Outlet valve structure of gas storage gun

Abstract

The present invention discloses an outlet valve structure of an air storage gun, comprising a valve body with a cavity inside, an air inlet channel and an air outlet channel connected to the cavity, a valve core, and an elastic reset mechanism. The valve core is slidably connected to the valve body and includes a sealing portion that separates the air outlet channel from the cavity by contacting the inner wall of the cavity. High-pressure gas enters the cavity through the air inlet channel, comprising a fixed seat provided with a sliding cavity, the valve core is sealed and slidably connected to the sliding cavity, the valve core and the sliding cavity cooperate to form a first sealing area, when the valve core is in an initial position, its sealing portion contacts the inner wall of the cavity to form a second sealing area, high-pressure gas enters the cavity through the air inlet channel, and a high-pressure area is formed in the first sealing area and the second sealing area, and the other side of the first sealing area and the other side of the second sealing area are both normal pressure areas connected to the outside. The present invention provides an outlet valve structure of an air storage gun that can adjust the valve opening force and is easy to operate.

Description

[0001] The present invention relates to an air outlet valve structure of a gas storage gun, belonging to the technical field of gas storage guns. Background Art

[0002] The gas storage gun fires by providing power to the bullets in the gas storage gun through high-pressure gas, and the release of the high-pressure gas is achieved by opening the air valve. The existing air outlet valve structure of the gas storage gun is as Figure 1 shown, including a valve body A containing a cavity B. The cavity B is respectively connected with an air inlet channel C and an air outlet channel D. A valve core assembly F that seals and cooperates with the high-pressure air outlet channel C and an elastic reset mechanism E that pushes the valve core assembly F to a position where the air outlet channel C is sealed are slidably connected in the cavity B. Its working principle is to inject high-pressure gas into the cavity B through the air inlet channel C. The valve core assembly F is in a position where the air outlet channel C is sealed under the action of the elastic reset mechanism E, so that a sealing area is formed between the valve core assembly F and the air outlet channel C. And the high-pressure gas pressure in the cavity B is usually as high as 25 MPA to 30 MPA. This pressure generates a pressure acting on the valve core assembly F on the sealing area. When shooting, it is necessary to push the valve core assembly F through an external force for a certain stroke of sliding to connect the air outlet channel C with the cavity B, so that the high-pressure gas in the cavity B can enter the air outlet channel C to achieve the firing of the bullet. And this external force needs to overcome the thrust of the elastic reset mechanism E on the valve core assembly F and the pressure generated by the high-pressure gas pressure at the same time. The existing structure can only reduce the pressure by reducing the opening of the air outlet channel C at the sealing and cooperating end of the valve core assembly F to reduce the sealing area. However, this will cause insufficient air flow into the air outlet channel C and affect shooting. Therefore, a relatively large external force needs to be applied when opening the valve in the existing air outlet valve structure, reducing the operation convenience. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an air outlet valve structure of a gas storage gun that can adjust the valve opening force and is convenient to operate, which can solve the deficiencies of the existing technology.

[0004] The technical solution of the present invention is: an outlet valve structure of an air storage gun, comprising a valve body with a cavity inside, an air inlet channel and an air outlet channel connected to the cavity, a valve core, and an elastic reset mechanism. The valve core is slidably connected to the valve body and includes a sealing portion that separates the air outlet channel from the cavity by contacting the inner wall of the cavity. High-pressure gas enters the cavity through the air inlet channel. In the absence of external force, the elastic reset mechanism pushes the valve core to an initial position where its sealing portion contacts the inner wall of the cavity to separate the air outlet channel from the cavity. The valve core is displaced by external force to connect the cavity with the air outlet channel. To achieve partial high-pressure gas entering the air outlet channel, after removing the external force, the elastic reset mechanism pushes the valve core to reset to the initial position, including a fixed seat provided with a sliding cavity, the valve core and the sliding cavity are sealingly and slidingly connected, the valve core and the sliding cavity cooperate to form a first sealing area, when the valve core is in the initial position, its sealing part contacts with the inner wall of the cavity to form a second sealing area, high-pressure gas enters the cavity through the air inlet channel, and a high-pressure area is formed in the first sealing area and the second sealing area, and the other side of the first sealing area and the other side of the second sealing area are both normal pressure areas connected to the outside world.

[0005] Furthermore, the fixed seat is fixedly installed in the cavity or the air inlet channel, one end of the sliding cavity in the fixed seat is a sealing end, one end of the valve core is located in the sliding cavity, and the other end can pass through the valve body, and a valve core passage is penetrated on the valve core to connect the sliding cavity with the external atmosphere.

[0006] The elastic reset mechanism further comprises a compression spring installed in the sliding cavity, and the compression spring is located between the bottom of the sliding cavity and the valve core.

[0007] Furthermore, the fixing seat is interference-fittedly installed in the cavity or the air inlet passage, and a plurality of penetrating gas passages are provided on the fixing seat.

[0008] Furthermore, the sliding cavity passes through the fixed seat, and the valve core passes through the sliding cavity with one end located outside the valve body and the other end located in the cavity.

[0009] Furthermore, the valve core is detachably mounted with an external force application portion at the outer end of the valve body.

[0010] Furthermore, the area of ​​the second sealing region is equal to or slightly larger than the area of ​​the first sealing region.

[0011] By implementing the present invention, a valve seat is provided in the valve body. A sliding cavity for sealing and sliding connection with the valve core is provided on the valve seat, so that the valve core and the sliding cavity cooperate to form a first sealing area. Without external force, the elastic reset mechanism pushes the valve core to an initial position where its sealing part contacts the inner wall of the cavity, cutting off the air outlet channel from the cavity. When the valve core is in the initial position, its sealing part contacts the inner wall of the cavity to form a second sealing area. High-pressure gas enters the cavity through the air inlet channel, forming a high-pressure area between the first sealing area and the second sealing area. The other side of the first sealing area and the other side of the second sealing area are both normal-pressure areas communicating with the outside. At this time, the pressure on the valve core is the pressure in the high-pressure area multiplied by the difference between the area of the second sealing area and the area of the first sealing area. Without reducing the opening of the air outlet channel, the areas of the first sealing area and the second sealing area can be artificially controlled to achieve the purpose of controlling the pressure magnitude. When the area of the second sealing area is equal to the area of the first sealing area, the high pressure formed by the high-pressure gas does not exert pressure on the valve core. Only by applying an external force that overcomes the acting force of the elastic reset mechanism can the valve opening action be realized, and the operation is convenient and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of the structure of the existing air outlet valve;

[0013] Figure 2 is a schematic diagram of the state when the valve is closed in Embodiment 1;

[0014] Figure 3 is a schematic diagram of the state when the valve is opened in Embodiment 1;

[0015] Figure 4 is a schematic diagram of the state when the valve is closed in Embodiment 2;

[0016] Figure 5 is a schematic diagram of the state when the valve is opened in Embodiment 2.

[0017] As shown in the figure: cavity 1; valve body 2; air inlet channel 3; air outlet channel 4; fixed seat 5; sliding cavity 6; sealing rings 7, 7A; sealing part 8; gas passage 9; valve core 10; compression spring 11; valve core passage 12; external force acting part 13. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Embodiment 1 of the present invention: As Figures 2 to 3As shown in the figure, an air outlet valve structure of a gas storage gun includes a valve body 2 with a cavity 1 inside, an air inlet channel 3 connected to the left side of the cavity 1, and an air outlet channel 4 connected to the right side of the cavity 1. A fixed seat 5 is arranged in the cavity 1. The fixed seat 5 includes a sliding cavity 6 horizontally arranged with a sealed right end. The valve core 10 is hermetically slidably connected to the sliding cavity 6 by sleeving a sealing ring 7, forming a first sealing area therewith. A sealing portion 8 is provided in the middle of the valve core 10. The sealing portion 8 can contact the inner wall of the cavity 1 to form a second sealing area that cuts off the air outlet channel 3 from the cavity 1. A valve core passage 12 is provided through the valve core 10 to communicate the sliding cavity 6 with the outside, making one side of the first sealing area an atmospheric pressure area. A compression spring 11 is arranged at the bottom of the sliding cavity 6 and the left end of the valve core 10. As Figure 2 shown, without external force, the elastic force generated by the deformation of the compression spring 11 pushes the valve core 10 to an initial position where the sealing portion 8 contacts the inner wall of the cavity 1 to cut off the air outlet channel 3 from the cavity 1. At the initial position, the right end of the valve core 10 is located outside the valve body 2. High-pressure gas is injected into the cavity 1 through the air inlet channel 3, forming a high-pressure area in the first sealing area and the second sealing area. Since the other side of the second sealing area is the air outlet channel 4 connected to the barrel, the other side is also an atmospheric pressure area.

[0019] During operation, as Figure 3 shown, by hitting the right end of the valve core 10 to push it to shift to the left. During this process, the compression spring 11 is compressed, and the sealing portion 8 of the valve core 10 is separated from the inner wall of the cavity 1. The cavity 1 is communicated with the air outlet channel 3, and part of the high-pressure gas enters the air outlet channel 3 to realize the firing of the bullet. Subsequently, the compression spring 11 releases and pushes the valve core 10 to reset to the initial position to prepare for the next round of firing. In the prior art, as Figure 1 shown, it is equivalent to having only the second sealing area. Since a certain air flow rate is required for bullet firing, the opening of the air outlet channel D cannot be too small. Therefore, the second sealing area that seals the air outlet channel D needs to have a certain area. After the high-pressure gas enters the cavity B, due to the pressure difference, a large pressure will be generated on the area of the second sealing area acting on the valve core F. When the valve core F shifts, a pressure to overcome the pressure generated by the pressure difference and the elastic force of the compression spring E needs to be applied. In the present invention, by adding the first sealing area, the acting area of the high-pressure gas is the difference between the two areas. Under the same high pressure and with the area of the second sealing area unchanged, the pressure can be adjusted by artificially controlling the area of the first sealing area. The smaller the difference between the two, the smaller the pressure. When the two areas are equal, it is a non-pressure state. When the area of the first sealing area is larger than that of the second sealing area, there will be a pressure to overcome the elastic force of the compression spring 11 to push the valve core 10 to shift and open. To achieve labor-saving valve opening while ensuring safety, it is optimal that the area of the second sealing area is equal to or slightly larger than the area of the first sealing area. To facilitate the installation of the fixed seat 5 in the valve body 2 without affecting the communication between the air inlet channel 3 and the cavity 1, the fixed seat 5 is installed in the cavity 1 by interference fit, and a number of through gas passages 9 are provided on the fixed seat 5.

[0020] Example 2: As Figures 4 to 5 shown, the fixed seat 5 is fixedly installed in the valve body 2, and the connection is sealed by setting the sealing ring 7A. The sliding cavity 6 vertically penetrates the fixed seat 5 to connect the cavity 1 with the outside. The valve core 10 passes through the lower end of the sliding cavity 6 and is located outside the valve body 2, and the upper end is located in the cavity 1. A sealing ring 7 is sleeved outside the valve core 10 to make the valve core 10 in sealed sliding connection with the sliding cavity 6, and a first sealing area is formed therewith. The air outlet channel 4 communicates with the top of the cavity 1. A sealing portion 8 is provided at the upper end of the valve core 10. The sealing portion 8 can contact the top of the cavity 1 to form a second sealing area that cuts off the air outlet channel 3 from the cavity 1. A compression spring 11 is sleeved on the valve core 10, and the compression spring 10 is limited and compressed between the fixed seat 5 and the upper end of the valve core 10. As Figure 4 shown, without external force, the elastic force generated by the deformation of the compression spring 11 pushes the valve core 10 upward to the initial position where the sealing portion 8 contacts the top of the cavity 1 to cut off the air outlet channel 3 from the cavity 1. To facilitate the impact on the valve core 10 to complete the downward opening of the valve, an external force acting portion 13 with a diameter larger than the valve core 10 is detachably installed at the lower end of the valve core 10.

[0021] During operation, as Figure 5 shown, the external force acting portion 13 at the lower end of the valve core 10 is pulled downward by hitting the hammer. During this process, the compression spring 11 is compressed, and the sealing portion 8 of the valve core 10 is separated from the inner wall of the cavity 1. The cavity 1 is communicated with the air outlet channel 3, and part of the high-pressure gas enters the air outlet channel 3 to realize the firing of the bullet. Subsequently, the compression spring 11 is released to push the valve core 10 upward to reset and prepare for the next round of firing. Compared with Example 1, the principle of saving effort in opening the valve is the same for both. The difference is that Example 1 opens the valve through a pushing action, while this example realizes the opening of the valve through a pulling action.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "surface", "side", "inner", "periphery", etc. indicating the orientation or position relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

Claims

1. An outlet valve structure of an air storage gun, comprising a valve body with a cavity therein, an air inlet channel and an air outlet channel connected with the cavity, a valve core, and an elastic reset mechanism. The valve core is slidably connected to the valve body and comprises a sealing portion which isolates the air outlet channel from the cavity by contacting with the inner wall of the cavity. High-pressure gas enters the cavity through the air inlet channel. In the absence of external force, the elastic reset mechanism pushes the valve core to an initial position where its sealing portion contacts with the inner wall of the cavity to isolate the air outlet channel from the cavity. The valve core is displaced by external force to connect the cavity with the air outlet channel, so that part of the high-pressure gas enters the air outlet channel. After the external force is removed, the elastic reset mechanism pushes the valve core to reset to the initial position. Features: It includes a fixed seat provided with a sliding cavity, the valve core is sealingly and slidingly connected with the sliding cavity, the valve core and the sliding cavity cooperate to form a first sealing area, when the valve core is in an initial position, its sealing part contacts with the inner wall of the cavity to form a second sealing area, high-pressure gas enters the cavity through an air inlet channel to form a high-pressure area in the first sealing area and the second sealing area, and the other side of the first sealing area and the other side of the second sealing area are both normal pressure areas connected to the outside world.

2. The gas outlet valve structure of the gas storage gun according to claim 1, Features: The fixing seat is fixedly installed in the cavity or the air inlet channel, one end of the sliding cavity in the fixing seat is a sealing end, one end of the valve core is located in the sliding cavity, and the other end can pass through the valve body, and a valve core passage is penetrated on the valve core to connect the sliding cavity with the external atmosphere.

3. The gas outlet valve structure of the gas storage gun according to claim 2, Features: The elastic reset mechanism comprises a compression spring installed in the sliding cavity, and the compression spring is located between the bottom of the sliding cavity and the valve core.

4. The gas outlet valve structure of the gas storage gun according to claim 2, Features: The fixing seat is interference-fitted in the cavity or the air inlet passage, and a plurality of penetrating gas passages are provided on the fixing seat.

5. The gas outlet valve structure of the gas storage gun according to claim 1, Features: The sliding cavity passes through the fixing seat, and one end of the valve core passes through the sliding cavity and is located outside the valve body, while the other end is located in the cavity.

6. The gas outlet valve structure of the gas storage gun according to claim 5, Features: The valve core is detachably mounted with an external force acting part at the outer end of the valve body.

7. The gas outlet valve structure of the gas storage gun according to claim 1, Features: The area of ​​the second sealing region is equal to or slightly larger than the area of ​​the first sealing region.

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