Pressure reducing valve for air guns

Abstract

The application discloses a pressure reducing valve for an air gun and relates to the technical field of pressure reducing valves.The pressure reducing valve comprises a body of the pressure reducing valve, an air inlet pipeline for connecting a high-pressure air tank is arranged on the body, a first threaded section and a second threaded section are sequentially arranged on the air inlet pipeline in an axial direction, a driving ring is screwed on the first threaded section, an extrusion ring is arranged on the outer wall of the air inlet pipeline in an axial sliding mode, the extrusion ring is rotationally connected with the driving ring, a sealing ring is arranged on the extrusion ring, an inner threaded section is arranged on the inner wall of the tank opening of the high-pressure air tank, the high-pressure air tank is mounted on the air inlet pipeline when the inner threaded section is screwed with the second threaded section, and the sealing work is performed by moving the sealing ring to the position to be sealed between the air inlet pipeline and the high-pressure air tank under the power of the driving ring after the high-pressure air tank is completely connected with the air inlet pipeline.

Description

Technical Field

[0001] This invention relates to the technical field of pressure reducing valves, specifically a pressure reducing valve for an air gun. Background Technology

[0002] As is generally known, an air gun is a light weapon powered by pressurized gas and requiring no gunpowder. It propels a projectile using compressed gas pressure. A pressure-reducing valve and a high-pressure gas tank provide the firing gas, which is then released mechanically by pulling the trigger. The firing process includes: Gas storage and pressurization: A high-pressure gas tank, in conjunction with a pressure reducing valve, supplies gas, which is stored in the cylinder to form high pressure; a compression valve separates the normal pressure and high-pressure areas, and the cylinder and barrel are connected by a gas passage; Projectile loading: After the high-pressure gas is prepared, the projectile is placed in the chamber, and the push rod is pulled to push the projectile to the firing position; Mechanical energy storage and locking: Pulling the push rod simultaneously moves the hammer backward to compress the spring and store energy. The spring cover at the rear end of the cylinder is sealed to prevent leakage. The spring and hammer constitute the triggering mechanism, and the bolt locks after loading is completed; Firing: Pulling the trigger releases the high-pressure gas in the cylinder. The gas expands instantaneously to form a high-pressure wave, which propels the projectile out of the barrel at high speed.

[0003] The pressure reducing valve is a self-operated pressure regulating valve that relies on the energy of the medium itself to stably reduce the upstream high pressure to the downstream set low pressure. It is unaffected by fluctuations in inlet pressure and flow rate, protecting downstream equipment from overpressure damage. However, its drawback is that when the air gun uses a high-pressure gas tank to provide the firing gas source, the volume of the high-pressure gas tank should not be too large to avoid affecting the operation of the air gun. Therefore, the gas in the high-pressure gas tank has a short service life and the high-pressure gas tank needs to be replaced frequently. This leads to frequent disassembly and reassembly of the high-pressure gas tank and the pressure reducing valve. Since the high-pressure gas tank and the pressure reducing valve are fixed by screws, the sealing ring between them will be frequently subjected to circumferential friction during disassembly and reassembly, causing the sealing ring to wear too quickly, affecting its sealing effect and service life. Summary of the Invention

[0004] The purpose of this invention is to provide a pressure reducing valve for air guns, solving the technical problems in related technologies. To achieve the above objective, this invention provides the following technical solution: A pressure reducing valve for an air gun includes a valve body with an inlet pipe for connecting a high-pressure air canister. The inlet pipe has a first threaded section and a second threaded section sequentially arranged along the axial direction. A drive ring is screwed onto the first threaded section. A compression ring is slidably provided along the axial direction on the outer wall of the inlet pipe, and the compression ring is rotatably connected to the drive ring. A sealing ring is installed on the compression ring. The inner wall of the high-pressure air canister opening has an internal threaded section. When the internal threaded section is screwed onto the second threaded section, the high-pressure air canister is installed on the inlet pipe. After the high-pressure air canister is fully connected to the inlet pipe, the compression ring, driven by the drive ring, pushes the sealing ring to the position where the inlet pipe and the high-pressure air canister need to be sealed for sealing.

[0005] As described above, an annular groove is formed on the inner wall of the drive ring, and two transmission blocks are slidably arranged in the annular groove. Both transmission blocks are connected to the extrusion ring. During the axial movement of the drive ring along the intake pipe, the extrusion ring moves axially along with the drive ring based on the cooperation between the transmission blocks and the annular groove.

[0006] As mentioned above, the outer wall of the drive ring is provided with several anti-slip textures along the circumferential direction.

[0007] As described above, the outer wall of the high-pressure gas tank opening is provided with an external thread section, the external thread section having the opposite helical direction to the internal thread section; during the sealing operation stroke where the extrusion ring pushes the sealing ring to the position where the air inlet pipe and the high-pressure gas tank need to be sealed, the drive ring is screwed to the external thread section.

[0008] As mentioned above, the position of the internal thread segment and the position of the external thread segment are staggered in the axial direction of the high-pressure gas tank.

[0009] As mentioned above, sealing grooves are arranged at the locations where sealing is required between the air intake pipe and the high-pressure gas tank. When the sealing ring is squeezed by the compression ring and undergoes elastic deformation, the sealing ring is embedded in the sealing groove.

[0010] The sealing ring described above has a gourd-shaped structure with a smaller top and a larger bottom. Its small end is snapped onto the compression ring. Based on the compression action of the compression ring, the large end undergoes elastic deformation to seal the air intake pipe and the high-pressure gas tank.

[0011] As described above, the first threaded section is axially slidably arranged on the outer wall of the intake pipe, and a first elastic element is provided between the first threaded section and the intake pipe in the sliding direction.

[0012] As described above, the drive ring comprises two arc-shaped parts, which are connected by a telescopic rod with elastic telescopic function, and the two parts are restricted from separation by a limiting member.

[0013] The aforementioned limiting member includes a limiting groove formed on each part of the drive ring, and a limiting block is slidably provided on one part of it in the radial direction. In the sliding direction, a second elastic member is provided between the limiting block and the drive ring. When the two parts of the drive ring need to be merged, the limiting block is inserted into the limiting groove on both parts of the drive ring. When the two parts of the drive ring need to be separated, the limiting block is disengaged from the limiting groove by pressing it, and the two parts of the drive ring move away from each other based on the rebound force of the telescopic rod.

[0014] The beneficial effects of this invention are as follows: by first using the internal thread section and the second thread section to screw together, the connection between the pressure reducing valve inlet pipe and the high-pressure gas tank is completed. Then, by rotating the drive ring, the compression ring is moved to the position where the inlet pipe and the high-pressure gas tank need to be sealed. For the connection between the high-pressure gas tank and the inlet pipe, the connection and sealing are carried out independently, which can effectively avoid the sealing ring from fatigue and wear too quickly, thereby better ensuring the sealing effect and extending the service life of the sealing ring. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a three-dimensional structural diagram of a pressure reducing valve for an air gun provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the first-view axial cross-sectional structure of the air inlet pipe of a pressure reducing valve for an air gun provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the second-view axial cross-sectional structure of the air inlet pipe of a pressure reducing valve for an air gun provided in an embodiment of the present invention; Figure 4 This is a schematic cross-sectional view of the air inlet pipe path of a pressure reducing valve for an air gun provided in an embodiment of the present invention; Figure 5 for Figure 4 Enlarged structural diagram at point A in the diagram; Figure 6 This is a schematic diagram of the exploded structure of the air inlet pipe of a pressure reducing valve for an air gun provided in an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Pressure reducing valve; 10. Housing; 11. Inlet pipe; 12. Outlet pipe; 13. Adjusting component; 14. Pressure gauge; 15. Inlet nozzle; 16. First threaded section; 17. Second threaded section; 18. Drive ring; 19. Compression ring; 20. Sealing ring; 21. Internal threaded section; 22. Annular groove; 23. Transmission block; 24. External threaded section; 25. Sealing groove; 26. Telescopic rod; 27. Limiting groove; 28. Limiting block; 29. ​​First insertion hole; 30. Second insertion hole; 31. Insertion block; 2. High-pressure gas tank. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of the present invention, the following will be described in conjunction with the appendix. Figure 1 To be continued Figure 6 The present invention will now be described in further detail.

[0019] In this embodiment of the invention, a pressure reducing valve 1 for an air gun is provided, including a body of the pressure reducing valve 1. The body includes an air inlet pipe 11 for connecting a high-pressure air tank 2. The air inlet pipe 11 has a first threaded section 16 and a second threaded section 17 arranged sequentially along the axial direction. A drive ring 18 is screwed onto the first threaded section 16. A compression ring 19 is slidably provided on the outer wall of the air inlet pipe 11 along the axial direction. The compression ring 19 is rotatably connected to the drive ring 18. A sealing ring 20 is installed on the compression ring 19. The inner wall of the opening of the high-pressure air tank 2 has an internal threaded section 21. When the internal threaded section 21 is screwed onto the second threaded section 17, the high-pressure air tank 2 is installed on the air inlet pipe 11. After the high-pressure air tank 2 is fully connected to the air inlet pipe 11, based on the power of the drive ring 18, the compression ring 19 pushes the sealing ring 20 to move to the position where the air inlet pipe 11 and the high-pressure air tank 2 need to be sealed for sealing.

[0020] Specifically, the pressure reducing valve 1 includes a housing 10, an inlet pipe 11 for connecting to the high-pressure gas tank 2, an outlet pipe 12 for connecting to the air gun, an adjusting component 13 for adjusting the air pressure, and a pressure gauge 14 for displaying the air pressure. In use, an empty high-pressure gas tank 2 is first connected to the inlet pipe 11. Then, high-pressure gas is injected into the high-pressure gas tank 2 through the inlet nozzle 15 arranged on the housing 10. The adjusting component 13 adjusts the air pressure input to the air gun. In the prior art, when the air gun uses the high-pressure gas tank 2 as the source of the firing gas, the high-pressure gas tank 2... The volume of the pressure reducing valve should not be set too large to avoid affecting the operation of the air gun. Therefore, the gas in the high-pressure gas tank 2 has a short service life and needs to be replaced frequently. As a result, the high-pressure gas tank 2 and the pressure reducing valve 1 will be frequently disassembled. Since the high-pressure gas tank 2 and the pressure reducing valve 1 are fixed by screws, the sealing ring 20 between them will be frequently subjected to circumferential friction during disassembly and assembly, causing the sealing ring 20 to wear too quickly. Moreover, the sealing ring 20 will also undergo torsional deformation after being subjected to circumferential friction, which will accelerate the fatigue of the sealing ring 20 and affect its sealing effect and service life.

[0021] Based on the aforementioned technical issues, in this embodiment, the connection and sealing of the high-pressure gas tank 2 and the pressure reducing valve 1 are operated independently. That is, during the screwing process of the high-pressure gas tank 2 and the pressure reducing valve 1, the sealing ring 20 remains stationary, thus avoiding circumferential friction. After the high-pressure gas tank 2 and the pressure reducing valve 1 are screwed together, the sealing ring 20 is independently driven to move to the position requiring sealing between the high-pressure gas tank 2 and the pressure reducing valve 1, and undergoes radial elastic deformation under axial compression to achieve sealing. Specifically, a first threaded section 16 and a second threaded section 17 are sequentially arranged axially on the outer wall of the inlet pipe 11 of the pressure reducing valve 1, and a corresponding internal threaded section 21 is arranged on the inner wall of the high-pressure gas tank 2's opening. During the first step of installing the high-pressure gas tank 2, this is achieved by screwing the internal threaded section 21 and the second threaded section 17 together. There is space between the inner wall of the high-pressure gas tank 2's opening and the outer wall of the inlet pipe 11 for the sealing ring 20 to move axially. Specifically, a drive ring 18 is screwed onto the first threaded section 16, and a compression ring 1 is slidably arranged axially on the inlet pipe 11. 9. The compression ring 19 is a split structure, with the two parts fixedly connected by bolts. The compression ring 19 is rotatably connected to the drive ring 18, that is, the drive ring 18 is screwed to the first threaded section 16. During the rotation of the drive ring 18, the compression ring 19 can be driven to move axially along the air intake pipe 11, so that the sealing ring 20 is arranged on the end of the compression ring 19 away from the housing 10. By rotating the drive ring 18, the compression ring 19 is driven to move in a direction away from the housing 10, pushing the sealing ring 20 from the space for axial movement of the sealing ring 20 to the position where the high-pressure gas tank 2 and the air intake pipe 11 need to be sealed. During the movement of the sealing ring 20 in the space, it does not come into contact with the side wall of the space, so wear can be avoided. After the sealing ring 20 reaches this position, the drive ring 18 continues to rotate, so that the compression ring 19 compresses the sealing ring 20 axially, causing it to undergo radial elastic deformation (simultaneous deformation inward and outward along the radial direction), thereby sealing the position where the high-pressure gas tank 2 and the air intake pipe 11 need to be sealed.

[0022] In this embodiment, the connection between the air inlet pipe 11 of the pressure reducing valve 1 and the high-pressure gas tank 2 is completed by first screwing the internal thread section 21 and the second thread section 17 together. Then, by rotating the drive ring 18, the compression ring 19 drives the sealing ring 20 to move to the position where the air inlet pipe 11 and the high-pressure gas tank 2 need to be sealed. For the connection between the high-pressure gas tank 2 and the air inlet pipe 11, the connection and sealing are carried out independently, which can effectively avoid the sealing ring 20 from fatigue and wear too quickly, thereby better ensuring the sealing effect and extending the service life of the sealing ring 20.

[0023] Preferably, an annular groove 22 is formed on the inner wall of the drive ring 18, and two transmission blocks 23 are slidably arranged in the annular groove 22. Both transmission blocks 23 are connected to the extrusion ring 19. During the axial movement of the drive ring 18 along the intake pipe 11, the extrusion ring 19 moves axially along with the drive ring 18 based on the cooperation between the transmission blocks 23 and the annular groove 22. The outer wall of the drive ring 18 is provided with several anti-slip textures along the circumference.

[0024] Specifically, the annular groove 22 is located on the inner wall of the drive ring 18 at one end close to the housing 10. The two transmission blocks 23, which are slidably arranged in the annular groove 22, are symmetrically arranged in a certain radial direction. The compression ring 19 includes an annular part for mounting the sealing ring 20 and a vertical part that is slidably arranged on the outer wall of the intake pipe 11 along the axial direction. The end of the vertical part away from the annular part is connected to the transmission block 23. When a steering driving force is applied between the drive ring 18 and the outer wall of the intake pipe 11 through a threaded engagement, it can move axially, thereby driving the compression ring 19 to move together and pushing the sealing ring 20 to the position where the intake pipe 11 and the high-pressure gas tank 2 need to be sealed for sealing. The outer wall of the drive ring 18 is provided with several anti-slip textures, which can play an anti-slip role when the drive ring 18 is rotated.

[0025] Furthermore, an external thread section 24 is arranged on the outer wall of the high-pressure gas tank 2, and the external thread section 24 has the opposite spiral direction to the internal thread section 21; during the sealing operation stroke when the compression ring 19 pushes the sealing ring 20 to the position where the air inlet pipe 11 and the high-pressure gas tank 2 need to be sealed, the drive ring 18 is screwed to the external thread section 24.

[0026] Specifically, the high-pressure gas tank 2 and the inlet pipe 11 are locked by the screw connection of the internal thread section 21 and the second thread section 17. However, during use, the high-pressure gas in the high-pressure gas tank 2 may experience vibration and impact, causing the threaded connection to loosen and reducing the sealing effect. Therefore, in this embodiment, two sets of reverse threads are used to form a mechanical interlock to restrict the high-pressure gas tank 2. That is, an external thread section 24 is arranged on the outer wall of the tank opening of the high-pressure gas tank 2. In order to avoid affecting the strength of the tank opening, the positions of the internal thread section 21 and the external thread section 24 are aligned with the axis of the high-pressure gas tank 2. The threads are staggered upwards, with the external thread section and the internal thread section 21 having opposite helical directions. Similarly, the first thread section 16 and the internal thread section 21 also have opposite helical directions. In this way, the drive ring 18 can be screwed not only to the first thread section 16 but also to the external thread section 24. When the drive ring 18 is rotated, it drives the compression ring 19 to push the sealing ring 20 to the position where the air inlet pipe 11 and the high-pressure gas tank 2 need to be sealed for sealing operations. During this process, the drive ring 18 can gradually be screwed to the external thread section 24, thus achieving mechanical interlocking between the two sets of opposite threads.

[0027] In one optional embodiment, the first threaded segment 16 is axially slidably arranged on the outer wall of the intake pipe 11, and a first elastic element is provided between the first threaded segment 16 and the intake pipe 11 in the sliding direction. That is, during long-term use, both the external thread end and the first threaded segment 16 are worn, causing the drive ring 18 to be unable to be screwed with the external threaded segment 24 or to be screwed with difficulty. Therefore, the first threaded segment 16 is arranged on the outer wall of the intake pipe 11 in a way that can slide axially, and the elastic force of the first elastic element is used for elastic limiting. In this way, the elastic force of the first elastic element is used to realize the position compensation between the drive ring 18 and the external threaded segment 24, so as to ensure that the two can be screwed smoothly.

[0028] Preferably, sealing grooves 25 are arranged at the locations where sealing is required between the air intake pipe 11 and the high-pressure gas tank 2. When the sealing ring 20 is compressed by the compression ring 19 and undergoes elastic deformation, the sealing ring 20 is embedded in the sealing groove 25.

[0029] Specifically, to ensure the controllable radial elastic deformation of the sealing ring 20 under axial compression and thus guarantee the sealing effect, in this embodiment, sealing grooves 25 are arranged at the locations requiring sealing between the air inlet pipe 11 and the high-pressure gas tank 2. The opening of the sealing groove 25 on the air inlet pipe 11 faces the inner wall of the tank opening, and the opening of the sealing groove 25 on the high-pressure gas tank 2 faces the outer wall of the air inlet pipe 11. When the sealing ring 20 reaches these locations, it undergoes radial elastic deformation under axial compression, forming a structure with rounded ends and a rectangular middle section. A seal is formed between the intake pipe 11 and the high-pressure gas tank 2. In an optional embodiment, the sealing ring 20 has a gourd-shaped structure with a smaller top and a larger bottom. Its small end is engaged with the compression ring 19. Based on the compression action of the compression ring 19, the large end undergoes elastic deformation to seal between the intake pipe 11 and the high-pressure gas tank 2. That is, the small end of the sealing ring 20 is engaged with the compression ring 19. Taking advantage of its elastic deformation characteristic, it is easy to disassemble and install when it needs to be replaced. When the large end is compressed and undergoes elastic deformation, it is difficult to detach or shift from the compression ring 19.

[0030] Furthermore, the drive ring 18 comprises two arc-shaped parts connected by a telescopic rod 26 with elastic telescopic function, and the two parts are restricted from separation by a limiting member; the limiting member includes a limiting groove 27 formed on each part of the drive ring 18, and a limiting block 28 is slidably provided on one part in the radial direction. In the sliding direction, a second elastic member is provided between the limiting block 28 and the drive ring 18. When the two parts of the drive ring 18 need to be merged, the limiting block 28 and the limiting groove 27 on both parts of the drive ring 18 are inserted into each other; when the two parts of the drive ring 18 need to be separated, the limiting block 28 is pressed out of the limiting groove 27, and the two parts of the drive ring 18 move away from each other based on the rebound force of the telescopic rod 26.

[0031] Specifically, the transmission block 23 can slide not only circumferentially within the annular groove 22, but also in other directions. The size of the transmission block 23 is set relatively large. When the two parts of the drive ring 18 are not separated, one part of the transmission block 23 is connected to the compression ring 19, and the other part is basically within the annular groove 22. When the two parts of the drive ring 18 are separated, part of the transmission block 23 remains within the annular groove 22 and will not detach, thus preventing it from falling off the intake pipe 11 when the two parts of the drive ring 18 are separated. Only when the two parts of the drive ring 18 are completely separated can the transmission block 23 be completely separated from the annular groove 22. The telescopic rod 26 ensures that the two parts of the drive ring 18 are in opposite directions when separated. When the drive ring 18 needs to drive the compression ring 19 to push the sealing ring 20 to seal the intake pipe 11 and the high-pressure gas tank 2 at the required sealing positions, and when two sets of reverse threads are needed to interlock and prevent the high-pressure gas tank 2 from loosening its connection with the intake pipe 11, the two parts of the drive ring 18 need to be combined and restricted from separation. Therefore, when the drive ring 18... A limiting block 28 is slidably disposed on one part of the drive ring 18 along a certain radial direction, and a second elastic element is disposed between the two. Correspondingly, limiting grooves 27 are opened on both parts of the drive ring 18. Utilizing the elastic force of the second elastic element, the limiting block 28 can be inserted into each limiting groove 27 to restrict the merging of the two parts of the drive ring 18. When it is necessary to replace the high-pressure gas tank 2, the limiting block 28 is pressed to disengage it from the corresponding inserted limiting groove 27, and then the two parts of the drive ring 18 extend... The retractor 26 separates under its own rebound force, so the high-pressure gas tank 2 can be removed simply by rotating in the opposite direction to disengage from the air inlet pipe 11. After the high-pressure gas tank 2 is removed, the two parts of the drive ring 18 are reassembled. During the reassembly process, the drive ring 18 and the limiting block 28 can achieve a squeezing effect through a wedge fit, so that the limiting block 28 first moves away from the limiting groove 27, and then rebounds into the limiting groove 27 using the elastic force of the second elastic element, thus restricting the two parts of the drive ring 18 after they are reassembled.

[0032] In one of the optional embodiments, in order to avoid accidental contact with the limiting block 28 and causing the two parts of the drive ring 18 to separate, the limiting member is arranged in two places on the drive ring 18, and the two places are located at the two ends of the same radial direction. When it is necessary to separate the two parts of the drive ring 18, the two limiting blocks 28 need to be pressed at the same time to move relative to each other, and both disengage from their respective limiting grooves 27, thereby effectively avoiding accidental contact that could cause the two parts of the drive ring 18 to separate.

[0033] Furthermore, the transmission block 23 is arranged radially on the extrusion ring 19, and a third elastic element is provided between them. The stiffness coefficient of the third elastic element is less than that of the second elastic element. A first insertion hole 29 is provided on the outer wall of the air intake pipe 11, which is inserted into each extrusion ring 19. When the sealing ring 20 seals the air intake pipe 11 and the high-pressure gas tank 2, the two transmission blocks 23 correspond to the two first insertion holes 29 respectively. A second insertion hole 30 is also provided on each transmission block 23. Based on the elastic force of the second elastic element, the limiting block 28 is first inserted into the second insertion hole 30 on the corresponding position transmission block 23, and pushes the transmission block 23 into the corresponding first insertion hole 29 a certain distance. The limiting block 28 and the corresponding limiting groove 27 are not completely disengaged, and the separation of the two parts of the drive ring 18 is still restricted, so as to restrict the rotation of the drive ring 18 and prevent the drive ring 18 from loosening during use, which would cause a decrease in sealing performance.

[0034] Specifically, in the aforementioned embodiments, after restricting the screw connection between the high-pressure gas tank 2 and the air intake pipe 11, the drive ring 18 may also loosen due to accidental contact or vibration. The loosening of the drive ring 18 directly affects the sealing effect of the sealing ring 20. Therefore, it is necessary to restrict the screw connection between the drive ring 18 and the external thread section 24, that is, to slide the transmission block 23 radially on the compression ring 19 and use the elastic force of the third elastic element to restrict its separation from the compression ring 19. A first insertion hole 29 is opened on the outer wall of the air intake pipe 11. When the transmission block 23 is subjected to external force to overcome the elastic force of the third elastic element, it can be inserted into the first insertion hole 29. A second insertion hole is opened on the transmission block 23. For hole 30, correspondingly, insert block 31 is arranged on limit block 28. When the position of transmission block 23 is driven to align with the first insertion hole 29, the elastic force of the second elastic element pushes limit block 28 close to transmission block 23, so that insert block 31 is inserted into second insertion hole 30. Then, continue to push transmission block 23 into first insertion hole 29 a certain distance. At this time, limit block 28 will not disengage from limit groove 27, that is, the separation of the two parts of drive ring 18 is still restricted. However, through the cooperation of insert block 31 and second insertion hole 30 and transmission block 23 and first insertion hole 29, drive ring 18 cannot be rotated. This can avoid the problem of drive ring 18 becoming loose during use.

[0035] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Claims

1. A pressure reducing valve for an air gun, comprising a body of the pressure reducing valve, said body including an inlet pipe for connecting to a high-pressure air tank, characterized in that, The intake pipe is provided with a first threaded section and a second threaded section in sequence along the axial direction. A drive ring is screwed onto the first threaded section, and a compression ring is slidably provided on the outer wall of the air intake pipe along the axial direction. The compression ring is rotatably connected to the drive ring, and a sealing ring is installed on the compression ring. The inner wall of the high-pressure gas tank opening is provided with an internal threaded section. When the internal threaded section is screwed onto the second threaded section, the high-pressure gas tank is installed on the air intake pipe. After the high-pressure gas tank and the air inlet pipeline are fully connected, the compression ring, driven by the power of the drive ring, pushes the sealing ring to move to the position where the air inlet pipeline and the high-pressure gas tank need to be sealed to perform the sealing operation.

2. The pressure reducing valve for an air gun according to claim 1, characterized in that, An annular groove is formed on the inner wall of the drive ring, and two transmission blocks are slidably arranged in the annular groove. Both transmission blocks are connected to the extrusion ring. During the axial movement of the drive ring along the intake pipe, the extrusion ring moves axially along with the drive ring based on the cooperation between the transmission blocks and the annular groove.

3. The pressure reducing valve for an air gun according to claim 2, characterized in that, The outer wall of the drive ring has several anti-slip patterns arranged circumferentially.

4. The pressure reducing valve for an air gun according to claim 2, characterized in that, The outer wall of the high-pressure gas tank opening is provided with an external thread section, the external thread section having the opposite helical direction to the internal thread section; during the sealing operation stroke where the extrusion ring pushes the sealing ring to the position where the air inlet pipe and the high-pressure gas tank need to be sealed, the drive ring is screwed to the external thread section.

5. The pressure reducing valve for an air gun according to claim 4, characterized in that, The internal thread section is positioned opposite to the external thread section along the axial direction of the high-pressure gas tank.

6. The pressure reducing valve for an air gun according to claim 4, characterized in that, The air intake pipe and the high-pressure gas tank are provided with sealing grooves at the locations that need to be sealed. When the sealing ring is squeezed by the compression ring and undergoes elastic deformation, the sealing ring is embedded in the sealing groove.

7. The pressure reducing valve for an air gun according to claim 6, characterized in that, The sealing ring has a gourd-shaped structure that is smaller at the top and larger at the bottom. Its small end is snapped onto the compression ring. Based on the compression action of the compression ring, the large end undergoes elastic deformation to seal the air intake pipe and the high-pressure gas tank.

8. The pressure reducing valve for an air gun according to claim 4, characterized in that, The first threaded section is axially slidably arranged on the outer wall of the intake pipe, and a first elastic element is provided between the first threaded section and the intake pipe in the sliding direction.

9. The pressure reducing valve for an air gun according to claim 4, characterized in that, The drive ring comprises two arc-shaped parts, which are connected by a telescopic rod with elastic telescopic function, and the two parts are restricted from separation by a limiting member.

10. The pressure reducing valve for an air gun according to claim 9, characterized in that, The limiting component includes a limiting groove formed on each part of the drive ring, and a limiting block is slidably provided on one part of it in the radial direction. In the sliding direction, a second elastic element is provided between the limiting block and the drive ring. When the two parts of the drive ring need to be merged, the limiting block is inserted into the limiting groove on both parts of the drive ring. When the two parts of the drive ring need to be separated, the limiting block is disengaged from the limiting groove by pressing it, and the two parts of the drive ring move away from each other based on the rebound force of the telescopic rod.

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