Non-backflow nitrogen supply valve

Abstract

The utility model provides a non-backflow nitrogen supply valve which comprises a nitrogen supply valve body provided with a valve cavity structure and a valve element, a valve body sealing seat installed in the middle of the top end of the nitrogen supply valve body, an executing mechanism arranged at the top end of the valve body sealing seat, a director arranged at the top end of the executing mechanism, and a sealing part. The sealing component comprises two outer sealing connecting sleeves and two conducting columns, and the two conducting columns are arranged at the position of a pressure guiding cavity in the top end of the first flange part and the position of a pressure guiding cavity in the top end of the second flange part. The two conducting columns are arranged at the pressure guiding cavity at the top end of the first flange part and the pressure guiding cavity at the top end of the second flange part, each outer sealing connecting sleeve punctures the puncture rubber column through the flow guide needle cylinder and is in transition fit with the corresponding conducting column, and therefore good connecting sealing performance is achieved, and the possibility of leakage in the connecting process is prevented.

Description

Technical Field

[0001] This utility model belongs to the technical field of nitrogen supply valves and relates to a non-backflow nitrogen supply valve. Background Technology

[0002] Nitrogen supply valves commonly use self-operated pressure regulating valves. These valves (also known as self-operated pressure control valves) require no external power source and can operate in locations without electricity or gas. They utilize the energy of the regulated medium itself as a power source, which is then introduced into the actuator to control the valve core position, altering the pressure difference and flow rate across the valve, thus stabilizing the pressure upstream (or downstream) of the valve. Self-operated pressure control valves are widely used for automatic pressure reduction and stabilization, or pressure relief and stabilization, of gas, liquid, and steam media. Their main applications include micro-pressure control of various industrial gases such as nitrogen sealing in storage tanks, coal gas, natural gas, liquefied petroleum gas, oxygen, and nitrogen.

[0003] Existing technology, such as the non-backflow nitrogen supply valve disclosed in patent publication number CN216895961U, includes a main valve assembly, an actuator, and a pilot device. The valve inlet of the main valve assembly is equipped with a check valve connected to the pilot device. The check valve includes a check valve body, a soft-seal valve core, a spring, a spring seat, and an adjusting sleeve. This non-backflow nitrogen supply valve, by setting a check valve at the valve inlet of the main valve assembly, and the check valve having a soft-seal valve core inside, ensures that the nitrogen sealing gas in the storage tank flows back into the pipeline when there is no pressure at the valve inlet of the main valve assembly. Because the gas in the storage tank is under low pressure, the check valve and its internal soft-seal valve core ensure that the gas does not flow back, resulting in a good sealing effect.

[0004] The disadvantage of the nitrogen supply valve disclosed in this scheme is that its pressure chamber is connected to a check valve, which uses a conventional threaded connection, resulting in poor sealing. Therefore, we designed a non-backflow nitrogen supply valve. Summary of the Invention

[0005] The purpose of this invention is to provide a non-backflow nitrogen supply valve to solve the problems mentioned in the background art.

[0006] The objective of this utility model can be achieved through the following technical solution: A non-backflow nitrogen supply valve includes a nitrogen supply valve body with a valve cavity structure and a valve core. The valve body has an integrally formed first flange and a second flange at both ends. A valve body sealing seat is installed at the middle of the top of the valve body. An actuator is installed at the top of the valve body sealing seat, and a pilot device is installed at the top of the actuator. The valve body also includes a sealing component, which comprises two outer sealing connecting sleeves and two guide posts. The two guide posts are located at the pressure-applying chambers at the top of the first flange and the second flange. A piercing rubber column is fixedly installed in the channel of the two guide posts. A flow-guiding syringe is installed inside the two outer sealing connecting sleeves. Each outer sealing connecting sleeve pierces the piercing rubber column through the flow-guiding syringe, causing the outer sealing connecting sleeve to transition into the guide post. A flow-guiding pipe is provided at the top of each of the two outer sealing connecting sleeves.

[0007] In the aforementioned non-backflow nitrogen supply valve, threaded sealing portions are provided at the bottom of both guide posts, and these threaded sealing portions are connected to the threaded portion of the outer sealing connecting sleeve. This design aims to further enhance the sealing performance of the connection.

[0008] In the aforementioned non-backflow nitrogen supply valve, a filter plate mounting port is provided at the inlet of the second flange. A nitrogen filter plate is snap-fitted into the interior of the filter plate mounting port, and an operating rod is provided at the snap-fit ​​block of the nitrogen filter plate. This design aims to achieve a good filtration effect, removing moisture or impurities from the nitrogen gas.

[0009] In the aforementioned non-backflow nitrogen supply valve, a nitrogen outlet connecting pipe is provided at one end of the first flange, a pressure gauge mounting base is provided at the top of the nitrogen outlet connecting pipe, and a spring-loaded pressure gauge connected to the nitrogen outlet connecting pipe is installed on the side of the pressure gauge mounting base; a connecting neck is provided at the end of the nitrogen outlet connecting pipe, and a hexagonal mounting part is installed at one end of the connecting neck. This design aims to achieve good pressure measurement, allowing the discharged nitrogen gas to detect pressure changes.

[0010] Compared with the prior art, the advantages of the non-backflow nitrogen supply valve of this utility model are as follows: by setting the sealing component including two outer sealing connecting sleeves and two guiding columns, the two guiding columns are set at the pressure-inducing cavity at the top of the first flange and the pressure-inducing cavity at the top of the second flange. A piercing rubber column is fixedly set in the channel of the two guiding columns. A guide needle is set on the inner side of the two outer sealing connecting sleeves. Each outer sealing connecting sleeve is pierced by the guide needle and the outer sealing connecting sleeve transitionally fits the guiding column. This has good connection sealing performance and prevents the possibility of leakage during the connection process. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of a non-backflow nitrogen supply valve according to this utility model.

[0012] Figure 2 This is a three-dimensional structural diagram of the second flange of a non-backflow nitrogen supply valve according to this utility model.

[0013] Figure 3 This is a three-dimensional structural diagram of a non-backflow nitrogen supply valve spring-type pressure gauge according to this utility model.

[0014] In the diagram, 1. Nitrogen supply valve body; 2. First flange; 3. Second flange; 4. Outer sealing sleeve; 5. Valve body sealing seat; 6. Actuator; 7. Pilot; 8. Guide column; 9. Puncture rubber column; 10. Guide syringe; 11. Guide pipeline; 12. Threaded seal; 13. Filter plate mounting port; 14. Nitrogen filter plate; 15. Operating lever; 16. Nitrogen outlet connecting pipe; 17. Spring-loaded pressure gauge; 18. Pressure gauge mounting base; 19. Connecting neck; 20. Hexagonal mounting part. Detailed Implementation

[0015] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0016] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a non-backflow nitrogen supply valve;

[0017] Example 1: The nitrogen supply valve includes a valve body 1 with a valve cavity structure and a valve core. A first flange 2 and a second flange 3 are integrally formed at both ends of the valve body 1. A valve body sealing seat 5 is installed at the middle of the top of the valve body 1. An actuator 6 is installed at the top of the valve body sealing seat 5, and a pilot device 7 is installed at the top of the actuator 6. The valve body also includes a sealing component, which includes two outer sealing connecting sleeves 4 and two guide pillars 8. The two guide pillars 8 are located at the pressure-applying chambers at the top of the first flange 2 and the second flange 3. A piercing rubber column 9 is fixedly installed in the channel of the two guide pillars 8. A flow-guiding syringe 10 is installed inside the two outer sealing connecting sleeves 4. Each outer sealing connecting sleeve 4 is pierced by the flow-guiding syringe 10 through the piercing rubber column 9, allowing the outer sealing connecting sleeve 4 to transition into the guide pillar 8. A flow-guiding pipe 11 is installed at the top of each of the two outer sealing connecting sleeves 4.

[0018] Among them: such as Figure 2 As shown, in order to better perform the sealing operation, the bottom of both guide posts 8 are provided with threaded sealing parts 12, which are connected to the threaded part of the outer sealing connecting sleeve 4.

[0019] The structural design of this solution has good connection sealing performance, preventing the possibility of leakage during the connection process.

[0020] Example 2: The nitrogen supply valve includes a valve body 1 with a valve cavity structure and a valve core. The valve body 1 has an integrally formed first flange 2 and a second flange 3 at both ends. A valve body sealing seat 5 is installed at the middle of the top of the valve body 1. An actuator 6 is installed at the top of the valve body sealing seat 5, and a pilot device 7 is installed at the top of the actuator 6. The valve body 1 also includes a sealing component, which includes two outer sealing connecting sleeves 4 and two guide pillars 8. The two guide pillars 8 are located at the pressure-applying chambers at the top of the first flange 2 and the second flange 3. A piercing rubber column 9 is fixedly installed in the channel of the two guide pillars 8. A flow-guiding syringe 10 is installed inside the two outer sealing connecting sleeves 4. Each outer sealing connecting sleeve 4 is pierced by the flow-guiding syringe 10 through the piercing rubber column 9, allowing the outer sealing connecting sleeve 4 to transition into the guide pillar 8. A flow-guiding pipe 11 is installed at the top of each of the two outer sealing connecting sleeves 4. A filter plate mounting port 13 is provided at the inlet of the second flange 3. A nitrogen filter plate 14 is snapped into the inside of the filter plate mounting port 13. An operating rod 15 is provided at the snap-fit ​​block of the nitrogen filter plate 14.

[0021] As a third embodiment of this solution: the nitrogen supply valve includes a nitrogen supply valve body 1 with a valve cavity structure and a valve core. The two ends of the nitrogen supply valve body 1 are respectively provided with an integrally formed first flange 2 and a second flange 3. A valve body sealing seat 5 is installed in the middle of the top of the nitrogen supply valve body 1. An actuator 6 is provided at the top of the valve body sealing seat 5. A pilot device 7 is provided at the top of the actuator 6. It also includes a sealing component, which includes two outer sealing connecting sleeves 4 and two guide pillars 8. The two guide pillars 8 are located at the pressure-inducing cavity at the top of the first flange 2 and the pressure-inducing cavity at the top of the second flange 3. A piercing rubber column 9 is fixedly provided in the channel of the two guide pillars 8. A flow guiding syringe 10 is provided on the inner side of the two outer sealing connecting sleeves 4. Each outer sealing connecting sleeve 4 is pierced by the piercing rubber column 9 through the flow guiding syringe 10, so that the outer sealing connecting sleeve 4 transitionally fits the guide pillar 8. A flow guiding pipe 11 is provided at the top of each of the two outer sealing connecting sleeves 4. A nitrogen outlet connecting pipe 16 is provided at one end of the first flange 2. A pressure gauge mounting base 18 is provided at the top of the nitrogen outlet connecting pipe 16. A spring-type pressure gauge 17 connected to the nitrogen outlet connecting pipe 16 is installed on the side of the pressure gauge mounting base 18. A connecting neck 19 is provided at the end of the nitrogen outlet connecting pipe 16. A hexagonal mounting part 20 is installed at one end of the connecting neck 19.

[0022] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. A non-backflow nitrogen supply valve, comprising a nitrogen supply valve body (1) having a valve cavity structure and a valve core, wherein an integrally formed first flange portion (2) and a second flange portion (3) are respectively provided at both ends of the nitrogen supply valve body (1), a valve body sealing seat (5) is installed at the middle of the top of the nitrogen supply valve body (1), an actuator (6) is provided at the top of the valve body sealing seat (5), and a pilot device (7) is provided at the top of the actuator (6), characterized in that, It also includes a sealing component, which includes two outer sealing connecting sleeves (4) and two guide pillars (8). The two guide pillars (8) are located at the pressure-inducing cavity at the top of the first flange (2) and at the pressure-inducing cavity at the top of the second flange (3). A puncture rubber column (9) is fixedly installed in the channel of the two guide pillars (8). A flow guide syringe (10) is installed on the inner side of the two outer sealing connecting sleeves (4). Each outer sealing connecting sleeve (4) is punctured by the flow guide syringe (10) into the puncture rubber column (9) and the outer sealing connecting sleeve (4) transitionally fits the guide pillar (8).

2. The non-backflow nitrogen supply valve according to claim 1, characterized in that, Both of the two guide posts (8) are provided with threaded sealing parts (12) at their bottoms, and the threaded sealing parts (12) are connected to the threaded part of the outer sealing connecting sleeve (4).

3. The non-backflow nitrogen supply valve according to claim 1, characterized in that, The second flange (3) is provided with a filter plate mounting port (13) at its inlet. A nitrogen filter plate (14) is snapped into the inside of the filter plate mounting port (13). An operating rod (15) is provided at the snap-fit ​​block of the nitrogen filter plate (14).

4. A non-backflow nitrogen supply valve according to claim 1, characterized in that, One end of the first flange (2) is provided with a nitrogen outlet connecting pipe (16), the top end of the nitrogen outlet connecting pipe (16) is provided with a pressure gauge mounting base (18), and a spring-type pressure gauge (17) connected to the nitrogen outlet connecting pipe (16) is installed on the side of the pressure gauge mounting base (18).

5. A non-backflow nitrogen supply valve according to claim 4, characterized in that, The end of the nitrogen outlet connecting pipe (16) is provided with a connecting neck (19), and a hexagonal mounting part (20) is installed at one end of the connecting neck (19).

6. A non-backflow nitrogen supply valve according to claim 1, characterized in that, Both of the outer sealing connecting sleeves (4) are provided with flow guiding pipes (11) at their top ends.

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