Directional pressure release valve

Abstract

The utility model relates to a directional pressure relief valve, which comprises a valve body, a pressure relief valve core and a pressure relief valve core, the valve cover and the valve body are assembled into a whole, and a pressure relief opening communicated with the pressure relief channel is formed in the valve cover; the sealing gasket is arranged in the valve body and abuts against an outlet of the pressure relief channel through an elastic piece to form sealing fit so as to block communication between the pressure relief opening and the pressure relief channel. The face, facing the pressure relief channel, of the sealing gasket is provided with a groove structure, and the cross section area of the groove structure is gradually increased in the direction where the pressure relief channel is located. According to the directional pressure release valve designed by the utility model, the groove with a specific structure is formed in the sealing gasket, and the airflow action area is increased and the sealing gasket is intensively impacted by utilizing the groove structure, so that the pressure release valve can respond to pressure change more quickly, release system pressure in time and reduce the influence of adhesive force; the simple groove structure can effectively overcome the shrinkage defect in the injection molding process of the sealing gasket, and the flatness of the sealing plane of the sealing gasket is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure relief valves, in particular to a directional pressure relief valve. Background Art

[0002] In the prior art, a pressure relief valve is an automatic control valve that allows a medium (such as gas or liquid) to flow in one direction and automatically opens to relieve pressure when the pressure exceeds a set value to prevent damage caused by excessive system pressure.

[0003] Existing directional pressure relief valves usually use a spring and a sealing gasket to open and close. When the system pressure exceeds the set value, the medium pressure overcomes the spring preload and sealing resistance, pushing the sealing gasket to open the pressure relief channel and release the pressure. However, this structure will produce a certain amount of adhesion due to the long-term static compression between the sealing gasket and the valve body, further increasing the opening resistance and affecting the sensitivity of the pressure relief valve. Summary of the invention

[0004] In order to solve the above problems, the utility model provides a directional pressure relief valve which can respond to pressure changes more quickly and reduce the influence of adhesion.

[0005] In order to achieve the above-mentioned purpose, the directional pressure relief valve designed by the utility model comprises:

[0006] The valve body has a pressure relief passage;

[0007] A valve cover is assembled integrally with the valve body, and a pressure relief port connected to the pressure relief channel is provided on the valve cover;

[0008] A sealing gasket is disposed in the valve body and abuts against the outlet of the pressure relief channel through an elastic member to form a sealing fit so as to block the communication between the pressure relief port and the pressure relief channel;

[0009] Wherein, a groove structure is provided on the surface of the sealing gasket facing the pressure relief channel, and the cross-sectional area of ​​the groove structure gradually increases toward the direction where the pressure relief channel is located.

[0010] In order to increase the airflow action area, the longitudinal section of the groove structure is trapezoidal.

[0011] In order to achieve reliable resetting of the sealing gasket, the elastic member is a spring, a first protrusion is provided on the side of the sealing gasket away from the groove structure, a second protrusion opposite to the first protrusion is provided in the valve cover, and both ends of the spring are respectively interference fit with the first protrusion and the second protrusion.

[0012] In order to prevent the elastic member from being over-compressed, a limiting column is further provided in the valve cover, and the limiting column is used to limit the maximum displacement of the sealing gasket.

[0013] In order to enhance the sealing performance at the outlet of the pressure relief channel, a first sealing ring is provided around the outlet of the pressure relief channel, the sealing ring abuts against the sealing gasket to form a sealing fit, and the diameter of the first sealing ring is greater than the notch width of the groove structure.

[0014] In order to improve the connection strength between the valve body and the valve cover and facilitate the installation and disassembly of the product, the valve body includes a threaded portion and a torsion portion, the pressure relief channel runs through the threaded portion and the torsion portion, the valve cover is ultrasonically welded to the side of the torsion portion away from the threaded portion, and a second sealing ring is also provided on the side of the torsion portion away from the valve cover.

[0015] In order to improve the safety performance of the product, the directional pressure relief valve material is selected from UL94 V0 grade material.

[0016] For good durability, the surfaces of the first sealing ring and the sealing gasket are electroplated.

[0017] The directional pressure relief valve designed by the utility model arranges a groove of a specific structure on the sealing gasket, utilizes the groove structure to increase the airflow action area, concentrates the impact on the sealing gasket, enables the pressure relief valve to respond to pressure changes more quickly, releases the system pressure in time, and reduces the influence of adhesion. At the same time, the simple groove structure can also effectively improve the shrinkage defects in the injection molding process of the sealing gasket, and ensure the flatness of the sealing surface of the sealing gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an overall schematic diagram of a directional pressure relief valve provided in an embodiment of the present application;

[0019] Figure 2 yes Figure 1 A top view of

[0020] Figure 3 yes Figure 1 The cutaway stereogram at AA in the middle;

[0021] Figure 4 yes Figure 1 Sectional plan view at BB in the middle;

[0022] Figure 5 It is a schematic diagram of the structure of the valve cover provided in an embodiment of the present application.

[0023] Among them: valve body 10, pressure relief channel 11, valve cover 20, pressure relief port 21, sealing gasket 30, groove structure 31, elastic member 40, first protrusion 32, second protrusion 22, limiting column 23, first sealing ring 50, threaded part 12, torsion part 13, second sealing ring 60. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present utility model will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model.

[0025] Embodiment 1.

[0026] Referring to Figures 1-5 as shown, the directional pressure relief valve described in this embodiment includes:

[0027] A valve body 10 having a pressure relief channel 11;

[0028] A valve cover 20 assembled with the valve body 10 as a whole, and a pressure relief port 21 communicating with the pressure relief channel 11 is provided on the valve cover 20; A gasket 30 is arranged inside the valve body 10 and is in sealing fit against the outlet of the pressure relief channel 11 through an elastic member 40 to block the communication between the pressure relief port 21 and the pressure relief channel 11;

[0029] Wherein, a groove structure 31 is provided on the surface of the gasket 30 facing the pressure relief channel 11, and the cross-sectional area of the groove structure 31 gradually increases in the direction of the pressure relief channel 11.

[0030] The directional pressure relief valve in this embodiment is made of UL94 V0 grade material to improve product safety. In practical applications, the valve body 10 can be installed on equipment that requires pressure relief protection, such as the battery pack housing.

[0031] Specifically, when the pressure inside the battery pack is lower than the set value, the elastic member 40 presses the gasket 30 towards the outlet of the pressure relief channel 11, and the groove structure 31 is in a closed state, and the pressure relief valve is closed, isolating the inside of the battery pack from the outside environment.

[0032] When the pressure inside the battery pack exceeds the set value due to reasons such as temperature rise, the pressure pushes the gasket 30. At this time, the groove structure 31 starts to function. Due to the design that its cross-sectional area gradually increases along the direction of the pressure relief channel 11, the airflow passing through can contact and impact the gasket 30 with a larger area. This enhanced impact force, combined with the action of the airflow itself, overcomes the elastic force of the elastic member 40 and the possible adhesion force between the gasket 30 and the valve body 10, and then pushes the gasket 30 to move upward, opening the pressure relief channel 11, and releasing the pressure inside the battery pack from the pressure relief port 21.

[0033] Once the pressure inside the battery pack drops below the set value, the pressure relief process ends, and the elastic force of the elastic member 40 causes the gasket 30 to reset and re-close the pressure relief channel 11, returning the pressure relief valve to the closed state. In addition, the design of the groove structure 31 can also effectively improve the shrinkage defect that may occur in the gasket 30 during the injection molding process, ensure the flatness of the sealing surface of the gasket 30, and further improve the sealing performance and reliability of the product.

[0034] In some embodiments, referring to Figure 4 as shown, the longitudinal section of the groove structure 31 is trapezoidal. In this way, while meeting the structural design that the cross-sectional area of the groove structure 31 gradually increases in the direction of the pressure relief channel 11, the bottom surface of the groove structure 31 is designed as a plane, which means that when the airflow impacts the gasket 30, it acts on a larger area and makes the force on the gasket 30 more stable, thus making it easier to overcome the pre-tightening force and adhesion force of the elastic member 40 and open the pressure relief channel 11.

[0035] In some embodiments, referring to Figure 3 、 Figure 4 and Figure 5 as shown, in order to achieve reliable reset of the gasket 30, the elastic member 40 is a spring. A first protrusion 32 is provided on the side of the gasket 30 facing away from the groove structure 31. A second protrusion 22 opposite to the first protrusion 32 is provided in the valve cover 20. The two ends of the spring are in interference fit with the first protrusion 32 and the second protrusion 22 respectively. This structural design is simple and clear, easy to process and assemble, and is beneficial to reducing production costs and improving production efficiency.

[0036] In some embodiments, referring to Figure 3 as shown, in order to prevent the elastic member 40 from being over-compressed, a limiting post 23 is further provided in the valve cover 20, and the limiting post 23 is used to limit the maximum displacement of the gasket 30. With this structural design, when, for example, the system pressure suddenly increases or fluctuates greatly, the gasket 30 may be subjected to a greater impact force, and the elastic member 40 may be over-compressed beyond its elastic limit, resulting in permanent deformation or even fracture of the elastic member 40, and ultimately leading to the failure of the pressure relief valve. The setting of the limiting post 23 can limit the maximum displacement of the gasket 30, so that even in extreme cases, the gasket 30 will not be unable to reset normally due to excessive displacement, thus ensuring that the pressure relief valve can be reliably closed after pressure relief.

[0037] In some embodiments, referring to Figure 3 as shown, in order to enhance the sealing performance at the outlet of the pressure relief channel 11, a first sealing ring 50 is provided on the periphery of the outlet of the pressure relief channel 11. The sealing ring is in sealing fit with the gasket 30, and the diameter of the first sealing ring 50 is greater than the width of the notch of the groove structure 31. The surfaces of the first sealing ring 50 and the gasket 30 are treated by electroplating.

[0038] In this way, a first sealing ring 50 is arranged at the outlet of the pressure relief channel 11 to form a tighter sealing structure with the sealing gasket 30, and reliable sealing performance can be guaranteed even when the sealing gasket 30 is slightly deformed due to pressure shock. At the same time, electroplating the first sealing ring 50 and the sealing gasket 30 can enhance their surface hardness and wear resistance, extend their service life, and especially reduce the possibility of adhesion caused by long-term static compression.

[0039] In some embodiments, see Figure 3 As shown, in order to improve the connection strength between the valve body 10 and the valve cover 20 and facilitate the installation and disassembly of the product, the valve body 10 includes a threaded portion 12 and a torsion portion 13, the pressure relief channel 11 passes through the threaded portion 12 and the torsion portion 13, the valve cover 20 is ultrasonically welded to the side of the torsion portion 13 away from the threaded portion 12, and a second sealing ring 60 is also provided on the side of the torsion portion 13 away from the valve cover 20.

[0040] In specific implementation, the threaded portion 12 of the valve body 10 can firmly connect it to other equipment, and the torsion portion 13 designed in the style of a hexagonal nut provides convenience for the installation and removal of the valve body 10; the ultrasonic welding technology is used between the valve cover 20 and the torsion portion 13 to ensure the firmness of the connection and avoid loosening that may occur in long-term use or vibration environment. In addition, a second sealing ring 60 is also provided on the side of the torsion portion 13 away from the valve cover 20, which further enhances the sealing performance of the valve body 10 after assembly and effectively prevents leakage.

[0041] The directional pressure relief valve provided in this embodiment provides a groove with a specific structure on the sealing gasket, utilizes the groove structure to increase the airflow action area, and concentrates the impact on the sealing gasket, so that the pressure relief valve can respond to pressure changes more quickly, release the system pressure in time, and reduce the influence of adhesion. At the same time, the simple groove structure can also effectively improve the shrinkage defects in the injection molding process of the sealing gasket and ensure the flatness of the sealing surface of the sealing gasket.

[0042] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A directional pressure relief valve, characterized in that: include: The valve body has a pressure relief passage; A valve cover is assembled integrally with the valve body, and a pressure relief port connected to the pressure relief channel is provided on the valve cover; A sealing gasket is disposed in the valve body and abuts against the outlet of the pressure relief channel through an elastic member to form a sealing fit so as to block the communication between the pressure relief port and the pressure relief channel; Wherein, a groove structure is provided on the surface of the sealing gasket facing the pressure relief channel, and the cross-sectional area of ​​the groove structure gradually increases toward the direction where the pressure relief channel is located.

2. The directional pressure relief valve according to claim 1, characterized in that: The longitudinal section of the groove structure is trapezoidal.

3. The directional pressure relief valve according to claim 1, characterized in that: The elastic member is a spring, a first protrusion is provided on the side of the sealing gasket away from the groove structure, a second protrusion opposite to the first protrusion is provided in the valve cover, and two ends of the spring are respectively interference fit with the first protrusion and the second protrusion.

4. The directional pressure relief valve according to claim 1 or 3, characterized in that: A limiting column is also provided in the valve cover, and the limiting column is used to limit the maximum displacement of the sealing gasket.

5. The directional pressure relief valve according to claim 1, characterized in that: A first sealing ring is arranged around the outlet of the pressure relief channel, the sealing ring abuts against the sealing gasket to form a sealing fit, and the diameter of the first sealing ring is greater than the notch width of the groove structure.

6. The directional pressure relief valve according to claim 1, characterized in that: The valve body comprises a threaded portion and a torsion portion, the pressure relief channel penetrates the threaded portion and the torsion portion, the valve cover is ultrasonically welded to a side of the torsion portion away from the threaded portion, and a second sealing ring is also provided on a side of the torsion portion away from the valve cover.

7. The directional pressure relief valve according to claim 1, 5 or 6, characterized in that: The directional pressure relief valve is made of UL94 V0 grade material.

8. The directional pressure relief valve according to claim 5, characterized in that: The surfaces of the first sealing ring and the sealing gasket are electroplated.

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