A hydrogen production system pipeline network

Abstract

The present invention discloses a pipeline network of a hydrogen production system, which includes an electrolysis tank and a hydrogen storage tank. The electrolysis tank and the hydrogen storage tank are connected by a first connecting pipe, and a first control valve is arranged on the first connecting pipe. One end of the hydrogen storage tank far away from the first connecting pipe is connected with a second connecting pipe, and a second control valve is arranged on the second connecting pipe. The first connecting pipe is connected with a third connecting pipe, and the third connecting pipe is arranged between the hydrogen storage tank and the first control valve. A third control valve is arranged on the third connecting pipe, and the third connecting pipe is connected with a nitrogen cylinder, and a switch valve is arranged at the bottle mouth of the nitrogen cylinder. The first connecting pipe is connected with a first hydrogen discharge pipe, and the first hydrogen discharge pipe is arranged between the first control valve and the hydrogen storage tank. The second connecting pipe is connected with a second hydrogen discharge pipe, and the second hydrogen discharge pipe is arranged between the hydrogen storage tank and the second control valve. One-way valves and fourth control valves are arranged on both the first hydrogen discharge pipe and the second hydrogen discharge pipe. The hydrogen discharge efficiency of the present invention is high.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe networks, and in particular to a pipe network for a hydrogen production system. Background Art

[0002] In order to improve the utilization rate of electric energy, hydrogen energy is currently vigorously developed for energy storage. Specifically, the hydrogen production system uses surplus electric energy to electrolyze alkaline water to produce hydrogen and store it. During peak electricity consumption periods, a hydrogen fuel cell is used to convert the chemical energy of hydrogen into electric energy for power supply.

[0003] Before commissioning, after shutdown, and before maintenance of the existing hydrogen production system, it is necessary to empty the hydrogen in the hydrogen production system. The existing hydrogen production system has a low hydrogen discharge efficiency. Specifically, the current hydrogen production system only has one input port and one hydrogen discharge pipe. When discharging hydrogen, a nitrogen cylinder is connected to the input port. Nitrogen enters the hydrogen production system and is output from the hydrogen discharge pipe together with the hydrogen in the hydrogen production system. By continuously inputting nitrogen, the hydrogen in the hydrogen production system is continuously reduced until the hydrogen concentration is close to zero. In the existing hydrogen discharge method, the flow path of nitrogen in the hydrogen production system is single, and the hydrogen concentration in the area outside the flow path of nitrogen decreases slowly. Summary of the Invention

[0004] In order to solve the disadvantage of low hydrogen discharge efficiency of the existing hydrogen discharge method, the present invention proposes a pipe network for a hydrogen production system with high hydrogen discharge efficiency.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A pipe network for a hydrogen production system includes an electrolysis tank and a hydrogen storage tank. The electrolysis tank and the hydrogen storage tank are connected by a first connecting pipe. A first control valve is provided on the first connecting pipe. One end of the hydrogen storage tank away from the first connecting pipe is connected to a second connecting pipe. A second control valve is provided on the second connecting pipe. The first connecting pipe is connected to a third connecting pipe. The third connecting pipe is provided between the hydrogen storage tank and the first control valve. A third control valve is provided on the third connecting pipe. The third connecting pipe is connected to a nitrogen cylinder. A switch valve is provided at the bottle mouth of the nitrogen cylinder. The first connecting pipe is connected to a first hydrogen discharge pipe. The first hydrogen discharge pipe is provided between the first control valve and the hydrogen storage tank. The second connecting pipe is connected to a second hydrogen discharge pipe. The second hydrogen discharge pipe is provided between the hydrogen storage tank and the second control valve. One-way valves and fourth control valves are provided on both the first hydrogen discharge pipe and the second hydrogen discharge pipe.

[0007] Through the above settings, efficient hydrogen discharge can be achieved. Specifically, during hydrogen production, the first control valve is opened, the second control valve is closed, the third control valve is closed, the switch valve is closed, and the fourth control valve is closed. The electrolytic tank electrolyzes alkaline water to generate hydrogen, and the hydrogen enters the first connecting pipe. A compression pump is provided on the first connecting pipe. Under the action of the compression pump, the pressure of the hydrogen increases and it enters the hydrogen storage tank through the first connecting pipe. When the hydrogen in the hydrogen storage tank needs to be used, the second control valve is opened, and then the hydrogen in the hydrogen storage tank is output through the second connecting pipe for use.

[0008] When hydrogen discharge is required, the electrolytic tank stops electrolyzing alkaline water, the first control valve and the second control valve are closed, and then the fourth control valve is opened. At this time, the hydrogen in the hydrogen storage tank is output from both ends of the hydrogen storage tank. Specifically, a part of the hydrogen is output to the atmosphere through the second connecting pipe and the second hydrogen discharge pipe, and another part of the hydrogen is output to the atmosphere through the first connecting pipe and the first hydrogen discharge pipe. As the hydrogen is released, the pressure in the hydrogen storage tank decreases, and the check valve can prevent external air from entering the hydrogen storage tank through the first hydrogen discharge pipe and the second hydrogen discharge pipe. When the pressure in the hydrogen storage tank decreases to a certain extent, such as when it decreases to two atmospheres, the switch valve of the nitrogen cylinder and the third control valve are opened, and the nitrogen cylinder outputs nitrogen to the first connecting pipe through the third control valve. A part of the nitrogen is output to the atmosphere through the first connecting pipe, the compression pump, and the first hydrogen discharge pipe, and another part of the nitrogen is output to the atmosphere through the first connecting pipe, the hydrogen storage tank, the second connecting pipe, and the second hydrogen discharge pipe, realizing multi-path hydrogen discharge, greatly improving the efficiency of hydrogen discharge, and greatly reducing the dead corners of hydrogen discharge. As the nitrogen is output, the hydrogen content in the first connecting pipe, the hydrogen storage tank, and the second connecting pipe decreases, and finally the hydrogen concentration approaches zero.

[0009] As an implementation method, both the first hydrogen discharge pipe and the second hydrogen discharge pipe extend upward. The lower end of the first hydrogen discharge pipe is connected to the first connecting pipe, and the lower end of the second hydrogen discharge pipe is connected to the second connecting pipe.

[0010] As an implementation method, one end of the third connecting pipe far from the first connecting pipe is connected to the nitrogen cylinder through a connector. The connector includes a main body, and the main body is provided with a connection port, a first output port, and a second output port. The first output port is communicated with the atmosphere, the connection port is threadedly connected to the bottle mouth of the nitrogen cylinder, the second output port is connected to the third connecting pipe, and an air ventilation component is provided in the main body. The air ventilation component includes a first state and a second state. When the air ventilation component is in the first state, the air ventilation component communicates the connection port and the first output port. When the air ventilation component is in the second state, the air ventilation component communicates the connection port and the second output port. The connector further includes a switching device for switching the state of the air ventilation component.

[0011] Through the above settings, the air in the bottle mouth and the connector can be excluded, thereby preventing the oxidation gas in the air from entering the hydrogen storage tank. Specifically, when discharging hydrogen, the ventilation component is first in the first state. After opening the switch valve, the nitrogen cylinder outputs nitrogen to the atmosphere through the connection port, the ventilation component, and the first output port. During this process, the nitrogen discharges the air in the bottle mouth, the connection port, and the ventilation component. Then the ventilation component disconnects the connection port and the first output port, and the ventilation component enters the second state. The nitrogen cylinder outputs nitrogen to the first connecting pipe through the connection port, the ventilation component, the second output port, and the third connecting pipe. A part of the nitrogen is output to the atmosphere through the first connecting pipe, the compression pump, and the first hydrogen discharge pipe, and another part of the nitrogen is output to the atmosphere through the first connecting pipe, the hydrogen storage tank, the second connecting pipe, and the second hydrogen discharge pipe. As the nitrogen is output, the hydrogen content in the first connecting pipe, the hydrogen storage tank, and the second connecting pipe decreases, and finally the hydrogen concentration approaches zero.

[0012] As an implementation manner, a sliding groove is provided in the main body. The connection port, the first output port, and the second output port are all communicated with the sliding groove. The ventilation component includes a valve core slidably connected in the sliding groove. The valve core is provided with an air passage. When the ventilation component is in the first state, the connection port is communicated with the first output port through the air passage. When the ventilation component is in the second state, the connection port is communicated with the second output port through the air passage, and the valve core blocks the first output port.

[0013] Through the above settings, the state of the ventilation component can be changed by the sliding of the valve core in the sliding groove.

[0014] As an implementation manner, the main body extends vertically. The connection port is arranged at the lower end of the main body. The first output port is arranged on one side of the middle part of the main body. The second output port is arranged on one side of the upper end of the main body. The air passage includes an air inlet end and an air outlet end. The air inlet end is arranged on the lower side of the valve core. The air outlet end is arranged on one side of the valve core and is used to communicate with the first output port or the second output port. The first output port extends vertically. The length of the first output port is greater than the width of the air outlet end. The diameter of the second output port is adapted to the width of the air outlet end. When the valve core abuts against the upper end of the sliding groove, the positions of the second output port and the air outlet end correspond.

[0015] With the above settings, the automatic switching between the first state and the second state of the ventilation component can be completed simply by opening the switching valve. Specifically, initially, the air outlet end is located at the lower end of the first outlet, and the switching valve is closed. When hydrogen needs to be discharged, the switching valve and the third control valve are opened. Nitrogen from the nitrogen cylinder is output to the connection port, and the nitrogen in the connection port is discharged to the atmosphere through the air passage and the first outlet. Since the pressure of the hydrogen storage tank has been reduced in advance, the air pressure above the valve core is lower than the air pressure below the valve core. Under the action of the pressure difference, the valve core will move upward. Since the width of the air outlet end is smaller than the length of the first outlet, during the upward movement of the valve core, the air outlet end moves upward along the first outlet, and the air passage remains connected to the first outlet, that is, nitrogen can still be discharged to the atmosphere through the first outlet. During this period, the air in the air passage, the connection port, and the bottle mouth can be discharged, thus preventing this part of the air from being brought into the hydrogen storage tank. As the valve core continues to move upward, the air outlet end moves to the upper side of the first outlet, and the air outlet end is blocked by the main body. At this time, nitrogen cannot be output from the first outlet. Under the action of the air pressure, the valve core continues to move upward and finally abuts against the upper end of the chute, and the air outlet end is connected to the second outlet. Nitrogen passes through the connection port and the air passage and is then output from the second outlet to the first connecting pipe. At this time, the ventilation component is in the second state.

[0016] As an implementation manner, the switching device includes a sliding rod fixedly connected to the upper end of the valve core. The sliding rod passes through the upper end of the main body and is slidably connected to the main body. A first spring is arranged on the upper side of the main body. The first spring is sleeved on the upper end of the sliding rod. One end of the first spring is connected to the sliding rod, and the other end of the first spring is connected to the main body. A connecting device for connecting the valve core is arranged at the upper end of the main body.

[0017] With the above settings, initially, the air outlet end is located at the lower end of the first outlet, and the switching valve is closed. When hydrogen needs to be discharged, the switching valve and the third control valve are opened. Nitrogen from the nitrogen cylinder is output to the connection port. The nitrogen in the connection port is discharged to the atmosphere through the air passage and the first outlet. Since the pressure in the hydrogen storage tank has been reduced in advance, the air pressure above the valve core is lower than the air pressure below the valve core. Under the action of the pressure difference, the valve core and the sliding rod will move upward, and the first spring will elongate. Since the width of the air outlet end is smaller than the length of the first outlet, during the upward movement of the valve core, the air outlet end moves upward along the first outlet, and the air passage remains connected to the first outlet, that is, nitrogen can still be discharged to the atmosphere through the first outlet. During this period, the air in the air passage, the connection port, and the bottle mouth can be discharged, thus preventing this part of the air from being brought into the hydrogen storage tank. As the valve core continues to move upward, the air outlet end moves to the upper side of the first outlet, and the air outlet end is blocked by the main body. At this time, nitrogen cannot be output from the first outlet. Under the action of the air pressure, the valve core continues to move upward and finally abuts against the upper end of the chute. The air outlet end is connected to the second outlet. The connecting device is connected to the valve core. Nitrogen passes through the connection port and the air passage and is output from the second outlet to the first connecting pipe. At this time, the ventilation assembly is in the second state. The air pressure of the nitrogen cylinder overcomes the elastic force of the first spring and presses the valve core against the upper end of the chute. As nitrogen is output, the nitrogen in the nitrogen cylinder decreases, and the air pressure of the nitrogen cylinder decreases. The connecting device can prevent the valve core from moving downward under the action of the elastic force of the first spring, so that nitrogen can always be discharged to the first connecting pipe through the air passage and the second outlet. When the air pressure in the nitrogen cylinder is reduced to a certain extent, at this time, the nitrogen output speed of the nitrogen cylinder decreases, and the hydrogen discharge efficiency decreases. The nitrogen cylinder needs to be replaced in time. At this time, the connecting device is disconnected from the valve core. Under the action of the elastic force of the first spring, the valve core moves downward and is connected to the first outlet. The first spring shortens. At this time, the remaining nitrogen in the nitrogen cylinder is output through the air passage and the first outlet. Since the width of the air outlet end is relatively small, the air flow speed is still relatively fast, with a relatively large air flow sound, which can remind personnel to replace the nitrogen cylinder.

[0018] As an implementation manner, the connecting device includes a first cylinder body fixedly connected to one side of the main body away from the second outlet. A piston is slidably connected in the first cylinder body. A side groove is provided on the side of the main body away from the second outlet. A piston rod is slidably connected in the side groove. The piston rod and the piston are fixedly connected. The side of the piston away from the piston rod is connected to the first cylinder body through a second spring. One end of the first cylinder body away from the main body is connected to a second cylinder body through a pipe. The second cylinder body is fixedly connected to one side of the connection port and is in communication with the connection port. An oil plug is slidably connected in the second cylinder body. The side of the oil plug away from the connection port is connected to the second cylinder body through a third spring. The pipe, the first cylinder body and the second cylinder body are filled with oil. A slot is provided on one side of the valve core. One end of the piston rod away from the piston is provided with an inclined surface facilitating the insertion of the piston rod into the piston. When the piston abuts against the main body, at least part of the piston rod and the inclined surface are arranged in the sliding groove. When the valve core abuts against the upper end of the sliding groove, the positions of the piston rod and the slot correspond to each other.

[0019] Through the above settings, the connection device can be automatically triggered according to the air pressure of the nitrogen cylinder. Specifically, when the switch valve is not opened, the piston does not abut against the end of the first cylinder block, the second spring is basically not deformed, and the piston rod does not enter the chute. When discharging hydrogen, the switch valve is opened, and hydrogen enters the connection port, causing the air pressure in the connection port to increase. Under the action of the air pressure, the second piston moves to the left, the third spring shortens, and under the action of the hydraulic fluid, the second spring elongates, and the piston moves to the right and the right end of the piston rod enters the chute. At this time, nitrogen is discharged to the atmosphere through the connection port, the air passage, and the first outlet. Since the pressure of the hydrogen storage tank has been reduced in advance, the air pressure above the valve core is lower than the air pressure below the valve core. Under the action of the pressure difference, the valve core and the sliding rod will move upward, and the first spring elongates. Since the width of the air outlet end is smaller than the length of the first outlet, during the upward movement of the valve core, the air outlet end moves upward along the first outlet, and the air passage is still connected to the first outlet, that is, nitrogen can still be discharged to the atmosphere through the first outlet. Using this period of time, the air in the air passage, the connection port, and the bottle mouth can be discharged, thereby preventing this part of the air from being brought into the hydrogen storage tank. As the valve core continues to move upward, the air outlet end moves to the upper side of the first outlet, and the air outlet end is blocked by the main body. At this time, nitrogen cannot be output from the first outlet. Under the action of the air pressure, the valve core continues to move upward and finally abuts against the upper end of the chute. During this process, the valve core presses against the inclined surface, causing the piston rod to move to the left, and the second spring shortens. When the valve core abuts against the upper end of the chute, the slot corresponds to the position of the piston rod. Under the action of the second spring, the piston rod is inserted into the slot, the air outlet end is connected to the second outlet, the connection device is connected to the valve core, and nitrogen is output from the second outlet to the first connecting pipe through the connection port and the air passage. At this time, the ventilation component is in the second state, and the air pressure of the nitrogen cylinder overcomes the elastic force of the first spring and presses the valve core tightly against the upper end of the chute. As nitrogen is output, the nitrogen in the nitrogen cylinder decreases, and the air pressure of the nitrogen cylinder decreases. The connection device can prevent the valve core from moving downward under the action of the elastic force of the first spring, so that nitrogen can always be discharged to the first connecting pipe through the air passage and the second outlet.When the air pressure in the nitrogen cylinder drops to a certain level, the nitrogen output speed of the nitrogen cylinder decreases at this time, and the hydrogen discharge efficiency decreases. It is necessary to replace the nitrogen cylinder in time. Since the air pressure in the connection port is small at this time, under the action of the third spring, the oil plug moves to the right against the air pressure. Under the action of the oil, the piston moves to the left, the second spring shortens, and the piston rod disengages from the slot. Under the action of the elastic force of the first spring, the valve core moves downward and communicates with the first output port, and the first spring shortens. At this time, the remaining nitrogen in the nitrogen cylinder is output through the air passage and the first output port. Since the width of the air outlet end is relatively small, the air flow speed is still relatively fast, with a relatively large air flow sound, which can remind the personnel to replace the nitrogen cylinder. When replacing the nitrogen cylinder, when the nitrogen cylinder is removed from the connection port, the air pressure on the lower side of the valve core is one atmospheric pressure, and the air pressure on the upper side of the valve core is greater than that on the lower side of the valve core. Under the action of the pressure difference, the valve core abuts against the lower end of the chute, and the ventilation component returns to the first state. Then, thread the new nitrogen cylinder to the connection port, and the above steps can be repeated to discharge hydrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the embodiment.

[0021] Figure 2 is Figure 1 partial enlarged view of

[0022] Figure 3 Schematic diagram after the switch valve is opened.

[0023] Figure 4 Schematic diagram of the valve core moving upward.

[0024] Figure 5 Schematic diagram of nitrogen output from the second output port.

[0025] Figure 6 Schematic diagram of hydrogen discharge.

[0026] Figure 7 Schematic diagram after the piston rod disengages from the slot. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The technical solutions of the present invention will be further specifically described below through embodiments in conjunction with the drawings.

[0028] See Figures 1 to 7, a hydrogen production system pipeline network, including an electrolysis tank 11 and a hydrogen storage tank 12. The electrolysis tank 11 and the hydrogen storage tank 12 are connected by a first connecting pipe 13. A first control valve 131 is provided on the first connecting pipe 13. One end of the hydrogen storage tank 12 away from the first connecting pipe 13 is connected with a second connecting pipe 121. A second control valve 122 is provided on the second connecting pipe 121. The first connecting pipe 13 is connected with a third connecting pipe 132. The third connecting pipe 132 is arranged between the hydrogen storage tank 12 and the first control valve 131. A third control valve 1321 is provided on the third connecting pipe 132. The third connecting pipe 132 is connected with a nitrogen cylinder 1322. A switch valve 13221 is provided at the bottle mouth of the nitrogen cylinder 1322. The first connecting pipe 13 is connected with a first hydrogen discharge pipe 14. The first hydrogen discharge pipe 14 is arranged between the first control valve 131 and the hydrogen storage tank 12. The second connecting pipe 121 is connected with a second hydrogen discharge pipe 15. The second hydrogen discharge pipe 15 is arranged between the hydrogen storage tank 12 and the second control valve 122. Check valves 151 and fourth control valves 152 are provided on both the first hydrogen discharge pipe 14 and the second hydrogen discharge pipe 15.

[0029] Through the above settings, efficient hydrogen discharge can be achieved. Specifically, during hydrogen production, the first control valve 131 is opened, the second control valve 122 is closed, the third control valve 1321 is closed, the switch valve 13221 is closed, and the fourth control valve 152 is closed. The electrolysis tank 11 electrolyzes alkaline water to generate hydrogen. The hydrogen enters the first connecting pipe 13. A compression pump is provided on the first connecting pipe 13. Under the action of the compression pump, the pressure of the hydrogen increases and the hydrogen enters the hydrogen storage tank 12 through the first connecting pipe 13. See Figure 1 , when it is necessary to use the hydrogen in the hydrogen storage tank 12, open the second control valve 122, and then the hydrogen in the hydrogen storage tank 12 is output through the second connecting pipe 121 for use.

[0030] When hydrogen discharge is required, the electrolysis tank 11 stops electrolyzing alkaline water, the first control valve 131 and the second control valve 122 are closed, and then the fourth control valve 152 is opened. At this time, the hydrogen in the hydrogen storage tank 12 is output from both ends of the hydrogen storage tank 12. Specifically, a part of the hydrogen passes through the second connecting pipe 121 and the second hydrogen discharge pipe 15 and is output to the atmosphere, and another part of the hydrogen passes through the first connecting pipe 13 and the first hydrogen discharge pipe 14 and is output to the atmosphere. As the hydrogen is released, the pressure in the hydrogen storage tank 12 decreases, and the check valve 151 can prevent external air from entering the hydrogen storage tank 12 through the first hydrogen discharge pipe 14 and the second hydrogen discharge pipe 15. When the pressure in the hydrogen storage tank 12 decreases to a certain extent, such as when it decreases to two atmospheres, the switch valve 13221 of the nitrogen cylinder 1322 and the third control valve 1321 are opened. The nitrogen cylinder 1322 outputs nitrogen to the first connecting pipe 13 through the third control valve 1321. A part of the nitrogen passes through the first connecting pipe 13, the compression pump, and the first hydrogen discharge pipe 14 and is output to the atmosphere, and another part of the nitrogen passes through the first connecting pipe 13, the hydrogen storage tank 12, the second connecting pipe 121, and the second hydrogen discharge pipe 15 and is output to the atmosphere. As the nitrogen is output, the hydrogen content in the first connecting pipe 13, the hydrogen storage tank 12, and the second connecting pipe 121 decreases, and finally the hydrogen concentration approaches zero. See Figure 6 。

[0031] As an implementation manner, both the first hydrogen discharge pipe 14 and the second hydrogen discharge pipe 15 extend upward. The lower end of the first hydrogen discharge pipe 14 is connected to the first connecting pipe 13, and the lower end of the second hydrogen discharge pipe 15 is connected to the second connecting pipe 121.

[0032] As an implementation manner, one end of the third connecting pipe 132 far from the first connecting pipe 13 is connected to the nitrogen cylinder 1322 through a connector 16. The connector 16 includes a main body 161. The main body 161 is provided with a connection port 1611, a first output port 1612, and a second output port 1613. The first output port 1612 is communicated with the atmosphere. The connection port 1611 is threadedly connected to the bottle mouth of the nitrogen cylinder 1322. The second output port 1613 is connected to the third connecting pipe 132. An air vent assembly 162 is arranged in the main body 161. The air vent assembly 162 includes a first state and a second state. When the air vent assembly 162 is in the first state, the air vent assembly 162 communicates the connection port 1611 and the first output port 1612. When the air vent assembly 162 is in the second state, the air vent assembly 162 communicates the connection port 1611 and the second output port 1613. The connector 16 further includes a switching device 163 for switching the state of the air vent assembly 162.

[0033] Through the above settings, the air in the bottle mouth and the connector 16 can be excluded, thereby preventing the oxidation gas in the air from entering the hydrogen storage tank 12. Specifically, when discharging hydrogen, the ventilation component 162 is first in the first state. After opening the switch valve 13221, the nitrogen cylinder 1322 outputs nitrogen to the atmosphere through the connection port 1611, the ventilation component 162, and the first output port 1612. During this process, the nitrogen discharges the air in the bottle mouth, the connection port 1611, and the ventilation component 162. Then, the ventilation component 162 disconnects the connection port 1611 and the first output port 1612, and the ventilation component 162 enters the second state. The nitrogen cylinder 1322 outputs nitrogen to the first connection pipe 13 through the connection port 1611, the ventilation component 162, the second output port 1613, and the third connection pipe 132. A part of the nitrogen is output to the atmosphere through the first connection pipe 13, the compression pump, and the first hydrogen discharge pipe 14, and another part of the nitrogen is output to the atmosphere through the first connection pipe 13, the hydrogen storage tank 12, the second connection pipe 121, and the second hydrogen discharge pipe 15. As the nitrogen is output, the hydrogen content in the first connection pipe 13, the hydrogen storage tank 12, and the second connection pipe 121 decreases, and finally the hydrogen concentration approaches zero. See Figure 6 。

[0034] As an implementation method, a sliding groove 1614 is provided in the main body 161. The connection port 1611, the first output port 1612, and the second output port 1613 are all communicated with the sliding groove 1614. The ventilation component 162 includes a valve core 1621 slidably connected in the sliding groove 1614. The valve core 1621 is provided with an air passage 16211. When the ventilation component 162 is in the first state, the connection port 1611 is communicated with the first output port 1612 through the air passage 16211. When the ventilation component 162 is in the second state, the connection port 1611 is communicated with the second output port 1613 through the air passage 16211, and the valve core 1621 blocks the first output port 1612.

[0035] Through the above settings, the state of the ventilation component 162 can be changed by the sliding of the valve core 1621 in the sliding groove 1614.

[0036] As an implementation, the main body 161 extends vertically. The connection port 1611 is provided at the lower end of the main body 161. The first output port 1612 is provided on one side of the middle part of the main body 161. The second output port 1613 is provided on one side of the upper end of the main body 161. The air passage 16211 includes an air inlet end 16212 and an air outlet end 16213. The air inlet end 16212 is provided on the lower side of the valve core 1621. The air outlet end 16213 is provided on one side of the valve core 1621 and is used to communicate with the first output port 1612 or the second output port 1613. The first output port 1612 extends vertically. The length of the first output port 1612 is greater than the width of the air outlet end 16213. The diameter of the second output port 1613 is adapted to the width of the air outlet end 16213. When the valve core 1621 abuts against the upper end of the sliding groove 1614, the positions of the second output port 1613 and the air outlet end 16213 correspond.

[0037] With the above settings, as long as the switch valve 13221 is opened, the automatic switching between the first state and the second state of the ventilation assembly 162 can be completed. Specifically, initially, the air outlet end 16213 is located at the lower end of the first output port 1612. Refer to Figure 2 , the switch valve 13221 is closed. When hydrogen needs to be discharged, the switch valve 13221 and the third control valve 1321 are opened. The nitrogen cylinder 1322 outputs nitrogen to the connection port 1611. The nitrogen in the connection port 1611 is discharged to the atmosphere through the air passage 16211 and the first output port 1612. Since the pressure of the hydrogen storage tank 12 has been reduced in advance, the air pressure on the upper side of the valve core 1621 is lower than the air pressure on the lower side of the valve core 1621. Under the action of the air pressure difference, the valve core 1621 will move upward. Refer to Figure 3 , since the width of the air outlet end 16213 is smaller than the length of the first output port 1612, during the upward movement of the valve core 1621, the air outlet end 16213 moves upward along the first output port 1612, and the air passage 16211 is still in communication with the first output port 1612, that is, nitrogen can still be discharged to the atmosphere through the first output port 1612. During this period, the air in the air passage 16211, the connection port 1611 and the bottle mouth can be discharged, so as to prevent this part of the air from being brought into the hydrogen storage tank 12. As the valve core 1621 continues to move upward, the air outlet end 16213 moves to the upper side of the first output port 1612, and the air outlet end 16213 is blocked by the main body 161. Refer to Figure 4 , at this time, nitrogen cannot be output from the first output port 1612. Under the action of the air pressure, the valve core 1621 continues to move upward and finally abuts against the upper end of the sliding groove 1614. Refer to Figure 5 , the air outlet end 16213 is in communication with the second output port 1613, and nitrogen is output to the first connecting pipe 13 through the connection port 1611 and the air passage 16211. At this time, the ventilation assembly 162 is in the second state.

[0038] As an implementation, the switching device 163 includes a sliding rod 1631 fixedly connected to the upper end of the valve core 1621. The sliding rod 1631 passes through the upper end of the main body 161 and is slidably connected to the main body 161. A first spring 1632 is arranged on the upper side of the main body 161. The first spring 1632 is sleeved on the upper end of the sliding rod 1631. One end of the first spring 1632 is connected to the sliding rod 1631, and the other end of the first spring 1632 is connected to the main body 161. A connecting device 1633 for connecting the valve core 1621 is arranged at the upper end of the main body 161.

[0039] With the above arrangement, initially, the air outlet end 16213 is located at the lower end of the first outlet 1612. Refer to Figure 2 , the switching valve 13221 is closed. When hydrogen needs to be discharged, the switching valve 13221 and the third control valve 1321 are opened. The nitrogen cylinder 1322 outputs nitrogen to the connection port 1611. The nitrogen in the connection port 1611 is discharged to the atmosphere through the air passage 16211 and the first outlet 1612. Since the pressure of the hydrogen storage tank 12 has been reduced in advance, the air pressure above the valve core 1621 is lower than the air pressure below the valve core 1621. Under the action of the pressure difference, the valve core 1621 and the sliding rod 1631 will move upward, and the first spring 1632 will elongate. Refer to Figure 3 , since the width of the air outlet end 16213 is smaller than the length of the first outlet 1612, during the upward movement of the valve core 1621, the air outlet end 16213 moves upward along the first outlet 1612, and the air passage 16211 is still in communication with the first outlet 1612, that is, nitrogen can still be discharged to the atmosphere through the first outlet 1612. During this period, the air in the air passage 16211, the connection port 1611 and the bottle mouth can be discharged, so as to prevent this part of the air from being brought into the hydrogen storage tank 12. As the valve core 1621 continues to move upward, the air outlet end 16213 moves to the upper side of the first outlet 1612, and the air outlet end 16213 is blocked by the main body 161. Refer to Figure 4 , at this time, nitrogen cannot be output from the first outlet 1612. Under the action of the air pressure, the valve core 1621 continues to move upward and finally abuts against the upper end of the sliding groove 1614. Refer to Figure 5, the air outlet 16213 is in communication with the second outlet 1613, the connecting device 1633 is connected to the valve core 1621, and nitrogen passes through the connection port 1611 and the air passage 16211 and then is output from the second outlet 1613 to the first connecting pipe 13. At this time, the ventilation assembly 162 is in the second state, and the air pressure in the nitrogen cylinder 1322 overcomes the elastic force of the first spring 1632 to press the valve core 1621 tightly against the upper end of the sliding groove 1614. As the nitrogen is output, the nitrogen in the nitrogen cylinder 1322 decreases, and the air pressure in the nitrogen cylinder 1322 decreases. The connecting device 1633 can prevent the valve core 1621 from moving downward under the action of the elastic force of the first spring 1632, so that nitrogen can always be discharged to the first connecting pipe 13 through the air passage 16211 and the second outlet 1613. When the air pressure in the nitrogen cylinder 1322 drops to a certain level, at this time, the nitrogen output speed of the nitrogen cylinder 1322 decreases, and the hydrogen discharge efficiency decreases. It is necessary to replace the nitrogen cylinder 1322 in time. At this time, the connecting device 1633 is disengaged from the valve core 1621. Under the action of the elastic force of the first spring 1632, the valve core 1621 moves downward and is in communication with the first outlet 1612. The first spring 1632 shortens. At this time, the remaining nitrogen in the nitrogen cylinder 1322 is output through the air passage 16211 and the first outlet 1612. Since the width of the air outlet 16213 is relatively small, the air flow speed is still relatively fast, with a relatively large air flow sound, which can remind the personnel to replace the nitrogen cylinder 1322.

[0040] As an implementation, the connecting device 1633 includes a first cylinder block 16331 fixedly connected to one side of the main body 161 away from the second outlet 1613. A piston 16332 is slidably connected inside the first cylinder block 16331. A side groove 1615 is provided on one side of the main body 161 away from the second outlet 1613. A piston rod 16333 is slidably connected inside the side groove 1615. The piston rod 16333 and the piston 16332 are fixedly connected. One side of the piston 16332 away from the piston rod 16333 is connected to the first cylinder block 16331 through a second spring 16334. One end of the first cylinder block 16331 away from the main body 161 is connected to a second cylinder block 16336 through a pipe 16335. The second cylinder block 16336 is fixedly connected to one side of the connection port 1611 and is in communication with the connection port 1611. An oil plug 16337 is slidably connected inside the second cylinder block 16336. One side of the oil plug 16337 away from the connection port 1611 is connected to the second cylinder block 16336 through a third spring 16338. The pipe 16335, the first cylinder block 16331 and the second cylinder block 16336 are filled with oil. A slot 16214 is provided on one side of the valve core 1621. One end of the piston rod 16333 away from the piston 16332 is provided with an inclined surface 16339 facilitating the insertion of the piston rod 16333 into the piston 16332. When the piston 16332 abuts against the main body 161, at least part of the piston rod 16333 and the inclined surface 16339 are arranged inside the sliding groove 1614. When the valve core 1621 abuts against the upper end of the sliding groove 1614, the positions of the piston rod 16333 and the slot 16214 correspond to each other.

[0041] With the above settings, the connecting device 1633 can be automatically triggered according to the air pressure of the nitrogen cylinder 1322. Specifically, when the switch valve 13221 is not opened yet, the piston 16332 does not abut against the end of the first cylinder block 16331, the second spring 16334 is basically not deformed, and the piston rod 16333 does not enter the sliding groove 1614. Refer to Figure 2 , when discharging hydrogen, the switch valve 13221 is opened, hydrogen enters the connection port 1611, making the air pressure inside the connection port 1611 increase. Under the action of the air pressure, the second piston 16332 moves to the left, the third spring 16338 shortens. Under the action of the oil, the second spring 16334 elongates, and the piston 16332 moves to the right and the right end of the piston rod 16333 enters the sliding groove 1614. Refer to Figure 3 , at this time, nitrogen is discharged to the atmosphere through the connection port 1611, the air passage 16211, and the first outlet 1612. Since the pressure of the hydrogen storage tank 12 has been reduced in advance, the air pressure on the upper side of the valve core 1621 is lower than the air pressure on the lower side of the valve core 1621. Under the action of the air pressure difference, the valve core 1621 and the sliding rod 1631 will move upward, and the first spring 1632 elongates. Refer to Figure 3, since the width of the air outlet end 16213 is smaller than the length of the first outlet 1612, during the upward movement of the valve core 1621, the air outlet end 16213 moves upward along the first outlet 1612, and the air passage 16211 remains in communication with the first outlet 1612. That is, nitrogen can still be discharged to the atmosphere through the first outlet 1612. During this period, the air in the air passage 16211, the connection port 1611, and the bottle mouth can be discharged, thus preventing this part of the air from being brought into the hydrogen storage tank 12. As the valve core 1621 continues to move upward, the air outlet end 16213 moves to the upper side of the first outlet 1612, and the air outlet end 16213 is blocked by the main body 161. See Figure 4 , at this time, nitrogen cannot be output from the first outlet 1612. Under the action of the air pressure, the valve core 1621 continues to move upward and finally abuts against the upper end of the sliding groove 1614. During this process, the valve core 1621 presses against the extrusion inclined surface 16339, causing the piston rod 16333 to move leftward, and the second spring 16334 shortens. When the valve core 1621 abuts against the upper end of the sliding groove 1614, the slot 16214 and the piston rod 16333 are in corresponding positions. Under the action of the second spring 16334, the piston rod 16333 is inserted into the slot 16214. See Figure 5 , the air outlet end 16213 is in communication with the second outlet 1613, the connecting device 1633 is connected to the valve core 1621, and nitrogen is output from the second outlet 1613 to the first connecting pipe 13 after passing through the connection port 1611 and the air passage 16211. At this time, the ventilation assembly 162 is in the second state. The air pressure in the nitrogen cylinder 1322 overcomes the elastic force of the first spring 1632 and presses the valve core 1621 tightly against the upper end of the sliding groove 1614. As nitrogen is output, the nitrogen in the nitrogen cylinder 1322 decreases, and the air pressure in the nitrogen cylinder 1322 decreases. The connecting device 1633 can prevent the valve core 1621 from moving downward under the action of the elastic force of the first spring 1632, so that nitrogen can always be discharged to the first connecting pipe 13 through the air passage 16211 and the second outlet 1613. When the air pressure in the nitrogen cylinder 1322 decreases to a certain extent, at this time, the nitrogen output speed of the nitrogen cylinder 1322 decreases, and the hydrogen discharge efficiency decreases. It is necessary to replace the nitrogen cylinder 1322 in time. Since the air pressure in the connection port 1611 is small at this time, under the action of the third spring 16338, the oil plug 16337 moves rightward against the air pressure. Under the action of the oil, the piston 16332 moves leftward, and the second spring 16334 shortens. The piston rod 16333 and the slot 16214 are disengaged. See Figure 7, under the action of the elastic force of the first spring 1632, the valve core 1621 moves downward and communicates with the first output port 1612, and the first spring 1632 shortens. At this time, the remaining nitrogen in the nitrogen cylinder 1322 is output through the air passage 16211 and the first output port 1612. Since the width of the air outlet end 16213 is relatively small, the flow velocity of the air flow is still relatively fast, and there is a relatively large air flow sound, which can remind the personnel to replace the nitrogen cylinder 1322. When replacing the nitrogen cylinder 1322, when the nitrogen cylinder 1322 is removed from the connection port, the air pressure on the lower side of the valve core is one atmosphere, and the air pressure on the upper side of the valve core is greater than the air pressure on the lower side of the valve core. Under the action of the pressure difference, the valve core abuts against the lower end of the sliding groove, and the ventilation assembly 162 returns to the first state. Then, thread the new nitrogen cylinder 1322 onto the connection port, and the above steps can be repeated to discharge hydrogen.

[0042] It should be understood that for those of ordinary skill in the art, improvements or changes can be made according to the above description, and all such improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims

1. A hydrogen production system pipeline network, characterized in that, It includes an electrolysis tank and a hydrogen storage tank. The electrolysis tank and the hydrogen storage tank are connected by a first connecting pipe. A first control valve is provided on the first connecting pipe. One end of the hydrogen storage tank away from the first connecting pipe is connected to a second connecting pipe. A second control valve is provided on the second connecting pipe. The first connecting pipe is connected to a third connecting pipe. The third connecting pipe is arranged between the hydrogen storage tank and the first control valve. A third control valve is provided on the third connecting pipe. The third connecting pipe is connected to a nitrogen cylinder. A switch valve is provided at the mouth of the nitrogen cylinder. The first connecting pipe is connected to a first hydrogen discharge pipe. The first hydrogen discharge pipe is arranged between the first control valve and the hydrogen storage tank. The second connecting pipe is connected to a second hydrogen discharge pipe. The second hydrogen discharge pipe is arranged between the hydrogen storage tank and the second control valve. One-way valves and fourth control valves are provided on both the first hydrogen discharge pipe and the second hydrogen discharge pipe. One end of the third connecting pipe away from the first connecting pipe is connected to the nitrogen cylinder through a connector. The connector includes a main body. The main body is provided with a connection port, a first output port, and a second output port. The first output port communicates with the atmosphere. The connection port is threadedly connected to the mouth of the nitrogen cylinder. The second output port is connected to the third connecting pipe. An air venting assembly is arranged inside the main body. The air venting assembly includes a first state and a second state. When the air venting assembly is in the first state, the air venting assembly connects the connection port and the first output port. When the air venting assembly is in the second state, the air venting assembly connects the connection port and the second output port. The connector further includes a switching device for switching the state of the air venting assembly. A sliding groove is arranged inside the main body. The connection port, the first output port, and the second output port all communicate with the sliding groove. The air venting assembly includes a valve core slidably connected in the sliding groove. The valve core is provided with an air passage. The switching device includes a sliding rod fixedly connected to the upper end of the valve core. The sliding rod passes through the upper end of the main body and is slidably connected to the main body. A first spring is arranged on the upper side of the main body. The first spring is sleeved on the upper end of the sliding rod. One end of the first spring is connected to the sliding rod, and the other end of the first spring is connected to the main body. A connecting device for connecting the valve core is arranged at the upper end of the main body. The connecting device includes a first cylinder fixedly connected to one side of the main body away from the second output port. A piston is slidably connected inside the first cylinder. A side groove is arranged on one side of the main body away from the second output port. A piston rod is slidably connected in the side groove. The piston rod is fixedly connected to the piston. One side of the piston away from the piston rod is connected to the first cylinder through a second spring. One end of the first cylinder away from the main body is connected to a second cylinder through a pipe. The second cylinder is fixedly connected to one side of the connection port and communicates with the connection port. An oil plug is slidably connected inside the second cylinder. One side of the oil plug away from the connection port is connected to the second cylinder through a third spring.The pipe, the first cylinder block, and the second cylinder block are provided with hydraulic fluid. A slot is provided on one side of the valve core. One end of the piston rod away from the piston is provided with an inclined surface facilitating the insertion of the piston rod into the piston. When the piston abuts against the main body, at least a part of the piston rod and the inclined surface are arranged in the chute. When the valve core abuts against the upper end of the chute, the positions of the piston rod and the slot correspond.

2. The hydrogen production system pipeline network according to claim 1, wherein Both the first hydrogen discharge pipe and the second hydrogen discharge pipe extend upward. The lower end of the first hydrogen discharge pipe is connected to the first connecting pipe, and the lower end of the second hydrogen discharge pipe is connected to the second connecting pipe.

3. A hydrogen production system pipeline network according to claim 1, characterized in that, When the ventilation assembly is in the first state, the connection port communicates with the first output port through the air passage. When the ventilation assembly is in the second state, the connection port communicates with the second output port through the air passage, and the valve core blocks the first output port.

4. A hydrogen production system pipeline network according to claim 3, characterized in that, The main body extends vertically. The connection port is arranged at the lower end of the main body. The first output port is arranged on one side of the middle part of the main body. The second output port is arranged on one side of the upper end of the main body. The air passage includes an air inlet end and an air outlet end. The air inlet end is arranged below the valve core. The air outlet end is arranged on one side of the valve core and is used to communicate with the first output port or the second output port. The first output port extends vertically. The length of the first output port is greater than the width of the air outlet end. The diameter of the second output port is adapted to the width of the air outlet end. When the valve core abuts against the upper end of the sliding groove, the positions of the second output port and the air outlet end correspond.

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