An easily adjustable pressure relief valve

Abstract

This utility model relates to the field of pressure relief valve technology, specifically to a pressure relief valve that is easy to adjust. It includes a valve body with a valve cavity inside. A valve core is slidably disposed within the valve cavity. The front wall of the valve cavity has a connecting hole communicating with the front side of the valve body. The rear wall of the valve cavity has a recessed elastic groove with a spring installed within it. The front end of the spring is in contact with the rear side of the valve core, and the rear side of the spring is in contact with the bottom of the elastic groove. A rigid sealing ring is protruding from the front side of the valve core. A pressure relief hole communicating with the rear side of the valve core is located outside the rigid sealing ring on the front side of the valve core. A connecting pipe communicating with the elastic groove is located on the side of the valve body. A rubber sealing layer is provided on the front wall of the valve cavity. This invention solves the problem in existing low-pressure safety valves where the contact area between the sealing surface and the sealing ring is too large, easily causing significant adhesion or adsorption between the sealing surface and the sealing ring, thus preventing the safety valve from opening under rated pressure.

Description

Technical Field

[0001] This utility model relates to the field of pressure relief valve technology, and specifically to a pressure relief valve that is easy to adjust. Background Technology

[0002] Missile launch containers, also known as storage and launch containers, are one of the most important components of modern missiles. They bear the heavy responsibility of storage, transportation, temperature control, erection, and support, and play a directional role during launch.

[0003] Valves are needed in the field of missile launcher technology to ensure the air pressure inside the missile launcher, thereby making the storage and handling of missiles safer.

[0004] However, most low-pressure safety valves currently use O-rings and rectangular sealing rings. These seals are axial or face seals, and the sealing effect is achieved by applying pre-pressure to compress the sealing ring or rubber end face to eliminate the gap between the sealing surfaces. However, this sealing method has a drawback: because the contact area between the sealing surface and the sealing ring is too large, a large adhesion or adsorption phenomenon occurs between the sealing surface and the sealing ring. This phenomenon has a very serious impact on low-pressure safety valves, causing the safety valve to fail to open under the rated pressure, resulting in serious consequences. Utility Model Content

[0005] The purpose of this invention is to provide an easily adjustable pressure relief valve, which solves the problem in the prior art where the contact area between the sealing surface and the sealing ring in low-pressure safety valves is too large, easily causing significant adhesion or adsorption between the sealing surface and the sealing ring, thus preventing the safety valve from opening under rated pressure.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An easily adjustable pressure relief valve includes a valve body with a valve cavity inside. A valve core is slidably disposed within the valve cavity. The front wall of the valve cavity has a connecting hole communicating with the front side of the valve body. The rear wall of the valve cavity has a recessed elastic groove with a spring installed inside. The front end of the spring is in contact with the rear side of the valve core, and the rear side of the spring is in contact with the bottom of the elastic groove. A rigid sealing ring is protruding from the front side of the valve core. The front side of the rigid sealing ring surrounds the connecting hole and seals against the front wall of the valve cavity. A pressure relief hole communicating with the rear side of the valve core is disposed on the outer side of the rigid sealing ring on the front side of the valve core. A connecting pipe communicating with the elastic groove is disposed on the side of the valve body. A rubber sealing layer is disposed on the front wall of the valve cavity.

[0007] A further technical solution is to provide an installation ring around the outer wall of the valve body, and to provide an installation thread on the front side of the installation ring around the outer wall of the valve body. The valve body is connected to an installation nut through the installation thread, and a sealing ring is provided on the front side of the installation ring.

[0008] A further technical solution is that a connecting groove is provided in the middle of the rear side of the valve core, and multiple pressure relief holes are provided, all of which are connected to the connecting groove.

[0009] A further technical solution is that the rear side of the valve body is provided with an adjusting screw hole that communicates with the bottom of the elastic groove. An adjusting screw is connected to the adjusting screw hole by an internal thread. The front end of the adjusting screw is placed in the elastic groove and connected to a top plate. The rear side of the spring is in contact with the top plate. The rear end of the adjusting screw is connected to a knob plate at the rear of the valve body.

[0010] A further technical solution is that the side of the valve body is provided with a locking threaded hole that communicates with the adjusting screw hole, and a locking screw is matched and connected to the internal thread of the locking threaded hole.

[0011] A further technical solution is to gradually reduce the cross-sectional thickness of the rigid sealing ring from the rear to the front.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. By setting a rubber sealing layer and a hard sealing ring, the small contact area between the hard sealing ring and the rubber sealing layer can prevent adhesion caused by excessive contact area during the sealing process; 2. When the pressure in the connection hole is greater than the rated pressure, the gas in the connection hole will push the valve core to move to the right to compress the spring. During the compression process, the hard sealing ring will separate from the rubber sealing layer, and the gas in the connection hole will enter the right side of the valve core through the pressure relief hole, and then be discharged through the elastic groove and the connecting pipe in sequence, so as to achieve the purpose of pressure relief. Attached Figure Description

[0013] Figure 1 This is a side cross-sectional view of a pressure relief valve that is easy to adjust according to this utility model.

[0014] Figure 2 This is a schematic diagram of the valve core of a pressure relief valve that is easy to adjust according to this utility model.

[0015] Icons: 1-Valve body, 2-Valve cavity, 3-Valve core, 4-Connecting hole, 5-Elastic groove, 6-Spring, 7-Hard sealing ring, 8-Pressure relief hole, 9-Connecting pipe, 10-Mounting ring, 11-Mounting nut, 12-Sealing ring, 13-Connecting groove, 14-Adjusting screw hole, 15-Adjusting screw, 16-Top plate, 17-Knob plate, 18-Locking threaded hole, 19-Locking screw, 20-Rubber sealing layer. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] Figures 1 to 2 The following is an embodiment of the present invention.

[0018] Example 1: An easily adjustable pressure relief valve includes a valve body 1, a valve cavity 2 inside the valve body 1, a valve core 3 slidably disposed within the valve cavity 2, a connecting hole 4 communicating with the front side of the valve body 1 on the front wall of the valve cavity 2, an elastic groove 5 recessed in the rear wall of the valve cavity 2, a spring 6 installed in the elastic groove 5, the front end of the spring 6 being contacted with the rear side of the valve core 3, and the rear side of the spring 6 being contacted with the bottom of the elastic groove 5, a hard sealing ring 7 protruding from the front side of the valve core 3, the front side of the hard sealing ring 7 surrounding the connecting hole 4 and sealingly fitting against the front wall of the valve cavity 2, a pressure relief hole 8 communicating with the rear side of the valve core 3 on the outer side of the hard sealing ring 7 on the front side of the valve core 3, and a connecting pipe 9 communicating with the elastic groove 5 on the side of the valve body 1; a rubber sealing layer 20 is disposed on the front wall of the valve cavity 2. By setting a rubber sealing layer 20 and a hard sealing ring 7, the small contact area between the hard sealing ring 7 and the rubber sealing layer 20 can prevent adhesion caused by an excessively large contact area during the sealing process. When the pressure in the connection hole 4 exceeds the rated pressure, the gas in the connection hole 4 will push the valve core 3 backward to compress the spring 6. During the compression process, the hard sealing ring 7 will separate from the rubber sealing layer 20, and the gas in the connection hole 4 will enter the rear side of the valve core 3 through the pressure relief hole 8, and then be discharged through the elastic groove 5 and the connecting pipe 9 in sequence, thus achieving the purpose of pressure relief.

[0019] A mounting ring 10 is provided around the outer wall of the valve body 1. A mounting thread is provided on the front side of the mounting ring 10 around the outer wall of the valve body 1. A mounting nut 11 is connected to the valve body 1 via the mounting thread. A sealing ring 12 is provided on the front side of the mounting ring 10. The mounting ring 10 and mounting nut 11 facilitate the installation of the pressure relief valve onto the housing. A mounting hole is made in the outer wall of the housing. The front end of the valve body 1 is inserted into the mounting hole from the outside of the housing. The mounting nut 11 is then installed onto the front end of the valve body 1 from the inside of the housing. The mounting nut 11 and mounting ring 10 clamp the housing wall, thus completing the installation of the pressure relief valve. The sealing ring 12 seals the connection between the mounting ring 10 and the housing, preventing leakage from this location.

[0020] A connecting groove 13 is recessed in the middle of the rear side of the valve core 3, and multiple pressure relief holes 8 are provided, all of which are connected to the connecting groove 13. By providing the connecting groove 13, the gas in the multiple pressure relief holes 8 can be collected and uniformly gathered in the connecting groove 13.

[0021] The valve body 1 has an adjusting screw hole 14 on its rear side, which communicates with the bottom of the elastic groove 5. An adjusting screw 15 is threaded into the adjusting screw hole 14. The front end of the adjusting screw 15 is placed in the elastic groove 5 and connected to a top plate 16. The rear side of the spring 6 is in contact with the top plate 16. A knob plate 17 is connected to the rear end of the adjusting screw 15 at the rear of the valve body 1. The installation location of the pressure relief valve can affect its accuracy during low-pressure relief. For example, if the pressure relief valve is installed on the side of the housing, the valve core 3 will not be affected by gravity. However, if the pressure relief valve is installed vertically at the bottom of the housing, the pressure on the valve core 3 will cause a difference in the initial thrust on the spring 6 due to gravity compared to the thrust on the spring 6 in the side position. Therefore, by cooperating with the adjusting screw 15 and the adjusting screw hole 14, the pre-compression degree of the spring 6 can be adjusted, thereby controlling the thrust of the spring 6 on the valve core 3 and thus adjusting the rated pressure relief. The knob plate 17 allows for easy control of the position of the adjusting screw 15 within the adjusting screw hole 14. By setting the top plate 16, the contact area with the spring 6 can be increased.

[0022] The valve body 1 has a locking threaded hole 18 on its side that communicates with the adjusting screw hole 14. A locking screw 19 is connected to the internal thread of the locking threaded hole 18. By providing the locking threaded hole 18 and the locking screw 19, it is easy to fix the adjusting screw 15 and prevent the adjusting screw 15 from rotating easily after adjustment is completed.

[0023] The cross-sectional thickness of the rigid sealing ring 7 gradually decreases from the rear to the front. The front end of the rigid sealing ring 7 is set as an arc surface, which can better fit with the rubber sealing layer 20 when it is attached. At the same time, the thinner front end can reduce the contact area between the rigid sealing ring 7 and the rubber sealing layer 20.

[0024] Although the present invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter combination within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A pressure relief valve that is easy to adjust, comprising a valve body (1), characterized in that, The valve body (1) is provided with a valve cavity (2), and a valve core (3) is slidably disposed in the valve cavity (2). The front cavity wall of the valve cavity (2) is provided with a connecting hole (4) that communicates with the front side of the valve body (1). The rear cavity wall of the valve cavity (2) is recessed and provided with an elastic groove (5). A spring (6) is installed in the elastic groove (5). The front end of the spring (6) is in contact with the rear side of the valve core (3), and the rear side of the spring (6) is in contact with the bottom of the elastic groove (5). The valve core (3) has a hard sealing ring (7) protruding on its front side. The front side of the hard sealing ring (7) surrounds the connecting hole (4) and seals against the front wall of the valve cavity (2). The valve core (3) has a pressure relief hole (8) connected to the rear side of the valve core (3) on the outside of the hard sealing ring (7). The valve body (1) has a connecting pipe (9) connected to the elastic groove (5) on its side. The front wall of the valve cavity (2) is provided with a rubber sealing layer (20).

2. The pressure relief valve that is easy to adjust according to claim 1, characterized in that: An installation ring (10) is provided around the outer wall of the valve body (1). An installation thread is provided on the front side of the installation ring (10) around the outer wall of the valve body (1). An installation nut (11) is connected to the valve body (1) through the installation thread. A sealing ring (12) is provided on the front side of the installation ring (10).

3. The pressure relief valve that is easy to adjust according to claim 1, characterized in that: The valve core (3) has a central recessed groove (13) on its rear side, and multiple pressure relief holes (8) are provided, all of which are connected to the groove (13).

4. The pressure relief valve that is easy to adjust according to claim 1, characterized in that: The valve body (1) is provided with an adjusting screw hole (14) that communicates with the bottom of the elastic groove (5) on the rear side. An adjusting screw (15) is threaded into the adjusting screw hole (14). The front end of the adjusting screw (15) is placed in the elastic groove (5) and connected to a top plate (16). The rear side of the spring (6) is in contact with the top plate (16). The rear end of the adjusting screw (15) is connected to a knob plate (17) behind the valve body (1).

5. The pressure relief valve that is easy to adjust according to claim 4, characterized in that: The valve body (1) has a locking thread hole (18) on its side that communicates with the adjusting screw hole (14), and a locking screw (19) is connected to the locking thread hole (18) by its internal thread.

6. The pressure relief valve that is easy to adjust according to claim 1, characterized in that: The cross-sectional thickness of the hard sealing ring (7) gradually decreases from the rear side to the front side.

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