non-return valve

Abstract

To provide a check valve capable of suppressing floating of a valve body. [Solution] The device comprises a first member 10, a second member 20 facing the first member, and a valve body 30 provided between the first member and the second member, a flow path 18 is formed between the first member and the second member, the flow path is blocked when the valve body comes into contact with the first member, and the flow path is opened when the valve body moves from the first member toward the second member, the second member has a wall 26 that protrudes toward the first member from the surface of the second member facing the first member, and when the valve body moves toward the second member, the wall faces the tip of the valve body.

Description

[Technical Field]

[0001] The present invention relates to a check valve. [Background technology]

[0002] A check valve is sometimes provided in a fluid flow path (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-26108 Summary of the Invention [Problem to be solved by the invention]

[0004] The check valve opens and closes as the valve disc deforms. When the valve is open, the valve disc comes into contact with the stopper, opening the flow path. Turbulence can occur in the fluid. This turbulence generates a force that lifts the valve disc from the stopper. This force can cause the valve disc to vibrate and generate abnormal noise. Therefore, the objective is to provide a check valve that can suppress the valve disc from floating. [Means for solving the problem]

[0005] The above object can be achieved by a valve device comprising a first member, a second member facing the first member, and a valve body provided between the first member and the second member, wherein a flow path is formed between the first member and the second member, the flow path is blocked when the valve body comes into contact with the first member, and the flow path is opened when the valve body moves from the first member toward the second member, the second member has a wall that protrudes toward the first member from a surface of the second member facing the first member, and when the valve body moves toward the second member, the wall is a check valve that faces the tip of the valve body.

[0006] The valve body may have an axis and a protrusion, the protrusion protruding outward from the axis, the protrusion deforms in response to the pressure of the fluid, the flow path is blocked when the protrusion comes into contact with the first member, the flow path is opened when the protrusion moves from the first member toward the second member, and the wall may face the tip of the protrusion when the protrusion moves toward the second member.

[0007] The second member may have a recess that is recessed further than the wall, and when the valve body moves toward the second member, the valve body may be stored in the recess, and the wall may surround the valve body and the recess.

[0008] The wall thickness may be equal to the thickness of the tip of the valve disc.

[0009] The end of the second member may be continuous with the end of the wall. [Effects of the Invention]

[0010] A check valve capable of suppressing floating of the valve element can be provided. [Brief explanation of the drawings]

[0011] [Figure 1] 1(a) and 1(b) are cross-sectional views illustrating a check valve according to this embodiment. [Figure 2] FIG. 2 is an enlarged view of the vicinity of the tip of the protrusion. [Figure 3] FIG. 3 is a cross-sectional view illustrating a check valve according to a comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0012] The vehicle control device of this embodiment will be described below with reference to the drawings. Figures 1(a) and 1(b) are cross-sectional views illustrating a check valve 100 according to this embodiment. Figure 1(a) illustrates the check valve 100 in a closed state. Figure 1(b) illustrates the check valve 100 in an open state. The check valve 100 is rotationally symmetric about an axis A, for example.

[0013] The check valve 100 is provided in a fluid flow path. The fluid is, for example, a gas. As shown in Figures 1(a) and 1(b), the check valve 100 has a housing 10 (first member), a stopper 20 (second member), and a valve body 30.

[0014] The housing 10 has surfaces 12 and 14, and a flow path 16. Surface 12 is parallel to the left-right direction in FIG. 1. Surface 14 is parallel to the up-down direction in FIG. 1 and rises from surface 12. Surfaces 12 and 14 are inner wall surfaces. The area surrounded by surfaces 12 and 14 forms an internal space of the housing 10. The stopper 20 and the valve body 30 are housed in the space within the housing 10.

[0015] The stopper 20 has a surface 22, a surface 24, and a wall 26. The surfaces 22 and 24 are inner wall surfaces. The surface 22 is spaced apart from the surface 12 of the housing 10 and faces the surface 12. The surface 24 is spaced apart from the surface 14 and faces the surface 14. A flow path 18 is formed between the surfaces 12 and 22. A flow path 19 is formed between the surfaces 14 and 24. The flow path 16 and the flow path 18 communicate with each other. The flow path 18 and the flow path 19 communicate with each other.

[0016] Wall 26 is located at the end of stopper 20, protrudes from surface 22 toward housing 10, and is spaced apart from surface 12 of housing 10. The end of wall 26 is continuous with surface 24. A recess 28 that is recessed deeper than wall 26 is formed in the area surrounded by wall 26. Surface 22 is the bottom surface of recess 28.

[0017] The valve element 30 is made of, for example, rubber, and has a shaft 32 and a protrusion 34. The shaft 32 is attached to the housing 10. The protrusion 34 is an umbrella-shaped portion that protrudes outward from the shaft 32. The protrusion 34 elastically deforms in response to the pressure of the fluid. The deformation of the protrusion 34 causes the check valve 100 to close and open.

[0018] As shown in Figure 1(a), the protrusion 34 has a shape that hangs down toward the housing 10. When the tip 36 of the protrusion 34 comes into contact with the surface 12 of the housing 10, the flow path 18 is blocked. The check valve 100 closes. The flow of fluid is stopped midway through the flow path 18.

[0019] As shown in FIG. 1(b), the protrusion 34 is deformed by the pressure of the fluid. The protrusion 34 moves away from the housing 10 and toward the stopper 20. The stopper 20 restricts the movement of the protrusion 34. When the protrusion 34 comes into contact with the surface 22 of the stopper 20, the flow path 18 opens, and the check valve 100 opens. The fluid flows through the flow paths 16, 18, and 19.

[0020] Figure 2 is an enlarged view of the vicinity of the tip 36 of the protrusion 34, illustrating the open state. When the valve is open, the protrusion 34 of the valve body 30 is housed in the recess 28. The upper surface of the protrusion 34 contacts the surface 22 of the stopper 20. The tip 36 of the protrusion 34 faces the wall 26 of the stopper 20. The thickness T1 of the wall 26 is equal to the thickness T2 of the tip 36. The protrusion 34 and the wall 26 do not protrude into the flow path 18. The wall 26 is continuous with the surface 24. The fluid flows smoothly.

[0021] FIG. 3 is a cross-sectional view illustrating a check valve 110 according to a comparative example. The stopper 20 of the check valve 110 does not have a wall 26. When the valve is open, the tip 36 of the protrusion 34 is exposed to the air. When a fluid flows, turbulence occurs near the tip 36. The turbulence generates a force that lifts the protrusion 34 from the wall 26. The fluid also applies a force pressing the valve element 30 against the wall 26. The protrusion 34 of the valve element 30 may vibrate, potentially causing abnormal noise.

[0022] According to the embodiment, the stopper 20 has a wall 26. When the valve element 30 moves toward the stopper 20, the check valve 100 opens. At this time, the wall 26 faces the valve element 30. The wall 26 is located between the tip 36 of the valve element 30 and the surface 14 of the housing 10. For this reason, turbulence is unlikely to occur near the tip 36. A force that lifts the tip 36 from the surface 24 is unlikely to be generated. Lifting of the valve element 30 can be suppressed. Pressure is applied from the fluid to the valve element 30, pressing it against the surface 24, causing the valve element 30 to come into contact with the surface 24 and less likely to vibrate. Abnormal noise can be suppressed.

[0023] The valve body 30 has a shaft 32 and a protrusion 34. The protrusion 34 protrudes from the shaft 32 and deforms in response to the pressure of the fluid. When the protrusion 34 moves toward the stopper 20 and comes into contact with the surface 22 of the stopper 20, the flow path 18 opens and the check valve 100 opens. The wall 26 faces the tip 36 of the valve body 30. Turbulence is unlikely to occur near the tip 36. A force that lifts the tip 36 from the surface 24 is unlikely to occur. Abnormal noise can be suppressed.

[0024] The wall 26 surrounds the valve element 30. A recess 28 is formed in the portion of the stopper 20 surrounded by the wall 26. When the valve is closed, the valve element 30 is stored in the recess 28. Because the valve element 30 is surrounded by the wall 26 and the surface 22 of the stopper 20, turbulence is less likely to occur around the valve element 30. A force that lifts the valve element 30 from the stopper 20 is less likely to be generated.

[0025] The thickness T1 of the wall 26 is equal to, for example, the thickness T2 of the tip 36 of the valve body 30. A step is unlikely to occur between the tip 36 and the wall 26, and the occurrence of turbulence can be effectively suppressed. The thickness T1 may be exactly equal to the thickness T2, or may be approximately equal to the thickness T2. For example, there may be a difference between the thicknesses T1 and T2 that is equivalent to a manufacturing error.

[0026] The surface 24 of the stopper 20 is continuous with the end of the wall 26. That is, the wall 26 rises continuously from the surface 24. As shown in FIG. 2, the protrusion 34 of the valve body 30 is continuous with the wall 26 and the surface 24. This allows the fluid to flow smoothly through the flow paths 18 and 19. Turbulence can be effectively suppressed.

[0027] Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various modifications and variations are possible within the scope of the gist of the present invention as described in the claims. [Explanation of symbols]

[0028] 10 housing, 12, 14, 22, 24 surface, 16, 18, 19 flow path, 20 stopper, 26 wall, 28 recess, 30 valve body, 32 shaft, 34 protrusion, 36 tip, 100, 110 check valve

Claims

1. A first member; a second member facing the first member; a valve body provided between the first member and the second member, A flow path is formed between the first member and the second member, When the valve body comes into contact with the first member, the flow path is blocked, The flow path is opened by the valve element moving from the first member toward the second member, the second member has a wall that protrudes from a surface of the second member facing the first member toward the first member, A check valve in which the wall faces the tip of the valve body when the valve body moves toward the second member.

2. The valve body has a shaft and a protrusion, the protrusion protrudes outward from the shaft; the protrusion deforms in response to the pressure of the fluid; When the protrusion comes into contact with the first member, the flow path is blocked, The flow path is opened by the protrusion moving from the first member toward the second member, The check valve according to claim 1 , wherein the wall faces the tip of the protrusion when the protrusion moves toward the second member.

3. the second member has a recess recessed below the wall, When the valve body moves toward the second member, the valve body is accommodated in the recess, The check valve according to claim 1 or 2, wherein the wall surrounds the valve body and the recess.

4. 3. The check valve according to claim 1, wherein the thickness of the wall is equal to the thickness of the tip of the valve body.

5. 3. The check valve according to claim 1, wherein an end of the second member is continuous with an end of the wall.

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