Hydrogen pipeline quick-connect flange

Abstract

The utility model discloses a kind of hydrogen pipeline quick connection flanges, belong to pipeline connection technical field, including pipeline one, pipeline two and quick connection mechanism and protection mechanism, pipeline two right side upper and lower end fixed connection positioning block, pipeline one left side upper and lower end is equipped with positioning slot, pipeline one outer wall front and back side fixed connection connecting block, U-shaped block rotation is set in connecting block, U-shaped block inboard fixed connection rotating shaft, hollow block outer wall right side rotatably connected in rotating shaft outer wall, L-shaped block fixed connection is in pipeline two front and back side, hollow block is used for to fit L-shaped block, U-shaped block and hollow block are all equipped with round groove one on, bolt one is set on round groove one top, for inserting and locking U-shaped block and hollow block, sealing ring is installed in pipeline one left end.The utility model has realized the quick, reliable connection of hydrogen pipeline, effectively prevent hydrogen leakage, simultaneously comprehensive protection connection mechanism, reduce component abrasion and sealing failure risk, prolong service life.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection technology, and in particular to a quick-connect flange for hydrogen pipelines. Background Technology

[0002] Hydrogen, as a clean and efficient energy carrier, is increasingly widely used in industrial production and energy utilization. During the transportation process, hydrogen needs to be transported over long distances through pipelines, and the connection between pipelines is a key link in the safe and efficient transportation of hydrogen.

[0003] Existing hydrogen pipeline connections generally use traditional flange bolt connections or welding methods. Traditional flange bolt connections require precise hole alignment, gasket installation, and tightening of a large number of bolts. The operation process is cumbersome and time-consuming, and requires a high level of professional skills from construction personnel. In emergency situations or scenarios that require frequent disassembly and assembly, the connection efficiency is obviously insufficient.

[0004] In practice, this connection method makes it difficult to uniformly control the preload of the connecting bolts. Loose bolts or improper installation will directly lead to uneven stress on the sealing gasket, resulting in poor sealing and a safety hazard of hydrogen leakage. As a flammable and explosive gas, even a small leak of hydrogen can have serious consequences. In addition, existing connection mechanisms lack effective external protection for connecting parts and seals when used for a long time or exposed to harsh environments. Dust, impurities, and moisture can penetrate the sealing surface and locking components, accelerating wear and corrosion of parts, ultimately leading to connection or seal failure. This greatly increases maintenance costs and safety risks, and shortens the service life of pipeline connection devices.

[0005] Therefore, this utility model proposes a quick-connect flange for hydrogen pipelines to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems of low connection efficiency, poor sealing, and susceptibility to component wear and sealing failure caused by external environmental factors in the existing quick-connect flanges for hydrogen pipelines, this utility model aims to provide a hydrogen pipeline quick-connect flange with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a quick-connect flange for hydrogen pipelines, comprising: a first pipeline and a second pipeline connected to each other, a quick-connect mechanism and a protective mechanism, wherein the quick-connect mechanism includes a sealing ring.

[0008] The pipe 2 has a fixed positioning block at the upper and lower right sides, and a positioning groove that mates with the positioning block is provided at the upper and lower left sides of the pipe 1. The pipe 1 has a fixed connecting block at the front and rear sides of its outer wall, a U-shaped block that is rotatably set inside the connecting block, a rotating shaft that is fixedly connected to the inner side of the U-shaped block, a hollow block that is rotatably connected to the outer wall of the rotating shaft on its right side, an L-shaped block that is fixedly connected to the front and rear sides of the pipe 2, and a hollow block that fits into the L-shaped block. Both the U-shaped block and the hollow block have a circular groove, and a pin is provided above the circular groove to insert and lock the U-shaped block and the hollow block when the circular grooves are aligned. The protective mechanism includes a fixing block, which is fixedly connected to the outer wall of the pipe 1. A corrugated pipe is installed on the left side of the outer wall of the fixing block. The fixing block 2 is fixedly connected to the outer wall of the pipe 2. The fixing block 2 has a groove on the right side of its outer wall that mates with the end of the corrugated pipe. The fixing block 2 and the corrugated pipe have circular grooves at the front and rear ends on the left side of their outer walls. A pin is provided outside the circular grooves to insert and fix the end of the corrugated pipe when the circular grooves are aligned.

[0009] Furthermore, pipe one, pipe two, and the sealing ring are combined by end face compression sealing; positioning blocks and positioning grooves are combined by limiting fit; connecting blocks, U-shaped blocks, rotating shafts, hollow blocks, L-shaped blocks, round groove one, and pin one are combined by rotation, fitting, and pin locking; and fixing blocks one, bellows, fixing blocks two, grooves, round groove two, and pin two are combined by wrapping, snapping, and pin fixing.

[0010] Preferably, the sealing ring is an O-ring, which is elastically fitted on the left end face of the pipe to prevent hydrogen leakage.

[0011] Preferably, the positioning block is a rectangular protrusion and the positioning groove is a rectangular groove, with the positioning block and the positioning groove engaging in a limiting fit.

[0012] Preferably, the connecting block has a space inside to accommodate the rotation of the U-shaped block, and the U-shaped block is rotatably connected to the connecting block by a pin.

[0013] Preferably, the hollow block has an L-shaped insertion port inside, and the hollow block is rotatably connected to the shaft through a bearing structure on the outer wall.

[0014] Preferably, the L-shaped block has an L-shaped structure with a lateral extension, which is used to fit into the internal cavity of the hollow block.

[0015] Preferably, the first pin is a cylindrical pin, which is vertically inserted into the aligned circular groove.

[0016] Preferably, the corrugated pipe is a retractable metal corrugated pipe, and the outer side of the corrugated pipe is fixedly connected to the annular groove of the fixing block.

[0017] Preferably, the groove is an annular groove, and the shape of the groove matches the shape of the end of the bellows.

[0018] Preferably, the second pin is a cylindrical pin, which is radially inserted into the aligned circular groove.

[0019] This utility model has the following beneficial effects:

[0020] 1. This utility model achieves initial alignment of the pipeline by setting positioning blocks and positioning grooves, and then uses a rotational tensioning mechanism composed of U-shaped blocks, hollow blocks, rotating shafts and L-shaped blocks, as well as a locking pin, supplemented by a sealing ring, to solve the problems of low pipeline connection efficiency and poor sealing in the prior art, thereby achieving fast and reliable connection of hydrogen pipelines and effectively preventing hydrogen leakage.

[0021] 2. This utility model solves the problem in the prior art that the connection mechanism is easily affected by the external environment, leading to component wear and sealing failure. It effectively blocks dust, impurities and moisture from entering the sealing surface and locking components, reduces the risk of component wear and sealing failure, and extends the service life of the connection device. Attached Figure Description

[0022] Figure 1 This is a perspective view of a quick-connect flange for hydrogen pipelines proposed in this utility model.

[0023] Figure 2 This is a structural exploded view of a quick-connect flange for hydrogen pipelines proposed in this utility model;

[0024] Figure 3 This is a partial structural exploded view of a quick-connect flange for hydrogen pipelines proposed in this utility model;

[0025] Figure 4 for Figure 4 Enlarged view of point A in the middle;

[0026] Figure 5 This is a partial exploded view of the structure of a quick-connect flange for hydrogen pipelines proposed in this utility model.

[0027] Legend:

[0028] 1. Pipe 1; 2. Pipe 2; 3. Quick connection mechanism; 301. Sealing ring; 302. Positioning block; 303. Positioning groove; 304. Connecting block; 305. U-shaped block; 306. Rotating shaft; 307. Hollow block; 308. L-shaped block; 309. Circular groove 1; 310. Pin 1; 4. Protective mechanism; 401. Fixing block 1; 402. Corrugated pipe; 403. Fixing block 2; 404. Groove; 405. Circular groove 2; 406. Pin 2. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] Example:

[0031] Please refer to Figures 1 to 5 This utility model provides a quick-connect flange for hydrogen pipelines, including a first pipeline 1 and a second pipeline 2. The first pipeline 1 and the second pipeline 2 serve as the basic carriers for transporting hydrogen and are used to realize the flow of pipeline media. The first pipeline 1 and the second pipeline 2 are connected by a quick-connect mechanism 3, which is used to realize the quick docking and fixation of the first pipeline 1 and the second pipeline 2. A protective mechanism 4 is provided outside the connection area of ​​the first pipeline 1 and the second pipeline 2. The protective mechanism 4 is used to provide external protection for the quick-connect mechanism 3. A sealing ring 301 is provided at the connection between the first pipeline 1 and the second pipeline 2. The sealing ring 301 is used to seal the connection between the first pipeline 1 and the second pipeline 2 to prevent hydrogen leakage.

[0032] Specifically, positioning blocks 302 are fixedly connected to the upper and lower right ends of pipe 2. Positioning blocks 302 are rectangular protrusions. Positioning grooves 303 are provided at the upper and lower left ends of pipe 1 to cooperate with positioning blocks 302. Positioning grooves 303 are rectangular grooves. A limiting fit is formed between positioning blocks 302 and positioning grooves 303 for the initial positioning of pipe 1 and pipe 2. Connecting blocks 304 are fixedly connected to the front and rear sides of the outer wall of pipe 1. The interior of connecting blocks 304 forms a space to accommodate the rotation of U-shaped blocks 305. U-shaped blocks 305 are rotatably set in the connecting blocks 304. U-shaped blocks 305 are rotatably connected to connecting blocks 304 through pins. A rotating shaft 306 is fixedly connected to the inner side of U-shaped blocks 305. Hollow block 3 The outer right side of the outer wall of 07 is rotatably connected to the outer wall of the rotating shaft 306. The hollow block 307 is rotatably connected to the rotating shaft 306 through the bearing structure on the outer wall. The L-shaped block 308 is fixedly connected to the front and rear sides of the second pipe 2. The L-shaped block 308 has an L-shaped structure with a lateral extension. The hollow block 307 forms an insertion port for the L-shaped block 308. The hollow block 307 is used to fit the L-shaped block 308. The U-shaped block 305 and the hollow block 307 are both provided with a circular groove 309. The circular groove 309 is in the shape of a circular hole. The pin 310 is set above the circular groove 309. The pin 310 is in the shape of a cylindrical pin and is used to vertically insert and lock the U-shaped block 305 and the hollow block 307 when the circular groove 309 is aligned.

[0033] The protective mechanism 4 includes a fixing block 401, which is fixedly connected to the outer wall of pipe 1. A corrugated pipe 402 is installed on the left side of the outer wall of fixing block 401. The corrugated pipe 402 is a retractable metal corrugated tube and is fixedly connected to the annular groove of fixing block 401 on the outside. A fixing block 403 is fixedly connected to the outer wall of pipe 2. A groove 404 is provided on the right side of the outer wall of fixing block 403 to match the end of the corrugated pipe 402. The groove 404 is an annular groove and its shape matches the shape of the end of the corrugated pipe 402. Circular grooves 405 are provided on the front and rear ends of the left side of the outer wall of fixing block 403 and the outer wall of corrugated pipe 402. Circular grooves 405 are circular holes. A pin 406 is provided outside the circular grooves 405. The pin 406 is a cylindrical pin and is used to radially insert and fix the end of the corrugated pipe 402 when the circular grooves 405 are aligned.

[0034] Please refer to Figure 2 , Figure 3 and Figure 4 Positioning blocks 302 are fixedly connected to the upper and lower right ends of pipe 2. The positioning blocks 302 are rectangular protrusions and are fixed to the outer wall of pipe 2 by welding or bolting. Positioning grooves 303 that cooperate with positioning blocks 302 are opened at the upper and lower left ends of pipe 1. The positioning grooves 303 are rectangular grooves and are integrally formed with the body of pipe 1. The positioning blocks 302 and the positioning grooves 303 form a limiting fit. When pipe 2 is close to pipe 1, the positioning blocks 302 can be accurately inserted into the positioning grooves 303 to initially position pipe 1 and pipe 2, ensuring the accuracy of subsequent connection.

[0035] Connecting blocks 304 are fixedly connected to the front and rear sides of the outer wall of pipe 1. Connecting blocks 304 are fixed to the outer wall of pipe 1 by welding or bolting. The interior of connecting blocks 304 forms a space to accommodate the rotation of a U-shaped block 305. The U-shaped block 305 is rotatably disposed within the connecting blocks 304. The U-shaped block 305 is rotatably connected to the connecting blocks 304 by a pin. The pin passes through the side wall of the U-shaped block 305 and is fixed in the corresponding hole of the connecting block 304. A rotating shaft 306 is fixedly connected to the inner side of the U-shaped block 305. The rotating shaft 306 is fixed to the inner wall of the U-shaped block 305 by pressing or welding. The axis of the rotating shaft 306 is perpendicular to the rotation axis of the U-shaped block 305. The right side of the outer wall of a hollow block 307 is rotatably connected to the outer wall of the rotating shaft 306. The hollow block 307... The bearing structure on the outer wall, such as a needle roller bearing or a sliding bearing, forms a low-friction rotational connection with the rotating shaft 306. The L-shaped block 308 is fixedly connected to the front and rear sides of the second pipe 2. The L-shaped block 308 has an L-shaped structure with a lateral extension and is fixed to the outer wall of the second pipe 2 by welding or bolting. The lateral extension faces the first pipe 1. The hollow block 307 forms an insertion port for the L-shaped block 308. The hollow block 307 is used to fit the L-shaped block 308. After the hollow block 307 fits the L-shaped block 308, the U-shaped block 305 is rotated. The U-shaped block 305 will drive the hollow block 307 to rotate on the rotating shaft 306, thereby pulling the L-shaped block 308 towards the first pipe 1, realizing a tight connection between the second pipe 2 and the first pipe 1, and ensuring the firmness of the connection.

[0036] To lock the relative positions of the U-shaped block 305 and the hollow block 307, a circular groove 309 is provided on both the U-shaped block 305 and the hollow block 307. The circular groove 309 is a circular hole. When the L-shaped block 308 is pulled into place by the hollow block 307, the circular groove 309 on the U-shaped block 305 and the circular groove 309 on the hollow block 307 are aligned with each other. A pin 310 is set above the circular groove 309. The pin 310 is a cylindrical pin. The pin 310 can be inserted vertically into the aligned circular groove 309 to achieve a pin-type locking between the U-shaped block 305 and the hollow block 307, preventing the connection mechanism from accidentally loosening during operation and ensuring the stability of the connection.

[0037] For the quick-connect mechanism 3, the connection operation is completed manually. After the connection is completed, it is automatically locked. When disassembling, it can be quickly separated by pulling out the pin 310.

[0038] As a preferred embodiment, in order to ensure the tightness of the hydrogen connection and prevent media leakage, the sealing ring 301 is an O-ring. The sealing ring 301 is made of an elastic material that is resistant to hydrogen corrosion, such as fluororubber or polytetrafluoroethylene. The sealing ring 301 fits elastically in the annular groove formed on the left end face of pipe 1. When pipe 1 and pipe 2 are connected, the sealing ring 301 is compressed between the two end faces, filling the tiny gaps on the end faces and forming a reliable seal.

[0039] As a preferred embodiment, in order to achieve accurate and rapid alignment and initial fixation of the pipe, the positioning block 302 is a rectangular protrusion, which is firmly fixed to the upper and lower right sides of the second pipe 2 by welding. The positioning groove 303 is a rectangular groove, which is formed on the upper and lower left sides of the first pipe 1 by machining. The positioning block 302 and the positioning groove 303 form a sliding limiting fit, which guides the second pipe 2 to be accurately inserted into place during the connection process.

[0040] In a preferred embodiment, in order to achieve stable rotation of the U-shaped block 305 and effectively tighten the L-shaped block 308, a U-shaped groove cavity is formed inside the connecting block 304. The U-shaped block 305 is rotatably disposed in the U-shaped groove cavity of the connecting block 304. The U-shaped block 305 is rotatably connected to the connecting block 304 by a pin that passes through the two side walls of the U-shaped block 305 and is fixed on the connecting block 304. The pin is made of high-strength alloy steel to ensure the reliability and load-bearing capacity of the rotatable connection.

[0041] In a preferred embodiment, in order to ensure the smooth rotation of the hollow block 307 on the rotating shaft 306 and to effectively transmit the tension force, an insertion port matching the size of the lateral extension of the L-shaped block 308 is formed inside the hollow block 307. The hollow block 307 is connected to the rotating shaft 306 with low friction through a rolling bearing on its outer wall. The rolling bearing is made of stainless steel to adapt to the hydrogen environment and provide durable rotational performance.

[0042] As a preferred embodiment, in order to provide a reliable tensioning force point, the L-shaped block 308 is an L-shaped structure with a lateral extension. The L-shaped block 308 is fixedly connected to the front and rear sides of the second pipe 2 by bolts. The lateral extension protrudes outward to form a protruding part that can fit into the insertion port of the hollow block 307, ensuring that the hollow block 307 can effectively tension the L-shaped block 308.

[0043] As a preferred embodiment, in order to reliably lock the U-shaped block 305 and the hollow block 307, the first pin 310 is a cylindrical pin. The first pin 310 is made of stainless steel and its diameter is tightly fitted with the inner diameter of the circular groove 309. The first pin 310 is inserted vertically from the top of the circular groove 309. The end of the first pin 310 can be designed to be tapered for easy insertion and is provided with a ring handle for convenient manual operation.

[0044] As a preferred embodiment, in order to effectively protect the quick-connect mechanism 3 and adapt to dimensional changes after pipe connection, the corrugated pipe 402 is a telescopic metal pipe. The corrugated pipe 402 is made of corrosion-resistant and highly elastic stainless steel material. The outer side is firmly connected to the annular groove of the fixing block 401 by welding. The annular groove of the fixing block 401 forms an embedded installation structure to ensure the sealing of the corrugated pipe 402 connection.

[0045] In a preferred embodiment, in order to reliably fix the end of the bellows 402, the groove 404 is an annular groove. The groove 404 is formed on the right side of the outer wall of the fixing block 403 by machining. The shape of the groove 404 precisely matches the shape of the end of the bellows 402, forming a locking and positioning structure. The depth and width of the groove 404 are sufficient to stably accommodate the end of the bellows 402.

[0046] In a preferred embodiment, in order to lock the end of the bellows 402 in the groove 404, the second pin 406 is a cylindrical pin made of stainless steel, and its diameter is tightly fitted with the inner diameter of the second groove 405. The second pin 406 is inserted radially from the outside of the second groove 405.

[0047] Working principle: When pipe 1 and pipe 2 need to be connected, pipe 2, which is located on the left side of pipe 1, is brought close to pipe 1. Since the positioning block 302 is fixedly connected to the upper and lower right ends of pipe 2, and the upper and lower left ends of pipe 1 also have positioning grooves 303 that match the positioning block 302, as pipe 2 is brought close to pipe 1, the positioning block 302 will precisely embed into the positioning groove 303, thereby initially positioning pipe 1 and pipe 2 to ensure alignment. After the initial positioning is completed, the connecting block 304 is fixedly connected to the front and rear sides of the outer wall of pipe 1, and the U-shaped block 305 is rotatably set in the connecting block 304. The inner side of the U-shaped block 305 is fixed. Connect the rotating shaft 306. The outer right side of the hollow block 307 is rotatably connected to the outer wall of the rotating shaft 306. The L-shaped block 308 is fixedly connected to the front and rear sides of the second pipe 2. At this time, first, put the hollow block 307 on the L-shaped block 308, ensuring that the lateral extension of the L-shaped block 308 enters the insertion port of the hollow block 307. Then press the U-shaped block 305, so that the U-shaped block 305 rotates in the connecting block 304, while driving the hollow block 307 to rotate on the rotating shaft 306 inside the U-shaped block 305. The rotation of the hollow block 307 will cause the hollow block 307 to pull the L-shaped block 308 on the second pipe 2 towards the first pipe 1, so that the first pipe 1 and the second pipe 2 fit tightly together.

[0048] When connecting pipe 1 and pipe 2, a sealing ring 301 is installed on the left end of pipe 1. The sealing ring 301 can fill the tiny gap between the two pipe end faces, effectively preventing hydrogen permeation and leakage, and ensuring the sealing of the connection. When the tightening operation is in place, the circular groove 309 on the U-shaped block 305 is aligned with the circular groove 309 on the hollow block 307. The pin 310 is set above the circular groove 309. At this time, the pin 310 is vertically inserted into the aligned circular groove 309. The insertion of the pin 310 locks the relative position of the U-shaped block 305 and the hollow block 307, preventing the U-shaped block 305 from rotating in the opposite direction and causing the connection to loosen. Through the quick connection mechanism 3 between pipe 1 and pipe 2, a quick and reliable connection between pipe 1 and pipe 2 is achieved.

[0049] After pipe 1 and pipe 2 are connected and locked, the quick-connect mechanism 3 needs to be protected. Fixing block 1 401 is fixedly connected to the outer wall of pipe 1. A corrugated pipe 402 is installed on the left side of the outer wall of fixing block 1 401. The corrugated pipe 402 is extendable. Pulling the corrugated pipe 402 extends it, completely covering the quick-connect mechanism 3 between pipe 1 and pipe 2. Fixing block 2 403 is fixedly connected to the outer wall of pipe 2. A groove 404 is provided on the right side of the outer wall of fixing block 2 403, matching the end of the corrugated pipe 402. The groove 404 can accommodate the end of the corrugated pipe 402, thus initially positioning the corrugated pipe 402. Simultaneously, due to the... Both the outer wall of pipe 03 and the left front and rear ends of the outer wall of corrugated pipe 402 are provided with circular grooves 405. Pins 406 are set outside the circular grooves 405. When the end of corrugated pipe 402 is placed into the groove 404, the circular grooves 405 on the outer wall of corrugated pipe 402 are aligned with the circular grooves 405 on the fixing block 403. Then, pins 406 are inserted radially into the circular grooves 405, thereby fixing the end of corrugated pipe 402 to the fixing block 403. The corrugated pipe 402 completely covers the quick connection mechanism 3 through the protective mechanism 4 between pipe 1 and pipe 2, which can completely block dust, impurities and moisture from entering the sealing surface and locking components, reduce the risk of component wear and sealing failure, and improve the long-term reliability and safety of the connection.

Claims

1. A quick-connect flange for hydrogen pipelines, comprising: The interconnected pipes are pipe 1 (1), pipe 2 (2), quick connection mechanism (3), and protective mechanism (4), wherein the quick connection mechanism (3) includes a sealing ring (301). Its features are, The upper and lower ends of the right side of the second pipe (2) are fixedly connected to the positioning block (302), the upper and lower ends of the left side of the first pipe (1) are provided with positioning grooves (303), the outer wall of the first pipe (1) is fixedly connected to the connecting block (304), the U-shaped block (305) is rotatably set in the connecting block (304), the inner side of the U-shaped block (305) is fixedly connected to the rotating shaft (306), the right side of the outer wall of the hollow block (307) is rotatably connected to the outer wall of the rotating shaft (306), the L-shaped block (308) is fixedly connected to the outer side of the second pipe (2), the U-shaped block (305) is provided with a circular groove (309), and the pin (310) is set above the circular groove (309); Fixed block one (401) is fixedly connected to the outer wall of pipe one (1). A corrugated pipe (402) is installed on the left side of the outer wall of fixed block one (401). Fixed block two (403) is fixedly connected to the outer wall of pipe two (2). A groove (404) is provided on the right side of the outer wall of fixed block two (403). Circular groove two (405) is provided on the front and rear ends of the left side of the outer wall of fixed block two (403) and the outer wall of corrugated pipe (402). Pin two (406) is provided outside the circular groove two (405).

2. The quick-connect flange for hydrogen pipelines according to claim 1, characterized in that, The sealing ring (301) is an O-ring that fits elastically on the left end face of pipe (1) to prevent hydrogen leakage.

3. The quick-connect flange for hydrogen pipelines according to claim 1, characterized in that, The positioning block (302) is a rectangular protrusion, and the positioning groove (303) is a rectangular groove. The positioning block (302) and the positioning groove (303) are in a limiting fit.

4. The quick-connect flange for hydrogen pipelines according to claim 1, characterized in that, The connecting block (304) forms a space inside to accommodate the rotation of the U-shaped block (305), and the U-shaped block (305) is rotatably connected to the connecting block (304) through a pin.

5. A quick-connect flange for hydrogen pipelines according to claim 1, characterized in that, The hollow block (307) forms an insertion port for an L-shaped block (308) inside, and the hollow block (307) is rotatably connected to the rotating shaft (306) through a bearing structure on its outer wall.

6. A quick-connect flange for hydrogen pipelines according to claim 1, characterized in that, The L-shaped block (308) is an L-shaped structure with a lateral extension, which is used to fit with the internal cavity of the hollow block (307).

7. A quick-connect flange for hydrogen pipelines according to claim 1, characterized in that, The first pin (310) is a cylindrical pin that is vertically inserted into the aligned circular groove (309).

8. A quick-connect flange for hydrogen pipelines according to claim 1, characterized in that, The corrugated pipe (402) is a retractable metal pipe, and its outer side is fixedly connected to the annular groove of the fixing block (401).

9. A quick-connect flange for hydrogen pipelines according to claim 1, characterized in that, The groove (404) is annular and its shape matches the end shape of the bellows (402).

10. A quick-connect flange for hydrogen pipelines according to claim 1, characterized in that, The second pin (406) is a cylindrical pin that is radially inserted into the aligned circular groove (405).

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