JP4978320B2 - Valve and valve structure - Google Patents

Description

  The present invention relates to a valve having an umbrella-shaped valve body and a valve structure.

  Conventionally, a valve in which a valve body has an umbrella shape is known (see Patent Documents 1 and 2). Such a conventional valve will be described with reference to FIGS. 9 and 10 are schematic cross-sectional views showing a state where a valve according to a conventional example is used.

  The valves 100 and 150 are attached to a partition wall 200 that separates one region K1 and the other region K2, and pressure in one region K1 (more specifically, a pressure difference between the one region K1 and the other region K2). When the pressure exceeds the set pressure, the valve body is opened, the pressure in one region K1 is released to the other region K2, and the valve body is closed again when the pressure decreases.

  First, the valve 100 shown in FIG. 9 will be described. The valve 100 includes a shaft portion 101 that is attached to an attachment hole 201 provided in the partition wall 200, and an umbrella-shaped valve body 102. The partition wall 200 is provided with a plurality of pressure relief holes 202 at regular intervals around the mounting hole 201.

  When the valve 100 is used, in the normal state, the pressure in the other region K2 is higher than that in the one region K1, and the majority of the valve body 102 is on the surface of the partition wall 200 as shown in FIG. It will be in close contact. Thereby, each opening part of the some pressure relief hole 202 will be in the state obstruct | occluded by the valve body 102, respectively, and it will be in the state interrupted | blocked between the one area | region K1 and the other area | region K2.

  When the pressure in one region K1 increases due to some influence and the pressure exceeds a set pressure (at least larger than the pressure in the other region K2), the outer peripheral portion of the valve body 102 is turned up. (In FIG. 9, the outer peripheral end is deformed in the direction of arrow M). As a result, the one region K1 and the other region K2 communicate with each other through the pressure relief hole 202, and the pressure in the one region K1 escapes to the other region K2.

  When the pressure in one region K1 decreases, the valve element 102 again enters the state shown in FIG. 9, and the region K1 and the other region K2 are blocked.

  Thus, by providing the valve 100, it is possible to prevent the pressure in the one region K1 from becoming higher than the set pressure.

  Next, the valve 150 shown in FIG. 10 will be described. Similarly to the valve 100 shown in FIG. 9, the valve 150 also includes a shaft portion 151 and an umbrella-shaped valve body 152. In the case of the valve 150, the valve body 152 is provided with a plurality of convex portions 153. These convex portions 153 are respectively provided at positions facing the plurality of pressure relief holes 202 provided in the partition wall 200. Thereby, in a state where the valve body 152 is closed, the plurality of pressure relief holes 202 are in a state in which the opening portions are respectively closed by the convex portions 153 provided at positions facing the pressure relief holes 202.

  The valve 150 shown in FIG. 10 also exhibits the same function as the valve 100 shown in FIG. 9, and the portion that closes the pressure relief hole 202 is constituted by the convex portion 153. Therefore, the valve 150 shown in FIG. And durability can be increased.

  As described above, in the case of the valve according to the conventional example, when the valve body is closed, the opening of the pressure relief hole provided in the partition wall is completely closed by the valve body. Therefore, there is a possibility that the valve body sticks to the partition wall due to liquid or the like adhering to the surface of the valve body, and sticks in a state where the valve body is adsorbed on the entire periphery of the opening edge. In particular, when the adhesiveness of the liquid (for example, fuel) existing in one region K1 or the other region K2 is high, there is a risk that the adhesive force when the valve body sticks to the partition wall becomes considerably high. .

Therefore, even if the pressure in one region K1 exceeds the set pressure, the valve body may not open, or the response time until the valve body opens may become long.
Japanese Utility Model Publication No. 22-24475 JP-A-10-325474

  The objective of this invention is providing the valve and valve structure which aimed at the improvement of the response at the time of a valve body opening.

  The present invention employs the following means in order to solve the above problems.

That is, the valve of the present invention is
It is attached to the part of the pressure relief hole provided in the partition that separates one region from the other region, and when the pressure difference between one region and the other region increases, the valve body opens and the pressure in one region is reduced to the other region. In the valve that escapes to the area and the valve body closes when the differential pressure decreases,
A shaft portion attached to an attachment hole provided in the partition;
It is arranged on the other region side, and is in close contact with the position surrounding all of the at least one pressure relief hole provided around the mounting hole on the surface of the partition wall, so that the space between one region and the other region is between An umbrella-shaped valve body to block,
With
A convex portion that protrudes toward the partition wall surface is provided on the surface of the valve body that faces the partition wall, and the convex portion is the entire opening of the pressure relief hole when the valve body is closed. Is provided at a position that partially passes over the opening without blocking the protrusion, and even if the valve body is in contact with the surface of the partition wall, the protrusion is in contact with the surface of the partition wall. It is comprised so that a clearance gap may be formed in the both sides of this.

  According to the present invention, the valve body is provided with a convex portion at a position that partially passes over the opening without closing the entire opening of the pressure relief hole when the valve body is closed. Therefore, in the state where the valve body is closed, a gap is formed on both sides of the convex portion at the edge portion of the opening. Thereby, it can prevent that a valve body sticks over the perimeter of an opening part edge. And in the state which the valve body closed, the space area | region from the pressure relief hole to the part between a valve body and the partition surface can be formed through this clearance gap. Therefore, the fluid in one region enters the region between the valve body and the partition wall surface. Thereby, the valve body receives the pressure of one region not only on the portion facing the pressure relief hole but also on the portion facing the partition wall surface. Further, when the pressure in one region increases, a so-called “wedge effect” is exhibited in which the fluid in one region enters a narrower gap between the valve body and the partition wall surface.

  The convex portion is an annular convex portion provided so as to surround the shaft portion, and the annular convex portion is provided at a position partially passing over the openings of all the pressure relief holes. Good.

  Thereby, even in a state in which the valve body is closed, a gap leading to the pressure relief hole can be formed over the entire circumference around the shaft portion.

  The annular convex portion may be provided concentrically with the shaft portion.

  As a result, the position where the convex portion passes over the opening of the pressure relief hole can be made the same regardless of the position in the rotational direction when the valve is attached.

  A cross-sectional shape perpendicular to the longitudinal direction of the convex portion may be a semicircular shape.

  Thereby, in the state which the valve body closed, since the area which a convex part touches a partition surface can be made small, the clearance gap formed in the both sides of a convex part can be enlarged.

  The surface of the valve body on the side facing the partition wall may be subjected to a satin finish treatment.

  Thereby, the adhesive force with respect to the partition of a valve body can be reduced.

The valve structure of the present invention is
A partition wall that separates one region from the other region and has a pressure relief hole for releasing pressure from one region to the other region;
A valve structure that is attached to the pressure relief hole and has a valve that opens when the pressure difference between one region and the other region increases and releases the pressure, and closes the valve when the differential pressure decreases. In
The partition is
A mounting hole for mounting the valve;
At least one pressure relief hole provided around the mounting hole;
With
The valve is
A shaft portion attached to the attachment hole;
An umbrella-shaped valve body that is disposed on the other region side and is in close contact with a position surrounding all of the pressure relief holes on the surface of the partition wall to block between one region and the other region;
With
A convex portion protruding toward the partition wall surface is provided on the surface of the valve body that faces the partition wall, and the convex portion is located on the opening portion without blocking the entire opening portion of the pressure relief hole. Even when the valve body is in contact with the partition wall surface, the projections are in contact with the partition wall surface so that gaps are formed on both sides of the projection. It is comprised as follows.

  According to the present invention, the valve body is provided with a convex portion at a position that partially passes over the opening without closing the entire opening of the pressure relief hole when the valve body is closed. Therefore, in the state where the valve body is closed, a gap is formed on both sides of the convex portion at the edge portion of the opening. Thereby, it can prevent that a valve body sticks over the perimeter of an opening part edge. And in the state which the valve body closed, the space area | region from the pressure relief hole to the part between a valve body and the partition surface can be formed through this clearance gap. Therefore, the fluid in one region enters the region between the valve body and the partition wall surface. Thereby, the valve body receives the pressure of one region not only on the portion facing the pressure relief hole but also on the portion facing the partition wall surface. Further, when the pressure in one region increases, a so-called “wedge effect” is exhibited in which the fluid in one region enters a narrower gap between the valve body and the partition wall surface.

  In addition, said each structure can be employ | adopted combining as much as possible.

  As described above, according to the present invention, the responsiveness when the valve body is opened can be improved.

  The best mode for carrying out the present invention will be exemplarily described in detail below with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to those unless otherwise specified. .

(Example)
With reference to FIGS. 1-8, the valve | bulb and valve structure which concern on the Example of this invention are demonstrated.

<Valve>
With reference to FIGS. 1-3, the structure of the valve | bulb which concerns on the Example of this invention is demonstrated. FIG. 1 is a plan view of a valve according to an embodiment of the present invention. FIG. 2 is a bottom view of the valve according to the embodiment of the present invention. FIG. 3 is a sectional view of a valve according to an embodiment of the present invention. 3 is a cross-sectional view taken along the line AA in FIG. 1 and a cross-sectional view taken along the line BB in FIG.

  The valve 10 according to the present embodiment includes a shaft portion 11 and an umbrella-shaped valve body 14 provided on one end side of the shaft portion 11. The valve 10 is made of a rubber-like elastic body, and the shaft portion 11 and the valve body 14 are integrated.

  A large-diameter portion 12 having a larger diameter than the body portion (center portion) of the shaft portion 11 is provided on the distal end side of the shaft portion 11. Further, on the base side of the shaft portion 11, a contact surface 13 is provided that contacts the partition wall to which the valve 10 is attached and holds the posture of the valve 10.

  And the valve body 14 is comprised so that when the valve | bulb 10 is attached to a partition, the surface of the side facing a partition functions as the sealing surface 14a. The seal surface 14a is subjected to a satin finish treatment.

  An annular convex portion 15 that projects toward the partition wall surface is provided on the seal surface 14 a side of the valve body 14. The annular convex portion 15 is provided concentrically with the shaft portion 11 so as to surround the shaft portion 11. Moreover, the cross-sectional shape perpendicular | vertical to the longitudinal direction in the cyclic | annular convex part 15 is a semicircle as shown in FIG.

<Partition wall>
With reference to FIG. 4, the partition in which the valve | bulb which concerns on a present Example is attached is demonstrated. FIG. 4 is a partial plan view of a partition wall according to an embodiment of the present invention.

  The partition wall 20 is provided to separate one region from the other region. Specific examples of the partition wall 20 include a tank case or cover for storing liquid and gas, and a pipe through which the liquid and gas pass.

  The partition wall 20 is provided with an attachment hole 21 for attaching the valve 10 and a plurality of (three in this embodiment) pressure relief holes 22 provided around the attachment hole 21. In the present embodiment, the three pressure relief holes 22 are all configured with the same size and shape, and are all provided at equal distances from the mounting hole 21 so that the intervals are equal. ing.

<Valve structure>
In particular, a valve structure according to an embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a schematic cross-sectional view showing a state in which the valve according to the embodiment of the present invention is attached to the partition wall (a state where no external force is acting). 5 corresponds to the AA sectional view in FIG. 1 and corresponds to the BB sectional view in FIG. 2 (the same applies to FIGS. 6 and 8). 5 corresponds to the CC cross-sectional view in FIG. 4 (the same applies to FIGS. 6 and 8).

  FIG. 6 is a schematic cross-sectional view showing a state (normal state) in which the valve according to the embodiment of the present invention is used. FIG. 7 is an enlarged sectional view showing a state (normal state) in which the valve according to the embodiment of the present invention is used. 7 corresponds to the DD cross-sectional view in FIG. FIG. 8 is a schematic cross-sectional view showing a state in which the valve according to the embodiment of the present invention is used (a state in which pressure is released).

<< When not in use >>
FIG. 5 shows a state in which the valve 10 is attached to the partition wall 20 and no external force is applied. The valve 10 can be easily attached by inserting the shaft portion 11 into the attachment hole 21 provided in the partition wall 20 from the other region K2 side. The outer diameter of the body portion of the shaft portion 11 is set to be the same as or slightly smaller than the inner diameter of the mounting hole 21, whereas the large diameter portion 12 at the tip of the shaft portion 11 is set to be larger than the inner diameter of the mounting hole 21. ing. Therefore, when the tip of the shaft portion 11 is inserted into the attachment hole 21, the large diameter portion 12 is reduced in diameter by elastic deformation in the process of passing through the attachment hole 21, and returns to its original shape elastically when passing through the attachment hole 21. Thereby, since the part of the large diameter part 12 functions as prevention, it is possible to attach the valve 10 to the partition wall 20.

  In a state where no external force is applied to the valve 10, the umbrella-shaped valve body 14 is in contact with the surface of the partition wall 20 only around the outer peripheral edge.

<< In use (normal state) >>
6 and 7 show a state in which the valve 10 is attached to the partition wall 20 and used in a normal state. In a normal state, the pressure in the other region K2 is higher than that in the one region K1. As a specific example, there can be mentioned a case where one region K1 is inside a tank in a negative pressure state and the other region K2 is air.

  In the normal state, the valve body 14 is in a closed state. That is, since the pressure in the other region K2 is higher than that in the one region K1, the valve body 14 is deformed so that most of the seal surface 14a of the valve body 14 is in close contact with the surface of the partition wall 20. . At this time, the contact surface 13 comes into close contact with the periphery of the opening edge of the mounting hole 21 in the partition wall 20, and the posture of the valve 10 is stably maintained.

  Further, the sealing surface 14a of the valve body 14 is in close contact with a position surrounding all three pressure relief holes 22 in the surface of the partition wall 20 (an annular region outside the three pressure relief holes 22 when viewed from the mounting holes 21). To do. Thereby, the area between one area K1 and the other area K2 is blocked. Accordingly, it is possible to prevent the fluid in one region K1 from leaking into the other region K2 and the fluid in the other region K2 from entering the one region K2. Thus, the valve 10 exhibits a function as a check valve that prevents the fluid in the other region K2 from entering the one region K1.

  And as above-mentioned, in the valve | bulb 10 which concerns on a present Example, the cyclic | annular convex part 15 which protrudes toward the surface of the partition 20 is provided in the seal surface 14a side of the valve body 14. FIG. In a state where the valve body 14 is closed, the annular convex portion 15 is provided at a position that partially passes over the opening without blocking the entire opening of the pressure relief hole 22. In FIG. 4, a portion indicated by a dotted line T is a portion where the convex portion 15 is located with respect to the surface of the partition wall 20. As illustrated, the annular protrusions 15 are provided at positions that partially pass over the openings of all the pressure relief holes 22.

  Thus, in the valve 10 according to the present embodiment, since the convex portion 15 is provided on the seal surface 14a side of the valve body 14, the gap is formed on both sides of the convex portion 15 even when the valve body 14 is closed. S is formed. And since this convex part 15 passes partially on an opening part, without closing the whole opening part of the pressure relief hole 22 in the state which the valve body 14 closed, it is in the opening part edge of the pressure relief hole 22 There is always a location where the convex portion 15 is in contact.

  Therefore, in the state where the valve body 14 is closed, a gap S is formed on both sides of the convex portion 15 at the opening edge portion of the pressure relief hole. Therefore, in a state where the valve body 14 is closed, a space region extending from the pressure relief hole 22 to a portion between the valve body 14 and the surface of the partition wall 20 can be formed through the gap S (an arrow in FIG. 7). R1).

  It should be noted that the annular convex portion 15 is in a deepened position on the side opposite to the tip of the shaft portion 11 with respect to the outer peripheral edge of the valve body 14 in a state where no external force is applied, and the outer peripheral edge. It is in the position away from the center side of shaft part 11. Therefore, even if the clearance S is formed on both sides of the convex portion 15 when the valve body 14 is closed, the sealing performance by the sealing surface 14a is not adversely affected.

<< When in use (pressure is released) >>
FIG. 8 shows a state where the valve 10 is attached to the partition wall 20 and used, and the pressure is released. When the pressure in one region K1 becomes high due to some influence and the pressure exceeds a set pressure (at least larger than the pressure in the other region K2), as shown in FIG. Deforms so that the part turns up. Thus, the one region K1 and the other region K2 communicate with each other through the pressure relief hole 22, and the pressure in the one region K1 escapes to the other region K2 (see arrow R2 in FIG. 8). Thus, when the pressure in one region K1 increases, the valve 10 functions as a safety valve that releases the pressure to the other region K2. If the pressure in one region K1 is reduced, the elastic restoring force of the valve 10 itself and the differential pressure of the other region K2 with respect to the one region K1 increase, so that the valve 10 again in FIGS. Return to the state shown.

<Excellent points of this embodiment>
According to the valve and the valve structure according to the present embodiment, the valve body 14 is located at a position where the valve body 14 partially passes over the opening without closing the entire opening of the pressure relief hole 22 when the valve body 14 is closed. A convex portion 15 is provided. Therefore, in a state where the valve body 14 is closed, a gap S is formed on both sides of the convex portion 15 in the edge portion of the opening. Therefore, it can prevent that the valve body 14 adheres over the perimeter of an opening part edge.

  Further, when the valve body 14 is closed, a space region extending from the pressure relief hole 22 to a portion between the valve body 14 and the surface of the partition wall 20 can be formed through the gap S. Therefore, the fluid in one region K <b> 1 enters the region between the valve body 14 and the surface of the partition wall 20. As a result, the valve body 14 receives the pressure of the one region K1 not only on the portion facing the pressure relief hole 22 but also on the portion facing the surface of the partition wall 20. Further, when the pressure in one region K1 is increased, a so-called “wedge effect” in which the fluid in one region K1 enters a narrower gap between the valve body 14 and the surface of the partition wall 20 is exhibited.

  Thus, it can prevent that the valve body 14 adheres over the perimeter of the opening part edge of the pressure relief hole 22, and it is one area | region also about the part which the valve body 14 opposes the surface of the partition 20 When the pressure of K1 is combined with the wedge effect and the pressure in one region K1 exceeds the set pressure, the valve body 14 is deformed so that its outer peripheral portion is immediately turned up. Therefore, the problem that the valve element 14 does not open even if the pressure in the one region K1 exceeds the set pressure can be solved, and the responsiveness when the valve element 14 opens can be improved.

  In this embodiment, the convex portion 15 is constituted by an annular convex portion 15 provided so as to surround the shaft portion 11, and the annular convex portion 15 is formed on the openings of all the pressure relief holes 22. Each of them is provided at a partially passing position. Therefore, even when the valve body 14 is closed, the gap S that leads to the pressure relief hole 22 can be formed over the entire circumference around the shaft portion 11. Thereby, the responsiveness at the time of the valve body 14 opening can be improved effectively.

  Needless to say, a certain effect can be obtained even when a configuration in which the convex portions 15 are provided in positions corresponding to the respective pressure relief holes 22 without being formed into an annular shape is employed.

  Further, in the present embodiment, a configuration in which the annular convex portion 15 is provided concentrically with the shaft portion 11 is adopted. Thereby, the position where the convex part 15 passes on the opening part of the pressure relief hole 22 can be made into the same position irrespective of the position of the rotation direction when the valve 10 is attached. That is, the valve 10 can be attached to the partition wall 20 without being caught in the rotating direction. Of course, when the configuration in which the rotation direction is positioned when the valve 10 is attached to the partition wall, the configuration in which the convex portion 15 is provided concentrically with the shaft portion 11 does not have to be employed, and it is necessary to provide it in an annular shape. Nor.

  In this embodiment, a configuration in which the cross-sectional shape perpendicular to the longitudinal direction of the convex portion 15 is a semicircular shape is employed. Thereby, in the state which the valve body 14 closed, since the area which the convex part 15 touches the surface of the partition 20 can be made small, the clearance gap S formed in the both sides of the convex part 15 can be enlarged.

  In the present embodiment, the surface of the valve body 14 on the side facing the partition wall 20 is subjected to a satin finish treatment. Thereby, the adhesive force with respect to the partition 20 of the valve body 14 can be reduced. Therefore, the responsiveness when the valve body 14 opens can be effectively improved.

FIG. 1 is a plan view of a valve according to an embodiment of the present invention. FIG. 2 is a bottom view of the valve according to the embodiment of the present invention. FIG. 3 is a sectional view of a valve according to an embodiment of the present invention. FIG. 4 is a partial plan view of a partition wall according to an embodiment of the present invention. FIG. 5 is a schematic cross-sectional view showing a state in which the valve according to the embodiment of the present invention is attached to the partition wall (a state where no external force is acting). FIG. 6 is a schematic cross-sectional view showing a state (normal state) in which the valve according to the embodiment of the present invention is used. FIG. 7 is an enlarged sectional view showing a state (normal state) in which the valve according to the embodiment of the present invention is used. FIG. 8 is a schematic cross-sectional view showing a state in which the valve according to the embodiment of the present invention is used (a state in which pressure is released). FIG. 9 is a schematic cross-sectional view showing a state where a valve according to a conventional example is used. FIG. 10 is a schematic cross-sectional view showing a state where a valve according to a conventional example is used.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Valve | bulb 11 Shaft part 12 Large diameter part 13 Contact surface 14 Valve body 14a Seal surface 15 Convex part 20 Partition 21 Mounting hole 22 Pressure relief hole K1 One area | region K2 The other area | region S Crevice

Claims (6)

It is attached to the part of the pressure relief hole provided in the partition that separates one region from the other region, and when the pressure difference between one region and the other region increases, the valve body opens and the pressure in one region is reduced to the other region. In the valve that escapes to the area and the valve body closes when the differential pressure decreases,
A shaft portion attached to an attachment hole provided in the partition;
It is arranged on the other region side, and is in close contact with the position surrounding all of the at least one pressure relief hole provided around the mounting hole on the surface of the partition wall, so that the space between one region and the other region is between An umbrella-shaped valve body to block,
With
A convex portion that protrudes toward the partition wall surface is provided on the surface of the valve body that faces the partition wall, and the convex portion is the entire opening of the pressure relief hole when the valve body is closed. Is provided at a position that partially passes over the opening without blocking the protrusion, and even if the valve body is in contact with the surface of the partition wall, the protrusion is in contact with the surface of the partition wall. A valve characterized in that a gap is formed on both sides of the valve.   The convex portion is an annular convex portion provided so as to surround the shaft portion, and the annular convex portion is provided at a position partially passing over the openings of all the pressure relief holes. The valve according to claim 1.   The valve according to claim 2, wherein the annular convex portion is provided concentrically with the shaft portion.   The valve according to claim 1, 2, or 3, wherein a cross-sectional shape perpendicular to the longitudinal direction of the convex portion is a semicircular shape.   The valve according to any one of claims 1 to 4, wherein a surface of the valve body facing the partition wall is subjected to a satin finish treatment. A partition wall that separates one region from the other region and has a pressure relief hole for releasing pressure from one region to the other region;
A valve structure that is attached to the pressure relief hole and has a valve that opens when the pressure difference between one region and the other region increases and releases the pressure, and closes the valve when the differential pressure decreases. In
The partition is
A mounting hole for mounting the valve;
At least one pressure relief hole provided around the mounting hole;
With
The valve is
A shaft portion attached to the attachment hole;
An umbrella-shaped valve body that is disposed on the other region side and is in close contact with a position surrounding all of the pressure relief holes on the surface of the partition wall to block between one region and the other region;
With
A convex portion protruding toward the partition wall surface is provided on the surface of the valve body that faces the partition wall, and the convex portion is located on the opening portion without blocking the entire opening portion of the pressure relief hole. Even when the valve body is in contact with the partition wall surface, the projections are in contact with the partition wall surface so that gaps are formed on both sides of the projection. A valve structure characterized by being configured as follows .

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