Multi-layer sealing adjustable automatic pressure relief safety valve

Abstract

The utility model discloses a multi-layer sealing adjustable automatic pressure relief safety valve which comprises an upper valve body and a lower valve body, an adjusting rod mechanism is arranged on the upper portion of the upper valve body, a spring mechanism is arranged in the upper valve body, an ejector rod mechanism is arranged in the lower valve body, and the upper end of the ejector rod mechanism is matched with the lower end of the spring mechanism in an abutting mode. The upper end of the spring mechanism is matched with the adjusting rod mechanism in an abutting mode, a valve seat is further arranged in the lower valve body, a valve element is arranged in the valve seat, and the upper end of the valve element is matched with the lower end of the ejector rod mechanism in an abutting mode. At least one layer of sealing ring is arranged between the lower valve body and the ejector rod mechanism, and at least one layer of sealing ring is arranged between the lower valve body and the valve seat. The utility model has the advantages that the structure is simple, and the operation is convenient; medium leakage can be prevented, and the sealing performance of the valve body is guaranteed. And the service life of the adjusting rod mechanism can be prolonged, so that the service life of the whole pressure relief safety valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure relief safety valves, in particular to a multi-layer sealed adjustable automatic pressure relief safety valve. Background Art

[0002] Pressure relief safety valves are generally installed in pneumatic or hydraulic systems to protect the safety of closed system equipment or pipelines. The pressure relief safety valve can automatically open and close according to the working pressure of the system. When the system pressure is higher than the opening pressure of the pressure relief safety valve, the pressure relief safety valve opens to release the pressure in the system. When the pressure in the system drops to the return pressure of the pressure relief safety valve, the pressure relief safety valve closes. However, the use of traditional pressure relief safety valves generally has the following defects: the structure is relatively complex, the installation and disassembly are cumbersome, and it is not convenient for subsequent maintenance. In addition, the pressure regulating head is usually directly exposed to the outside and is easily affected by the external environment, such as rust, which makes it difficult to adjust the pressure of the pressure relief pressure later, thus shortening the service life of the pressure relief safety valve. Utility Model Content

[0003] The purpose of the utility model is to provide a multi-layer sealed adjustable automatic pressure relief safety valve, which is used to solve the technical problems existing in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A multi-layer sealed adjustable automatic pressure relief safety valve comprises an upper valve body and a lower valve body, an adjusting rod mechanism is provided on the upper part of the upper valve body, and a spring mechanism is provided inside the upper part, a push rod mechanism is provided inside the lower valve body, and the upper end of the push rod mechanism is in conflict with the lower end of the spring mechanism, and the upper end of the spring mechanism is in conflict with the adjusting rod mechanism, a valve seat is also provided inside the lower valve body, a valve core is provided inside the valve seat, and the upper end of the valve core is in conflict with the lower end of the push rod mechanism, and at least one layer of sealing ring is provided between the lower valve body and the push rod mechanism, and between the lower valve body and the valve seat.

[0006] Furthermore, the lower portion of the upper valve body is threadedly connected to the upper portion of the lower valve body.

[0007] Furthermore, the push rod mechanism includes a push rod and a guide seat, the upper end of the push rod abuts against the lower end of the spring mechanism, and the lower end is movably arranged inside the guide seat, and at least one sealing ring is respectively provided between the outer wall of the guide seat and the inner wall of the lower valve body, and between the inner wall of the guide seat and the outer wall of the push rod.

[0008] Furthermore, the spring mechanism includes an upper spring seat, a lower spring seat and a spring. The upper spring seat is arranged at the upper end of the spring and is connected in contact with the adjusting rod mechanism. The lower spring seat is arranged at the lower end of the spring and is connected in contact with the top rod of the top rod mechanism.

[0009] Furthermore, an upper countersunk hole is provided at the center of the upper end of the upper spring seat, a steel ball is provided in the upper countersunk hole, and the upper spring seat is connected to the adjusting rod mechanism through the steel ball.

[0010] Furthermore, a sinking hole is provided at the center of the lower end of the lower spring seat, and the tip of the ejector rod of the ejector rod mechanism abuts against the inside of the sinking hole.

[0011] Furthermore, the adjusting rod mechanism includes an adjusting rod, a locking nut and a cap, the locking nut is threadedly sleeved on the outside of the adjusting rod, the cap is threadedly sleeved on the outside of the locking nut and the adjusting rod, one end of the adjusting rod extends inside the cap, and the other end passes through the locking nut and the upper end of the upper valve body in sequence, and extends into the upper countersunk hole of the upper spring seat and contacts the steel ball.

[0012] Furthermore, a pressure relief port is provided on the side of the lower valve body.

[0013] Compared with the prior art, the advantages of the present invention are as follows:

[0014] (1) The pressure of the safety valve is adjusted by combining a push rod and a spring, which has a simple structure and is easy to operate.

[0015] (2) By using multiple layers of sealing rings on the contact part between the valve body and the valve seat, it can prevent the leakage of the medium and ensure the sealing of the valve body.

[0016] (3) By providing a cap on the outside of the adjusting rod and the locking nut, the adjusting rod and the locking nut are protected, thereby avoiding the problems of rusting of the adjusting rod and the locking nut due to direct exposure to the external environment, and effectively extending the service life of the adjusting rod mechanism.

[0017] (4) The various components of the safety valve are connected by threaded connection, which is easy to install and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution in this embodiment, the following is a brief introduction to the drawings required for the description of the embodiment. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a structural diagram of a specific embodiment of the utility model multi-layer sealing adjustable automatic pressure relief safety valve;

[0020] Figure 2 yes Figure 1 Partial schematic Figure 1 ;

[0021] Figure 3 yes Figure 1 Partial schematic Figure 2 ;

[0022] Figure 4 is a schematic diagram of the spring mechanism;

[0023] Figure 5 is a schematic diagram of the ejector mechanism;

[0024] Figure 6 It is a schematic diagram of the assembly of the valve core and the valve seat;

[0025] Explanation of the accompanying reference numerals: 1. Upper valve body; 2. Lower valve body; 3. Valve seat; 4. Valve core; 5. Push rod mechanism; 501. Push rod; 502. Guide seat; 6. Spring mechanism; 601. Upper spring seat; 602. Spring; 603. Lower spring seat; 7. Adjusting rod mechanism; 701. Adjusting rod; 702. Locking nut; 703. Cover cap; 8. Sealing ring; 9. Steel ball; 10. Pressure relief port. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the following further describes how the present invention is implemented in conjunction with the accompanying drawings and specific implementation methods.

[0027] See Figures 1 to 6 , a specific embodiment of the multi-layer seal adjustable automatic pressure relief safety valve of the present invention, comprises an upper valve body 1 and a lower valve body 2. An adjusting rod mechanism 7 is provided on the upper portion of the upper valve body 1, and a spring mechanism 6 is provided inside the upper portion. A push rod mechanism 5 is provided inside the lower valve body 2, and the upper end of the push rod mechanism 5 abuts against the lower end of the spring mechanism 6, and the upper end of the spring mechanism 6 abuts against the adjusting rod mechanism 7. A valve seat 3 is also provided inside the lower valve body 2, and a valve core 4 is provided inside the valve seat 3, and the upper end of the valve core 4 abuts against the lower end of the push rod mechanism 5. At least one sealing ring 8 is provided between the lower valve body 2 and the push rod mechanism 5, and between the lower valve body 2 and the valve seat 3. The pressure regulating rod mechanism 7 is used to push the spring mechanism 6 downward or upward to adjust the initial pressure relief value of the safety valve; the push rod mechanism 5 is used to press against the spring mechanism 6.

[0028] Specifically, in the above embodiment, the lower portion of the upper valve body 1 is connected to the upper portion of the lower valve body 2 by threaded engagement.

[0029] Specifically, in the above-mentioned specific embodiment, the push rod mechanism 5 includes a push rod 501 and a guide seat 502. The upper end of the push rod 501 abuts against the lower end of the spring mechanism 6, and the lower end is movably arranged inside the guide seat 502. At least one sealing ring 8 is respectively provided between the outer wall of the guide seat 502 and the inner wall of the lower valve body 2, and between the inner wall of the guide seat 502 and the outer wall of the push rod 501.

[0030] Specifically, in the above-mentioned specific embodiment, the spring mechanism 6 includes an upper spring seat 601, a lower spring seat 603 and a spring 602. The upper spring seat 601 is arranged at the upper end of the spring 602 and is in contact with the adjusting rod mechanism 7. The lower spring seat 603 is arranged at the lower end of the spring 602 and is in contact with the top rod 501 of the top rod mechanism 5.

[0031] Specifically, in the above embodiment, an upper countersunk hole 601 a is provided at the center of the upper end of the upper spring seat 601 , a steel ball 9 is provided in the upper countersunk hole 601 a , and the upper spring seat 601 is connected to the adjusting rod mechanism 7 through the steel ball 9 .

[0032] Specifically, in the above embodiment, a sinking hole 603 a is provided at the center of the lower end of the lower spring seat 603 , and the tip of the ejector rod 501 of the ejector rod mechanism 5 abuts against the inside of the sinking hole 603 a .

[0033] Specifically, in the above-described embodiment, the adjusting rod mechanism 7 includes an adjusting rod 701, a locking nut 702, and a cap 703. The locking nut 702 is threadedly mounted on the exterior of the adjusting rod 701, and the cap 703 is threadedly mounted on the exterior of the locking nut 702 and the adjusting rod 701. One end of the adjusting rod 701 extends into the cap 703, and the other end passes through the locking nut 702 and the upper end of the upper valve body 1, and then extends into the upper countersunk hole 601a of the upper spring seat 601, where it contacts the steel ball 9. During use, by adjusting the locking nut 702, the adjusting rod 701 can push the upper spring seat 601 downward or upward to adjust the initial pressure relief value. The cap 703 effectively protects the adjusting rod 701 and the locking nut 702, preventing them from being affected by the external environment, causing rust, contamination, and other problems that could affect the performance of the adjusting rod mechanism 7.

[0034] Specifically, in the above embodiment, a pressure relief port 10 is provided on the side of the lower valve body 2 to achieve the effect of rapid pressure relief.

[0035] The working principle of the utility model multi-layer sealing adjustable automatic pressure relief safety valve is as follows:

[0036] Before use, the initial elastic force of the spring mechanism 6 can be changed by adjusting the locking nut 702 to move the adjusting rod 701 upward or downward, thereby adjusting the initial pressure relief value of the safety valve.

[0037] When working, under the initial elastic force of the spring mechanism 6, the push rod 501 in the push rod mechanism 5 is pushed downward, causing the valve core 4 to move downward and block the liquid (or gas) outlet of the valve seat 3. When the pressure of the liquid (or gas) inlet of the valve seat 3 is greater than the liquid (or gas) outlet, the liquid (gas) pressure in the valve seat 3 will overcome the initial elastic force of the spring mechanism 6, thereby pushing the valve core 4 upward, causing the liquid outlet of the valve seat 3 to open. Subsequently, the liquid (or gas) in the valve seat 3 will flow from the liquid outlet of the valve seat 3 into the lower valve body 2, and then flow out from the pressure relief port 10 on the side of the lower valve body 2, thereby completing the pressure relief. When the liquid (or gas) pressure in the valve seat 3 after the pressure relief is less than the initial elastic force of the spring mechanism 6, the spring mechanism 6 will push the push rod 501 in the push rod mechanism 5 to move downward, causing the valve core 4 to move downward and block the liquid (or gas) outlet of the valve seat 3.

[0038] Finally, it should be noted that the above description is only an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multi-layer seal adjustable automatic pressure relief safety valve, comprising an upper valve body (1) and a lower valve body (2), characterized in that: The upper valve body (1) is provided with an adjusting rod mechanism (7) at its upper part and a spring mechanism (6) is provided inside the upper valve body; the lower valve body (2) is provided with a push rod mechanism (5) inside the lower valve body, and the upper end of the push rod mechanism (5) is in contact with the lower end of the spring mechanism (6), and the upper end of the spring mechanism (6) is in contact with the adjusting rod mechanism (7); the lower valve body (2) is also provided with a valve seat (3) inside the lower valve body, and a valve core (4) is provided inside the valve seat (3), and the upper end of the valve core (4) is in contact with the lower end of the push rod mechanism (5); at least one layer of sealing ring (8) is provided between the lower valve body (2) and the push rod mechanism (5), and between the lower valve body (2) and the valve seat (3).

2. The multi-layer sealing adjustable automatic pressure relief safety valve according to claim 1 is characterized in that: The lower part of the upper valve body (1) is threadably connected to the upper part of the lower valve body (2).

3. The multi-layer sealing adjustable automatic pressure relief safety valve according to claim 1 is characterized in that: The push rod mechanism (5) comprises a push rod (501) and a guide seat (502); the upper end of the push rod (501) abuts against the lower end of the spring mechanism (6), and the lower end is movably arranged inside the guide seat (502); at least one sealing ring (8) is respectively arranged between the outer wall of the guide seat (502) and the inner wall of the lower valve body (2), and between the inner wall of the guide seat (502) and the outer wall of the push rod (501).

4. The multi-layer sealing adjustable automatic pressure relief safety valve according to claim 3 is characterized in that: The spring mechanism (6) comprises an upper spring seat (601), a lower spring seat (603) and a spring (602); the upper spring seat (601) is arranged at the upper end of the spring (602) and is in contact with the adjusting rod mechanism (7); the lower spring seat (603) is arranged at the lower end of the spring (602) and is in contact with the push rod (501) of the push rod mechanism (5).

5. The multi-layer sealing adjustable automatic pressure relief safety valve according to claim 4 is characterized in that: An upper countersunk hole (601a) is provided at the center of the upper end of the upper spring seat (601), a steel ball (9) is provided in the upper countersunk hole (601a), and the upper spring seat (601) is abuttingly connected to the adjusting rod mechanism (7) via the steel ball (9).

6. The multi-layer seal adjustable automatic pressure relief safety valve according to claim 4 is characterized in that: A sinking hole (603a) is provided at the center of the lower end of the lower spring seat (603), and the tip of the ejector rod (501) of the ejector rod mechanism (5) abuts against the inside of the sinking hole (603a).

7. The multi-layer seal adjustable automatic pressure relief safety valve according to claim 5, characterized in that: The adjusting rod mechanism (7) comprises an adjusting rod (701), a locking nut (702) and a cover cap (703); the locking nut (702) is threadedly sleeved on the outside of the adjusting rod (701); the cover cap (703) is threadedly sleeved on the outside of the locking nut (702) and the adjusting rod (701); one end of the adjusting rod (701) is inserted into the cover cap (703); the other end passes through the locking nut (702) and the upper end of the upper valve body (1) in sequence, and extends into the upper countersunk hole (601a) of the upper spring seat (601) and contacts the steel ball (9).

8. The multi-layer sealing adjustable automatic pressure relief safety valve according to claim 1 is characterized in that: A pressure relief port (10) is provided on the side of the lower valve body (2).

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