CN215100687U - Supporting rod structure for superconducting magnet in low-temperature environment and superconducting magnet - Google Patents

Abstract

The utility model provides a support rod structure of a superconducting magnet and the superconducting magnet used in the low temperature environment, the structure comprises a supporting rod base, a first supporting rod and a supporting rod sleeve assembly, wherein the supporting rod base is fixedly arranged on an inner Dewar of the superconducting magnet, the first supporting rod comprises a first connecting end connected with the first connecting end, a supporting body section and a second connecting end, the first connecting end is fixedly connected with the supporting rod base, the supporting body section and the second connecting end penetrate through the outer Dewar to be arranged outside the outer Dewar, the supporting rod sleeve assembly is provided with a center accommodating cavity, the first supporting rod is arranged in the center accommodating cavity and is fixedly connected with the supporting rod sleeve assembly through the second connecting end, the first supporting rod and the supporting rod sleeve assembly are coaxially arranged, and a gap is formed between the inner wall of the first supporting rod and the inner wall of the supporting rod sleeve assembly. Use the technical scheme of the utility model to solve among the prior art superconducting magnet structure complicated, leak heat big and the poor technical problem of reliability.

Description

Supporting rod structure for superconducting magnet in low-temperature environment and superconducting magnet

Technical Field

The utility model relates to a superconductive application technical field especially relates to a bracing piece structure and superconductive magnet that is used for superconductive magnet under low temperature environment.

Background

A superconductor is a material that loses electrical resistance at a critical temperature, a phenomenon also referred to as superconductivity. When a superconductor material is used, if one or more superconducting wires are used as an excitation coil to form a device for generating a magnetic field, the conventional superconductor material is easily affected by the magnetic field to lose superconductivity, so that the superconductivity and the magnetism are not considered at the same time. This problem cannot be solved until scientists find the superconductivity of niobium zirconium, niobium titanium and other alloy materials and niobium tri-tin compound materials. A superconducting magnet is also such a superconductor that retains magnetism.

The superconducting magnet can run under the condition of direct current without energy loss, and can generate a huge magnetic field through current with very high intensity. In addition, the magnetic field has stable magnetism and high uniformity of the magnetic field distributed in space, can obtain the magnetic field with required shape, has small volume and light weight, and is more and more widely applied. It has important practical function and great application prospect in the fields of electricians, transportation, medical treatment, military affairs and science, and some of them have already gained practical benefit, such as Japanese maglev train pear mountain line.

The critical temperature, the critical magnetic field, and the critical current are three important parameters of a superconductor. When any parameter of the temperature, the magnetic field and the current exceeds a critical value, the superconducting magnet can generate phase change and become a constant conductor. Therefore, the superconducting magnet requires an extremely low temperature use environment and mechanical properties of the superconducting wire itself, and thus has special requirements on structural strength and heat leakage properties, thereby avoiding the occurrence of the quench phenomenon.

For example, chinese utility model patent application No. 20081010055.7 discloses a "conduction-cooled superconducting magnet dewar structure convenient for assembly and disassembly". Including the dewar bottle, its characterized in that: the Dewar type superconducting magnet core comprises a Dewar cylinder body, a superconducting magnet, a refrigerator, a superconducting magnet, a measuring device and a measuring device, wherein the Dewar cylinder body is a hollow annular cylinder body, a room temperature hole is formed in the middle of the annular cylinder body, an annular copper cold screen is installed in the Dewar cylinder body, the refrigerator and the superconducting magnet are installed in the copper cold screen, a vacuum pumping port is formed in the Dewar cylinder body, the measuring device is installed on an upper cover of the Dewar cylinder body, and the Dewar cylinder body is in a vacuum state. This utility model is simpler than traditional dewar container, and the conduction is leaked heat for a short time, has the advantage of being convenient for installation and dismantlement moreover. However, the superconducting magnet in the conduction cooling superconducting magnet dewar is a static magnet, and the weight, reliability and structural mechanics of the superconducting magnet are difficult to meet the requirements of a dynamic superconducting magnet on a maglev train. Meanwhile, the liquid cooling medium in the cooling system is easy to volatilize and overflow, so that loss is caused, and the liquid cooling medium needs to be supplemented regularly without adopting a self-circulation mode, so that the operation difficulty and the operation cost are increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a bracing piece structure and superconducting magnet that is used for superconducting magnet under low temperature environment can solve among the prior art superconducting magnet structure complicacy, leak heat and reach the poor technical problem of reliability greatly.

According to the utility model discloses an aspect provides a bracing piece structure that is used for superconducting magnet under low temperature environment, and bracing piece structure includes: the supporting rod base is fixedly arranged on an inner Dewar of the superconducting magnet; the first supporting rod comprises a first connecting end, a supporting body section and a second connecting end which are connected, the first connecting end penetrates through an outer Dewar of the superconducting magnet to be fixedly connected with the supporting rod base, and the supporting body section and the second connecting end penetrate through the outer Dewar to be arranged outside the outer Dewar; the supporting rod sleeve component is arranged outside the outer Dewar and is provided with a center accommodating cavity, the first supporting rod is arranged at the center accommodating cavity and fixedly connected with the supporting rod sleeve component through a second connecting end, the first supporting rod is coaxially arranged with the supporting rod sleeve component, and a gap is formed between the inner wall of the first supporting rod and the inner wall of the supporting rod sleeve component.

Furthermore, the first support rod is provided with a first fine thread section and a second fine thread section, the first fine thread section is arranged at the first end of the first support rod to form a first connection end, the second fine thread section is arranged at the second end of the first support rod to form a second connection end, and the thread screwing directions of the first fine thread section and the second fine thread section are opposite.

Furthermore, the supporting rod sleeve assembly comprises a supporting rod sleeve and a plug, the second connecting end is fixedly connected with the supporting rod sleeve assembly, and the plug is fixedly arranged on the supporting rod sleeve.

According to the utility model discloses an on the other hand provides a superconducting magnet for under low temperature environment, superconducting magnet includes interior dewar, outer dewar and bracing piece structure, and bracing piece structure is used for supporting interior dewar and outer dewar, and bracing piece structure is as above bracing piece structure.

Furthermore, the superconducting magnet also comprises a second supporting rod, the second supporting rod is arranged between the outer Dewar and the inner Dewar and is respectively connected with the outer Dewar and the inner Dewar, and the second supporting rod is used for supporting the outer Dewar.

Furthermore, the superconducting magnet further comprises a cold screen and a cooling liquid pipeline, the cooling liquid pipeline is connected with the inner Dewar, the cooling liquid pipeline is used for sending a liquid cooling medium into the inner Dewar, the cold screen is arranged between the inner Dewar and the outer Dewar and is in lap joint with the cooling liquid pipeline, and the cold screen is used for reducing the heat radiation of the outer Dewar and shielding the interference of an external high-frequency magnetic field on the superconducting coil.

Furthermore, the superconducting magnet also comprises a coil framework and a superconducting coil, wherein the coil framework is fixedly arranged in the inner Dewar, and the superconducting coil is arranged on the coil framework.

Further, the inner dewar and the outer dewar are made of titanium alloy.

Use the technical scheme of the utility model, a bracing piece structure for superconducting magnet under low temperature environment is provided, this bracing piece structure is the overhanging structure of a relative outer dewar, pass outer dewar setting in the outside of outer dewar through supporting body section and second link, when carrying out heat transfer, it loops through outer dewar, bracing piece sleeve subassembly, first bracing piece, bracing piece base to interior dewar, the overhanging length of first bracing piece is fully utilized to this kind of mode, the heat transfer distance between the inside and outside dewar has greatly been prolonged, heat leakage has been reduced effectively; the excited superconducting coil can generate a strong magnetic field, the direct current motor and the propulsion coil form a direct current motor, the direct current motor sequentially passes through the superconducting coil and a coil framework, the inner Dewar, the supporting rod base, the first supporting rod and the supporting rod sleeve assembly to the outer Dewar, under the mode, electromagnetic force generated by the superconducting coil is transmitted to the first supporting rod through a force transmission path and then transmitted to the supporting rod sleeve assembly through the first supporting rod, the supporting rod sleeve assembly is connected with an external carrier, force is transmitted to a moving carrier, and rigidity and stability of the whole superconducting magnet are maintained. Therefore, the utility model provides a bracing piece structure for superconducting magnet under low temperature environment compares with prior art, passes power simple structure, simple to operate between each spare part, and overhanging type's bracing piece structure provides sufficient long heat transfer path, reduces to a certain extent and leaks heat, has reduced liquid refrigerant's loss, has improved the reliability.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural diagram illustrating a support rod structure for superconducting magnets in a low-temperature environment according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a support rod base; 20. a first support bar; 21. a first connection end; 22. supporting a body section; 23. a second connection end; 30. a strut sleeve assembly; 31. a support rod sleeve; 32. a plug; 100. an inner dewar; 200. an outer dewar; 300. a support rod structure; 400. a second support bar; 500. cooling the screen; 600. a coolant line; 700. superconducting coils and coil bobbins; 800. and (4) a nut.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1, according to an embodiment of the present invention, there is provided a support rod structure for a superconducting magnet in a low temperature environment, the support rod structure includes a support rod base 10, a first support rod 20 and a support rod sleeve assembly 30, the support rod base 10 is fixedly disposed on an inner dewar of the superconducting magnet, the first support rod 20 includes a first connecting end 21, a support body section 22 and a second connecting end 23 which are connected to each other, the first connecting end 21 passes through an outer dewar of the superconducting magnet and is fixedly connected to the support rod base 10, the support body section 22 and the second connecting end 23 pass through the outer dewar and are disposed outside the outer dewar, the support rod sleeve assembly 30 is disposed outside the outer dewar, the support rod sleeve assembly 30 has a central accommodating cavity, the first support rod 20 is disposed in the central accommodating cavity and is fixedly connected to the support rod sleeve assembly 30 through the second connecting end 23, the first support rod 20 is disposed coaxially with the support rod sleeve assembly 30, there is a gap between the first support rod 20 and the inner wall of the support rod sleeve assembly 30.

By applying the configuration mode, the supporting rod structure for the superconducting magnet in the low-temperature environment is provided, the supporting rod structure is a structure extending outwards relative to the outer Dewar, the supporting body section and the second connecting end penetrate through the outer Dewar to be arranged outside the outer Dewar, and when heat is transferred, the supporting rod structure sequentially passes through the outer Dewar, the supporting rod sleeve assembly, the first supporting rod and the supporting rod base to reach the inner Dewar; the excited superconducting coil can generate a strong magnetic field, the direct current motor and the propulsion coil form a direct current motor, the direct current motor sequentially passes through the superconducting coil and a coil framework, the inner Dewar, the supporting rod base, the first supporting rod and the supporting rod sleeve assembly to the outer Dewar, under the mode, electromagnetic force generated by the superconducting coil is transmitted to the first supporting rod through a force transmission path and then transmitted to the supporting rod sleeve assembly through the first supporting rod, the supporting rod sleeve assembly is connected with an external carrier, force is transmitted to a moving carrier, and rigidity and stability of the whole superconducting magnet are maintained. Therefore, the utility model provides a bracing piece structure for superconducting magnet under low temperature environment compares with prior art, passes power simple structure, simple to operate between each spare part, and overhanging type's bracing piece structure provides sufficient long heat transfer path, reduces to a certain extent and leaks heat, has reduced liquid refrigerant's loss, has improved the reliability.

Further, the utility model discloses in, in order to improve the installation reliability of bracing piece structure, first bracing piece 20 has the fine tooth screw thread section of first fine tooth and the fine tooth screw thread section of second, and the first end that the fine tooth screw thread section of first bracing piece 20 set up forms first link 21, and the fine tooth screw thread section of second sets up at the second end of first bracing piece 20 and forms second link 23, and the screw thread of the fine tooth screw thread section of first fine tooth and second is revolved to opposite direction.

Furthermore, in the utility model discloses in, in order to simplify manufacturing process, reduce cost, can configure into the support rod sleeve subassembly 30 to including support rod sleeve 31 and end cap 32, second link 23 and support rod sleeve subassembly 30 fixed connection, end cap 32 is fixed to be set up on support rod sleeve 31.

According to another aspect of the present invention, there is provided a superconducting magnet for use in a low temperature environment, the superconducting magnet comprising an inner dewar 100, an outer dewar 200 and a support rod structure 300, the support rod structure 300 being used for supporting the inner dewar 100 and the outer dewar 200, the support rod structure 300 being the support rod structure 300 as described above.

Use this kind of configuration, provide a superconducting magnet for under the low temperature environment, this superconducting magnet uses the utility model provides a bracing piece structure carries out the support of interior dewar and outer dewar, because the utility model provides a bracing piece structure passes force simple structure, simple to operate between each spare part, and overhanging bracing piece structure provides sufficient long heat transfer path, reduces the heat leakage, has reduced the loss of liquid refrigeration medium to a certain extent, has improved the reliability, consequently uses it to the superconducting magnet in, can effectively improve the working property of superconducting magnet.

Further, in the present invention, in order to realize reliable support of the outer dewar, the superconducting magnet may be configured to further include a second support rod 400, the second support rod 400 is disposed between the outer dewar 200 and the inner dewar 100 and is respectively connected with the outer dewar 200 and the inner dewar 100, and the second support rod 400 is used for supporting the outer dewar 200.

Furthermore, in the utility model discloses in, in order to guarantee the low temperature environment of superconducting magnet, can configure the superconducting magnet to still include cold shield 500 and coolant liquid pipeline 600, coolant liquid pipeline 600 is connected with interior dewar 100, in coolant liquid pipeline 600 is used for sending into interior dewar 100 with liquid cooling medium, including the cold shield 500 sets up between dewar 100 and outer dewar 200 and with coolant liquid pipeline 600 overlap joint setting, cold shield 500 is used for reducing outer dewar 200's thermal radiation and shielding external high frequency magnetic field to superconducting coil's interference.

Further, in the utility model discloses in, superconducting magnet still includes coil skeleton and superconducting coil, and the coil skeleton is fixed to be set up including in dewar 100, and superconducting coil sets up on the coil skeleton. In the present invention, considering the structural strength, the materials of the inner dewar 100 and the outer dewar 200 may be all configured to include titanium alloy.

In order to further understand the present invention, the following description is made in detail with reference to fig. 1 for the supporting rod structure of the superconducting magnet and the superconducting magnet provided by the present invention in a low temperature environment.

As shown in fig. 1, according to the embodiment of the present invention, a superconducting magnet for use in a low temperature environment is provided, the superconducting magnet includes an inner dewar 100, an outer dewar 200, a supporting rod structure 300, a second supporting rod 400, a cold shield 500, a cooling liquid pipeline 600, a superconducting coil and coil skeleton 700, and a nut 800, the supporting rod structure 300 includes a supporting rod base 10, a first supporting rod 20, and a supporting rod sleeve assembly 30, and the supporting rod sleeve assembly 30 includes a supporting rod sleeve 31 and a plug 32.

The superconducting coil is wound in a runway type superconducting coil framework and is installed in the inner Dewar 100, the nut 800 is welded on the inner Dewar backboard, the coil framework is matched with the nut 800 on the inner Dewar backboard through 4 titanium alloy screws with 10 positions in total, namely M8, on the outer ring and 6 screws with 6 positions in the inner ring so as to be fixedly arranged in the inner Dewar 100, and the sufficient rigidity of the coil framework is ensured.

The liquid cooling medium is supplied from the outside to the inner dewar 100 through the cooling liquid pipe 600 so that the superconducting coils are maintained in a temperature environment of 4K. The cold shield 500 is overlapped with the cooling liquid pipeline 600, and is maintained in a temperature environment of 28K through the heat transfer of the liquid cooling medium in the pipeline, so as to block the heat leakage of the inner Dewar.

A vacuum layer is arranged between the inner dewar and the outer dewar. The inner dewar 100 is provided with a hole for avoiding, the second support rod 400 penetrates through the hole for avoiding, and one end of the second support rod is welded on a sealing plate of the outer dewar for supporting the outer dewar 200 in a vacuum environment. The inner dewar 100 of titanium alloy structure is placed in the outer dewar 200 of titanium alloy structure. A cold shield 500 of aluminum construction is lapped over the coolant line 600. The wound superconducting coil and the titanium alloy framework are in threaded connection with the inner Dewar through a titanium alloy screw, and a titanium alloy screw cap is welded on the inner Dewar. The second support rod 400 of titanium alloy structure passes through the yielding holes of the inner dewar and the cold shield, one end of which is welded with the outer dewar, and is used for supporting the outer dewar 200 in a contraction state in a vacuum state. Outer dewar 200 is a room temperature environment 300K with an inner dewar disposed therein for containing a coolant medium. The superconducting coil and the framework are all soaked in a liquid cooling medium with the temperature of 4K. The space between the outer Dewar and the inner Dewar is in vacuum state, two cold shields arranged between the outer Dewar and the inner Dewar are lapped with the cooling pipeline, and the liquid cooling medium circulating in the cold shields is maintained at the temperature of 28K.

The first supporting rod 20 is arranged at the center of the superconducting magnet, the first supporting rod 20 is a central supporting rod, the central supporting rod is a titanium alloy screw rod, the interior of the central supporting rod is hollow, and two fine threads with opposite screwing directions are arranged at two ends of the central supporting rod. The bracing piece sleeve 31 welds with outer dewar 200, guarantees with outside delivery device's connection precision, should guarantee the straightness that hangs down of bracing piece sleeve 31 inboard and outer dewar simultaneously for the clearance distance between the inner wall of the support body section 22 of central support pole and bracing piece sleeve 31 all keeps unanimous, avoids the emergence of thermal short circuit. One side of the central support rod is in threaded connection with the support rod base 10 on the inner Dewar, and the other side of the central support rod is in threaded connection with the support rod sleeve 31. The fine thread at the two ends provides enough screwing-in number, when the thread at one side is loosened, the thread at the other side can provide reverse supporting force, so that the central supporting rod is ensured not to be loosened integrally, and the reliability is high. The opposite screw threads can ensure simple installation, during installation, the central support rod is firstly screwed into the support rod sleeve 31 and extends out for a certain length, the integrally-assembled inner Dewar is arranged in the outer Dewar, the part of the central support rod extending out of the support rod sleeve 31 is reversely screwed into the support rod base 10 of the inner Dewar 100, and finally the plug 32 is sealed.

In this embodiment, two opposite threads are disposed at two ends of the hollow central support rod, a right-handed thread having a 50mm connection end with the support rod base 10 and a left-handed thread having a 100mm connection end with the support rod sleeve 31. When the installation is carried out, the supporting rod sleeve 31 and the supporting rod base 10 are respectively welded on the outer dewar 200 and the inner dewar 100. The central support rod is then screwed into the support rod sleeve 31 in a left-hand direction from the inside of the outer dewar 200 and extends out by a length of about 50 mm. The self-contained inner dewar 100 is then placed into the outer dewar 200 and the central rod is screwed into the rod base 10 in a right-handed direction, such that the central rod is completely inserted into the rod sleeve 31. And finally, installing the plug 32 at the central support rod and welding the plug with the support rod sleeve 31 to finish the integral assembly of the superconducting magnet.

The heat transfer path from outer dewar 200 to inner dewar 100 is: outer Dewar 200-support rod sleeve 31-central support rod-support rod base 10-inner Dewar 100.

The force transmission path is as follows: superconducting coil and coil former 700-inner dewar 100-support rod base 10-central support rod-support rod sleeve 31-outer dewar 200.

The superconducting magnet in the embodiment makes full use of the overhanging length of the central support rod, greatly prolongs the heat transfer distance between the inner and outer Dewar and effectively reduces heat leakage. Meanwhile, the electromagnetic force generated by the superconducting coil is transmitted to the first supporting rod through a force transmission path and then transmitted to the supporting rod sleeve assembly through the first supporting rod, and the supporting rod sleeve assembly is connected with an external carrier to transmit the force to the moving carrier, so that the rigidity and the stability of the whole superconducting magnet are maintained.

To sum up, the utility model provides a bracing piece structure and superconducting magnet that is used for superconducting magnet under low temperature environment, the utility model provides a superconducting magnet after excitation coil can produce powerful magnetic field, constitutes DC motor with advancing coil, carries out the transmission of doing all can through superconducting magnet skeleton, interior dewar, bracing piece structure and outer dewar, finally with superconducting coil's electromagnetic force transmission to outside delivery equipment on, makes the motion carrier atress move thereupon. Therefore, the utility model provides a superconducting magnet compares with current superconducting magnet technique, the utility model discloses a pass force simple structure can compromise certain structural strength and lower heat leak rate, simple to operate between each spare part, and reverse screw's locking design area possesses high reliability, and overhanging type's bracing piece structure provides sufficient long heat transfer path simultaneously, reduces the heat leak, has reduced the loss of liquid refrigerant medium to a certain extent, can bear certain vibration impact load, and fatigue resistance can be good.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A support rod structure for superconducting magnets in a low temperature environment, the support rod structure comprising:

the supporting rod base (10), the supporting rod base (10) is fixedly arranged on an inner Dewar of the superconducting magnet;

a first supporting rod (20), wherein the first supporting rod (20) comprises a first connecting end (21), a supporting body section (22) and a second connecting end (23) which are connected, the first connecting end (21) penetrates through an outer Dewar of the superconducting magnet to be fixedly connected with the supporting rod base (10), and the supporting body section (22) and the second connecting end (23) penetrate through the outer Dewar to be arranged outside the outer Dewar;

a strut sleeve assembly (30), the strut sleeve assembly (30) being disposed outside the outer dewar, the strut sleeve assembly (30) having a center accommodating chamber, the first strut (20) being disposed in the center accommodating chamber and fixedly connected with the strut sleeve assembly (30) through the second connecting end (23), the first strut (20) being disposed coaxially with the strut sleeve assembly (30), the first strut (20) having a gap between an inner wall of the strut sleeve assembly (30).

2. The support rod structure for the superconducting magnet in the low-temperature environment according to claim 1, wherein the first support rod (20) has a first fine thread section and a second fine thread section, the first fine thread section is disposed at a first end of the first support rod (20) to form a first connection end (21), the second fine thread section is disposed at a second end of the first support rod (20) to form a second connection end (23), and the thread directions of the first fine thread section and the second fine thread section are opposite.

3. The support rod structure for superconducting magnets in low-temperature environment according to claim 2, wherein the support rod sleeve assembly (30) comprises a support rod sleeve (31) and a plug (32), the second connection end (23) is fixedly connected with the support rod sleeve assembly (30), and the plug (32) is fixedly arranged on the support rod sleeve (31).

4. A superconducting magnet for use in a cryogenic environment, the superconducting magnet comprising an inner dewar (100), an outer dewar (200) and a support rod structure (300), the support rod structure (300) being for supporting the inner dewar (100) and the outer dewar (200), the support rod structure (300) being the support rod structure (300) of any one of claims 1 to 3.

5. A superconducting magnet for use in a cryogenic environment according to claim 4, further comprising a second support rod (400), the second support rod (400) being disposed between the outer Dewar (200) and the inner Dewar (100) and being connected to the outer Dewar (200) and the inner Dewar (100), respectively, the second support rod (400) being for supporting the outer Dewar (200).

6. A superconducting magnet for use in a cryogenic environment according to claim 4, further comprising a cold shield (500) and a coolant line (600), the coolant line (600) being connected to the inner Dewar (100), the coolant line (600) being used for feeding a liquid cooling medium into the inner Dewar (100), the cold shield (500) being disposed between the inner Dewar (100) and the outer Dewar (200) and overlapping the coolant line (600), the cold shield (500) being used for reducing heat radiation from the outer Dewar (200) and shielding interference of an external high frequency magnetic field with the superconducting coil.

7. A superconducting magnet for use in a cryogenic environment according to claim 6, further comprising a bobbin fixedly disposed in the inner Dewar (100) and a superconducting coil disposed on the bobbin.

8. A superconducting magnet for use in a cryogenic environment according to claim 6 wherein the material of the inner and outer Dewar (100, 200) each comprise a titanium alloy.

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