Manual stop valve device suitable for hydrogen storage cylinder valve and operation method of manual stop valve device

Abstract

A valve sleeve is inserted into a through hole in the bottom of a valve cover, a valve bonnet and the valve sleeve are reversely screwed through a double-pin wrench, a gasket is padded into a counter bore in the bottom of the valve sleeve, a clearance fit end of a sealing rod is plugged into the counter bore, and a double-layer spiral check ring is plugged into a groove in the side wall of the lower portion of the counter bore. A second sealing ring and a check ring are installed in an annular groove in the bottom of the sealing rod, assembling of the valve element operation mechanism is completed, the valve sleeve can vertically move under the constraint of the upper limiting face and the lower limiting face, the valve element operation mechanism is assembled to the valve body through a valve sleeve thread pair, and then assembling of the manual stop valve device is completed. The invention further particularly discloses an operation method of the manual stop valve device suitable for the hydrogen storage cylinder valve. The vehicle-mounted hydrogen storage cylinder valve is simple and compact in structure, excellent in high-pressure sealing performance, good in operation performance and visual in opening and closing state due to the fact that the device is provided with an anti-falling limiting function, and is particularly suitable for being applied to a fuel cell vehicle.

Description

Technical Field

[0001] The present invention belongs to the technical field of module integration of manual stop valves for hydrogen storage bottle valves, and in particular relates to a manual stop valve device suitable for hydrogen storage bottle valves and an operating method thereof. Background Art

[0002] As a clean and sustainable new energy, hydrogen energy has been gradually valued and developed rapidly. Fuel cell vehicles, as an important scenario for hydrogen energy application, have been rapidly popularized. In the field of bottle valves for on-board hydrogen systems, module integration is still difficult, especially the integration of manual stop valve modules, which still has room for optimization. Traditional manual stop valves, first of all, have common operation modes such as external hexagonal rods with socket wrenches, double-hole valve stems with double-pin wrenches, etc., which are not very convenient to use tools and operate in practice; secondly, the traditional manual stop valve lacks effective limit during operation, or the limit is increased by adding peripherals such as baffles and blocks, resulting in a complex valve body surface; thirdly, the switch state of the traditional manual stop valve is also difficult to know directly from the appearance, which can easily cause accidents such as pressure operation; finally, after a period of use, the traditional manual stop valve often has internal or external leakage caused by poor sealing or failure, and the stability is not ideal.

[0003] Patent document with application number 202321383426.0 discloses a manual stop valve for a high-pressure hydrogen storage system, which includes a valve body, on which a stop valve module is arranged, the manual stop valve module includes a static iron core, a first flow channel and a second flow channel, a nut is threadedly connected to the static iron core, an electromagnetic coil is sleeved on the static iron core, a moving iron core is also arranged at the bottom of the static iron core, and a ejector pin is threadedly connected to the bottom center of the static iron core; the patented technical solution is provided with an electromagnetic coil, and when the electromagnetic coil is not powered on, the hydrogen storage tank can be inflated through the valve, and the hydrogen flow passes through the second flow channel. Since the pressure in the second flow channel is greater than the pressure in the second cavity, the moving iron core is pushed upward, and the hydrogen flow enters the first cavity and finally enters the bottle. After the inflation is completed, the pressure in the flow channel and the cavity gradually tends to balance, and the rubber and the plug are pushed by the reverse force of the spring to cut off the connection between the hydrogen flow and the downstream channel, with strong sealing to prevent hydrogen leakage. Although this patented technical solution solves the sealing and leakage problems to a certain extent, it uses an electromagnetic coil and solenoid valve structure, the control process is relatively complicated, and there are certain safety hazards in using electrical control in the hydrogen storage field.

[0004] The patent document with application number 202410225619.6 discloses a high-pressure gas cylinder combination valve and a high-pressure gas cylinder with an online replaceable valve assembly, wherein the high-pressure gas cylinder combination valve with an online replaceable valve assembly is installed at the bottle mouth of the high-pressure gas cylinder, the valve body is installed on the bottle mouth of the high-pressure gas cylinder, and the hydrogen filling and supply channel is connected to the high-pressure gas cylinder; the pressure sensor is installed on the hydrogen filling and supply channel; the one-way valve is installed on the hydrogen filling and supply channel, and the one-way valve is used to reversely close the hydrogen filling and supply channel; the solenoid valve is installed on the valve body, and the solenoid valve is used to control the opening and closing of the hydrogen filling and supply channel; the TPRD temperature-driven overpressure safety relief valve is installed on the valve body; the manual stop valve is installed on the valve body, and the manual stop valve controls the connection and cutoff of the hydrogen filling and supply channel and the gas cylinder to the stop valve channel. The manual stop valve recorded in the patent technical solution is a component of the combination valve and is not improved for the manual stop valve. It records a conventional stop valve structure, which has the defects and shortcomings of the traditional manual stop valve described above.

[0005] Patent document with application number 200710175495.1 discloses a high-pressure hydrogen storage bottle combination valve, which includes a one-way valve for charging, a manual stop valve, a solenoid valve, a pressure reducing regulating valve and a safety pressure release device. A one-way valve and a manual stop valve are provided in the gas passage of the hydrogen storage bottle charging inlet, and a gas supply passage is led out between the two valves, and gas is supplied to the outside after passing through the solenoid valve and the pressure reducing regulating valve; another pressure release passage is led out between the manual stop valve and the gas passage connected to the combination valve body, and gas is released to the outside after passing through the safety pressure release device. Since the pressure reducing regulating valve is provided on the gas cylinder valve, and considering the integration of the bottle valve and the measurability of gas and the controllability of output, low-pressure output is possible, so the gas supply output system will have high safety and reliability, and it can also be used as a main valve of the hydrogen storage bottle group. Other gas cylinders in the gas storage bottle group can be decompressed through this main valve and then supplied to the outside. The manual stop valve recorded in the patent technical solution is a component of the combination valve and is not an improvement on the manual stop valve. It records a conventional stop valve structure, which has the defects and shortcomings of the traditional manual stop valve described above. At the same time, it adopts a solenoid valve structure, and the control process is relatively complicated. There are certain safety hazards in using electrical control in the hydrogen storage field. Summary of the invention

[0006] The technical problem solved by the present invention is to provide a simple, compact and easy-to-maintain manual stop valve device suitable for hydrogen storage bottle valves and its operation method. The upper and lower limit designs of the manual stop valve device are ingenious, and the appearance of the valve state is visualized, which ensures the safety of manual operation and is stable and reliable in the sealing performance of high-pressure hydrogen. Compared with the traditional manual stop valve design, it has certain advantages, expands the ideas for the module development of hydrogen storage bottle valves, provides strong protection for the hydrogen safety of the whole vehicle, and can effectively solve the technical problems existing in the background technology.

[0007] In order to solve the above technical problems, the present invention adopts the following technical scheme: a manual stop valve device suitable for a hydrogen storage bottle valve, comprising a valve body and a valve core operating mechanism arranged on the valve body, wherein the interior of the valve body is provided with a valve sleeve installation cavity, a sealing rod installation cavity and a countersunk gas flow channel with successively smaller apertures from top to bottom, wherein the valve sleeve installation cavity is an internal thread structure, and a sealing table is provided at the transition step between the sealing rod installation cavity and the countersunk gas flow channel, an air inlet interface is provided on one side of the valve body, and the air inlet interface is communicated with the lower part of the countersunk gas flow channel through the air inlet flow channel arranged inside the valve body, and an air outlet interface is provided on the other side of the valve body, and the air outlet interface is communicated with the lower part of the sealing rod installation cavity through the air outlet flow channel arranged inside the valve body; the valve core operating mechanism is mainly composed of a valve cover, a valve cap, a valve sleeve and a sealing rod, wherein the outer surface of the valve cover The lower part of the periphery is a threaded pair, the middle part of the outer periphery of the valve cover is a hexagonal structure for installation and tightening with a wrench, the upper part of the valve cover is a cylindrical structure, the inside of the valve cover is a through hole with a countersunk platform, the valve bonnet is a cylindrical structure, and the lower part of the middle through hole of the valve bonnet is provided with a reverse threaded pair for connecting the valve sleeve, and the top of the valve sleeve is an internal hexagonal countersunk hole structure for switch operation with a hexagonal wrench. The upper outer periphery of the valve sleeve is connected to the valve bonnet through a reverse threaded pair, and the lower outer periphery of the valve sleeve is screwed into the valve sleeve installation cavity through a straight thread. A countersunk hole is provided at the bottom of the valve sleeve and a groove is provided on the lower side wall of the countersunk hole. The sealing rod is embedded in the countersunk hole at the bottom of the valve sleeve and is limited by a double-layer spiral retaining ring. The lower part of the sealing rod extends into the sealing rod installation cavity and a sealing convex surface matching the sealing table surface is provided at the bottom of the sealing rod. The sealing convex surface is pressed and sealed with the sealing table surface to form a main sealing structure.

[0008] Furthermore, the surface roughness of the sealing table is not less than 1.6 μm, and the perpendicularity to the center line of the counterbore gas flow channel is not less than 4 μm.

[0009] Furthermore, after the threaded pair at the lower part of the outer periphery of the valve cover is connected to the valve body, the back cut groove at the top of the nut pair and the valve body form a groove for filling the first sealing ring, which is used to achieve axial sealing between the valve body and the valve cover to prevent leakage.

[0010] Furthermore, two countersunk holes for installing the valve bonnet are evenly arranged on the top of the valve bonnet.

[0011] Furthermore, a gasket for leveling and fixing is provided in the groove of the countersunk hole at the bottom of the valve sleeve.

[0012] Furthermore, an annular groove is provided on the outer periphery of the lower portion of the sealing rod, and a second sealing ring and a retaining ring are installed in the annular groove to form a radial peripheral seal between the valve body and the sealing rod to prevent internal leakage.

[0013] The operating method of the manual stop valve device suitable for the hydrogen storage bottle valve of the present invention has the following specific operating process: Assembly status of stop valve: first insert the valve sleeve into the through hole at the bottom of the valve cover, then use a double-pin wrench to screw the valve cap and the valve sleeve in the opposite direction to the bottom, then insert a gasket into the countersunk hole at the bottom of the valve sleeve, insert the clearance fitting end of the sealing rod into the countersunk hole at the bottom of the valve sleeve, and insert a double-layer spiral retaining ring into the groove on the lower side wall of the countersunk hole at the bottom of the valve sleeve to achieve the limit fixation of the sealing rod, finally install the second sealing ring and retaining ring in the annular groove at the bottom of the sealing rod to complete the assembly of the valve core operating mechanism. The valve sleeve can move vertically under the constraints of the upper and lower limit surfaces, and the valve core operating mechanism is assembled to the valve body through the valve sleeve thread pair, that is, the assembly of the manual stop valve device is completed; The stop valve is in the closed state: insert a hexagonal wrench into the hexagonal countersunk hole structure at the top of the valve core operating mechanism and rotate it clockwise according to the torque. The valve sleeve drives the sealing rod to move downward through the threaded pair on the outer periphery of the valve sleeve. The sealing convex surface of the sealing rod and the sealing table surface of the valve body are pressed and sealed together. The stop valve is in the closed state. At this time, observe the top of the valve core operating mechanism. The top surface of the valve cover and the top surface of the valve bonnet are flush. This is used as the identification of the closed state of the manual stop valve device. If the clockwise torque is continued to be increased to tighten, the countersunk surface inside the valve cover limits the excessive downward movement of the valve core operating mechanism, which can protect the sealing rod from excessive extrusion and damage; The stop valve is in the open state: insert a hexagonal wrench into the hexagonal countersunk structure at the top of the valve sleeve at the top of the valve core operating mechanism and rotate it counterclockwise according to the torque. The valve sleeve drives the sealing rod to move upward through the outer peripheral thread pair of the valve sleeve. The sealing convex surface of the sealing rod and the sealing table surface of the valve body are gradually separated. When the upper end surface of the valve sleeve is completely in contact with the lower end surface of the valve cover, the stop valve is in the open state. At this time, observe the top of the valve core operating mechanism. The top surface of the valve cover is 2 to 5 centimeters lower than the top surface of the valve cap. This is used as an identification of the open state of the manual stop valve device. When the valve core operating mechanism moves upward, the lower end surface of the valve cover plays a limiting role, which can prevent the valve core operating mechanism from being excessively twisted upward and causing collapse.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects: the present invention has a simple and compact structure, excellent high-pressure sealing, and the device is designed with an anti-drop limiter, good operating performance and visualized switch status, which is particularly suitable for on-board hydrogen storage bottle valves for fuel cell vehicles, and provides a better solution for the current integrated design of high-pressure hydrogen storage bottle valves. The present invention has high integration and novel design, and effectively ensures the safety and reliability of hydrogen use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall cross-sectional view of the present invention; Figure 2 is a cross-sectional view of a valve body of the present invention; Figure 3 It is a cross-sectional view of the valve core of the present invention; Figure 4 A sectional view of the manual stop valve of the present invention in a closed state; Figure 5 It is a cross-sectional view of the manual stop valve of the present invention in an open state.

[0016] In the figure: 1-valve body, 101-valve sleeve installation cavity, 102-sealing rod installation cavity, 103-sunk hole gas flow channel, 104-sealing table, 105-air inlet interface, 106-air inlet flow channel, 107-air outlet interface, 108-air outlet flow channel; 2-valve core operating mechanism; 3-valve cover; 4-valve cap; 5-first sealing ring; 6-valve sleeve; 7-ultra-thin gasket; 8-sealing rod; 9-double-layer spiral retaining ring; 10-retaining ring; 11-second sealing ring. DETAILED DESCRIPTION

[0017] The specific contents of the present invention are described in detail with reference to the accompanying drawings.

[0018] like Figure 1 As shown, the manual stop valve device suitable for a hydrogen storage bottle valve described in the present invention has a main body including a valve body and a valve core operating mechanism.

[0019] like Figure 2 As shown, a mounting hole is provided on the valve body to facilitate the installation and fixation of the manual stop valve device; a countersunk hole and a flow channel are provided inside the valve body, and the countersunk hole includes a valve sleeve mounting cavity, a sealing rod mounting cavity and a countersunk hole gas flow channel for installing the valve core operating mechanism; the flow channel is divided into an inlet flow channel and an outlet flow channel, one end of the inlet flow channel is connected to the air inlet interface, and the other end of the inlet flow channel is connected to the countersunk hole gas flow channel at the bottom of the sealing table; one end of the outlet flow channel is connected to the sealing rod mounting cavity at the upper part of the sealing table, and the other end of the outlet flow channel is connected to the air outlet interface.

[0020] like Figure 3 As shown in the figure, the valve core operating mechanism is mainly composed of a valve cover, a valve bonnet, a valve sleeve and a sealing rod. The valve bonnet is connected to the valve sleeve through a mounting hole, and the valve cover is between the valve bonnet and the valve sleeve. The lower baffle surface of the valve bonnet contacts the countertop of the valve cover, and the lower end surface of the valve bonnet contacts the upper end surface of the valve sleeve to form a limit. A first sealing ring is arranged at the bottom of the valve cover to form an axial seal between the valve body and the valve cover, which can effectively prevent the leakage of hydrogen. A countersunk hole is arranged at the bottom of the valve sleeve, and the sealing rod is fixed by a double-layer spiral retaining ring. The ultra-thin gasket is used for leveling and fixing. The sealing rod is made of modified polyetheretherketone, and an annular groove is arranged on its waist for installing the second sealing ring and retaining ring to form a radial peripheral static seal between the valve body and the sealing rod, which is used for sealing when the stop valve is in the open state, and can prevent the leakage of hydrogen. A sealing convex surface is milled at the bottom of the sealing rod, and the sealing convex surface and the sealing table of the valve body are in contact and pressed to form an effective shutoff.

[0021] like Figure 4As shown in the figure, the manual stop valve is in the closed state. The sealing convex surface of the sealing rod contacts and presses the sealing surface of the valve body to form an effective stop, and the valve is in the closed state. The top surface of the valve cap is flush with the top surface of the valve cover, which can identify that the valve is in the closed state.

[0022] like Figure 5 As shown, the manual stop valve is in the open state. The sealing convex surface of the sealing rod is separated from the sealing surface of the valve body. The high-pressure hydrogen passes through the inlet flow channel and the sealing surface to reach the outlet flow channel. The high-pressure hydrogen in the sealing rod installation cavity and the countersunk gas flow channel inside the valve body is effectively sealed by the second sealing ring. The first sealing ring is close to the outside as a second insurance to prevent slight leakage. At this time, the valve is in the open state, and the top surface of the valve cap exceeds the top surface of the valve cover by about 3mm. It can be identified that the valve is in the open state.

[0023] Combined with Figure 1-5 The specific structure of the present invention is described in detail. The manual stop valve device suitable for hydrogen storage bottle valves described in the present invention includes a valve body 1 and a valve core operating mechanism 2 arranged on the valve body 1. The valve body 1 is provided with a valve sleeve installation cavity 101, a sealing rod installation cavity 102 and a countersunk gas flow channel 103 with successively smaller apertures from top to bottom, wherein the valve sleeve installation cavity 101 is an internal thread structure, and a sealing table surface 104 is provided at the transition step between the sealing rod installation cavity 102 and the countersunk gas flow channel 103. An air inlet interface 105 is provided on one side of the valve body 1, and the air inlet interface 105 is communicated with the lower part of the countersunk gas flow channel 103 through an air inlet flow channel 106 arranged inside the valve body 1. An air outlet interface 107 is provided on the other side of the valve body 1, and the air outlet interface 107 is communicated with the lower part of the sealing rod installation cavity 102 through an air outlet flow channel 108 arranged inside the valve body 1; the valve core operating mechanism 2 is mainly composed of a valve cover 3, a valve cap 4, a valve sleeve 6 and a sealing The sealing rod 8 is composed of a sealing rod 8, wherein the lower part of the outer periphery of the valve cover 3 is a threaded pair, the middle part of the outer periphery of the valve cover 3 is a hexagonal structure for installation and tightening with a wrench, the upper part of the valve cover 3 is a cylindrical structure, the interior of the valve cover 3 is a through hole with a countersunk platform, the valve bonnet 4 is a cylindrical structure, and the lower part of the middle through hole of the valve bonnet 4 is provided with a reverse threaded pair for connecting the valve sleeve 6, the top of the valve sleeve 6 is an inner hexagonal countersunk hole structure for switch operation with a hexagonal wrench, the upper outer periphery of the valve sleeve 6 is connected to the valve bonnet 4 through a reverse threaded pair, the lower outer periphery of the valve sleeve 6 is screwed into the valve sleeve installation cavity 101 through a straight thread, the bottom of the valve sleeve 6 is provided with a countersunk hole and a groove is provided on the lower side wall of the countersunk hole, the sealing rod 8 is embedded in the countersunk hole at the bottom of the valve sleeve 6 and is limited by a double-layer spiral retaining ring 9, the lower part of the sealing rod 8 extends into the sealing rod installation cavity 102 and a sealing convex surface matching the sealing table 104 is provided at the bottom of the sealing rod 8, and the sealing convex surface is pressed and sealed with the sealing table 104 to form a main sealing structure.

[0024] The surface roughness of the sealing table 104 described in the present invention is not less than 1.6μm, and the perpendicularity to the center line of the counterbore gas flow channel 103 is not less than 4μm. After the threaded pair at the lower part of the outer periphery of the valve cover 3 described in the present invention is connected to the valve body 1, the top cutter groove of the threaded pair and the valve body 1 form a groove for filling the first sealing ring 5, which is used to realize the axial sealing between the valve body 1 and the valve cover 3 to prevent external leakage. Two countersunk holes for installing the valve cover 4 are evenly arranged on the top of the valve cap 4 described in the present invention. An ultra-thin gasket for leveling and fixing is provided in the groove of the countersunk hole at the bottom of the valve sleeve 6 described in the present invention. An annular groove is provided on the outer periphery of the lower part of the sealing rod 8 described in the present invention, and a second sealing ring 11 and a retaining ring 10 are installed in the annular groove, which is used to realize the radial peripheral sealing between the valve body 1 and the sealing rod 8 to prevent internal leakage.

[0025] The specific operation process of the manual stop valve device suitable for the hydrogen storage bottle valve of the present invention is as follows: Assembly status of stop valve: first insert the valve sleeve into the through hole at the bottom of the valve cover, then use a double-pin wrench to screw the valve cap and the valve sleeve in the opposite direction to the bottom, then insert a fixed number of ultra-thin gaskets in the countersunk hole at the bottom of the valve sleeve, insert the clearance fitting end of the sealing rod and insert a double-layer spiral retaining ring in the groove on the lower side wall of the countersunk hole to achieve the limit fixation of the sealing rod, finally install the second sealing ring and retaining ring in the annular groove at the bottom of the sealing rod to complete the assembly of the valve core operating mechanism. The valve sleeve can move vertically under the constraints of the upper and lower limit surfaces, and the valve core operating mechanism is assembled to the valve body through the valve sleeve thread pair, that is, the assembly of the manual stop valve device is completed; The stop valve is in the closed state: insert a hexagonal wrench into the hexagonal countersunk structure at the top of the valve sleeve at the top of the valve core operating mechanism and rotate it clockwise according to the torque. The valve sleeve drives the sealing rod to move downward through the threaded pair on the outer periphery of the valve sleeve. The sealing convex surface of the sealing rod and the sealing table surface of the valve body countersunk hole are tightly pressed and sealed. The stop valve is in the closed state. At this time, observe the top of the valve core operating mechanism. The top surface of the valve cover and the top surface of the valve bonnet are flush. This is used as an identification of the closed state of the manual stop valve device. If the torque continues to be increased clockwise to tighten, the countersunk surface of the valve cover limits the excessive downward movement of the valve core operating mechanism, which can protect the sealing rod from excessive extrusion and damage; The stop valve is in the open state: insert a hexagonal wrench into the hexagonal countersunk structure on the top of the valve sleeve at the top of the valve core operating mechanism and rotate it counterclockwise according to the torque. The valve sleeve drives the sealing rod to move upward through the outer peripheral thread pair of the valve sleeve. The sealing convex surface of the sealing rod and the sealing table surface of the valve body countersunk hole are gradually separated. When the upper end face of the valve sleeve is completely fitted with the lower end face of the valve cover, the stop valve is in the open state. At this time, observe the top of the valve core operating mechanism. The top surface of the valve cover is 2 to 4 centimeters lower than the top surface of the valve cap. As an identification of the open state of the manual stop valve device, when the valve core operating mechanism moves upward, the lower end surface of the valve cover plays a limiting role, which can prevent the valve core operating mechanism from being excessively twisted upward and causing collapse.

[0026] The above embodiments describe the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the scope of the principles of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of protection of the present invention.

Claims

1. A manual stop valve device suitable for a hydrogen storage bottle valve, characterized in that 1. The closure of the valve body is made up of a plurality of closure members, each of which is a plurality of closure members, each of which is a plurality of closure members having a plurality of closure members, and each of which is a plurality of closure members having a plurality of closure members. The closure of the valve body is made up of a plurality of closure members, each of which is a plurality of closure members having a plurality of closure members. The hexagonal structure is tightened, the upper part of the valve cover is a cylindrical structure, the inside of the valve cover is a through hole with a countersunk platform, the valve cap is a cylindrical structure, the lower part of the middle through hole of the valve cap is provided with a reverse thread pair for connecting the valve sleeve, the top of the valve sleeve is an inner hexagonal countersunk hole structure for hexagonal wrench switch operation, the upper periphery of the valve sleeve is connected to the valve bonnet through a reverse thread pair, the lower periphery of the valve sleeve is screwed into the valve sleeve installation cavity through a straight thread, the bottom of the valve sleeve is provided with a countersunk hole and the lower side wall of the countersunk hole is provided with a groove, the sealing rod is embedded in the countersunk hole at the bottom of the valve sleeve and is limited by a double-layer spiral retaining ring, the lower part of the sealing rod extends into the sealing rod installation cavity and a sealing convex surface matching the sealing table surface is provided at the bottom of the sealing rod, the sealing convex surface is pressed and sealed with the sealing table surface to form a main sealing structure.

2. The manual stop valve device suitable for a hydrogen storage bottle valve according to claim 1 is characterized in that: The surface roughness of the sealing table is not less than 1.6 μm, and the perpendicularity to the center line of the countersunk gas flow channel is not less than 4 μm.

3. The manual stop valve device suitable for a hydrogen storage bottle valve according to claim 2 is characterized in that: After the threaded pair at the lower part of the outer periphery of the valve cover is connected to the valve body, the back cut groove at the top of the nut pair and the valve body form a groove for filling the first sealing ring, which is used to achieve axial sealing between the valve body and the valve cover to prevent leakage.

4. The manual stop valve device suitable for a hydrogen storage bottle valve according to claim 3 is characterized in that: The top of the valve cap is evenly provided with two countersunk holes for installing the valve cap.

5. The manual stop valve device suitable for a hydrogen storage bottle valve according to claim 4 is characterized in that: A gasket for leveling and fixing is arranged in the groove of the countersunk hole at the bottom of the valve sleeve.

6. The manual stop valve device suitable for hydrogen storage bottle valve according to claim 5 is characterized in that: An annular groove is provided on the outer periphery of the lower part of the sealing rod, and a second sealing ring and a retaining ring are installed in the annular groove to form a radial outer periphery seal between the valve body and the sealing rod to prevent internal leakage.

7. The operating method of the manual stop valve device suitable for hydrogen storage bottle valve according to claim 6, characterized in that The specific operation process is: Assembly status of stop valve: first insert the valve sleeve into the through hole at the bottom of the valve cover, then use a double-pin wrench to screw the valve cap and the valve sleeve in the opposite direction to the bottom, then insert a gasket into the countersunk hole at the bottom of the valve sleeve, insert the clearance fitting end of the sealing rod into the countersunk hole at the bottom of the valve sleeve, and insert a double-layer spiral retaining ring into the groove on the lower side wall of the countersunk hole at the bottom of the valve sleeve to achieve the limit fixation of the sealing rod, finally install the second sealing ring and retaining ring in the annular groove at the bottom of the sealing rod to complete the assembly of the valve core operating mechanism. The valve sleeve can move vertically under the constraints of the upper and lower limit surfaces, and the valve core operating mechanism is assembled to the valve body through the valve sleeve thread pair, that is, the assembly of the manual stop valve device is completed; The stop valve is in the closed state: insert a hexagonal wrench into the hexagonal countersunk hole structure at the top of the valve core operating mechanism and rotate it clockwise according to the torque. The valve sleeve drives the sealing rod to move downward through the threaded pair on the outer periphery of the valve sleeve. The sealing convex surface of the sealing rod and the sealing table surface of the valve body are pressed and sealed together. The stop valve is in the closed state. At this time, observe the top of the valve core operating mechanism. The top surface of the valve cover and the top surface of the valve bonnet are flush. This is used as the identification of the closed state of the manual stop valve device. If the clockwise torque is continued to be increased to tighten, the countersunk surface inside the valve cover limits the excessive downward movement of the valve core operating mechanism, which can protect the sealing rod from excessive extrusion and damage; The stop valve is in the open state: insert a hexagonal wrench into the hexagonal countersunk structure at the top of the valve sleeve at the top of the valve core operating mechanism and rotate it counterclockwise according to the torque. The valve sleeve drives the sealing rod to move upward through the outer peripheral thread pair of the valve sleeve. The sealing convex surface of the sealing rod and the sealing table surface of the valve body are gradually separated. When the upper end surface of the valve sleeve is completely in contact with the lower end surface of the valve cover, the stop valve is in the open state. At this time, observe the top of the valve core operating mechanism. The top surface of the valve cover is 2 to 5 centimeters lower than the top surface of the valve cap. This is used as an identification of the open state of the manual stop valve device. When the valve core operating mechanism moves upward, the lower end surface of the valve cover plays a limiting role, which can prevent the valve core operating mechanism from being excessively twisted upward and causing collapse.

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