A pressure relief valve

Abstract

The pressure relief valve comprises a valve body, a spring and a valve core assembly, the valve core assembly comprises a valve rod, the valve body comprises a sliding part, the valve rod and the sliding part are in sliding fit, the stability of the valve core assembly can be enhanced, and the radial swing of the valve core assembly is reduced; and the inner side of the outer peripheral part has a flow passage, the spring is sleeved on the circumferential outer side of the outer peripheral part, compared with the scheme that the spring is located in the flow passage, the spring is sleeved on the circumferential outer side of the outer peripheral part, the space in the flow passage is avoided, the disturbance of fluid to the spring is reduced, the swing of the valve core assembly is reduced, and the stability of the valve core assembly is improved.

Description

Technical Field

[0001] This application relates to the field of thermal management technology, specifically to a pressure relief valve for vehicles. Background Technology

[0002] In the prior art, the valve core assembly of the pressure relief valve is located in the valve body, and the flow channel is located between the valve body and the valve core assembly. When the pressure is released, the fluid is discharged from the flow channel in the pressure relief valve. The fluid impacts the valve core assembly, causing the valve core assembly to shake in the valve body, thereby affecting the stability of the valve core assembly. Summary of the Invention

[0003] One objective of this application is to provide a pressure relief valve with better valve core stability.

[0004] To achieve the above objectives, this application adopts the following technical solution: a pressure relief valve, comprising a valve body, a spring, and a valve core assembly. The valve body includes an intake chamber and an exhaust chamber, and the valve body includes a sliding portion. The valve core assembly includes a valve stem, at least a portion of the outer periphery of the valve stem slidingly engaging with the sliding portion. The spring is sleeved on the circumferential outer side of the outer periphery. The valve core assembly has a flow channel, at least a portion of which is located on the inner side of the outer periphery. The pressure relief valve includes a closed state and an open state. When the pressure relief valve is in the open state, the flow channel connects the intake chamber and the exhaust chamber.

[0005] In the technical solution of this application, the pressure relief valve includes a valve body, a spring, and a valve core assembly. The valve core assembly includes a valve stem, and the valve body includes a sliding part. The outer periphery of the valve stem and the sliding part are slidably engaged, which can enhance the stability of the valve core assembly and reduce the radial sway of the valve core assembly. Furthermore, the inner side of the outer periphery has a flow channel, and the spring is sleeved on the circumferential outer side of the outer periphery. Compared with the solution where the spring is located in the flow channel, the spring being sleeved on the circumferential outer side of the valve stem avoids occupying the space in the flow channel, which helps to reduce the disturbance of the fluid to the spring during the pressure relief process, and helps to reduce the sway of the valve core assembly and improve the stability of the valve core assembly. Attached Figure Description

[0006] Figure 1 An exploded structural diagram of the pressure relief valve of this application is shown;

[0007] Figure 2 It shows Figure 1 The diagram shown is a schematic representation of an embodiment of the pressure relief valve of this application after installation.

[0008] Figure 3 It shows Figure 1 The diagram shown is a structural schematic of one embodiment of the pressure relief valve at an angle.

[0009] Figure 4 It shows Figure 3The diagram shows a cross-sectional view of the pressure relief valve in its open state along line BB, according to one embodiment.

[0010] Figure 5 It shows Figure 3 The diagram shows a cross-sectional view of the pressure relief valve in its closed state along line BB, according to one embodiment.

[0011] Figure 6 It shows Figure 3 The diagram shows a cross-sectional view along line BB in the closed state of another embodiment of the pressure relief valve.

[0012] Figure 7 It shows Figure 4 A schematic diagram of one embodiment of the spring and valve core assembly shown at an angle;

[0013] Figure 8 It shows Figure 4 A schematic diagram of another embodiment of the spring and valve core assembly shown at an angle;

[0014] Figure 9 It shows Figure 4 The diagram shows a cross-sectional view of one embodiment of the valve body along line BB.

[0015] 100. Pressure relief valve; 1. Valve body; 2. Valve core assembly; 3. Spring; 4. Inlet chamber; 5. Exhaust chamber; 41. Valve port; 11. Sliding part; 12. Valve seat; 21. Limiting element; 22. Valve stem; 23. End; 24. Seal; 25. Flow passage; 26. Threaded part; 27. Outer periphery; 251. Inlet port; 252. Outlet port. Detailed Implementation

[0016] The embodiments are described in detail below with reference to the accompanying drawings.

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the application will be described in further detail below with reference to the accompanying drawings and specific embodiments. In this document, relational terms such as "first" and "second" are used merely to distinguish one component from another that has the same name, and do not necessarily require or imply any such actual relationship or order between these components.

[0018] like Figure 1-9As shown, a pressure relief valve 100 includes a valve body 1, a spring 3, and a valve core assembly 2. The valve body 1 includes an inlet chamber 4 and an exhaust chamber 5, with the exhaust chamber 5 communicating with the external environment. The inlet chamber 4 includes a valve port 41. Under high pressure conditions, fluid enters the valve body 1 through the valve port 41, pushing the valve core assembly 2 and compressing the spring 3. After the valve core assembly 2 opens, it connects the inlet chamber 4 and the exhaust chamber 5, releasing pressure after the fluid is discharged. When the internal pressure decreases, the spring 3 extends, and the valve core assembly 2 closes, blocking the inlet chamber 4 from the exhaust chamber 5. The valve core assembly 2 has a flow channel 25 inside. The pressure relief valve 100 includes a closed state and an open state. When the pressure relief valve 100 is in the open state, the flow channel 25 connects the inlet chamber 4 and the exhaust chamber 5.

[0019] like Figure 1-9 As shown, the valve body 1 includes a sliding part 11, and the valve core assembly 2 includes a valve stem 22. The outer peripheral part 27 is located on the circumferential outer wall of the valve stem 22. At least a portion of the outer peripheral part 27 of the valve stem 22 slides with the sliding part 11, which can enhance the stability of the valve core assembly 2 and reduce the radial sway of the valve core assembly 2. The valve core assembly 2 has a flow channel 25, at least a portion of which is located inside the outer peripheral part 27. The spring 3 is sleeved on the circumferential outer side of the outer peripheral part 27. This not only limits the movement of the spring 3 but also makes fuller use of the internal space of the spring 3. Compared with the solution where the spring 3 is located inside the flow channel 25, the spring 3 is sleeved on the circumferential outer side of the valve stem 22, which avoids occupying the space inside the flow channel. This helps to reduce the disturbance of the fluid to the spring 3 during the depressurization process and reduces the sway of the valve core assembly 2. The outer periphery 27 of the valve core assembly 2 cooperates with the sliding part 11. The valve core assembly 2 has a flow channel 25 inside and a spring 3 is sleeved on the outside. The space inside the valve body 1 is fully planned, which also helps to improve the stability of the valve core assembly 2.

[0020] like Figures 4-6 As shown, the flow channel 25 has at least one air inlet 251 and an air outlet 252. The air inlet 251 is located in the air inlet chamber 4, and the air outlet 252 is away from the valve port 41 relative to the air inlet 251. The pressure relief valve 100 includes a closed state and an open state. When the pressure relief valve 100 is in the closed state, the valve body 1 closes the air outlet 252. When the pressure relief valve 100 is in the open state, the air outlet 252 connects the exhaust chamber 5 and the flow channel 25.

[0021] One technical solution of this application is as follows: Figure 8 As shown, the air inlet 251 is located on the end face of the valve stem 22 near the valve port 41, and the air outlet 252 is located on the outer circumferential wall of the valve stem 22. When the pressure relief valve 100 is in the closed state, the sliding part 11 seals the air outlet 252; when the pressure relief valve 100 is in the open state, as shown... Figure 6As shown, the flow channel 25 connects the intake chamber 4 and the exhaust chamber 5. The flow channel 25 is located inside the valve stem 22. High-pressure fluid enters the flow channel 25 from the intake hole 251 at one end of the valve stem 22, pushing the valve core assembly 2 to open the outlet hole 252. The fluid flows out of the flow channel 25 from the outlet hole 252 and enters the exhaust chamber 5, thereby realizing the function of pressure relief.

[0022] Another technical solution of this application, such as Figure 4 and Figure 5 As shown, the valve core assembly 2 includes an end portion 23, which is connected to the valve stem 22 and abuts against the valve body 1. The end portion 23 provides a limiting function, and the wall of the exhaust chamber 5 includes a valve seat portion 12. Further, as... Figure 7 As shown, the air inlet 251 is located on the end face of the valve stem 22 near the valve port 41, and the air outlet 252 is located on the circumferential outer wall of the end 23. When the pressure relief valve 100 is in the closed state, as... Figure 5 As shown, the sliding part 11 seals the vent 252; when the pressure relief valve 100 is in the open state, as... Figure 4 As shown, the flow channel 25 connects the intake chamber 4 and the exhaust chamber 5.

[0023] like Figure 4 and Figure 9 As shown, the sliding part 11 is orifice-shaped, and the radial dimension of the end 23 is larger than the inner diameter of the sliding part 11, which prevents the valve core assembly 2 from dislodging from the valve body 1 when the valve is opened or closed, thus improving the stability of the pressure relief valve 100 in the closed state. When the pressure relief valve 100 is in the open state, the vent 252 is at least partially facing the valve seat 12, and the high-pressure fluid is discharged from the vent 252. Along the axial direction of the pressure relief valve 100, the inlet chamber 4, the sliding part 11, and the exhaust chamber 5 are arranged in sequence, and at least part of the spring 3 is located in the inlet chamber 4.

[0024] like Figure 4 and Figure 5 As shown, the valve body 1 includes a valve seat portion 12, and the valve core assembly 2 includes an end portion 23, which can abut against the valve seat portion 12. The direction of movement of the valve core assembly 2 is defined as the axial direction of the pressure relief valve 100. Along the axial direction of the pressure relief valve 100, the inner diameter of the valve seat portion 12 gradually increases, and the outer diameter of the end portion 23 gradually increases. The cross-section of the end portion 23 is conical, which provides better centering and improves the stability of the pressure relief valve 100 in the closed state. Furthermore, when the vent 252 is located at the conical end portion 23, fluid can be discharged from the vent 252 the instant the conical end portion 23 separates from the valve seat portion 12, resulting in a faster valve opening response.

[0025] In some embodiments of the above technical solutions, such as Figure 5As shown, end 23 includes a seal 24, which is an elastic element. The seal 24 is located on the circumferential outer side of end 23. The seal 24 is far away from the air inlet chamber 4 relative to the air outlet 252, which helps to improve the sealing effect of the pressure relief valve 100.

[0026] Another technical solution of this application, such as Figures 4-6 As shown, the valve core assembly 2 includes a limiting member 21, which is located in the air intake chamber 4. The limiting member 21 is limited or fixedly connected to the valve stem 22. The valve body 1 is located on one side of the spring 3, and the limiting member 21 is located on the other side of the spring 3. The limiting member 21 limits the spring 3, reducing the risk of the spring 3 falling off during the opening and closing of the valve.

[0027] like Figure 7 and Figure 8 As shown, the direction of fluid flow is defined as the axial direction of the pressure relief valve 100. The spring 3 is a conical spring. Along the axial direction of the pressure relief valve 100, the diameter of the spring 3 gradually increases, that is, a conical spring 3 is used. Using a conical spring 3 is beneficial to assist in centering the valve core assembly 2 and to reduce the radial sway of the valve core assembly 2.

[0028] like Figure 7 and Figure 8 As shown, the outer peripheral portion 27 includes a threaded portion 26, which is away from the exhaust chamber 5 relative to the sliding portion 11. The threaded portion 26 is located on the circumferential outer wall of the valve stem 22. The limiting member 21 is threadedly connected to the threaded portion 26. The position of the limiting member 21 can be adjusted by the thread, which can adjust the preload of the spring 3 and facilitate the control of the valve opening pressure.

[0029] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present invention. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A pressure relief valve, characterized in that, The valve assembly includes a valve body (1), a spring (3), and a valve core assembly (2). The valve body (1) includes an intake chamber (4) and an exhaust chamber (5). The valve body (1) includes a sliding part (11). The valve core assembly (2) includes a valve stem (22). At least a portion of the outer periphery (27) of the valve stem (22) is slidably engaged with the sliding part (11). The spring (3) is sleeved on the circumferential outer side of the outer periphery (27). The valve core assembly (2) has a flow channel (25). At least a portion of the flow channel (25) is located inside the outer periphery (27). The pressure relief valve (100) includes a closed state and an open state. When the pressure relief valve (100) is in the open state, the flow channel (25) connects the intake chamber (4) and the exhaust chamber (5).

2. The pressure relief valve according to claim 1, characterized in that, The air intake chamber (4) includes a valve port (41), and the flow channel (25) has at least one air inlet (251) and an air outlet (252). The air inlet (251) is located in the air intake chamber (4), and the air outlet (252) is located away from the valve port (41) relative to the air inlet (251). The pressure relief valve (100) includes a closed state and an open state. When the pressure relief valve (100) is in the closed state, the valve body (1) closes the air outlet (252). When the pressure relief valve (100) is in the open state, the air outlet (252) connects the exhaust chamber (5) and the flow channel (25).

3. The pressure relief valve according to claim 2, characterized in that, The valve core assembly (2) includes an end (23) connected to the valve stem (22), the valve body (1) includes a valve seat (12), the end (23) is capable of abutting against the valve seat (12), and the wall forming the exhaust chamber (5) includes the valve seat (12).

4. The pressure relief valve according to claim 2 or 3, characterized in that, The air inlet (251) is located on one end face of the valve stem (22) near the valve port (41), and the air outlet (252) is located on the circumferential outer wall of the valve stem (22). When the pressure relief valve (100) is in the closed state, the sliding part (11) seals the air outlet (252); when the pressure relief valve (100) is in the open state, the flow channel (25) connects the air inlet chamber (4) and the exhaust chamber (5).

5. The pressure relief valve according to claim 3, characterized in that, The air inlet (251) is located on the end face of the valve stem (22) near the valve port (41), and the air outlet (252) is located on the circumferential outer wall of the end (23). When the pressure relief valve (100) is in the closed state, the valve seat (12) seals the air outlet (252); when the pressure relief valve (100) is in the open state, the flow channel (25) connects the air inlet chamber (4) and the exhaust chamber (5).

6. The pressure relief valve according to any one of claims 3-5, characterized in that, The sliding part (11) is orifice-shaped. The direction of action of the valve core assembly (2) is defined as the axial direction of the pressure relief valve (100). Along the axial direction of the pressure relief valve (100), the air intake chamber (4), the sliding part (11), and the exhaust chamber (5) are arranged in sequence. The maximum radial dimension of the end (23) is greater than the inner diameter of the sliding part (11). At least part of the spring (3) is located in the air intake chamber (4).

7. The pressure relief valve according to claim 6, characterized in that, Along the axial direction of the pressure relief valve (100), the inner diameter of the valve seat portion (12) gradually increases, and the outer diameter of the end portion (23) gradually increases.

8. The pressure relief valve according to any one of claims 4-7, characterized in that, The end portion (23) includes a seal (24), which is an elastic element. The seal (24) is located circumferentially outside the end portion (23) and is located away from the air inlet chamber (4) relative to the air outlet (252).

9. The pressure relief valve according to any one of claims 1-8, characterized in that, The valve core assembly (2) includes a limiting member (21) located in the air intake chamber (4). The limiting member (21) is limited or fixedly connected to the valve stem (22). The valve body (1) is located on one side of the spring (3), and the limiting member (21) is located on the other side of the spring (3).

10. The pressure relief valve according to claim 9, characterized in that, The direction of fluid flow is defined as the axial direction of the pressure relief valve (100). The spring (3) is a conical spring, and the diameter of the spring (3) gradually increases along the axial direction of the pressure relief valve (100).

11. The pressure relief valve according to claim 9 or 10, characterized in that, The outer peripheral portion (27) includes a threaded portion (26) which is located away from the end (23) relative to the sliding portion (11). The threaded portion (26) is located on the circumferential outer wall of the valve stem (22), and the limiting member (21) is threadedly connected to the threaded portion (26).

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