Hydrogen leakage detection equipment for hydrogen refueling station

Abstract

The invention discloses hydrogen refueling station hydrogen leakage detection equipment, and relates to the technical field of hydrogen leakage detection.The hydrogen refueling station hydrogen leakage detection equipment comprises a flexible cylinder arranged outside a hydrogen pipeline valve in a sleeving mode and further comprises a detection mechanism and two sealing assemblies, and the two ends of the flexible cylinder are fixedly arranged on a hydrogen pipeline in a sleeving mode through the sealing assemblies; the detection mechanism comprises a detection box fixedly mounted on the hydrogen pipeline, a gas pump fixedly mounted outside the detection box, and a mounting box, a gas storage box I and a gas storage box II which are fixedly mounted inside the detection box; a laser transmitter, a photoelectric sensor, an alarm and a transparent tube with two sealed ends are fixedly mounted in the mounting box, the laser transmitter and the photoelectric sensor are respectively arranged on two sides of the transparent tube, and the photoelectric sensor is in control connection with the alarm. According to the hydrogen leakage detection equipment for the hydrogen refueling station, hydrogen leakage is detected by detecting changes of light interference signals, tiny leakage can be captured in time, and the safety of the hydrogen refueling station is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen leakage detection, and in particular to hydrogen leakage detection equipment for a hydrogen refueling station. Background Art

[0002] As a clean energy source, hydrogen is increasingly used in the energy field, especially in hydrogen refueling stations, due to its high energy density and environmentally friendly properties. However, hydrogen is colorless, odorless, flammable and explosive, and leaks are difficult to detect. Once the leakage concentration reaches a certain proportion, it is very likely to cause a fire or explosion, posing a serious threat to personnel safety and equipment operation. Therefore, hydrogen leak detection is crucial to ensuring the safety of hydrogen refueling stations and the surrounding environment.

[0003] Existing hydrogen leak detection devices usually require hydrogen to reach a certain concentration before triggering an alarm. However, the space inside a hydrogen refueling station is large and the air circulation is good. After a hydrogen leak, the concentration is diluted quickly, making it difficult for existing equipment to detect low-concentration hydrogen in a timely manner.

[0004] Therefore, it is necessary to propose a hydrogen leakage detection device for a hydrogen refueling station to solve the above problems. Summary of the Invention

[0005] Technical problem to be solved: The purpose of the present invention is to provide a hydrogen leak detection device for a hydrogen refueling station to solve the problem proposed in the above background technology that the existing hydrogen leak detection device usually requires hydrogen to reach a certain concentration to trigger an alarm, while the space in the hydrogen refueling station is large and the air circulation is good. After the hydrogen leaks, the concentration is diluted quickly, resulting in the existing equipment being unable to detect low-concentration hydrogen in a timely manner.

[0006] Technical solution: To achieve the above objectives, the present invention is implemented through the following technical solutions: A hydrogen leak detection device for a hydrogen refueling station, comprising a flexible cylinder sleeved on the outside of a hydrogen pipeline valve, a detection mechanism and two sealing components, both ends of the flexible cylinder are fixedly sleeved on the hydrogen pipeline through the sealing components, the detection mechanism comprises a detection box fixedly mounted on the hydrogen pipeline, an air pump fixedly mounted on the outside of the detection box, and an installation box fixedly mounted inside the detection box, an air storage box I, and an air storage box II; a laser emitter, a photoelectric sensor, an alarm, and a transparent tube sealed at both ends are fixedly installed in the installation box, and the laser emitter and the photoelectric sensor are respectively arranged on both sides of the transparent tube , the photoelectric sensor is controlled and connected to the alarm device, a transparent piston is slidably sleeved on the middle part of the transparent tube, and a plurality of light-shielding rings are axially spaced on the transparent tube and the transparent piston; both ends of the transparent tube are fixedly installed with connecting pipes I communicating with the interior thereof, and the other ends of the two connecting pipes I are respectively communicated with the air storage box I and the air storage box II, and a connecting pipe II communicating with the interior thereof is fixedly installed on the air storage box II, and the other end of the connecting pipe II extends out of the detection box and is communicated with the interior of the flexible cylinder; a tee is fixedly installed on the suction end of the air pump, and the other two ports of the tee are respectively communicated with the air storage box I and the air storage box II, and a one-way exhaust valve is provided in the two ports of the tee communicating with the air storage box I and the air storage box II.

[0007] Preferably, the sealing assembly includes an annular airbag and a plurality of bolts. The annular airbag is movably sleeved on the outside of the hydrogen pipeline. Flanges I are concentrically fixedly installed at both ends of the annular airbag. The two flanges I are fixed together by a plurality of bolts.

[0008] Preferably, the detection mechanism also includes a flange II located between the two sealing assemblies and bolted to one of the flanges I. A fixed cylinder is concentrically fixedly installed on the side of the flange II close to the valve, and the detection box is fixedly installed on the fixed cylinder. One end of the connecting pipe II passes through the detection box and the fixed cylinder in sequence and is connected to the interior of the flexible cylinder.

[0009] Preferably, an air nozzle connected to the interior of the flexible tube is fixedly mounted on one end of the flexible tube, and a threaded joint is provided on the end of the connecting pipe II away from the air storage box II, and the threaded joint is threadedly connected to the air nozzle.

[0010] Beneficial effects: Compared with the prior art, the present invention provides a hydrogen leak detection device for a hydrogen refueling station. The hydrogen leak detection device for a hydrogen refueling station has a unique structure and is easy to use. The device emits laser light through a laser emitter, which is received by a photoelectric sensor after passing through the gap between adjacent light-shielding rings. After the air pump is started, the gas in the flexible cylinder is extracted to form a negative pressure. Under normal circumstances, the transparent piston remains stationary in the transparent tube. Once hydrogen leaks at the joints at both ends of the valve, the flexible cylinder is connected to the gas storage tank II, causing the air pressure in the gas storage tank II to be higher than that in the gas storage tank I. The transparent piston moves upward under the action of the air pressure, changing the gap between adjacent light-shielding rings, causing the photoelectric sensor to detect a change in the light interference signal, thereby triggering an alarm. The device detects hydrogen leaks by detecting changes in the light interference signal, and can capture tiny leaks in time to ensure the safety of the hydrogen refueling station. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the interior of the flexible tube structure of the present invention; Figure 3 It is a cross-sectional schematic diagram of the structure of the present invention; Figure 4 Schematic cross-sectional view of the detection box structure of the present invention; Figure 5 It is a three-dimensional schematic diagram of the threaded joint structure of the present invention.

[0012] In the figure: 1. Valve; 2. Flexible cylinder; 3. Sealing assembly; 31. Flange I; 32. Annular airbag; 33. Bolt; 4. Detection mechanism; 41. Flange II; 42. Fixing cylinder; 43. Detection box; 44. Air pump; 45. Installation box; 46. Air storage box I; 47. Air storage box II; 48. Transparent tube; 49. Transparent piston; 410. Laser emitter; 411. Photoelectric sensor; 412. Connecting pipe I; 413. Tee pipe; 414. Connecting pipe II; 415. Threaded joint. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the accompanying drawings and examples.

[0014] Example 1: This example 1 provides a hydrogen leak detection device for a hydrogen refueling station. It is a direct improvement on the existing hydrogen leak detection device and has a unique structure. Figure 1-5As shown, it includes a flexible cylinder 2 sleeved on the outside of the hydrogen pipeline valve 1, a detection mechanism 4 and two sealing components 3. Both ends of the flexible cylinder 2 are fixedly sleeved on the hydrogen pipeline through the sealing components 3. The detection mechanism 4 includes a detection box 43 fixedly installed on the hydrogen pipeline, an air pump 44 fixedly installed on the outside of the detection box 43, and an installation box 45, an air storage box I 46, and an air storage box II 47 fixedly installed inside the detection box 43; the sealing component 3 includes an annular airbag 32 and multiple bolts 33. The annular airbag 32 is movably sleeved on the outside of the hydrogen pipeline. Flanges I 31 are concentrically fixedly installed at both ends of the annular airbag 32, and the two flanges I 31 are fixedly connected together by multiple bolts 33.

[0015] When fixing the flexible tube 2 to the hydrogen pipeline, first insert the two ends of the flexible tube 2 into the gaps between the adjacent annular airbags 32 and the hydrogen pipeline, and then tighten multiple bolts 33 in sequence to reduce the distance between the flanges I 31 at both ends of the annular airbags 32. When the distance between the two flanges I 31 is reduced, the annular airbags 32 will expand inward and outward, so that the ends of the flexible tube 2 are firmly covered on the hydrogen pipeline to prevent leakage.

[0016] A laser emitter 410, a photoelectric sensor 411, an alarm, and a transparent tube 48 sealed at both ends are fixedly installed in the installation box 45. The laser emitter 410 and the photoelectric sensor 411 are respectively arranged on both sides of the transparent tube 48. The photoelectric sensor 411 is controlled and connected to the alarm. A transparent piston 49 is slidably sleeved on the middle part of the transparent tube 48. A plurality of light-shielding rings are provided on the transparent tube 48 and the transparent piston 49 at intervals along the axial direction. There are many ways to install the transparent tube 48, for example: a through hole is concentrically opened at the upper and lower ends of the installation box 45, and the transparent tube 48 is glued in the through hole; both ends of the transparent tube 48 They are both fixedly installed with connecting pipes I 412 communicating with their interiors, and the other ends of the two connecting pipes I 412 are respectively communicated with the air storage box I 46 and the air storage box II 47. The air storage box II 47 is fixedly installed with a connecting pipe II 414 communicating with its interior, and the other end of the connecting pipe II 414 extends out of the detection box 43 and communicates with the interior of the flexible cylinder 2; the suction end of the air pump 44 is fixedly installed with a three-way pipe 413, and the other two ports of the three-way pipe 413 are respectively communicated with the air storage box I 46 and the air storage box II 47, and the two ports of the three-way pipe 413 communicating with the air storage box I 46 and the air storage box II 47 are both provided with one-way exhaust valves.

[0017] There are various ways to install the detection box 43. For example, the detection mechanism 4 also includes a flange II 41 located between the two sealing components 3 and bolted to one of the flanges I 31. A fixed cylinder 42 is concentrically fixedly installed on the side of the flange II 41 close to the valve 1. The detection box 43 is fixedly installed on the fixed cylinder 42. One end of the connecting pipe II 414 passes through the detection box 43 and the fixed cylinder 42 in sequence and is connected to the interior of the flexible cylinder 2.

[0018] Working principle: When the device is in use, first connect the device to an external power source, the laser emitter 410 emits a laser, the laser passes through the gap between adjacent light shielding rings and is received by the photoelectric sensor 411, and then the air pump 44 is started. The air pump 44 extracts the gas in the flexible cylinder 2 through the connecting pipe I 412, the three-way pipe 413 and the connecting pipe II 414, so that the flexible cylinder 2 is in a negative pressure state. Since the two ends of the transparent tube 48 are respectively connected to the gas storage box I 46 and the gas storage box II 47, and in the exhaust state, the gas storage box I 46 and the gas storage box II 47 are connected through the three-way pipe 413. Therefore, the air pressure at both ends of the transparent piston 49 is the same, and the transparent piston 49 remains motionless in the transparent tube 48. When hydrogen leaks at the joints at both ends of the valve 1, since the flexible cylinder 2 is connected with the interior of the gas storage box II 47, the air pressure inside the gas storage box II 47 is greater than the air pressure inside the gas storage box I 46, and the transparent piston 49 will move slightly upward under the action of the air pressure, thereby changing the gap between adjacent light-shielding rings, and the photoelectric sensor 411 can detect the change in the light interference signal, and the photoelectric sensor 411 transmits the signal to the alarm, which can sound an alarm.

[0019] Example 2: The difference between Example 2 and Example 1 is that Figure 5 As shown, a gas nozzle connected to the interior of the flexible tube 2 is fixedly installed at one end thereof, and a threaded joint 415 is provided at one end of the connecting pipe II 414 away from the air storage box II 47. The threaded joint 415 is threadedly connected to the gas nozzle, and the threaded joint 415 is threadedly connected to the gas nozzle, thereby facilitating the installation of the detection equipment.

[0020] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A hydrogen leak detection device for a hydrogen refueling station, comprising a flexible cylinder (2) sleeved on the outside of a hydrogen pipeline valve (1), characterized in that: The invention also includes a detection mechanism (4) and two sealing components (3). Both ends of the flexible cylinder (2) are fixedly sleeved on the hydrogen pipeline through the sealing components (3). The detection mechanism (4) includes a detection box (43) fixedly installed on the hydrogen pipeline, an air pump (44) fixedly installed outside the detection box (43), and an installation box (45) fixedly installed inside the detection box (43), an air storage box I (46), and an air storage box II (47). A laser emitter (410), a photoelectric sensor (411), an alarm, and a transparent tube (48) sealed at both ends are fixedly installed in the installation box (45). The laser emitter (410) and the photoelectric sensor (411) are respectively arranged on both sides of the transparent tube (48). The photoelectric sensor (411) is connected to the alarm control. A transparent piston (49) is slidably sleeved on the middle part of the transparent tube (48). ), a plurality of light-shielding rings are provided on the transparent tube (48) and the transparent piston (49) at intervals along the axial direction; both ends of the transparent tube (48) are fixedly provided with connecting tubes I (412) communicating with the interior thereof, the other ends of the two connecting tubes I (412) are respectively communicated with the air storage box I (46) and the air storage box II (47), and a connecting tube II (414) communicating with the interior thereof is fixedly provided on the air storage box II (47), the other end of the connecting tube II (414) extending out of the detection box (43) and communicating with the interior of the flexible cylinder (2); a three-way pipe (413) is fixedly provided on the suction end of the air pump (44), the other two ports of the three-way pipe (413) are respectively communicated with the air storage box I (46) and the air storage box II (47), and a one-way exhaust valve is provided in the two ports of the three-way pipe (413) communicating with the air storage box I (46) and the air storage box II (47).

2. A hydrogen leak detection device for a hydrogen refueling station according to claim 1, characterized in that: The sealing assembly (3) includes an annular airbag (32) and a plurality of bolts (33). The annular airbag (32) is movably mounted on the outside of the hydrogen pipeline. Flanges I (31) are concentrically fixedly mounted on both ends of the annular airbag (32). The two flanges I (31) are fixedly connected together by a plurality of bolts (33).

3. A hydrogen leak detection device for a hydrogen refueling station according to claim 2, characterized in that: The detection mechanism (4) further comprises a flange II (41) located between the two sealing assemblies (3) and bolted to one of the flanges I (31). A fixed cylinder (42) is fixedly mounted concentrically on one side of the flange II (41) close to the valve (1). The detection box (43) is fixedly mounted on the fixed cylinder (42). One end of the connecting pipe II (414) passes through the detection box (43) and the fixed cylinder (42) in sequence and is connected to the interior of the flexible cylinder (2).

4. The hydrogen leak detection equipment for a hydrogen refueling station according to claim 1, characterized in that: An air nozzle communicating with the interior of the flexible cylinder (2) is fixedly mounted on one end thereof, and a threaded joint (415) is provided at one end of the communicating pipe II (414) away from the air storage box II (47), and the threaded joint (415) is threadedly connected to the air nozzle.

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