Check valve

Abstract

The invention provides a check valve which can restrain floating of a valve body. The check valve includes: a first member; the second component is opposite to the first component; and a valve body provided between the first member and the second member, in which 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 protruding toward the first member from a surface of the second member facing the first member, and the wall faces a front end of the valve body when the valve body moves toward the second member.

Description

Technical Field

[0001] This invention relates to check valves. Background Technology

[0002] Sometimes a check valve is installed in the flow path of the fluid (e.g., Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2017-26108 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] The check valve opens and closes by deforming its valve core. When the valve is open, the valve core contacts the stop, opening the flow path. Sometimes, turbulence is generated in the fluid. This turbulence generates a force that causes the valve core to float off the stop. Due to this force, the valve core sometimes vibrates, producing abnormal noise. Therefore, the object of the present invention is to provide a check valve capable of suppressing the floating of the valve core.

[0008] Methods for solving problems

[0009] The above objective can be achieved by a check valve comprising: a first component; a second component opposite to the first component; and a valve core disposed between the first component and the second component, wherein a flow path is formed between the first component and the second component, the flow path is blocked when the valve core contacts the first component, and the flow path is opened when the valve core moves from the first component to the second component, wherein the second component has a wall protruding from the side of the second component opposite to the first component toward the first component, and the wall is opposite to the front end of the valve core when the valve core moves toward the second component.

[0010] Alternatively, the valve core may have a shaft and a protrusion that protrudes outward from the axial direction. The protrusion deforms according to the pressure of the fluid. The flow path is blocked when the protrusion contacts the first component. The flow path is opened when the protrusion moves from the first component to the second component. When the protrusion moves towards the second component, the wall is opposite to the front end of the protrusion.

[0011] Alternatively, the second component may have a recess that is deeper than the wall, and when the valve core moves toward the second component, the valve core is received in the recess, and the wall surrounds the valve core and the recess.

[0012] Alternatively, the thickness of the wall can be equal to the thickness of the front end of the valve core.

[0013] Alternatively, the end of the second component may be continuous with the end of the wall.

[0014] Invention Effects

[0015] It is possible to provide a check valve that can suppress the floating of the valve core. Attached Figure Description

[0016] Figure 1 (a) and Figure 1 (b) is a cross-sectional view illustrating the check valve of this embodiment.

[0017] Figure 2 This is an enlarged view of the area near the front end of the protrusion.

[0018] Figure 3 This is a cross-sectional view of a check valve illustrating a comparative example. Detailed Implementation

[0019] Hereinafter, the control device for the vehicle according to this embodiment will be described with reference to the accompanying drawings. Figure 1 (a) and Figure 1 (b) is a cross-sectional view illustrating the check valve 100 of this embodiment. Figure 1 Figure (a) shows the check valve 100 in the closed state. Figure 1 Figure (b) illustrates the open state of check valve 100. Check valve 100 is, for example, rotationally symmetric about axis A.

[0020] A check valve 100 is installed in the flow path of a fluid. The fluid may be, for example, a gas. Figure 1 (a) and Figure 1 As shown in (b), the check valve 100 has a housing 10 (first component), a stop 20 (second component), and a valve core 30.

[0021] The housing 10 has a surface 12 and a surface 14, and a flow path 16. Surface 12 and... Figure 1 The left and right directions are parallel. Face 14 and... Figure 1 The vertical direction is parallel, rising from surface 12. Surfaces 12 and 14 are the inner wall surfaces. The portion surrounded by surfaces 12 and 14 forms the internal space of the housing 10. The stop 20 and the valve core 30 are housed within the space of the housing 10.

[0022] The stop member 20 has a surface 22, a surface 24, and a wall 26. Surfaces 22 and 24 are inner wall surfaces. Surface 22 is separate from and opposite to surface 12 of the housing 10. Surface 24 is separate from and opposite to surface 14. A flow path 18 is formed between surface 12 and surface 22. A flow path 19 is formed between surface 14 and surface 24. Flow path 16 communicates with flow path 18. Flow path 18 communicates with flow path 19.

[0023] The wall 26 is located at the end of the stop 20, protruding from the surface 22 toward the housing 10 and separated from the surface 12 of the housing 10. The end of the wall 26 is continuous with the surface 24. A recess 28, which is recessed from the wall 26, is formed in the portion surrounded by the wall 26. The surface 22 is the bottom surface of the recess 28.

[0024] The valve core 30 is, for example, made of rubber, and has a shaft 32 and a protrusion 34. The shaft 32 is mounted on the housing 10. The protrusion 34 is an umbrella-shaped portion that protrudes outward from the shaft 32. The protrusion 34 elastically deforms according to the pressure of the fluid. Through the deformation of the protrusion 34, the check valve 100 closes and opens.

[0025] like Figure 1 As shown in (a), the protrusion 34 has a shape that hangs downward toward the housing 10. The flow path 18 is blocked by the contact between the front end 36 of the protrusion 34 and the surface 12 of the housing 10. The check valve 100 is closed. The flow of fluid stops midway through the flow path 18.

[0026] like Figure 1 As shown in (b), the protrusion 34 deforms under the pressure of the fluid. The protrusion 34 separates from the housing 10 and moves toward the stop 20. The stop 20 restricts the movement of the protrusion 34. Through the contact between the protrusion 34 and the surface 22 of the stop 20, the flow path 18 is opened, and the check valve 100 is opened. The fluid flows in the flow paths 16, 18, and 19.

[0027] Figure 2 This is an enlarged view of the area near the front end 36 of the protrusion 34, illustrating the valve open state. When the valve is open, the protrusion 34 of the valve core 30 is housed in the recess 28. The upper surface of the protrusion 34 contacts the surface 22 of the stop 20. The front end 36 of the protrusion 34 faces the wall 26 of the stop 20. The thickness T1 of the wall 26 is equal to the thickness T2 of the front end 36. Neither the protrusion 34 nor the wall 26 protrudes into the flow path 18. The wall 26 is continuous with the surface 24. Fluid flows smoothly.

[0028] Figure 3 This is a cross-sectional view of a check valve 110 illustrating a comparative example. The stop member 20 of the check valve 110 does not have a wall 26. When the valve is opened, the front end 36 of the protrusion 34 is exposed into space. When fluid flows, turbulence is generated near the front end 36. Due to the turbulence, a force is generated at the protrusion 34 that lifts it from the wall 26. A force from the fluid also presses against the wall 26 on the valve core 30. Vibration of the protrusion 34 of the valve core 30 may produce abnormal noise.

[0029] According to the embodiment, the stop member 20 has a wall 26. The check valve 100 opens when the valve core 30 moves toward the stop member 20. At this time, the wall 26 is opposite to the valve core 30. The wall 26 is located between the front end portion 36 of the valve core 30 and the surface 14 of the housing 10. Therefore, turbulence is less likely to occur near the front end portion 36. It is difficult to generate a force that would cause the front end portion 36 to float off the surface 24. Floating of the valve core 30 can be suppressed. When pressure is applied from the fluid to the valve core 30 pressing against the surface 24, the valve core 30 contacts the surface 24, making vibration difficult. Abnormal noise can be suppressed.

[0030] The valve core 30 has a shaft 32 and a protrusion 34. The protrusion 34 protrudes from the shaft 32 and deforms according to the pressure of the fluid. The protrusion 34 moves toward the stop 20 and contacts the surface 22 of the stop 20, thereby opening the flow path 18 and opening the check valve 100. The wall 26 is opposite to the front end 36 of the valve core 30. Turbulence is less likely to occur near the front end 36. It is difficult to generate a force that would cause the front end 36 to float off the surface 24. This helps to suppress abnormal noise.

[0031] The valve core 30 is surrounded by wall 26. A recess 28 is formed in the portion of the stop 20 surrounded by wall 26. When the valve is closed, the valve core 30 is housed in the recess 28. Because the valve core 30 is surrounded by the wall 26 and surface 22 of the stop 20, turbulence is difficult to generate around the valve core 30. It is difficult to generate a force that would cause the valve core 30 to float off the stop 20.

[0032] The thickness T1 of wall 26 is, for example, equal to the thickness T2 of the front end 36 of valve core 30. This prevents the formation of steps between the front end 36 and wall 26, effectively suppressing turbulence. Thickness T1 can be strictly equal to thickness T2, or approximately equal. For example, sometimes there are differences in the degree of manufacturing error between thicknesses T1 and T2.

[0033] The surface 24 of the stop 20 is continuous with the end of the wall 26. That is, the wall 26 rises continuously from the surface 24. Figure 2 As shown, the protrusion 34, wall 26, and surface 24 of the valve core 30 are continuous. Fluid flows smoothly in flow paths 18 and 19, effectively suppressing turbulence.

[0034] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to these specific embodiments. Various modifications and alterations can be made within the scope of the spirit of the present invention as set forth in the claims.

[0035] Explanation of reference numerals in the attached figures

[0036] 10 Housing, 12, 14, 22, 24 Surfaces, 16, 18, 19 Flow path, 20 Stop, 26 Wall, 28 Recess, 30 Valve core, 32 Shaft, 34 Protrusion, 36 Front end, 100, 110 Check valve

Claims

1. A check valve, comprising: First component; The second component is opposite to the first component; and The valve core is located between the first component and the second component. A flow path is formed between the first component and the second component. The flow path is blocked when the valve core contacts the first component. The flow path is opened when the valve core moves from the first component to the second component. The second component has a wall that protrudes from the side of the second component opposite to the first component toward the first component. As the valve core moves toward the second component, the wall is opposite to the front end of the valve core.

2. The check valve according to claim 1, wherein, The valve core has a shaft and a protrusion. The protrusion protrudes outward from the axial direction. The protrusion deforms according to the pressure of the fluid. The flow path is blocked by the protrusion contacting the first component. The flow path is opened as the component moves from the first component toward the second component via the protrusion. As the protrusion moves toward the second component, the wall is opposite to the front end of the protrusion.

3. The check valve according to claim 1 or 2, wherein, The second component has a recess that is deeper than the wall. As the valve core moves toward the second component, the valve core is housed in the recess. The wall surrounds the valve core and the recess.

4. The check valve according to claim 1 or 2, wherein, The thickness of the wall is equal to the thickness of the front end of the valve core.

5. The check valve according to claim 1 or 2, wherein, The end of the second component is continuous with the end of the wall.

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