Air purging device

Abstract

The utility model discloses a gas purging device, relates to the technical field of hydrogen refueling machines, and improves the problem that if gas purging cannot be performed on a pipeline or a combustion battery in time after hydrogen refueling is performed on a combustion battery automobile or a steamship in a hydrogen refueling station, residual water in the pipeline or the combustion battery cannot be discharged out of the pipeline or the combustion battery. The problems that internal water freezes in a flow channel or a gas diffusion layer at a low temperature, so that gas is blocked to reach a catalyst layer to participate in electrochemical reaction during low-temperature starting, electricity cannot be generated, and a surge flask group is influenced are solved, and the device comprises a nitrogen box body and a control panel fixedly installed on the top end face of the nitrogen box body; first air blowing valves are arranged on the two sides of the surface of the control panel, second air blowing valves are connected to the lower portions of the first air blowing valves, and a waste gas blowing membrane is connected to one side of one set of second air blowing valves. The device is easy to install through modular design, and the waste gas purging membrane and the gas inlet membrane valve are arranged on the two sides of the nitrogen box body, so that the device is easy to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen filling machines, in particular to a purging gas device. Background Technique

[0002] A hydrogen filling station is a gas station that provides hydrogen for fuel cell vehicles. As the infrastructure for providing hydrogen for fuel cell vehicles, the number of hydrogen filling stations is also increasing continuously. Various demonstration activities are being carried out enthusiastically all over the world. The construction and demonstration operation activities of these hydrogen filling stations have accumulated a large amount of data and experience for the future. A hydrogen filling station includes a hydrogen production system and a hydrogen filling system.

[0003] After hydrogen is filled into a fuel cell vehicle or a ship at a hydrogen filling station, if the purging gas device is not used to purge the pipeline or the fuel cell in time, it will cause residual water inside the pipeline or the fuel cell, and the internal water will freeze in the flow channel or the gas diffusion layer under low-temperature conditions, resulting in the blockage of gas reaching the catalytic layer to participate in the electrochemical reaction during low-temperature startup, causing power generation failure and affecting the buffer bottle group. Therefore, a purging gas device is proposed now. Content of the Utility Model

[0004] In order to solve the problem that after hydrogen is filled into a fuel cell vehicle or a ship at a hydrogen filling station, if the pipeline or the fuel cell cannot be purged with gas in time, it will cause residual water inside the pipeline or the fuel cell, and the internal water will freeze in the flow channel or the gas diffusion layer under low-temperature conditions, resulting in the blockage of gas reaching the catalytic layer to participate in the electrochemical reaction during low-temperature startup, causing power generation failure and affecting the buffer bottle group, the utility model provides a purging gas device.

[0005] The utility model provides a purging gas device, adopting the following technical scheme: The purging gas device includes a nitrogen gas box body, and a control panel is fixedly installed on the top surface of the nitrogen gas box body;

[0006] On both sides of the surface of the control panel, first blowing valves are arranged. A second blowing valve is connected below the first blowing valve. One side of one group of the second blowing valves is connected with an exhaust gas purging diaphragm, and one side of the other group of the second blowing valves is connected with an intake air diaphragm valve;

[0007] One side of the intake valve is connected with a manifold. The other side of the manifold is connected with the exhaust gas purging diaphragm. A first pressure transmitter is connected in the middle of the manifold, and the other end of the first pressure transmitter is fixedly connected with a discharge port, and the discharge port is arranged on the manifold.

[0008] By adopting the above technical solution, the effect of easy installation is achieved through the modular design at the control panel, and the exhaust gas purge diaphragm and the intake diaphragm valve are configured on both sides of the nitrogen gas box body, which is easy to operate. By setting the first pressure transmitter and the discharge port at the manifold, the pressure signal can be collected and monitored in real time, and early warnings can be given in case of abnormal conditions.

[0009] As a further solution of the present utility model: a first connecting pipe is provided at the connection between the first blowing valve and the second blowing valve. One end of the first connecting pipe is connected to the first blowing valve, and the other end is connected to the second blowing valve.

[0010] By adopting the above technical solution, the first connecting pipe facilitates the connection between the first blowing valve and the second blowing valve, and realizes the communication structure between the two.

[0011] As a further solution of the present utility model: second connecting pipes are provided at the connections between the second blowing valve and the exhaust gas purge diaphragm and the intake diaphragm valve respectively. One end of each second connecting pipe is connected to the second blowing valve, and the other end is connected to the exhaust gas purge diaphragm and the intake diaphragm valve.

[0012] By adopting the above technical solution, the second connecting pipes facilitate the connection between the second blowing valve and the exhaust gas purge diaphragm and the intake diaphragm valve respectively.

[0013] As a further solution of the present utility model: the control panel is made of stainless steel 316L.

[0014] By adopting the above technical solution, 316L is a low-carbon version of 316 stainless steel. It will not precipitate due to carbides at the grain boundaries, that is, it is not affected by sensitization. Therefore, it is widely used in welded parts with a thickness greater than 0.2 inches, and 316L has a wide application in the chemical industry due to its excellent corrosion resistance.

[0015] As a further solution of the present utility model: second pressure transmitters are connected to the rear ends of the exhaust gas purge diaphragm and the intake diaphragm valve respectively.

[0016] By adopting the above technical solution, the second pressure transmitters can monitor the pressure of the exhaust gas purge diaphragm and the intake diaphragm valve in real time, and can give an alarm in time in case of abnormal conditions.

[0017] As a further solution of the present utility model: the manifold and the discharge port are both made of stainless steel 316L.

[0018] By adopting the above technical solution, 316L is a low-carbon version of 316 stainless steel. It will not precipitate due to carbides at the grain boundaries, that is, it is not affected by sensitization. Therefore, it is widely used in welded parts with a thickness greater than 0.2 inches, and 316L has a wide application in the chemical industry due to its excellent corrosion resistance.

[0019] As a further solution of the present utility model: the control panel is a large-flow double-sided automatic switching pressure panel.

[0020] By adopting the above technical solution, the control panel can facilitate the use of the overall structure.

[0021] In summary, the present utility model has the following beneficial effects:

[0022] The present utility model realizes the effect of simple installation through the modular design at the control panel, and is equipped with an exhaust gas purge diaphragm and an intake diaphragm valve on both sides of the nitrogen gas box for simple operation. By setting a first pressure transmitter and a discharge port at the manifold, real-time acquisition and monitoring of pressure signals are achieved, and early warning of abnormal conditions is given in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the present utility model.

[0024] Figure 2 is a schematic structural diagram of the front of the present utility model.

[0025] Figure 3 is a schematic structural diagram of the side of the present utility model.

[0026] Description of the reference numerals:

[0027] 1. Nitrogen gas box; 2. Control panel; 3. First blowing valve; 4. Second blowing valve; 5. Exhaust gas purge diaphragm; 6. Intake diaphragm valve; 7. Manifold; 8. First pressure transmitter; 9. Discharge port; 10. First connecting pipe; 11. Second connecting pipe; 12. Second pressure transmitter. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following further details the present application Figures 1-3 with reference to the attached drawings.

[0029] Please refer to Figure 1 , Figure 2 and Figure 3 , the purge gas device includes a nitrogen gas box 1, and a control panel 2 is fixedly installed on the top surface of the nitrogen gas box 1.

[0030] Among them, first blowing valves 3 are arranged on both sides of the surface of the control panel 2, a second blowing valve 4 is connected below the first blowing valve 3, an exhaust gas purge diaphragm 5 is connected to one side of one group of second blowing valves 4, and an intake diaphragm valve 6 is connected to one side of the other group of second blowing valves 4.

[0031] Meanwhile, one side of the intake diaphragm valve 6 is connected to a manifold pipe 7. The other side of the manifold pipe 7 is connected to the exhaust gas purge diaphragm 5. A first pressure transmitter 8 is connected in the middle of the manifold pipe 7, and the other end of the first pressure transmitter 8 is fixedly connected to a discharge port 9. The discharge port 9 is arranged on the manifold pipe 7. The modular design at the control panel 2 achieves the effect of easy installation. And the exhaust gas purge diaphragm 5 and the intake diaphragm valve 6 are arranged on both sides of the nitrogen gas box 1 for easy operation. By arranging the first pressure transmitter 8 and the discharge port 9 at the manifold pipe 7, real-time acquisition and monitoring of pressure signals are realized, and early warning can be given in case of abnormal conditions.

[0032] In addition, a first connecting pipe 10 is arranged at the connection of the first blowing valve 3 and the second blowing valve 4. One end of the first connecting pipe 10 is connected to the first blowing valve 3, and the other end is connected to the second blowing valve 4. Second connecting pipes 11 are arranged at the connections of the second blowing valve 4 with the exhaust gas purge diaphragm 5 and the intake diaphragm valve 6. One end of each second connecting pipe 11 is connected to the second blowing valve 4, and the other end is connected to the exhaust gas purge diaphragm 5 and the intake diaphragm valve 6.

[0033] Among them, the control panel 2 is made of stainless steel 316L. 316L is a low-carbon version of 316 stainless steel. It will not precipitate due to carbides at the grain boundaries, that is, it is not affected by sensitization. Therefore, it is widely used in welded parts with a thickness greater than 0.2 inches. And 316L has a wide application in the chemical industry due to its excellent corrosion resistance. In addition, second pressure transmitters 12 are connected to the rear ends of both the exhaust gas purge diaphragm 5 and the intake diaphragm valve 6. The manifold pipe 7 and the discharge port 9 are both made of stainless steel 316L. The control panel 2 is a large-flow double-sided automatic switching pressure panel, which is convenient for the use of the overall structure.

[0034] The implementation principle of the present utility model is as follows: First, after the hydrogen filling machine fills the fuel cell vehicle, the purging gas device is opened. The large-flow double-sided automatic switching pressure panel of the device controls the first blowing valve 3 to blow the nitrogen gas inside the nitrogen gas box 1 towards the second blowing valve 4 through the first connecting pipe 10, and uses the second blowing valve 4 and the second connecting pipe 11 to blow these nitrogen gases into the exhaust gas purging diaphragm 5 and the intake diaphragm valve 6. During the purging process, the temperature, intake air flow, exhaust gas temperature, etc. are monitored through the exhaust gas purging diaphragm 5 and the intake diaphragm valve 6, and the trace residual gas is discharged through the intake diaphragm valve 6 to avoid metal particles falling into the nitrogen gas. It has the comprehensive performance of simultaneously meeting high pressure, vacuum, high and low temperatures. Then, the nitrogen gas is discharged through the manifold pipe 7 and the discharge port 9. During the discharging process, both the first pressure transmitter 8 and the second pressure transmitter 12 can realize real-time acquisition and monitoring of the pressure signal, and give an early warning in case of abnormal conditions. Finally, these nitrogen gases will enter the interior of the fuel cell vehicle. Through the purging of nitrogen gas, the impurities and water vapor inside the fuel cell are removed. At the same time, the purging of nitrogen gas makes the concentration of fuel and oxygen inside the fuel cell reach a certain balance to ensure the power delivered by the battery. Finally, the blockage inside the battery is removed and the internal corrosion is reduced through the purging of nitrogen gas, restoring the activity and normal working state of the battery.

[0035] The above are all the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model shall be covered within the protection scope of the present utility model.

Claims

1. Purge gas device, including a nitrogen gas box (1), characterized in that: The top surface of the nitrogen gas box body (1) is fixedly installed with a control panel (2). On both sides of the surface of the control panel (2), first air blowing valves (3) are provided. A second air blowing valve (4) is connected below the first air blowing valve (3). One side of one group of the second air blowing valves (4) is connected with an exhaust gas purging diaphragm (5), and one side of the other group of the second air blowing valves (4) is connected with an intake air diaphragm valve (6). One side of the intake air diaphragm valve (6) is connected with a confluence pipe (7). The other side of the confluence pipe (7) is connected with the exhaust gas purging diaphragm (5). A first pressure transmitter (8) is connected in the middle of the confluence pipe (7), and the other end of the first pressure transmitter (8) is fixedly connected with a discharge port (9). The discharge port (9) is arranged on the confluence pipe (7).

2. The purging gas device according to claim 1, wherein: A first connecting pipe (10) is arranged at the connection between the first air blowing valve (3) and the second air blowing valve (4). One end of the first connecting pipe (10) is connected with the first air blowing valve (3), and the other end is connected with the second air blowing valve (4).

3. The purging gas device according to claim 1, wherein: Second connecting pipes (11) are arranged at the connections between the second air blowing valve (4) and the exhaust gas purging diaphragm (5) and the intake air diaphragm valve (6). One end of the second connecting pipe (11) is connected with the second air blowing valve (4), and the other end is connected with the exhaust gas purging diaphragm (5) and the intake air diaphragm valve (6).

4. The purging gas device according to claim 1, wherein: The control panel (2) is made of stainless steel 316L.

5. The purging gas device according to claim 1, wherein: Second pressure transmitters (12) are connected to the rear ends of the exhaust gas purging diaphragm (5) and the intake air diaphragm valve (6).

6. The purging gas device according to claim 1, wherein: The confluence pipe (7) and the discharge port (9) are both made of stainless steel 316L.

7. The purging gas device according to claim 1, characterized in that: The control panel (2) is a large-flow double-sided automatic switching pressure panel.

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