JP2018066422A - Filter-tipped valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter-tipped valve which prevents entry of a foreign substance and thereby is hardly closed by the foreign substance.SOLUTION: A filter-tipped valve 1 comprises: a casing 10 provided with a fluid inlet 11, a valve chamber 12, a valve seat section 13 and a fluid outlet 14; a valve body 20 which is arranged in the valve chamber 12; and a filter 60 which is installed on the casing 10 at a fluid inlet 11 side. The filter 60 has: a filter body 61 provided with a receiving face section 611 arranged substantially vertically to a flow direction of fluid, a side face section 612 extending from an outer periphery of the receiving face 611 in the flow direction F of the fluid, and a plurality of through holes on the receiving face section 611 and the side face section 612; and a rib section 62 which extends from a leading end of the side face section 612 in a direction substantially vertically to the flow direction F of the fluid and is supported by the casing 10.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a valve with a filter.

  Conventionally, foreign matter may be mixed in the fluid flowing from the primary side to the secondary side. For example, the debris and rust of the component of the apparatus connected to a primary side are mentioned. Such foreign matter mixed into the fluid has an adverse effect on a valve or the like provided in the piping, and sometimes hinders the operation or failure of the valve.

  Therefore, it is conceivable to prevent foreign matter from entering the valve by catching foreign matter with a filter provided on the primary side of the valve. For example, a strainer combined check valve having a strainer formed of a wire mesh has been proposed (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 55-61418

  In the proposed checker combined check valve, the strainer formed by gradually reducing the diameter from the secondary side toward the primary side is positioned closer to the primary side than the check valve with the opening facing the secondary side. Be placed. By disposing such a strainer on the primary side of the check valve, foreign matters mixed in the fluid can be captured (filtered).

  On the other hand, when many foreign substances are captured by the strainer, the strainer may be clogged (clogged) and the flow rate of the fluid may be reduced. In order to avoid such a situation, it is preferable to have a structure that is not easily clogged (blocked).

  Therefore, an object of the present invention is to provide a valve with a filter that prevents entry of foreign matter and is not easily blocked by foreign matter.

  The present invention relates to a filter comprising: a casing formed with a fluid inlet, a valve chamber, a valve seat, and a fluid outlet; a valve body disposed in the valve chamber; and a filter disposed on the fluid inlet side of the casing. The filter includes a receiving surface portion disposed substantially perpendicular to a fluid flow direction, and a side surface portion extending from an outer periphery of the receiving surface portion in a direction along the fluid flow direction. A filter body comprising: a filter main body having a plurality of apertures formed in the surface portion and the side surface portion; and a rib portion extending in a direction substantially perpendicular to the fluid flow direction from the tip side of the side surface portion and supported by the casing. Regarding valves.

  Moreover, it is preferable that a notch or a gap through which a fluid can flow is formed in a portion of the rib portion and the casing that supports the rib portion.

  Moreover, it is preferable that the said receiving surface part has a recessed part dented in the flow direction of the fluid.

  Moreover, it is preferable that the valve with a filter further includes an urging portion that urges the valve body toward the valve seat portion.

  In addition, the filter body further includes a flange portion formed to extend in a direction substantially perpendicular to the fluid flow direction from the distal end side of the side surface portion, and the rib portion is formed with a cut at a predetermined interval on the outer periphery. It is preferable to include an annular plate member and be formed by bending the outer peripheral side of the plate member so as to sandwich the collar portion.

  ADVANTAGE OF THE INVENTION According to this invention, the valve with a filter which is hard to be obstruct | occluded with a foreign material can be provided, preventing the entrance of a foreign material.

It is the top view which looked at the valve with a filter concerning one embodiment of the present invention from the primary side. FIG. 2 is a sectional view taken along line AA in FIG. 1. It is the top view which looked at the valve with a filter of one embodiment from the secondary side. It is sectional drawing which shows the filter of FIG. It is a top view which shows the plate member of the valve | bulb with a filter of one Embodiment. It is the top view which bent the outer peripheral side of the plate member of the valve with a filter of one embodiment. The schematic sectional drawing which shows operation | movement of the 2nd valve seat part when a foreign material approachs between the 1st seal | sticker part and 1st valve seat part of the non-return valve of the valve with filter of one Embodiment is shown. The schematic sectional drawing at the time of a foreign material approaching between the 2nd seal part and the 2nd valve seat part of a check valve of a valve with a filter of one embodiment is shown. The schematic sectional drawing at the time of a foreign material approaching into the outer peripheral side between the 2nd seal part and the 2nd valve seat part of the check valve of the valve with a filter of one embodiment is shown. The schematic sectional drawing of the modification of the check valve of the valve with a filter of one embodiment is shown.

Hereinafter, an embodiment of a valve with a filter according to the present invention will be described with reference to the drawings.
The valve with a filter is connected between pipes through which fluid flows. The valve with filter is connected to both a primary side pipe (fluid inlet side pipe) provided on the upstream side of the fluid and a secondary side pipe (fluid outlet side pipe) provided on the downstream side of the fluid.

  In the present embodiment, a check valve with a filter will be described as an example of the valve with a filter.

  As shown in FIGS. 1 to 3, the valve with filter 1 according to the present embodiment includes a casing 10, a valve body 20, an urging unit 40, and a filter 60.

The casing 10 is a member in which a flow path 15 through which fluid flows is formed, and constitutes the outer shape of the valve with filter 1. The casing 10 includes a fluid inlet 11, a valve chamber 12, a valve seat portion 13, and a fluid outlet 14.
The fluid inlet 11 is disposed at the primary end of the flow path 15. A primary side pipe is connected to the fluid inlet 11.
The fluid outlet 14 is disposed at the end of the secondary side in the flow path 15. A secondary side pipe is connected to the fluid outlet 14.

The valve chamber 12 is disposed between the fluid inlet 11 and the fluid outlet 14 in the flow path 15 and is formed as a space having a larger diameter than the fluid inlet 11 and the fluid outlet 14.
The valve seat portion 13 is formed in a concave shape by the inner wall surface on the primary side in the valve chamber 12. Details of the valve seat 13 will be described later.

  In the present embodiment, the casing 10 is formed by combining the first casing 111 constituting the primary side and the second casing 112 constituting the secondary side, and being fastened by the bolt 50 and integrated. The first casing 111 is formed with a primary portion of the fluid inlet 11, the valve seat portion 13, and the valve chamber 12. The second casing 112 is formed with a portion on the secondary side of the valve chamber 12 and the fluid outlet 14.

  The valve body 20 is disposed in the valve chamber 12 and is disposed to face the valve seat portion 13. The valve body 20 is formed in a convex shape so as to be in close contact with the valve seat portion 13. Details of the valve body 20 will be described later.

  The urging unit 40 is disposed on the secondary side of the valve body 20 in the valve chamber 12. The urging unit 40 urges the valve body 20 toward the valve seat 13 side. The urging unit 40 includes a plate-like body 41, an elastic member 42, and a shaft member 43.

  The plate-like body 41 is formed of, for example, an inelastic material (for example, metal) and is superimposed on the fluid outlet 14 side of the valve body 20. In the present embodiment, the plate-like body 41 is formed in a substantially circular shape having substantially the same diameter as the valve body 20 and is disposed along the secondary side surface of the valve body 20. A plurality of through holes (not shown) are formed in the plate-like body 41. Thereby, the fluid can be caused to flow between the plate-like body 41 and the valve body 20. Therefore, the pressure (back pressure) of the fluid applied from the fluid outlet 14 side to the fluid inlet 11 side acts on the valve body 20 without being obstructed by the plate-like body 41.

  The elastic member 42 is a so-called compression spring, and biases the plate-like body 41 from the fluid outlet 14 side toward the fluid inlet 11 side. One end side of the elastic member 42 is disposed in contact with the surface of the plate-like body 41 on the fluid outlet 14 side, and the other end side thereof is disposed in contact with the inner surface of the valve chamber 12 on the fluid outlet 14 side. The elastic member 42 contracts when the valve body 20 is pushed by the pressure at which the fluid flows from the fluid inlet 11 side to the fluid outlet 14 side, whereby the valve body 20 and the plate-like body 41 move to the secondary side. Thus, the valve body 20 is separated from the valve seat portion 13. The elastic member 42 extends in a state where no pressure is applied due to the inflow of fluid from the fluid inlet 11 side to the fluid outlet 14 side, and presses the plate-like body 41 and the valve body 20 against the valve seat 13 side.

The shaft member 43 is disposed so that the length direction thereof is along the fluid inflow direction F. Further, the shaft member 43 is disposed so as to coincide with the position of the central axis of the elastic member 42. In the present embodiment, the central axis of the shaft member 43 is disposed so as to coincide with the central position of the flow path 15 of the casing 10.
The primary side of the shaft member 43 passes through the valve chamber 12, and the secondary side extends to the fluid outlet 14 of the casing 10. The shaft member 43 is inserted into the primary side support member 16 extending radially inward from the casing 10 at the primary end, and is movable in the axial direction (along the fluid inflow direction F) with respect to the casing 10. Supported. Further, the shaft member 43 is inserted into the secondary side support member 17 extending radially inward from the casing 10 at the secondary side end portion, and is axially directed to the casing 10 (along the fluid inflow direction F). ) Supported for movement.
The above shaft member 43 guides the movement of the valve body 20 and the plate-like body 41 to the primary side or the secondary side.

  As shown in FIG. 2, the filter 60 is disposed on the fluid inlet 11 side of the valve chamber 12 in the flow path 15 of the casing 10. The filter 60 catches foreign matters having a size larger than a predetermined size (for example, exceeding 1.4 mm), and prevents foreign matters from entering the valve body 20. As shown in FIG. 4, the filter 60 includes a filter body 61 having a convex shape when viewed from the primary side into which foreign matter flows and a rib portion 62, and is arranged so that the concave opening faces the fluid outlet 14 side. Is done.

  As shown in FIG. 1, the filter body 61 has a plurality of apertures formed on the entire surface. In the present embodiment, the filter main body 61 is formed by pressing a metal net (for example, a stainless net having a mesh of 14 mesh, a wire diameter of 0.4 mm, and an opening of 1.4 mm) knitted in a mesh shape. . Thereby, a plurality of apertures are formed on the entire surface of the filter body 61. The filter main body 61 includes a receiving surface portion 611, a side surface portion 612, and a flange portion 613.

  The receiving surface portion 611 is a portion corresponding to the top surface of the convex filter body 61 and is disposed substantially perpendicular to the fluid flow direction F. The receiving surface portion 611 is formed in a circular shape when viewed from the front. Moreover, the receiving surface part 611 has the recessed part 614 dented toward the secondary side. The concave portion 614 is formed by bending the central portion of the receiving surface portion 611 to the secondary side in the fluid flow direction F.

  The side surface portion 612 is a portion corresponding to the side surface of the concave filter body 61 and extends in the direction along the fluid flow direction F from the outer periphery of the receiving surface portion 611. That is, the side surface portion 612 is formed in a cylindrical shape extending from the entire circumference of the receiving surface portion 611 toward the secondary side in the fluid flow direction F. The side surface portion 612 is integrally formed with the receiving surface portion 611. In the present embodiment, the side surface portion 612 extends in a direction bent approximately 90 degrees with respect to the receiving surface portion 611.

  The flange portion 613 extends substantially perpendicularly to the fluid flow direction F from the distal end side of the side surface portion 612 (the side opposite to the receiving surface portion 611 that is the base end side). In the present embodiment, the flange portion 613 is integrally formed with the filter main body 61 by bending a mesh-like metal net at the distal end portion of the side surface portion 612. The flange portion 613 constitutes a part of a rib portion 62 described later.

  The rib portion 62 extends substantially perpendicularly to the fluid flow direction F from the distal end side of the side surface portion 612 (the side opposite to the receiving surface portion 611 which is the base end side). The rib portion 62 is formed with a notch or a gap through which fluid can flow. The rib part 62 includes the flange part 613 and the plate member 621 described above.

  As shown in FIG. 5, the plate member 621 is formed in an annular shape with cuts d formed at predetermined intervals on the outer periphery. Further, the inner diameter of the plate member 621 is formed to be substantially the same as the inner diameter of the side surface portion 612. Then, as shown in FIG. 6, the plate member 621 is bent so that a part of the cuts d with a predetermined interval remain. As shown in FIG. 2, the plate member 621 is formed so as to allow fluid to flow through the notch d by being bent so as to sandwich the flange portion 613.

  The filter 60 described above is disposed in the first casing 111 with the rib portion 62 supported by the portion L of the casing 10 that supports the rib portion 62. 1 and 2, in the filter 60, the receiving surface portion 611 is disposed on the primary side (the fluid inlet 11 side), and the rib portion 62 (the flange portion 613) is the secondary side (the fluid outlet 14 side). Placed in. Thereby, the filter 60 is disposed so that the opening side (front end side) faces the valve chamber 12. Note that a notch or a gap through which fluid can flow is also formed in the portion L of the casing 10 that supports the rib portion 62 (not shown).

  The receiving surface portion 611 passes the fluid flowing through the central portion of the flow path 15 among the fluid flowing from the primary side to the secondary side. Thereby, the receiving surface part 611 can catch the foreign material mixed in the fluid flowing from the primary side to the secondary side. Since the recess 614 is formed in the receiving surface portion 611, the strength of the receiving surface portion 611 can be improved as compared with the case where the receiving surface portion 611 is formed only by a surface perpendicular to the fluid inflow direction F.

  The side surface portion 612 and the rib portion 62 allow the fluid flowing on the outer peripheral side of the flow path 15 out of the fluid flowing from the primary side to the secondary side. Here, in the present embodiment, the side surface portion 612 is configured to include a plurality of apertures, and is disposed along the fluid inflow direction F, thereby allowing the side surface portion 612 to pass while passing a part of the fluid. Can prevent clogging with foreign matter. Further, a notch or a gap through which the fluid can flow is formed in the rib portion 62 and the portion L supporting the rib portion 62 in the casing 10, so that the fluid passing through the rib portion 62 also flows into the valve chamber 12. Can do.

  Thereby, a flow along the inflow direction F can be formed on the outer peripheral side of the side surface portion 612, and a part of the fluid flowing on the outer peripheral side of the side surface portion 612 is allowed to flow in from the side surface portion 612, and a part thereof is a rib portion. 62. Therefore, the pressure loss due to the arrangement of the filter 60 can be reduced. Further, the plate member 621 protects the flange portion 613 corresponding to the terminal end of the filter main body 61 formed by knitting the metal wire, so that the filter main body 61 is prevented from being damaged due to the metal wire being unraveled, and the shape of the filter 60 Can be maintained.

  Next, details of the valve seat portion 13 and the valve body 20 of the present embodiment will be described.

As shown in FIG. 2, the valve seat portion 13 includes a first valve seat portion 131 and a second valve seat portion 132.
The first valve seat portion 131 is formed as a vertical surface (surface along the radial direction of the flow path 15) perpendicular to the fluid inflow direction F. The first valve seat portion 131 is disposed on the fluid inlet 11 side in the valve chamber 12. Specifically, the first valve seat portion 131 is disposed so as to surround the outer periphery of the inlet of the valve chamber 12 among the inner wall surface of the valve chamber 12 on the fluid inlet 11 side. In the present embodiment, the first valve seat portion 131 is annularly arranged along the outer periphery of the inlet of the valve chamber 12.

  The second valve seat portion 132 is disposed on the outer peripheral side of the first valve seat portion 131. The second valve seat portion 132 includes a vertical surface 133 and an inclined surface 134.

  The vertical surface 133 is formed as a surface perpendicular to the fluid inflow direction F. The vertical surface 133 is formed as an inner peripheral surface among the surfaces forming the second valve seat portion 132. Further, the vertical surface 133 is disposed along the outer periphery of the first valve seat portion 131. In the present embodiment, the vertical surface 133 is disposed so as to form a step between the first valve seat portion 131 and the fluid outlet 14 side of the first valve seat portion 131.

  The inclined surface 134 is formed as a surface that is inclined such that the angle formed with the fluid inflow direction F is an acute angle. In other words, the inclined surface 134 is formed as an inclined surface inclined so as to gradually expand in diameter along the fluid inflow direction F (from the fluid inlet 11 toward the fluid outlet 14). The inclined surface 134 is formed as an outer peripheral surface among the surfaces forming the second valve seat portion 132. Further, the inclined surface 134 is arranged along the outer periphery of the vertical surface 133. In the present embodiment, the inclined surface 134 is disposed so as to form a step with respect to the vertical surface 133, and is disposed closer to the fluid outlet 14 than the vertical surface 133.

The valve body 20 includes a first valve body 21, a second valve body 22, and a hinge part 30.
The first valve body 21 is inelastic in order to keep the mechanical strength of the valve body 20 against contact with the valve seat portion 13 due to the back pressure of the fluid (pressure from the fluid outlet 14 side to the fluid inlet 11 side). It is formed with a predetermined hardness by a material (for example, a metal such as stainless steel). Further, the first valve body 21 has substantially the same thickness as the step between the first valve seat portion 131 and the vertical surface 133 of the second valve seat portion 132. The first valve body 21 is larger than the inner diameter of the first valve seat portion 131 (the diameter of the inlet of the valve chamber 12) so that the first valve seat portion 131 can be in close contact with the first valve seat portion 131, and the outer diameter of the first valve seat portion 131. It is formed in a disk shape having a diameter of the following size. The first valve body 21 is fixed to the shaft member 43 while the center position is inserted through the shaft member 43.

  Thereby, the 1st valve body 21 is arrange | positioned so that a movement with the shaft member 43 along the inflow direction F of the fluid is possible. The first valve body 21 is disposed in the valve chamber 12 such that the radial direction is perpendicular to the fluid inflow direction F. That is, the first valve body 21 is disposed so that the surface on the fluid inlet 11 side is substantially parallel to the first valve seat 131 and is opposed to the first valve seat 131. The first valve body 21 constitutes a first seal portion 210 that is in close contact with the first valve seat portion 131.

  The 2nd valve body 22 is formed in the truncated cone shape with which the surface of the lower bottom side was dented by elastic materials (for example, synthetic rubbers, such as a fluorine rubber and a silicone rubber). The second valve body 22 is arranged such that the upper bottom formed with a shorter diameter than the lower bottom overlaps the surface of the first valve body 21 on the fluid outlet 14 side. The diameter of the upper bottom of the second valve body 22 is larger than the diameter of the first valve body 21 and the inner diameter of the vertical surface 133 of the second valve seat portion 132, and is larger than the outer diameter of the vertical surface 133 of the second valve seat portion 132. Is also formed small. The side surface of the second valve body 22 is formed in accordance with the inclination angle of the inclined surface 134 of the second valve seat portion 132. The second valve body 22 is fixed to the shaft member 43 while the center position is inserted through the shaft member 43. Thereby, the 2nd valve body 22 is arrange | positioned so that a movement with the shaft member 43 along the inflow direction F of the fluid is possible. The second valve body 22 constitutes a second seal portion 220 that is in close contact with the second valve seat portion 132.

  The second seal portion 220 is formed at a position in the second valve seat portion 132 that does not overlap the first valve body 21 (first seal portion 210) in the fluid inflow direction F. That is, the second seal portion 220 is formed by a portion of the second valve body 22 that is disposed on the outer peripheral side of the first valve body 21. The thickness of the second seal portion 220 is formed so as to gradually decrease toward the outer peripheral side (see FIGS. 7 to 9). The second seal part 220 is flexible so that it can be brought into close contact with the second valve seat part 132 by being bent by pressure (back pressure) applied from the fluid outlet 14 side to the fluid inlet 11 side. The second seal part 220 includes a vertical seal part 221 and an inclined seal part 222.

  The vertical seal portion 221 is disposed along the outer periphery of the first valve body 21. Specifically, the vertical seal portion 221 is formed in an annular shape in which the upper surface of the second valve body 22 exposed from the first valve body 21 is a vertical surface H. The vertical surface H of the vertical seal portion 221 is disposed to face the vertical surface 133 of the second valve seat portion 132. Further, the vertical seal portion 221 is formed to be the thickest of the second seal portions 220.

  The inclined seal part 222 is formed along the outer periphery of the vertical seal part 221. That is, the inclined seal part 222 is formed in an annular shape having the side surface of the second valve body 22 as the inclined surface S. The inclined surface S of the inclined seal portion 222 is disposed to face the inclined surface 134 of the second valve seat portion 132. In the present embodiment, the inclined seal portion 222 is formed to extend radially outward from the side surface of the vertical seal portion 221, and is formed so as to be gradually thinner along the extending direction. That is, the thickness of the inclined seal portion 222 is formed so as to gradually decrease toward the outer peripheral side.

  The hinge portion 30 is disposed at the position of the second seal portion 220 and serves as a starting point for bending of the second seal portion 220. Specifically, the hinge portion 30 is formed as a groove cut out from the surface of the second seal portion 220 along the fluid flow direction (inflow direction F or the opposite direction). The hinge part 30 includes a first hinge part 310 and a second hinge part 320.

  The first hinge part 310 is formed as a groove cut out from the upper bottom of the second valve body 22. The first hinge portion 310 is formed in an annular shape along the outer periphery of the first valve body 21 (first seal portion 210). That is, the first hinge portion 310 is formed in an annular shape along the outer periphery of the first valve body 21 (first seal portion 210) as a groove cut out from the vertical surface H of the vertical seal portion 221.

  The second hinge part 320 is formed as a groove cut out from the lower bottom of the second valve body 22. The second hinge part 320 is formed in an annular shape along the outer periphery of the vertical seal part 221. That is, the second hinge part 320 is formed in an annular shape along the outer periphery of the vertical seal part 221 as a groove cut out from the surface of the inclined seal part 222 on the fluid outlet 14 side.

  According to the valve body 20, the valve seat portion 13, and the hinge portion 30 as described above, the inlet of the valve chamber 12 can be sealed by the first seal portion 210 being in close contact with the first valve seat portion 131. it can. In addition, since the second seal portion 220 is in close contact with the second valve seat portion 132, the inlet of the valve chamber 12 can be further sealed.

  Here, since the first hinge part 310 is provided, the vertical seal part 221 and the inclined seal part 222 can be easily bent starting from the first hinge part 310. Further, since the second hinge part 320 is provided, the inclined seal part 222 can be more easily bent. Further, the inclined surfaces 134 of the inclined seal part 222 and the second valve seat part 132 are formed to be inclined at an acute angle with respect to the fluid inflow direction F, so that they are formed vertically from the viewpoint of pressure loss. The flow of fluid can be made smoother than in the case.

The filter-equipped valve 1 as described above is used as follows.
First, the fluid inlet 11 of the casing 10 (first casing 111) is connected to a primary side pipe (not shown). And the fluid outlet 14 of the casing 10 (2nd casing 112) is connected to secondary side piping (not shown).

  When no fluid flows between the primary side pipe (not shown) and the secondary side pipe (not shown), the fluid inside the valve with filter 1 also does not move. At this time, the valve body 20 is brought into close contact with the valve seat portion 13 by urging by the urging portion 40. Specifically, the elastic member 42 urges the valve body 20 from the fluid outlet 14 side to the fluid inlet 11 side, so that the first seal portion 210 is in close contact with the first valve seat portion 131. Further, the vertical seal portion 221 (vertical surface H) of the second seal portion 220 is in close contact with the vertical surface 133 of the second valve seat portion 132. The inclined seal portion 222 (inclined surface S) of the second seal portion 220 is in close contact with the inclined surface 134 of the second valve seat portion 132. As a result, the inlet of the valve chamber 12 is sealed, so that no fluid movement occurs between the fluid inlet 11 side and the fluid outlet 14 side.

  When inflow of fluid from the fluid inlet 11 side (primary side) to the fluid outlet 14 side (secondary side) is started, the valve body 20 will move from the fluid inlet 11 side to the fluid outlet 14 side by the pressure of the fluid. Receive the power to. That is, the valve body 20 receives a force to move in a direction against the pressure of the urging portion 40 due to the pressure of the fluid. The elastic member 42 contracts due to the force of the valve body 20 to move, and the valve body 20 and the plate-like body 41 move together with the shaft member 43 along the fluid inflow direction F in a direction away from the valve seat portion 13. To do. As a result, the first seal portion 210 is separated from the first valve seat portion 131. Further, the vertical seal portion 221 and the inclined seal portion 222 of the second seal portion 220 are separated from the vertical surface 133 and the inclined surface 134 of the second valve seat portion 132. Therefore, the seal between the valve seat 13 and the valve body 20 is released, and the fluid can flow from the fluid inlet 11 side to the fluid outlet 14 side.

  On the other hand, when the fluid tries to flow backward from the fluid outlet 14 side to the fluid inlet 11 side, the valve body 20 and the plate-like body 41 try to move from the fluid outlet 14 side to the fluid inlet 11 side by the pressure (back pressure) of the fluid. Receive the power to do. Further, the valve body 20 and the plate-like body 41 receive a force to move from the fluid outlet 14 side to the fluid inlet 11 side by the biasing force of the biasing portion 40. Accordingly, the valve body 20 and the plate-like body 41 start moving toward the valve seat portion 13 along the fluid inflow direction F together with the shaft member 43.

  At this time, the plate-like body 41 transmits the urging force of the elastic member 42 to the entire surface of the second seal portion 220 on the fluid outlet 14 side. Thereby, when the 2nd seal | sticker part 220 moves to the direction approaching the 2nd valve seat part 132, it prevents bending from the fluid inlet 11 side to the fluid outlet 14 side.

  When the fluid in the valve chamber 12 enters between the second seal part 220 and the plate-like body 41, the second seal part 220 is moved from the fluid outlet 14 side by the pressure applied from the fluid outlet 14 side to the fluid inlet 11 side. Deflection toward the fluid inlet 11 side. That is, the vertical seal portion 221 bends toward the vertical surface 133 of the second valve seat portion 132, and the inclined seal portion 222 bends toward the inclined surface 134 of the second valve seat portion 132. At this time, the first hinge portion 310 serves as a starting point for bending of the vertical seal portion 221 and the inclined seal portion 222, and the second hinge portion 320 serves as a starting point for bending of the inclined seal portion 222.

  Therefore, when the valve body 20 moves toward the valve seat portion 13, the seal by the second seal portion 220 is started before the seal by the first seal portion 210. The seal by the second seal part 220 is in close contact with the inclined surface 134 from the front end (outer peripheral side) of the inclined seal part 222 in the extending direction. Then, after the root portion of the inclined seal portion 222 is in close contact with the inclined surface 134, the vertical seal portion 221 is in close contact with the vertical surface 133. That is, the sealing by the valve body 20 is sequentially performed from the fluid outlet 14 side to the fluid inlet 11 side.

  Thereby, it is possible to prevent a high-pressure fluid (fluid having a pressure on the fluid outlet 14 side) from remaining between the valve body 20 and the wall surface on the fluid inlet 11 side of the valve chamber 12. Therefore, it can prevent that the valve body 20 receives a pressure from the remaining fluid, and the valve body 20 leaves | separates from the valve seat part 13 unintentionally. Furthermore, since the second seal portion 220 starts sealing before the first seal portion 210, it is possible to prevent the first seal portion 210 from coming into contact with the first valve seat portion 131 vigorously.

  Finally, the first seal portion 210 is in close contact with the first valve seat portion 131 by the biasing force of the elastic member 42 and the pressure of the fluid from the fluid outlet 14 side to the fluid inlet 11 side. Further, the second seal portion 220 is in close contact with the second valve seat portion 132 by the biasing force of the elastic member 42 and the bending due to the fluid pressure from the fluid outlet 14 side to the fluid inlet 11 side. As described above, the valve body 20 is brought into close contact with the valve seat portion 13, whereby the inlet of the valve chamber 12 is sealed, so that the backflow of fluid from the fluid outlet 14 side to the fluid inlet 11 side is prevented.

  By the way, the filter 60 prevents foreign matters having a predetermined size or more from entering the positions of the valve body 20 and the valve seat portion 13 by capturing foreign matters mixed in the fluid flowing from the primary side to the secondary side. On the other hand, when a foreign matter having a size less than a predetermined size that has passed through the filter 60 enters between the valve body 20 and the valve seat portion 13, the valve body 20 is configured as follows to prevent backflow of fluid. Operate.

  First, as shown in FIG. 7, when foreign matter D enters between the first seal portion 210 and the first valve seat portion 131, the first seal portion 210 formed of an inelastic material is Since the foreign matter D is bitten with the portion 131, it cannot be brought into close contact with the first valve seat portion 131. For this reason, the first seal portion 210 cannot seal the fluid inlet 11 of the valve chamber 12. The second seal portion 220 cannot move to the second valve seat portion 132 because the first seal portion 210 cannot be in close contact with the first valve seat portion 131. At this time, since the pressure in the valve chamber 12 is larger than the pressure on the fluid inlet 11 side of the casing 10, the fluid tends to flow backward from the valve chamber 12 to the fluid inlet 11 side of the casing 10.

  The fluid to be counterflowed enters between the plate-like body 41 and the second seal portion 220. Then, the second seal part 220 formed of an elastic material is bent by the pressure applied from the fluid outlet 14 side to the fluid inlet 11 side and the elastic force of the elastic member 42 and is in close contact with the second valve seat part 132. That is, the vertical seal portion 221 is bent toward the fluid inlet 11 with the first hinge portion 310 as a starting point, so that the vertical surface H comes into close contact with the vertical surface 133 of the second valve seat portion 132. Further, the inclined seal portion 222 is bent toward the fluid inlet 11 with the second hinge portion 320 as a starting point, so that the inclined surface S comes into close contact with the inclined surface 134 of the second valve seat portion 132.

  At this time, the hinge part 30 becomes a starting point of bending, so that the second seal part 220 can be easily bent. Further, the second seal portion 220 can be easily bent by being formed so that the thickness of the second seal portion 220 gradually decreases toward the outer peripheral side. Thereby, the valve body 20 can seal the fluid inlet 11 of the valve chamber 12 in the second seal portion 220 even when the fluid inlet 11 of the valve chamber 12 cannot be sealed in the first seal portion 210, The backflow of fluid can be prevented.

  As shown in FIG. 8, when the foreign matter D enters between the vertical surface H of the vertical seal portion 221 and the vertical surface 133 of the second valve seat portion 132, the vertical seal portion 221 has the urging force of the elastic member 42. The foreign material D is deformed so as to be wrapped by the pressure applied from the fluid outlet 14 side to the fluid inlet 11 side. As a result, the vertical seal portion 221 can move to the vertical surface 133 of the second valve seat portion 132 and be brought into close contact therewith. Further, the first seal portion 210 can be in close contact with the first valve seat portion 131. Further, the inclined seal portion 222 can be in close contact with the inclined surface 134 of the second valve seat portion 132. Accordingly, the inlet of the valve chamber 12 can be sealed by the first seal portion 210 and the second seal portion 220.

  If the first seal portion 210 cannot be brought into close contact with the first valve seat portion 131 due to the deformation of the vertical seal portion 221, the vertical seal portion 221 bends with the foreign matter D as a fulcrum, thereby causing the second valve seat portion 132 to bend. It adheres closely to the vertical surface 133. Further, the inclined seal portion 222 is brought into close contact with the inclined surface 134 of the second valve seat portion by being bent by the pressure of the fluid to be counter-flowed. Thereby, the inlet of the valve chamber 12 can be sealed in the second seal portion 220, and the backflow of fluid can be prevented.

  Next, as shown in FIG. 9, when the foreign matter D enters between the inclined seal part 222 and the inclined surface 134 of the second valve seat part 132, the inclined seal part 222 moves from the fluid outlet 14 side to the fluid inlet 11 side. It deform | transforms so that the foreign material D may be wrapped with the pressure concerning. Thereby, the inclination seal part 222 can move to the inclined surface 134 of the 2nd valve seat part 132, and can contact | adhere. That is, the first seal portion 210 can be in close contact with the first valve seat portion 131. Further, the inclined seal portion 222 can be in close contact with the inclined surface 134 of the second valve seat portion 132. Accordingly, the inlet of the valve chamber 12 can be sealed by the first seal portion 210 and the second seal portion 220.

  In addition, when the 1st seal part 210 cannot closely_contact | adhere to the 1st valve seat part 131 by deformation | transformation of the inclination seal part 222, the inclination seal part 222 is the pressure (back pressure) applied from the fluid outlet 14 side to the fluid inlet 11 side. Thus, the second hinge part 320 is bent as a starting point, thereby closely contacting the inclined surface 134 of the second valve seat part 132. Further, the tip side of the inclined seal portion 222 is in close contact with the inclined surface 134 with the foreign matter D as a fulcrum. The vertical seal portion 221 bends with the first hinge portion 310 as a starting point due to pressure (back pressure) applied from the fluid outlet 14 side to the fluid inlet 11 side. The vertical seal portion 221 is in close contact with the vertical surface 133 of the second valve seat portion 132. Thereby, the inlet of the valve chamber 12 can be sealed in the second seal portion 220, and the backflow of fluid can be prevented.

According to the filter-equipped valve 1 of the embodiment described above, the following effects can be obtained.
(1) The valve with filter 1 includes a receiving surface portion 611 disposed substantially perpendicular to the fluid flow direction and a side surface portion 612 extending from the outer periphery of the receiving surface portion 611 in the direction along the fluid flow direction. And these receiving surface part 611 and side part 612 were comprised by the member which has a some through-hole. Accordingly, the fluid can be introduced not only from the receiving surface portion 611 perpendicular to the fluid flow direction F but also from the side surface portion 612 that extends in the direction along the fluid flow direction F and is not easily blocked by the foreign matter D. Therefore, the valve 1 with a filter which prevents the malfunction of the valve | bulb by the foreign material D approaching to the valve body 20 side, and the filter 60 cannot obstruct | occlude easily is realizable.

(2) A notch or a gap through which fluid can flow is formed in the rib portion 62 and the portion L of the casing 10 that supports the rib portion 62. Accordingly, a part of the fluid flowing on the outer peripheral side of the side surface portion 612 can be introduced from the side surface portion 612 and a part thereof can be guided to the rib portion 62. Therefore, the pressure loss can be reduced by arranging the filter 60. Further, the side surface portion 612 is hardly blocked by the foreign matter D, and the filter 60 can be hardly blocked.

(3) The receiving surface portion 611 is configured to include a recess 614 that is recessed in the fluid flow direction. Thereby, the strength of the receiving surface portion 611 can be improved as compared with the case where the receiving surface portion 611 is formed only by a surface perpendicular to the fluid inflow direction F.

(4) The valve with filter 1 includes the urging portion 40 that urges the valve body 20 toward the valve seat portion 13. Thereby, the backflow of the fluid from a secondary side to a primary side can be prevented because the urging | biasing part 40 urges | biases and closely_contact | adheres the valve body 20 to the valve seat part 13 side.

(5) The filter main body 61 is configured to include a flange portion 613 formed to extend from the distal end side of the side surface portion 612 in a direction substantially perpendicular to the fluid flow direction F. The rib portion 62 includes an annular plate member 621 in which cuts d are formed on the outer periphery at predetermined intervals, and the outer peripheral side of the plate member 621 is bent so as to sandwich the flange portion 613. Thereby, since the collar part 613 equivalent to the terminal of the filter main body 61 can be protected by the plate member 621, damage to the filter 60 can be prevented and the shape of the filter 60 can be suitably maintained.

  As mentioned above, although each preferred embodiment of the valve with a filter of the present invention was described, the present invention is not limited to the above-mentioned embodiment, and can be changed suitably.

  For example, as shown in FIG. 10, a plurality of hinge portions 30 may be provided on the surface of the second seal portion 220 on the fluid inlet 11 side. Thereby, the 2nd seal | sticker part 220 can be made into the structure which is easier to bend.

  In the above embodiment, the filter main body 61 is formed as a mesh-like metal net formed by knitting metal wires, but is not limited thereto. For example, the filter body 61 may be made of a punching metal or a resin molded product.

DESCRIPTION OF SYMBOLS 1 Valve with filter 10 Casing 11 Fluid inlet 12 Valve chamber 13 Valve seat part 14 Fluid outlet 20 Valve body 40 Energizing part 60 Filter 61 Filter main body 62 Rib part 611 Receiving surface part 612 Side face part 613 Gutter part 614 Recessed part 621 Plate member d Cutting F Inflow direction L The part that supports the rib

Claims (5)

A casing formed with a fluid inlet, a valve chamber, a valve seat, and a fluid outlet;
A valve body disposed in the valve chamber;
A filter disposed on the fluid inlet side of the casing, and a valve with a filter,
The filter is
A receiving surface portion disposed substantially perpendicular to the fluid flow direction; and a side surface portion extending in a direction along the fluid flow direction from an outer periphery of the receiving surface portion, and the receiving surface portion and the side surface portion have a plurality of openings. A filter body formed with,
And a rib portion extending in a direction substantially perpendicular to the fluid flow direction from the front end side of the side surface portion and supported by the casing.   The valve with filter according to claim 1, wherein a notch or a gap through which a fluid can flow is formed in a portion of the rib portion and the casing that supports the rib portion.   The valve with a filter according to claim 1 or 2, wherein the receiving surface portion has a concave portion recessed in a fluid flow direction.   The valve with a filter according to claim 1, further comprising an urging portion that urges the valve body toward the valve seat portion. The filter body is
And further comprising a flange formed to extend in a direction substantially perpendicular to the fluid flow direction from the front end side of the side part,
The rib portion includes an annular plate member having cuts formed at predetermined intervals on the outer periphery, and is formed by bending the outer peripheral side of the plate member so as to sandwich the flange portion. A valve with a filter as described in 1.

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