A large-diameter pipe fitting for hydrogen transportation pipelines based on composite plates

Abstract

This utility model discloses a large-diameter pipe fitting for hydrogen transportation pipelines based on a composite plate, comprising: a tee structure, wherein the tee structure has an internal support structure in contact with each other; this utility model relates to the technical field of large-diameter pipe fittings. The tee structure and support structure are designed with an inner tube made of S31703 stainless steel and an outer tube made of Q345R alloy structural steel. The inner tube, with its high chromium, nickel, and molybdenum elements forming an anti-corrosion barrier, can directly contact the hydrogen medium. The outer tube, as a low-alloy high-strength steel, has both excellent plasticity and structural strength, which can meet the processing requirements of large-diameter pipe fittings such as rolling and stamping. Through the cooperation of the rotating shaft and the support rod, a cross structure is formed by rotating around it. The cooperation of the sliding groove, the sliding plate, and the support threaded rod, combined with the threaded transmission of the throttle handle, can precisely adjust the extension and retraction of the top block, so that it tightly presses against the inner wall of the inner tube, thus playing a supporting role.

Description

Technical Field

[0001] This utility model relates to the field of large-diameter pipe fittings technology, specifically a large-diameter pipe fitting for hydrogen transportation pipelines based on composite plates. Background Technology

[0002] With the rapid development of the hydrogen energy industry, the safe and efficient transportation of hydrogen has become a key link. The reliability of the hydrogen pipeline system directly affects the stable operation of the hydrogen energy industry chain. Large-diameter tee fittings, as important connecting components in hydrogen pipelines, are subjected to the impact and corrosion of high-pressure hydrogen medium for a long time, and their performance requirements are far higher than those of ordinary pipelines.

[0003] Traditional hydrogen transport tee pipe fittings for large diameter pipelines have some shortcomings in practical applications. Fittings made of a single material cannot simultaneously ensure corrosion resistance and structural strength. If pure stainless steel is used, although it can resist hydrogen corrosion to a certain extent, it is expensive and has poor plasticity, making it difficult to meet the complex processing requirements of large diameter fittings. If ordinary alloy structural steel is used, although it has high strength and is easy to process, its resistance to hydrogen corrosion is insufficient. Long-term use can easily lead to leakage risks due to material deterioration, seriously threatening the safety of hydrogen transport. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a large-diameter pipe fitting for hydrogen transportation pipelines based on composite plates, which solves the problem that traditional hydrogen transportation tees and single-material fittings cannot simultaneously achieve both corrosion resistance and structural strength.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A large-diameter pipe fitting for hydrogen transportation pipelines based on composite plates includes: a tee structure, wherein a support structure is in contact with the interior of the tee structure; the support structure includes a rotating shaft, a support rod symmetrically rotatably connected to the outer wall of the rotating shaft, a sliding groove symmetrically formed on the inner wall of the support rod, a sliding plate slidably connected to the inner wall of the sliding groove, a support threaded rod fixedly connected to the outer wall of the sliding plate, a top block fixedly connected to the outer wall of the support threaded rod, a slip ring symmetrically rotatably connected to the outer wall of the support rod, and a handle fixedly connected to the outer wall of the slip ring.

[0007] Preferably, the slip rings are arranged on both sides of the support rod, the support threaded rods are symmetrically arranged on both sides of the support rod, and the rotating shaft serves as the core connecting component, allowing the support rods on both sides to rotate around it, forming a cross structure, which facilitates the adjustment of the support position according to the spatial angle of the three-way opening.

[0008] Preferably, the outer wall of the supporting threaded rod is threadedly connected to the inner wall of the throttle, and the top block is located on the side away from the slide plate. When the throttle is rotated, since the supporting threaded rod is threadedly connected to the inner wall of the throttle, the rotational motion of the throttle is converted into the linear movement of the supporting threaded rod, which in turn drives the top block to move.

[0009] Preferably, the tee structure includes an inner tube, and an outer tube is fixedly connected to the outer wall of the inner tube. The inner tube is made of S31703 stainless steel, which is a high-alloy austenitic stainless steel. Due to its high content of chromium, nickel and molybdenum, it exhibits excellent performance in terms of corrosion resistance and mechanical properties. The outer tube is made of Q345R alloy structural steel, which is a low-alloy high-strength structural steel with good plasticity. It can be cold-worked or hot-worked by rolling, stamping, bending and other processes.

[0010] Preferably, the outer wall of the top block is in contact with the inner wall of the inner tube, and the support structure is set at the tee opening of the tee structure. By adjusting the extension and retraction of the support threaded rod, the top block can be tightly pressed against the inner wall of the inner tube. Using symmetrically arranged slip rings and support threaded rods, a uniform support force is formed on the inner wall of the tee opening from both sides.

[0011] This utility model provides a large-diameter pipe fitting for hydrogen transportation pipelines based on a composite plate. It has the following beneficial effects:

[0012] (I) This tee structure, through the composite design of the inner tube made of S31703 stainless steel and the outer tube made of Q345R alloy structural steel, achieves the dual advantages of "corrosion resistance + strong support". The inner tube, with its anti-corrosion barrier composed of high chromium, nickel and molybdenum elements, can directly contact the hydrogen medium and effectively resist hydrogen corrosion, avoiding the risk of leakage due to material deterioration from the source. The outer tube, as a low alloy high strength steel, has both excellent plasticity and structural strength. It can not only meet the processing requirements of large-diameter pipe fittings such as rolling and stamping, but also provide stable mechanical support for the overall structure, ensuring that the pipe fittings are not easily deformed in the high-pressure hydrogen transportation environment, and greatly improving the safety of long-term use.

[0013] (ii) The support structure, through the cooperation of the rotating shaft and the support rod, forms a cross structure by rotating around it. The cooperation of the sliding groove, the sliding plate and the support threaded rod, combined with the threaded transmission of the throttle, can accurately adjust the extension and retraction of the top block, so that it tightly presses against the inner wall of the inner tube. This design, through the symmetrically distributed slip rings and support threaded rods, forms a uniform and adjustable support force from both sides, effectively offsetting the impact and deformation force of the internal pressure on the tee during installation, avoiding cracking or leakage caused by uneven force, and significantly extending the service life of the pipe fitting. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the supporting structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the support rod of this utility model;

[0017] Figure 4 This is a schematic diagram of the three-way structure of this utility model.

[0018] In the diagram: 1. T-junction structure; 11. Inner tube; 12. Outer tube; 2. Support structure; 21. Shaft; 22. Support rod; 23. Slide groove; 24. Slide plate; 25. Support threaded rod; 26. Top block; 27. Slip ring; 28. Thruster. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4 This utility model provides a technical solution: a large-diameter pipe fitting for hydrogen transportation pipelines based on composite plates, comprising: a tee structure 1, with a support structure 2 in contact with the interior of the tee structure 1; the support structure 2 includes a rotating shaft 21, with a support rod 22 symmetrically rotatably connected to the outer wall of the rotating shaft 21, and symmetrically provided grooves 23 on the inner wall of the support rod 22, with a sliding plate 24 slidably connected to the inner wall of the groove 23, a support threaded rod 25 fixedly connected to the outer wall of the sliding plate 24, a top block 26 fixedly connected to the outer wall of the support threaded rod 25, a slip ring 27 symmetrically rotatably connected to the outer wall of the support rod 22, and a handle 28 fixedly connected to the outer wall of the slip ring 27.

[0021] Slip rings 27 are arranged on both sides of support rod 22, and support threaded rods 25 are symmetrically arranged on both sides of support rod 22. Rotating shaft 21 serves as the core connecting component, allowing the support rods 22 on both sides to rotate around it, forming a cross structure, which facilitates the adjustment of the support position according to the spatial angle of the three-way port.

[0022] The outer wall of the support threaded rod 25 is threadedly connected to the inner wall of the throttle 28. The top block 26 is located on the side away from the slide plate 24. When the throttle 28 is rotated, the rotational motion of the throttle 28 is converted into the linear movement of the support threaded rod 25 due to the threaded connection between the support threaded rod 25 and the inner wall of the throttle 28, which in turn drives the top block 26 to move.

[0023] The tee structure 1 includes an inner tube 11, and an outer tube 12 is fixedly connected to the outer wall of the inner tube 11. The inner tube 11 is made of S31703 stainless steel, which is a high-alloy austenitic stainless steel. Due to its high content of chromium, nickel and molybdenum, it exhibits excellent performance in terms of corrosion resistance and mechanical properties. The outer tube 12 is made of Q345R alloy structural steel, which is a low-alloy high-strength structural steel with good plasticity. It can be cold-worked or hot-worked by rolling, stamping, bending and other processes.

[0024] The outer wall of the top block 26 is in contact with the inner wall of the inner tube 11. The support structure 2 is set at the tee opening of the tee structure 1. By adjusting the extension and retraction of the support threaded rod 25, the top block 26 can be tightly pressed against the inner wall of the inner tube 11. The symmetrically arranged slip rings 27 and support threaded rods 25 form a uniform support force on the inner wall of the tee opening from both sides.

[0025] When in use, the tee structure 1 is the main structure of the pipe fitting, and the support structure 2 plays a role in supporting and stabilizing the tee structure 1, which facilitates the connection and installation with external pipes.

[0026] The inner tube 11 of the tee structure 1 is made of S31703 stainless steel and the outer tube 12 is made of Q345R alloy structural steel. The inner tube 11, with its high chromium, nickel and molybdenum content, has excellent corrosion resistance and can directly contact the hydrogen medium to prevent pipeline damage caused by hydrogen corrosion. The outer tube 12, as a low alloy high strength steel, has good plasticity and high structural strength, providing overall structural support for the entire pipe fitting and ensuring the structural stability of the pipe fitting under hydrogen transportation pressure. At the same time, it can adapt to the processing requirements of rolling, stamping and other processes, and meet the forming requirements of large-diameter pipe fittings.

[0027] The support structure 2 is set at the tee opening of the tee structure 1. It achieves stable support for the tee opening through the cooperation of multiple components. Specifically, the rotating shaft 21 serves as the core connector, allowing the support rods 22 on both sides to rotate around it, forming a cross structure, which facilitates the adjustment of the support position according to the spatial angle of the tee opening.

[0028] The groove 23 on the inner wall of the support rod 22 provides a sliding track for the slide plate 24. The slide plate 24 is fixedly connected to the support threaded rod 25. When the handle 28 is turned, the rotational motion of the handle 28 is converted into the linear movement of the support threaded rod 25 due to the threaded connection between the support threaded rod 25 and the inner wall of the handle 28, thereby driving the top block 26 to move. The top block 26 contacts the inner wall of the inner tube 11. By adjusting the extension and retraction of the support threaded rod 25, the top block 26 can be tightly pressed against the inner wall of the inner tube 11. The symmetrically arranged slip rings 27 and support threaded rods 25 form a uniform support force on the inner wall of the tee from both sides, offsetting the impact and deformation force generated by the internal pressure of the pipeline on the tee during installation, and preventing the tee from cracking or leaking due to uneven force.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large-diameter pipe fitting for a hydrogen transport pipeline based on a clad plate, characterized by include: A three-way structure (1) has a supporting structure (2) in contact with its interior. The support structure (2) includes a rotating shaft (21), a support rod (22) is symmetrically rotatably connected to the outer wall of the rotating shaft (21), a sliding groove (23) is symmetrically opened on the inner wall of the support rod (22), a sliding plate (24) is slidably connected to the inner wall of the sliding groove (23), a support threaded rod (25) is fixedly connected to the outer wall of the sliding plate (24), a top block (26) is fixedly connected to the outer wall of the support threaded rod (25), a slip ring (27) is symmetrically rotatably connected to the outer wall of the support rod (22), and a throttle (28) is fixedly connected to the outer wall of the slip ring (27).

2. The large-diameter pipe fitting for hydrogen pipeline based on composite plate according to claim 1, characterized in that: The slip ring (27) is arranged on both sides of the support rod (22), and the support threaded rod (25) is symmetrically arranged on both sides of the support rod (22).

3. The large-diameter pipe fitting for hydrogen pipeline based on composite plate according to claim 1, characterized in that: The outer wall of the support threaded rod (25) is threaded to the inner wall of the throttle (28), and the top block (26) is located on the side away from the slide plate (24).

4. The large-diameter pipe fitting for hydrogen pipeline based on composite plate according to claim 1, characterized in that: The three-way structure (1) includes an inner tube (11), and an outer tube (12) is fixedly connected to the outer wall of the inner tube (11).

5. The large-diameter pipe fitting for hydrogen pipeline based on composite plate according to claim 1, characterized in that: The outer wall of the top block (26) is in contact with the inner wall of the inner tube (11), and the support structure (2) is set at the tee opening of the tee structure (1).

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