CN119212196B - A composite heat-insulating bellows for superconducting acceleration module and superconducting acceleration module - Google Patents
A composite heat-insulating bellows for superconducting acceleration module and superconducting acceleration module Download PDFInfo
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- CN119212196B CN119212196B CN202411104845.5A CN202411104845A CN119212196B CN 119212196 B CN119212196 B CN 119212196B CN 202411104845 A CN202411104845 A CN 202411104845A CN 119212196 B CN119212196 B CN 119212196B
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- 230000001133 acceleration Effects 0.000 title claims description 7
- 239000002131 composite material Substances 0.000 title 1
- 150000001875 compounds Chemical class 0.000 claims abstract description 67
- 238000002955 isolation Methods 0.000 claims description 8
- 238000009413 insulation Methods 0.000 abstract description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- 239000007788 liquid Substances 0.000 description 9
- 229910052757 nitrogen Inorganic materials 0.000 description 9
- 230000004323 axial length Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
- H05H7/14—Vacuum chambers
- H05H7/18—Cavities; Resonators
- H05H7/20—Cavities; Resonators with superconductive walls
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
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- Thermal Insulation (AREA)
Abstract
The invention discloses a compound heat-insulating corrugated pipe for a superconducting accelerating module and the superconducting accelerating module, which are mainly connected with a room-temperature vacuum chamber through a hot-end compound connection pipe. The main technical scheme is that the compound heat insulation corrugated pipe for the superconducting accelerating module comprises a corrugated pipe, a cold end connecting pipe, a cold end flange, a hot end compound connecting pipe and a hot end flange, wherein the cold end connecting pipe is connected with a first end of the corrugated pipe, the hot end compound connecting pipe is connected with a second end of the corrugated pipe far away from the first end, the cold end flange is connected with one end of the cold end connecting pipe far away from the corrugated pipe, and the hot end flange is connected with one end of the hot end compound connecting pipe far away from the corrugated pipe. The invention is mainly used for providing the beam pipeline in the superconducting accelerating module.
Description
Technical Field
The invention relates to the technical field of low-temperature superconduction, in particular to a compound heat-insulating corrugated pipe for a superconduction accelerating module and the superconduction accelerating module.
Background
The superconducting accelerating module is generally provided with a corrugated pipe, the corrugated pipe is a beam pipeline working in a low-temperature and vacuum environment, the corrugated pipe is connected with a core low-temperature element and a room-temperature vacuum chamber of the superconducting accelerating module, and the corrugated pipe is used for vacuum insulation and reducing the heat conduction and leakage. Specifically, on the one hand, the beam vacuum environment inside the corrugated pipe ensures that charged particles in the superconducting acceleration module can work normally, and the adiabatic vacuum outside the corrugated pipe reduces radiation heat leakage of the environment to the low-temperature element. On the other hand, the bellows can increase the effective heat transfer length, thereby reducing the heat transfer and leakage along the pipe wall.
The stability and the thermal-insulated performance of structure are difficult to compromise to current bellows, like when the ripple quantity of bellows is too much, bellows structure is unstable, can take place radial deformation to effective aperture when having reduced the beam and having passed through has increased the risk that the bellows was broken down. When the number of corrugations of the bellows is reduced, the effective heat transfer length is reduced, so that the heat conduction and leakage along the wall of the bellows is increased.
Disclosure of Invention
In view of the above, the embodiment of the invention provides a compound heat insulation corrugated pipe for a superconducting accelerating module and the superconducting accelerating module, which are mainly used for solving the problem that the corrugated pipe in the prior art is difficult to consider the stability and the heat insulation performance of the structure.
In order to achieve the above purpose, the present invention mainly provides the following technical solutions:
in one aspect, the present invention provides a compound adiabatic bellows for a superconducting accelerator module, comprising:
The corrugated pipe (100), the cold end connecting pipe (200), the cold end flange (300), the hot end compound connecting pipe (400) and the hot end flange (500);
the cold end connecting pipe (200) is connected with the first end of the corrugated pipe (100), the hot end compound connecting pipe (400) is connected with the second end, far away from the first end, of the corrugated pipe (100), the cold end flange (300) is connected with one end, far away from the corrugated pipe (100), of the cold end connecting pipe (200), and the hot end flange (500) is connected with one end, far away from the corrugated pipe (100), of the hot end compound connecting pipe (400).
The hot end compound connection pipe (400) comprises at least two sub connection pipes, the at least two sub connection pipes are sequentially sleeved towards the outer layer, adjacent sub connection pipes are arranged at intervals, and two ends of any current sub connection pipe positioned in the middle are respectively connected with the sub connection pipe positioned at the outer layer of the current sub connection pipe and the sub connection pipe positioned at the inner layer of the current sub connection pipe;
The bellows (100) is connected with the end part of the sub-connecting pipe positioned at the outermost side, and the hot end flange (500) is connected with the end part of the sub-connecting pipe positioned at the innermost side.
Wherein the end of a part of the sub-connection pipe extends into the corrugated pipe (100).
The hot end compound connection pipe (400) comprises a first sub connection pipe (410), a second sub connection pipe (420) and a third sub connection pipe (430), wherein the second sub connection pipe (420) is sleeved on the periphery of the first sub connection pipe (410), a gap is reserved between the second sub connection pipe (420) and the first sub connection pipe (410), the third sub connection pipe (430) is sleeved on the periphery of the second sub connection pipe (420), and a gap is reserved between the third sub connection pipe (430) and the second sub connection pipe (420);
Two ends of the second sub connecting pipe (420) are respectively connected with a first end of the first sub connecting pipe (410) and a first end of the third sub connecting pipe (430), a second end of the first sub connecting pipe (410) is connected with the hot end flange (500), and a second end of the third sub connecting pipe (430) is connected with the corrugated pipe (100);
The first sub-connection pipe (410) and the second sub-connection pipe (420) extend from the first end of the first sub-connection pipe (410) into the corrugated pipe (100).
The corrugated pipe (100) comprises a pipe body (110) and a hot end connector (120), wherein the hot end connector (120) is connected with the pipe body (110), and the hot end connector (120) is positioned at the second end of the corrugated pipe (100);
The minimum inner diameter of the hot end compound connection pipe (400) is the same as the inner diameter of the hot end flange (500), the hot end compound connection pipe (400) is connected with the hot end connector (120), and the maximum inner diameter of the hot end compound connection pipe (400) is the same as the inner diameter of the hot end connector (120).
Wherein the cold end connection pipe (200) and the cold end flange (300) have the same inner diameter.
The corrugated pipe (100) is a thin-wall welded corrugated pipe, and the inner diameter of the corrugated pipe (100) is larger than the inner diameter of the cold end connecting pipe (200).
Wherein, cold end flange (300) and hot end flange (500) are the loose flange.
Wherein, the double entry adiabatic bellows still includes:
The heat-isolating connecting ring (600), the heat-isolating connecting ring (600) is a thin-wall ring, the heat-isolating connecting ring (600) is connected with the second end of the corrugated pipe (100), and the heat-isolating connecting ring (600) is used for connecting a cold guide belt connected with the superconducting accelerating module.
On the other hand, the invention also provides a superconducting accelerating module, which comprises the compound heat insulation corrugated pipe of any one of the above.
According to the compound heat-insulating corrugated pipe for the superconducting accelerating module and the superconducting accelerating module, the corrugated pipe is connected with the room temperature vacuum chamber through the hot end compound connection pipe, the heat transfer distance between the corrugated pipe and the hot end flange is increased while beam vacuum in the corrugated pipe and heat-insulating vacuum outside the corrugated pipe are isolated through the structural characteristics of the hot end compound connection pipe, heat introduced into the corrugated pipe from the hot end is greatly reduced in a limited axial space, and accordingly the reduction of heat leakage can be achieved without increasing the quantity of waves of the corrugated pipe, heat insulation is achieved, and structural stability of the corrugated pipe is guaranteed. Meanwhile, due to the arrangement of the compound structure of the hot end compound connection pipe, the whole axial length of the compound heat insulation corrugated pipe is not increased or is increased by a small amount, and the excessive occupation of the axial space of the compound heat insulation corrugated pipe is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a duplex adiabatic bellows for a superconducting accelerator module according to an embodiment of the present invention.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following detailed description refers to the specific implementation, structure, characteristics and effects of a compound heat insulation corrugated pipe for a superconducting accelerator module according to the invention with reference to the accompanying drawings and preferred embodiments.
In one aspect, as shown in fig. 1, an embodiment of the present invention provides a duplex adiabatic bellows for a superconducting accelerator module, including:
The corrugated pipe (100), the cold end connecting pipe (200), the cold end flange (300), the hot end compound connecting pipe (400) and the hot end flange (500);
the cold end connecting pipe (200) is connected with the first end of the corrugated pipe (100), the hot end compound connecting pipe (400) is connected with the second end, far away from the first end, of the corrugated pipe (100), the cold end flange (300) is connected with one end, far away from the corrugated pipe (100), of the cold end connecting pipe (200), and the hot end flange (500) is connected with one end, far away from the corrugated pipe (100), of the hot end compound connecting pipe (400).
In fig. 1, the area a located above the broken line is a cross-sectional structure of the double insulated bellows, and the area B located below the broken line is a front view structure of the double insulated bellows as viewed from outside.
The corrugated pipe (100) further comprises a pipe body (110), a hot end connector (120) and a cold end connector (130), wherein the pipe body (110) is of an approximately cylindrical structure, and the pipe body (110) is a pipe with an approximately wavy shape. The hot end connector (120) and the cold end connector (130) are respectively positioned at two axial ends of the pipe body (110) and can be fixedly connected with the pipe body (110) in a welding mode. The hot end fitting (120) and the cold end fitting (130) are each annular disc-like structures having a central opening. The tube body (110) is a thin-walled tube body, the thin-walled structure can reduce the heat transfer area along the tube wall of the corrugated tube (100), and the corrugated structure of the tube body (110) can increase the heat transfer length along the tube wall. During the heat conduction process, the heat is proportional to the heat transfer area and inversely proportional to the heat transfer length, so the design of the corrugated pipe (100) with the thin wall welding can simultaneously reduce the heat conduction from the aspects of reducing the heat transfer area and prolonging the heat transfer length. In addition, the corrugated pipe (100) has scalability through the self structure, and can also compensate the axial deformation caused by low-temperature cold shrinkage.
The cold end connecting pipe (200) is connected with the cold end joint (130) and can be welded or integrally formed. The cold end connection (200) may be a cylindrical tube. In some embodiments, the axial length of the cold end connection tube (200) is smaller than the axial length of the tube body (110), so that the cold end connection tube (200) is prevented from excessively occupying the axial space, and the heat transfer length is increased as much as possible in the limited axial space.
The hot end duplex connection pipe (400) is connected with the hot end connector (120) and can be welded or integrally formed. The hot side duplex connection pipe (400) can be a duplex structure with various specific forms, such as a structure that a plurality of cylindrical structures are nested or have nested relation, and the purpose is to increase the heat transfer distance between the hot side flange (500) and the hot side joint (120) and reduce heat transfer. Hereinafter, the distance will be described in detail.
The cold end flange (300) is connected with a superconducting cavity or a superconducting solenoid in the superconducting accelerating module, and the temperature is 2K or 4K. The hot end flange (500) is connected to the room temperature end, i.e., the room temperature vacuum chamber, at a temperature of about 300K. The whole compound heat-insulating corrugated pipe is of a transition structure from low temperature to room temperature, and heat conduction and heat leakage are one of main heat loads of the superconducting accelerating module. Through the arrangement of the structure, the heat leakage is greatly reduced, and the working performance of the superconducting accelerating module is ensured.
According to the compound heat-insulating corrugated pipe for the superconducting accelerating module and the superconducting accelerating module, the corrugated pipe is connected with the room-temperature vacuum chamber through the hot-end compound connection pipe, the heat transfer distance between the corrugated pipe and the hot-end flange is increased while beam vacuum in the corrugated pipe and heat-insulating vacuum outside the corrugated pipe are isolated through the structural characteristics of the hot-end compound connection pipe, heat introduced into the corrugated pipe from the hot end is greatly reduced in a limited axial space, and accordingly reduction of heat leakage can be achieved without increasing the quantity of waves of the corrugated pipe, heat insulation is achieved, and structural stability of the corrugated pipe is guaranteed. Meanwhile, due to the arrangement of the compound structure of the hot end compound connection pipe, the whole axial length of the compound heat insulation corrugated pipe is not increased or is increased by a small amount, and the excessive occupation of the axial space of the compound heat insulation corrugated pipe is avoided.
In one embodiment, the hot-end duplex connection pipe (400) comprises at least two sub connection pipes, the at least two sub connection pipes are sequentially sleeved towards the outer layer, adjacent sub connection pipes are arranged at intervals, and two ends of any current sub connection pipe positioned in the middle are respectively connected with the sub connection pipe positioned on the outer layer of the current sub connection pipe and the sub connection pipe positioned on the inner layer of the current sub connection pipe. The bellows (100) is connected with the end part of the sub-connecting pipe positioned at the outermost side, and the hot end flange (500) is connected with the end part of the sub-connecting pipe positioned at the innermost side.
The sub-connecting pipes are of cylindrical structures, and the inner diameters of at least two sub-connecting pipes are different, so that the at least two sub-connecting pipes can be sequentially sleeved towards the outer layer, and the spacing distances of adjacent sub-connecting pipes in the radial direction of the sub-connecting pipes can be consistent. Any one of the sub-connecting pipes positioned in the middle is used as a current sub-connecting pipe, one end of the current sub-connecting pipe is connected with one sub-connecting pipe sleeved outside the current sub-connecting pipe, the other end of the current sub-connecting pipe is connected with one sub-connecting pipe penetrating through the inside of the current sub-connecting pipe, and then at least two sub-connecting pipes are connected to form a compound connecting pipe formed by bending the outer circle to the inner circle in a wave mode. This arrangement reduces the occupation of the axial space while increasing the heat conduction distance. The bellows (100) is connected with the end of the sub-connection pipe positioned at the outermost side, and the hot end connector (120) can be connected with the end of the sub-connection pipe positioned at the outermost side.
In one embodiment, the ends of the partial sub-connection pipes extend into the bellows (100), for example, in addition to the sub-connection pipes connected to the hot-end connection (120), the other sub-connection pipes may extend into the pipe body (110) through a central opening of the hot-end connection (120) in a partial region of one end of the pipe body (110). Because the hot end compound connection pipe (400) is arranged towards the structure of the inner layer in a telescopic manner, the inner diameter of the corrugated pipe (100) or the pipe body (110) is enlarged on the premise that the structure of the hot end flange (500) is not changed, namely, the pipe body (110) and the hot end compound connection pipe (400) are provided with a lamination area in the radial direction, so that the corrugated pipe (100) is far away from an accelerated particle beam, and meanwhile, the corrugated pipe (100) and the beam are isolated by the hot end compound connection pipe (400) serving as an inner lining, the corrugated pipe (100) is protected, the risk of breakdown of the corrugated pipe (100) is reduced, and the corrugated pipe is doubly protected.
In a more specific embodiment, as shown in fig. 1, the hot-end duplex connection pipe (400) includes a first sub-connection pipe (410), a second sub-connection pipe (420) and a third sub-connection pipe (430), the second sub-connection pipe (420) is sleeved on the periphery of the first sub-connection pipe (410), a gap is reserved between the second sub-connection pipe (420) and the first sub-connection pipe (410), the third sub-connection pipe (430) is sleeved on the periphery of the second sub-connection pipe (420), and a gap is reserved between the third sub-connection pipe (430) and the second sub-connection pipe (420). Two ends of the second sub connecting pipe (420) are respectively connected with a first end of the first sub connecting pipe (410) and a first end of the third sub connecting pipe (430), a second end of the first sub connecting pipe (410) is connected with the hot end flange (500), and a second end of the third sub connecting pipe (430) is connected with the corrugated pipe (100).
Namely, the second sub-takeover (420) is the current sub-takeover positioned in the middle position, the first sub-takeover (410) is the innermost sub-takeover, and the third sub-takeover (430) is the outermost sub-takeover. The radial spacing between the first sub-nozzle (410) and the second sub-nozzle (420) and the third sub-nozzle (430) may be the same. The first sub-connecting pipe (410), the second sub-connecting pipe (420) and the third sub-connecting pipe (430) can be welded in sequence or integrally formed, but certain air tightness of the connection among the first sub-connecting pipe (410), the second sub-connecting pipe (420) and the third sub-connecting pipe (430) is ensured. The first sub-connection pipe (410) and the second sub-connection pipe (420) extend from the first end of the first sub-connection pipe (410) into the corrugated pipe (100). Specifically, the axial length of the second sub-connecting pipe (420) is greater than that of the third sub-connecting pipe (430), the second end of the second sub-connecting pipe (420) is connected with the first end of the third sub-connecting pipe (430), the first end of the second sub-connecting pipe (420) extends into the pipe body (110) from the central opening of the hot end joint (120), the first end of the first sub-connecting pipe (410) is connected with the first end of the second sub-connecting pipe (420) in the pipe body (110), the axial length of the first sub-connecting pipe (410) can be greater than that of the second sub-connecting pipe (420), and then the second end of the first sub-connecting pipe (410) extends out of the second sub-connecting pipe (420) and is connected with the hot end flange (500). The advantages are not described in detail.
In one embodiment, the bellows (100) includes a tube (110) and a hot end fitting (120), the hot end fitting (120) being connected to the tube (110), the hot end fitting (120) being located at a second end of the bellows (100). The minimum inner diameter of the hot end compound connection pipe (400) is the same as the inner diameter of the hot end flange (500), the hot end compound connection pipe (400) is connected with the hot end connector (120), and the maximum inner diameter of the hot end compound connection pipe (400) is the same as the inner diameter of the hot end connector (120).
The hot end duplex connection pipe (400) achieves the effect of increasing the inner diameter of the pipe body (110) without changing the inner diameter of the hot end flange (500). The minimum inner diameter of the hot end duplex connection pipe (400) is the same as the inner diameter of the hot end flange (500), so that the beam advancing channel is not affected.
In one embodiment, the cold end connection (200) has the same inside diameter as the cold end flange (300). Not only ensuring that the beam advancing channel is not affected, but also reserving the installation space of the bolt at the outer side of the cold end connecting pipe (200).
In one embodiment, the inner diameter of the bellows (100) or tube (110) is larger than the inner diameter of the cold-end connection tube (200), thereby realizing that the tube (110) is far away from the accelerated particle beam, and reducing the risk of the bellows (100) or tube (110) being broken down. It will be appreciated that the inner diameter of the cold end connection tube (200) is consistent with the inner diameter of the central opening of the cold end fitting (130) which in turn leaves the beam advance passage unaffected.
In one embodiment, both the cold end flange (300) and the hot end flange (500) are looper flanges, or metal seal looper flanges. The cold end flange (300) further comprises a cold end flanging (310) and a cold end flange main body (320), the cold end flanging (310) is connected with the cold end connecting pipe (200) and extends to the outer side of the cold end connecting pipe (200), the cold end flange main body (320) is sleeved on the periphery of the cold end connecting pipe (200), the cold end flanging (310) is fixed through internal step extrusion, and then connection with a superconducting cavity or a superconducting solenoid in a superconducting acceleration module is achieved. Likewise, the hot end flange (500) further comprises a hot end flanging (510) and a hot end flange main body (520), wherein the hot end flanging (510) is connected with the hot end duplex connection pipe (400) and extends to the outer side of the hot end duplex connection pipe (400), the hot end flange main body (520) is sleeved on the periphery of the hot end duplex connection pipe (400) or the innermost sub-connection pipe of the hot end duplex connection pipe (400), and the hot end flanging (510) is fixed through extrusion of an inner step, so that the connection with the room temperature vacuum chamber is realized. The size and the specification of the flange are not limited, the metal sealing looper flange can ensure that the beam in the double heat insulation corrugated pipe can run in a high vacuum environment, and the design of the looper flange can ensure the reliability and convenience of field installation.
In one embodiment, the compound heat-insulating corrugated pipe further comprises a heat-isolating connecting ring (600), wherein the heat-isolating connecting ring (600) is a thin-wall ring, the heat-isolating connecting ring (600) is connected with the second end of the corrugated pipe (100), and the heat-isolating connecting ring (600) is used for connecting a cold guide belt connected with the superconducting accelerating module.
The heat-isolating connecting ring (600) is positioned between the corrugated pipe (100) and the hot-end compound connection pipe (400), for example, the heat-isolating connecting ring (600) is arranged around the outer wall of the hot-end connector (120) for one circle, and can be welded with the hot-end connector (120). 4-8 bolt connecting holes are arranged on the heat isolation connecting ring (600) and are used for connecting the cold guide belt, so that the heat isolation connecting ring has a heat-blocking effect, and the cold quantity led from the hot end to the cold end is reduced. The heat-isolating connecting ring (600) can be made of a material with good heat-conducting property, such as copper.
The cold guide belt can be a liquid nitrogen cold screen. In one embodiment, the superconducting acceleration module comprises a vacuum cylinder, the vacuum cylinder can be made of stainless steel, the vacuum cylinder comprises an inner cavity, a liquid nitrogen cold screen can be arranged on the inner side of the vacuum cylinder, the cold screen is generally a copper screen or an aluminum screen, a cold screen pipe filled with liquid nitrogen is arranged on the cold screen pipe in a coiled mode, the liquid nitrogen cold screen circulates through the liquid nitrogen to cool the inner cavity, and then a low-temperature environment in the inner cavity is maintained. The thermal isolation connecting ring (600) can be connected with a liquid nitrogen cold screen in the superconducting acceleration module to realize cooling, and the temperature is about 80K. The cold end flange (300) is connected with a superconducting cavity or a superconducting solenoid in the superconducting accelerating module, and the temperature is 2K or 4K. The hot end flange (500) is connected to the room temperature end, i.e., the room temperature vacuum chamber, at a temperature of about 300K. The heat isolation connecting ring (600) can conduct 300K-80K heat to the 80K liquid nitrogen cold screen. The effective heat transfer length of the corrugated pipe (100) is longer than that of the hot end duplex connection pipe (400), and the corrugated pipe (100) is arranged in a temperature zone below 80K, so that heat leakage of 2K or 4K at the cold end flange (300) is reduced, and the refrigerating efficiency of the system is improved.
The heat blocking connection ring (600) plays a role of heat blocking, optimizes the temperature gradient along the axial direction of the corrugated pipe (100), and further reduces the heat leakage introduced from the room temperature to the low-temperature element through the cold end flange (300).
On the other hand, the invention also provides a superconducting accelerating module, which comprises the compound heat insulation corrugated pipe of any one of the above.
The cold end flange (300) of the compound heat-insulating corrugated pipe is connected with a superconducting cavity or a superconducting solenoid in the superconducting accelerating module, and the hot end flange (500) is connected with a room temperature end, namely a room temperature vacuum chamber. The superconducting accelerating module comprises the compound heat-insulating corrugated pipe of any one of the previous steps, and the compound heat-insulating corrugated pipe comprises any one of the previous steps, and the advantages of the compound heat-insulating corrugated pipe are not repeated here.
In the embodiment where the superconducting accelerating module comprises the liquid nitrogen cold shield and the compound heat insulation corrugated pipe comprises the heat-blocking connecting ring (600), the heat-blocking connecting ring (600) is connected with the liquid nitrogen cold shield.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A compound adiabatic bellows for a superconducting accelerator module, comprising:
The corrugated pipe (100), the cold end connecting pipe (200), the cold end flange (300), the hot end compound connecting pipe (400) and the hot end flange (500);
The cold end connecting pipe (200) is connected with a first end of the corrugated pipe (100), the hot end compound connecting pipe (400) is connected with a second end of the corrugated pipe (100) away from the first end, the cold end flange (300) is connected with one end of the cold end connecting pipe (200) away from the corrugated pipe (100), and the hot end flange (500) is connected with one end of the hot end compound connecting pipe (400) away from the corrugated pipe (100);
the hot end compound connection pipe (400) comprises at least two sub connection pipes, at least two sub connection pipes are sleeved towards the outer layer in sequence, adjacent sub connection pipes are arranged at intervals, and two ends of any current sub connection pipe positioned in the middle are respectively connected with the sub connection pipe positioned at the outer layer of the current sub connection pipe and the sub connection pipe positioned at the inner layer of the current sub connection pipe;
The corrugated pipe (100) is connected with the end part of the sub-connecting pipe positioned at the outermost side, and the hot end flange (500) is connected with the end part of the sub-connecting pipe positioned at the innermost side;
part of the end of the sub-connection pipe extends into the corrugated pipe (100).
2. The compound adiabatic bellows for a superconducting accelerator module according to claim 1, wherein,
The hot end duplex connection pipe (400) comprises a first sub connection pipe (410), a second sub connection pipe (420) and a third sub connection pipe (430), wherein the second sub connection pipe (420) is sleeved on the periphery of the first sub connection pipe (410), a gap is reserved between the second sub connection pipe (420) and the first sub connection pipe (410), the third sub connection pipe (430) is sleeved on the periphery of the second sub connection pipe (420), and a gap is reserved between the third sub connection pipe (430) and the second sub connection pipe (420);
two ends of the second sub-connecting pipe (420) are respectively connected with a first end of the first sub-connecting pipe (410) and a first end of the third sub-connecting pipe (430), a second end of the first sub-connecting pipe (410) is connected with the hot end flange (500), and a second end of the third sub-connecting pipe (430) is connected with the corrugated pipe (100);
the first sub-connection pipe (410) and the second sub-connection pipe (420) extend from a first end of the first sub-connection pipe (410) into the bellows (100).
3. The compound adiabatic bellows for a superconducting accelerator module according to claim 1, wherein,
The corrugated pipe (100) comprises a pipe body (110) and a hot end connector (120), the hot end connector (120) is connected with the pipe body (110), and the hot end connector (120) is positioned at the second end of the corrugated pipe (100);
The minimum inner diameter of the hot end compound connection pipe (400) is the same as the inner diameter of the hot end flange (500), the hot end compound connection pipe (400) is connected with the hot end connector (120), and the maximum inner diameter of the hot end compound connection pipe (400) is the same as the inner diameter of the hot end connector (120).
4. The compound adiabatic bellows for a superconducting accelerator module according to claim 1, wherein,
The cold end connection pipe (200) is the same as the inner diameter of the cold end flange (300).
5. The compound adiabatic bellows for a superconducting accelerator module according to claim 1, wherein,
The corrugated pipe (100) is a thin-wall welded corrugated pipe, and the inner diameter of the corrugated pipe (100) is larger than the inner diameter of the cold end connecting pipe (200).
6. The compound adiabatic bellows for a superconducting accelerator module according to claim 1, wherein,
The cold end flange (300) and the hot end flange (500) are loose flanges.
7. The multiple thermally insulated bellows for a superconducting accelerating module of claim 1, further comprising:
The heat-isolation connecting ring (600), the heat-isolation connecting ring (600) is a thin-wall ring, the heat-isolation connecting ring (600) is connected with the second end of the corrugated pipe (100), and the heat-isolation connecting ring (600) is used for connecting a cold conduction belt of the superconducting acceleration module.
8. A superconducting accelerating module comprising a compound adiabatic bellows as claimed in any one of the preceding claims 1-7.
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