A safe self-locking structure for a high-pressure hydrogenation gun

Abstract

The present invention discloses a safety self-locking structure of a high-pressure hydrogenation gun, wherein at least one radial mounting hole is arranged circumferentially on the gun core housing of the high-pressure hydrogenation gun, all radial mounting holes are connected with the gas filling channel in the hydrogenation gun through an air intake passage, a self-locking sealing assembly is arranged in each radial mounting hole, each self-locking sealing assembly can move along the corresponding radial mounting hole to contact the inner wall of the gun head housing, and can contact and seal with the corresponding radial mounting hole, each self-locking sealing assembly comprises: a sealing pin arranged in the corresponding radial mounting hole, a circle of annular positioning grooves are arranged on the outer wall of the sealing pin, an O-ring and an open gasket are sequentially nested in the annular positioning groove along the axial direction of the sealing pin, and the O-ring is located on one side close to the axis of the gun core housing. The present invention has the advantage of being able to improve the use safety of the hydrogenation gun in a working state.

Description

Technical Field

[0001] The invention relates to the technical field of high-pressure hydrogenation guns, and in particular to a safety self-locking structure for a high-pressure hydrogenation gun. Background Art

[0002] With the increasing consumption of fossil energy such as oil, natural gas, and coal, their reserves are gradually decreasing and will eventually be exhausted. The development of clean energy to replace fossil energy has become one of the research and development topics of countries around the world. The research and development of clean and pollution-free fuel cells is imperative. A fuel cell is a chemical device that directly converts the chemical energy of a fuel into electrical energy, using fuel and oxygen as raw materials. If hydrogen is used as fuel, its combustion product is only water, which is pollution-free to the environment and can be recycled, making it an ideal secondary energy source. Hydrogen is abundant in the entire earth's environment. As an efficient, environmentally friendly, clean energy source, its development and utilization has become a trend. Hydrogen is the gas with the smallest known density in the world and is extremely easy to escape. For a long time in the future, hydrogen will still be stored in high-pressure containers. When in use, the high-pressure gas is transferred from the high-pressure container of the hydrogen storage station to the fuel cell hydrogen storage bottle through a hydrogen filling gun. Safety protection work needs to be done in this process. The hydrogenation guns currently in use on the market are connected in series with a breakaway valve and a hydrogenation machine. The breakaway valve is located between the hydrogenation gun and the hydrogenation machine. This connection method can promptly seal the high-pressure gas in the hydrogenation machine and the hose connected to the hydrogenation gun when the breakaway valve is broken.

[0003] The structure of the hydrogenation gun currently used includes: a gun head shell, a gun head sleeve is threadedly connected to the front end of the gun head shell, a gun core shell is arranged in the inner cavity of the gun head shell, a valve seat sleeve and a gun core are arranged in the inner cavity of the gun core shell from front to back, a claw piece is arranged at the front end of the gun core shell, and the rear end of the gun core shell is threadedly connected to the gun body assembly, a valve seat is arranged in the valve seat sleeve, a valve core ejector pin is inserted in the valve seat, a first spring is arranged between the valve core ejector pin and the gun core, and the valve core ejector pin always has the elastic force of the first spring to move forward to the valve seat. The sleeve contacts and cuts off the tendency of the gas filling channel. A pressure ring is arranged between the rear end of the gun head shell and the gun body assembly. The pressure ring is movably sleeved on the outside of the gun body assembly and is fixedly connected to the gun head shell through a retaining spring. A second spring is arranged between the pressure ring and the gun core shell. The second spring makes the pressure ring and the gun head shell always have a tendency to move backward relative to the gun core shell to make the claw piece loosen the hydrogen filling port. A push ring is arranged at the rear end of the pressure ring. The push ring can cooperate with the gun body assembly to push the pressure ring and the gun head shell to overcome the elastic force of the second spring and move forward to make the claw piece clamp the hydrogen filling port.

[0004] When in use, when the tip of the hydrogen filling gun is correctly connected to the hydrogen filling port on the fuel cell vehicle, the handle on the gun body assembly is pushed, and the push ring is subjected to a force along the axis direction of the tip of the hydrogen filling gun through the principle of leverage. Under the push of this force, the push ring, the pressure ring, the gun head housing, and the gun head sleeve will overcome the elastic force of the second spring and move forward relative to the gun core housing. In the process of the gun head sleeve moving forward, the annular step in the inner cavity of the gun head sleeve will act on a section of the inclined surface of the claw piece, so that the claw piece will be closed inward together to grasp the hydrogen filling port, and at the same time, the valve core ejector pin will be pushed in the opposite direction by the hydrogen filling port to overcome the elastic force of the first spring and move backward, so that the valve core ejector pin The needle is separated from the valve seat sleeve and the gas filling channel is opened. At this time, the hydrogenation gun feeds back a signal to the hydrogenation machine that the hydrogenation port is correctly connected, and the hydrogenation machine controls to start to pass high-pressure gas to the hydrogenation port through the gas filling channel of the hydrogenation gun; in the process of the hydrogenation machine filling the hydrogenation port with high-pressure hydrogen through the gas filling channel of the hydrogenation gun, since the second spring is always in a compressed state, its elongation tendency makes the gun head shell and the gun core shell have a tendency to move relative to each other. For example, under the high-pressure state of the filling gas, when the gun head shell moves backward relative to the gun core shell, it will cause the claw to loosen the hydrogenation port, causing the hydrogenation machine to separate from the hydrogenation port, thereby causing a serious safety accident. It can be seen that it is also particularly important to improve the safety design of the hydrogenation gun itself. Summary of the invention

[0005] The purpose of the present invention is to provide a high-pressure hydrogenation gun safety self-locking structure which can improve the safety of the hydrogenation gun.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a safety self-locking structure of a high-pressure hydrogenation gun, wherein at least one radial mounting hole is arranged on the gun core shell of the high-pressure hydrogenation gun along the circumferential direction, and all radial mounting holes are connected with the gas filling channel in the hydrogenation gun through an air intake passage, and a self-locking sealing component is arranged in each radial mounting hole, and each self-locking sealing component can move along the corresponding radial mounting hole to contact the inner wall of the gun head shell, and can contact and seal with the corresponding radial mounting hole, and each self-locking sealing component includes: a sealing pin arranged in the corresponding radial mounting hole, and a circle of annular positioning grooves are arranged on the outer wall of the sealing pin, and a ring of annular positioning grooves are arranged in the annular positioning grooves. An O-ring and an open gasket are nested in sequence along the axial direction of the sealing pin, and the O-ring is located on the side close to the axis of the gun core housing; when the gas filling channel in the hydrogenation gun is opened and high-pressure gas is introduced into the hydrogenation port, the high-pressure gas in the gas filling channel will enter the various radial mounting holes on the gun core housing through the air inlet passage, and the self-locking sealing assembly in each radial mounting hole will move along the corresponding radial mounting hole in the direction away from the axis of the gun core housing under the action of the high-pressure gas until the sealing pin in the self-locking sealing assembly is pressed against the inner wall of the gun head housing, thereby locking and fixing the gun head housing and the gun core housing to prevent the high-pressure hydrogenation gun from being separated from the hydrogenation port.

[0007] Furthermore, the aforementioned high-pressure hydrogenation gun safety self-locking structure, wherein: the specific structure of the air intake passage includes: a first radial through hole arranged on the gun core and connected to the gas filling passage of the hydrogenation gun, an annular gap arranged between the valve seat sleeve and the gun core housing and connected to each radial mounting hole, and a second radial through hole arranged on the valve seat sleeve and connecting the first radial through hole and the annular gap, the first radial through hole, the second radial through hole, and the annular gap together form an air intake passage connecting the gas filling passage with each radial mounting hole.

[0008] Furthermore, in the aforementioned high-pressure hydrogenation gun safety self-locking structure, three radial mounting holes are circumferentially arranged on the gun core housing, and the three radial mounting holes are evenly distributed along the circumference.

[0009] Furthermore, the aforementioned high-pressure hydrogenation gun safety self-locking structure, wherein: at least one threaded hole and at least one light hole are provided at the portion of the gun core shell threadedly connected to the gun body assembly, the threaded holes and the light holes are evenly distributed along the circumference, and a set screw is provided in each threaded hole for locking the gun body assembly and the gun core shell threadedly connected together.

[0010] Through the implementation of the above technical scheme, the beneficial effects of the present invention are as follows: (1) when the high-pressure gas is filled inside the gun body, the added self-locking safety structure can prevent the hydrogenation gun from separating from the hydrogenation port, thereby reducing the probability of accidents and improving the safety of use; (2) the power generated by the pre-expansion of the high-pressure gas is fully utilized, and the original structural characteristics of the hydrogenation gun are fully utilized. On the premise of ensuring the air tightness requirements of the hydrogenation gun, the safety of the hydrogenation gun in the working state is improved; and it will automatically unlock after the high-pressure gas is emptied; (3) the structure is compact, and the added self-locking safety structure does not change the overall size of the hydrogenation gun; (4) during the high-pressure gas filling process, the high-pressure gas passes into the various radial mounting holes on the gun core housing through the first radial through hole on the gun core, the second radial through hole on the valve seat sleeve, and the annular gap between the valve seat sleeve and the gun core housing, and then acts on the self-locking sealing components in the various radial mounting holes. The gas channel path is long and tortuous, which effectively prevents local gas pressure mutations, and further improves the safety of the hydrogenation gun in the working state. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The present invention provides a schematic structural diagram of a safety self-locking structure for a high-pressure hydrogenation gun.

[0012] Figure 2 for Figure 1 An enlarged schematic diagram of the H site shown in FIG.

[0013] Figure 3 for Figure 1 Schematic diagram of the relative position relationship between the gun head housing, gun core housing and self-locking sealing assembly in the left viewing direction.

[0014] Figure 4 It is a structural schematic diagram of the self-locking sealing component.

[0015] Figure 5 It is a schematic diagram of the structure of the gun core housing. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the safety self-locking structure of a high-pressure hydrogenation gun comprises: at least one radial mounting hole 2 is circumferentially arranged on the gun core housing 1 of the high-pressure hydrogenation gun. In the present embodiment, three radial mounting holes 2 are circumferentially arranged on the gun core housing 1, and the three radial mounting holes 2 are evenly distributed along the circumferential direction; all radial mounting holes 2 are connected to the gas filling channel 3 in the hydrogenation gun through an air intake passage. In the present embodiment, the specific structure of the air intake passage comprises: a first radial through hole 10 arranged on the gun core 9 and connected to the gas filling channel 3 of the hydrogenation gun, an annular gap 12 arranged between the valve seat sleeve 11 and the gun core housing 1 and connected to each radial mounting hole 2, and a first radial through hole 10 arranged on the valve seat sleeve 11 and connected to the first radial through hole 10. A radial through hole 10 and a second radial through hole 13 of an annular gap 12, the first radial through hole 10, the second radial through hole 13, and the annular gap 12 together form an air intake passage that connects the gas filling channel 3 with each radial mounting hole 2. Since the air intake passage is long and tortuous, it can effectively prevent sudden changes in local air pressure; a self-locking sealing component is arranged in each radial mounting hole 2, each self-locking sealing component can move along the corresponding radial mounting hole 2 to contact the inner wall of the gun head shell 4, and can contact and seal with the corresponding radial mounting hole 2, each self-locking sealing component includes: a sealing pin 5 arranged in the corresponding radial mounting hole 2, a circle of annular positioning groove 6 is arranged on the outer wall of the sealing pin 5, and a circle of annular positioning groove 6 is arranged along the annular positioning groove 6 The sealing pin 5 is axially nested with an O-ring 7 and an open gasket 8 in sequence, and the O-ring 7 is located on the side close to the axis of the gun core housing 1; when the gas filling channel 3 in the hydrogenation gun is opened and high-pressure gas is introduced into the hydrogenation port, the high-pressure gas in the gas filling channel 3 will enter the various radial mounting holes 2 on the gun core housing 1 through the first radial through hole 10, the second radial through hole 13, and the annular gap 12 in sequence, and the self-locking sealing component in each radial mounting hole 2 will move along the corresponding radial mounting hole 2 in the direction away from the axis of the gun core housing 1 under the action of the high-pressure gas until the sealing pin 5 in the self-locking sealing component is pressed against the inner wall of the gun head housing 4, thereby locking and fixing the gun head housing 4 and the gun core housing 1. , preventing the gun head housing 4 and the gun core housing 1 from moving relative to each other, thereby preventing the high-pressure hydrogenation gun from being separated from the hydrogenation port; in this embodiment, at least one threaded hole 15 and at least one light hole 16 are provided at the part of the gun core housing 1 threadedly connected to the gun body assembly 14, and the threaded holes 15 and the light holes 16 are evenly distributed along the circumferential direction. A set screw 17 for locking the gun body assembly 14 and the gun core housing 1 that are threadedly connected together is provided in each threaded hole 15. The set screw can make the gun body assembly 14 and the gun core housing 1 more firmly connected, thereby improving the stability and safety of the use of the hydrogenation gun, and the light hole 16 is used for inserting the positioning column of the hook wrench when disassembling the threaded connection between the gun body assembly 14 and the gun core housing 1;

[0018] During use, when the tip of the hydrogenation gun is correctly connected to the hydrogenation port on the fuel cell vehicle, the handle on the gun body assembly 14 is pushed, and the push ring 18 is subjected to a force along the axis direction of the tip of the hydrogenation gun through the principle of leverage. Under the push of this force, the push ring 18, the pressure ring 19, the gun head housing 4, and the gun head sleeve 20 will overcome the elastic force of the second spring 21 and move forward relative to the gun core housing 1. During the forward movement of the gun head sleeve 20, the annular step in the inner cavity of the gun head sleeve 20 will act on a section of the inclined surface of the claw piece 22, so that the claw piece 22 is closed and retracted inward to grasp the hydrogenation port. At the same time, the valve core ejector pin 23 will be pushed in the opposite direction by the hydrogenation port to overcome the elastic force of the first spring 24 and move backward, so that the valve core ejector pin 23 is separated from the valve seat sleeve 11 and the gas filling channel 3 is opened. At this time, the hydrogenation gun feeds back a signal to the hydrogenation machine that the hydrogenation port is correctly connected, and the hydrogenation machine controls to start to pass high-pressure gas to the hydrogenation port through the gas filling channel of the hydrogenation gun;

[0019] When high-pressure hydrogen enters the gas filling channel 3 in the hydrogenation gun, the high-pressure gas in the gas filling channel 3 will enter the radial mounting holes 2 on the gun core housing 1 through the first radial through hole 10, the second radial through hole 13, and the annular gap 12 in sequence. The self-locking sealing component in each radial mounting hole 2 will move along the corresponding radial mounting hole 2 in the direction away from the axis of the gun core housing 1 under the action of the high-pressure gas, until the sealing pin 5 in the self-locking sealing component is pressed against the inner wall of the gun head housing 4, generating pressure along the axis of the self-locking sealing component and pointing away from the axis of the gun head housing 4. Under the action of the above-mentioned pressure, a static friction force is generated along the axial direction of the gun head housing 4, and the static friction force will hinder the movement of the gun head housing 4 relative to the gun core housing 1, so that the gun head housing 4 and the gun core housing 1 are locked and fixed, preventing the gun head housing 4 and the gun core housing 1 from relative movement, thereby hindering the claw 22 from opening, and further preventing the high-pressure hydrogenation gun from accidentally disengaging from the hydrogenation port.

[0020] The advantages of the present invention are: (1) when the high-pressure gas is filled inside the gun body, the added self-locking safety structure can prevent the hydrogenation gun from separating from the hydrogenation port, thereby reducing the probability of accidents and improving the safety of use; (2) the power generated by the pre-expansion of the high-pressure gas is fully utilized, and the original structural characteristics of the hydrogenation gun are fully utilized. On the premise of ensuring the air tightness requirements of the hydrogenation gun, the safety of the hydrogenation gun in the working state is improved; and it will automatically unlock after the high-pressure gas is emptied; (3) the structure is compact, and the added self-locking safety structure does not change the overall external dimensions of the hydrogenation gun; (4) during the high-pressure gas filling process, the high-pressure gas enters the various radial mounting holes on the gun core housing through the first radial through hole on the gun core, the second radial through hole on the valve seat sleeve, and the annular gap between the valve seat sleeve and the gun core housing, and then acts on the self-locking sealing components in the various radial mounting holes. The gas channel path is long and tortuous, which effectively prevents local gas pressure mutations, and further improves the safety of the hydrogenation gun in the working state.

[0021] The above description is only a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any modification or equivalent change made based on the technical essence of the present invention still falls within the scope of protection required by the present invention.

Claims

1. A high-pressure hydrogenation gun safety self-locking structure, characterized in that: At least one radial mounting hole is arranged on the gun core shell of the high-pressure hydrogenation gun along the circumferential direction, and all radial mounting holes are connected with the gas filling channel in the hydrogenation gun through the air intake passage. A self-locking sealing component is arranged in each radial mounting hole, and each self-locking sealing component can move along the corresponding radial mounting hole to contact the inner wall of the gun head shell, and can contact and seal with the corresponding radial mounting hole. Each self-locking sealing component includes: a sealing pin arranged in the corresponding radial mounting hole, a circle of annular positioning grooves is arranged on the outer wall of the sealing pin, and O-rings are nested in the annular positioning grooves in sequence along the axial direction of the sealing pin With an open gasket, the O-ring is located on the side close to the axis of the gun core housing; when the gas filling channel in the hydrogenation gun is opened and high-pressure gas is introduced into the hydrogenation port, the high-pressure gas in the gas filling channel will enter the various radial mounting holes on the gun core housing through the air inlet passage, and the self-locking sealing component in each radial mounting hole will move along the corresponding radial mounting hole in the direction away from the axis of the gun core housing under the action of the high-pressure gas until the sealing pin in the self-locking sealing component is pressed against the inner wall of the gun head housing, thereby locking and fixing the gun head housing and the gun core housing to prevent the high-pressure hydrogenation gun from being separated from the hydrogenation port.

2. A high-pressure hydrogenation gun safety self-locking structure according to claim 1, characterized in that: The specific structure of the air intake passage includes: a first radial through hole arranged on the gun core and connected to the gas filling passage of the hydrogenation gun, an annular gap arranged between the valve seat sleeve and the gun core housing and connected to each radial mounting hole, and a second radial through hole arranged on the valve seat sleeve and connected to the first radial through hole and the annular gap. The first radial through hole, the second radial through hole, and the annular gap together form an air intake passage connecting the gas filling passage with each radial mounting hole.

3. A safety self-locking structure for a high-pressure hydrogenation gun according to claim 1 or 2, characterized in that: Three radial mounting holes are arranged on the gun core housing along the circumference, and the three radial mounting holes are evenly distributed along the circumference.

4. A safety self-locking structure for a high-pressure hydrogenation gun according to claim 3, characterized in that: At least one threaded hole and at least one light hole are arranged at the gun core shell portion which is threadedly connected to the gun body assembly. The threaded holes and the light holes are evenly distributed along the circumference. A set screw is arranged in each threaded hole for locking the gun body assembly and the gun core shell which are threadedly connected together.

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