A cryogenic multi-fluid delivery device

Abstract

The application discloses a low-temperature multi-fluid conveying device, which comprises a plurality of sequentially connected bend pipe sections, adjacent bend pipe sections are fixed through connecting bellows, the bend pipe section comprises an outer pipe, a cold screen assembly, a multi-pipe assembly and a strong fixed support assembly, the strong fixed support assembly is fixedly connected with the multi-pipe assembly, the cold screen assembly is sleeved outside the strong fixed support assembly and the multi-pipe assembly and is fixedly matched with the strong fixed support assembly and the multi-pipe assembly, and the outer pipe is sleeved outside the cold screen assembly and is slidably matched with the cold screen assembly. In the application, the cold contraction sliding of the bend pipe section can be met through the arrangement of the connecting bellows, the strong fixed support assembly can be used for resisting the thrust generated by the connecting bellows, the waist hole is arranged on the cylinder of the strong fixed support assembly to prolong the heat transfer path of the cold screen assembly, the strong fixed support assembly and the multi-pipe assembly can be abutted through the thrust generated by the telescopic bellows, and compared with the conventional welding connection, the heat leakage is reduced.

Description

Technical Field

[0001] This invention relates to the field of cryogenic pipeline technology, and more specifically to a cryogenic multi-fluid transport device. Background Technology

[0002] As the most important component of a superconducting particle accelerator, the cryostat provides liquid helium and mechanical support for the superconducting cavity and superconducting magnets, realizes and maintains the temperature and pressure environment required for the normal operation of superconducting components, and forms thermal shielding and thermal isolation to reduce the overall thermal load of the system. Its performance directly determines the investment and operating costs of the entire cryogenic accelerator system.

[0003] The refrigerant pressure inside the thermostat is introduced from the outside through the pipeline. However, the existing pipeline has a large diameter and multiple channels with a large thrust due to the addition of corrugated pipes. While it can achieve good strength through fixed support, high strength usually leads to large heat leakage. How to reduce heat leakage while meeting the strength requirements of multi-channel pipelines has become an urgent technical problem to be solved.

[0004] Existing patent document CN113217718A discloses a novel multi-channel cryogenic transmission pipeline, including a cold shield cylinder, a first convex strip, a positioning component, and a second convex strip. Multiple first and second convex strips are fixedly arranged circumferentially along the central axis of the cold shield cylinder, spaced apart. The length direction of the first and second convex strips is parallel to the central axis of the cold shield cylinder. The outer edges of the first and second convex strips extend outward from the cold shield cylinder. Its advantages are: the mechanical strength of the cold shield cylinder is greatly increased through localized protrusions, while effectively reducing the thickness of the cold shield cylinder, achieving lightweighting of the cold shield cylinder while meeting mechanical strength requirements, reducing material costs, and improving production efficiency.

[0005] However, it cannot satisfy the requirements of cold shrinkage sliding and simultaneously reduce heat leakage during cold screen transmission. Summary of the Invention

[0006] The technical problem to be solved by this invention is how to reduce heat leakage while meeting the requirements of a low-temperature multi-fluid transport device.

[0007] The present invention solves the above-mentioned technical problems through the following technical means: a low-temperature multi-fluid conveying device, comprising multiple sequentially connected bent pipe sections, adjacent bent pipe sections being connected by connecting corrugated pipes, each bent pipe section comprising an outer pipe, a cold shield assembly, a multi-pipe assembly, and a strong fixed support assembly, the strong fixed support assembly being fixedly connected to the multi-pipe assembly, the cold shield assembly being sleeved on the outside of the strong fixed support assembly and the multi-pipe assembly and being fixedly engaged with them, the outer pipe being sleeved on the outside of the cold shield assembly and being slidably engaged with it, the strong fixed support assembly being used to resist the thrust generated by the connecting corrugated pipe and to reduce solid conduction heat leakage;

[0008] The strong fixed support assembly includes a strong fixed support cylinder with multiple waist holes to extend the heat transfer path of the cold screen assembly; one end of the strong fixed support assembly is pressed against the multi-tube assembly, and the other end is fixedly connected to the multi-tube assembly through a connecting assembly.

[0009] The corrugated pipe connection allows for the cold contraction and sliding of the bend section. The strong fixed support assembly can resist the thrust generated by the corrugated pipe connection. At the same time, the waist hole on its cylinder extends the heat transfer path of the cold shield assembly. The thrust generated by the telescopic corrugated pipe can abut the strong fixed support assembly and the multi-pipe assembly, which reduces heat leakage compared to conventional welding connections.

[0010] As a preferred technical solution, the connecting assembly includes a left flange, a middle flange, a right flange, and a G10 support plate. The left flange is fixedly connected to one end of the middle flange via the G10 support plate, and the other end of the middle flange is fixedly connected to the middle flange via the G10 support plate. The middle flange is fixedly connected to the cold shield assembly, and the multi-pipe assembly passes through the connecting assembly and is connected and fastened to it.

[0011] As a preferred technical solution, the multi-pipe assembly includes a first main pipe, a second main pipe, a first branch pipe, a second branch pipe, and a third branch pipe. The second main pipe, the first branch pipe, the second branch pipe, and the third branch pipe are all arranged around the outside of the first main pipe, and they are all arranged in parallel with gaps. The first main pipe and the second main pipe are the air inlet and air outlet pipes, respectively.

[0012] As a preferred technical solution, the strong fixed support assembly further includes a strong fixed support inner sleeve. The right flange is fixedly connected to a strong fixed support inner sleeve adapted to the first main pipe, the second main pipe, the first branch pipe, and the second branch pipe, and respectively press against the first main pipe, the second main pipe, the first branch pipe, and the second branch pipe. The strong fixed support cylinder is fixedly connected to the left flange.

[0013] As a preferred technical solution, the third branch pipe is welded and fixed to the right flange. A copper hoop is fixedly connected to the end face of the right flange. The copper hoop is sleeved on the outside of the third branch pipe. The right flange is pressed against the first main pipe, the second main pipe, the first branch pipe, and the second branch pipe through the strong fixed support inner sleeve. The copper hoop sleeved on the outside of the third branch pipe can transfer the cold energy on the third branch pipe to the right flange through the copper hoop, thereby enhancing the cold energy transfer and further reducing the solid heat leakage of other strong fixed support inner sleeves.

[0014] As a preferred technical solution, one end of the strong fixed support inner sleeve is welded and fixed to the left flange, and the other end is fixedly connected to the left end flange. The first main pipe is fixedly connected to the outside of the first main pipe flange, and the left end flange is connected and fastened to the first main pipe flange through a G10 support ring.

[0015] As a preferred technical solution, the multi-pipe assembly is further provided with a pipe sliding support assembly, which includes a first support plate, a second support plate, a third support plate, and a support connecting rod. The first support plate, the second support plate, and the third support plate are coaxially arranged and fixedly connected by the support connecting rod. The first support plate, the second support plate, and the third support plate are all provided with mounting holes that are compatible with the multi-pipe assembly.

[0016] As a preferred technical solution, the first support plate, the second support plate, and the third support plate are all provided with through holes adapted to the first main pipe. The inner tube of the main pipe is fixedly connected to the through hole of the first support plate by three fixed support blocks and is welded to the first main pipe through the inner tube of the main pipe. The first support plate and the third support plate are respectively fixedly connected with main pipe mounting rings adapted to the second main pipe and slide with the rings. The second support plate is fixedly connected with branch pipe mounting rings for installing three branch pipes.

[0017] The sliding support assembly allows for the cold shrinkage and sliding of multi-pipe assemblies. By removing the sleeve from the second main pipe, the heat leakage of the second main pipe can be increased, thereby reducing the heat leakage of the first main pipe. Since the diameter of the first main pipe is larger than that of the second main pipe, the overall heat leakage is reduced. The first main pipe is fixed, and the second main pipe, the first branch pipe, the second branch pipe, and the third branch pipe are slidably connected. At low temperatures, the cooling order and final temperature of different pipes are different, so the order and amount of cold shrinkage and sliding are also different, thus meeting the cold shrinkage and sliding requirements of different pipes.

[0018] As a preferred technical solution, the cold shield assembly includes a first cold shield cylinder, a second universal ball joint, a second cold shield cylinder, and a cold shield return air pipe. The first cold shield cylinder and the second cold shield cylinder are welded and fixed at both ends of the middle flange, respectively. Cold shield return air pipes are installed on both the first cold shield cylinder and the second cold shield cylinder. The third branch pipe forms a loop with the cold shield inlet pipe and the cold shield return air pipe. The cold shield return air pipe passes through the strong fixed support assembly.

[0019] As a preferred technical solution, both the first and second cold screen cylinders are provided with comb grooves. The comb grooves include a cold screen return air pipe installation groove and slots. The cold screen return air pipe installation groove is adapted to the size of the cold screen return air pipe, and multiple slots are provided along its setting direction. Multiple comb grooves are connected to form an elongated notch to accommodate the installation of the cold screen return air pipe. The first and second cold screen cylinders abut against the outer pipe through a second universal ball joint set in their circumference.

[0020] The advantages of this invention are:

[0021] (1) In this invention, the setting of connecting bellows can satisfy the cold shrinkage and sliding of the bent pipe section. The strong fixed support component can be used to resist the thrust generated by the connecting bellows. At the same time, the heat transfer path of the cold screen component is extended by opening waist holes on its cylinder. The thrust generated by the telescopic bellows can abut the strong sliding support component and the multi-pipe component. Compared with conventional welding connection, heat leakage is reduced.

[0022] (2) In this invention, the right flange is welded and fixed to the first main pipe, the second main pipe, the first branch pipe and the second branch pipe through a strong fixed support inner sleeve, while the copper hoop is sleeved on the outside of the third branch pipe. The copper hoop can transfer the cold energy on the third branch pipe to the right flange to enhance the cold energy transfer and further reduce the solid heat leakage of other strong fixed support inner sleeves.

[0023] (3) In this invention, the sliding support assembly can meet the cold shrinkage sliding of the multi-pipe assembly. The second main pipe can be de-sleeved to increase the heat leakage of the second main pipe, thereby reducing the heat leakage of the first main pipe. Since the diameter of the first main pipe is larger than that of the second main pipe, the overall heat leakage is reduced. The first main pipe is fixed, and the second main pipe, the first branch pipe, the second branch pipe, and the third branch pipe are slidably connected. At low temperature, the cooling order of different pipes is different, and the final temperature is different. The order and amount of cold shrinkage sliding are different, thereby meeting the cold shrinkage requirements of different pipes.

[0024] (4) In this invention, by setting the comb groove, not only can the stress deformation during the welding process be reduced, but the cold shrinkage of the cold screen at low temperature can also be compensated. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a cryogenic multi-fluid conveying device provided in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the outer tube structure of a cryogenic multi-fluid transport device provided in an embodiment of the present invention;

[0027] Figure 3 A cryogenic multi-fluid transport device provided in an embodiment of the present invention Figure 2 A schematic diagram of the CC local magnified structure;

[0028] Figure 4 This is a schematic diagram of the bent pipe section structure of a cryogenic multi-fluid conveying device provided in an embodiment of the present invention;

[0029] Figure 5 A schematic diagram of the cold shield return gas pipeline structure of a cryogenic multi-fluid conveying device provided in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of an extended support ring structure for a cryogenic multi-fluid transport device provided in an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of a strong fixed support component structure for a cryogenic multi-fluid conveying device provided in an embodiment of the present invention;

[0032] Figure 8 A schematic diagram of a pipeline sliding support assembly for a cryogenic multi-fluid transport device provided in an embodiment of the present invention;

[0033] Figure 9 This is a schematic diagram of the main pipe inner tube structure of a cryogenic multi-fluid transport device provided in an embodiment of the present invention;

[0034] Figure 10 A schematic diagram of the inner pipe structure of a branch pipe of a cryogenic multi-fluid conveying device provided in an embodiment of the present invention;

[0035] Figure 11 This is a schematic diagram of a strong fixed support component structure for a cryogenic multi-fluid conveying device provided in an embodiment of the present invention;

[0036] Figure 12 This is a schematic diagram of the bent pipe structure of a cryogenic multi-fluid conveying device provided in an embodiment of the present invention;

[0037] Figure 13 A cryogenic multi-fluid transport device provided in an embodiment of the present invention Figure 12 A magnified schematic diagram of the DD local structure;

[0038] Figure 14 This is a schematic diagram of the comb groove structure of a cryogenic multi-fluid conveying device provided in an embodiment of the present invention;

[0039] Figure 15 This is a schematic diagram of the first cold shield cylinder structure of a cryogenic multi-fluid conveying device provided in an embodiment of the present invention;

[0040] Figure 16 This is a schematic diagram of the connecting bellows structure of a cryogenic multi-fluid conveying device provided in an embodiment of the present invention;

[0041] Reference numerals: 17. Comb groove; 171. Cold screen return air pipe mounting groove; 172. Slot; 19. Outer pipe; 20. Cold screen assembly; 2001. First cold screen cylinder; 2002. Second universal ball joint; 2003. Second cold screen cylinder; 2004. Cold screen return air pipe; 21. Pipeline sliding support assembly; 2101. First support plate; 2102. Second support plate; 2103. Third support plate; 2104. First universal ball joint; 2105. Main pipe mounting ring; 2106. Branch pipe mounting ring; 2107. Main pipe inner pipe; 2108. Branch pipe inner pipe; 2109. Support connecting rod; 2110. Fixed support block; 22. Strong fixed support assembly; 2201. Strong fixed support cylinder; 2202. Left flange; 2203. Middle flange; 2204. Right flange; 2205. G10 support plate; 2206. Extended support ring; 2207. Strong fixed support inner sleeve; 2208. G10 support ring; 2209. Left end flange; 2210. First main pipe flange; 2211. Copper hoop; 23. Multi-pipe assembly; 2301. First main pipe; 2302. Second main pipe; 2303. First branch pipe; 2304. Second branch pipe; 2305. Third branch pipe; 24. Connecting bellows; 2401. Guide sleeve; 25. Bend connecting pipe. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] See Figures 1-6 A cryogenic multi-fluid conveying device includes a multi-fluid conveying device connecting pipeline. The multi-fluid conveying device connecting pipeline includes multiple sequentially connected bends. The central pipes of adjacent bends are welded and fixed by connecting corrugated pipes 24. Each bend includes an outer pipe 19, a cold shield assembly 20, a pipeline sliding support assembly 21, a strong fixed support assembly 22, and a multi-pipe assembly 23. The multi-pipe assembly 23 includes multiple pipelines, which are L-shaped. The multi-pipe assembly 23 is provided with pipeline sliding support 21 and strong fixed support assembly 22. Each bend includes a vertically fixed first straight pipe section and a second straight pipe section. The length of the first straight pipe section is greater than that of the second straight pipe section. The first straight pipe section is provided with two pipeline sliding support assemblies 21 and one strong fixed support assembly 22. The second straight pipe section is provided with one pipeline sliding support assembly 21 and one strong fixed support assembly 22.

[0044] See Figure 5The pipeline sliding support assembly 21 is provided with a fixed part and a sliding part. The fixed part is fixedly connected to one pipeline, and the sliding part is slidably engaged with the other pipelines. The rigid fixed support assembly 22 is fixedly connected to the cold screen assembly 20. The cold screen assembly 20 is wrapped around the outside of the multi-pipe assembly 23. The pipeline sliding support assembly 21 is fixed to the inner wall of the cold screen assembly 20 through multiple first universal balls 2104. An outer tube 19 is sleeved on the outside of the cold screen assembly 20. Multiple second universal balls 2002 are arranged circumferentially on the cold screen assembly 20 and are fixed to the inner wall of the outer tube 19 through them.

[0045] See Figure 6 , Figure 7 The pipeline includes main pipes and branch pipes. The main pipes are inlet and outlet pipes, namely the first main pipe 2301 and the second main pipe 2302. The diameter of the first main pipe 2301 is larger than that of the second main pipe 2302. The branch pipes include the first branch pipe 2303, the second branch pipe 2304, and the third branch pipe 2305. The first branch pipe 2303, the second main pipe 2302, the second branch pipe 2304, and the third branch pipe 2305 are arranged in sequence around the first branch pipe 2303 to the outside.

[0046] See Figure 8 , Figure 9 , Figure 10 The pipeline sliding support assembly 21 includes a first support plate 2101, a second support plate 2102, a third support plate 2103, a first universal ball joint 2104, a main pipe mounting ring 2105, a branch pipe mounting ring 2106, a main pipe inner tube 2107, a branch pipe inner tube 2108, a support connecting rod 2109, and a fixed support block 2110. The first support plate 2101, the second support plate 2102, and the third support plate 2103 are coaxially distributed and are all annular structures. A through hole adapted to the first main pipe 2301 is opened in the center of each ring. The first support plate 2101, the second support plate 2102, and the third support plate 2103 are connected and fixed by the support connecting rod 2109. The support connecting rod 2110... 9 passes through the first support plate 2101, the second support plate 2102, and the third support plate 2103 respectively, and is connected and fastened to the first support plate 2101, the second support plate 2102, and the third support plate 2103 by bolts. The first support plate 2101 and the third support plate 2103 are respectively fixedly connected with main pipe mounting rings 2105 adapted to the second main pipe 2302. The second support plate 2102 is provided with a mounting groove for the second main pipe 2302 to be installed. The second support plate 2102 is fixedly connected with branch pipe mounting rings 2106 for installing three branch pipes, wherein one branch pipe mounting ring 2106 is located on the left side of the mounting groove, and the other two branch pipe mounting rings 2106 are located on the right side of the mounting groove.

[0047] See Figure 8The main pipe inner tube 2107 is fixedly connected to the through hole of the first support plate 2101 by three fixed support blocks 2110. The three fixed support blocks 2110 are welded to the main pipe inner tube 2107 to prevent the entire pipeline sliding support assembly 21 from rotating and to ensure the relative coordinate position of each pipe. The main pipe inner tube 2107 is welded and fixed to the first main pipe 2301. The second main pipe 2302 is slidably engaged with the main pipe mounting ring 2105 and the mounting groove. The three branch pipe mounting rings 2106 of the second support plate 2102 are all fixedly connected with the branch pipe inner tubes 2108. The first branch pipe 2303, the second branch pipe 2304, and the third branch pipe 2305 are slidably engaged with the branch pipe inner tubes 2108 respectively. The second support plate 2102 is circumferentially abutted against the first cold shield cylinder 2001 by four first universal balls 2104.

[0048] It should be noted that the first main pipe 2301 and the second main pipe 2302 are inlet and outlet pipes, and their heat leakage is particularly critical, as they have the lowest temperatures. Considering the heat leakage of both pipes together, the first main pipe 2301 is welded and fixed to the first support plate 2101 and the third support plate 2103 via the inner pipe 2107. The second support plate 2102 does not contact the inner pipe 2107, thus preventing heat leakage. The first support plate 2101 and the third support plate 2103 provide sliding support for the second main pipe 2302 via the main pipe mounting ring 2105, without adding a sleeve. Since heat leakage exists at the connection point of the sliding support in the pipeline, the second main pipe 2302 is left unsleeved, allowing the second main pipe... The heat leakage of 2302 will be slightly larger, but the heat leakage of the first main pipe 2301 with a large diameter will be reduced. The total heat leakage of the first main pipe 2301 and the second main pipe 2302 will be smaller, thereby reducing the heat leakage of the multi-pipe assembly 23. Since the cooling of different pipes has a sequence and the final temperature is different, the sequence and amount of sliding of the cold contraction are different. Therefore, the first main pipe 2301 is fixed, and the second main pipe 2302, the first branch pipe 2303, the second branch pipe 2304, and the third branch pipe 2305 are slidably connected. The third branch pipe 2305 is the cold screen 35k air inlet pipe and the cold screen return pipe 2004 to form a loop. The first main pipe 2301 is the air outlet pipe, and the second main pipe 2302 is the air inlet pipe.

[0049] See Figure 11The strong fixed support assembly 22 can not only resist the thrust generated by the high pressure inside the connecting bellows 24, but also extend the heat transfer path, increase the heat transfer distance, and reduce heat leakage through solid conduction, thereby reducing heat leakage of the first cold shield cylinder 2001. The strong fixed support assembly 22 includes a strong fixed support cylinder 2201, a left flange 2202, a middle flange 2203, a right flange 2204, a G10 support plate 2205, and an extension support ring 2206. The left end of the strong fixed support cylinder 2201 is welded and fixed to the outer pipe 19. The strong fixed support cylinder 2201 is a barrel-shaped structure with a central through-hole. The strong fixed support cylinder 2201 has multiple waist holes in its circumference. Through the multiple waist holes, the heat transfer distance is extended, connecting... The connecting assembly includes three linearly distributed flanges and a G10 support plate 2205, namely a left flange 2202, a middle flange 2203, and a right flange 2204. One end of the left flange 2202 is fixedly connected to the right end of the strong fixed support cylinder 2201. The left flange 2202 and the middle flange 2203, and the middle flange 2203 and the right flange 2204 are all welded and fixed by the G10 support plate 2205. The left end of the middle flange 2203 is welded and fixed to the second cold shield cylinder 2003, and the right end of the middle flange 2203 is welded and fixed to the first cold shield cylinder 2001 by an extension support ring 2206. The middle flange 2203 is made of aluminum, while the left flange 2202 and the right flange 2204 are made of stainless steel.

[0050] It should be noted that the G10 support plate 2205 has poor thermal conductivity. Since the middle flange 2203 is welded and fixed to the cold shield assembly 20, its temperature is basically the same as that of the cold shield assembly 20. Since the right flange 2204 is welded and fixed to the first main pipe 2301, due to the low temperature of the inner pipe, the right flange 2204 will be lower than the cold shield assembly 20, and the left flange 2202 will be higher than the cold shield assembly 20. If the three flanges are combined into one main flange, the temperature difference between the inner pipe and the main flange will be large, and the temperature difference between the room temperature end and this flange will also be large. If the temperature difference is large, the heat leakage will be large. The first cold shield cylinder 2001 is welded and fixed to the middle flange 2203 by extending the support ring 2206, which can wrap around the right flange 2204, thereby reducing heat leakage.

[0051] See Figure 12 , Figure 13The left end of the inner sleeve 2207 of the strong fixed support is pressed against the inner sleeve 2207 of the strong fixed support by the G10 support ring 2208. The left end flange 2209 is fixedly connected to the left end of the inner sleeve 2207 of the strong fixed support. The first main pipe flange 2210 is fixedly connected to the first main pipe 2301. The first main pipe flange 2210 is fixedly connected to the left end flange 2209 by the G10 support ring 2208. Since the G10 support ring 2208, the inner sleeve 2207 of the strong fixed support, and the first main pipe 2301 are concentric, the thrust of the connecting bellows 24 is directed towards the left end of the strong fixed support. Therefore, the first main pipe flange 2210 is pressed and fixed to the left end flange 2209 by the G10 support ring 2208. The heat conduction effect of this contact is worse than that of welding, thus reducing heat leakage.

[0052] See Figure 11 The first main pipe 2301 is press-fitted with the inner sleeve 2207 of the strong fixed support. The second main pipe 2302, the first branch pipe 2303, and the second branch pipe 2304 are press-fitted with the right flange 2204 through the inner sleeve 2207 of the strong fixed support. The press-fit structure is the same as that described above, so it will not be repeated. The third branch pipe 2305 is welded and fixed to the right flange 2204. The end face of the right flange 2204 is fixedly connected with a copper hoop 2211. The copper hoop 2211 is sleeved on the outside of the third branch pipe 2305. The air inlet temperature of the third branch pipe 2305 will be slightly lower. Through the copper hoop 2211, some cold air can be taken from this pipe to cool the right flange 2204. This can further reduce the solid heat leakage of the other inner sleeves 2207 of the strong fixed support.

[0053] See Figure 5 , Figure 14 , Figure 15 The cold shield assembly 20 includes a first cold shield cylinder 2001, a second universal ball joint 2002, a second cold shield cylinder 2003, and a cold shield return air pipe 2004. Both the first cold shield cylinder 2001 and the second cold shield cylinder 2003 are provided with comb-tooth grooves 17. The comb-tooth grooves 17 not only reduce stress deformation during welding but also compensate for the cold shrinkage of the cold shield assembly 20 at low temperatures. The comb-tooth grooves 17 include a cold shield return air pipe mounting groove 171 and a slot 172. The cold shield return air pipe mounting groove 171 connects to the cold shield return air pipe 2004. The dimensions of 004 ​​are compatible, and multiple comb grooves 17 are connected to form a long strip-shaped notch to accommodate the installation of the cold screen return gas pipe 2004. The cold screen return gas pipe 2004 is welded and fixed in the notch. The first cold screen cylinder 2001 and the second cold screen cylinder 2003 are circumferentially fixedly connected with four second universal balls 2002, and abut against the inner wall of the outer pipe 19 through the second universal balls 2002. The first cold screen cylinder 2001 is welded and fixed to the right end of the strong fixed support cylinder 2201, and the second cold screen cylinder 2003 is welded and fixed to the middle flange 2203.

[0054] See Figure 12 , Figure 16 Both ends of the connecting corrugated pipe 24 are fixedly connected with guide sleeves 2401. The two guide sleeves 2401 are respectively welded and fixed to the two connected first branch pipes 2303. The outer pipe 19 is made of stainless steel. The connecting corrugated pipe 24 is covered with a connecting section cold screen. The connecting section cold screen is covered with a bent connecting pipe 25. The bent connecting pipe 25 is made of stainless steel. The bent connecting pipe 25 is welded and fixed to the outer pipe 19. The connecting section cold screen is fixedly connected to the first cold screen cylinder 2001.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cryogenic multi-fluid conveying device, characterized in that, It includes multiple sequentially connected bends, adjacent bends are connected by connecting corrugated pipes, each bend includes an outer pipe, a cold shield assembly, a multi-pipe assembly, and a strong fixed support assembly. The cold shield assembly is sleeved on the outside of the strong fixed support assembly and the multi-pipe assembly and is fixedly engaged with them. The outer pipe is sleeved on the outside of the cold shield assembly and is slidably engaged with it. The strong fixed support assembly is used to resist the thrust generated by the connecting corrugated pipe and can reduce solid conduction heat leakage. The rigid support assembly includes a rigid support cylinder, a rigid support inner sleeve, and a connecting assembly. The rigid support cylinder has multiple waist holes to extend the heat transfer path of the cold shield assembly. The connecting assembly includes a left flange, a middle flange, a right flange, and a G10 support plate. The left flange is fixedly connected to one end of the middle flange via the G10 support plate, and the other end of the middle flange is fixedly connected to the right flange via the G10 support plate. The middle flange is fixedly connected to the cold shield assembly. The multi-pipe assembly passes through the connecting assembly and is connected and fastened to it. The multi-pipe assembly includes a first main pipe, a second main pipe, a first branch pipe, a second branch pipe, and a third branch pipe. The left end of the rigid support cylinder is welded and fixed to the outer pipe, and the right flange is welded and fixed to the first main pipe. The inner sleeve of the rigid support assembly is respectively press-fitted with the second main pipe, the first branch pipe, and the second branch pipe.

2. The cryogenic multi-fluid conveying device according to claim 1, characterized in that, The second main pipe, the first branch pipe, the second branch pipe, and the third branch pipe are all arranged around the outside of the first main pipe, and they are all arranged in parallel with gaps. The first main pipe and the second main pipe are the air inlet and air outlet pipes, respectively.

3. The cryogenic multi-fluid conveying device according to claim 2, characterized in that, The right flange is fixedly connected to a strong fixed support inner sleeve that is compatible with the first main pipe, the second main pipe, the first branch pipe, and the second branch pipe, and the strong fixed support cylinder is fixedly connected to the left flange.

4. The cryogenic multi-fluid conveying device according to claim 3, characterized in that, The third branch pipe is welded and fixed to the right flange, and a copper hoop is fixedly connected to the end face of the right flange, with the copper hoop sleeved on the outside of the third branch pipe.

5. A cryogenic multi-fluid conveying device according to claim 3, characterized in that, One end of the strong fixed support inner sleeve is welded and fixed to the left flange, and the other end is fixedly connected to the left end flange. The first main pipe is fixedly connected to the outside of the first main pipe flange. The left end flange is connected and fastened to the first main pipe flange through a G10 support ring.

6. A cryogenic multi-fluid conveying device according to claim 2, characterized in that, The multi-pipe assembly is further provided with a pipe sliding support assembly, which includes a first support plate, a second support plate, a third support plate, and a support connecting rod. The first support plate, the second support plate, and the third support plate are coaxially arranged and fixedly connected by the support connecting rod. The first support plate, the second support plate, and the third support plate are all provided with mounting holes that are compatible with the multi-pipe assembly.

7. A cryogenic multi-fluid conveying device according to claim 6, characterized in that, The first support plate, the second support plate, and the third support plate are all provided with through holes adapted to the first main pipe. The inner tube of the main pipe is fixedly connected to the through hole of the first support plate by three fixed support blocks and is welded to the first main pipe. The first support plate and the third support plate are respectively fixedly connected with main pipe mounting rings adapted to the second main pipe and slide with the second main pipe. The second support plate is fixedly connected with branch pipe mounting rings for installing three branch pipes.

8. A cryogenic multi-fluid conveying device according to claim 2, characterized in that, The cold shield assembly includes a first cold shield cylinder, a second universal ball joint, a second cold shield cylinder, and a cold shield return air pipe. The first cold shield cylinder and the second cold shield cylinder are welded and fixed at both ends of the middle flange, respectively. Cold shield return air pipes are installed on both the first cold shield cylinder and the second cold shield cylinder. The third branch pipe forms a loop with the cold shield inlet pipe and the cold shield return air pipe. The cold shield return air pipe passes through the strong fixed support assembly.

9. A cryogenic multi-fluid conveying device according to claim 8, characterized in that, Both the first and second cold screen cylinders are provided with comb grooves. The comb grooves include cold screen return air pipe installation grooves and slots. The cold screen return air pipe installation grooves are adapted to the size of the cold screen return air pipes, and multiple slots are provided along their setting direction. Multiple comb grooves are connected to form an elongated notch to accommodate the installation of the cold screen return air pipes. The first and second cold screen cylinders abut against the outer pipe through a second universal ball joint set in their circumference.

Images