Sealing connection structure of hydrogen conveying pipe fitting

Abstract

The utility model relates to the field of hydrogen conveying pipes, and discloses a hydrogen conveying pipe fitting sealing connection structure which comprises two sections of hydrogen conveying pipe bodies, the two sections of hydrogen conveying pipe bodies are connected through a flange, and a first sealing sleeve and a second sealing sleeve are respectively sleeved on the two sections of hydrogen conveying pipe bodies in a sliding mode. The first sealing sleeve and the second sealing sleeve are respectively provided with a via hole matched with the hydrogen conveying pipe body, one end of the second sealing sleeve is provided with a sealing slot matched with the first sealing sleeve, and the two sections of hydrogen conveying pipe bodies are respectively provided with a fixing mechanism matched with the first sealing sleeve and the second sealing sleeve; one end of the first sealing sleeve is fixedly connected with a gas collecting port, one side of the gas collecting port is fixedly connected with a U-shaped gas collecting pipe, and the other end of the U-shaped gas collecting pipe is fixedly connected with a gas collecting tank. Compared with the prior art, the pipeline connecting device has the advantages that the pipeline connecting position can be further connected in a sealed mode, and leaked hydrogen can be rapidly collected.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen transmission pipe technology, specifically to a sealing connection structure for hydrogen transmission pipe fittings. Background Technology

[0002] In hydrogen production and use, hydrogen is transported through hydrogen pipelines. Due to the long length of these pipelines, adjacent pipelines are typically sealed with flanges and sealing rings. This simple sealing structure results in poor sealing performance, making it easy for hydrogen to leak at the pipeline connections. Furthermore, since hydrogen is a flammable and explosive gas, it is difficult to collect leaked hydrogen, significantly impacting safety. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the above-mentioned technical difficulties and provide a sealing connection structure for hydrogen transmission pipe fittings, which can further seal the pipe connection and quickly collect leaked hydrogen.

[0004] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a sealing connection structure for hydrogen delivery pipe fittings, comprising two sections of hydrogen delivery pipe body, which are connected by a flange. A first sealing sleeve and a second sealing sleeve are slidably fitted onto each of the two sections of hydrogen delivery pipe body. Both the first and second sealing sleeves are provided with through holes that cooperate with the hydrogen delivery pipe body. One end of the second sealing sleeve is provided with a sealing slot that cooperates with the first sealing sleeve. The two sections of hydrogen delivery pipe body are respectively provided with fixing mechanisms that cooperate with the first and second sealing sleeves. A gas collecting port is fixedly connected to one end of the first sealing sleeve. A U-shaped gas collecting pipe is fixedly connected to one side of the gas collecting port. A gas collecting tank is fixedly connected to the other end of the U-shaped gas collecting pipe. A one-way valve mechanism is provided on the side of the gas collecting port of the U-shaped gas collecting pipe.

[0005] As an improvement, one end of the first sealing sleeve is provided with an annular groove, a sealing airbag is inserted into the annular groove, an inflation tube extending to one end of the first sealing sleeve is fixedly connected to one side of the sealing airbag, and a sealing valve is fixedly connected to the end of the inflation tube.

[0006] As an improvement, the fixing mechanism includes a threaded sleeve threaded to the outer wall of the two sections of the hydrogen delivery pipe, and the outer wall of the threaded sleeve is fixedly connected with evenly distributed adjustment handles.

[0007] As an improvement, both sections of the hydrogen delivery pipe are fitted with sealing rings that mate with the through holes.

[0008] As an improvement, the one-way valve mechanism includes a telescopic sleeve fixedly connected to the U-shaped gas collecting pipe on one side of the gas collecting port. A movable rod is slidably inserted into the telescopic sleeve. A sealing spring that cooperates with the movable rod is fixedly connected inside the telescopic sleeve. A sealing ball that cooperates with the gas collecting port is fixedly connected to the end of the movable rod away from the sealing spring.

[0009] As an improvement, a pressure sensor is installed inside the gas collection tank.

[0010] The advantages of this utility model compared with the prior art are: the first sealing sleeve and the second sealing sleeve on both sides are interlocked to form a sealing cover to further seal the connection of the pipeline. When the pipeline leaks, it is collected through the gas collection pipe to prevent hydrogen leakage from causing danger. Attached Figure Description

[0011] Figure 1 This is an exploded view of a sealing connection structure for a hydrogen delivery pipe fitting according to this utility model.

[0012] Figure 2 This is a schematic diagram of a sealing connection structure for a hydrogen delivery pipe fitting according to this utility model.

[0013] Figure 3 This is a cross-sectional view of a sealing connection structure for a hydrogen delivery pipe fitting according to this utility model.

[0014] Figure 4 This is an enlarged view of section A of the sealing connection structure of a hydrogen conveying pipe fitting according to this utility model.

[0015] As shown in the figure: 1. Hydrogen delivery pipe; 2. First sealing sleeve; 3. Second sealing sleeve; 4. Sealing ring; 5. Annular groove; 6. Sealing airbag; 7. Inflation pipe; 8. Sealing valve; 9. Gas collecting pipe; 10. Gas collecting tank; 11. Threaded sleeve; 12. Adjusting handle; 13. Telescopic sleeve; 14. Movable rod; 15. Sealing spring; 16. Sealing ball; 17. Gas collecting port. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0017] like Figures 1 to 4As shown, a sealing connection structure for a hydrogen delivery pipe includes two hydrogen delivery pipe sections 1, connected by a flange. A first sealing sleeve 2 and a second sealing sleeve 3 are slidably fitted onto each of the two hydrogen delivery pipe sections 1. Both the first sealing sleeve 2 and the second sealing sleeve 3 have through holes that mate with the hydrogen delivery pipe sections 1. Sealing retaining rings 4 that mate with the through holes are fixedly fitted onto the outer walls of both hydrogen delivery pipe sections 1. One end of the second sealing sleeve 3 has a sealing slot that mates with the first sealing sleeve 2. The first sealing sleeve 2 has an annular groove 5 at one end, and a sealing airbag 6 is inserted into the annular groove 5. An inflation tube 7 extending to one end of the first sealing sleeve 2 is fixedly connected to one side of the sealing airbag 6. A sealing valve 8 is fixedly connected to the end of the inflation tube 7. The two sections of the hydrogen delivery pipe body 1 are respectively provided with fixing mechanisms that cooperate with the first sealing sleeve 2 and the second sealing sleeve 3. The fixing mechanism includes a threaded sleeve 11 threadedly connected to the outer wall of the two sections of the hydrogen delivery pipe body 1. Adjusting handles 12 evenly arranged are fixedly connected to the outer wall of the threaded sleeve 11.

[0018] One end of the first sealing sleeve 2 is fixedly connected to an air collecting port 17. A U-shaped air collecting pipe 9 is fixedly connected to one side of the air collecting port 17. An air collecting tank 10 is fixedly connected to the other end of the U-shaped air collecting pipe 9. An air pressure sensor is provided inside the air collecting tank 10. A one-way valve mechanism is provided on the side of the U-shaped air collecting pipe 9 located at the air collecting port 17. The one-way valve mechanism includes a telescopic sleeve 13 fixedly connected inside the U-shaped air collecting pipe 9 located on the side of the air collecting port 17. A movable rod 14 is slidably inserted inside the telescopic sleeve 13. A sealing spring 15 that cooperates with the movable rod 14 is fixedly connected inside the telescopic sleeve 13. A sealing ball 16 that cooperates with the air collecting port 17 is fixedly connected to the end of the movable rod 14 away from the sealing spring 15.

[0019] In practical use, after connecting the two hydrogen delivery pipe sections 1 through flanges, the first sealing sleeve 2 and the second sealing sleeve 3 are respectively fitted onto the two pipe sections through the through holes, so that the first sealing sleeve 2 and the second sealing sleeve 3 on both sides abut against one side of the two sealing retaining rings 4, so that the sealing retaining rings 4 seal the through holes. At the same time, the first sealing sleeve 2 is inserted into the sealing slot at one end of the second sealing sleeve 3. The two threaded sleeves 11 are threadedly connected to the outer wall of the hydrogen delivery pipe section 1. By adjusting the handle 12, the threaded sleeves 11 on both sides are driven to move closer to and abut against the first sealing sleeve 2 and the second sealing sleeve 3, so that the first sealing sleeve 2 and the second sealing sleeve 3 on both sides form a sealing cover, covering the connection of the two pipe sections. The sealing airbag 6 is restarted through the inflation pipe 7, so that the sealing airbag 6 expands and seals the sealing slot, preventing gas from leaking from the sealing slot. After inflation is completed, the sealing valve 8 is tightened.

[0020] When hydrogen leaks at the pipe connection, the hydrogen first enters the sealing cover formed by the first sealing sleeve 2 and the second sealing sleeve 3. Under the action of air pressure, it pushes the sealing ball 16 away from the gas collecting port 17. The sealing ball 16 pushes the movable rod 14 to slide into the telescopic sleeve 13, compressing the sealing spring 15 and causing it to deform. This allows the hydrogen to enter the gas collecting tank 10 through the gas collecting pipe 9, thus collecting the hydrogen. The gas collecting tank 10 is equipped with a gas pressure sensor. When the gas pressure changes, it can be determined that a hydrogen leak has occurred, and maintenance measures can be taken immediately.

[0021] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0024] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A hydrogen delivery pipe sealing connection structure, comprising two hydrogen delivery pipe bodies (1) connected by flanges, characterized in that: first and second sealing sleeves (2) and (3) are respectively sleeved on the two hydrogen delivery pipe bodies (1), the first and second sealing sleeves (2) and (3) are respectively provided with through holes matched with the hydrogen delivery pipe bodies (1), the second sealing sleeve (3) is provided with a sealing slot matched with the first sealing sleeve (2) at one end, and the two hydrogen delivery pipe bodies (1) are respectively provided with fixing mechanisms matched with the first and second sealing sleeves (2) and (3); one end of the first sealing sleeve (2) is fixedly connected with a gas collecting port (17), one side of the gas collecting port (17) is fixedly connected with a U-shaped gas collecting pipe (9), the other end of the U-shaped gas collecting pipe (9) is fixedly connected with a gas collecting tank (10), and the U-shaped gas collecting pipe (9) is provided with a one-way valve mechanism on the side of the gas collecting port (17).

2. The seal connection structure of a hydrogen delivery pipe according to claim 1, wherein: one end of the first sealing sleeve (2) is provided with an annular groove (5), a sealing air bag (6) is inserted into the annular groove (5), one side of the sealing air bag (6) is fixedly connected with an inflation pipe (7) extending to one end of the first sealing sleeve (2), and the inflation pipe (7) is fixedly connected with a sealing valve (8) at the end.

3. The seal connection structure of a hydrogen delivery pipe according to claim 1, wherein: The fixing mechanism comprises a threaded sleeve (11) threadedly connected to the outer walls of the two hydrogen delivery pipe bodies (1), and the threaded sleeve (11) is fixedly connected with uniformly arranged adjusting handles (12) on the outer wall.

4. The seal connection structure of a hydrogen delivery pipe according to claim 3, wherein: The outer walls of the two hydrogen delivery pipe bodies (1) are fixedly sleeved with sealing retaining rings (4) matched with the through holes.

5. The seal connection structure of a hydrogen delivery pipe according to claim 1, wherein: The one-way valve mechanism comprises a telescopic sleeve (13) fixedly connected to the U-shaped gas collecting pipe (9) on the side of the gas collecting port (17), a movable rod (14) is slidably inserted into the telescopic sleeve (13), a sealing spring (15) is fixedly connected to the telescopic sleeve (13) and matched with the movable rod (14), and a sealing ball (16) is fixedly connected to the end of the movable rod (14) away from the sealing spring (15) and matched with the gas collecting port (17).

6. The seal connection structure of a hydrogen delivery pipe according to claim 1, wherein: The gas collecting tank (10) is provided with a gas pressure sensor.

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