passage is formed,
The cartridge has a cylindrical portion and an annular mounting portion formed at one end of the cylindrical portion, and the mounting portion is mounted on the outer periphery of the second portion of the flow path forming portion, and in this mounted state The strainer device according to claim 5, wherein the cylindrical portion is separated from the peripheral wall of the case. The body has a cylindrical portion extending along the axis, and a pair of connection ports formed to project from the side portion of the cylindrical portion, and the inlet passage and the inlet passage are formed on the end surfaces of the pair of connection ports. Each outlet passage is open,
An outer lid for sealing the opening of the housing space is screwed into the cylindrical portion of the body,
The strainer device according to any one of claims 1 to 8, wherein the sealing means includes a case lid screwed to an open end of the case.   10. The strainer device according to claim 9, wherein the case lid has an engaging convex portion on the outer end face thereof, and the outer lid has a screw hole screwable with the engaging convex portion. .

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