Seamless stainless steel pipe for space flight and aviation

Abstract

The seamless stainless steel pipe is provided with a connecting pipe and a three-way pipe body, the three-way pipe body is provided with a liquid inlet pipe and a liquid outlet pipe, and the three-way pipe body is provided with a liquid inlet channel and a liquid outlet channel; first positioning blocks are arranged at the two ends of the three-way pipe body, first positioning grooves are formed in the end faces of the connecting pipes, second positioning blocks are arranged at the two ends of the connecting pipes, second positioning grooves are formed in the end faces of the three-way pipe body, the first positioning blocks and the second positioning blocks are sleeved with sealing connecting sleeves, and connecting devices are arranged on the connecting pipes. The connecting device comprises a rotating ring sleeve, a rotating protruding block, a connecting through groove and a lifting pressing block. And each connecting pipe and the three-way pipe body are fixedly connected through the insertion matching of each first positioning block and each first positioning groove, the insertion matching of each second positioning block and each second positioning groove, the driving of each rotating convex block to the lifting pressing block and the leaning pressing of the lifting pressing block to the sealing connecting sleeve. The device is ingenious in structure, convenient and practical.

Description

Technical Field

[0001] The invention relates to the field of seamless stainless steel pipes, in particular to seamless stainless steel pipes for aerospace. Background Art

[0002] Seamless stainless steel pipe is a material with many excellent properties and is widely used in many fields. Seamless stainless steel pipe has excellent corrosion resistance and can maintain stability in a variety of corrosive media, especially in high temperature environments. This material has high tensile strength and yield strength, while maintaining good toughness, and can maintain structural integrity under extreme conditions. Seamless stainless steel pipe has good hot and cold processing properties and is easy to process into various shapes and sizes to meet the needs of different fields. In high temperature environments, seamless stainless steel pipes can still maintain high strength and stability and are suitable for working conditions in high temperature environments.

[0003] During the use of existing aerospace seamless stainless steel pipes, it is often necessary to not only splice multiple stainless steel pipes for use according to on-site needs, but also to ensure that each stainless steel pipe can dissipate heat in time during use to ensure its service life. In the prior art, the splicing of stainless steel pipes is generally carried out by welding each stainless steel pipe, but such a splicing method, on the one hand, cannot guarantee the overall sealing, and on the other hand, the disassembly after the later use is completed is relatively cumbersome. At the same time, such a splicing method cannot dissipate heat for the steel pipe in time, which is very inconvenient. Summary of the invention

[0004] The purpose of the present invention is to provide a seamless stainless steel pipe for aerospace, which has an ingenious structure and can not only achieve rapid and firm connection between the various stainless steel pipes, but also simultaneously achieve connectivity between the various pipelines in the various connecting pipes, thereby achieving injection and discharge of condensate in the various connecting pipes, and achieving rapid cooling of the various connecting pipes, which is efficient and convenient.

[0005] The technical solution for achieving the purpose of the present invention is as follows: the present invention comprises relatively arranged connecting pipes and a three-way pipe body arranged between the connecting pipes, the three-way pipe body is provided with a liquid inlet pipe and a liquid outlet pipe, the three-way pipe body is provided with a liquid inlet channel connected with the liquid inlet pipe, and a liquid outlet channel connected with the liquid outlet pipe; first positioning blocks are provided at both ends of the three-way pipe body, each first positioning block is integrally formed with the three-way pipe body, a first positioning groove adapted to each first positioning block is provided on the end face of each connecting pipe, a second positioning block is integrally formed with the connecting pipe at both ends of each connecting pipe, and each connecting pipe The first positioning block and the first positioning groove are connected through the spiral first channel, and the end surface of the three-way tube body is provided with a second positioning groove corresponding to each second positioning block, and each second positioning groove is connected through the second channel, and each first positioning block and the second positioning block are both sleeved with a sealing connection sleeve, and each first positioning block is provided with a first insert tube which is integrally formed with the first positioning block and is connected with the liquid inlet channel, and each first positioning groove is provided with a first connecting tube which is integrally formed with the first positioning groove and is connected with the first channel, and each second positioning block is provided with a second insert tube which is integrally formed with the second positioning groove and is connected with the first channel, and each second positioning groove is provided with a second connecting tube which is integrally formed with the second positioning groove and is connected with the second channel, and each first insert tube is inserted into the first connecting tube after each first positioning block is inserted into the corresponding first positioning groove, and each second insert tube is inserted into the second connecting tube after each second positioning block is inserted into the corresponding second positioning groove, and each connecting tube is provided with a connecting device which can tightly connect the connecting tube and the three-way tube body, and the connecting device includes a rotating ring sleeve rotatably connected to the connecting tube and the three-way tube body, a rotating protrusion arranged on the rotating ring sleeve, and a first connecting tube arranged in each first positioning groove and The connecting through grooves on the side walls of the second positioning grooves, and the lifting and lowering pressure blocks slidably arranged in the connecting through grooves, the extension direction of each connecting through groove is perpendicular to the axis of the connecting pipe, and each rotating protrusion extends into the connecting through groove through the rotating ring sleeve to rotate the connecting pipe and the three-way pipe body and press the lifting and lowering pressure block against the sealing connecting sleeve, and each connecting pipe and the three-way pipe body are fixedly connected through the plug-in cooperation between each first positioning block and the first positioning groove, the plug-in cooperation between each second positioning block and the second positioning groove, the driving of each rotating protrusion on the lifting and lowering pressure block, and the pressure of the lifting and lowering pressure block on the sealing connecting sleeve.

[0006] Furthermore, a pressure component is provided on the side wall of each connecting through groove, and the pressure component includes a side slider fixed on the side wall of each lifting and lowering pressure block, a side slide groove arranged on the side of the connecting through groove and adapted to each side slider, a limiting slide hole arranged parallel to the extension direction of the connecting through groove, a limiting slide rod slidably arranged in the limiting slide hole, and an upper push block arranged on the limiting slide rod and capable of applying pressure to the side slider; each limiting slide hole is equipped with a first return spring, and two ends of the first return spring act on the limiting slide hole and the limiting slide rod respectively; the lifting and lowering pressure block is lifted by the cooperation of each side slider and the side slide groove, the sliding connection of the limiting slide rod and the limiting slide hole, and the continuous force of the first return spring on the limiting slide rod; after the rotating protrusion is disengaged from the lifting and lowering pressure block, each lifting and lowering pressure block is disengaged from the sealing connection sleeve.

[0007] Furthermore, the upper end of each connecting groove is provided with a guide inclined surface which is relatively arranged and can guide the rotating protrusion into or out of the connecting groove. The rotating ring sleeve and the rotating protrusion are both plastic parts. The rotating protrusion and the rotating ring sleeve are integrally formed and the cross-section of the rotating protrusion is arc-shaped. The guide inclined surface includes a first guide arc surface, a guide inclined surface, and a second guide arc surface. One end of the first guide arc surface is connected to the inner wall of the connecting groove, the other end of the first guide arc surface is connected to one end of the guide inclined surface, the other end of the guide inclined surface is connected to one end of the second guide arc surface, and the other end of the second guide arc surface is connected to the outer wall of the connecting pipe. As the rotating ring sleeve rotates, each rotating protrusion enters the connecting groove in sequence after connecting with the second guide arc surface, the guide inclined surface and the first guide arc surface.

[0008] Furthermore, a first slip ring and a second slip ring integrally formed with the rotating ring sleeve are provided on the inner wall of each rotating ring sleeve, the first slip ring and the second slip ring are coaxially arranged with the rotating ring sleeve, each rotating protrusion is located between the first slip ring and the second slip ring, the three-way tube body is provided with a second ring groove adapted to the second slip ring, the connecting pipe is provided with a first ring groove adapted to each first slip ring, the first slip ring and the second slip ring are both plastic parts integrally formed with the rotating ring sleeve, the rotating ring sleeve is rotatably connected to the connecting pipe through the matching of the first slip ring and the first ring groove, and is rotatably connected to the three-way tube body through the matching of the second slip ring and the second ring groove.

[0009] Furthermore, each rotating ring sleeve is provided with a means for fixing the rotating ring sleeve on the connecting tube, and each rotating ring sleeve is provided with a connecting hole, the axis of the connecting hole is perpendicularly arranged to the axis of the connecting tube, and a locking hole adapted to the connecting hole is provided on the outer wall of the connecting tube, and a locking rod is provided in the connecting hole, and a second reset spring is sleeved on the locking rod, and two ends of the second reset spring are respectively fixedly connected to the locking rod and the connecting hole, and the locking rod extends into the locking hole through sliding cooperation with the connecting hole and continuous force of the second reset spring, and the rotating ring sleeve is fixedly connected to the connecting tube through the plug-in cooperation of the locking rod and the locking hole.

[0010] Furthermore, each of the first connecting tubes and the second connecting tubes is provided with a sealing pressure pad, the width of the sealing pressure pad on the first connecting tube is the same as the length of the first connecting tube, the width of the sealing pressure pad on the second connecting tube is the same as the length of the second connecting tube, the sealing connection sleeve on the first positioning block is pressed against the sealing pressure pad of the first connecting tube after the first positioning block is inserted into the first positioning groove, and the sealing connection sleeve on the second positioning block is pressed against the sealing pressure pad of the second connecting tube after the second positioning block is inserted into the second positioning groove.

[0011] Furthermore, each connecting pipe is provided with an installation groove coaxially arranged with the connecting pipe, and each installation groove is arranged on the outer wall of each connecting pipe. The connecting pipe is sleeved with a high-temperature resistant sleeve, and the high-temperature resistant sleeve is sleeved in the installation groove. The high-temperature resistant sleeve is coaxially arranged with the installation groove, and the high-temperature resistant sleeve extends from one end of the installation groove to the other end of the installation groove.

[0012] Furthermore, the above-mentioned high temperature resistant sleeve includes, from the inside to the outside, a connecting rubber layer, an aluminum foil insulation layer, a high temperature resistant aerogel felt sleeve, a high temperature resistant rubber sleeve, and a high temperature resistant coating arranged on the outer wall of the high temperature resistant rubber sleeve. The high temperature resistant sleeve is fixedly installed on the connecting pipe through the cooperation of the connecting rubber layer and the installation groove.

[0013] The present invention has positive effects: (1) The present invention is connected by setting a connecting pipe and a three-way pipe body, and each connecting pipe and the three-way pipe body are fixedly connected through the plug-in cooperation of each first positioning block and the first positioning groove, the plug-in cooperation of each second positioning block and the second positioning groove, the driving of each rotating protrusion on the lifting and pressing block, and the pressing of the lifting and pressing block on the sealing connection sleeve. After the connection, the rotating protrusion extends into the connecting groove through the rotating ring sleeve to rotate the connecting pipe and the three-way pipe body and presses the lifting and pressing block on the sealing connection sleeve, thereby ensuring the tightness and sealing of the connection between each connecting pipe and the three-way pipe body. At the same time, the first connecting The plug-in cooperation between the tube and the first insert tube, and the plug-in cooperation between the second connecting tube and the second insert tube, effectively ensures the connectivity among the liquid inlet channel, the first channel, the second channel and the liquid outlet channel, and after the condensate is injected, each connecting tube and the three-way tube body is condensed, which effectively solves the high efficiency and convenience of installation and disassembly between each stainless steel tube in the prior art. At the same time, by setting the cooperation between the liquid inlet channel, the first channel, the second channel and the liquid outlet channel, the condensation of each connecting tube is guaranteed, which not only ensures the stability and efficiency of the connection between the various connecting tubes, but also can ensure the service life of each connecting tube. The structure is ingenious, efficient and convenient.

[0014] (2) The present invention sets a pressing assembly on the side wall of the connecting groove. The lifting and lowering pressure block is lifted by the cooperation of the side sliding blocks and the side sliding grooves, the sliding connection of the limiting sliding rod and the limiting sliding hole, and the continuous force of the first return spring on the limiting sliding rod. It can ensure that after the rotating protrusion is separated from the lifting and lowering pressure block, the lifting and lowering pressure block can be quickly separated from the sealing connection sleeve, thereby ensuring the smoothness of the lifting and lowering pressure block during the lifting and lowering process. At the same time, it also ensures the stability of the lifting and lowering pressure block during the lifting and lowering process. It is convenient and practical.

[0015] (3) The present invention provides a guiding bevel on the connecting groove, and configures the guiding bevel to cooperate with a first guiding arc surface, a guiding bevel and a second guiding arc surface, thereby ensuring that the rotating protrusion can smoothly and quickly enter the connecting groove and can also smoothly slide out of the connecting groove, thereby ensuring stable pressure between the rotating protrusion and the lifting and pressing block and rapid separation of the rotating protrusion and the lifting and pressing block, which is efficient and convenient.

[0016] (4) The present invention provides a first slip ring and a second slip ring on the rotating ring sleeve. The rotating ring sleeve is rotatably connected to the connecting pipe through the cooperation of the first slip ring and the first ring groove, and is rotatably connected to the three-way pipe body through the cooperation of the second slip ring and the second ring groove, thereby ensuring smooth and stable connection between the rotating ring sleeve and the connecting pipe, and between the rotating ring sleeve and the three-way pipe body.

[0017] (5) The present invention provides a connecting hole on the rotating ring sleeve. The locking rod in the connecting hole extends into the locking hole through sliding cooperation with the connecting hole and continuous force of the second return spring. The rotating ring sleeve is fixedly connected to the connecting pipe through plug-in cooperation between the locking rod and the locking hole. This not only ensures the stability and firmness of the connection between the rotating ring sleeve and the connecting pipe, but also further ensures the stability and firmness of the pressure of the lifting and lowering pressure block on the sealing connecting sleeve, thereby ensuring the firmness of the connection between the connecting pipe and the three-way pipe body.

[0018] (6) The present invention provides a sealing pad on the first connecting tube and the second connecting tube, thereby further enhancing the tightness and sealing of the first positioning block and the first positioning groove, and the second positioning block and the second positioning groove after being connected. At the same time, the first positioning block and the first positioning groove, and the second positioning block and the second positioning groove can also be further positioned after being connected.

[0019] (7) The present invention provides an installation groove on the connecting pipe and installs the high temperature resistant sleeve in the installation groove, thereby ensuring the firmness and tightness of the installation of the high temperature resistant sleeve in the installation groove, which is convenient and practical.

[0020] (8) The present invention arranges the high temperature resistant sleeve into a connecting rubber layer, an aluminum foil insulation layer, a high temperature resistant aerogel felt sleeve, a high temperature resistant rubber sleeve, and a high temperature resistant coating arranged on the outer wall of the high temperature resistant rubber sleeve. The connecting rubber layer ensures that the high temperature resistant sleeve is connected to the connecting pipe stably and firmly. By arranging the aluminum foil insulation layer, the high temperature resistant aerogel felt sleeve, the high temperature resistant rubber sleeve and the high temperature resistant coating, the heat generated by the connecting pipe during use can be prevented from being transmitted to the outside, and the external heat can also be prevented from being transmitted into the connecting pipe, thereby further ensuring the use quality and service life of the connecting pipe and the three-way pipe body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein Figure 1 This is a schematic diagram of the overall structure of the seamless stainless steel pipe for aerospace use in the present invention; Figure 2 A cross-sectional view of the overall structure of the seamless stainless steel pipe for aerospace use in the present invention; Figure 3 for Figure 2 The enlarged view of point A in the middle; Figure 4 for Figure 2 The enlarged view of point B in the middle; Figure 5 for Figure 2 Enlarged view of point C in the middle; Figure 6 for Figure 2 The enlarged view of point D in the middle; Figure 7 It is a cross-sectional view of the overall structure of the rotating ring sleeve in the present invention; Figure 8 It is a cross-sectional view of the connection structure between the rotating ring sleeve and the connecting pipe in the present invention; Fig. 9 for Figure 8 Enlarged view of point E in the middle; Fig.10 A cross-sectional view of the overall structure of the connecting pipe in the present invention; Fig.11 for Fig.10 The enlarged view of F in the middle; Fig.12 It is a cross-sectional view of the overall structure of the three-way pipe body in the present invention; Fig.13 It is a cross-sectional view of the overall structure of the high temperature resistant sleeve in the present invention. DETAILED DESCRIPTION

[0022] See Figures 1 to 13The present invention relates to a seamless stainless steel pipe for aerospace, comprising connecting pipes 1 arranged relatively to each other, and a three-way pipe body 2 arranged between each connecting pipe 1, wherein the three-way pipe body 2 is provided with a liquid inlet pipe 21 and a liquid outlet pipe 22, and the three-way pipe body 2 is provided with a liquid inlet channel 23 connected with the liquid inlet pipe 21, and a liquid outlet channel 24 connected with the liquid outlet pipe 22; both ends of the three-way pipe body 2 are provided with a first positioning block 26, each first positioning block 26 is integrally formed with the three-way pipe body 2, and the end surface of each connecting pipe 1 is provided with a first positioning groove 11 adapted to each first positioning block 26, and both ends of each connecting pipe 1 are provided with a second positioning block 13 integrally formed with the connecting pipe 1, and the first positioning block 13 on each connecting pipe 1 is provided with a first positioning block 26. The positioning block 26 and the first positioning groove 11 are connected through the spiral first channel 10. The end surface of the three-way tube body 2 is provided with a second positioning groove 28 corresponding to each second positioning block 13, and each second positioning groove 28 is connected through the second channel 25. Each first positioning block 26 and the second positioning block 13 are sleeved with a sealing connection sleeve 5. Each first positioning block 26 is provided with a first inserting pipe 261 integrally formed with the first positioning block 26 and connected to the liquid inlet channel 23. Each first positioning groove 11 is provided with a first connecting pipe 12 integrally formed with the first positioning groove 11 and connected to the first channel 10. Each second positioning block 13 is provided with a sealing connection sleeve 5 integrally formed with the second positioning block 13 and connected to the first channel 10. The second insert tube 14, each second positioning groove 28 is provided with a second connecting tube 29 which is integrally formed with the second positioning groove 28 and communicated with the second channel 25, each first insert tube 261 is inserted into the first connecting tube 12 after each first positioning block 26 is inserted into the corresponding first positioning groove 11, each second insert tube 14 is inserted into the second connecting tube 29 after each second positioning block 13 is inserted into the corresponding second positioning groove 28, and each connecting tube 1 is provided with a connecting device 7 which can tightly connect the connecting tube 1 and the three-way tube body 2, and the connecting device 7 includes a rotating ring sleeve 71 rotatably connected to the connecting tube 1 and the three-way tube body 2, a rotating protrusion 72 arranged on the rotating ring sleeve 71, and a rotating protrusion 72 arranged in each first positioning groove 11 The connecting grooves 73 on the side walls of the second positioning grooves 28, and the lifting and pressing blocks 74 slidably arranged in the connecting grooves 73, the extension direction of each connecting groove 73 is perpendicular to the axis of the connecting pipe 1, and each rotating protrusion 72 extends into the connecting grooves 73 through the rotating ring sleeve 71 to rotate the connecting pipe 1 and the three-way pipe body 2 and press the lifting and pressing blocks 74 against the sealing connection sleeve 5, and each connecting pipe 1 and the three-way pipe body 2 are fixedly connected through the plug-in cooperation between each first positioning block 26 and the first positioning groove 11, the plug-in cooperation between each second positioning block 13 and the second positioning groove 28, the driving of each rotating protrusion 72 to the lifting and pressing blocks 74, and the pressing of the lifting and pressing blocks 74 against the sealing connection sleeve 5.

[0023] The side walls of each connecting slot 73 are provided with a pressing assembly 76, which includes a side slider 761 fixed to the side wall of each lifting and pressing block 74, a side slide groove 762 arranged on the side of the connecting slot 73 and adapted to each side slider 761, a limiting slide hole 763 arranged parallel to the extension direction of the connecting slot 73, a limiting slide rod 764 slidably arranged in the limiting slide hole 763, and an upward push block 766 arranged on the limiting slide rod 764 and capable of applying pressure to the side slider 761. A first return spring 765 is provided in each hole 763, and the two ends of the first return spring 765 act on the limiting sliding hole 763 and the limiting sliding rod 764 respectively. The lifting and lowering pressure block 74 is lifted by the cooperation of each side sliding block 761 and the side sliding groove 762, the sliding connection between the limiting sliding rod 764 and the limiting sliding hole 763, and the continuous force of the first return spring 765 on the limiting sliding rod 764. After the rotating protrusion 72 is disengaged from the lifting and lowering pressure block 74, each lifting and lowering pressure block 74 is disengaged from the sealing connection sleeve 5.

[0024] The upper end of each connecting groove 73 is provided with a guide inclined surface 75 which is relatively arranged and can guide the rotating protrusion 72 into or out of the connecting groove 73. The rotating ring sleeve 71 and the rotating protrusion 72 are both plastic parts. The rotating protrusion 72 is integrally formed with the rotating ring sleeve 71 and the cross-section of the rotating protrusion 72 is in the shape of an arc. The guiding inclined surface 75 includes a first guiding arc surface 751, a guiding inclined surface 752, and a second guiding arc surface 753. One end of the first guiding arc surface 751 is connected to the inner wall of the connecting groove 73, the other end of the first guiding arc surface 751 is connected to one end of the guiding inclined surface 752, the other end of the guiding inclined surface 752 is connected to one end of the second guiding arc surface 753, and the other end of the second guiding arc surface 753 is connected to the outer wall of the connecting pipe 1. As the rotating ring sleeve 71 rotates, each rotating protrusion 72 enters the connecting groove 73 in sequence with the second guiding arc surface 753, the guiding inclined surface 752 and the first guiding arc surface 751.

[0025] A first slip ring 711 and a second slip ring 712 are provided on the inner wall of each rotating ring sleeve 71, which are integrally formed with the rotating ring sleeve 71. The first slip ring 711 and the second slip ring 712 are both coaxially arranged with the rotating ring sleeve 71, and each rotating protrusion 72 is located between the first slip ring 711 and the second slip ring 712. The three-way tube body 2 is provided with a second ring groove 27 adapted to the second slip ring 712, and the connecting pipe 1 is provided with a first ring groove 15 adapted to each first slip ring 711. The first slip ring 711 and the second slip ring 712 are both plastic parts integrally formed with the rotating ring sleeve 71. The rotating ring sleeve 71 is rotatably connected to the connecting pipe 1 through the cooperation of the first slip ring 711 and the first ring groove 15, and is rotatably connected to the three-way tube body 2 through the cooperation of the second slip ring 712 and the second ring groove 27.

[0026] Each rotating ring sleeve 71 is provided with a device for fixing the rotating ring sleeve 71 on the connecting pipe 1, and each rotating ring sleeve 71 is provided with a connecting hole 710. The axis of the connecting hole 710 is perpendicular to the axis of the connecting pipe 1, and a locking hole 16 adapted to the connecting hole 710 is provided on the outer wall of the connecting pipe 1. A locking rod 713 is provided in the connecting hole 710, and a second return spring 714 is sleeved on the locking rod 713. The two ends of the second return spring 714 are fixedly connected to the locking rod 713 and the connecting hole 710 respectively. The locking rod 713 extends into the locking hole 16 through sliding cooperation with the connecting hole 710 and continuous force of the second return spring 714, and the rotating ring sleeve 71 is fixedly connected to the connecting pipe 1 through the plug-in cooperation between the locking rod 713 and the locking hole 16.

[0027] Each of the first connecting tubes 12 and the second connecting tubes 29 is sleeved with a sealing pressure pad 6, the width of the sealing pressure pad 6 on the first connecting tube 12 is the same as the length of the first connecting tube 12, the width of the sealing pressure pad 6 on the second connecting tube 29 is the same as the length of the second connecting tube 29, the sealing connection sleeve 5 on the first positioning block 26 is pressed against the sealing pressure pad 6 of the first connecting tube 12 after the first positioning block 26 is inserted into the first positioning groove 11, and the sealing connection sleeve 5 on the second positioning block 13 is pressed against the sealing pressure pad 6 of the second connecting tube 29 after the second positioning block 13 is inserted into the second positioning groove 28.

[0028] Each connecting pipe 1 is provided with an installation groove 17 coaxially arranged with the connecting pipe 1, and each installation groove 17 is arranged on the outer wall of each connecting pipe 1. The connecting pipe 1 is sleeved with a high-temperature resistant sleeve 4, and the high-temperature resistant sleeve 4 is sleeved in the installation groove 17. The high-temperature resistant sleeve 4 is coaxially arranged with the installation groove 17, and the high-temperature resistant sleeve 4 extends from one end of the installation groove 17 to the other end of the installation groove 17.

[0029] The high temperature resistant sleeve 4 includes, from the inside to the outside, a connecting rubber layer 41, an aluminum foil insulation layer 42, a high temperature resistant aerogel felt sleeve 43, a high temperature resistant rubber sleeve 44, and a high temperature resistant coating 45 arranged on the outer wall of the high temperature resistant rubber sleeve 44. The high temperature resistant sleeve 4 is fixedly installed on the connecting pipe 1 by the cooperation between the connecting rubber layer 41 and the installation sink 17.

[0030] Working principle of the present invention: During the use of the present invention, the connecting pipe 1 is cast in the body of the connecting pipe 1 to form a spiral first channel 10. During the casting process of the connecting pipe 1, first cast half of the connecting pipe 1, then cast the other half of the connecting pipe 1, and then fix and connect the two connecting pipes 1 to form a three-way pipe body 2. Similarly, the three-way pipe body 2 is cast in the three-way pipe body 2 to form a liquid inlet channel 23, a liquid outlet channel 24 and a second channel 25. During the casting process of the three-way pipe body 2, the three-way pipe body 2 is divided into two halves for casting, and then the two halves of the three-way pipe body 2 are fixed to form the three-way pipe body 2 after demoulding. Each high-temperature resistant sleeve 4 is fixedly installed in the installation sink 17 through a connecting adhesive layer 41; Each sealing pad 6 is mounted on the first connecting tube 12 in the first positioning groove 11 and the second connecting groove in the second positioning groove 28, each sealing connecting sleeve 5 is mounted on each first positioning block 26 and the second positioning block 13, and then each connecting tube 1 is connected to the three-way pipe body 2. During the connection process, each first positioning block 26 is inserted into the corresponding first positioning groove 11, and each second positioning block 13 is inserted into the corresponding second positioning groove 28. At the same time, the first inserting tube 261 on each first positioning block 26 is inserted into the first connecting tube 12, and the second inserting tube 14 on each second positioning block 13 is inserted into the corresponding second connecting tube 29, so as to ensure that the liquid inlet channel 23, the first channel 10, the second channel 25 and the liquid outlet channel 24 are connected; During the injection molding process of each rotating sleeve 71, half of the rotating sleeve 71 is firstly injected, and then the other half of the rotating sleeve 71 is injected. After the injection molding is completed, it is installed on the connecting pipe 1 and the three-way pipe body 2, and then each rotating sleeve 71 is fixedly connected and sleeved on the connecting pipe 1 and the three-way pipe body 2; After each connecting pipe 1 is connected to the three-way pipe body 2, the rotating ring sleeve 71 is rotatably connected to the connecting pipe 1 and the three-way pipe body 2 through the cooperation of the first sliding ring 711 and the first ring groove 15, and the cooperation of the second sliding ring 712 and the second ring groove 27. During the rotation process, the rotating protrusion 72 is accompanied by the rotation of the rotating ring sleeve 71, and then enters the connecting groove 73 after the second guide arc surface 753, the guiding inclined surface 752 and the first guide arc surface 751. Before the rotating protrusion 72 is rotated into the connecting slot, the lifting and lowering block 74 is connected through the cooperation of each side slider 761 and the side slide groove 762, the sliding connection of the limiting slide rod 764 and the limiting slide hole 763, and the first return spring The continuous force of 765 on the limiting slide bar 764 lifts the lifting and lowering pressure block 74, and the rotating protrusion 72 slowly presses the lifting and lowering pressure block 74 downward after entering the connection slot. During the downward pressing process, the lifting and lowering pressure block 74 fixes the sealing connection sleeve 5 on the first positioning block 26 and the second positioning block 13. After the lifting and lowering pressure block 74 fixes and presses the sealing connection sleeve 5, the locking rod 713 extends into the locking hole 16 through the sliding cooperation with the connection hole 710 and the continuous force of the second return spring 714. The rotating ring sleeve 71 is fixedly connected to the connecting pipe 1 through the plug-in cooperation of the locking rod 713 and the locking hole 16, thereby ensuring a stable and firm connection between each connecting pipe 1 and the three-way pipe body 2; On the one hand, the present invention effectively solves the problem of complicated installation and disassembly between stainless steel pipes in the prior art. On the other hand, after the connecting pipe 1 and the three-way pipe body 2 are connected, the sealing connection sleeve 5 and the sealing pressure pad 6 are cooperated to ensure the sealing between each connecting pipe 1 and the three-way pipe body 2. At the same time, the condensate is injected after the liquid inlet channel 23, the first channel 10, the second channel 25 and the liquid outlet channel 24 are connected. The condensate enters the liquid inlet channel 23, the first insert pipe 261, the first connecting pipe 12, the first channel 10, the second insert pipe 14, the second connecting pipe 29, the second channel 25 and the liquid outlet channel 24 in turn to condense and cool the stainless steel pipe. At the same time, the heat transfer efficiency of the stainless steel pipe is also reduced by the high-temperature resistant sleeve 4, thereby ensuring the service life of each stainless steel pipe during use. The structure is ingenious and convenient and efficient.

[0031] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A seamless stainless steel pipe for aerospace, comprising relatively arranged connecting pipes and a three-way pipe body arranged between the connecting pipes, wherein the three-way pipe body is provided with a liquid inlet pipe and a liquid outlet pipe, and the three-way pipe body is provided with a liquid inlet channel connected to the liquid inlet pipe and a liquid outlet channel connected to the liquid outlet pipe; characterized in that: Both ends of the three-way tube body are provided with a first positioning block, each first positioning block is integrally formed with the three-way tube body, an end surface of each connecting tube is provided with a first positioning groove adapted to each first positioning block, both ends of each connecting tube are provided with a second positioning block integrally formed with the connecting tube, the first positioning block and the first positioning groove on each connecting tube are connected through a spiral first channel, the end surface of the three-way tube body is provided with a second positioning groove corresponding to each second positioning block, each second positioning groove is connected through the second channel, each first positioning block and the second positioning block are sleeved with a sealing connection sleeve, each first positioning block is provided with a first insert tube integrally formed with the first positioning block and connected to the liquid inlet channel, each first positioning groove is provided with a first connecting tube integrally formed with the first positioning groove and connected to the first channel, each second positioning block is provided with a second insert tube integrally formed with the second positioning block and connected to the first channel, each second positioning groove is provided with a second connecting tube integrally formed with the second positioning groove and connected to the second channel, and each first insert tube is in After each first positioning block is inserted into the corresponding first positioning groove, it is inserted into the first connecting tube, and each second inserting tube is inserted into the second connecting tube after each second positioning block is inserted into the corresponding second positioning groove. Each connecting tube is provided with a connecting device that can tightly connect the connecting tube and the three-way tube body. The connecting device includes a rotating ring sleeve rotatably connected to the connecting tube and the three-way tube body, a rotating protrusion arranged on the rotating ring sleeve, a connecting through groove arranged on the side wall of each first positioning groove and the second positioning groove, and a lifting and pressing block slidably arranged in the connecting through groove. The extension direction of each connecting through groove is arranged perpendicular to the axis of the connecting tube, and each rotating protrusion extends into the connecting through groove through the rotating ring sleeve to rotate with the connecting tube and the three-way tube body and presses the lifting and pressing block against the sealing connecting sleeve. Each connecting tube and the three-way tube body are fixedly connected through the plug-in cooperation of each first positioning block and the first positioning groove, the plug-in cooperation of each second positioning block and the second positioning groove, the driving of each rotating protrusion on the lifting and pressing block, and the pressing of the lifting and pressing block on the sealing connecting sleeve.

2. The seamless stainless steel tube for aerospace use according to claim 1, characterized in that: The side walls of each connecting groove are provided with a pressing assembly, and the pressing assembly includes a side slider fixed on the side wall of each lifting and lowering pressure block, a side slide groove arranged on the side of the connecting groove and adapted to each side slider, a limiting slide hole arranged parallel to the extension direction of the connecting groove, a limiting slide rod slidably arranged in the limiting slide hole, and an upper push block arranged on the limiting slide rod and capable of applying pressure to the side slider. Each limiting slide hole is equipped with a first return spring, and two ends of the first return spring act on the limiting slide hole and the limiting slide rod respectively. The lifting and lowering pressure block is lifted by the cooperation of each side slider and the side slide groove, the sliding connection of the limiting slide rod and the limiting slide hole, and the continuous force of the first return spring on the limiting slide rod. After the rotating protrusion is separated from the lifting and lowering pressure block, each lifting and lowering pressure block is separated from the sealing connection sleeve.

3. The seamless stainless steel tube for aerospace use according to claim 2, characterized in that: The upper end of each connecting groove is provided with a guide inclined surface which is relatively arranged and can guide the rotating protrusion into or out of the connecting groove. The rotating ring sleeve and the rotating protrusion are both plastic parts. The rotating protrusion and the rotating ring sleeve are integrally formed and the cross-section of the rotating protrusion is arc-shaped. The guide inclined surface includes a first guide arc surface, a guide inclined surface, and a second guide arc surface. One end of the first guide arc surface is connected to the inner wall of the connecting groove, the other end of the first guide arc surface is connected to one end of the guide inclined surface, the other end of the guide inclined surface is connected to one end of the second guide arc surface, and the other end of the second guide arc surface is connected to the outer wall of the connecting pipe. As the rotating ring sleeve rotates, each rotating protrusion enters the connecting groove in sequence after connecting with the second guide arc surface, the guide inclined surface and the first guide arc surface.

4. The seamless stainless steel tube for aerospace use according to claim 3, characterized in that: A first slip ring and a second slip ring integrally formed with the rotating ring sleeve are provided on the inner wall of each rotating ring sleeve, the first slip ring and the second slip ring are both coaxially arranged with the rotating ring sleeve, each rotating protrusion is located between the first slip ring and the second slip ring, a second ring groove adapted to the second slip ring is provided on the three-way tube body, and a first ring groove adapted to each first slip ring is provided on the connecting pipe, the first slip ring and the second slip ring are both plastic parts integrally formed with the rotating ring sleeve, the rotating ring sleeve is rotatably connected to the connecting pipe through the matching of the first slip ring and the first ring groove, and is rotatably connected to the three-way tube body through the matching of the second slip ring and the second ring groove.

5. The seamless stainless steel tube for aerospace use according to claim 4, characterized in that: Each rotating ring sleeve is provided with a device for fixing the rotating ring sleeve on the connecting tube, and each rotating ring sleeve is provided with a connecting hole. The axis of the connecting hole is perpendicular to the axis of the connecting tube, and a locking hole adapted to the connecting hole is provided on the outer wall of the connecting tube. A locking rod is provided in the connecting hole, and a second return spring is sleeved on the locking rod. Two ends of the second return spring are respectively fixedly connected to the locking rod and the connecting hole, and the locking rod extends into the locking hole through sliding cooperation with the connecting hole and continuous force of the second return spring, and the rotating ring sleeve is fixedly connected to the connecting tube through plug-in cooperation between the locking rod and the locking hole.

6. The seamless stainless steel tube for aerospace use according to claim 5, characterized in that: Each of the first connecting tubes and the second connecting tubes is provided with a sealing pressure pad, the width of the sealing pressure pad on the first connecting tube is the same as the length of the first connecting tube, the width of the sealing pressure pad on the second connecting tube is the same as the length of the second connecting tube, the sealing connection sleeve on the first positioning block is pressed against the sealing pressure pad of the first connecting tube after the first positioning block is inserted into the first positioning groove, and the sealing connection sleeve on the second positioning block is pressed against the sealing pressure pad of the second connecting tube after the second positioning block is inserted into the second positioning groove.

7. The seamless stainless steel tube for aerospace use according to claim 6, characterized in that: Each connecting pipe is provided with an installation groove coaxially arranged with the connecting pipe, and each installation groove is arranged on the outer wall of each connecting pipe. The connecting pipe is sleeved with a high-temperature resistant sleeve, and the high-temperature resistant sleeve is sleeved in the installation groove. The high-temperature resistant sleeve is coaxially arranged with the installation groove, and the high-temperature resistant sleeve extends from one end of the installation groove to the other end of the installation groove.

8. The seamless stainless steel tube for aerospace use according to claim 7, characterized in that: The high temperature resistant sleeve includes, from the inside to the outside, a connecting rubber layer, an aluminum foil insulation layer, a high temperature resistant aerogel felt sleeve, a high temperature resistant rubber sleeve, and a high temperature resistant coating arranged on the outer wall of the high temperature resistant rubber sleeve. The high temperature resistant sleeve is fixedly installed on the connecting pipe through the cooperation of the connecting rubber layer and the installation sink.

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