Cannula adapter and method of installing same, cannula connection structure

Abstract

The application provides a sleeve adapter, a mounting method thereof and a sleeve connection structure. The sleeve adapter comprises an inner adapter (1), an outer adapter (2) sleeved outside the inner adapter (1), a connecting section (3) and a sleeving section (4) fixedly connected, the sleeving section (4) can form an adapter cavity (5) with the inner adapter (1), and the sleeving section (4) has an adapter port (6) communicating with the adapter cavity (5); the inner adapter (1) and the outer adapter (2) are separately arranged before mounting and are sealingly connected between the connecting section (3) and the inner adapter (1) during mounting. According to the sleeve adapter, the connection between hydrogen conveying sleeves can be effectively solved, the inner pipe can be conveniently connected, and the continuity of the protective gas between the outer pipe and the inner pipe can be ensured.

Description

Technical Field

[0001] This invention relates to the field of hydrogen pipeline technology, and more specifically, to a sleeve adapter and its installation method, and a sleeve connection structure. Background Technology

[0002] Given the characteristics of my country's energy distribution and demand, the western region has relatively abundant renewable energy sources such as wind, solar, and hydropower, while the eastern region has a larger energy demand. With the rapid development of the hydrogen energy industry, there will be a need for large-scale, low-cost transportation of produced hydrogen in the future. Utilizing pipeline hydrogen transportation is an effective way to solve the problem of large-scale, low-cost, long-distance hydrogen transportation.

[0003] In related technologies, due to the high cost of constructing dedicated hydrogen pipelines, hydrogen is primarily transported by blending it with natural gas and then using natural gas pipelines. However, this blending method presents a series of problems, such as hydrogen damage to natural gas steel pipelines, high limitations on blending ratios, and high energy consumption for hydrogen purification. When hydrogen-blended natural gas is used directly, issues arise such as reduced calorific value and the adaptability of terminal equipment to the blending ratio.

[0004] To address this, a sheathed hydrogen pipeline system has been proposed in related technologies. This system avoids hydrogen damage to the pipeline caused by hydrogen gas, eliminates the need for purification, and is cost-effective. In this system, high-pressure hydrogen gas flows through the inner pipe, while an equal-pressure protective gas is used between the inner and outer pipes, thus decoupling the hydrogen-bearing and pressure-bearing environments.

[0005] Because the hydrogen transport sleeve adopts a sleeve structure, with the outer tube sleeved over the inner tube and completely enclosing it, the connection between the inner tubes is restricted by the obstruction of the outer tube structure when it is necessary to connect the two parts of the hydrogen transport sleeve, making the connection difficult. At the same time, the connection between the inner tubes needs to be continuous, and the connection of the protective gas between the outer and inner tubes also needs to be continuous, which further increases the difficulty of connecting the two sections of the hydrogen transport sleeve.

[0006] Currently, there is a lack of technical solutions that can effectively solve the connection problem between hydrogen transport sleeves. Summary of the Invention

[0007] The main objective of this invention is to provide a casing adapter and its installation method, as well as a casing connection structure, which can effectively solve the connection problem between hydrogen transport casings. It can facilitate the connection of the inner pipe and ensure the continuity of the protective gas between the outer pipe and the inner pipe.

[0008] To achieve the above objectives, according to one aspect of the present invention, a sleeve adapter is provided, comprising:

[0009] Internal adapter;

[0010] An external adapter, fitted outside an internal adapter, includes a fixedly connected connecting section and a sleeve section. The sleeve section can form an adapter cavity with the internal adapter, and the sleeve section has an adapter interface that communicates with the adapter cavity.

[0011] The inner and outer adapters are installed separately before installation, and a sealed connection is formed between the connecting section and the inner adapter during installation.

[0012] Furthermore, the axial length of the inner adapter is greater than that of the outer adapter. After the inner and outer adapters are installed, the first end of the inner adapter extends a predetermined distance from the outer adapter at the connection section, and the second end of the inner adapter is located inside the pipe opening of the sleeve section.

[0013] Furthermore, an adapter pipe is provided at the adapter interface. The adapter pipe is fixedly connected to the outside of the socket section and forms a sealed fit with the socket section.

[0014] Furthermore, the connecting section, socket section, and adapter pipe are formed as a single unit.

[0015] Furthermore, the inner adapter is fitted into the second end of the sleeve section, and the end is provided with a positioning step, which is configured to form a sleeve positioning with the pipe to be welded.

[0016] Furthermore, the second end of the inner adapter is provided with a guide surface on the pipe wall, which extends from the bottom of the positioning step to the inner wall surface.

[0017] Furthermore, the tangent direction of the guide surface at the connection position is consistent with the extension direction of the inner wall surface.

[0018] According to another aspect of the present invention, a method for installing the above-described bushing adapter is provided for connecting hydrogen transport bushings, the hydrogen transport bushings comprising an inner tube and an outer tube, the installation method comprising:

[0019] Connect the inner adapter to the inner tube to achieve a sealed connection between the inner adapter and the inner tube;

[0020] The outer adapter is fitted over the inner adapter, and the outer adapter and the outer pipe are connected to form a sealed connection.

[0021] Seal the connection between the external adapter and the internal adapter.

[0022] Furthermore, the steps of connecting the inner adapter to the inner tube to achieve a sealed connection between them include:

[0023] Fit the inner tube onto the positioning step of the inner adapter and push it to the stop position of the positioning step;

[0024] Weld and seal the connection between the inner tube and the inner adapter.

[0025] Furthermore, the steps of fitting the outer adapter over the inner adapter and connecting the outer adapter to the outer pipe to achieve a sealed connection between the outer adapter and the outer pipe include:

[0026] After the outer adapter is fitted over the inner adapter, rotate the outer adapter relative to the inner adapter so that the adapter on the outer adapter faces the preset position.

[0027] This ensures that the end face of the socket section of the external adapter is aligned with the end face of the external pipe connection.

[0028] Weld the external adapter to the external pipe at the docking point to seal and fix it.

[0029] Furthermore, the installation method also includes:

[0030] Align the pure hydrogen pipeline with the first end of the inner adapter, and weld and seal the pure hydrogen pipeline and the inner adapter.

[0031] After aligning the protective gas pipe with the adapter, weld and seal the protective gas pipe with the adapter.

[0032] According to another aspect of the present invention, a sleeve connection structure is provided for connecting two hydrogen delivery sleeves, including the aforementioned sleeve adapter, wherein each hydrogen delivery sleeve is provided with a sleeve adapter at its connection end, and the two sleeve adapters are connected to each other via a protective gas pipeline.

[0033] Furthermore, the casing connection structure also includes a pure hydrogen pipeline, which is located between the inner adapters of the two casing adapters and is sealed to the inner adapters.

[0034] According to the technical solution of this invention, the sleeve adapter includes: an inner adapter; and an outer adapter, sleeved outside the inner adapter, including a fixedly connected connecting section and a sleeved section. The sleeved section can form a transition cavity with the inner adapter, and has an interface communicating with the transition cavity. The inner and outer adapters are separately installed before installation, and a sealed connection is formed between the connecting section and the inner adapter during installation. The inner and outer adapters of this sleeve adapter are separately installed and only sealed during installation. Therefore, when connecting sleeves using this sleeve adapter, the connection between the inner adapter and the inner tube of the sleeve can be achieved first. Since the outer adapter is separate from the inner adapter at this time, the outer adapter will not obstruct the connection between the inner adapter and the inner tube, facilitating the connection between the inner adapter and the inner tube, ensuring connection quality, simplifying operation, and making it easier to implement. After completing the sealed connection between the inner adapter and the inner tube, the outer adapter can be sleeved outside the inner adapter, and... After the outer adapter and outer tube are connected and sealed, the outer adapter and inner adapter are then connected and sealed. This method allows the inner tube and outer tube to be connected separately, reducing the difficulty of the sleeve connection and improving the connection efficiency. At the same time, since the sleeve section has an interface that communicates with the adapter cavity, the annular cavity between the outer tube and the inner tube can be connected from the outside of the outer tube through the connection between the two interfaces. This enables the communication of the protective gas in the annular cavity, ensuring the continuity of hydrogen in the inner tube and the protective gas between the inner and outer tubes. Attached Figure Description

[0035] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0036] Figure 1 A schematic diagram of the sleeve adapter according to an embodiment of the present invention is shown;

[0037] Figure 2 A schematic diagram of the connection structure between the casing adapter and the hydrogen delivery casing according to an embodiment of the present invention is shown; and

[0038] Figure 3 A flowchart illustrating the installation method of the casing adapter and hydrogen delivery casing according to an embodiment of the present invention is shown.

[0039] The above figures include the following reference numerals:

[0040] 1. Internal adapter; 2. External adapter; 3. Connecting section; 4. Sleeve section; 5. Adapter cavity; 6. Adapter interface; 7. Adapter pipe; 8. Positioning step; 9. Guide surface; 10. Inner pipe; 11. Outer pipe; 12. Pure hydrogen pipeline; 13. Protective gas pipeline. Detailed Implementation

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] See also Figure 1 and 2 As shown, according to an embodiment of the present invention, the sleeve adapter includes: an inner adapter 1; and an outer adapter 2, sleeved outside the inner adapter 1, including a fixedly connected connecting section 3 and a sleeve section 4, the sleeve section 4 being able to form an adapter cavity 5 with the inner adapter 1, and the sleeve section 4 having an adapter interface 6 communicating with the adapter cavity 5; the inner adapter 1 and the outer adapter 2 are separately arranged before installation, and a sealed connection is formed between the connecting section 3 and the inner adapter 1 during installation.

[0043] The inner adapter 1 and outer adapter 2 of this sleeve adapter are set separately and are only sealed together during installation. Therefore, when connecting sleeves using this sleeve adapter, the inner adapter 1 can be connected to the inner tube 10 of the sleeve first. Since the outer adapter 2 is separate from the inner adapter 1 at this time, the outer adapter 2 will not obstruct the connection between the inner adapter 1 and the inner tube 10, making it easy to connect the inner adapter 1 and the inner tube 10, ensuring connection quality, and simplifying operation. After completing the sealed connection between the inner adapter 1 and the inner tube 10, the outer adapter 2 can be sleeved on the outside of the inner adapter 1, making... After the outer adapter 2 and the outer tube 11 are connected and sealed, the outer adapter 2 and the inner adapter 1 are then connected and sealed. In this way, the connection of the inner tube 10 and the connection of the outer tube 11 can be carried out separately, which reduces the difficulty of the sleeve connection and improves the connection efficiency. At the same time, since the sleeve section 4 has an interface that communicates with the adapter cavity 5, the connection between the two interfaces can be achieved from the outside of the outer tube 11 to the annular cavity between the outer tube 11 and the inner tube 10, thereby realizing the communication of the protective gas in the annular cavity and ensuring the continuity of the hydrogen in the inner tube 10 and the protective gas between the inner tube 10 and the outer tube 11.

[0044] In this embodiment, since the inner adapter 1 and the outer adapter 2 adopt a split structure, the inner adapter 1 can be installed first during installation, and then the installation position of the outer adapter 2 can be adjusted as needed. This can flexibly eliminate the distance error between the inner and outer pipes caused by laying hydrogen transport casing over long distances.

[0045] In one embodiment, the axial length of the inner adapter 1 is greater than the axial length of the outer adapter 2. After the inner adapter 1 and the outer adapter 2 are installed, the first end of the inner adapter 1 extends a predetermined distance from the outer adapter 2 from the connecting section 3, and the second end of the inner adapter 1 is located inside the pipe opening of the sleeve section 4.

[0046] In this embodiment, the inner adapter 1 is configured with an axial length greater than that of the outer adapter 2, and the first end of the inner adapter 1 extends beyond the outer adapter 2 from the connecting section 3. This allows the first end of the inner adapter 1 to be located axially outside the outer adapter 2. In other words, after the casing adapter is installed, the outer adapter 2 will not obstruct the first end of the inner adapter 1. Therefore, after the installation of the inner adapter 1 and the outer adapter 2 of the casing adapter is completed, operating space for the inner adapter 1 can be further reserved outside the outer adapter 2, enabling the connection between the pure hydrogen pipeline 12 and the inner adapter 1. Since the connection between the inner adapter 1 and the pure hydrogen pipeline 12 is performed outside the outer adapter 2, the operation is simple and convenient, avoiding interference caused by the outer adapter 2.

[0047] In one embodiment, an adapter pipe 7 is provided at the adapter 6. The adapter pipe 7 is fixedly connected to the outside of the socket section 4 and forms a sealed fit with the socket section 4.

[0048] In this embodiment, since the adapter 6 is directly formed on the socket section 4, it is inconvenient to align and position it when connecting it to the external protective gas pipeline 13, which increases the difficulty of operation. By adding an adapter pipe 7 at the adapter 6, the welding position of the protective gas pipeline 13 can be adjusted, reducing the difficulty of operation and improving the efficiency of operation. The adapter pipe 7 can be welded to the adapter 6, or it can be connected to the adapter 6 in other ways.

[0049] In one embodiment, the adapter pipe 7 can be provided with connecting threads to facilitate threaded connection with the protective gas pipeline 13, or it can be provided as a protruding post protruding from the side wall of the sleeve section 4 to facilitate welding with the protective gas pipeline 13. Since the adapter pipe 7 protrudes laterally from the sleeve section 4, the welding difficulty can be reduced when welding the adapter pipe 7 and the protective gas pipeline 13, and the influence of welding temperature on the sleeve section 4 can be reduced, thus ensuring the structural strength of the sleeve section 4.

[0050] In one embodiment, the connecting section 3, the socket section 4, and the adapter pipe 7 are integrally formed.

[0051] If a welding structure is used, welding the adapter pipe 7 directly onto the socket section 4 will affect the structural strength of the socket section 4 itself and have an adverse effect on the structure of the sleeve adapter. By setting the connecting section 3, the socket section 4 and the adapter pipe 7 as an integral molding structure, the connection strength of the overall structure of the external adapter 2 can be improved, the sealing performance can be guaranteed, and no additional connection operation is required. The external adapter 2 can be operated directly, which simplifies the installation steps and improves the installation efficiency.

[0052] In one embodiment, the inner adapter 1 is fitted inside the second end of the sleeve section 4, and a positioning step 8 is provided at the end. The positioning step 8 is configured to form a sleeve positioning with the pipe to be welded. The function of the positioning step 8 is twofold: firstly, it can position the inner pipe 10 for installation, facilitating quick docking; secondly, it can support the inner adapter 1, eliminating the hassle of hand welding and reducing labor; and thirdly, it can form a slope at the stop surface of the positioning step, which can cooperate with the welding end face of the inner pipe 10 to form a weld, thereby facilitating the filling of the weld with solder and further reducing the welding difficulty.

[0053] In one embodiment, the second end of the inner adapter 1 has a guide surface 9 on its pipe wall, which extends from the bottom of the positioning step 8 toward the inner wall surface. In this embodiment, since the bottom surface of the positioning step 8 is flush with the inner wall surface of the inner pipe 10, when the airflow reaches the position of the positioning step 8 through the inner pipe 10, it will flow along the guide surface 9 toward the inside of the inner adapter 1. Since the guide surface 9 extends from the bottom of the positioning step 8 toward the inner wall surface, it can form an inclined guide surface, reducing the flow resistance of the airflow from the inner pipe 10 to the inner adapter 1.

[0054] The guide surface 9 can be an inclined conical surface, and its generatrix can be a straight line. That is, within the cross section passing through the central axis of the inner adapter 1, the guide surface 9 presents a straight line. In other embodiments, the cross section of the guide surface 9 can also present an arc, or a combination of a straight line and an arc, or a combination of arcs.

[0055] In one embodiment, the tangent direction of the guide surface 9 at the connection position is consistent with the extension direction of the inner wall surface. In this embodiment, the guide surface 9 is a convex arc surface, preferably a 1 / 4 arc. Since the guide surface of the guide surface 9 is an arc surface and is tangent to the inner wall surface of the inner adapter 1 at the connection position, the airflow resistance can be reduced by gradually adjusting the guiding direction of the arc surface as the airflow passes through the guide surface 9. At the same time, the tangency between the guide surface 9 and the inner wall surface of the inner adapter 1 at the connection position makes the airflow at the connection position smoother, further reducing the airflow resistance and improving the airflow efficiency.

[0056] In one embodiment, the inner adapter 1 is a circular tube with an axial length of 200mm to 300mm. The outer diameter of the circular tube is equal to the outer diameter of the inner tube 10, and its thickness is equivalent to the wall thickness of the outer tube 11. The axial length of the positioning step 8 is, for example, 1 to 2mm.

[0057] The outer adapter 2 is a circular tube with a length of 100mm to 200mm, and its diameter and wall thickness are the same as those of the outer tube 11 of the hydrogen transport sleeve. A connecting pipe 7 is located on the outer side of the center of the tube wall, and the connecting pipe 7 has a through hole communicating with the adapter cavity 5. The connecting section 3 of the outer adapter 2 has a weld joint for the inner and outer adapters, and the inner diameter of the weld joint is approximately the same as the outer diameter of the inner adapter 1. Through this weld joint, the outer adapter 2 fits perfectly onto the inner adapter 1 and is welded and sealed. The adapter cavity 5 is an annular cavity and communicates with the connecting pipe 7. The thickness of the annular cavity is the same as the thickness of the annular cavity between the inner tube 10 and the outer tube 11 of the hydrogen transport sleeve.

[0058] In addition to welding, the inner adapter 1 of the casing adapter and the pure hydrogen pipeline 12, and the adapter pipe 7 of the casing adapter and the protective gas pipeline 13, can also be sealed by threaded joints or flange connections. After installation, an airtightness test should be performed.

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

[0060] See also Figure 1 and Figure 2 As shown, according to an embodiment of the present invention, the sleeve connection structure is used to connect two hydrogen delivery sleeves, including the aforementioned sleeve adapter. Each hydrogen delivery sleeve is provided with a sleeve adapter at its connection end, and the two sleeve adapters are connected to each other via a protective gas pipe 13. The protective gas pipe 13 is connected to the adapter pipe 7 and is sealed to the adapter pipe 7 at the connection position.

[0061] The casing connection structure also includes a pure hydrogen pipeline 12, which is positioned between the inner adapter 1 of the two casing adapters and is sealed to the inner adapter 1. The length of the pure hydrogen pipeline 12 can be cut as needed. In this way, when connecting different independent hydrogen delivery casings using the casing adapter, the spacing between the hydrogen delivery casings is not limited, making the use of the casing adapter more flexible and facilitating the connection between hydrogen delivery casings with different intervals, thus broadening its applicability.

[0062] See also Figure 3 As shown in the embodiment of the present invention, the above-described method for installing the casing adapter is used to connect hydrogen transport casings. The hydrogen transport casing includes an inner tube 10 and an outer tube 11. The installation method includes: connecting the inner adapter 1 to the inner tube 10 to achieve a sealed connection between the inner adapter 1 and the inner tube 10; fitting the outer adapter 2 over the inner adapter 1 and connecting the outer adapter 2 to the outer tube 11 to achieve a sealed connection between the outer adapter 2 and the outer tube 11; and sealing the connection between the connecting section 3 of the outer adapter 2 and the inner adapter 1.

[0063] In this embodiment, when installing the adapter on the hydrogen transport casing, the inner adapter 1 is first welded and sealed to the inner tube 10. Then, the outer adapter 2 is fitted over the inner adapter 1, and its position is adjusted to achieve a welded seal between the outer adapter 2 and the outer tube 11. Finally, the inner adapter 1 and the outer adapter 2 are welded and sealed to form a sealed adapter cavity 5. Since the relative position of the outer adapter 2 to the inner adapter 1 can be adjusted during installation, the distance error between the inner and outer tubes caused by the long-distance laying of the hydrogen transport casing can be eliminated.

[0064] In one embodiment, the step of connecting the inner adapter 1 and the inner tube 10 to achieve a sealed connection includes: fitting the inner tube 10 onto the positioning step 8 of the inner adapter 1 and pushing it to the stop position of the positioning step 8; and welding and sealing the connection between the inner tube 10 and the inner adapter 1. By setting the positioning step 8, it is easier to achieve alignment between the inner tube 10 and the inner adapter 1, ensuring their coaxiality and improving welding accuracy and quality.

[0065] In one embodiment, the step of fitting the outer adapter 2 over the inner adapter 1 and connecting the outer adapter 2 with the outer tube 11 to achieve a sealed connection between the outer adapter 2 and the outer tube 11 includes: after fitting the outer adapter 2 over the inner adapter 1, rotating the position of the outer adapter 2 relative to the inner adapter 1 so that the adapter interface 6 on the outer adapter 2 faces to a preset position; aligning the end face of the connecting end of the sleeve section 4 of the outer adapter 2 with the end face of the connecting end of the outer tube 11; and welding and sealing the outer adapter 2 and the outer tube 11 at the docking position.

[0066] In this embodiment, after the outer adapter 2 is fitted over the inner adapter 1, it is not directly welded to the outer pipe 11. Instead, the orientation of the interface 6 is adjusted as needed to ensure it meets the requirements before fixing the position of the outer adapter 2. Generally, the sleeve adapter is used to connect two hydrogen transport sleeves. Therefore, sleeve adapters are installed at the ends of both hydrogen transport sleeves. During installation, the interface 6 of one sleeve adapter can be rotated to a preset position, and then the outer adapter 2 can be directly welded to the outer pipe 11. Afterward, the orientation of the interface 6 on the outer adapter 2 can be used as a reference to adjust the orientation of the interface 6 on the other outer adapter 2 so that the orientations of the interface 6 on both outer adapters are consistent before welding the other outer adapter 2. This method ensures that the installation positions of the two sleeve adapters are well matched, facilitating the installation and fixing of the protective gas pipeline.

[0067] In one embodiment, the installation method further includes: aligning the pure hydrogen pipeline 12 with the first end of the inner adapter 1, and welding and sealing the pure hydrogen pipeline 12 and the inner adapter 1; aligning the protective gas pipeline 13 with the adapter 6, and welding and sealing the protective gas pipeline 13 with the adapter 6.

[0068] After the installation of the sleeve adapter is completed, a sealing check can be performed, and radiographic testing can be conducted on the weld seam to ensure sealing and welding quality.

[0069] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0070] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A sleeve adapter, characterized in that, include: Internal adapter (1); An external adapter (2) is fitted outside the internal adapter (1) and includes a fixedly connected connecting section (3) and a sleeve section (4). The sleeve section (4) can form an adapter cavity (5) with the internal adapter (1). The sleeve section (4) has an adapter interface (6) that communicates with the adapter cavity (5). The inner adapter (1) and the outer adapter (2) are set separately before installation. The outer adapter (2) is sleeved on the inner adapter (1) and can be axially displaced relative to the inner adapter (1). During installation, a sealed connection is formed between the connecting section (3) and the inner adapter (1). The axial length of the inner adapter (1) is greater than the axial length of the outer adapter (2). After the inner adapter (1) and the outer adapter (2) are installed, the first end of the inner adapter (1) extends from the connecting section (3) outside the outer adapter (2) by a predetermined distance, and the second end of the inner adapter (1) is located inside the pipe opening of the sleeve section (4). When the inner adapter (1) is sealed to the inner tube (10), the outer adapter (2) slides to the middle of the inner adapter (1), and the welding position of the inner adapter (1) and the inner tube (10) is located on the axial outside of the outer adapter (2); when the outer adapter (2) is sealed to the outer tube (11), the outer adapter (2) slides to the first end of the inner adapter (1), and the welding position of the first end of the inner adapter (1) and the inner tube (10) is located inside the outer adapter (2), and the outer adapter (2) is sealed to the outer tube (11) and the inner adapter (1) respectively.

2. The sleeve adapter according to claim 1, characterized in that, A connecting pipe (7) is provided at the adapter (6). The connecting pipe (7) is fixedly connected to the outside of the socket section (4) and forms a sealed fit with the socket section (4).

3. The sleeve adapter according to claim 2, characterized in that, The connecting section (3), the socket section (4), and the adapter pipe (7) are integrally formed.

4. The sleeve adapter according to any one of claims 1 to 3, characterized in that, The inner adapter (1) is fitted inside the second end of the sleeve section (4), and the end of the inner adapter (1) is provided with a positioning step (8), which is configured to form a sleeve positioning with the pipe to be welded.

5. The sleeve adapter according to claim 4, characterized in that, The second end of the inner adapter (1) is provided with a guide surface (9), which extends from the bottom of the positioning step (8) to the inner wall surface.

6. The sleeve adapter according to claim 5, characterized in that, The tangent direction of the guide surface (9) at the connection position is consistent with the extension direction of the inner wall surface.

7. A method for installing a casing adapter as described in any one of claims 1 to 6, used to connect hydrogen transport casings, the hydrogen transport casing comprising an inner tube (10) and an outer tube (11), characterized in that, The installation method includes: Connect the inner adapter (1) to the inner tube (10) to achieve a sealed connection between the inner adapter (1) and the inner tube (10); The outer adapter (2) is fitted over the inner adapter (1), and the outer adapter (2) and the outer tube (11) are connected to achieve a sealed connection between the outer adapter (2) and the outer tube (11). The connecting section (3) of the outer adapter (2) is sealed to the inner adapter (1).

8. The installation method according to claim 7, characterized in that, The step of connecting the inner adapter (1) to the inner tube (10) to achieve a sealed connection between the inner adapter (1) and the inner tube (10) includes: The inner tube (10) is fitted onto the positioning step (8) of the inner adapter (1) and pushed to the stop position of the positioning step (8); Weld and seal the inner tube (10) and the inner adapter (1) at the docking position.

9. The installation method according to claim 7, characterized in that, The steps of fitting the outer adapter (2) over the inner adapter (1) and connecting the outer adapter (2) with the outer tube (11) to achieve a sealed connection between the outer adapter (2) and the outer tube (11) include: After the outer adapter (2) is fitted over the inner adapter (1), rotate the position of the outer adapter (2) relative to the inner adapter (1) so that the adapter (6) on the outer adapter (2) faces the preset position; This aligns the end face of the connecting end of the socket section (4) of the external adapter (2) with the end face of the connecting end of the external tube (11); Weld and seal the external adapter (2) and the external tube (11) at the docking position.

10. The installation method according to claim 7, characterized in that, The installation method further includes: Align the pure hydrogen pipeline (12) with the first end of the inner adapter (1), and weld and seal the pure hydrogen pipeline (12) and the inner adapter (1) together. After aligning the protective gas pipe (13) with the adapter (6), weld and seal the protective gas pipe (13) with the adapter (6).

11. A sleeve connection structure for connecting two hydrogen transport sleeves, characterized in that, The casing adapter includes any one of claims 1 to 6, wherein each of the hydrogen transport casings is provided with a casing adapter at its connection end, and the two casing adapters are connected to each other via a protective gas pipeline (13).

12. The sleeve connection structure according to claim 11, characterized in that, The sleeve connection structure also includes a pure hydrogen pipeline (12), which is disposed between the inner adapters (1) of the two sleeve adapters and is sealed to the inner adapters (1).

Images