Hydrogen delivery casing and method of installing a pipe fitting therefor

Abstract

The application provides a hydrogen conveying sleeve and a pipeline accessory installation method thereof. The hydrogen conveying sleeve comprises a first sleeve section, a second sleeve section and a pipeline accessory installation assembly. The first sleeve section comprises a first outer tube section and a first inner tube section, and forms a first annular gap for containing protective gas. The second sleeve section comprises a second outer tube section and a second inner tube section, and forms a second annular gap for containing protective gas. The first sleeve section and the second sleeve section are arranged at intervals. The pipeline accessory installation assembly is connected between the first sleeve section and the second sleeve section, and comprises a first pipeline accessory, a bypass pipe and a second pipeline accessory. The first pipeline accessory is located on a hydrogen conveying path. The bypass pipe is in communication with the first annular gap at a first end and in communication with the second annular gap at a second end. The bypass pipe and the first pipeline accessory are located on the outer circumferential sides of each other. The second pipeline accessory is arranged on the bypass pipe and located on a protective gas conveying path. According to the hydrogen conveying sleeve, the installation problem of pipeline accessories such as flow meters and valves in the hydrogen conveying sleeve system can be effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogen transmission pipeline, in particular to a hydrogen transmission casing pipe and a pipeline accessory installation method thereof. BACKGROUND

[0002] In view of the characteristics of energy distribution and demand in China, renewable energy such as wind, light and water is relatively abundant in the western region, and the demand for energy is relatively large in the eastern region. With the rapid development of hydrogen energy industry, there is a demand for large-scale low-cost transportation of hydrogen in the future. Using pipeline to transport hydrogen is an effective way to solve the problem of large-scale low-cost long-distance transportation of hydrogen.

[0003] In the related art, due to the high cost of building a dedicated hydrogen transmission pipeline, hydrogen is mainly transported by mixing in natural gas and transported by using a natural gas pipeline. However, the mixed transportation method has a series of problems, such as hydrogen damage to the natural gas steel pipeline, high mixing ratio limit, high hydrogen purification energy consumption, etc. When hydrogen-doped natural gas is directly used, there are problems such as reduced heat value and adaptability of terminal equipment to hydrogen-doped ratio.

[0004] Therefore, a casing pipe type hydrogen transmission pipeline system is proposed in the related art, which can avoid hydrogen damage to the pipeline and does not need to be purified, and has low cost. In the casing pipe type hydrogen transmission pipeline system, high-pressure hydrogen gas flows through the inner pipe, and the inner and outer pipes are filled with equal pressure protective gas to realize the decoupling of hydrogen and pressure bearing.

[0005] Since the hydrogen transmission casing pipe adopts a casing structure, the outer pipe is sleeved outside the inner pipe to completely wrap the inner pipe. Therefore, when the flow of pure hydrogen gas in the inner pipe and the protective gas in the outer pipe needs to be detected or a valve needs to be installed, the structural relationship between the outer pipe and the inner pipe will hinder the installation of the flow meter or the valve, resulting in difficulty in installing the flow meter and the valve on the outer pipe and the inner pipe of the hydrogen transmission casing pipe.

[0006] There is a lack of a technical solution in the current technology that can effectively solve the installation problem of the flow meter, valve and other pipeline accessories in the casing type hydrogen transmission pipeline system. SUMMARY

[0007] The main purpose of the present application is to provide a hydrogen transmission casing pipe and a pipeline accessory installation method thereof, which can effectively solve the installation problem of the flow meter, valve and other pipeline accessories in the hydrogen transmission casing pipe system.

[0008] In order to achieve the above purpose, according to one aspect of the present application, a hydrogen transmission casing pipe is provided, comprising:

[0009] The first casing pipe section comprises a first outer pipe section and a first inner pipe section, the first inner pipe section is sleeved in the first outer pipe section, and an annular gap for containing protective gas is formed between the first inner pipe section and the first outer pipe section;

[0010] The second sleeve section comprises a second outer tube section and a second inner tube section, the second inner tube section is sleeved in the second outer tube section, and an annular gap for containing the protective gas is formed between the second inner tube section and the second outer tube section, and the first sleeve section and the second sleeve section are arranged at intervals;

[0011] The pipeline accessory mounting assembly is connected between the first sleeve section and the second sleeve section, and comprises a first pipeline accessory, a bypass pipe and a second pipeline accessory, wherein,

[0012] The first pipeline accessory is arranged between the first inner tube section and the second inner tube section and is located on the hydrogen gas conveying path;

[0013] The first end of the bypass pipe is in communication with the first annular gap, and the second end is in communication with the second annular gap, the bypass pipe and the first pipeline accessory are located on the outer peripheral sides of each other, and the bypass pipe is offset from one side of the first outer tube section and the second outer tube section to a direction away from the first pipeline accessory to avoid the first pipeline accessory;

[0014] The second pipeline accessory is arranged on the bypass pipe and is located on the protective gas conveying path.

[0015] Further, the pipeline accessory mounting assembly further comprises sleeve adapters, both ends of the first pipeline accessory are respectively provided with the sleeve adapters, the first pipeline accessory is in communication with the first inner tube section and the second inner tube section through the sleeve adapters, and the bypass pipe is in communication with the first annular gap and the second annular gap through the sleeve adapters.

[0016] Further, the sleeve adapter comprises an inner connecting pipe and an outer connecting pipe, the outer connecting pipe is sleeved outside the inner connecting pipe and forms an adapter cavity with the inner connecting pipe, the adapter cavity has an open end at the first end and a closed end at the second end, the open end of the adapter cavity of one of the sleeve adapters is in butt joint with the annular gap of the first sleeve section, and the open end of the adapter cavity of the other sleeve adapter is in butt joint with the annular gap of the second sleeve section.

[0017] Further, a lateral interface is formed on the outer connecting pipe, the lateral interface is in communication with the adapter cavity, the first end of the bypass pipe is connected with the lateral interface of one of the sleeve adapters, and the second end of the bypass pipe is connected with the lateral interface of the other sleeve adapter.

[0018] Further, the outer connecting pipe and the inner connecting pipe are sleeves, the first end of the outer connecting pipe is arranged at intervals with the first end of the inner connecting pipe to form the open end of the adapter cavity, and the second end of the outer connecting pipe is sealingly connected to the inner connecting pipe through a sealing plate to form the closed end of the adapter cavity.

[0019] Further, the first inner pipe segment extends out of the first outer pipe segment, the end of the first outer pipe segment and the first inner pipe segment are sealed by a sealing plate, a lateral interface is formed on the first outer pipe segment, and the first end of the bypass pipe is connected to the lateral interface on the first outer pipe segment; and / or, the second inner pipe segment extends out of the second outer pipe segment, the end of the second outer pipe segment and the second inner pipe segment are sealed by a sealing plate, a lateral interface is formed on the second outer pipe segment, and the second end of the bypass pipe is connected to the lateral interface on the second outer pipe segment.

[0020] Further, the casing adapter is welded or threaded to the first casing segment and the second casing segment.

[0021] Further, the two ends of the first pipe accessory are respectively connected to the hydrogen delivery pipes, after the casing adapter is welded to the first casing segment and the second casing segment, the first pipe accessory is welded to the casing adapter through the hydrogen delivery pipes, and the second pipe accessory is welded to the casing adapter through the bypass pipe.

[0022] Further, the first casing accessory is a flow meter or a valve; and / or, the second casing accessory is a flow meter or a valve.

[0023] According to another aspect of the present application, a method for installing a pipe accessory of a hydrogen delivery casing is provided, comprising:

[0024] Preparation of the first casing segment;

[0025] Preparation of the second casing segment;

[0026] Connecting the pipe accessory installation assembly between the first casing segment and the second casing segment, so that the first pipe accessory is located on the hydrogen delivery path, the second pipe accessory is located on the protective gas delivery path of the bypass pipe, and the bypass pipe and the first pipe accessory are located on the outer circumferential sides of each other;

[0027] The bypass pipe is arranged to be offset from the side of the first outer pipe segment and the second outer pipe segment to the direction away from the first pipe accessory, so as to avoid the first pipe accessory.

[0028] Further, the step of connecting the pipe accessory installation assembly between the first casing segment and the second casing segment, so that the first pipe accessory is located on the hydrogen delivery path, the second pipe accessory is located on the protective gas delivery path of the bypass pipe, and the bypass pipe and the first pipe accessory are located on the outer circumferential sides of each other, comprises:

[0029] Reserving an installation position of the pipe accessory installation assembly between the first casing segment and the second casing segment;

[0030] Fixedly connecting the casing adapter to the first casing segment and the second casing segment;

[0031] Connecting the two hydrogen delivery pipes to the two casing adapters one by one, so that the hydrogen delivery pipes communicate with the first inner pipe segment and the second inner pipe segment;

[0032] The first pipe accessory is installed between the two hydrogen delivery pipes;

[0033] The bypass pipe is connected with the two sleeve adapters, so that the two ends of the bypass pipe respectively communicate with the adapter cavities of the two sleeve adapters;

[0034] The second pipe accessory is installed on the bypass pipe.

[0035] Further, the pipe accessory installation assembly is connected between the first sleeve segment and the second sleeve segment, so that the first pipe accessory is located on the hydrogen delivery path, the second pipe accessory is located on the protective gas delivery path of the bypass pipe, and the bypass pipe and the first pipe accessory are located on the outer circumferential sides of each other, and the step comprises:

[0036] Reserving an installation position of the pipe accessory installation assembly between the first sleeve segment and the second sleeve segment;

[0037] The sleeve adapter is fixedly connected on the first sleeve segment and the second sleeve segment;

[0038] The first pipe accessory is installed between the two hydrogen delivery pipes, so that the first pipe accessory and the two hydrogen delivery pipes are assembled;

[0039] The assembled hydrogen delivery pipe is connected with the two sleeve adapters, so that the hydrogen delivery pipe communicates with the first inner pipe segment and the second inner pipe segment;

[0040] The second pipe accessory is installed on the bypass pipe, so that the second pipe accessory and the bypass pipe are assembled;

[0041] The assembled bypass pipe is connected with the two sleeve adapters, so that the two ends of the bypass pipe respectively communicate with the adapter cavities of the two sleeve adapters.

[0042] Further, the pipe accessory installation method further comprises:

[0043] The first sleeve segment, the second sleeve segment and the pipe accessory installation assembly after installation are subjected to a sealing inspection.

[0044] The hydrogen delivery sleeve provided by the application comprises: a first sleeve section, which comprises a first outer tube section and a first inner tube section, the first inner tube section is sleeved in the first outer tube section, and an annular gap for containing protective gas is formed between the first inner tube section and the first outer tube section; a second sleeve section, which comprises a second outer tube section and a second inner tube section, the second inner tube section is sleeved in the second outer tube section, and an annular gap for containing protective gas is formed between the second inner tube section and the second outer tube section, the first sleeve section and the second sleeve section are arranged at intervals; a pipeline accessory mounting assembly is connected between the first sleeve section and the second sleeve section, and comprises a first pipeline accessory, a bypass pipe and a second pipeline accessory, wherein the first pipeline accessory is arranged between the first inner tube section and the second inner tube section and is located on the hydrogen delivery path; the first end of the bypass pipe is in communication with the first annular gap, and the second end is in communication with the second annular gap, the bypass pipe and the first pipeline accessory are located on the outer circumferential sides of each other, the bypass pipe is offset from one side of the first outer tube section and the second outer tube section to a direction away from the first pipeline accessory, so as to avoid the first pipeline accessory; the second pipeline accessory is arranged on the bypass pipe and is located on the protective gas delivery path. The hydrogen delivery sleeve is cut at the position where the pipeline accessory is required to be arranged, the mounting position of the pipeline accessory is left, then the bypass pipe is added to avoid the first pipeline accessory on the inner tube section, and since the bypass pipe is arranged between the cut first outer tube section and the second outer tube section, the interference problem caused by the sleeve joint of the outer tube section to the inner tube section at the mounting position of the first pipeline accessory can be avoided on the basis of ensuring the continuous delivery of the protective gas, the offset design of the bypass pipe makes the installation of the first pipeline accessory and the second pipeline accessory not interfere with each other, and sufficient space for mounting the first pipeline accessory and the second pipeline accessory is left, so that the installation and fixation of the pipeline accessories on the inner tube section and the outer tube section can be realized, the installation structure is simple, the installation method is flexible, the installation difficulty of the pipeline accessories is reduced, only part of the pipeline needs to be added in the whole process, the structure of the pipeline accessory does not need to be modified, the modification of the original structure is small, the modification cost is low, and the problem of installing the flow meter, the valve and other pipeline accessories in the hydrogen delivery sleeve system can be effectively solved, and large-scale, low-cost and long-distance delivery of hydrogen can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0045] The drawings constituting a part of the specification of the application are used to provide further understanding of the application, the illustrative embodiments of the application and the description thereof serve to explain the application, and do not constitute an improper limitation on the application. In the drawings:

[0046] Figure 1 The structure of the hydrogen delivery sleeve provided by the embodiment of the application is shown in the structural schematic view; and

[0047] Figure 2A flow chart of a method of installing a pipe fitting of a hydrogen delivery casing is shown.

[0048] Wherein, the above figures include the following reference signs:

[0049] 1, first outer pipe segment; 2, first inner pipe segment; 3, first annular gap; 4, second outer pipe segment; 5, second inner pipe segment; 6, second annular gap; 7, first pipe fitting; 8, bypass pipe; 9, second pipe fitting; 10, casing adapter; 11, inner connecting pipe; 12, outer connecting pipe; 13, adapter cavity; 14, lateral interface; 15, sealing plate; 16, hydrogen delivery pipe. DETAILED DESCRIPTION

[0050] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0051] For reference Figure 1 As shown, according to the embodiments of the present application, the hydrogen delivery casing includes a first casing segment, a second casing segment, and a pipe fitting installation assembly.

[0052] The first casing segment includes a first outer pipe segment 1 and a first inner pipe segment 2, the first inner pipe segment 2 is sleeved in the first outer pipe segment 1, and a first annular gap 3 for accommodating protective gas is formed between the first inner pipe segment 2 and the first outer pipe segment 1.

[0053] The second casing segment includes a second outer pipe segment 4 and a second inner pipe segment 5, the second inner pipe segment 5 is sleeved in the second outer pipe segment 4, and a second annular gap 6 for accommodating protective gas is formed between the second inner pipe segment 5 and the second outer pipe segment 4, and the first casing segment and the second casing segment are arranged at intervals.

[0054] The pipe fitting installation assembly is connected between the first casing segment and the second casing segment, and includes a first pipe fitting 7, a bypass pipe 8, and a second pipe fitting 9.

[0055] The first pipe fitting 7 is arranged between the first inner pipe segment 2 and the second inner pipe segment 5, and is located on the hydrogen delivery path.

[0056] The first end of the bypass pipe 8 is in communication with the first annular gap 3, and the second end is in communication with the second annular gap 6, the bypass pipe 8 and the first pipe fitting 7 are located on the outer circumferential sides of each other, and the bypass pipe 8 is offset from one side of the first outer pipe segment 1 and the second outer pipe segment 4 to a direction away from the first pipe fitting 7, so as to avoid the first pipe fitting 7.

[0057] The second pipe fitting 9 is arranged on the bypass pipe 8, and is located on the protective gas delivery path.

[0058] The hydrogen conveying jacket is modified at the position where the pipeline accessory is required to be arranged, the hydrogen conveying jacket is cut, and the installation position of the pipeline accessory is left, then the first pipeline accessory on the inner pipe section is avoided by increasing the bypass pipe 8, and since the bypass pipe 8 is arranged between the cut first outer pipe section 1 and the second outer pipe section 4, the interference problem caused by the sleeving of the outer pipe section on the inner pipe section at the installation position of the first pipeline accessory 7 can be avoided on the basis of ensuring the continuous conveying of the protective gas, the offset design of the bypass pipe 8 makes the installation of the first pipeline accessory 7 and the second pipeline accessory 9 not interfere with each other, and sufficient space for installing the first pipeline accessory 7 and the second pipeline accessory 9 is left, which facilitates the installation and fixation of the pipeline accessories on the inner pipe section and the outer pipe section, the installation structure is simple, the installation method is flexible, the installation difficulty of the pipeline accessories is reduced, only part of the pipeline needs to be increased in the whole process, the structure of the pipeline accessory does not need to be modified, the modification of the original structure is less, the existing pipeline accessory can be directly used for installation, the modification cost is low, and the problem of installing the flow meter, the valve and other pipeline accessories in the hydrogen conveying jacket system can be effectively solved, and large-scale, low-cost and long-distance hydrogen conveying can be facilitated.

[0059] The protective gas is, for example, an inert gas such as nitrogen or helium.

[0060] In the embodiment, the first pipeline accessory 7 and the second pipeline accessory 9 are exposed to the outside through the above structure, so that the first pipeline accessory 7 and the second pipeline accessory 9 can be maintained and replaced. Since the installation structures of the first pipeline accessory 7 and the second pipeline accessory 9 are independent of each other, the first pipeline accessory 7 and the second pipeline accessory 9 can be maintained and replaced separately, which is more convenient and has lower cost. In addition, since the first pipeline accessory 7 and the second pipeline accessory 9 belong to the pipeline accessory installation assembly, and the pipeline accessory installation assembly is arranged independently of the first jacket section and the second jacket section, the pipeline accessory installation assembly can be replaced and maintained as a whole when needed, without adjusting the first jacket section and the second jacket section, so that the maintenance and replacement difficulty of the pipeline accessory is reduced, and the replacement efficiency of the pipeline accessory is improved.

[0061] In one embodiment, the pipeline accessory installation assembly further comprises a jacket adapter 10, the two ends of the first pipeline accessory 7 are respectively provided with the jacket adapter 10, the first pipeline accessory 7 communicates with the first inner pipe section 2 and the second inner pipe section 5 through the jacket adapter 10, and the bypass pipe 8 communicates with the first annular gap 3 and the second annular gap 6 through the jacket adapter 10.

[0062] In the embodiment, based on the structure of the pipe fitting and the double-pipe feature of the hydrogen transmission sleeve, the pipe fitting is not suitable for being directly connected with the first sleeve segment and the second sleeve segment, and therefore the pipe fitting needs to be connected with the first sleeve segment and the second sleeve segment through the sleeve adapter 10. Since the sleeve adapter 10 can exist independently of the first sleeve segment, the second sleeve segment and the pipe fitting, the sleeve adapter 10 can be designed according to the connection feature of the sleeve segment and the pipe fitting, so that the sleeve adapter 10 can be used to realize the connection between the sleeve segment and the pipe fitting. In this way, the design difficulty of the connection structure between the sleeve segment and the pipe fitting can be reduced, and the design cost and the processing cost can be reduced, and the efficiency can be improved. Since the sleeve adapter 10 is specially set for the connection structure of the sleeve segment and the pipe fitting, the structural stability and the sealing performance of the sleeve segment and the pipe fitting after being connected can be more effectively ensured, so that the hydrogen transmission sleeve after being connected can have better connection performance.

[0063] In the embodiment, the sleeve adapter 10 can not only realize the connection between the first pipe fitting 7 and the first sleeve segment and the second sleeve segment, but also realize the communication between the bypass pipe 8 and the first annular gap 3 and the second annular gap 6, without causing structural damage to the first sleeve segment and the second sleeve segment, and with better replaceability.

[0064] In one embodiment, the sleeve adapter 10 includes an inner connecting pipe 11 and an outer connecting pipe 12, the outer connecting pipe 12 is sleeved outside the inner connecting pipe 11 and forms an adapter cavity 13 with the inner connecting pipe 11, the adapter cavity 13 has an open end at a first end and a closed end at a second end, the open end of the adapter cavity 13 of one sleeve adapter 10 is butted against the first annular gap 3 of the first sleeve segment, and the open end of the adapter cavity 13 of the other sleeve adapter 10 is butted against the second annular gap 6 of the second sleeve segment.

[0065] In the embodiment, by forming the adapter cavity 13 on the sleeve adapter 10, the end sealing of the annular gap can be conveniently realized, the flow path of the protective gas is forced to be transferred from the annular gap of the sleeve segment to the bypass pipe 8 through the adapter cavity 13, so that the gap between the two sleeve segments does not need to be filled, and the normal flow of the protective gas can still be ensured. Since the flow path of the protective gas is transferred, enough space can be left between the outer pipe segments of the two sleeve segments for installing the first pipe fitting 7, without affecting the normal function of the protective gas, so that the installation of the first pipe fitting 7 and the subsequent operation become simpler and easier to realize.

[0066] The adapter cavity 13 on the casing adapter 10 is specially designed, one end is open and the other end is closed, the open end is convenient for connecting with the annular gap to realize the transfer of protective gas, and the closed end is convenient for realizing the end closure of the outer pipe section of the casing section, so that the interval between the two outer pipe sections can be realized without modifying the outer pipe section.

[0067] In one embodiment, a lateral interface 14 is formed on the outer connecting pipe 12, the lateral interface 14 is in communication with the adapter cavity 13, the first end of the bypass pipe 8 is connected with the lateral interface 14 of one of the casing adapters 10, and the second end of the bypass pipe 8 is connected with the lateral interface 14 of the other casing adapter 10.

[0068] In this embodiment, by forming the lateral interface 14 on the outer connecting pipe 12 of the casing adapter 10, the connection between the casing adapter 10 and the bypass pipe 8 can be easily realized, so that the bypass pipe 8 can be easily connected with the adapter cavity 13. In order to further facilitate the connection between the outer connecting pipe 12 and the bypass pipe 8, a lateral joint can be provided on the side wall of the outer connecting pipe 12, and the lateral interface 14 is provided on the lateral joint. The lateral joint can be provided with a connecting thread to facilitate the threaded connection between the bypass pipe 8, or it can be provided as a protrusion on the side wall of the outer connecting pipe 12, so as to facilitate the welding between the bypass pipe 8. Since the lateral joint protrudes laterally from the outer connecting pipe 12, the welding between the lateral joint and the bypass pipe 8 can not only reduce the difficulty of welding, but also reduce the influence of welding temperature on the outer connecting pipe 12, thereby ensuring the structural strength of the outer connecting pipe 12.

[0069] In one embodiment, the outer connecting pipe 12 and the inner connecting pipe 11 are both sleeves, the first end of the outer connecting pipe 12 is spaced apart from the first end of the inner connecting pipe 11 to form the open end of the adapter cavity 13, and the second end of the outer connecting pipe 12 is sealingly connected to the inner connecting pipe 11 by a sealing plate 15 to form the closed end of the adapter cavity 13.

[0070] In this embodiment, the casing adapter 10 is formed by fixedly connecting two sleeves and a sealing plate 15, the two sleeves are coaxially arranged, and the adapter cavity 13 can be formed between the two sleeves. The sealing plate 15 is an annular plate structure, the outer periphery of the annular plate is welded and fixed to the outer sleeve, and the inner periphery of the annular plate is welded and fixed to the inner sleeve, thereby forming the adapter cavity 13 with one end open and the other end closed. The length of the outer sleeve is shorter than the length of the inner sleeve, so that part of the inner sleeve protrudes from the outer sleeve, thereby facilitating the connection and fixation between the inner sleeve and the first pipe accessory 7.

[0071] In some embodiments, the casing adapter 10 can also be directly stamped or cast.

[0072] In one embodiment, the first inner pipe section 2 extends out of the first outer pipe section 1, the end of the first outer pipe section 1 and the first inner pipe section 2 are sealed by a sealing plate 15, a lateral interface 14 is formed on the first outer pipe section 1, and the first end of the bypass pipe 8 is connected to the lateral interface 14 on the first outer pipe section 1; and / or, the second inner pipe section 5 extends out of the second outer pipe section 4, the end of the second outer pipe section 4 and the second inner pipe section 5 are sealed by a sealing plate 15, a lateral interface 14 is formed on the second outer pipe section 4, and the second end of the bypass pipe 8 is connected to the lateral interface 14 on the second outer pipe section 4.

[0073] In this embodiment, as an alternative embodiment, the casing adapter 10 can be omitted, and the structure for facilitating connection with the first pipe accessory 7 and the second pipe accessory 9 can be formed by designing the first casing section and the second casing section. In this embodiment, the lengths of the first inner pipe section 2 and the first outer pipe section 1 are designed differently, and the lengths of the second inner pipe section 5 and the second outer pipe section 4 are designed differently, so that the inner pipe section can protrude from the outer pipe section. It is convenient to seal the end of the outer pipe section by the sealing plate 15 to achieve the truncation of the outer pipe section, and it is also convenient to use the protruding inner pipe section to achieve the installation and fixation of the first pipe accessory 7. The structure of the above-mentioned differential design of the inner pipe section and the outer pipe section and the sealing of the annular gap by the sealing plate 15 can replace the function of the casing adapter 10, and at the same time, the lateral interface 14 provided on the outer pipe section also facilitates the setting of the bypass pipe 8, thereby facilitating the installation and fixation of the second pipe accessory 9.

[0074] In one embodiment, the casing adapter 10 is welded or threaded with the first casing section and the second casing section, which can be selected as needed.

[0075] In one embodiment, the first pipe accessory 7 is connected with the hydrogen conveying pipe 16 at both ends, and after the casing adapter 10 is welded with the first casing section and the second casing section, the first pipe accessory 7 is welded with the casing adapter 10 through the hydrogen conveying pipe 16, and the second pipe accessory 9 is welded with the casing adapter 10 through the bypass pipe 8.

[0076] In this embodiment, by providing the hydrogen conveying pipe 16 at both ends of the first pipe accessory 7, on the one hand, it is easy to achieve the connection and fixation between the inner connecting pipe of the casing adapter 10 and the first pipe accessory 7, and on the other hand, it is convenient to connect with the first pipe accessory 7, thereby achieving the installation and fixation of the first pipe accessory 7. Since the hydrogen conveying pipe 16 is separately provided, the required length can be cut according to the needs, so that the installation requirements of the first pipe accessory 7 can be more easily met.

[0077] By the above method, the pipe accessory installation assembly can be divided into multiple parts, and the installation steps can be selected according to the separation characteristics of the multiple parts to install the pipe accessory installation assembly, so that the first pipe accessory 7 and the second pipe accessory 9 can be installed and fixed, the installation difficulty is reduced, and the installation efficiency is improved.

[0078] In one embodiment, the wall thicknesses of the first outer pipe section 1, the second outer pipe section 4, and the outer connecting pipe 12 of the sleeve adapter 10 are the same, the wall thicknesses of the first inner pipe section 2, the second inner pipe section 5, and the hydrogen conveying pipe 16 are the same, and the wall thicknesses of the first outer pipe section 1 and the first inner pipe section 2 are different from the wall thicknesses of the second outer pipe section 4 and the second inner pipe section 5.

[0079] In one embodiment, the first pipe accessory 7 is a flow meter or a valve; and / or, the second pipe accessory 9 is a flow meter or a valve.

[0080] For better understanding, see Figure 2 As shown in the drawings, according to the embodiment of the present application, the pipe accessory installation method of the hydrogen conveying sleeve includes: preparing a first sleeve section; preparing a second sleeve section; connecting a pipe accessory installation assembly between the first sleeve section and the second sleeve section, so that the first pipe accessory 7 is located on the hydrogen conveying path, the second pipe accessory 9 is located on the protective gas conveying path of the bypass pipe 8, and the bypass pipe 8 and the first pipe accessory 7 are located on the outer circumferential sides of each other; and configuring the bypass pipe 8 to be offset from one side of the first outer pipe section 1 and the second outer pipe section 4 to a direction away from the first pipe accessory 7 to avoid the first pipe accessory 7.

[0081] By the above pipe accessory installation method, the first outer pipe section 1 and the second outer pipe section 4 are disconnected at the installation position of the first pipe accessory 7 to form an avoidance structure, so that the hydrogen conveying pipeline at the disconnected position of the first outer pipe section 1 and the second outer pipe section 4 can be exposed and not surrounded by the first outer pipe section 1 and the second outer pipe section 4, thereby leaving enough space for the installation of the first pipe accessory 7, avoiding the interference of the first outer pipe section 1 and the second outer pipe section 4 with the installation of the first pipe accessory 7, and allowing the first pipe accessory 7 to be conveniently installed on the hydrogen conveying pipeline to detect or control the hydrogen flowing through the hydrogen conveying pipeline.

[0082] Since the first outer pipe section 1 and the first inner pipe section 2 form the first annular gap 3 for containing protective gas, the second outer pipe section 4 and the second inner pipe section 5 form the second annular gap 6 for containing protective gas, and the first annular gap 3 and the second annular gap 6 are communicated through the bypass pipe 8, although the first outer pipe section 1 and the second outer pipe section 4 are disconnected, the protective gas can still be communicated through the bypass pipe 8, which does not affect the flow of the protective gas. The bypass pipe 8 is offset to the side away from the first pipe accessory 7 by a predetermined distance, so that the bypass pipe 8 and the first pipe accessory 7 can have enough spacing therebetween, thereby allowing the second pipe accessory 9 to be installed on the bypass pipe 8, so that the installation of the first pipe accessory 7 and the installation of the second pipe accessory 9 do not interfere with each other.

[0083] In one embodiment, the step of connecting the pipe accessory installation assembly between the first sleeve segment and the second sleeve segment, so that the first pipe accessory 7 is located on the hydrogen conveying path, the second pipe accessory 9 is located on the shielding gas conveying path of the bypass pipe 8, and the bypass pipe 8 and the first pipe accessory 7 are located on the peripheral side of each other, comprises: reserving an installation position of the pipe accessory installation assembly between the first sleeve segment and the second sleeve segment; fixedly connecting the sleeve adapter 10 on the first sleeve segment and the second sleeve segment; connecting the two hydrogen conveying pipes 16 with the two sleeve adapters 10 one by one, so that the hydrogen conveying pipes 16 communicate with the first inner pipe segment 2 and the second inner pipe segment 5; installing the first pipe accessory 7 between the two hydrogen conveying pipes 16; connecting the bypass pipe 8 with the two sleeve adapters 10, so that the two ends of the bypass pipe 8 respectively communicate with the adapter cavities 13 of the two sleeve adapters 10; and installing the second pipe accessory 9 on the bypass pipe 8.

[0084] In the present embodiment, when installing the pipe accessories, a sufficient installation interval, generally 1-2 m, is reserved in the hydrogen conveying sleeve at the position where the pipe accessories are to be installed, then the two sleeve adapters 10 are respectively welded with the first sleeve segment and the second sleeve segment, then the inner connecting pipes 11 of the sleeve adapters 10 are respectively welded with a hydrogen conveying pipe 16, the lateral interfaces 14 of the sleeve adapters 10 are respectively welded with a bypass pipe 8 with an elbow, the two hydrogen conveying pipes 16 are aligned in axis, and the installation space of the first pipe accessory 7 is reserved, the pipe segments of the two bypass pipes 8 for installing the second pipe accessory 9 are aligned in axis, and the installation space of the second pipe accessory 9 is reserved, and finally the first pipe accessory 7 and the second pipe accessory 9 are placed in the reserved installation positions, and the inlet and outlet joints are welded with the corresponding pipes. After the installation is completed, a sealing inspection is required, and for the welded structure, a radiographic inspection is also required for the weld position to ensure the reliability of the welded structure and avoid problems such as insecure welding.

[0085] In other embodiments, the two sleeve adapters 10 can be respectively threadedly connected with the first sleeve segment and the second sleeve segment, the hydrogen conveying pipes 16 and the inner connecting pipes 11 of the sleeve adapters 10 can be threadedly connected, and the bypass pipes 8 and the sleeve adapters can be threadedly connected.

[0086] In the present embodiment, since the sleeve adapter 10 is installed first during the installation process, the installation space left by the hydrogen delivery pipe 16 and the first pipe accessory 7 at this time can facilitate the welding of the first outer pipe section 1 and the second outer pipe section 4 with the outer connecting pipe 12 from the outside, and the welding of the first inner pipe section 2 and the second inner pipe section 5 with the inner connecting pipe 11 from the inner hole position of the inner connecting pipe 11, and can leave a welding path, after the welding at these positions is completed, the remaining welding work is all single pipe structure welding, not sleeve welding, so the entire welding process becomes simple to operate, and can be operated according to the conventional welding method.

[0087] In one embodiment, the step of connecting the pipe accessory installation assembly between the first sleeve section and the second sleeve section, so that the first pipe accessory 7 is located on the hydrogen delivery path, the second pipe accessory 9 is located on the protective gas delivery path of the bypass pipe 8, and the bypass pipe 8 and the first pipe accessory 7 are located on the peripheral side of each other, comprises: reserving an installation position for the pipe accessory installation assembly between the first sleeve section and the second sleeve section; fixedly connecting the sleeve adapter 10 to the first sleeve section and the second sleeve section; installing the first pipe accessory 7 between the two hydrogen delivery pipes 16, so that the first pipe accessory 7 and the two hydrogen delivery pipes 16 are assembled; connecting the assembled hydrogen delivery pipe 16 with the two sleeve adapters 10, so that the hydrogen delivery pipe 16 communicates with the first inner pipe section 2 and the second inner pipe section 5; installing the second pipe accessory 9 on the bypass pipe 8, so that the second pipe accessory 9 and the bypass pipe 8 are assembled; connecting the assembled bypass pipe 8 with the two sleeve adapters 10, so that the two ends of the bypass pipe 8 respectively communicate with the adapter cavities 13 of the two sleeve adapters 10.

[0088] In the present embodiment, it is basically the same as the previous embodiment, except that in the present embodiment, the hydrogen delivery pipe 16 and the first pipe accessory 7 are first assembled into a first installation assembly, and the bypass pipe 8 and the second pipe accessory 9 are assembled into a second installation assembly, and then the first installation assembly is integrally installed between the inner connecting pipes 11 of the two sleeve adapters 10 for welding, and the second installation assembly is installed at the lateral interfaces 14 of the two sleeve adapters 10 for welding, and finally the entire pipe accessory installation is completed.

[0089] In one embodiment, the pipe accessory installation method further comprises: performing a sealing inspection on the installed first sleeve section, second sleeve section and pipe accessory installation assembly. When welding is used during installation, radiographic inspection of the weld at the welded position is also required.

[0090] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting, as the scope of the exemplary embodiments of this application is limited only by the appended claims. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Also, unless otherwise indicated herein, the materials described herein can be used in a variety of applications.

[0091] It should be noted that the terms "first", "second", and the like, as used herein, are intended to modify any one of the identified objects, but do not imply a specific order or sequence, unless otherwise specifically indicated. It is to be understood that the use of the term "about" in describing the embodiments of this application is intended to convey that the description is an approximation, and that the embodiments of this application are not limited to the precise values, ranges, or parameters described, unless otherwise specifically indicated.

[0092] The preferred embodiments of the application are described herein with reference to the accompanying drawings, in which the same or similar elements in the drawings are referred to with the same reference numerals. The application is not limited to the preferred embodiments, but can be practiced with modification and alteration within the scope of the present application. Accordingly, the specification and drawings, including the embodiments, are illustrative in nature and not restrictive, as the scope of the application is defined by the appended claims.

Claims

1. A hydrogen transport sleeve, characterized in that, include: The first pipe section includes a first outer pipe section (1) and a first inner pipe section (2). The first inner pipe section (2) is fitted inside the first outer pipe section (1) and forms a first annular gap (3) between it and the first outer pipe section (1) to accommodate the protective gas. The second sleeve section includes a second outer sleeve section (4) and a second inner sleeve section (5). The second inner sleeve section (5) is sleeved inside the second outer sleeve section (4) and forms a second annular gap (6) between it and the second outer sleeve section (4) to accommodate protective gas. The first sleeve section and the second sleeve section are spaced apart. A pipe fitting installation assembly, connected between the first pipe section and the second pipe section, includes a first pipe fitting (7), a bypass pipe (8), and a second pipe fitting (9), wherein, The first pipeline fitting (7) is located between the first inner pipe section (2) and the second inner pipe section (5) and is located on the hydrogen transport path; The first end of the bypass pipe (8) is connected to the first annular gap (3), and the second end is connected to the second annular gap (6). The bypass pipe (8) and the first pipe fitting (7) are located on each other's outer periphery. The bypass pipe (8) is offset from one side of the first outer pipe section (1) and the second outer pipe section (4) away from the first pipe fitting (7) to avoid the first pipe fitting (7). The second pipeline accessory (9) is installed on the bypass pipe (8) and is located on the protective gas delivery path; The pipe fitting installation assembly also includes a sleeve adapter (10). The sleeve adapter (10) is provided at both ends of the first pipe fitting (7). The first pipe fitting (7) is connected to the first inner pipe section (2) and the second inner pipe section (5) through the sleeve adapter (10). The bypass pipe (8) is connected to the first annular gap (3) and the second annular gap (6) through the sleeve adapter (10).

2. The hydrogen transport sleeve according to claim 1, characterized in that, The sleeve adapter (10) includes an inner connecting pipe (11) and an outer connecting pipe (12). The outer connecting pipe (12) is sleeved outside the inner connecting pipe (11) and forms an adapter cavity (13) with the inner connecting pipe (11). The adapter cavity (13) has an open end at a first end and a closed end at a second end. The open end of the adapter cavity (13) of one of the sleeve adapters (10) is connected to the first annular gap (3) of the first sleeve segment, and the open end of the adapter cavity (13) of the other sleeve adapter (10) is connected to the second annular gap (6) of the second sleeve segment.

3. The hydrogen transport sleeve according to claim 2, characterized in that, The external connecting pipe (12) is provided with a side interface (14), which is connected to the adapter cavity (13). The first end of the bypass pipe (8) is connected to the side interface (14) of one of the sleeve adapters (10), and the second end of the bypass pipe (8) is connected to the side interface (14) of the other sleeve adapter (10).

4. The hydrogen transport sleeve according to claim 2, characterized in that, Both the outer connecting pipe (12) and the inner connecting pipe (11) are sleeves. The first end of the outer connecting pipe (12) and the first end of the inner connecting pipe (11) are spaced apart to form the open end of the transition cavity (13). The second end of the outer connecting pipe (12) is sealed to the inner connecting pipe (11) by a sealing plate (15) to form the closed end of the transition cavity (13).

5. The hydrogen transport sleeve according to claim 1, characterized in that, The first inner pipe section (2) extends out of the first outer pipe section (1), and the end of the first outer pipe section (1) is sealed to the first inner pipe section (2) by a sealing plate (15). A lateral interface (14) is provided on the first outer pipe section (1), and the first end of the bypass pipe (8) is connected to the lateral interface (14) on the first outer pipe section (1); and / or, the second inner pipe section (5) extends out of the second outer pipe section (4), and the end of the second outer pipe section (4) is sealed to the second inner pipe section (5) by a sealing plate (15). A lateral interface (14) is provided on the second outer pipe section (4), and the second end of the bypass pipe (8) is connected to the lateral interface (14) on the second outer pipe section (4).

6. The hydrogen transport casing according to any one of claims 1 to 4, characterized in that, The sleeve adapter (10) is welded or threaded to the first sleeve section and the second sleeve section.

7. The hydrogen transport casing according to any one of claims 1 to 4, characterized in that, The first pipeline accessory (7) is connected to hydrogen transmission pipelines (16) at both ends. After the casing adapter (10) is welded to the first casing section and the second casing section, the first pipeline accessory (7) is welded to the casing adapter (10) through the hydrogen transmission pipeline (16), and the second pipeline accessory (9) is welded to the casing adapter (10) through the bypass pipe (8).

8. The hydrogen transport casing according to any one of claims 1 to 5, characterized in that, The first pipe fitting (7) is a flow meter or a valve; and / or, the second pipe fitting (9) is a flow meter or a valve.

9. A method for installing pipeline accessories for a hydrogen transport casing as described in any one of claims 1 to 8, characterized in that, include: Prepare the first pipe section; Prepare the second casing section; Connect the pipe fitting installation assembly between the first pipe section and the second pipe section, such that the first pipe fitting (7) is located on the hydrogen delivery path, the second pipe fitting (9) is located on the protective gas delivery path of the bypass pipe (8), and the bypass pipe (8) and the first pipe fitting (7) are located on each other's outer periphery. The bypass pipe (8) is configured to be offset from one side of the first outer pipe section (1) and the second outer pipe section (4) away from the first pipe fitting (7) to avoid the first pipe fitting (7).

10. The pipe fitting installation method according to claim 9, characterized in that, The step of connecting the pipe fitting installation assembly between the first pipe section and the second pipe section, such that the first pipe fitting (7) is located on the hydrogen delivery path and the second pipe fitting (9) is located on the protective gas delivery path of the bypass pipe (8), and the bypass pipe (8) and the first pipe fitting (7) are located on each other's outer periphery, includes: An installation position for pipe fittings is reserved between the first and second pipe sections; The sleeve adapter (10) is fixedly connected to the first sleeve section and the second sleeve section; Connect the two hydrogen pipelines (16) to the two sleeve adapters (10) one by one, so that the hydrogen pipelines (16) are connected to the first inner pipe section (2) and the second inner pipe section (5); Install the first pipeline fitting (7) between the two hydrogen pipelines (16); Connect the bypass pipe (8) to the two sleeve adapters (10) so that both ends of the bypass pipe (8) are connected to the adapter cavities (13) of the two sleeve adapters (10); Install the second pipe fitting (9) onto the bypass pipe (8).

11. The pipe fitting installation method according to claim 9, characterized in that, The step of connecting the pipe fitting installation assembly between the first pipe section and the second pipe section, such that the first pipe fitting (7) is located on the hydrogen delivery path and the second pipe fitting (9) is located on the protective gas delivery path of the bypass pipe (8), and the bypass pipe (8) and the first pipe fitting (7) are located on each other's outer periphery, includes: An installation position for pipe fittings is reserved between the first and second pipe sections; The sleeve adapter (10) is fixedly connected to the first sleeve section and the second sleeve section; Install the first pipe fitting (7) between the two hydrogen transmission pipes (16) to complete the assembly between the first pipe fitting (7) and the two hydrogen transmission pipes (16); The assembled hydrogen pipeline (16) is connected to two sleeve adapters (10) so that the hydrogen pipeline (16) is connected to the first inner pipe section (2) and the second inner pipe section (5); Install the second pipe fitting (9) onto the bypass pipe (8) to complete the assembly of the second pipe fitting (9) and the bypass pipe (8); Connect the assembled bypass pipe (8) to the two sleeve adapters (10) so that both ends of the bypass pipe (8) are connected to the adapter cavities (13) of the two sleeve adapters (10).

12. The pipe fitting installation method according to claim 9, characterized in that, The method for installing pipe fittings also includes: Perform a sealing check on the first and second pipe sections and pipe fitting installation components after installation.

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