Small-diameter seamless stainless steel pipe for space flight and aviation

Abstract

The small-diameter seamless stainless steel pipe is provided with a main pipe body, a first pipe body and a second pipe body, wherein the first pipe body and the second pipe body are arranged on the two sides of the main pipe body. A connecting device is arranged between the second pipe body and the adjacent first pipe body, the connecting device comprises a connecting sleeve and two locking assemblies, each locking assembly comprises two locking arms, each locking arm comprises an upper connecting arm, a connecting steel rope and a lower connecting arm, the upper connecting arms on the locking arms are rotationally connected through hinges, and the lower connecting arms on the locking arms are rotationally connected through hinges. Limiting sliding grooves are formed in the upper connecting arm and the lower connecting arm correspondingly, limiting sliding blocks are arranged at the two ends of the connecting steel cable correspondingly, reset springs are arranged in the limiting sliding grooves correspondingly and arranged on the connecting steel cable in a sleeving mode, and the two ends of each reset spring act on the limiting sliding blocks and the inner walls of the limiting sliding grooves correspondingly. The connecting sleeve, the first pipe body and the second pipe body are fixed through the locking pieces after being pressed and locked through the locking arms. The device is ingenious in structure, convenient and practical.

Description

Technical Field

[0001] This utility model relates to the field of seamless stainless steel pipes, and in particular to a small-diameter seamless stainless steel pipe for aerospace applications. Background Technology

[0002] Seamless stainless steel pipe is a material with a variety of excellent properties and is widely used in many fields. It exhibits excellent corrosion resistance, maintaining stability in various corrosive media, especially at high temperatures. This material possesses high tensile strength and yield strength while maintaining good toughness, ensuring structural integrity even under extreme conditions. Seamless stainless steel pipe has good hot and cold working properties, easily processed into various shapes and sizes to meet the needs of different fields. Even at high temperatures, seamless stainless steel pipe maintains high strength and stability, making it suitable for high-temperature working conditions.

[0003] In the process of using existing seamless stainless steel pipes, multiple stainless steel pipes often need to be spliced ​​together according to the needs of the site. In the current technology, the splicing of stainless steel pipes is generally done by welding. However, this splicing method cannot guarantee the overall sealing performance, and the disassembly after use is cumbersome and inconvenient. Summary of the Invention

[0004] The purpose of this utility model is to provide a small-diameter seamless stainless steel pipe for aerospace applications. It has an ingenious structure that enables rapid installation between adjacent main pipes and ensures sealing after installation. It also enables rapid disassembly between the main pipes, making it convenient and practical.

[0005] The technical solution to achieve the purpose of this utility model is as follows: This utility model has a main body and a first tube and a second tube disposed on both sides of the main body. The first tube and the second tube are integrally formed with the main body. The outer diameters of the first tube and the second tube are the same and both smaller than the outer diameter of the main body. A connecting device is provided between the second tube and the adjacent first tube. The connecting device includes a connecting sleeve for connecting the first tube and the second tube, and two locking components disposed on the connecting sleeve. The locking components include two rotatably connected locking arms. Each locking arm includes an upper connecting arm, a connecting steel cable, and a lower connecting arm. The upper connecting arm and the lower connecting arm are coaxially arranged. The upper connecting arm on each locking arm is rotatably connected by a hinge. Both the upper connecting arm and the lower connecting arm are provided with limiting grooves. Both ends of the connecting steel cable are provided with limiting sliders. The ends are slidably connected to the upper and lower connecting arms respectively through the cooperation of limiting sliders and limiting grooves. Each limiting groove is equipped with a return spring, and each return spring is sleeved on the connecting steel cable. The two ends of each return spring act on the inner walls of the limiting slider and the limiting groove respectively. The connecting sleeve is provided with a through groove for the upper and lower connecting arms to pass through. The first and second tubes are provided with pressing grooves for the upper and lower connecting arms to press against each other after passing through the through grooves. The side wall of the connecting sleeve is also provided with a side pressing groove for each connecting steel cable to press against each other. Each locking arm presses the connecting sleeve against the first and second tubes by rotating, and locks the connecting sleeve, the first tube and the second tube by the continuous force of each return spring. After the locking arm presses and locks the connecting sleeve against the first and second tubes, it is fixed by the locking member.

[0006] Furthermore, both sides of the connecting sleeve are provided with sealing gaskets, each of which is fitted onto the first pipe body and the second pipe body respectively. The two ends of the connecting sleeve are sealed to the two adjacent main pipe bodies through the sealing gaskets.

[0007] Furthermore, the right end face of the first tube body is provided with a first semi-circular insert and a first semi-circular slot. The first semi-circular insert is integrally formed with the first tube body. The first semi-circular insert and the first semi-circular slot are both coaxially arranged with the first tube body. The second tube body is provided with a second semi-circular slot adapted to the first semi-circular insert and a second semi-circular insert adapted to the first semi-circular slot. The first tube body and the second tube body are connected to each other through the insertion and engagement of the first semi-circular insert and the second semi-circular slot, as well as the insertion and engagement of the second semi-circular insert and the first semi-circular slot.

[0008] Furthermore, both the first and second semi-circular slots are provided with sealing gaskets. After the first semi-circular insert is inserted into the second semi-circular slot, it presses against the sealing gasket of the second semi-circular slot. After the second semi-circular insert is inserted into the first semi-circular slot, it presses against the sealing gasket of the first semi-circular slot.

[0009] Furthermore, each locking arm has an extension at its lower end, and each extension has a connecting hole. After each locking arm rotates to press the connecting sleeve against the first and second tubes, each extension is engaged with the other extensions. Each connecting hole is connected after the extensions are engaged. Each connecting hole is fitted with a locking bolt, and each locking bolt is fitted with a locking nut. After the extensions are engaged, the locking bolt passes through each connecting hole in sequence and is threadedly connected to the locking nut. Each locking arm is fixedly connected by the threaded engagement of the locking bolt and the locking nut.

[0010] This utility model has positive effects: (1) This utility model directly sets a connecting device on the first tube and the second tube, the first tube and the second tube are connected by a connecting sleeve, and are detachably fixed on the connecting sleeve by two locking arms. Each locking arm is connected by a connecting upper arm, a connecting steel cable and a connecting lower arm. The connecting steel cable is adapted to various sizes of first tube, second tube and connecting sleeve by the cooperation of limiting slider and limiting groove and the cooperation of return spring. The stability of the first tube and second tube after being connected to the connecting sleeve is ensured by the cooperation of limiting slider and limiting groove and the continuous force of each return spring. This effectively solves the problem of inconvenient installation, connection and disassembly of stainless steel pipe in the prior art. At the same time, it also ensures the stability of the connection between the first tube and second tube and the connecting sleeve during the installation and use of stainless steel pipe. On the other hand, the cooperation of the locking arms also ensures the convenience of installation and disassembly. The structure is ingenious, stable and practical.

[0011] (2) This utility model provides a sealing gasket on both sides of the connecting sleeve, and the sealing point and the connecting sleeve work together to ensure the stability of the first and second pipe bodies after they are connected to the connecting sleeve. It is convenient and practical.

[0012] (3) By setting a first semi-circular insert on the right end face of the first tube body, setting a corresponding second semi-circular slot on the second tube body, setting a second semi-circular insert on the left end face of the second tube body, and setting a corresponding first semi-circular slot on the first tube body, the present invention can effectively ensure the tightness and firmness of the connection between the first tube body and the second tube body through the cooperation of the first semi-circular insert and the second semi-circular slot, as well as the cooperation of the second semi-circular insert and the first semi-circular slot. On the one hand, it can effectively ensure the tightness and firmness of the connection between the first tube body and the second tube body, and on the other hand, it can also prevent relative rotation between the first tube body and the second tube body, further ensuring the firmness of the connection between the first tube body and the second tube body.

[0013] (4) This utility model provides a sealing gasket in the first half-arc slot and the second half-arc slot, which ensures the tightness and sealing of the connection between the first half-arc plug and the second half-arc slot, as well as between the second half-arc plug and the first half-arc slot, making it convenient and practical.

[0014] (5) This utility model provides an extension at the lower end of the locking arm, and a connecting hole is provided on the extension. Each extension is pressed together by the locking arm, and the locking bolt and locking nut are used to fix each locking arm, which further ensures the tightness and firmness of the connection between the connecting sleeve and the first tube and the second tube. Attached Figure Description

[0015] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0016] Figure 1 This is a schematic diagram of the overall structure of the small-diameter seamless stainless steel for aerospace applications in this utility model;

[0017] Figure 2 This is a cross-sectional view of the connection structure between adjacent main tubes in this utility model;

[0018] Figure 3 This is a cross-sectional view of the overall structure of the first tube in this utility model;

[0019] Figure 4 This is a cross-sectional view of the overall structure of the second tube in this utility model;

[0020] Figure 5 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 6 for Figure 2 Enlarged view of point B in the middle;

[0022] Figure 7 This is a schematic diagram of the overall structure of the connecting sleeve in this utility model;

[0023] Figure 8 This is a cross-sectional view of the overall structure of the locking assembly in this utility model. Detailed Implementation

[0024] See Figures 1 to 8This utility model comprises a main body 1, and a first tube 2 and a second tube 3 disposed on both sides of the main body 1. The first tube 2 and the second tube 3 are integrally formed with the main body 1, and their outer diameters are the same and smaller than the outer diameter of the main body 1. A connecting device is provided between the second tube 3 and the adjacent first tube 2. The connecting device includes a connecting sleeve 4 for connecting the first tube 2 and the second tube 3, and two locking assemblies disposed on the connecting sleeve 4. Each locking assembly includes two rotatably connected locking arms 5. Each locking arm 5 includes an upper connecting arm 51, a connecting steel cable 53, and a lower connecting arm 52. The upper connecting arm 51 and the lower connecting arm 52 are coaxially arranged. The upper connecting arm 51 on each locking arm 5 is rotatably connected by a hinge. Both the upper connecting arm 51 and the lower connecting arm 52 are provided with limiting grooves 511. Both ends of the connecting steel cable 53 are provided with limiting sliders 531. The two ends of the connecting steel cable 53 are connected by the limiting sliders 531 and the limiting grooves 511. The upper arm 51 and the lower arm 52 are slidably connected to each other respectively. Each limiting slide groove 511 is provided with a return spring 512. Each return spring 512 is sleeved on the connecting steel cable 53. The two ends of each return spring 512 act on the inner wall of the limiting slider 531 and the limiting slide groove 511 respectively. The connecting sleeve 4 is provided with a through groove 42 through which the upper arm 51 and the lower arm 52 can pass. The first tube 2 and the second tube 3 are both provided with connecting upper and lower arms 52 that can pass through the through groove 42. The connecting sleeve 4 has a pressing groove 11 for pressing the connecting sleeve 51 and the connecting lower arm 52. The side wall of the connecting sleeve 4 is also provided with a side pressing groove 43 for pressing each connecting steel cable 53. Each locking arm 5 presses the connecting sleeve 4 against the first tube 2 and the second tube 3 by rotating, and locks the connecting sleeve 4, the first tube 2 and the second tube 3 by the continuous force of each return spring 512. After each locking arm 5 presses and locks the connecting sleeve 4 against the first tube 2 and the second tube 3, it is fixed by the locking member.

[0025] Both sides of the connecting sleeve 4 are provided with sealing gaskets 41. Each sealing gasket 41 is respectively fitted onto the first pipe body 2 and the second pipe body 3. The two ends of the connecting sleeve 4 are sealed to the two adjacent main pipe bodies 1 through the sealing gaskets 41.

[0026] The right end face of the first tube body 2 is provided with a first semi-circular insert 22 and a first semi-circular slot 23. The first semi-circular insert 22 is integrally formed with the first tube body 2. The first semi-circular insert 22 and the first semi-circular slot 23 are both coaxially arranged with the first tube body 2. The second tube body 3 is provided with a second semi-circular slot 32 that is adapted to the first semi-circular insert 22 and a second semi-circular insert 31 that is adapted to the first semi-circular slot 23. The first tube body 2 and the second tube body 3 are connected to each other through the insertion and cooperation of the first semi-circular insert 22 and the second semi-circular slot 32, and the insertion and cooperation of the second semi-circular insert 31 and the first semi-circular slot 23.

[0027] Both the first semi-circular slot 23 and the second semi-circular slot 32 are provided with sealing gaskets 12. After the first semi-circular insert 22 is inserted into the second semi-circular slot 32, it presses against the sealing gasket 12 of the second semi-circular slot 32. After the second semi-circular insert 31 is inserted into the first semi-circular slot 23, it presses against the sealing gasket 12 of the first semi-circular slot 23.

[0028] Each locking arm 5 has an extension 54 at its lower end, and each extension 54 has a connecting hole 55. Each extension 54 is fitted together after the locking arm 5 rotates to press the connecting sleeve 4 with the first tube 2 and the second tube 3. Each connecting hole 55 is connected after the extensions 54 are fitted together. Each connecting hole 55 is fitted with a locking bolt 56, and a locking nut 57 is fitted on the locking bolt 56. After the extensions 54 are fitted together, the locking bolt 56 passes through each connecting hole 55 in sequence and is threadedly connected to the locking nut 57. Each locking arm 5 is fixedly connected by the threaded engagement of the locking bolt 56 and the locking nut 57.

[0029] The working principle of this utility model is as follows: In use, the sealing gasket 41 is first fitted onto the first tube 2 and the second tube 3. Then, the first tube 2 and the second tube 3 are inserted into the connecting sleeve 4. The sidewalls of each connecting sleeve 4 press against the sealing gasket 41 after the first tube 2 and the second tube 3 are inserted. Each locking arm 5 presses against the connecting sleeve 4. Each upper connecting arm 51 passes through the through groove 42 and presses against the pressing groove 11. Each lower connecting arm 52 passes through the through groove 42 and also presses against the pressing groove 11. Each connecting cable 53 is fixed in the side pressing groove 43. The first tube 2 and the second tube 3 are engaged through the insertion of the first semi-circular insert 22 and the second semi-circular slot 32, and through the connection between the second semi-circular insert 31 and the first semi-circular slot 23. The components are connected by a plug-in joint, and the sealing gaskets 12 in the first semi-circular slot 23 and the second semi-circular slot 32 ensure the firmness and sealing of the connection between the first tube body 2 and the second tube body 3. Each locking arm 5 rotates to press the connecting sleeve 4 against the first tube body 2 and the second tube body 3, and the continuous force of each return spring 512 locks the connecting sleeve 4, the first tube body 2 and the second tube body 3. After the locking arms 5 press and lock the connecting sleeve 4 against the first tube body 2 and the second tube body 3, they are fixed by the locking components. This effectively solves the problem of inconvenience in connecting or disassembling stainless steel pipes in the prior art, greatly improves the tightness and efficiency of the connection between stainless steel pipes, and also ensures the convenience of installation and disassembly of stainless steel pipes. It is efficient and practical.

[0030] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A small-diameter seamless stainless steel tube for aerospace applications, comprising a main body and a first tube and a second tube disposed on both sides of the main body, wherein the first tube and the second tube are integrally formed with the main body, and the outer diameters of the first tube and the second tube are the same and both smaller than the outer diameter of the main body; characterized in that: A connecting device is provided between the second pipe body and the adjacent first pipe body. The connecting device includes a connecting sleeve for connecting the first pipe body and the second pipe body, and two locking assemblies disposed on the connecting sleeve. Each locking assembly includes two rotatably connected locking arms. Each locking arm includes an upper connecting arm, a connecting steel cable, and a lower connecting arm. The upper connecting arm and the lower connecting arm are coaxially arranged. The upper connecting arm on each locking arm is rotatably connected by a hinge. Both the upper connecting arm and the lower connecting arm are provided with limiting grooves. Both ends of the connecting steel cable are provided with limiting sliders. The two ends of the connecting steel cable are slidably connected to the upper connecting arm and the lower connecting arm respectively through the cooperation of the limiting sliders and the limiting grooves. Each limiting groove is provided with a return spring. Each return spring is sleeved on the connecting steel cable, and the two ends of each return spring act on the inner wall of the limiting slider and the limiting groove, respectively. The connecting sleeve is provided with a through groove for the connecting upper arm and the connecting lower arm to pass through. The first tube and the second tube are both provided with pressing grooves for the connecting upper arm and the connecting lower arm to press against each other after passing through the through groove. The side wall of the connecting sleeve is also provided with a side pressing groove for each connecting steel cable to press against each other. Each locking arm presses the connecting sleeve against the first tube and the second tube by rotating, and locks the connecting sleeve, the first tube and the second tube by the continuous force of each return spring. After the locking arm presses and locks the connecting sleeve against the first tube and the second tube, it is fixed by the locking member.

2. The aerospace-grade small-diameter seamless stainless steel tube according to claim 1, characterized in that: Both sides of the connecting sleeve are provided with sealing gaskets, and each sealing gasket is respectively fitted onto the first pipe body and the second pipe body. The two ends of the connecting sleeve are sealed to the two adjacent main pipe bodies through the sealing gaskets.

3. The aerospace-grade small-diameter seamless stainless steel tube according to claim 2, characterized in that: The right end face of the first tube body is provided with a first semi-circular insert and a first semi-circular slot. The first semi-circular insert is integrally formed with the first tube body. The first semi-circular insert and the first semi-circular slot are both coaxially arranged with the first tube body. The second tube body is provided with a second semi-circular slot that matches the first semi-circular insert and a second semi-circular insert that matches the first semi-circular slot. The first tube body and the second tube body are connected to each other through the insertion and engagement of the first semi-circular insert and the second semi-circular slot, as well as the insertion and engagement of the second semi-circular insert and the first semi-circular slot.

4. The aerospace-grade small-diameter seamless stainless steel tube according to claim 3, characterized in that: Both the first and second semi-circular slots are equipped with sealing gaskets. After the first semi-circular insert is inserted into the second semi-circular slot, it presses against the sealing gasket of the second semi-circular slot. After the second semi-circular insert is inserted into the first semi-circular slot, it presses against the sealing gasket of the first semi-circular slot.

5. The aerospace-grade small-diameter seamless stainless steel tube according to claim 4, characterized in that: Each locking arm has an extension at its lower end, and each extension has a connecting hole. After each locking arm rotates to press the connecting sleeve against the first and second tubes, each extension is engaged. After each extension is engaged, the connecting holes are connected. Each connecting hole is fitted with a locking bolt, and each locking bolt is fitted with a locking nut. After each extension is engaged, the locking bolt passes through each connecting hole in sequence and is threadedly connected to the locking nut. Each locking arm is fixedly connected by the threaded engagement of the locking bolt and the locking nut.

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