All-welded connection high-pressure inflation valve and working method thereof

Abstract

The invention provides an all-welded connection high-pressure inflation valve and a working method thereof.The all-welded connection high-pressure inflation valve comprises a valve body and a plug cap, the valve body comprises an integrated structure from an inlet to an outlet, the plug cap is arranged at the inlet end of the valve body and welded to the valve body into a whole, and the outlet end of the valve body is connected with a system pipeline in a welded mode; the valve body is of an integrated structure from an inlet to an outlet, the plug cap arranged at the inlet of the valve body and the valve body are welded into a whole, the outlet end of the valve body and the system pipeline are welded into a whole, and the integrated valve body, the plug cap and the system pipeline form the whole-valve-integrated all-welded high-pressure inflation valve, so that zero leakage rate of the high-pressure inflation valve is achieved; the long-term high-pressure storage requirement can be met.

Description

Technical Field

[0001] The present invention relates to the field of valve control technology, and in particular to a fully welded high-pressure inflation valve and a working method thereof. Background Art

[0002] In the attitude and orbit control propulsion system, an inflation valve is required to inflate and deflate the high-pressure container. The ground inflation service valve solution is adopted. When inflating, the handle of the inflation service valve is turned, and the inflation valve is opened through the top rod of the inflation service valve. The steps for exhausting are the same as above.

[0003] The existing patent document with publication number CN110886874A discloses a high-pressure inflation valve, which belongs to the field of valve control technology. It solves the problem that the existing high-pressure inflation valve will spray high-pressure gas and cause danger to people when it is separated from the gas storage device. The high-pressure inflation valve includes a valve seat with an air inlet and an air outlet, a handle structure is installed on the valve seat, an inflation valve core assembly is installed on the valve seat, a deflation port is also opened on the valve seat, and a deflation valve core assembly is also installed on the valve seat. The handle structure can drive the inflation valve core assembly to control the conduction or closure of the above-mentioned air inlet and air outlet, and the handle structure can drive the above-mentioned deflation valve core assembly to control the closure or conduction of the above-mentioned air outlet and deflation port.

[0004] The high-pressure inflation valve in the prior art is prone to leakage when stored at high pressure for a long time in harsh environments (alternating high and low temperatures, transportation vibration, etc.), which affects the inflation and deflation functions of the inflation valve and further affects the reliability of the attitude and orbit control propulsion system. Summary of the invention

[0005] In view of the defects in the prior art, an object of the present invention is to provide a fully welded high-pressure inflation valve and a working method thereof.

[0006] A fully welded high-pressure inflation valve provided according to the present invention includes a valve body and a plugging cap, wherein the valve body includes an integral structure from an inlet to an outlet, the plugging cap is arranged at the inlet end of the valve body and is welded to the valve body as a whole, and the outlet end of the valve body is welded to a system pipeline.

[0007] Preferably, the valve body is provided with a spring seat, a spring, a valve core and a sealing plug in sequence from the outlet to the inlet;

[0008] The plugging cap abuts against the sealing plug, the valve core abuts against one end of the spring, and the other end of the spring is arranged on the spring seat.

[0009] Preferably, a bushing is provided between the valve body and the valve core, the bushing is screwed into and fixed in the valve body, and the valve core and the sealing plug are pressed against the bushing respectively.

[0010] Preferably, a first sealing ring is provided between the sealing plug and the bushing.

[0011] Preferably, the connection between the bushing and the valve core comprises a first cutting edge, the first cutting edge is located on the bushing, and the valve core is pressed against the first cutting edge by the preload force of the spring;

[0012] The connection between the bushing and the sealing plug includes a second cutting edge, the second cutting edge is located on the bushing, and the sealing plug is connected to the second cutting edge under the pressure of the plug cap.

[0013] Preferably, a second sealing ring is provided at the connection between the bushing and the valve body, and at the connection between the bushing and the inflation service valve shaft respectively;

[0014] A retaining ring is provided at the second sealing ring of the bushing and the valve body, and the retaining ring supports the second sealing ring.

[0015] Preferably, the plugging cap is flush with the edge of the valve body, the plugging cap and the valve body are laser welded to form an inlet weld, and the penetration depth of the inlet weld is greater than 1.5 mm.

[0016] Preferably, the outlet end of the high-pressure inflation valve comprises an outlet pipe, and the outlet pipe is welded to the system pipeline to form an outlet weld, and the penetration depth of the outlet weld is greater than 1.5 mm.

[0017] Preferably, a filter screen is further included, wherein the filter screen is arranged in the valve body, one end of the filter screen is connected to the spring seat, and the other end of the filter screen is connected to the outlet pipe.

[0018] The present invention also provides a working method of a fully welded high-pressure inflation valve, comprising the following working stages:

[0019] Before inflation, weld the outlet pipe of the inflation valve to the system pipeline by welding;

[0020] During the inflation stage, the valve core is pushed open by the inflation service valve push rod, and the valve core slides in the bushing to open the air path;

[0021] After the inflation is completed, the valve core is pressed against the first cutting edge of the bushing by the preload force of the spring and the high-pressure gas, and the sealing plug and the first sealing ring are installed;

[0022] During the welding process, high-pressure gas cannot enter the cavity between the plug cap and the valve body. The plug cap and the valve body are welded together by welding to achieve an integrated valve.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention sets the valve body as an integrated structure from the inlet to the outlet, the plugging cap set at the inlet of the valve body is welded to the valve body as a whole, and the outlet end of the valve body is welded to the system pipeline as a whole. The integrated valve body, plugging cap and system pipeline form a fully welded high-pressure inflation valve with an integrated valve, thereby achieving a zero leakage rate of the high-pressure inflation valve and meeting the long-term high-pressure storage requirements;

[0025] 2. The present invention forms a first cutting edge on the bushing at the connection between the bushing and the valve core by screwing the bushing into the valve body. The valve core is pressed against the first cutting edge by the preload force of the spring. A second cutting edge is formed on the bushing at the connection between the bushing and the sealing plug. The sealing plug is connected to the second cutting edge under the pressure of the plug cap. Although the valve core and the sealing plug are not directly connected, the valve core is limited by the indirect connection of the bushing. It is inevitable that the valve body is divided into two parts, which is conducive to the movement of the valve core in the axial direction.

[0026] 3. The present invention provides a hard seal between the sealing plug and the plug cap, and adds a soft seal to the first sealing ring of the sealing plug for redundant sealing. The soft seal of the two second sealing rings provided at the bushing is conducive to preventing high-pressure gas from entering the cavity between the plug cap and the valve body, and avoiding the influence of high-pressure gas on subsequent welding;

[0027] 4. The present invention forms a redundant seal by providing a soft-to-hard seal between the valve core and the valve body, a hard-to-hard seal between the sealing plug and the plug cap, and a sealing ring soft seal, which is conducive to achieving full welding zero leakage rate under long-term harsh high-pressure storage conditions and is conducive to the reliability of the attitude and orbit control propulsion system;

[0028] 5. The present invention provides a filter at the outlet of the inflation valve, and the filtered gas flows into the system pipeline again, thereby avoiding the risk of excess matter entering the system channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0030] Figure 1 A cross-sectional view mainly showing the fully welded high-pressure inflation valve of the present invention;

[0031] Figure 2 It mainly shows the partial view of the connection between the bushing and the sealing plug, and the bushing and the valve core of the present invention;

[0032] Figure 3 It mainly embodies the connection diagram of the high-pressure inflation valve and the inflation service valve of the present invention.

[0033] As shown in the figure:

[0034] Plug cap 1 Spring 9

[0035] Sealing plug 2 Spring seat 10

[0036] First sealing ring 3 filter screen 11

[0037] Valve core 4 System pipeline 12

[0038] Valve body 5 Inlet weld 21

[0039] Second sealing ring 6 outlet weld 22

[0040] Retaining ring 7 First cutting edge 31

[0041] Bushing 8 Second cutting edge 32

[0042] Handle 41 Push rod 42

[0043] Inflator service valve inlet 43 DETAILED DESCRIPTION

[0044] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0045] like Figure 1 As shown, a fully welded high-pressure inflation valve provided according to the present invention includes a valve body 5 and a plugging cap 1. The valve body 5 includes an integrated structure from the inlet to the outlet. The plugging cap 1 is arranged at the inlet end of the valve body 5 and is welded to the valve body 5 as a whole. The outlet end of the valve body 5 is welded to the system pipeline 12.

[0046] The valve body 5 of the present invention is an integrated structure from the inlet to the outlet. The plugging cap 1 arranged at the inlet of the valve body 5 is welded to the valve body 5 as a whole, and the outlet end of the valve body 5 is welded to the system pipeline 12 as a whole. The integrated valve body 5, the plugging cap 1 and the system pipeline 12 form a fully welded high-pressure inflation valve.

[0047] Specifically, Figure 1 and Figure 2As shown, the valve body 5 is an integrated structure from the inlet to the outlet to ensure the reliability of the valve under high pressure conditions. The valve body 5 is sequentially installed with a spring seat 10, a spring 9, a valve core 4 and a sealing plug 2 from the outlet to the inlet; the plug cap 1 abuts against the sealing plug 2, the valve core 4 abuts against one end of the spring 9, and the other end of the spring 9 is arranged on the spring seat 10. A bushing 8 is arranged between the valve body 5 and the valve core 4, the bushing 8 is screwed into and fixed in the valve body 5, and the valve core 4 and the sealing plug 2 are pressed against the bushing 8 respectively. A first sealing ring 3 is arranged between the sealing plug 2 and the bushing 8, and a second sealing ring 6 is arranged at the bushing 8 and the valve body 5 and at the bushing 8 and the inflation service valve connecting shaft respectively. A retaining ring 7 is arranged at the second sealing ring 6 at the bushing 8 and the valve body 5, and the retaining ring 7 supports the second sealing ring 6. The connection between the bushing 8 and the valve core 4 includes a first cutting edge 31, the first cutting edge 31 is located on the bushing 8, and the valve core 4 is pressed against the first cutting edge 31 by the preload force of the spring 9. The connection between the bushing 8 and the sealing plug 2 includes a second cutting edge 32, the second cutting edge 32 is located on the bushing 8, and the sealing plug 2 is connected to the second cutting edge 32 under the pressure of the plug cap 1. The first cutting edge 31 and the second cutting edge 32 are preferably right-angle cutting edges. The outlet end of the high-pressure inflation valve includes an outlet pipe, and the outlet pipe is welded to the system pipeline 12. It also includes a filter screen 11, and the filter screen 11 is preferably a high-strength filter screen 11. The filter screen 11 is arranged in the valve body 5, one end of the filter screen 11 is connected to the spring seat 10, and the other end of the filter screen 11 is connected to the outlet pipe.

[0048] The valve body 5 is sequentially loaded with a high-strength filter screen 11, a spring seat 10, a spring 9, a valve core 4, a second sealing ring 6, a retaining ring 7 and a bushing 8. The valve body 5 is an integrated structure from the inlet to the outlet. The bushing 8 is screwed into the valve body 5 and fixed. The first cutting edge 31 and the second cutting edge 32 are both located on the bushing 8. The sealing plug 2 forms a hard seal with the second cutting edge 32 under the tight pressure of the plug cap 1. At the same time, the first sealing ring 3 of the sealing plug 2 adds a soft seal for redundant sealing. Two second sealing rings 6 are installed at the bushing 8 for sealing. The bushing 8 and the second sealing ring 6 at the valve body 5 are close to the outlet. The retaining ring 7 is added to support the second sealing ring 6 to resist high-pressure deformation and ensure that the high-pressure gas does not leak during the inflation process. The bushing 8 limits the valve core 4 to prevent the valve body 5 from being divided into two parts, thereby ensuring the reliability of the valve under high-pressure conditions.

[0049] Specifically, the outlet pipe is flush with the edge of the system pipeline 12, and the outlet pipe and the system pipeline 12 are laser welded to form an outlet weld 22, and the penetration depth of the outlet weld 22 is greater than 1.5 mm. The plugging cap 1 is flush with the edge of the valve body 5, and the plugging cap 1 and the valve body 5 are laser welded to form an inlet weld 21, and the penetration depth of the inlet weld 21 is greater than 1.5 mm. During welding, there is no high-pressure gas between the plugging cap 1 and the valve body 5, which is conducive to improving the reliability of welding. After welding, the high-pressure inflation valve has a zero leakage rate, which can meet the long-term high-pressure storage requirements.

[0050] The high-pressure inflation valve is divided into upper and lower shells, and the valve core 4 and the valve seat are clamped in the upper and lower shells. The valve body 5 of the present invention is an integrated structure from the inlet to the outlet, which ensures the reliability of the shell under high-pressure conditions and provides reliable sealing for medium- and long-term high-pressure storage. In the case of medium- and long-term high-pressure storage requiring inflation and deflation, the present invention ensures redundant sealing through a soft-to-hard seal of the valve core 4 and the valve body 5, a sealing ring, and a hard-to-hard seal of the sealing plug 2 to prevent high-pressure gas from entering the cavity between the plug cap 1 and the valve body 5. The valve core 4 is fixed and limited by the bushing 8, the cutting edge is located on the bushing 8, and it is sealed by two sealing rings to ensure safety and reliability during the inflation process. During long-term storage under harsh high pressure, zero leakage rate is achieved through full welding to ensure the reliability of the attitude and orbit control propulsion system, which solves the risk of leakage of the previous inflation valve during long-term high-pressure storage in harsh environments.

[0051] The present invention also provides a working method of a fully welded high-pressure inflation valve, comprising the following working stages:

[0052] Before inflation, the outlet pipe of the inflation valve is welded to the system pipeline 12 by welding;

[0053] In the inflation stage, the valve core 4 is pushed open by the inflation service valve push rod 42, and the valve core 4 slides in the bushing 8 to open the air path;

[0054] After the inflation is completed, the valve core 4 is pressed against the first cutting edge 31 of the bushing 8 by the preload force of the spring 9 and the high-pressure gas, and the sealing plug 2 and the first sealing ring 3 are installed;

[0055] During the welding process, high-pressure gas cannot enter the cavity between the plugging cap 1 and the valve body 5. The plugging cap 1 and the valve body 5 are welded together by welding to achieve an integrated valve.

[0056] Before inflation, the outlet pipe of the inflation valve is welded to the system pipeline 12. During the inflation stage, the valve core 4 is pushed open by the push rod 42 of the inflation service valve, and the valve core 4 is slid in the bushing 8 by the push rod 42 of the inflation service valve to open the gas path. The bushing 8 and the valve body 5, and the bushing 8 and the inflation service valve connecting shaft are sealed by two second sealing rings 6 to ensure that the high-pressure gas cannot enter the cavity between the plug cap 1 and the valve body 5 after the inflation is completed, so as to avoid the influence of the high-pressure gas on the subsequent welding. After inflation is completed, the valve core 4 is tightly pressed against the first cutting edge 31 of the bushing 8 by the preload force of the spring 9 and the high-pressure gas. The sealing plug 2 is installed to add a hard seal, and the first sealing ring 3 of the sealing plug 2 is added with a soft seal for redundant sealing, which can meet the needs of multiple inflation and deflation and medium- and long-term storage. During the welding process, the high-pressure gas cannot enter the cavity between the plug cap 1 and the valve body 5. The plug cap 1 and the valve body 5 are welded together through laser welding to realize the integration of the whole valve, ensure zero leakage rate and high-pressure storage in long-term harsh environment, and improve the reliability of the propulsion system.

[0057] like Figure 3 As shown, the outlet of the fully welded high-pressure inflation valve of the present invention is connected to the system pipeline 12 by welding, and the inlet 43 of the inflation service valve is connected to the inflation service valve by threads. When inflation is required, the handle 41 of the inflation service valve is turned to make the top rod 42 of the inflation service valve move to the left, and at the same time drive the valve core 4 to move to the left, overcome the spring force of the high-pressure inflation valve spring 9, and open the high-pressure inflation valve. The high-pressure airflow flows through the inlet of the inflation service valve, flows through the channel of the inflation service valve, and after being filtered by the high-strength filter screen 11 at the outlet of the high-pressure inflation valve, it flows into the system pipeline 12, which avoids the risk of excess matter entering the system pipeline 12.

[0058] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0059] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A fully welded high-pressure inflation valve, characterized in that: The invention comprises a valve body (5) and a plugging cap (1), wherein the valve body (5) comprises an integral structure from an inlet to an outlet, the plugging cap (1) is arranged at the inlet end of the valve body (5) and is welded to the valve body (5) as a whole, and the outlet end of the valve body (5) is welded to a system pipeline (12).

2. The fully welded high pressure inflation valve according to claim 1, characterized in that: The valve body (5) is provided with a spring seat (10), a spring (9), a valve core (4) and a sealing plug (2) in sequence from the outlet to the inlet; The plug cap (1) abuts against the sealing plug (2), the valve core (4) abuts against one end of the spring (9), and the other end of the spring (9) is arranged on the spring seat (10).

3. The fully welded high pressure inflation valve according to claim 2, characterized in that: A bushing (8) is provided between the valve body (5) and the valve core (4); the bushing (8) is screwed into and fixed in the valve body (5); and the valve core (4) and the sealing plug (2) are respectively pressed against the bushing (8).

4. The fully welded high pressure inflation valve according to claim 3, characterized in that: A first sealing ring (3) is arranged between the sealing plug (2) and the bushing (8).

5. The fully welded high pressure inflation valve according to claim 3, characterized in that: The connection between the bushing (8) and the valve core (4) comprises a first cutting edge (31), the first cutting edge (31) is located on the bushing (8), and the valve core (4) is pressed against the first cutting edge (31) by the preload force of the spring (9); The connection between the bushing (8) and the sealing plug (2) comprises a second cutting edge (32), the second cutting edge (32) is located on the bushing (8), and the sealing plug (2) is connected to the second cutting edge (32) under the pressure of the plug cap (1).

6. The fully welded high pressure inflation valve according to claim 3, characterized in that: A second sealing ring (6) is provided at the connection between the bushing (8) and the valve body (5) and at the connection between the bushing (8) and the inflation service valve shaft; A retaining ring (7) is provided between the bushing (8) and the second sealing ring (6) at the valve body (5), and the retaining ring (7) supports the second sealing ring (6).

7. The fully welded high pressure inflation valve according to claim 1, characterized in that: The plugging cap (1) is flush with the edge of the valve body (5); the plugging cap (1) and the valve body (5) are laser welded to form an inlet weld (21); and the penetration depth of the inlet weld (21) is greater than 1.5 mm.

8. The fully welded high pressure inflation valve according to claim 1, characterized in that: The outlet end of the high-pressure inflation valve comprises an outlet pipe, and the outlet pipe is welded to the system pipeline (12) to form an outlet weld (22), and the penetration depth of the outlet weld (22) is greater than 1.5 mm.

9. The fully welded high pressure inflation valve according to claim 8, characterized in that: It also comprises a filter screen (11), wherein the filter screen (11) is arranged in the valve body (5), one end of the filter screen (11) is connected to the spring seat (10), and the other end of the filter screen (11) is connected to the outlet pipe.

10. A working method for a fully welded high-pressure inflation valve, characterized in that: The fully welded high-pressure inflation valve according to any one of claims 1 to 9 comprises the following working stages: Before inflation, the outlet pipe of the inflation valve is welded to the system pipeline (12) by welding; During the inflation stage, the valve core (4) is pushed open by the inflation service valve push rod, and the valve core (4) slides in the bushing (8) to open the air path; After the inflation is completed, the valve core (4) is pressed against the first cutting edge (31) of the bushing (8) by the preload force of the spring (9) and the high-pressure gas, and the sealing plug (2) and the first sealing ring (3) are installed; During the welding process, high-pressure gas cannot enter the cavity between the plugging cap (1) and the valve body (5), and the plugging cap (1) and the valve body (5) are welded together to achieve an integrated valve.

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