JP2006316809A - Suction/exhaust valve with strainer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suction/exhaust valve with a strainer for surely trapping a contaminant and surely exhausting air while permitting the quick suction of a great amount of air. <P>SOLUTION: The suction/exhaust valve comprises the strainer provided on the upstream side of a valve body which has an exhaust valve and a suction valve. The strainer has a strainer body 31 with a filter 32. The filter has an opened bottom 32a and a closed top 32b. The filter in a conical shape has a small air reservoir on the side of the top where a certain amount of air is reserved to permit the passage of the air through the filter by the operation of buoyancy thereon. When negative pressure is generated, the strainer body drops down to permit the quick suction of a great amount of air. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an intake / exhaust valve attached to a water supply pipe or a hot water supply pipe. More specifically, the present invention relates to an intake / exhaust valve provided with a strainer used for capturing foreign matter such as dust contained in a water supply pipe.

  In recent years, even in a water supply system in a building such as an apartment building such as a condominium, a pressure-increasing directly connected water supply is performed by using a booster pump and directly supplying water without providing a water receiving tank. In this system, a branch pipe extends from a vertical pipe extending from the bottom to the upper floor to each floor by a branch pipe, and an intake / exhaust valve as shown in, for example, Japanese Patent Application Laid-Open No. 2005-54927 is attached to the upper end portion of the vertical pipe.

  In this intake / exhaust valve, the air contained in the water accumulates at the upper end of the vertical pipe, so that the situation where the water supply cannot be used by exhausting it is prevented. At times, air is sucked into the vertical pipe to prevent the vertical inside of the vertical pipe from being in a vacuum state, and so-called vacuum break is performed to prevent back flow from the branch side.

  By the way, depending on the state of the pipe material used for the water supply pipe during transportation or storage, dust may enter. In addition, when pipes are constructed, the pipe is threaded, and chips generated at that time may enter the pipe, and further, cutting oil used for the threading also enters the pipe. These dust, oil, and chips are discharged by a washing tube before the intake / exhaust valve is mounted. However, in many cases, they cannot be completely discharged and remain in the pipe. If an intake / exhaust valve is installed at the top of the vertical pipe in this state and the water is filled, the remaining dust will enter the intake / exhaust valve and bite into the valve seat, causing water stop failure. Leakage will occur.

JP 2005-54927 A

  By the way, it is conceivable to install a strainer on the upstream side of the intake / exhaust valve as means for capturing foreign matter such as dust, chips, oil, etc., which bites into the valve seat and interferes with water stoppage. However, currently used strainers have a smaller mesh size to achieve the purpose of catching garbage. Of course, if this is increased, it will not be possible to catch trash.

  If a strainer with such a small mesh is attached directly under the intake / exhaust valve, exhaust cannot be performed. That is, when the vertical pipe is filled with water, the water passes over the strainer and reaches the intake and exhaust valves, and the strainer is submerged in the water. Even if bubbles rise from below the strainer in such a state, the bubbles cannot pass through the water that blocks the small meshes of the strainer, pass through the water, and cannot reach the intake / exhaust valve. Will not be possible.

  In addition, some intake and exhaust valves may not have a functional problem with a small amount of intake air depending on the place of use, but for example, the type disclosed in JP-A-2005-54927 is used for vertical pipes in high-rise houses. Some require a rapid and large intake function. However, even if the intake / exhaust valve itself has a rapid mass intake function, using the strainer with a small mesh as described above will cause a loss during intake, that is, hinder the intake, and the rapid mass intake function will be reduced. I can't show it.

  This invention is made | formed in view of the said problem, and makes it the subject to provide the intake / exhaust valve provided with the strainer which does not impair the exhaust function of an intake / exhaust valve. In addition to the above-described problems, the present invention also provides an intake / exhaust valve having a strainer that also has a function that does not interfere with the rapid mass intake when the intake / exhaust valve itself has a rapid mass intake function. Let it be an issue.

In order to solve the above problems, the present invention relates to an intake / exhaust valve attached to a water supply pipe or a hot water supply pipe, and the intake / exhaust valve body including the intake valve and the exhaust valve, and the intake / exhaust valve. A strainer disposed upstream of the main body, the strainer including a casing and a strainer body disposed in the flow path in the casing, the strainer body having a cone shape and at least The filter comprises a filter having a conical surface formed in a mesh shape, the filter being closed at the top side of the cone and being open at the bottom side. As a result, the air in the water collects in a narrow air reservoir on the upper side, and when a certain amount of air accumulates, it can pass through the mesh of the filter by the buoyancy acting on it, and the exhaust is reliably performed.
In one embodiment, the top of the filter is formed in a mesh and the strainer body is positioned such that the top of the filter cone is downstream. As a result, air is collected in a narrow air reservoir at the inner top of the filter cone surface, and when a certain amount of air is accumulated, it can pass through the filter mesh by buoyancy acting on it.
In yet another embodiment, the strainer body is between a position where it abuts against a seat provided along the circumferential direction of the flow path in the middle of the flow path and a position where the seat is opened away from the seat. It is movable. As a result, rapid mass intake is also possible.
In yet another embodiment, the strainer body comprises a support to which the filter is attached, the support comprising a short cylinder located below the bottom of the filter, the window having a window hole. ing. As a result, even if the filter is clogged with dust or the like, the air moves into the valve body through the window hole and can be exhausted.
An intake / exhaust valve with a strainer.
In other embodiments, the top of the filter is sealed and the strainer body is positioned such that the top of the filter cone is upstream. As a result, air is collected in an air reservoir between the casing outside the conical surface of the filter, and the air reservoir is narrow on the upper side, and when a certain amount of air accumulates, it can pass through the filter by buoyancy.
In another embodiment, the top of the filter is hermetically sealed. Opening a large amount of rapid intake is possible.
In one embodiment, the top of the filter is provided with a check valve that blocks flow from upstream to downstream and allows flow in the opposite direction. Inhalation can be performed by opening the check valve.

In the present invention, since the above-described configuration is adopted, air that cannot pass through the filter if it is simply lifted is collected in a narrow air reservoir, and air can pass through the filter by using the buoyancy acting on the air reservoir, thereby reliably exhausting the air. Can be done.
In addition, since the strainer body can be moved or the top portion can be opened and closed, rapid intake of a large amount of air can be performed when negative pressure is generated upstream.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side elevational view, partly in section, showing an intake / exhaust valve 1 with a strainer according to a first embodiment of the present invention, and a water pipe standing through a stop cock 2 shown on the lower side. It is attached to the top of the tube 3. The water stop cock 2 is used to stop water when performing the maintenance of the strainer described later.

  FIG. 2 is an enlarged sectional view of the intake / exhaust valve 1 of FIG. The intake / exhaust valve 1 is composed of an intake / exhaust valve main body 4 (hereinafter abbreviated as “valve main body”), which may be the same as a conventional structure, and a strainer 21 connected to the valve main body 4 on the upstream side. Yes. This figure shows a normal use state in which intake and exhaust are not performed. Water enters a valve body 4 through a stop cock (not shown) through a stop cock and reaches a water level L. Yes. Air is accumulated above the water level L. Since the valve body 4 shown here has a structure substantially similar to that disclosed in Japanese Patent Application Laid-Open No. 2005-54927 and the like, and is already known, the description of the structure will be simplified.

Reference numeral 5 denotes a casing, which includes a lower main body 6 and a cover 7 covering the upper part.
Reference numeral 8 denotes a bonnet that partitions the inside of the casing 5 into two upper and lower chambers 9 and 10. The upper chamber 9 is connected to a drain pipe (not shown) at the connection port 9a. The bonnet 8 is provided with an exhaust valve 11 and an intake valve 16. That is, the exhaust valve 11 includes a cylindrical packing holder 12 that is inserted and fixed in a vertical through hole formed in the bonnet 8 and a packing presser 13 that is inserted and fixed to the cylindrical packing holder 12. Is fixed as shown. The lower end of the packing 14 functions as a valve seat.

  Reference numeral 15 denotes a float valve body, which is made of a resin having a small specific gravity, floats on water in the lower chamber 10 and is received by the support portion 8a of the bonnet 8 on the one hand, and hits the lower end of the packing 14 on the other hand, The exhaust hole 14a is closed. As will be described later, when the float valve 15 is tilted, the exhaust hole 14a of the packing 14 is opened and exhausted. A plurality of vertical ribs 10a for guiding the vertical movement of the float valve body 15 at predetermined intervals in the circumferential direction are received on the inner periphery of the lower chamber 10, and the float valve 15 dropped at the bottom is received in a state of floating from the bottom. A plurality of radial ribs 10b are formed. In addition, an opening 10c is provided at the bottom of the lower chamber 10 and communicates with the connecting portion 6a.

  The intake valve 16 includes a mushroom-type intake valve body 17, and the intake valve body 17 is urged upward by a spring 18 and is pressed against an O-ring 19 attached to the lower surface side of the opening 8 b formed in the bonnet 8. The opening 8b is closed. When negative pressure is generated on the lower chamber 10 side, the valve element 17 is lowered against the spring 18 to open the opening 8b and take in air. Since the structures of the exhaust valve 11 and the intake valve 16 are known, further detailed description is omitted. The configurations of the exhaust valve and the intake valve are not limited to the above.

  Reference numeral 21 denotes a strainer connected on the upstream side of the valve body 4 and includes a casing 22. The casing 22 has a cylindrical upper cylindrical portion 23 screwed to a connecting portion 6a formed at the lower end of the casing main body 6 of the valve main body 6 at an upper end portion, and an upper cylindrical portion 23 via a shoulder portion 25 spreading outward. The lower cylinder part 24 with a large diameter connected to is provided. As shown in the drawing, the inner surface of the shoulder 25 is a seat or upper receiving surface 25a for receiving a strainer body 31 described later when the strainer body 31 is in the illustrated position. A cylindrical connecting pipe 27 is connected to the lower cylindrical portion 24 by a cap nut 26. The connecting pipe 27 is provided with a flange 28 at the upper end, the diameter of the hole 29 is smaller than the inner diameter of the lower cylindrical portion 24, and the upper surface of the flange 28 is obtained when a strainer body 31 (to be described later) moves downward from the illustrated state. It becomes the lower receiving surface 28a.

  Here, the strainer body 31 will be described with reference to FIG. 3A is a plan view of the strainer body 31, FIG. 3B is a longitudinal sectional view, and FIG. 3C is a bottom view. The strainer body 31 includes a filter 32 and a support 33 to which the filter 32 is attached. As described above, the filter 32 is provided with a mesh that is large enough to catch dust, chips or oil mixed in the water, but the shape of the filter 32 is a cone whose interior is empty as shown in the figure. The bottom 32a side of the lower end side is open, but the top part 32b on the upper side is closed, and an inclined conical surface 32c is formed between them. Note that the shape of the filter 31 is not limited to a conical shape, and may be a quadrangular pyramid or the like, and even if it is not a perfect cone, the surface from the bottom 32a to the top 32b swells upward. It suffices if the shape is inclined so as to be completely round. These are collectively called cones. Moreover, the upper part 32b side is not sharp but may be beaten in a short range in the vertical direction to have a truncated cone shape. However, the cross-sectional area of the top portion 32b must be small so that the buoyancy acting on the air at that portion becomes sufficiently large per unit area, as will be described later. These truncated cones are collectively called cones. In addition, although the above-mentioned "the top part 32b is closed", this does not necessarily mean that it is sealed, there is no member like the bottom part 32a, and it opens completely. It is the purpose except when there is. A case of a mesh shape as in the present embodiment is also included in “closed”. Further, in the present embodiment, the mesh of the top portion 32b is partially closed by the rib 38 of the support 33 or the coupling portion 38a thereof. Even in such a case, “the top portion has a mesh shape”. To do. In other words, as will be described later, it is only necessary that a mesh through which air can pass when a certain condition is reached is formed even at a “top” formed in a certain range near the upper end of the cone.

  The support body 33 is made of a resin having a small specific gravity, and the entire strainer body 31 floats on water. The support 33 includes an upper annular portion 34, a lower annular portion 36 having a diameter larger than that of the upper annular portion 34, and a flange portion 37 that extends in a radial direction connecting them. A plurality of window holes 35 are formed in the upper annular portion 34 so as to be spaced apart from each other in the circumferential direction. From the upper end portion of the upper annular portion 34, four ribs 38 provided at intervals of 90 degrees in the circumferential direction extend upward, and their upper ends are integrated with a coupling portion 38a. The above-described filter 32 is attached in a state of being attached to the inside of the rib 38 as illustrated. Reference numeral 39 denotes leg portions formed to extend outward and downward from the lower annular portion 36, and four legs are formed at intervals of 90 degrees in the circumferential direction. The outer shape of the flange portion 37 is smaller than the inner diameter of the lower annular portion 36. Further, the outer surface of the leg portion 39 has a size close to the inner periphery of the lower annular portion 36, and guides the vertical movement of the strainer body 31 described later.

  Referring again to FIG. 2 in addition to FIG. 3, the strainer body 31 is submerged in water. However, since the specific gravity is smaller than that of water, the strainer body 31 is biased upward by the action of buoyancy, and is near the upper surface outer periphery of the upper annular portion 34. 2, the lower surface of the shoulder portion 25 of the casing 22 is abutted against the seat, and the upper end surface of the leg portion 39 is also in contact with the lower surface of the shoulder portion 25, and is held at the position of FIG. 2. During intake, which will be described later, the strainer body 31 moves downward. At this time, the leg portion 39 is guided by the inner peripheral surface of the lower cylindrical portion 24 of the casing 22 as described above.

  Next, the movement and exhaust operation of the air in the water will be described with reference to FIG. 4. The air in the water moves upward and enters the strainer body 31. At this time, a window hole 35 is formed in the upper annular portion 34, but since air moves straight upward, it does not flow through the window hole 35 and enters the filter 32. Similarly, dust or the like carried by the water flow enters the filter 32 and hits the conical surface 32c of the filter 32 and is captured. By the way, even if the air moves upward and hits the conical surface 32c of the filter 32, it cannot pass through the mesh of the filter 32 at that position as described above, and moves upward along the inner surface of the conical surface 32c of the filter 32. And accumulates in the top 32b. Buoyancy acts on the air accumulated in the top 32b. While the amount of accumulated air is small, it cannot pass through the mesh, but as the amount of air increases, the buoyancy acting on it increases. And since the area of the top part 32b is small, the force per unit area which acts on the top part 32b of the filter 32 from the air side gradually becomes large, and when it reaches a certain value, the force which water tries to close the mesh At that moment, the air gathers and the water pushes away and flows up through the mesh.

  The air that has passed through the filter 32 flows into the lower chamber 10 of the casing 5 of the valve body 4 and accumulates. The water level L falls with it. When a certain amount of air accumulates in the top portion 32b of the filter 32 as described above, it repeatedly passes through the filter 32 and flows into the lower chamber 10, and air gradually accumulates in the lower chamber 10, and the water level L decreases. When the water level L is lowered to a certain level, the buoyancy acting on the float valve body 15 is lowered, and as shown in the figure, the float valve body 15 is inclined with the exhaust packing 14 as a fulcrum, and the exhaust hole 14a is opened. The air is exhausted from the connection port 9a through the drain pipe. When exhausted, the water level L rises and the float valve 15 closes the exhaust hole 14a again.

  If dust or the like is trapped by the filter 32 and the mesh of the filter 32 is blocked, and air cannot escape through the mesh as described above, air accumulates in the filter 32. Since the excess air flows into the lower chamber 10 through the window hole 35, the exhaust operation is performed without any trouble. However, before the filter 32 is clogged with dust or the like, the filter 32 will be cleaned or replaced by regular inspection or the like. The strainer body 31 can be cleaned and replaced by loosening the cap nut 26 and removing the intake / exhaust valve 1.

  Next, the intake operation will be described with reference to FIG. When a negative pressure is generated on the upstream side, water in the vertical pipe and the intake / exhaust valve 1 flows to the upstream side, and a negative pressure is generated. Then, the intake valve body 17 moves downward against the spring 18 and opens the opening 8a to perform intake. At this time, since the filter 32 is not submerged in water, air can flow downward through the mesh. However, as described above, the filter 32 is for catching dust and the like, so that its mesh is small and resists air flow even if it is not immersed in water. Although there is no problem if the amount to be sucked is small, as described above, there are some intake / exhaust valves that require a rapid and large intake function. In that case, if the strainer body 31 described above is fixed at the position shown in FIG. 2 or 3, there is a possibility that a problem occurs in the rapid mass intake. In the present embodiment, the following configuration is adopted to solve the problem.

  That is, as described above, the support body 33 of the strainer body 31 is made of a resin having a small specific gravity, and when the inside of the vertical pipe is filled, it is urged upward by buoyancy, and the upper end of the upper annular portion 34 is It is positioned against the inner surface of the shoulder portion 25 of the casing 22. Therefore, if water flows upstream due to the generation of negative pressure, the effect of buoyancy is lost, and the action of negative pressure generated below it and the action of air flowing in immediately lead to the position shown in FIG. The customer part 9 comes into contact with and is supported by the upper surface 28a of the flange part 28 of the connecting pipe 27, and stops at the illustrated position. Accordingly, the lower end opening of the upper cylindrical portion 23 is completely opened, and the air that has flowed in can flow through between the customer portions 39 of the support 33, so that a large amount of rapid intake can be performed. A weak spring that can be overcome by the negative pressure may be applied to the strainer body 31 so as to be biased upward.

  FIG. 6 is a view showing an intake / exhaust valve 51 according to the second embodiment, and corresponds to FIG. 1 in the first embodiment. In this embodiment, the strainer 21 is arranged on the same axis as the vertical pipe 3 and the intake / exhaust valve valve body 4 in the first embodiment, whereas the strainer 52 is offset in the lateral direction. It is a point that is arranged. In this case, the same intake / exhaust valve body 4 or strainer body 31 as that in the first embodiment can be used. The advantage of this embodiment is that the strainer body 31 can be removed simply by removing the cap 54 that closes the upper side of the casing 53 of the strainer 52, and the entire intake / exhaust valve needs to be removed as in the first embodiment. There is no point.

  FIG. 7 is a view showing a strainer-equipped intake / exhaust valve 56 according to the third embodiment, which also corresponds to FIG. 1 in the first embodiment. The feature of this embodiment is a so-called Y-type strainer. As shown in the figure, the strainer portion 57 has an axial line of the casing 58 in the axial direction of the vertical pipe 3, the stop cock 2, the intake / exhaust valve main body 4 and the like. It is arranged in an inclined state with respect to a certain angle. The strainer body 31 used in this embodiment is the same as that used in the first embodiment. As in the second embodiment, the strainer body 31 can be removed by removing the cap 59. For example, the strainer body 31 is tilted in the opposite direction with respect to the axis of the casing 58 by an angle at which the casing 58 is tilted with respect to the standpipe 3 or the like, and is parallel to the axis of the standpipe 3 or the like. You may attach to the casing 58. FIG. This makes it easier for air to collect at the top of the filter. Alternatively, the shape of the conical surface of the strainer body filter itself can be made the same even if its apex is shifted from the center of the bottom.

  8 and 9 are views showing a strainer-equipped intake / exhaust valve 61 according to the fourth embodiment. FIG. 8 is a longitudinal sectional view during normal use, and FIG. 9 is a sectional view of a main part during intake. First, the structure will be described with reference to FIG. The intake / exhaust valve 61 is also composed of a valve body 62 and a strainer 65. Since the valve main body 62 is different from that of the first embodiment only in the shape of the connecting portion 63a formed below the casing main body 63, description of other parts is omitted. Both the exhaust valve and the intake valve provided in the valve main body 62 may be the same as those in the first embodiment.

  The strainer 65 includes a casing 66, and the casing 66 includes an upper cylindrical portion 67 and a lower cylindrical portion 68 that have the same inner diameter with a flange 69 interposed therebetween. A vertical pipe (not shown) is provided below the lower cylindrical portion 68. A connecting portion 70 to be connected is provided. As shown in the figure, the casing 66 is attached in such a manner that the upper cylindrical portion 67 is screwed to the connecting portion 63a at the lower portion of the casing main body 63 of the valve main body 62 and the flange 69 is in contact with the lower end of the connecting portion 63a.

  A strainer body 71 is disposed in the casing 66, and the strainer body 71 includes a mesh-like filter 72 and a support body 73. Unlike the filter 32 in the first embodiment, the filter 72 itself has a truncated cone shape that is open on both upper and lower sides, and is arranged with the truncated cone turned upside down. Illustration of the mesh of the filter 72 is omitted.

  The support body 73 includes an inner annular portion 74 and an outer annular portion 75 provided on the lower side, and radial ribs 76 extending in the radial direction that are provided at intervals of 90 degrees in the circumferential direction, connecting both of them. Provided at an interval of 90 degrees in the circumferential direction, which is located above and connects the upper annular portion 77 having a larger diameter than the lower outer annular portion 75 and the upper annular portion 77 and the lower outer annular portion 75. And a vertical rib 78 extending obliquely outward in the radial direction. And the part of the outer peripheral side of the upper ring part 77 is pinched | interposed and fixed between the bottom part of the casing main body 63 of the valve main body 62, and the upper end of the upper cylinder part 67 of the casing 66 of the strainer 65 as shown in the figure. The above-described filter 72 is disposed inside the vertical rib 78, and is attached to the support 73 with its upper and lower ends in contact with the upper annular portion 77 and the lower outer annular portion 75.

  The strainer body 71 further includes a check valve 81. The check valve 81 includes a valve body 82. The valve body 82 has a shaft portion 82a fitted into an inner annular portion 74 on the lower side of the support body 73, and a disc-shaped head portion provided at a lower end portion thereof. The upper portion of the portion 82a and the inner annular portion 74 are urged upward by the action of the compression spring 83 disposed so as to surround the shaft portion 82a, and the hole defined by the outer annular portion 73 is closed. ing.

  In the normal use state of FIG. 8, the air in the water flows as indicated by an arrow A in the figure. That is, since the lower end of the filter 72 is closed by the head portion 82b of the valve body 82, the air does not enter the filter 72 from there, and the inclined surface or the conical surface spreading toward the upper side of the filter 72. It flows into the air reservoir 84 between the inner peripheral surface of the casing 66. As is apparent from the figure, the air reservoir 84 has a smaller cross-sectional area as it goes upward. As described in the first embodiment, the air flowing into the air reservoir 84 cannot immediately pass through the mesh of the filter 72. However, when a certain amount of air accumulates, the buoyancy that acts is increased, and the water that closes the mesh is pushed away. And pass through the filter 72 together. Hereinafter, the exhaust operation is the same as that of the first embodiment.

  In the case of intake air, the negative pressure generated as shown in FIG. 9 causes the valve body 82 of the check valve 81 to drop downward, opening a hole in the outer annular portion 75 below the support 73. . As a result, rapid large intake is possible.

  In this embodiment, the window hole 35 in the first embodiment is not provided. The angle of the inclined surface of the filter 72 is steeply inclined so that dust or the like can be captured above the filter 72, and even in this case, the passage of air can be performed in the lower portion of the filter 72. The filter 72 can be cleaned and replaced simply by removing the valve body 62. Further, in the above embodiment, the check valve 81 is provided at the lower end of the filter 72 in order to realize rapid mass exhaust. However, the lower end may be closed in a mesh shape when it is not necessary. . Furthermore, the lower end may be sealed without a mesh. In any case, air may be moved upward along the conical surface of the cone, for example, by rounding the lower end side.

  In each of the above embodiments, the intake / exhaust valve main body and the strainer body are configured using separate casings and coupled to each other, but the intake / exhaust valve main body and the strainer body are combined using a single casing. Of course, it is possible to configure integrally, and there is no problem in adopting such a configuration.

It is the side elevation which made the partial cross section which shows the state which attached the intake / exhaust valve with a strainer which concerns on the 1st Embodiment of this invention to the standing pipe. A side sectional view of an intake / exhaust valve with a strainer shows a normal use state. It is a figure of a strainer body, (A) is a top view, (B) is a longitudinal sectional view, and (C) is a bottom view. It is a sectional side view which shows an exhaust state. It is a sectional side view which shows an inhalation state. It is a side elevation view which shows 2nd Embodiment which offset the strainer. It is a side elevation view which shows 3rd Embodiment which made the strainer Y type. It is a sectional side view which shows the intake / exhaust valve with a strainer which concerns on 4th Embodiment, and shows the time of normal use. It is a sectional side view of the principal part which shows at the time of inhalation.

Explanation of symbols

    1: Strain intake / exhaust valve 2: Stop cock 3: Stand pipe 4: Intake / exhaust valve body 11: Exhaust valve 16: Intake valve 21: Strainer 22: Casing 31: Strainer body 32: Filter 32a: Bottom 32b: Top 32c : Conical surface 33: Support body 34: Upper circular part 35: Window hole 39: Leg part

Claims (8)

  In an intake / exhaust valve attached to a water supply pipe or a hot water supply pipe, the intake / exhaust valve includes an intake / exhaust valve main body provided with an intake valve and an exhaust valve, and a strainer disposed upstream of the intake / exhaust valve main body, The strainer includes a casing and a strainer body disposed in a flow path in the casing. The strainer body has a cone shape and at least a portion of the cone surface is a net-like shape. An intake / exhaust valve with a strainer, comprising a formed filter, wherein the top of the cone is closed and the bottom is open.   2. The intake / exhaust valve with strainer according to claim 1, wherein the top portion of the filter is formed in a mesh shape, and the strainer body is disposed so that the top portion of the cone of the filter is located on the downstream side. An intake / exhaust valve with a strainer.   The intake / exhaust valve with a strainer according to claim 2, wherein the strainer body is in contact with a seat provided along the circumferential direction of the flow path in the middle of the flow path, and the seat away from the seat. An intake / exhaust valve with a strainer, which is movable between the open position and the open position.   The intake / exhaust valve with a strainer according to claim 2 or 3, wherein the strainer body includes a support body to which the filter is attached, and the support body includes a short cylindrical portion positioned below the bottom of the filter, An intake / exhaust valve with a strainer, characterized in that a window hole is opened in the cylindrical portion.   5. The intake / exhaust valve with strainer according to claim 4, wherein the support is made of a resin having a specific gravity smaller than that of water.   2. The intake / exhaust valve with strainer according to claim 1, wherein the top portion of the filter is sealed, and the strainer body is disposed such that a top portion of the cone of the filter is located upstream. Intake and exhaust valves with strainers.   The intake / exhaust valve with strainer according to claim 6, wherein the top of the filter is sealed so as to be openable and closable.   The intake / exhaust valve with strainer according to claim 7, wherein the top portion is provided with a check valve that prevents flow from the upstream side to the downstream side and allows flow in the opposite direction. Intake / exhaust valve with strainer.

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