A hydrogen leakage monitoring device for a hydrogen energy fuel cell

Abstract

The utility model discloses a kind of hydrogen energy fuel cell's hydrogen leakage monitoring device, belong to hydrogen fuel cell technical field, the hydrogen leakage monitoring device of this hydrogen energy fuel cell, including connecting mechanism and detection mechanism, the detection mechanism for detecting air pressure and gas concentration is fixed with welding on the connecting mechanism, the screwing mechanism for being connected with hydrogen tank is also rotationally arranged on the connecting mechanism.The utility model is set through connecting mechanism, detection mechanism, screwing mechanism and sensing mechanism, the connection sealing property of the device is effectively improved, joint drop-off can also be avoided, and double monitoring of internal air pressure and external hydrogen is realized, the accuracy of monitoring is improved, through the setting of detector, sensing mechanism and exhaust mechanism, when hydrogen fuel cell appears hydrogen leakage, the device will alarm prompt, and start exhaust mechanism to efficiently remove gas near hydrogen fuel cell, to reduce hydrogen concentration, improve safety.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen fuel cell technology, and in particular to a hydrogen leakage monitoring device for a hydrogen energy fuel cell. Background Technology

[0002] A hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. Its main structure includes a proton exchange membrane, electrodes, catalyst, and bipolar plates. Hydrogen decomposes into protons and electrons under the action of the anode catalyst. Protons pass through the proton exchange membrane to the cathode, while electrons form an electric current through an external circuit. Oxygen combines with protons and electrons at the cathode to form water. Because hydrogen is flammable and explosive, once a leak occurs and reaches a certain concentration in the air, it may cause an explosion or other serious safety accidents when exposed to open flames or static electricity. Therefore, hydrogen leak monitoring devices are crucial for hydrogen fuel cell systems. They can monitor hydrogen concentration in real time and issue an alarm in time once a leak is detected, so that measures can be taken to avoid safety accidents and ensure the safety of personnel and equipment.

[0003] In existing technologies, hydrogen leaks in hydrogen fuel cells are mostly monitored using gas concentration detectors with alarm functions. While these devices can detect hydrogen concentration and issue alarms, they are installed independently outside the hydrogen storage and transmission system and lack hydrogen pressure monitoring mechanisms. Their detection modes are limited and their detection range is narrow. Hydrogen fuel cells are often large, and the storage tank and battery are usually designed as separate compartments. When a leak occurs in a distant part of the hydrogen fuel cell system, a standalone concentration detector cannot react in time. Furthermore, existing hydrogen leak detection devices lack a linked venting mechanism, making it impossible to actively reduce the hydrogen concentration and providing insufficient reaction time for personnel. Before people can react and take action, the leaked hydrogen concentration can easily rise to a dangerous level.

[0004] Therefore, there is an urgent need to provide a hydrogen leakage monitoring device for hydrogen fuel cells to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a hydrogen leakage monitoring device for hydrogen energy fuel cells.

[0006] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: a hydrogen leakage monitoring device for a hydrogen fuel cell is provided, including a connecting mechanism and a detection mechanism. The connecting mechanism is welded and fixed with a detection mechanism for detecting gas pressure and gas concentration. The connecting mechanism is also rotatably provided with a screwing mechanism for connecting to a hydrogen tank.

[0007] A sensing mechanism is inserted and fixed onto the detection mechanism;

[0008] The connecting mechanism is connected to an exhaust mechanism for discharging leaked hydrogen gas via a clamp.

[0009] The present invention is further configured such that: the connecting mechanism includes a connecting tube, one end of the connecting tube is embedded with a rubber gasket, an annular protrusion is integrally fixed on the connecting tube, and an external threaded connector is integrally fixed on the other end of the connecting tube.

[0010] Through the above technical solution, the connecting pipe is made of seamless alloy steel pipe, the external threaded joint can be used to connect to the hydrogen pipeline of the battery, the other end of the connecting pipe can be connected to the hydrogen cylinder, and the rubber gasket can effectively improve the sealing of the connection.

[0011] The present invention is further configured such that: the detection mechanism includes a vent pipe sealed and welded to the top of the connecting pipe, a detector is fixed to the top of the vent pipe, an alarm speaker is electrically connected to the detector, and an alarm light is also electrically connected to the top of the detector.

[0012] The detector is equipped with a gas pressure detection module, a processor, and a transmitter module. The gas pipe is connected to the gas pressure detection module, enabling the detector to monitor the gas pressure in the hydrogen cylinder and hydrogen pipeline. When the gas pressure in the hydrogen cylinder and hydrogen pipeline drops abnormally, it indicates that there may be a hydrogen leak in the hydrogen fuel cell. The processor will then control the alarm speaker and alarm light to turn on, thus providing a warning.

[0013] The present invention is further configured such that: the screwing mechanism includes an inner threaded sleeve rotatably disposed outside the connecting pipe, a hand-tightening part integrally fixed on the inner threaded sleeve, a clamping component rotatably connected to the inner threaded sleeve, a hook part integrally fixed at one end of the clamping component, and a spring fixed on the clamping component.

[0014] With the above technical solution, the inner threaded sleeve is set at one end of the rubber gasket of the connecting pipe. The hydrogen cylinder that matches the device is equipped with the same annular protrusion and external threaded joint structure as the connecting mechanism. When installing the device, the operator can align the inner threaded sleeve with the external threaded joint of the hydrogen cylinder and tighten it by hand. After the inner threaded sleeve is tightened, it will press the rubber gasket onto the joint of the hydrogen cylinder to form a sealed connection. During the tightening process, since the end of the hook part is beveled, the hook part will pass over the annular protrusion. Under the restoring action of the spring and the lever action of the clamping component, the hook part will clamp and hook the annular protrusion, thereby preventing the connection from loosening and improving the sealing and safety of the connection.

[0015] The present invention is further configured such that: the sensing mechanism includes a connector that is plugged into and fixed on the detector, a wire protection tube is fixed at the bottom end of the connector, and hydrogen sensors are fixed at both ends of the wire protection tube.

[0016] Through the above technical solution, the connector is electrically connected to the detector, and the wire protection tube is T-shaped. Two wires are installed inside the wire protection tube, both of which are electrically connected to the connector, and their ends are electrically connected to the hydrogen sensor. The T-shaped wire protection tube makes the hydrogen sensor closer to the connection points at both ends of the connecting tube. When hydrogen leakage occurs at the connection point, the hydrogen sensor can detect it quickly, thereby improving the reaction speed of the device. When the hydrogen sensor detects an increase in hydrogen concentration, the alarm speaker and alarm light will also be activated to provide a warning.

[0017] The present invention is further configured such that: the exhaust mechanism includes a fixing clamp fixed to the outside of the connecting pipe, a three-way pipe fixed on the fixing clamp, and two air extraction ports fixed on the three-way pipe.

[0018] With the above technical solution, the two exhaust ports are respectively oriented towards the two joints of the device, thereby improving the hydrogen extraction efficiency of the device. The fixing clamps make the exhaust mechanism easy to disassemble and assemble. When installing the device, the staff can connect the joints first and then install the exhaust mechanism, thereby avoiding the exhaust mechanism from interfering with the installation work.

[0019] The present invention is further configured such that: a tapered cylinder is connected to the three-way pipe, a connecting frame is fixed inside the tapered cylinder, a motor is fixed on the connecting frame, and an exhaust fan is fixed on the output shaft of the motor.

[0020] Through the above technical solution, the larger end of the conical cylinder can be connected to the exhaust pipe, and the motor is electrically connected to the detector. When the device detects a hydrogen fuel cell leak, the processor in the detector will turn on the motor. At this time, the exhaust fan will turn on and exhaust the gas near the hydrogen fuel cell, thereby reducing the hydrogen concentration near the hydrogen fuel cell and avoiding the risk of deflagration caused by excessive hydrogen concentration. The conical cylinder effectively increases the impeller diameter of the exhaust fan, thereby increasing the exhaust rate.

[0021] The beneficial effects of this utility model are as follows:

[0022] 1. By setting up a connection mechanism, a detection mechanism, a screwing mechanism and a sensing mechanism, this utility model effectively improves the connection sealing of the device, prevents the joint from falling off, and realizes dual monitoring of internal gas pressure and external hydrogen, thereby improving the accuracy of monitoring.

[0023] 2. By incorporating a detector, sensing mechanism, and exhaust mechanism, this invention will issue an alarm when hydrogen leaks from the hydrogen fuel cell and activate the exhaust mechanism to efficiently remove gas near the hydrogen fuel cell, thereby reducing the hydrogen concentration and improving safety. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is a structural diagram of the connection mechanism and the detection mechanism of this utility model;

[0026] Figure 3 This is a structural diagram of the screwing mechanism of this utility model;

[0027] Figure 4 This is a structural diagram of the sensing mechanism of this utility model;

[0028] Figure 5 This is a structural diagram of the exhaust mechanism of this utility model.

[0029] In the diagram: 1. Connecting mechanism; 101. Connecting pipe; 102. Rubber gasket; 103. Annular protrusion; 104. External threaded connector; 2. Detection mechanism; 201. Vent pipe; 202. Detector; 203. Alarm speaker; 204. Alarm light; 3. Tightening mechanism; 301. Internal threaded sleeve; 302. Hand-tightening part; 303. Clamping part; 304. Hook part; 305. Spring; 4. Sensing mechanism; 401. Plug; 402. Wire protection tube; 403. Hydrogen sensor; 5. Exhaust mechanism; 501. Fixing clamp; 502. T-joint pipe; 503. Air extraction port; 504. Conical cylinder; 505. Connecting frame; 506. Motor; 507. Exhaust fan. Detailed Implementation

[0030] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0031] Please see Figures 1-5A hydrogen leak monitoring device for a hydrogen fuel cell includes a connection mechanism 1 and a detection mechanism 2. The connection mechanism 1 includes a connecting pipe 101, one end of which is embedded with a rubber gasket 102. An annular protrusion 103 is integrally fixed to the connecting pipe 101, and the other end of which is integrally fixed with an external threaded connector 104. The connecting pipe 101 is made of seamless alloy steel. The external threaded connector 104 can be used to connect to the hydrogen pipeline of the battery. The other end of the connecting pipe 101 can be connected to a hydrogen cylinder. The rubber gasket 102 effectively improves the sealing of the connection. A detection mechanism 2 for detecting gas pressure and gas concentration is welded and fixed to the connection mechanism 1. The detection mechanism 2 includes... A vent pipe 201 is sealed and welded to the top of the connecting pipe 101. A detector 202 is fixed to the top of the vent pipe 201. An alarm speaker 203 is electrically connected to the detector 202, and an alarm light 204 is also electrically connected to the top of the detector 202. The detector 202 is equipped with a gas pressure detection module, a processor, and a transmitter module. The vent pipe 201 is connected to the gas pressure detection module, so that the detector 202 can monitor the gas pressure in the hydrogen cylinder and hydrogen pipeline. When the gas pressure in the hydrogen cylinder and hydrogen pipeline drops abnormally, it indicates that there may be a hydrogen leak in the hydrogen fuel cell. The processor will control the alarm speaker 203 and the alarm light 204 to turn on, thereby providing an alert.

[0032] like Figure 1 and Figure 3 As shown, the connecting mechanism 1 is also rotatably equipped with a screwing mechanism 3 for connecting to a hydrogen tank. The screwing mechanism 3 includes an inner threaded sleeve 301 rotatably disposed outside the connecting pipe 101. A hand-tightening part 302 is integrally fixed on the inner threaded sleeve 301. A clamping part 303 is also rotatably connected to the inner threaded sleeve 301. A hook part 304 is integrally fixed at one end of the clamping part 303. A spring 305 is also fixed on the clamping part 303. The inner threaded sleeve 301 is disposed at one end of the rubber gasket 102 of the connecting pipe 101. The hydrogen tank that is matched with this device is provided with an annular protrusion 103 and an outer threaded connection, which are the same as those of the connecting mechanism 1. With the head 104 structure, when installing this device, the operator can align the inner threaded sleeve 301 with the outer threaded connector 104 of the hydrogen cylinder and tighten it through the hand-tightening part 302. After the inner threaded sleeve 301 is tightened, it will press the rubber gasket 102 onto the connector of the hydrogen cylinder to form a sealed connection. During the tightening process, since the end of the hook part 304 is beveled, the hook part 304 will pass over the annular protrusion 103. Under the reset action of the spring 305 and the lever action of the clamping part 303, the hook part 304 will clamp and hook the annular protrusion 103, thereby preventing the connection from loosening and improving the sealing and safety of the connection.

[0033] like Figure 1 and Figure 4As shown, a sensing mechanism 4 is inserted and fixed to the detection mechanism 2. The sensing mechanism 4 includes a connector 401 inserted and fixed to the detector 202. A wire protection tube 402 is fixed to the bottom end of the connector 401. Hydrogen sensors 403 are fixed to both ends of the wire protection tube 402. The connector 401 is electrically connected to the detector 202. The wire protection tube 402 is T-shaped and contains two wires. Both wires are electrically connected to the connector 401, and their ends are electrically connected to the hydrogen sensors 403 respectively. The T-shaped wire protection tube 402 makes the hydrogen sensors 403 closer to the connection points at both ends of the connecting tube 101. When hydrogen leakage occurs at the connection point, the hydrogen sensors 403 can detect it quickly, thereby improving the reaction speed of the device. When the hydrogen sensors 403 detect an increase in hydrogen concentration, the alarm speaker 203 and the alarm light 204 will also be activated to provide a warning.

[0034] like Figure 1 and Figure 5 As shown, the connecting mechanism 1 is connected to an exhaust mechanism 5 for discharging leaked hydrogen. The exhaust mechanism 5 includes a fixing clamp 501 fixed to the outside of the connecting pipe 101, a three-way pipe 502 fixed to the fixing clamp 501, two suction ports 503 fixed to the three-way pipe 502, and a conical cylinder 504 connected to the three-way pipe 502. A connecting frame 505 is fixed inside the conical cylinder 504, and a motor 506 is fixed to the connecting frame 505. An exhaust fan 507 is fixed to the output shaft of the motor 506. The two suction ports 503 face the two joints of the device, thereby improving the hydrogen extraction efficiency of the device. The fixing clamp 501 allows the exhaust to... Mechanism 5 can be easily disassembled and assembled. When installing this device, the staff can connect the connectors first and then install the exhaust mechanism 5, thereby avoiding interference from the exhaust mechanism 5 with the installation work. The larger end of the conical cylinder 504 can be connected to the exhaust pipe. The motor 506 is electrically connected to the detector 202. When the device detects a hydrogen fuel cell leak, the processor in the detector 202 will turn on the motor 506. At this time, the exhaust fan 507 will turn on and exhaust the gas near the hydrogen fuel cell, thereby reducing the hydrogen concentration near the hydrogen fuel cell and avoiding the risk of deflagration due to excessive hydrogen concentration. The conical cylinder 504 effectively increases the impeller diameter of the exhaust fan 507, thereby increasing the exhaust rate.

[0035] In use, the operator first connects the device to the hydrogen storage tank and the hydrogen fuel cell pipeline via the connecting mechanism 1, and then fixes the exhaust mechanism 5 to the device via the fixing clamp 501. At this time, the detection mechanism 2 can not only monitor the hydrogen concentration in the air, but also monitor the gas pressure in the hydrogen storage tank and the hydrogen fuel cell pipeline. When the hydrogen concentration in the air increases or the gas pressure in the hydrogen storage tank drops abnormally, the device will sound an alarm and open the exhaust mechanism 5 to exhaust gas, effectively ensuring the safety of the hydrogen fuel cell during use.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A hydrogen leakage monitoring device for a hydrogen fuel cell, comprising a connecting mechanism (1) and a detection mechanism (2), characterized in that: The connecting mechanism (1) is welded and fixed with a detection mechanism (2) for detecting gas pressure and gas concentration. The connecting mechanism (1) is also rotatably provided with a screwing mechanism (3) for connecting with a hydrogen tank. A sensing mechanism (4) is inserted and fixed onto the detection mechanism (2); The connecting mechanism (1) is connected to an exhaust mechanism (5) for discharging leaked hydrogen gas via a clamp.

2. The hydrogen leakage monitoring device for a hydrogen fuel cell according to claim 1, characterized in that: The connecting mechanism (1) includes a connecting tube (101), one end of which is embedded with a rubber gasket (102), and an annular protrusion (103) is integrally fixed on the connecting tube (101), and an external threaded connector (104) is integrally fixed on the other end of the connecting tube (101).

3. The hydrogen leakage monitoring device for a hydrogen fuel cell according to claim 2, characterized in that: The detection mechanism (2) includes a vent pipe (201) sealed and welded to the top of the connecting pipe (101). A detector (202) is fixed to the top of the vent pipe (201). An alarm speaker (203) is electrically connected to the detector (202). An alarm light (204) is also electrically connected to the top of the detector (202).

4. The hydrogen leakage monitoring device for a hydrogen fuel cell according to claim 2, characterized in that: The screwing mechanism (3) includes an inner threaded sleeve (301) rotatably disposed outside the connecting pipe (101), a hand-tightening part (302) integrally fixed on the inner threaded sleeve (301), a clamping component (303) rotatably connected to the inner threaded sleeve (301), a hook part (304) integrally fixed at one end of the clamping component (303), and a spring (305) fixed on the clamping component (303).

5. The hydrogen leakage monitoring device for a hydrogen fuel cell according to claim 3, characterized in that: The sensing mechanism (4) includes a connector (401) that is plugged into and fixed on the detector (202). A wire protection tube (402) is fixed at the bottom end of the connector (401), and hydrogen sensors (403) are fixed at both ends of the wire protection tube (402).

6. The hydrogen leakage monitoring device for a hydrogen fuel cell according to claim 2, characterized in that: The exhaust mechanism (5) includes a fixing clamp (501) that is fixed to the outside of the connecting pipe (101), a three-way pipe (502) is fixed on the fixing clamp (501), and two air extraction ports (503) are fixed on the three-way pipe (502).

7. A hydrogen leakage monitoring device for a hydrogen fuel cell according to claim 6, characterized in that: A tapered cylinder (504) is also connected to the three-way pipe (502). A connecting frame (505) is fixed inside the tapered cylinder (504). A motor (506) is fixed on the connecting frame (505). An exhaust fan (507) is fixed on the output shaft of the motor (506).

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