Pressurizing pipeline for blasting hydrostatic test of hydrogen storage cylinder

Abstract

The utility model discloses a pressurizing pipeline for a blasting hydrostatic test of a hydrogen storage bottle, which comprises a pressurizing metal pipe, one end of the pressurizing metal pipe is connected with a metal joint used for being connected with a bottle opening of the hydrogen storage bottle, the pressurizing metal pipe is composed of a plurality of pipe sections, and the pipe sections are connected through pipeline connectors. And at least one pipe section of the pressurized metal pipe is continuously bent to form at least one n-shaped bent pipe section. The device has the advantages of being stable and reliable to use and convenient to maintain.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen storage cylinder explosion test technology, specifically to a pressurized pipeline for hydrogen storage cylinder explosion hydrostatic test. Background Technology

[0002] In traditional carbon fiber composite hydrogen storage cylinder pressurization technology, a single straight or Z-shaped pipe is typically used to connect the cylinder and the pressurization source. However, these pipe designs suffer from stability and durability issues under the burst pressure that would cause the carbon fiber composite hydrogen storage cylinder to rupture and fail. Traditional carbon fiber composite hydrogen storage cylinder pressurization pipes are easily damaged under burst forces, and once damaged, the entire pipe needs to be replaced, increasing maintenance costs and time. Furthermore, due to pipe length limitations, this technology cannot meet the needs of all application scenarios. Utility Model Content

[0003] The purpose of this invention is to provide a pressurized pipeline for hydrostatic testing of hydrogen storage cylinders that is stable, reliable, and easy to maintain.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a pressurized pipe for a hydrogen storage cylinder bursting hydrostatic test, comprising a pressurized metal pipe, one end of which is connected to a metal connector for connecting to the mouth of the hydrogen storage cylinder, the pressurized metal pipe being composed of multiple pipe segments, and the pipe segments being connected to each other through pipe connectors, at least one segment of the pressurized metal pipe being continuously bent to form at least one Π-shaped bend.

[0005] Furthermore, in the aforementioned pressurized pipeline for a hydrogen storage cylinder explosion hydrostatic test, the specific structure of the pipeline connector includes: a shell, a front connector, a rear connector, and a locking sleeve.

[0006] The housing has an axially penetrating through-hole, which changes diameter axially to form a large-diameter section and a small-diameter section. A stepped surface is formed at the diameter change of the through-hole. An internal thread is provided on the inner peripheral wall of the large-diameter section of the through-hole. The front connector has an axially penetrating front mounting hole that allows the insertion of a pressurized metal tube. A front shoulder is provided on the outer peripheral wall of the front connector. The rear connector has an axially penetrating rear mounting hole that allows the insertion of a pressurized metal tube. A rear shoulder is provided on the outer peripheral wall of the rear connector. An external thread that matches the internal thread of the through-hole in the housing is provided on the outer peripheral wall of the locking sleeve.

[0007] The front connector and the rear connector are inserted into the housing through hole sequentially from the large-diameter end of the through hole. The front shoulder of the front connector abuts against the stepped surface of the housing through hole. The front connector and the rear connector are connected to each other. The locking sleeve is movably sleeved on the outside of the rear connector and threadedly connected to the housing through hole. When the housing is rotated to move the locking sleeve along the housing through hole toward the rear connector, the locking sleeve can push the rear connector to move closer to the front connector through the rear shoulder until the rear connector and the front connector are pressed against the stepped surface of the housing through hole, so that the rear connector and the front connector are sealed and connected and locked in the housing.

[0008] Furthermore, in the aforementioned pressurized pipeline for a hydrogen storage cylinder burst hydrostatic test, a sealing gasket is provided between the front connector and the rear connector to seal the gap between their mating end faces.

[0009] Furthermore, in the aforementioned pressurized pipeline for a hydrogen storage cylinder burst hydrostatic test, an anti-collapse vent is provided on the outer wall of the pipeline connector housing, extending radially to a large-diameter section through hole.

[0010] Furthermore, in the aforementioned pressurized pipeline for a hydrogen storage cylinder explosion hydrostatic test, the second and fourth sections of the pressurized metal pipe each have a Π-shaped bend along the direction away from the metal joint.

[0011] Furthermore, in the aforementioned pressurized pipeline for a hydrogen storage cylinder explosion hydrostatic test, the pressurized metal pipe is welded to a metal joint, the front connector of the pipeline joint is sealed and fixed to the pressurized metal pipe section inserted into its front mounting hole by circumferential welding, and the rear connector of the pipeline joint is sealed and fixed to the pressurized metal pipe section inserted into its rear mounting hole by circumferential welding.

[0012] Through the implementation of the above technical solutions, the beneficial effects of this utility model are: (1) By designing the Π-shaped bending pipe section structure of the pressurized metal pipe, the flexibility and impact resistance of the pipe are greatly enhanced, so that the pressurized metal pipe can better withstand the impact when the carbon fiber composite hydrogen storage cylinder fails due to explosion, so that the pressurized metal pipe can be more stable under the explosion pressure, reducing the probability of damage to the pressurized metal pipe under the explosion pressure, and can be used stably and repeatedly under the explosion pressure; (2) The pressurized metal pipe adopts a multi-segment structure, and the segments are quickly connected by pipe connectors, which is convenient for disassembly and replacement. When a certain segment is damaged, only that segment needs to be replaced, without replacing the entire metal pressurized pipe, which greatly reduces maintenance costs and time, and solves the problem that the traditional gas cylinder pressurized pipe is easily damaged and inconvenient to maintain when the carbon fiber composite hydrogen storage cylinder explodes; (3) The structure is simple, easy to process, convenient to maintain, safe and reliable; (4) The length of the pressurized metal pipe can be adapted to the needs of different application scenarios by configuring different numbers of pipe segments, and the application range is wider. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the pressurized pipeline for a hydrogen storage cylinder explosion hydrostatic test according to the present invention.

[0014] Figure 2 This is a cross-sectional view of a pipe connector.

[0015] Figure 3 This is a 3D view of the front connector.

[0016] Figure 4 This is a 3D view of the rear connector.

[0017] Figure 5 This is a 3D view of the lock.

[0018] Figure 6 This is a cross-sectional view of the shell.

[0019] Figure 7 This is a three-dimensional view of the shell.

[0020] Figure 8 This is a 3D view of a pipe connector.

[0021] Figure 9 This utility model provides a schematic diagram of the structure of a pressurized pipeline connected to the mouth of a hydrogen storage cylinder for a hydrostatic test of a hydrogen storage cylinder explosion. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] like Figure 1 , Figure 9 As shown, a pressurized pipeline for a hydrogen storage cylinder burst hydrostatic test includes a pressurized metal pipe. One end of the pressurized metal pipe is connected to a metal connector 2 for connecting to the mouth of a hydrogen storage cylinder 1. The pressurized metal pipe is welded to the metal connector 2. The pressurized metal pipe is a rigid pipe with a multi-segment structure, that is, the pressurized metal pipe is composed of multiple pipe segments 3, and each pipe segment 3 is connected to the other through a pipe connector 4. At least one pipe segment 3 of the pressurized metal pipe is continuously bent to form at least one Π-shaped bend pipe segment 5. In practical applications, the number of pipe segments of the pressurized metal pipe can be arbitrarily configured according to the needs of the on-site working conditions. In this embodiment, the pressurized metal pipe is composed of 6 pipe segments. Along the direction away from the metal connector 2, the second and fourth pipe segments of the pressurized metal pipe each have one Π-shaped bend pipe segment 5.

[0024] In this embodiment, as Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the specific structure of the pipe connector 4 includes: a housing 41, a front connector 42, a rear connector 43, and a locking sleeve 44;

[0025] A through hole 411 is provided in the housing 41, axially penetrating the housing 41. The through hole 411 changes diameter axially to form a large-diameter section and a small-diameter section. A stepped surface 412 is formed at the diameter change of the through hole 411. An internal thread 413 is provided on the inner peripheral wall of the large-diameter section of the through hole 411. A front mounting hole 421 is provided in the front connector 42, axially penetrating the front connector 42 and allowing the insertion of a pressurized metal pipe. The front connector 42 of the pipe connector 4 and the pressurized metal pipe section 3 inserted into its front mounting hole 421 are sealed by circumferential welding. The front connector 42 has a front shoulder 422 on its outer peripheral wall, and the rear connector 43 has a rear mounting hole 431 that axially passes through the rear connector 43 and allows the insertion of a pressurized metal pipe. The rear connector 43 of the pipe connector 4 and the pressurized metal pipe section 3 inserted into its rear mounting hole 431 are sealed and fixed by circumferential welding. The rear connector 43 has a rear shoulder 432 on its outer peripheral wall. The locking sleeve 44 has an external thread 441 that matches the internal thread 413 of the housing through hole.

[0026] The front connector 42 and the rear connector 43 are sequentially inserted into the housing through hole 411 from the large-diameter end of the through hole. The front shoulder 422 of the front connector 42 abuts against the stepped surface 412 of the housing through hole 411. The front connector 42 and the rear connector 43 are aligned. After the front connector 42 and the rear connector 43 are inserted into the housing through hole 411, the housing 41 can still rotate freely relative to the front connector 42 and the rear connector 43. The locking sleeve 44 is movably sleeved on the outside of the rear connector 43 and threadedly connected to the housing through hole 411. The body 41 and the locking sleeve 4 are threaded together by the engagement of the internal thread 413 and the external thread 441; when the housing 41 is rotated forward so that the locking sleeve 44 moves along the housing through hole 411 toward the rear connector 43, the locking sleeve 44 can push the rear connector 43 toward the front connector 42 through the rear shoulder 432 until the rear connector 43 and the front connector 42 are pressed against the stepped surface 412 of the housing through hole 411, so that the rear connector 43 and the front connector 42 are sealed and connected and locked in the housing 41; in the front A sealing gasket 45 is provided between the connector 42 and the rear connector 43 to seal the gap between their mating end faces. The sealing gasket 45 better seals the gap between the mating end faces when the front connector 42 and the rear connector 43 are connected, improving the overall safety of the pressurized pipeline. In this embodiment, a puncture-proof vent 414 is provided on the outer wall of the housing 41 of the pipeline connector, which extends radially to the large-diameter section through hole. During the repeated use of the pressurized metal pipe, liquid hydrogen inevitably remains in the gap between the inner wall of the through hole of the pipeline connector 4 and the outer wall of the front connector 42, and between the inner wall of the through hole of the pipeline connector 4 and the outer wall of the rear connector 43. Liquid hydrogen is very easy to vaporize and expand. In order to avoid damage to the pipeline connector by the vaporization and expansion of liquid hydrogen, the puncture-proof vent 414 is designed. When the liquid hydrogen in the gap vaporizes and expands into hydrogen gas, it will be discharged from the puncture-proof vent 414 to the pipeline connector 4, thereby improving the stability and safety of the pipeline connector 4 and extending the service life of the pipeline connector.

[0027] Before conducting the hydrostatic test of the hydrogen storage cylinder burst, the number of pressurized metal pipe sections is configured according to the actual installation conditions. Then, the pipe sections 3 are connected to each other through pipe connectors 4. A metal joint 2 is welded to the end of the first section 3 of the pressurized metal pipe. The metal joint 2 is then sealed to the mouth of the hydrogen storage cylinder 1. Finally, the end of the last section 3 of the pressurized metal pipe is connected to a pressurizing source, thus completing the installation of the pressurized metal pipe before the hydrostatic test of the hydrogen storage cylinder burst.

[0028] During the hydrostatic test of hydrogen storage cylinder explosion, the pressurized metal pipe has a Π-shaped bend section. The Π-shaped structure design of the Π-shaped bend section greatly enhances the flexibility and impact resistance of the pipe, enabling the pressurized metal pipe to better withstand the impact when the carbon fiber composite hydrogen storage cylinder fails during explosion. This makes the pressurized metal pipe more stable under explosion pressure and reduces the probability of damage to the pressurized metal pipe under explosion pressure.

[0029] When a section of pipe is damaged, it can be quickly replaced using the quick-release pipe connector 4, eliminating the need to replace the entire pressurized metal pipe and significantly reducing maintenance costs and time. To replace a pipe section, simply reverse the housing 41 of the pipe connector 4 at both ends of the damaged section. During rotation, the housing 41 will disengage from the corresponding locking sleeve 41. Once the locking sleeve 41 disengages from the corresponding housing 41, the damaged pipe section can be removed. After removing the damaged pipe section, a front connector and housing will remain on the undamaged pipe section before the damaged section, and a rear connector will remain on the undamaged pipe section after the damaged section. Then, after installing the corresponding pipe connector components at both ends of the new pipe section, reassemble the pipe connector to complete the installation of the new pipe section. The process is very convenient.

[0030] The advantages of this utility model are: (1) By designing the Π-shaped bend pipe section structure of the pressurized metal pipe, the flexibility and impact resistance of the pipe are greatly enhanced, so that the pressurized metal pipe can better withstand the impact when the carbon fiber composite hydrogen storage cylinder fails due to explosion, so that the pressurized metal pipe can be more stable under the explosion pressure, reducing the probability of damage to the pressurized metal pipe under the explosion pressure, and can be used stably and repeatedly under the explosion pressure; (2) The pressurized metal pipe adopts a multi-segment structure, and the segments are quickly connected by pipe connectors, which is convenient for disassembly and replacement. When a certain segment is damaged, only that segment needs to be replaced, without replacing the entire metal pressurized pipe, which greatly reduces maintenance costs and time, and solves the problem that traditional gas cylinder pressurized pipes are easily damaged and inconvenient to maintain when carbon fiber composite hydrogen storage cylinders explode; (3) The structure is simple, easy to process, convenient to maintain, safe and reliable; (4) The length of the pressurized metal pipe can be adapted to the needs of different application scenarios by configuring different numbers of pipe segments, and the application range is wider.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any modifications or equivalent changes made based on the technical essence of the present utility model shall still fall within the scope of protection claimed by the present utility model.

Claims

1. A pressurized pipeline for a hydrogen storage cylinder burst hydrostatic test, characterized in that: It includes a pressurized metal pipe, one end of which is connected to a metal connector for connecting to the mouth of a hydrogen storage cylinder. The pressurized metal pipe is composed of multiple pipe segments, and the pipe segments are connected to each other by pipe connectors. At least one segment of the pressurized metal pipe is continuously bent to form at least one Π-shaped bend.

2. The pressurized pipeline for a hydrogen storage cylinder burst hydrostatic test according to claim 1, characterized in that: The specific structure of a pipe connector includes: a shell, a front connector, a rear connector, and a locking sleeve; The housing has an axially penetrating through-hole, which changes diameter axially to form a large-diameter section and a small-diameter section. A stepped surface is formed at the diameter change of the through-hole. An internal thread is provided on the inner peripheral wall of the large-diameter section of the through-hole. The front connector has an axially penetrating front mounting hole that allows the insertion of a pressurized metal tube. A front shoulder is provided on the outer peripheral wall of the front connector. The rear connector has an axially penetrating rear mounting hole that allows the insertion of a pressurized metal tube. A rear shoulder is provided on the outer peripheral wall of the rear connector. An external thread that matches the internal thread of the through-hole in the housing is provided on the outer peripheral wall of the locking sleeve. The front connector and the rear connector are inserted into the housing through hole sequentially from the large-diameter end of the through hole. The front shoulder of the front connector abuts against the stepped surface of the housing through hole. The front connector and the rear connector are connected to each other. The locking sleeve is movably sleeved on the outside of the rear connector and threadedly connected to the housing through hole. When the housing is rotated to move the locking sleeve along the housing through hole toward the rear connector, the locking sleeve can push the rear connector to move closer to the front connector through the rear shoulder until the rear connector and the front connector are pressed against the stepped surface of the housing through hole, so that the rear connector and the front connector are sealed and connected and locked in the housing.

3. The pressurized pipeline for a hydrogen storage cylinder burst hydrostatic test according to claim 2, characterized in that: A sealing gasket is provided between the front connector and the rear connector to seal the gap between their mating end faces.

4. The pressurized pipeline for a hydrogen storage cylinder burst hydrostatic test according to claim 2, characterized in that: The outer wall of the pipe connector housing is provided with anti-collapse air holes that extend radially to the large-diameter section through hole.

5. A pressurized pipeline for a hydrogen storage cylinder burst hydrostatic test according to any one of claims 1 to 4, characterized in that: Along the pressurized metal pipe away from the metal joint, the second and fourth sections of the pressurized metal pipe each have a Π-shaped bend.

6. The pressurized pipeline for a hydrogen storage cylinder burst hydrostatic test according to claim 2, characterized in that: The pressurized metal pipe is welded to the metal fitting. The front connector of the pipe fitting is sealed and fixed to the pressurized metal pipe section inserted into its front mounting hole by circumferential welding. The rear connector of the pipe fitting is sealed and fixed to the pressurized metal pipe section inserted into its rear mounting hole by circumferential welding.

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