CN216350438U - Testing device for coiled pipe structure pipeline of ultralow-temperature liquid hydrogen storage pressure vessel - Google Patents
Testing device for coiled pipe structure pipeline of ultralow-temperature liquid hydrogen storage pressure vessel Download PDFInfo
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- CN216350438U CN216350438U CN202122259096.1U CN202122259096U CN216350438U CN 216350438 U CN216350438 U CN 216350438U CN 202122259096 U CN202122259096 U CN 202122259096U CN 216350438 U CN216350438 U CN 216350438U
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Abstract
The utility model relates to the technical field of cryogenic pressure vessel pipelines, in particular to a test device for a pipeline with an ultralow temperature liquid hydrogen storage pressure vessel coil structure, which comprises a pipeline chilling test device, the pipeline chilling test device comprises a rack, a rack platform, a liquid nitrogen tank, a first rigid rectangular frame and a second rigid rectangular frame which are arranged on the rack platform, a positioning support which is respectively arranged on the lower end faces of the inner parts of the first rigid rectangular frame and the second rigid rectangular frame and is used for positioning a pipeline of a coil pipe structure, and a hydraulic cylinder arranged at the upper part of the rigid rectangular frame, the front end of a piston rod of the hydraulic cylinder enters the rigid rectangular frame and points to the positioning support downwards, and the front end of a piston rod of the hydraulic cylinder is provided with a top pressure head for pressing the coil pipe structure pipeline on the positioning support, and a liquid nitrogen gas emptying pipe is also vertically arranged on the rack platform upwards. The utility model improves the reliability of the quality of the pipeline of the ultralow-temperature liquid hydrogen storage pressure vessel.
Description
Technical Field
The utility model relates to the technical field of cryogenic pressure vessel pipelines, in particular to a test device for a pipeline with an ultralow temperature liquid hydrogen storage pressure vessel coil structure.
Background
The ultra-low temperature liquid hydrogen storage pressure vessel is a cryogenic pressure vessel for storing low-temperature liquid gas, adopts a double-layer structure, and comprises an inner vessel and an outer vessel, wherein a vacuum interlayer space is formed between the inner vessel and the outer vessel to isolate the transfer of external heat so as to ensure the safety of the low-temperature liquefied gas in the inner vessel. In order to realize the input and output of the low-temperature liquid gas, a pipeline is usually connected to the ultralow-temperature liquid hydrogen storage pressure container.
Before the ultralow-temperature liquid hydrogen storage pressure container is used, the inner container needs to be filled with low-temperature liquid hydrogen, and when the low-temperature liquid hydrogen is filled, a pipeline on the ultralow-temperature liquid hydrogen storage pressure container is rapidly cooled, so that a chilling effect on the pipeline is formed. The pipeline under chilling is easy to crack due to the action of expansion with heat and contraction with cold.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a test device for a pipeline with an ultralow temperature liquid hydrogen storage pressure vessel coil structure, and aims to improve the reliability of the quality of the pipeline of the ultralow temperature liquid hydrogen storage pressure vessel. The specific technical scheme is as follows:
the utility model provides a test device of ultra-low temperature liquid hydrogen storage pressure vessel coil structure pipeline, the coil structure pipeline has the coil structure pipeline of a plurality of bendings for the middle of the pipeline, test device includes pipeline chilling test device, pipeline chilling test device includes the frame, sets up rack platform on frame upper portion, set up and be in other liquid nitrogen tank of rack platform, setting are in first rigidity rectangle frame and second rigidity rectangle frame on the rack platform, install respectively on the inside location support that is used for the location coil structure pipeline of terminal surface under first rigidity rectangle frame and the second rigidity rectangle frame, set up the pneumatic cylinder on rigidity rectangle frame upper portion, the piston rod front end of pneumatic cylinder gets into in the rigidity rectangle frame and point downwards the location support, the piston rod front end of pneumatic cylinder is provided with and is used for with the coil structure pipeline compresses tightly the top pressure head on the location support, and a liquid nitrogen gas emptying pipe is also vertically arranged on the rack platform upwards.
Preferably, the positioning support is provided with a semi-circular arc surface for supporting the excircle of the pipeline of the coil pipe structure; and the jacking head is provided with a semi-arc surface for pressing the excircle of the pipeline with the coil pipe structure.
During testing, the excircles at two ends of the pipeline of the ultralow-temperature liquid hydrogen storage pressure vessel coil pipe structure are respectively positioned on the positioning supports in the first rigid rectangular frame and the second rigid rectangular frame and are fixedly pressed by the top pressure head of the hydraulic cylinder; the liquid nitrogen storage device is characterized in that a liquid nitrogen output pipe is arranged on the liquid nitrogen tank, the liquid nitrogen output pipe is connected with one end of the ultralow-temperature liquid hydrogen storage pressure container coil structure pipeline, and the liquid nitrogen gas emptying pipe is connected with the other end of the ultralow-temperature liquid hydrogen storage pressure container coil structure pipeline.
As a further improvement of the utility model, the liquid nitrogen gas blow-down pipe is provided with a flow regulating valve for regulating the speed of liquid nitrogen gas blow-down.
In the utility model, the first rigid rectangular frame and the second rigid rectangular frame are respectively positioned on the rack platform through a key connection structure and are fixed through bolts.
In order to meet the requirements of the coil pipe structure tests with different specifications, more than three positioning grooves which are parallel and arranged at intervals are arranged on the rack platform, and the first rigid rectangular frame and the second rigid rectangular frame are positioned on the positioning grooves of the rack platform through key connection structures respectively; the first rigid rectangular frame and the second rigid rectangular frame are positioned by selecting different positioning grooves, so that the opening distance between the first rigid rectangular frame and the second rigid rectangular frame is adjusted.
The use method of the pipeline chilling test device comprises the following steps: the coil pipe structure pipeline is fixed in earlier installation, then is connected the both ends of coil pipe structure pipeline respectively with liquid nitrogen gas blow-down pipe, liquid nitrogen container, flow control valve to suitable safe aperture on the adjustment liquid nitrogen gas blow-down pipe opens the liquid nitrogen container, in the liquid nitrogen container got into coil pipe structure pipeline, the low temperature liquid nitrogen that enters into in the coil pipe structure pipeline played the chilling effect to coil pipe structure pipeline, low temperature liquid nitrogen becomes gaseous emission through liquid nitrogen gas blow-down pipe afterwards. And (4) detaching the pipeline with the coil pipe structure after the chilling test, and observing whether the pipeline with the coil pipe structure has the damage conditions such as cracking and the like caused by stress deformation.
The test device for the pipeline with the ultralow-temperature liquid hydrogen storage pressure vessel coil structure is also provided with a helium leakage test device in a matched manner, the helium leakage test device comprises a helium leakage detection sealing box, mounting holes are formed in two ends of the helium leakage detection sealing box respectively, a sealing cover plate is arranged on the mounting holes, a pipeline positioning hole is formed in the sealing cover plate, a sealing ring is arranged on the pipeline positioning hole, and a helium gas charging interface is further arranged on the helium leakage detection sealing box.
Preferably, a sealing gasket is arranged between the sealing cover plate and the end face of the pipeline positioning hole of the helium leak detection sealing box, and the sealing cover plate is fixed on the end face of the pipeline positioning hole through the sealing gasket and a bolt.
In the utility model, the helium leak detection test device is also provided with a helium leak detector in a matching way.
During helium leak hunting test, the both ends of ultra-low temperature liquid hydrogen storage pressure vessel coil structure pipeline are fixed a position respectively on the pipeline locating hole, the one end of ultra-low temperature liquid hydrogen storage pressure vessel coil structure pipeline is sealed with the end cap, helium leak hunting seal box is inside to be inflated into helium through the helium gas interface, other end inner bore department of ultra-low temperature liquid hydrogen storage pressure vessel coil structure pipeline sets up the helium probe and leaks out in order to detect whether have helium gas from the hole.
When the test device for the coil pipe structure pipeline of the ultralow-temperature liquid hydrogen storage pressure vessel is used, the coil pipe structure pipeline is firstly installed on a chilling test device to carry out chilling test, and then the coil pipe structure pipeline subjected to chilling test is installed on a helium leakage test device to carry out leakage detection.
The utility model has the beneficial effects that:
firstly, according to the test device for the ultralow-temperature liquid hydrogen storage pressure vessel pipe-line structure, the ultralow-temperature liquid hydrogen storage pressure vessel pipe-line adopts a pipe-line structure pipe-line with a plurality of bends in the middle, so that deformation caused by expansion with heat and contraction with cold under a working environment can be supplemented well, and the reliability of the ultralow-temperature liquid hydrogen storage pressure vessel quality is effectively improved.
Secondly, according to the test device for the coil structure pipeline of the ultralow-temperature liquid hydrogen storage pressure vessel, after the coil structure pipeline is manufactured, a chilling test device is used for carrying out chilling tests, the chilling test device can better simulate actual use working conditions, and the helium leak detection test device is beneficial to carrying out leak detection on the coil structure pipeline subjected to the chilling tests subsequently, so that the manufacturing quality of the coil structure pipeline is further ensured.
Thirdly, according to the test device for the coil pipe structure pipeline of the ultralow-temperature liquid hydrogen storage pressure vessel, more than three positioning grooves which are arranged in parallel and at intervals are arranged on a rack platform of the chilling test device, so that the positions of a first rigid rectangular frame and a second rigid rectangular frame on the chilling test device can be adjusted, and the universality of the chilling test device for different specifications of coil pipe structure pipelines is improved.
Fourthly, the test device for the coiled pipe structure pipeline of the ultralow-temperature liquid hydrogen storage pressure vessel is characterized in that the designed helium leak detection test device enables the helium leak detection probe to be free of moving detection, whether the coiled pipe structure pipeline has a leak defect after a chilling test can be comprehensively detected only by placing the helium leak detection probe in advance to an orifice at one end of the coiled pipe structure pipeline, the detection efficiency is high, and the defect that the conventional helium leak detection probe is easy to leak due to moving measurement on a pipe body is overcome.
Drawings
FIG. 1 is a schematic structural diagram of a pipeline chilling test device in a test device for a pipeline with an ultralow-temperature liquid hydrogen storage pressure vessel coil structure, disclosed by the utility model;
FIG. 2 is a schematic structural diagram of a helium leak detection test device in the test device for the pipeline with the coil structure of the ultralow-temperature liquid hydrogen storage pressure vessel.
In the figure: 1. the device comprises a rack, 2, a rack platform, 3, a liquid nitrogen tank, 4, a first rigid rectangular frame, 5, a second rigid rectangular frame, 6, a coil pipe structure pipeline, 7, a positioning support, 8, a hydraulic cylinder, 9, a piston rod, 10, a top pressure head, 11, a liquid nitrogen gas vent pipe, 12, a liquid nitrogen output pipe, 13, a flow regulating valve, 14, a key connection structure, 15, a bolt, 16, a positioning groove, 17, a helium leakage detection sealing box, 18, a sealing cover plate, 19, a sealing ring, 20, a helium gas charging interface, 21, a sealing gasket, 22, a helium leakage detector, 23, a plug seal, 24 and a helium leakage detection probe.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Referring to fig. 1 to 2, an embodiment of the testing apparatus for the coiled pipe structure pipeline of the ultralow temperature liquid hydrogen storage pressure vessel according to the present invention is shown, the coiled pipe structure pipeline 6 is a coiled pipe structure pipeline 6 with a plurality of bends in the middle of the pipeline, the testing apparatus includes a pipeline chilling test apparatus, the pipeline chilling test apparatus includes a frame 1, a frame platform 2 disposed at the upper portion of the frame 1, a liquid nitrogen tank 3 disposed beside the frame platform 2, a first rigid rectangular frame 4 and a second rigid rectangular frame 5 disposed on the frame platform 2, a positioning support 7 respectively mounted on the lower end surfaces of the insides of the first rigid rectangular frame 4 and the second rigid rectangular frame 5 for positioning the coiled pipe structure pipeline 6, a hydraulic cylinder 8 disposed at the upper portions of the rigid rectangular frames 4 and 5, and the front end of a piston rod 9 of the hydraulic cylinder 8 enters the rigid rectangular frame 4, 5, a positioning support 7 pointing downwards, a top pressure head 10 used for pressing the coil pipe structure pipeline 6 on the positioning support 7 is arranged at the front end of a piston rod 9 of the hydraulic cylinder 8, and a liquid nitrogen gas emptying pipe 11 is also vertically arranged on the rack platform 2 upwards.
Preferably, the positioning support 7 is provided with a semi-circular arc surface for supporting the excircle of the coil pipe structure pipeline 6; and a semi-circular arc surface for pressing the excircle of the pipe 6 with the coil pipe structure is arranged on the jacking head 10.
During testing, the excircles at two ends of the ultralow-temperature liquid hydrogen storage pressure vessel coil pipe structure pipeline 6 are respectively positioned on the positioning supports 7 in the first rigid rectangular frame 4 and the second rigid rectangular frame 5 and are compressed and fixed through the top pressure head 10 of the hydraulic cylinder 8; the liquid nitrogen storage device is characterized in that a liquid nitrogen output pipe 12 is arranged on the liquid nitrogen tank 3, the liquid nitrogen output pipe 12 is connected with one end of the ultralow-temperature liquid hydrogen storage pressure container coil structure pipeline 6, and the liquid nitrogen gas emptying pipe 11 is connected with the other end of the ultralow-temperature liquid hydrogen storage pressure container coil structure pipeline 6.
As a further improvement of the utility model, the liquid nitrogen gas blow-down pipe 11 is provided with a flow regulating valve 13 for regulating the speed of liquid nitrogen gas blow-down.
In the utility model, the first rigid rectangular frame 4 and the second rigid rectangular frame 5 are respectively positioned on the rack platform 2 through a key connection structure 14 and are fixed through bolts 15.
In order to meet the requirements of tests of coil pipe structures 6 with different specifications, more than three positioning grooves 16 which are arranged in parallel at intervals are arranged on the rack platform 2, and the first rigid rectangular frame 4 and the second rigid rectangular frame 5 are respectively positioned on the positioning grooves 16 of the rack platform 2 through key connection structures 14; the first rigid rectangular frame 4 and the second rigid rectangular frame 5 are positioned by selecting different positioning grooves 16, so that the opening distance between the first rigid rectangular frame 4 and the second rigid rectangular frame 5 can be adjusted.
The use method of the pipeline chilling test device comprises the following steps: coil pipe structure pipeline 6 is fixed in earlier installation, then with coil pipe structure pipeline 6's both ends respectively with liquid nitrogen gas blow-down pipe 11, liquid nitrogen container 3 is connected well, flow control valve 13 to suitable safe aperture on the adjustment liquid nitrogen gas blow-down pipe 11, open liquid nitrogen container 3, liquid nitrogen in the liquid nitrogen container 3 gets into in the coil pipe structure pipeline 6, the low temperature liquid nitrogen that enters into in the coil pipe structure pipeline 6 plays the chilling effect to coil pipe structure pipeline 6, low temperature liquid nitrogen becomes gaseous emission through liquid nitrogen gas blow-down pipe 11 afterwards. And (3) detaching the coil pipe structure pipeline 6 after the chilling test, and observing whether the coil pipe structure pipeline 6 has the damage conditions such as cracking and the like caused by stress deformation.
The test device for the pipeline with the ultralow temperature liquid hydrogen storage pressure vessel coil structure is also provided with a helium leakage test device in a matching manner, the helium leakage test device comprises a helium leakage detection sealing box 17, two ends of the helium leakage detection sealing box 17 are respectively provided with a mounting hole, a sealing cover plate 18 is arranged on the mounting hole, a pipeline positioning hole is formed in the sealing cover plate 18, a sealing ring 19 is arranged on the pipeline positioning hole, and a helium gas charging interface 20 is further arranged on the helium leakage detection sealing box 17.
Preferably, a sealing gasket 21 is arranged between the sealing cover plate 18 and the end face of the pipeline positioning hole of the helium leak detection sealing box 17, and the sealing cover plate 18 is fixed on the end face of the pipeline positioning hole through the sealing gasket 21 and a bolt 15.
In the utility model, the helium leak test device is also provided with a helium leak detector 22 in a matching way.
During helium leak detection test, the both ends of ultra-low temperature liquid hydrogen storage pressure vessel coil structure pipeline 6 are fixed a position respectively on the pipeline locating hole, end cap 23 seals is used to the one end of ultra-low temperature liquid hydrogen storage pressure vessel coil structure pipeline 6, helium is aerifyd the interface and is filled into helium through the helium to helium leak detection seal box 17 is inside, the other end inner bore department of ultra-low temperature liquid hydrogen storage pressure vessel coil structure pipeline 6 sets up helium leak detection probe 24 and leaks out in order to detect whether have helium to follow the hole.
When the test device for the coil structure pipeline of the ultralow-temperature liquid hydrogen storage pressure vessel is used, the coil structure pipeline 6 is firstly installed on a chilling test device to carry out chilling test, and then the coil structure pipeline 6 subjected to chilling test is installed on a helium leakage test device to carry out leakage detection.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a test device of ultra-low temperature liquid hydrogen storage pressure vessel coil structure pipeline, its characterized in that, coil structure pipeline has a plurality of crooked coil structure pipelines for the middle of the pipeline, test device includes pipeline chilling test device, pipeline chilling test device includes the frame, sets up rack platform on frame upper portion, setting are in other liquid nitrogen tank of rack platform, setting are in first rigidity rectangle frame and second rigidity rectangle frame on the rack platform, install respectively on the inside terminal surface down of first rigidity rectangle frame and second rigidity rectangle frame be used for the location coil structure pipeline location support, set up the pneumatic cylinder on rigidity rectangle frame upper portion, the piston rod front end of pneumatic cylinder gets into in the rigidity rectangle frame and point down the location support, the piston rod front end of pneumatic cylinder is provided with and is used for compressing tightly the coil structure pipeline top pressure head on the location support, and a liquid nitrogen gas emptying pipe is also vertically arranged on the rack platform upwards.
2. The test device for the ultra-low temperature liquid hydrogen storage pressure vessel coil pipe structure pipeline according to claim 1, characterized in that the positioning support is provided with a semi-circular arc surface for supporting the outer circle of the coil pipe structure pipeline; and the jacking head is provided with a semi-arc surface for pressing the excircle of the pipeline with the coil pipe structure.
3. The device for testing the coiled pipe structure of the ultralow-temperature liquid hydrogen storage pressure vessel as claimed in claim 1, wherein during testing, the excircles at two ends of the coiled pipe structure of the ultralow-temperature liquid hydrogen storage pressure vessel are respectively positioned on the positioning supports in the first rigid rectangular frame and the second rigid rectangular frame and are fixed by pressing and fastening through a pressing head of the hydraulic cylinder; the liquid nitrogen storage device is characterized in that a liquid nitrogen output pipe is arranged on the liquid nitrogen tank, the liquid nitrogen output pipe is connected with one end of the ultralow-temperature liquid hydrogen storage pressure container coil structure pipeline, and a liquid nitrogen gas emptying pipe is connected with the other end of the ultralow-temperature liquid hydrogen storage pressure container coil structure pipeline.
4. The test device for the ultra-low temperature liquid hydrogen storage pressure vessel coil structure pipeline according to claim 1, characterized in that a flow regulating valve for regulating the liquid nitrogen gas emptying speed is arranged on the liquid nitrogen gas emptying pipe.
5. The device for testing the pipelines in the coil structure of the ultra-low temperature liquid hydrogen storage pressure vessel as claimed in claim 1, wherein the first rigid rectangular frame and the second rigid rectangular frame are respectively positioned on the rack platform through a key connection structure and fixed through bolts.
6. The test device for the ultra-low temperature liquid hydrogen storage pressure vessel coil structure pipeline according to claim 5, characterized in that the rack platform is provided with more than three positioning grooves which are arranged in parallel and at intervals, and the first rigid rectangular frame and the second rigid rectangular frame are respectively positioned on the positioning grooves of the rack platform through a key connection structure; the first rigid rectangular frame and the second rigid rectangular frame are positioned by selecting different positioning grooves, so that the opening distance between the first rigid rectangular frame and the second rigid rectangular frame is adjusted.
7. The testing device for the ultra-low temperature liquid hydrogen storage pressure vessel coil structure pipeline according to claim 1, characterized in that a helium leak detection testing device is further arranged in a matched manner, the helium leak detection testing device comprises a helium leak detection sealing box, mounting holes are respectively formed in two ends of the helium leak detection sealing box, a sealing cover plate is arranged on each mounting hole, a pipeline positioning hole is formed in each sealing cover plate, a sealing ring is arranged on each pipeline positioning hole, and a helium gas inflation interface is further arranged on each leak detection sealing box.
8. The device for testing pipelines in a coil structure of an ultralow-temperature liquid hydrogen storage pressure vessel as claimed in claim 7, wherein a sealing gasket is arranged between the sealing cover plate and the end face of the pipeline positioning hole of the helium leak detection sealing box, and the sealing cover plate is fixed on the end face of the pipeline positioning hole through the sealing gasket and a bolt.
9. The device for testing the pipelines in the coil structure of the ultralow-temperature liquid hydrogen storage pressure vessel as claimed in claim 7, wherein the helium leak test device is further provided with a helium leak detector.
10. The testing device for the ultra-low temperature liquid hydrogen storage pressure vessel coil structure pipeline according to claim 8, characterized in that during helium leak detection test, two ends of the ultra-low temperature liquid hydrogen storage pressure vessel coil structure pipeline are respectively positioned on the pipeline positioning holes, one end of the ultra-low temperature liquid hydrogen storage pressure vessel coil structure pipeline is sealed by a plug, helium is filled in the helium leak detection sealing box through a helium gas inflation interface, and a helium leak detection probe is arranged at the inner hole at the other end of the ultra-low temperature liquid hydrogen storage pressure vessel coil structure pipeline to detect whether helium leaks out from the inner hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122259096.1U CN216350438U (en) | 2021-09-17 | 2021-09-17 | Testing device for coiled pipe structure pipeline of ultralow-temperature liquid hydrogen storage pressure vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122259096.1U CN216350438U (en) | 2021-09-17 | 2021-09-17 | Testing device for coiled pipe structure pipeline of ultralow-temperature liquid hydrogen storage pressure vessel |
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| Publication Number | Publication Date |
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| CN216350438U true CN216350438U (en) | 2022-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122259096.1U Active CN216350438U (en) | 2021-09-17 | 2021-09-17 | Testing device for coiled pipe structure pipeline of ultralow-temperature liquid hydrogen storage pressure vessel |
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| CN (1) | CN216350438U (en) |
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- 2021-09-17 CN CN202122259096.1U patent/CN216350438U/en active Active
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