Hydrogen loading pry with leakage detection function

Abstract

The invention relates to the technical field of hydrogen, in particular to a hydrogen loading pry for leakage detection, which comprises a main body, a transmission pipeline, a hydrogen loading arm, a detection module and an exhaust part, the main body comprises a seat plate, the right side of the upper end surface of the seat plate is fixedly connected with a back plate, and the upper side of the seat plate is provided with the transmission pipeline; the right side of the back plate is provided with a hydrogen loading arm, the hydrogen loading arm is communicated with the transmission pipeline, the upper side of the seat plate is fixedly connected with a sealing housing, the sealing housing is fixedly connected with the back plate, the front side of the sealing housing is provided with a gas outlet, and the gas outlet is provided with a detection module; the detection module comprises a seat part, an extension part, a tension spring, a guide rail, a clamping plate, a positioning part and a warning part, and the main body, the detection module and other structures are arranged, so that the hydrogen loading pry can carry out comprehensive and effective hydrogen leakage detection on a transmission pipeline with a wide coverage range and a complex structure; and multi-mode early warning is carried out on workers.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen, and in particular to a hydrogen loading skid for leak detection. Background Art

[0002] The hydrogen loading skid is an integrated equipment mainly used for filling and transporting hydrogen. It usually includes a hydrogen storage mechanism, a transmission pipeline and a hydrogen loading arm. The transmission pipeline is used to transport the hydrogen in the hydrogen storage mechanism to the hydrogen loading arm, and is connected to the vehicle through the hydrogen loading arm to refuel the vehicle.

[0003] The transmission pipeline of a hydrogen loading skid is usually composed of multiple pipelines and is equipped with stop valves, filters, flow meters, emergency shut-off valves and other equipment to ensure the safe transportation of hydrogen. However, due to the wide coverage and complex structure of the transmission pipeline, a single hydrogen detection device may be difficult to fully and effectively realize leak detection. Therefore, based on the above problems, a hydrogen loading skid with leak detection is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a hydrogen loading skid with leakage detection to solve the problem that the transmission pipeline of the existing hydrogen loading skid has a wide coverage and a complex structure, and a single hydrogen detection device may be difficult to comprehensively and effectively detect hydrogen leakage.

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

[0006] A hydrogen loading skid for leak detection comprises a main body, a transmission pipeline, a hydrogen loading arm, a detection module and an exhaust part, wherein the main body comprises a seat plate, a back plate is fixedly connected to the right side of the upper end surface of the seat plate, a transmission pipeline is installed on the upper side of the seat plate, a hydrogen loading arm is installed on the right side of the back plate, and the hydrogen loading arm is communicated with the transmission pipeline, a sealing cover shell is fixedly connected to the upper side of the seat plate, and the sealing cover shell is fixedly connected to the back plate, an air outlet is opened on the front side of the sealing cover shell, a detection module is installed at the air outlet, the detection module comprises a seat part, an extension part, a tension spring, a guide rail, a positioning plate, a positioning part and a warning part, the seat part comprises a seat shell fixed at the air outlet, and the seat shell is communicated with the air outlet, An upper through opening is provided on the upper shell plate of the seat shell, the extending part includes a ring seat located at the lower side of the upper through opening, and the ring seat is fixedly connected to the upper inner wall of the seat shell, the lower inner wall of the ring seat is fixedly connected with a folding tube, the upper end of the folding tube passes through the upper through opening and is fixedly connected to a top plate, a slot is provided on the front side of the top plate, guide rails are fixedly connected to both sides of the upper end surface of the seat shell, guide blocks slidably connected to the guide rails are fixedly connected to the left and right sides of the top plate, and a positioning plate is fixedly connected to the front side of the guide rails, a positioning part is installed on the inner side of the slot, a warning part is installed on the upper side of the top plate, a tension spring located on the inner side of the folding tube is fixedly connected to the lower side of the top plate, and the lower end of the tension spring is fixedly connected to the lower inner wall of the seat shell.

[0007] Preferably, the positioning portion includes a rail frame fixed on the inner side of the slot, a rail block is slidably connected to the inner side of the rail frame, an arc bar is fixedly connected to the rear side of the rail block, both ends of the rear part of the arc bar are fixedly connected to plug blocks, and the plug blocks are inserted into the inner side of the slot of the positioning plate, a telescopic spring is fixedly connected between the front end surface of the rail block and the front inner wall of the rail frame, a metal clicker is fixedly connected to the rear inner wall of the rail frame, and a knocking block that fits with the metal clicker is fixedly connected to the rear side of the arc bar.

[0008] Preferably, the warning part includes a sentry plate fixed between a group of guide rails, a warning whistle is fixedly connected to the inner side of the center hole of the sentry plate, an airbag is fixedly connected to the lower side of the sentry plate, and the lower end surface of the airbag is fixedly connected to the upper end surface of the top plate.

[0009] Preferably, the transmission pipeline consists of an upper pressure relief pipeline and a lower hydrogen transmission pipeline, the upper pipe of the upper pressure relief pipeline of the transmission pipeline passes through a sealing cover, the left pipe of the lower hydrogen transmission pipeline of the transmission pipeline passes through a sealing cover, and a sealing door is installed at the front opening of the sealing cover.

[0010] Preferably, a plurality of equally spaced slots are provided on the front side of the plate body of the positioning plate, the slots of the positioning plate are semicircular slot structures, the rear end of the plug block is a semicircular head structure, the metal clicker is composed of two side connecting pieces and a metal sheet in the middle, and a spacing is left between the metal sheet of the metal clicker and the rear inner wall of the rail frame.

[0011] Preferably, a lower shell plate of the seat shell is provided with a lower sliding opening aligned with the upper through-opening, an exhaust portion is installed on the inner side of the lower sliding opening, the exhaust portion includes a row pipe slidably connected to the lower sliding opening, the upper end of the row pipe is fixedly connected to the lower end surface of the top plate, a circular opening is provided on the rear side of the row pipe below the seat shell, the inner side of the circular opening is fixedly connected to a ring frame, the front side of the ring frame is symmetrically fixedly connected to a connecting rod, the front end of the connecting rod is fixedly connected to a seat block, and the seat block is fixedly connected to the inner wall of the row pipe, a contact button is installed on the rear side of the seat block, a group of the connecting rods are sleeved on the outer side thereof, an exhaust fan is installed on the inner side of the row pipe at the lower side of the circular opening, the lower side of the row pipe is connected to a hose, the other end of the hose is connected to a vertically arranged air guide pipe, the outer side of the air guide pipe is fixedly connected to a fixing bracket, and the fixing bracket is fixed to the front side of the sealing cover shell.

[0012] Preferably, the contact button is electrically connected to the exhaust fan, a pinch block is provided on the rear side of the stopper, the pinch block of the stopper is located on the inner side of the ring frame, the stopper is located on the rear side of the contact button, and the diameter of the exhaust pipe is the same as the inner diameter of the lower sliding opening.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In the present invention, by setting structures such as the main body, transmission pipeline and detection module, when the transmission pipeline is transmitting hydrogen, if the transmission pipeline leaks, hydrogen will enter the sealed cover shell, resulting in an increase in gas in the seat shell, pushing the folding tube to unfold, so that the top plate rises, and the rising of the top plate drives the positioning part to move upward, so that the plug block is squeezed out of the slot by the clamping plate, driving the arc bar and moving the knocking block to squeeze the telescopic spring, and when the positioning part moves up to the upper slot on the clamping plate, the spring is reset, the plug block is inserted into the new slot, and the knocking block knocks the sound piece to issue a warning. This process is suitable for small leaks. In case of large leaks, the top plate rises rapidly, squeezing the airbag, and the gas passes through the warning whistle to issue a whistle sound, completing the leak detection, realizing that the hydrogen loading skid can perform comprehensive and effective hydrogen leak detection on the transmission pipelines with a wide coverage range and complex structure, and provide multi-mode early warning to the staff, solving the problem that the transmission pipelines of the existing hydrogen loading skids have a wide coverage range and complex structure, and a single hydrogen detection device may be difficult to comprehensively and effectively detect hydrogen leaks;

[0015] 2. In the present invention, by providing the main body, detection module, exhaust part and other structures, when hydrogen leaks, the top plate rises to drive the exhaust part to move upward, the top plate reaches a certain height, and the circular opening enters the seat shell, so that the gas in the seat shell pushes the block through the circular opening and the ring frame, triggering the contact button to start the exhaust fan, inhaling hydrogen-containing gas, and the gas is discharged through the exhaust pipe, hose and guide pipe to complete the exhaust and prevent the hydrogen concentration from being too high. This automated exhaust mechanism ensures that the hydrogen loading skid can discharge the leaked hydrogen in time, effectively preventing the hydrogen concentration from reaching the critical point of flammability and explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the main body of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the transmission pipeline of the present invention;

[0019] Figure 4 It is a structural schematic diagram of the detection module and the exhaust part of the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of the extension part of the present invention;

[0021] Figure 6 It is a schematic cross-sectional view of the seat shell of the present invention;

[0022] Figure 7 It is a structural schematic diagram of the positioning part of the present invention;

[0023] Figure 8 It is a schematic cross-sectional structure diagram of the warning part of the present invention;

[0024] Fig. 9 It is a structural schematic diagram of the exhaust part of the present invention;

[0025] Fig.10 For the present invention Fig. 9 Schematic diagram of the cutaway structure;

[0026] Fig.11 It is a schematic structural diagram of the stopper of the present invention.

[0027] In the figure: 1, main body; 11, seat plate; 12, back plate; 13, sealing cover; 14, sealing door; 15, air outlet; 2, transmission pipeline; 3, hydrogen loading arm; 4, detection module; 41, seat; 411, seat shell; 412, upper opening; 413, lower opening; 42, extension part; 421, ring seat; 422, folding tube; 423, top plate; 424, guide block; 425, slot; 43, tension spring; 44, guide rail; 45, clamping plate; 46, Positioning part; 461, rail frame; 462, rail block; 463, arc strip; 464, plug block; 465, telescopic spring; 466, knock block; 467, metal clicker; 47, warning part; 471, whistle plate; 472, warning whistle; 473, air bag; 5, exhaust part; 51, exhaust pipe; 52, round mouth; 53, ring frame; 54, connecting rod; 55, seat block; 56, contact button; 57, stopper; 58, exhaust fan; 6, hose; 7, guide pipe; 8, fixing frame. DETAILED DESCRIPTION

[0028] See also Figure 1-11 , the present invention provides a technical solution:

[0029] A hydrogen loading skid for leak detection comprises a main body 1, a transmission pipeline 2, a hydrogen loading arm 3, a detection module 4 and an exhaust portion 5. The main body 1 comprises a seat plate 11, a back plate 12 is fixedly connected to the right side of the upper end surface of the seat plate 11, a transmission pipeline 2 is installed on the upper side of the seat plate 11, a hydrogen loading arm 3 is installed on the right side of the back plate 12, and the hydrogen loading arm 3 is connected to the transmission pipeline 2, a sealing cover 13 is fixedly connected to the upper side of the seat plate 11, and the sealing cover 13 is fixedly connected to the back plate 12, an air outlet 15 is opened on the front side of the sealing cover 13, and a detection module 4 is installed at the air outlet 15, and the detection module 4 comprises a seat portion 41, an extension portion 42, a tension spring 43, a guide rail 44, a positioning plate 45, a positioning portion 46 and a warning portion 47, and the seat portion 41 includes a seat shell 411 fixed at the air outlet 15, and the seat shell 411 is connected to the air outlet 15, an upper through hole 412 is opened at the upper shell plate of the seat shell 411, the extension part 42 includes a ring seat 421 located at the lower side of the upper through hole 412, and the ring seat 421 is fixedly connected to the upper inner wall of the seat shell 411, and a folding tube 422 is fixedly connected to the lower inner wall of the ring seat 421, and the upper end of the folding tube 422 passes through the upper through hole 412 and is fixedly connected to a top plate 423, and a slot 425 is opened on the front side of the top plate 423, and the upper end surface of the seat shell 411 is fixedly connected to the guide rails 44 on both sides, and the left and right sides of the top plate 423 are fixedly connected to the guide blocks 424 slidably connected to the guide rails 44, and the front side of the guide rails 44 is fixedly connected to the positioning plate 45, and the slot A positioning portion 46 is installed on the inner side of the groove 425, a warning portion 47 is installed on the upper side of the top plate 423, and a tension spring 43 located on the inner side of the folding tube 422 is fixedly connected to the lower side of the top plate 423, and the lower end of the tension spring 43 is fixedly connected to the lower inner wall of the seat shell 411; the positioning portion 46 includes a rail frame 461 fixed to the inner side of the slot 425, a rail block 462 is slidably connected to the inner side of the rail frame 461, an arc bar 463 is fixedly connected to the rear side of the rail block 462, and both ends of the rear part of the arc bar 463 are fixedly connected to plug blocks 464, and the plug blocks 464 are inserted into the inner side of the slot of the positioning plate 45, a telescopic spring 465 is fixedly connected between the front end surface of the rail block 462 and the front inner wall of the rail frame 461, and a metal alarm is fixedly connected to the rear inner wall of the rail frame 461 The rear side of the arc strip 463 is fixedly connected with a knocking block 466 that fits with the metal clicker 467. Through this arrangement, the positioning portion 46 can cooperate with the positioning plate 45 to locate the height position of the top plate 423, and warn the staff when the top plate 423 moves up; the warning portion 47 includes a sentry plate 471 fixed between a group of guide rails 44, a warning whistle 472 is fixedly connected to the inner side of the middle hole of the sentry plate 471, and an air bag 473 is fixedly connected to the lower side of the sentry plate 471. The lower end surface of the air bag 473 is fixedly connected to the upper end surface of the top plate 423. Through this arrangement, when hydrogen leaks greatly, the top plate 423 will rise rapidly, squeeze the air bag 473, force the gas to pass through the warning whistle 472, and emit a whistle sound to warn the staff;The transmission pipeline 2 is composed of an upper pressure relief pipeline and a lower hydrogen transmission pipeline. The upper pipe of the upper pressure relief pipeline of the transmission pipeline 2 passes through the sealing cover 13, and the left pipe of the lower hydrogen transmission pipeline of the transmission pipeline 2 passes through the sealing cover 13. A sealing door 14 is installed at the front opening of the sealing cover 13. Through this arrangement, the staff can enter the sealing cover 13 to inspect the transmission pipeline 2; the front side of the plate body of the clamping plate 45 is provided with a plurality of slots arranged at equal distances, and the slots of the clamping plate 45 are semicircular grooves. The rear end of the plug block 464 is a semicircular head structure. With this arrangement, the plug block 464 can be pressed out of the slot of the positioning plate 45 when it moves upward, so that the plug block 464 is separated from the slot of the positioning plate 45. The metal clicker 467 is composed of two side connectors and a metal sheet in the middle. There is a gap between the metal sheet of the metal clicker 467 and the rear inner wall of the rail frame 461. With this arrangement, the knocking block 466 knocks the metal clicker 467, which can cause the metal clicker 467 to deform and make a sound. ;

[0030] like Figure 1 , Figure 4-Figure 5 , Figure 9-11As shown, a lower shell plate of the seat shell 411 is provided with a lower opening 413 aligned with the upper opening 412, an exhaust unit 5 is installed inside the lower opening 413, and the exhaust unit 5 includes a discharge pipe 51 slidably connected to the lower opening 413, the upper end of the discharge pipe 51 is fixedly connected to the lower end surface of the top plate 423, a circular opening 52 is provided on the rear side of the discharge pipe 51 below the seat shell 411, a ring frame 53 is fixedly connected to the inner side of the circular opening 52, a connecting rod 54 is symmetrically fixedly connected to the front side of the connecting rod 54, a seat block 55 is fixedly connected to the front end of the connecting rod 54, and The seat block 55 is fixedly connected to the inner wall of the exhaust pipe 51, a contact button 56 is installed on the rear side of the seat block 55, a stopper 57 is sleeved on the outer side of a group of connecting rods 54, an exhaust fan 58 is installed on the inner side of the exhaust pipe 51 at the lower side of the round mouth 52, a hose 6 is connected to the lower side of the exhaust pipe 51, and the other end of the hose 6 is connected to a vertically arranged guide pipe 7, a fixing frame 8 is fixedly connected to the outer side of the guide pipe 7, and the fixing frame 8 is fixed to the front side of the sealing cover 13, through this arrangement, the top plate 423 rises, and the exhaust part 5 will also move up accordingly, once the top plate 423 is raised, the exhaust part 5 will also move up. 23 rises, which indicates that hydrogen leakage has occurred. When the top plate 423 moves to a certain height, the round mouth 52 will enter the seat shell 411 as the top plate 423 rises, so that the gas in the seat shell 411 can push the stopper 57 to move through the round mouth 52 and the ring frame 53, triggering the contact button 56. This action will start the exhaust fan 58, causing the mixed gas containing hydrogen to be sucked into the exhaust pipe 51 through the round mouth 52 and the ring frame 53. Subsequently, the gas is discharged through the hose 6 and the guide pipe 7, completing the exhaust operation; the contact button 56 and the exhaust fan 58 are connected. The fan 58 is electrically connected, and through this setting, the contact button 56 can start the exhaust fan 58. A pinch block is provided on the rear side of the block 57, and the pinch block of the block 57 is on the inner side of the ring frame 53. Through this setting, the staff can move the block 57 to reset it. The block 57 is on the rear side of the contact button 56. Through this setting, the forward movement of the block 57 can squeeze the contact button 56. The diameter of the exhaust pipe 51 is the same as the inner diameter of the lower slide 413. Through this setting, hydrogen leakage from the lower slide 413 can be avoided.

[0031] Workflow: The hydrogen leakage detection operation of the hydrogen loading skid is as follows: Note 1: The left tube of the lower hydrogen transmission pipeline of the transmission pipeline 2 is connected to the external hydrogen storage mechanism, and the lower hydrogen transmission pipeline is used to supply hydrogen to the hydrogen loading arm 3; Note 2: After the valves of the lower hydrogen transmission pipeline of the transmission pipeline 2 are closed, the residual gas can be discharged by the upper pressure relief pipeline after the pressure is increased; Note 3: The electrical appliances in this scheme are all powered by external power; Leak detection operation: When the transmission pipeline 2 leaks during the hydrogen transmission process, hydrogen will leak into the sealing cover 13, and the increase of gas in the sealing cover 13 will allow excess gas to enter the seat shell 411, thereby pushing the folding tube 422 to unfold, resulting in the top When the plate 423 rises, the rise of the top plate 423 will drive the positioning part 46 to move up, so that the plug block 464 of the positioning part 46 is squeezed out of the slot of the positioning plate 45. This action will drive the arc bar 463 to move the knock block 466 and compress the telescopic spring 465. When the positioning part 46 moves up to the upper slot of the positioning plate 45, the telescopic spring 465 will cooperate with the rail block 462 to reset the arc bar 463, the plug block 464 and the knock block 466, so that the plug block 464 is inserted into the upper slot, and the reset of the knock block 466 will knock the metal clicker 467 to issue a warning sound. Each time the top plate 423 rises, the plug block 464 will be inserted into the upper slot, and this process will be repeated. The warning process is suitable for small hydrogen leaks; in the case of a large leak, the top plate 423 will rise rapidly, squeezing the airbag 473, forcing the gas to pass through the warning whistle 472 and emit a whistle. The leak detection operation is completed through the above steps, and the hydrogen loading skid can perform comprehensive and effective hydrogen leak detection on the transmission pipeline 2 with a wide coverage and complex structure, and provide multi-mode early warning to the staff; exhaust operation: when a hydrogen leak occurs, in order to prevent the hydrogen concentration from rising to a dangerous level that is flammable and explosive, the exhaust will be automatically performed. As the top plate 423 rises, the exhaust part 5 will also move up. Once the top plate 423 rises, this It indicates that hydrogen leakage has occurred. When the top plate 423 moves to a certain height, the circular opening 52 will enter the interior of the seat shell 411 as the top plate 423 rises, so that the gas in the seat shell 411 can push the stopper 57 to move through the circular opening 52 and the ring frame 53, triggering the contact button 56. This action will start the exhaust fan 58, causing the mixed gas containing hydrogen to be sucked into the exhaust pipe 51 through the circular opening 52 and the ring frame 53. Subsequently, the gas is discharged through the hose 6 and the guide pipe 7, completing the exhaust operation. This automated exhaust mechanism ensures that the hydrogen loading skid can discharge the leaked hydrogen in time, effectively preventing the hydrogen concentration from reaching the critical point of flammability and explosion.

[0032] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above are only preferred implementation methods of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A hydrogen loading skid for leak detection, comprising a main body (1), a transmission pipeline (2), a hydrogen loading arm (3), a detection module (4) and an exhaust part (5), characterized in that: The main body (1) comprises a seat plate (11), the upper end surface of the seat plate (11) is fixedly connected to a back plate (12) on the right side, a transmission pipeline (2) is installed on the upper side of the seat plate (11), a hydrogen loading arm (3) is installed on the right side of the back plate (12), and the hydrogen loading arm (3) is connected to the transmission pipeline (2), the upper side of the seat plate (11) is fixedly connected to a sealing cover (13), and the sealing cover (13) is fixedly connected to the back plate (12), and a gas outlet is opened on the front side of the sealing cover (13). (15), a detection module (4) is installed at the air outlet (15), the detection module (4) comprises a seat portion (41), an extension portion (42), a tension spring (43), a guide rail (44), a positioning plate (45), a positioning portion (46) and a warning portion (47), the seat portion (41) comprises a seat shell (411) fixed at the air outlet (15), and the seat shell (411) is connected to the air outlet (15), an upper through hole (412) is opened on the upper shell plate of the seat shell (411), the extension portion (42), a tension spring (43), a guide rail (44), a positioning plate (45), a positioning portion (46) and a warning portion (47), the seat portion (41) comprises a seat shell (411) fixed at the air outlet (15), and the seat shell (411) is connected to the air outlet (15), and an upper through hole (412) is opened on the upper shell plate of the seat shell (411), The part (42) comprises a ring seat (421) located at the lower side of the upper opening (412), and the ring seat (421) is fixedly connected to the upper inner wall of the seat shell (411), the lower inner wall of the ring seat (421) is fixedly connected to a folding tube (422), the upper end of the folding tube (422) passes through the upper opening (412) and is fixedly connected to a top plate (423), a slot (425) is provided on the front side of the top plate (423), both sides of the upper end surface of the seat shell (411) are fixedly connected to guide rails (44), and the top plate (4 The left and right sides of the guide rail (44) are fixedly connected with guide blocks (424) that are slidably connected to the guide rail (44), the front side of the guide rail (44) is fixedly connected with a positioning plate (45), the inner side of the slot (425) is installed with a positioning portion (46), the upper side of the top plate (423) is installed with a warning portion (47), the lower side of the top plate (423) is fixedly connected with a tension spring (43) located inside the folding tube (422), and the lower end of the tension spring (43) is fixedly connected to the lower inner wall of the seat shell (411).

2. The hydrogen loading skid for leak detection according to claim 1, characterized in that: The positioning portion (46) comprises a rail frame (461) fixed on the inner side of the slot (425); a rail block (462) is slidably connected to the inner side of the rail frame (461); an arc bar (463) is fixedly connected to the rear side of the rail block (462); both ends of the rear part of the arc bar (463) are fixedly connected to plug blocks (464), and the plug blocks (464) are inserted into the inner side of the slot of the positioning plate (45); a telescopic spring (465) is fixedly connected between the front end surface of the rail block (462) and the front inner wall of the rail frame (461); a metal clicker (467) is fixedly connected to the rear inner wall of the rail frame (461); and a knocking block (466) that fits the metal clicker (467) is fixedly connected to the rear side of the arc bar (463).

3. The hydrogen loading skid for leak detection according to claim 2, characterized in that: The warning portion (47) comprises a whistle plate (471) fixed between a group of guide rails (44); a warning whistle (472) is fixedly connected to the inner side of a center hole of the whistle plate (471); an air bag (473) is fixedly connected to the lower side of the whistle plate (471); and a lower end surface of the air bag (473) is fixedly connected to an upper end surface of a top plate (423).

4. The hydrogen loading skid for leak detection according to claim 3 is characterized by: The transmission pipeline (2) is composed of an upper pressure relief pipeline and a lower hydrogen transmission pipeline. The upper pipe of the upper pressure relief pipeline of the transmission pipeline (2) passes through a sealed cover (13), and the left pipe of the lower hydrogen transmission pipeline of the transmission pipeline (2) passes through the sealed cover (13). A sealed door (14) is installed at the front opening of the sealed cover (13).

5. The hydrogen loading skid for leak detection according to claim 3, characterized in that: The front side of the plate body of the locking plate (45) is provided with a plurality of slots arranged at equal distances, the slots of the locking plate (45) are semicircular slot structures, the rear end of the plug block (464) is a semicircular head structure, the metal clicker (467) is composed of two side connecting pieces and a metal sheet in the middle, and a distance is left between the metal sheet of the metal clicker (467) and the rear inner wall of the rail frame (461).

6. The hydrogen loading skid for leak detection according to claim 3, characterized in that: A lower lower opening (413) aligned with the upper opening (412) is provided on the lower shell plate of the seat shell (411), an exhaust unit (5) is installed inside the lower lower opening (413), the exhaust unit (5) comprises a discharge pipe (51) slidably connected to the lower lower opening (413), the upper end of the discharge pipe (51) is fixedly connected to the lower end surface of the top plate (423), a circular opening (52) located below the seat shell (411) is provided on the rear side of the discharge pipe (51), a ring frame (53) is fixedly connected to the inner side of the circular opening (52), a connecting rod (54) is symmetrically fixedly connected to the front side of the ring frame (53), and the connecting rod (54) is fixedly connected to the front side of the ring frame (53). 4), a seat block (55) is fixedly connected to the front end thereof, and the seat block (55) is fixedly connected to the inner wall of the exhaust pipe (51), a contact button (56) is installed on the rear side of the seat block (55), a stopper (57) is sleeved on the outer side of a group of the connecting rods (54), an exhaust fan (58) located at the lower side of the circular opening (52) is installed on the inner side of the exhaust pipe (51), a hose (6) is connected to the lower side of the exhaust pipe (51), the other end of the hose (6) is connected to a vertically arranged guide pipe (7), a fixing frame (8) is fixedly connected to the outer side of the guide pipe (7), and the fixing frame (8) is fixed to the front side of the sealing cover shell (13).

7. The hydrogen loading skid for leak detection according to claim 6, characterized in that: The contact button (56) is electrically connected to the exhaust fan (58), a pinch block is provided on the rear side of the stopper (57), the pinch block of the stopper (57) is located on the inner side of the ring frame (53), the stopper (57) is located on the rear side of the contact button (56), and the diameter of the exhaust pipe (51) is the same as the inner diameter of the lower sliding opening (413).

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