Hydrogenation control device

Abstract

The hydrogenation control device comprises a control air cylinder, the control air cylinder comprises a cylinder body and cylinder cover assembly, a piston, a compression spring and a check valve, the cylinder body and cylinder cover assembly comprises a cylinder barrel, a high-pressure air inlet, a low-pressure air inlet, an air outlet and a feedback air opening, the high-pressure air inlet is located in the middle of the upper portion of the cylinder barrel, and the air outlet is located in the lower portion of the cylinder barrel; the cylinder barrel is arranged in the cylinder barrel; the low-pressure air inlet is located at the front end of the cylinder barrel, the check valve is installed at the front end of the cylinder barrel, and the feedback air port is located at the rear end of the cylinder barrel. The front part of the piston comprises a cylindrical guide part, and the upper part of the guide part seals the high-pressure air inlet; the lower wall of the cylindrical guide part comprises an avoiding groove of the air outlet, and the upper wall of the cylindrical guide part comprises an air inlet through hole; when the piston moves forwards to a limit position, the air inlet through hole is communicated with the high-pressure air inlet; the pressure spring is installed between the rear end face of the piston and the rear wall of the cylinder barrel. The control air cylinder can be used for automatically switching the hydrogenation machine from a low-pressure air source to a high-pressure air source, and the structure is simple.

Description

Technical Field

[0001] The invention relates to hydrogenation equipment, and in particular to a hydrogenation control device. Background Art

[0002] In the field of hydrogen refueling technology, the vehicle gas cylinder is generally refueled with hydrogen by utilizing the pressure difference between the pressure of the high-pressure gas stored in the high-pressure hydrogen storage tank and the pressure of the remaining gas in the vehicle gas cylinder. When the pressure on both sides is equalized, the vehicle will no longer be refilled with gas.

[0003] When refueling a vehicle, in order to make full use of the hydrogen in the hydrogen tank, the hydrogen tanks need to be used in sequence, that is, after a low-pressure hydrogen tank (or tank group) is filled to the same pressure as the vehicle's gas cylinder, switch to the next high-pressure hydrogen tank (or tank group), rather than opening all hydrogen tanks at the same time.

[0004] In order to automatically realize the above-mentioned sequential output function, hydrogen refueling stations usually use PLC sequential control panels to control the on and off of pneumatic valves through pressure signals or flow signals fed back by sensors. This hydrogen refueling method requires the use of multiple pressure sensors or flow sensors and multiple control valves. The equipment structure is complex and the cost is high. At the same time, the instruments may be interfered with, affecting their normal operation.

[0005] The technical problem to be solved by the present invention is to provide a hydrogenation control device which can automatically switch a hydrogenation machine from a low-pressure gas source to a high-pressure gas source.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a hydrogenation control device, comprising at least one control cylinder, the control cylinder comprising a cylinder body and cylinder head assembly, a piston, a compression spring and a check valve, the cylinder body and cylinder head assembly comprising a cylinder barrel, a high-pressure air inlet, a low-pressure air inlet, an air outlet and a feedback air port, the axis of the cylinder barrel is arranged horizontally, the high-pressure air inlet is located in the middle part of the upper part of the cylinder barrel, the air outlet is located in the lower part of the cylinder barrel and is connected with the middle part of the cylinder barrel; the low-pressure air inlet is located at the front end of the cylinder barrel, the check valve is installed at the front end of the cylinder barrel or in the low-pressure air inlet, and the feedback air port is located at the rear end of the cylinder barrel; the front part of the piston comprises a cylindrical guide part, the upper part of the guide part closes the high-pressure air inlet, and the guide part of the piston is slidably matched with the cylinder barrel; the lower wall of the cylindrical guide part comprises an avoidance groove of the air outlet, and the upper wall of the cylindrical guide part comprises an air inlet through hole; when the piston moves forward to the limit position, the air inlet through hole is connected with the high-pressure air inlet; the compression spring is installed between the rear end surface of the compression spring and the rear wall of the cylinder barrel.

[0007] The above-mentioned hydrogenation control device comprises two control cylinders, the high-pressure air inlet of the second control cylinder is connected to the air outlet of the first control cylinder, and the feedback air port of the second control cylinder is connected to the feedback air port of the first control cylinder.

[0008] In the hydrogenation control device described above, the high-pressure air inlet of the first control cylinder is connected to a high-pressure gas source, and the low-pressure air inlet of the first control cylinder is connected to a medium-pressure gas source; the low-pressure air inlet of the second control cylinder is connected to a low-pressure gas source, the air outlet of the second control cylinder is connected to the inlet of the hydrogenation machine, and the feedback air port of the second control cylinder and the feedback air port of the first control cylinder are connected to the outlet of the hydrogenation machine.

[0009] The hydrogenation control device described above, the cylinder block and cylinder head assembly includes a cylinder block, a front cylinder head and a rear cylinder head, the cylinder barrel, the high-pressure air inlet and the air outlet are arranged in the cylinder block, the front cylinder head is fixed to the front end of the cylinder block, and the rear cylinder head is fixed to the rear end of the cylinder block; the low-pressure air inlet is arranged on the front cylinder head, and the feedback air port is arranged on the rear cylinder head.

[0010] In the hydrogenation control device described above, the front cylinder head includes a check valve mounting seat, the check valve mounting seat extends into the front end of the cylinder barrel, and the check valve is mounted on the check valve mounting seat; the rear cylinder head includes a spring seat, the spring seat extends into the rear end of the cylinder barrel, and the compression spring is arranged in the spring seat. When the piston moves backward to the extreme position, the rear end surface of the piston abuts against the spring seat.

[0011] The hydrogenation control device described above includes two control cylinders, the cylinder body of the first control cylinder and the cylinder body of the second control cylinder are connected to form a cylinder body assembly, and the high-pressure air inlet of the second control cylinder is connected to the air outlet of the first control cylinder; the front cylinder head of the first control cylinder and the front cylinder head of the second control cylinder are connected to form a front cylinder head assembly, and the rear cylinder head of the first control cylinder and the rear cylinder head of the second control cylinder are connected to form a rear cylinder head assembly.

[0012] The above-mentioned hydrogenation control device, during hydrogenation operation, includes the following working processes: Initial state: the valve of the hydrogenator is closed, the outlet of the hydrogenator is pressure-free, the feedback ports of the two control cylinders are pressure-free, the piston of the first control cylinder is at the rear limit position under the action of the medium-pressure gas source, and the guide portion of the first control cylinder piston closes the high-pressure air inlet of the first control cylinder; the piston of the second control cylinder is at the rear limit position under the action of the low-pressure gas source, and the guide portion of the second control cylinder piston closes the high-pressure air inlet of the second control cylinder; Low-pressure hydrogenation state: the valve of the hydrogenator is opened, and the low-pressure gas source connected to the low-pressure air inlet of the second control cylinder pushes open the check valve of the second control cylinder, and outputs low-pressure hydrogen through the cylinder barrel of the second control cylinder, the air outlet of the second control cylinder, the inlet of the hydrogenator and the outlet of the hydrogenator; Medium-pressure hydrogenation state: When the air pressure at the outlet of the hydrogenator is close to the air supply pressure of the low-pressure gas source, the air pressure at the outlet of the hydrogenator is applied to the back of the piston of the second control cylinder through the feedback air port of the second control cylinder, and is superimposed with the thrust of the compression spring of the second control cylinder to overcome the pressure applied by the low-pressure gas source on the front of the piston of the second control cylinder. The piston of the second control cylinder moves forward to the limit position, and the high-pressure air inlet of the second control cylinder is opened. The medium-pressure air source connected to the low-pressure air inlet of the first control cylinder pushes open the check valve of the first control cylinder, and the medium-pressure hydrogen passes through the cylinder barrel of the first control cylinder, the air outlet of the first control cylinder, the high-pressure air inlet of the second control cylinder, and enters the cylinder barrel of the second control cylinder, and the check valve of the second control cylinder is closed; the hydrogen entering the cylinder barrel of the second control cylinder outputs medium-pressure hydrogen from the air outlet of the second control cylinder, the inlet of the hydrogenator and the outlet of the hydrogenator; High-pressure hydrogenation state: when the air pressure at the outlet of the hydrogenator is close to the gas supply pressure of the medium-pressure gas source, the air pressure at the outlet of the hydrogenator is applied to the back of the piston of the first control cylinder through the feedback air port of the first control cylinder, and is superimposed with the thrust of the compression spring of the first control cylinder, overcoming the pressure applied by the medium-pressure gas source on the front of the piston of the first control cylinder. The piston of the first control cylinder moves forward to the limit position, the high-pressure air inlet of the first control cylinder opens, and high-pressure hydrogen enters the cylinder barrel of the first control cylinder, and the check valve of the first control cylinder is closed; the hydrogen entering the cylinder barrel of the first control cylinder then enters the cylinder barrel of the second control cylinder from the air outlet of the first control cylinder, and the hydrogen entering the cylinder barrel of the second control cylinder outputs high-pressure hydrogen from the air outlet of the second control cylinder, the inlet of the hydrogenator and the outlet of the hydrogenator until the high-pressure hydrogenation is completed.

[0013] In the hydrogenation control device described above, the cylinder is a non-circular cylinder, and the piston is a non-circular piston.

[0014] The hydrogenation control device of the present invention can automatically switch the hydrogenation machine from a low-pressure gas source to a high-pressure gas source by using a control cylinder, does not require a complex control system, and has a simple device structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] Figure 1 It is a stereoscopic diagram of a hydrogenation control device according to an embodiment of the present invention.

[0017] Figure 2 It is a stereoscopic diagram from another perspective of the hydrogenation control device according to an embodiment of the present invention.

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the control cylinder of the hydrogenation control device according to an embodiment of the present invention.

[0019] Figure 4It is a schematic diagram of the cross-sectional structure of the hydrogenation control device according to an embodiment of the present invention.

[0020] Figure 5 It is a schematic diagram of the principle of the initial state of the hydrogenation process of an embodiment of the present invention.

[0021] Figure 6 It is a schematic diagram of the principle of the low-pressure hydrogenation state of the hydrogenation process in an embodiment of the present invention.

[0022] Figure 7 It is a schematic diagram of the principle of the pressure hydrogenation state in the hydrogenation process of an embodiment of the present invention.

[0023] Figure 8 It is a schematic diagram of the principle of the high-pressure hydrogenation state of the hydrogenation process in an embodiment of the present invention.

[0024] Fig. 9 yes Figure 4 AA section view in. DETAILED DESCRIPTION

[0025] The structure and principle of the hydrogenation control device of the embodiment of the present invention are as follows: Figures 1 to 9 As shown, it includes two control cylinders 10, the control cylinder 10 includes a cylinder body and cylinder head assembly 30, a piston 12, a compression spring 13 and a check valve 14, and the cylinder body and cylinder head assembly 30 of the control cylinder 10 includes a cylinder barrel 15, a high-pressure air inlet 16, a low-pressure air inlet 17, an air outlet 18 and a feedback air port 19.

[0026] The cylinder block and cylinder head assembly 30 includes a cylinder block 31 , a front cylinder head 32 and a rear cylinder head 33 . The front cylinder head 32 is fixed to the front end of the cylinder block 31 , and the rear cylinder head 33 is fixed to the rear end of the cylinder block 31 .

[0027] The cylinder 15 is arranged in the cylinder body 31, and the axis of the cylinder 15 is arranged horizontally. The high-pressure air inlet 16 and the air outlet 18 are arranged in the cylinder body 31, the high-pressure air inlet 16 is located in the middle part of the upper part of the cylinder 15, and the air outlet 18 is located in the lower part of the cylinder 15 and communicates with the middle part of the cylinder 15. The low-pressure air inlet 17 is arranged on the front cylinder cover 32, located at the front end of the cylinder 15. The check valve 14 is installed at the front end of the cylinder 15 or in the low-pressure air inlet 17. In this embodiment, the front cylinder cover 32 includes a check valve mounting seat 34, the check valve mounting seat 34 extends into the front end of the cylinder 15, and the check valve is installed on the check valve mounting seat 34.

[0028] The feedback air port 19 is arranged on the rear cylinder cover 33, and is located at the rear end of the cylinder barrel 15. The front cylinder cover 32 includes a check valve mounting seat 34, which extends into the front end of the cylinder barrel, and the check valve 14 is mounted on the check valve mounting seat 34.

[0029] The front portion of the piston 12 includes a cylindrical guide portion 121, and the upper portion of the guide portion 121 closes the high-pressure air inlet 16. The guide portion 121 of the piston 12 is slidably matched with the cylinder 15. The lower wall of the cylindrical guide portion 121 includes an avoidance groove 122 for the air outlet, and the upper wall of the cylindrical guide portion 121 includes an air intake hole 123. When the piston 12 moves forward to the extreme position, the air intake hole 123 is connected to the high-pressure air inlet 16. In order to prevent the piston 12 from rotating in the cylinder 15, the cylinder 15 is a non-circular cylinder, and the piston 12 matched therewith is a non-circular piston. In this embodiment, the cross-sectional shape of the piston 12 and the cylinder 15 is a large bow shape, and the cross-sectional shape and matching structure of the cylinder 15 and the piston 12 are as shown in FIG. Fig. 9 shown.

[0030] The rear cylinder cover 33 includes a spring seat 35, which extends into the rear end of the cylinder barrel 15. The compression spring 13 is arranged in the spring seat 35. The front end of the compression spring 13 presses against the rear end surface of the pull surface of the piston 12. When the piston 12 moves backward to the extreme position, the rear end surface of the piston 12 presses against the spring seat 35.

[0031] In this embodiment, the high-pressure air inlet 16A of the first control cylinder 10A is connected to a high-pressure air source, and the low-pressure air inlet 17A of the first control cylinder 10A is connected to a medium-pressure air source. The low-pressure air inlet 17B of the second control cylinder 10B is connected to a low-pressure air source, the air outlet 18B of the second control cylinder 10B is connected to the inlet 22 of the hydrogenation machine 20, and the feedback air port 19B of the second control cylinder 10B is connected in parallel with the feedback air port 19A of the first control cylinder 10A and connected to the outlet 23 of the hydrogenation machine 20.

[0032] like Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the cylinder body and cylinder head assemblies 30A and 30B of the first control cylinder are combined together. The cylinder body 31A of the first control cylinder is connected to the cylinder body 31B of the second control cylinder to form a cylinder body assembly 31C, and the high-pressure air inlet 16B of the second control cylinder is connected to the air outlet 18A of the first control cylinder. The front cylinder head 32A of the first control cylinder is connected to the front cylinder head 32B of the second control cylinder to form a front cylinder head assembly 32C, and the rear cylinder head 33A of the first control cylinder is connected to the rear cylinder head 33B of the second control cylinder to form a rear cylinder head assembly 33C.

[0033] The hydrogenation control device of the embodiment of the present invention includes the following working process during the hydrogenation operation: Initial state: Figure 5As shown, the valve 21 of the hydrogenator 20 is closed, the outlet 23 of the hydrogenator 20 is pressure-free, the feedback ports 19A and 19B of the two control cylinders 10 are pressure-free, and the piston 12A of the first control cylinder 10A is at the rear limit position under the action of the medium-pressure gas source, and the guide portion 121 of the piston 12A of the first control cylinder 10A closes the high-pressure air inlet 16A of the first control cylinder 10A. The piston 12B of the second control cylinder 10B is at the rear limit position under the action of the low-pressure gas source, and the guide portion 121 of the piston 12B of the second control cylinder 10B closes the high-pressure air inlet 16B of the second control cylinder 10B. Because the valve 21 of the hydrogenator 20 is not opened, when the pressure in the cylinder 15B approaches the pressure of the low-pressure gas source, the check valve 14B of the low-pressure air inlet 17B of the second control cylinder 10B is also closed.

[0034] Low pressure hydrogenation state: Figure 6 As shown, after the valve 21 of the hydrogenator 20 is opened, the pressure in the cylinder 15B is released, and the low-pressure gas source connected to the low-pressure air inlet 17B of the second control cylinder 10B pushes open the check valve 14B of the second control cylinder 10B, and the low-pressure hydrogen is output through the cylinder 15B of the second control cylinder 10B, the air outlet 18B of the second control cylinder 10B, the inlet 22 of the hydrogenator 20 and the outlet 23 of the hydrogenator 20.

[0035] Medium pressure hydrogenation state: Figure 7 As shown, when the air pressure at the outlet 23 of the hydrogenation machine 20 is close to the air supply pressure of the low-pressure air source, the air pressure at the outlet 23 of the hydrogenation machine 20 is applied to the back of the piston 12B of the second control cylinder 10B through the feedback air port 19B of the second control cylinder 10B, and is superimposed with the thrust of the compression spring 13B of the second control cylinder 10B, overcoming the pressure applied by the low-pressure air source on the front of the piston 12B of the second control cylinder 10B, and the piston 12B of the second control cylinder 10B moves forward to the limit position, and the second control cylinder 10B is pressed. The high-pressure air inlet 16B of the first control cylinder 10B is opened, and the medium-pressure gas source connected to the low-pressure air inlet 17A of the first control cylinder 10A pushes open the check valve 14A of the first control cylinder 10A, and the medium-pressure hydrogen passes through the cylinder barrel 15A of the first control cylinder 10A, the air outlet 18A of the first control cylinder 10A, the high-pressure air inlet 16B of the second control cylinder 10B, and enters the cylinder barrel 15B of the second control cylinder 10B. The check valve 14B of the second control cylinder 10B is closed under the pressure of the medium-pressure hydrogen. The hydrogen entering the cylinder barrel 15B of the second control cylinder 10B outputs the medium-pressure hydrogen from the air outlet 18B of the second control cylinder 10B, the inlet 22 of the hydrogenator 20, and the outlet 23 of the hydrogenator 20.

[0036] High pressure hydrogenation state: Figure 8As shown, when the air pressure at the outlet 23 of the hydrogenator 20 is close to the air supply pressure of the medium-pressure gas source, the air pressure at the outlet 23 of the hydrogenator 20 is applied to the back of the piston 12A of the first control cylinder 10A through the feedback air port 19A of the first control cylinder 10A, and is superimposed with the thrust of the compression spring 13A of the first control cylinder 10A, thereby overcoming the pressure applied by the medium-pressure gas source on the front of the piston 12A of the first control cylinder 10A, and the piston 12A of the first control cylinder 10A moves forward to the extreme position, the high-pressure air inlet 16A of the first control cylinder 10A opens, the high-pressure hydrogen enters the cylinder barrel 15A of the first control cylinder 10A, and the check valve 14A of the first control cylinder 10A is closed. The hydrogen that enters the cylinder barrel 15A of the first control cylinder 10A then enters the cylinder barrel 15B of the second control cylinder 10B from the gas outlet 18A of the first control cylinder 10A and the high-pressure gas inlet 16B of the second control cylinder. The hydrogen that enters the cylinder barrel 15B of the second control cylinder 10B then outputs high-pressure hydrogen from the gas outlet 18B of the second control cylinder 10B, the inlet 22 of the hydrogenation machine 20 and the outlet 23 of the hydrogenation machine 20 until the high-pressure hydrogenation is completed.

[0037] The hydrogenation control device of the above embodiment of the present invention utilizes two control cylinders to automatically switch the hydrogenator from a low-pressure gas source to a high-pressure gas source, thereby solving the problem that the hydrogen storage tank in the hydrogenation station cannot fully utilize the hydrogen in the tank. The hydrogenation control device does not require a complex control system, has a simple equipment structure, low cost, easy processing, and small size. It also has the advantages of easy installation, low leakage rate, and low maintenance cost.

Claims

1. A hydrogenation control device, characterized in that: The invention comprises at least one control cylinder, which comprises a cylinder body and cylinder head assembly, a piston, a compression spring and a check valve. The cylinder body and cylinder head assembly comprises a cylinder barrel, a high-pressure air inlet, a low-pressure air inlet, an air outlet and a feedback air port. The axis of the cylinder barrel is arranged horizontally, the high-pressure air inlet is located in the middle part of the upper part of the cylinder barrel, the air outlet is located in the lower part of the cylinder barrel and is connected with the middle part of the cylinder barrel; the low-pressure air inlet is located at the front end of the cylinder barrel, the check valve is installed at the front end of the cylinder barrel or in the low-pressure air inlet, and the feedback air port is located at the rear end of the cylinder barrel; the front part of the piston comprises a cylindrical guide part, the upper part of the guide part closes the high-pressure air inlet, and the guide part of the piston is slidably matched with the cylinder barrel; the lower wall of the cylindrical guide part comprises an avoidance groove of the air outlet, and the upper wall of the cylindrical guide part comprises an air inlet through hole; when the piston moves forward to the extreme position, the air inlet through hole is connected with the high-pressure air inlet; the compression spring is installed between the rear end face of the compression spring and the rear wall of the cylinder barrel.

2. The hydrogenation control device according to claim 1, characterized in that: It comprises two control cylinders, the high-pressure air inlet of the second control cylinder is connected to the air outlet of the first control cylinder, and the feedback air port of the second control cylinder is connected in parallel with the feedback air port of the first control cylinder.

3. The hydrogenation control device according to claim 2, characterized in that: The high-pressure air inlet of the first control cylinder is connected to a high-pressure gas source, and the low-pressure air inlet of the first control cylinder is connected to a medium-pressure gas source; the low-pressure air inlet of the second control cylinder is connected to a low-pressure gas source, and the air outlet of the second control cylinder is connected to the inlet of the hydrogenator, and the feedback air port of the second control cylinder and the feedback air port of the first control cylinder are connected to the outlet of the hydrogenator.

4. The hydrogenation control device according to claim 1, characterized in that: The cylinder block and cylinder head assembly includes a cylinder block, a front cylinder head and a rear cylinder head. The cylinder barrel, high-pressure air inlet and air outlet are arranged in the cylinder block. The front cylinder head is fixed to the front end of the cylinder block, and the rear cylinder head is fixed to the rear end of the cylinder block; the low-pressure air inlet is arranged on the front cylinder head, and the feedback air port is arranged on the rear cylinder head.

5. The hydrogenation control device according to claim 4, characterized in that: The front cylinder head includes a check valve mounting seat, which extends into the front end of the cylinder barrel, and the check valve is mounted on the check valve mounting seat; the rear cylinder head includes a spring seat, which extends into the rear end of the cylinder barrel, and the compression spring is arranged in the spring seat. When the piston moves backward to the extreme position, the rear end surface of the piston abuts against the spring seat.

6. The hydrogenation control device according to claim 4, characterized in that: It comprises two control cylinders, the cylinder body of the first control cylinder is connected to the cylinder body of the second control cylinder to form a cylinder body assembly, the high-pressure air inlet of the second control cylinder is connected to the air outlet of the first control cylinder; the front cylinder cover of the first control cylinder is connected to the front cylinder cover of the second control cylinder to form a front cylinder cover assembly, and the rear cylinder cover of the first control cylinder is connected to the rear cylinder cover of the second control cylinder to form a rear cylinder cover assembly.

7. The hydrogenation control device according to claim 2, characterized in that: Hydrogenation operations include the following work processes: 701) Initial state: the valve of the hydrogenator is closed, the outlet of the hydrogenator is without pressure, the feedback ports of the two control cylinders are without pressure, the piston of the first control cylinder is at the rear limit position under the action of the medium-pressure gas source, and the guide portion of the piston of the first control cylinder closes the high-pressure air inlet of the first control cylinder; the piston of the second control cylinder is at the rear limit position under the action of the low-pressure gas source, and the guide portion of the piston of the second control cylinder closes the high-pressure air inlet of the second control cylinder; 702) Low-pressure hydrogenation state: the valve of the hydrogenator is opened, and the low-pressure gas source connected to the low-pressure air inlet of the second control cylinder pushes open the check valve of the second control cylinder, and outputs low-pressure hydrogen through the cylinder barrel of the second control cylinder, the air outlet of the second control cylinder, the inlet of the hydrogenator and the outlet of the hydrogenator; 703) Medium-pressure hydrogenation state: When the gas pressure at the outlet of the hydrogenator is close to the gas supply pressure of the low-pressure gas source, the gas pressure at the outlet of the hydrogenator is applied to the back of the piston of the second control cylinder through the feedback gas port of the second control cylinder, and is superimposed with the thrust of the compression spring of the second control cylinder to overcome the pressure applied by the low-pressure gas source on the front of the piston of the second control cylinder. The piston of the second control cylinder moves forward to the limit position, the high-pressure air inlet of the second control cylinder opens, and the medium-pressure air source connected to the low-pressure air inlet of the first control cylinder pushes open the check valve of the first control cylinder. The medium-pressure hydrogen passes through the cylinder barrel of the first control cylinder, the air outlet of the first control cylinder, the high-pressure air inlet of the second control cylinder, and enters the cylinder barrel of the second control cylinder. The check valve of the second control cylinder is closed; the hydrogen entering the cylinder barrel of the second control cylinder outputs medium-pressure hydrogen from the air outlet of the second control cylinder, the inlet of the hydrogenator and the outlet of the hydrogenator; 704) High-pressure hydrogenation state: When the air pressure at the outlet of the hydrogenator is close to the supply pressure of the medium-pressure gas source, the air pressure at the outlet of the hydrogenator is applied to the back of the piston of the first control cylinder through the feedback air port of the first control cylinder, and is superimposed with the thrust of the compression spring of the first control cylinder to overcome the pressure applied by the medium-pressure gas source on the front of the piston of the first control cylinder. The piston of the first control cylinder moves forward to the limit position, the high-pressure air inlet of the first control cylinder opens, and high-pressure hydrogen enters the cylinder barrel of the first control cylinder, and the check valve of the first control cylinder is closed; the hydrogen entering the cylinder barrel of the first control cylinder then enters the cylinder barrel of the second control cylinder from the air outlet of the first control cylinder, and the hydrogen entering the cylinder barrel of the second control cylinder then outputs high-pressure hydrogen from the air outlet of the second control cylinder, the inlet of the hydrogenator and the outlet of the hydrogenator until the high-pressure hydrogenation is completed.

8. The hydrogenation control device according to claim 1, characterized in that: The cylinder is a non-circular cylinder, and the piston is a non-circular piston.

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