Coil mounting structure, superconducting magnet, and superconducting magnet assembly method

Abstract

This invention discloses a coil mounting structure, a superconducting magnet, and a superconducting magnet assembly method. The coil mounting structure includes: a frame for winding the coil; and a support device including a connecting part and a positioning part. The connecting part is a columnar structure, and the positioning parts are respectively located at both ends of the connecting part. The frame is sleeved on the outer surface of the connecting part, and the two positioning parts are respectively used to insert into two Dewar end plates. When the positioning parts are inserted into the Dewar end plates, the center of the frame coincides with the center of the Dewar end plates. This invention uses a support device to mount the coil, eliminating the need for screw-type tie rods. This not only greatly reduces the number of support devices, reducing heat leakage and structural complexity, and improving assembly efficiency, but also the support device has a self-aligning function; as long as the tolerance is controlled, concentricity does not need to be adjusted.

Description

Technical Field

[0001] This invention relates to the field of superconducting technology, and in particular to a coil mounting structure, a superconducting magnet, and a method for assembling a superconducting magnet. Background Technology

[0002] Superconducting magnets are core components of advanced equipment such as maglev trains and electromagnetic guns, and their performance directly affects the quality of the overall equipment.

[0003] Currently, superconducting magnet coils are positioned and supported by tie rods. These tie rods are typically made of materials with low thermal conductivity and high tensile strength, such as carbon fiber, titanium alloy, and G10. However, due to the large number of tie rods (usually eight radial and six axial), a significant amount of heat is transferred away through them; at least one-third of the heat leakage is caused by the tie rods. This can lead to the coil's temperature failing to reach the required superconducting temperature, resulting in quench failure. Furthermore, a large number of tie rods increases structural complexity, making design and assembly processes extremely complex and demanding on skilled assembly personnel. Because some magnets have very narrow internal spaces, the complexity of the tie rod structure exacerbates the conflict between heat leakage and structural strength, making design work difficult. Moreover, the increased number of tie rods means that adjusting the concentricity between the mechanical and magnetic centers of the magnet requires a greater number of rods, making concentricity adjustment difficult. Furthermore, most magnets currently require overhead cranes to suspend them in the air during the entire assembly process. The limitations of the assembly sequence make their dependence on overhead cranes unavoidable. However, overhead cranes are very expensive and cannot be installed in large quantities. Therefore, the speed of magnet assembly is limited. Summary of the Invention

[0004] This invention provides a coil mounting structure, a superconducting magnet, and a superconducting magnet assembly method to solve the problems of severe heat leakage, difficulty in concentricity adjustment, and reliance on overhead cranes caused by the large number of tie rods used for coil mounting in the prior art.

[0005] On one hand, embodiments of the present invention provide a coil mounting structure, including:

[0006] The frame is used to wind the coil;

[0007] The support device includes a connecting part and a positioning part. The connecting part is a columnar structure, and the positioning parts are respectively located at both ends of the connecting part. The skeleton is sleeved on the outer surface of the connecting part. The two positioning parts are respectively used to insert into two Dewar end plates. When the positioning parts are inserted into the Dewar end plates, the center of the skeleton coincides with the center of the Dewar end plates.

[0008] On the other hand, embodiments of the present invention also provide a superconducting magnet, comprising:

[0009] The frame is used to wind the coil;

[0010] The support device includes a connecting part and a positioning part. The connecting part is a columnar structure, and the positioning parts are respectively located at both ends of the connecting part. The frame is sleeved on the outer surface of the connecting part.

[0011] The Dewar end plates are respectively set on both sides of the support device. The two Dewar end plates are connected together by the Dewar outer cylinder. Each of the two Dewar end plates is provided with a slot. The two positioning parts are respectively inserted into the slots on the two Dewar end plates. When the positioning parts are inserted into the Dewar end plates, the center of the frame coincides with the center of the Dewar end plate.

[0012] On the other hand, embodiments of the present invention also provide a method for assembling a superconducting magnet, comprising:

[0013] Assemble the coil onto the frame;

[0014] Assemble the skeleton onto the support device;

[0015] The cold screen end plates are assembled onto the support device, with the two cold screen end plates located on both sides of the frame.

[0016] Assemble the Dewar end plates onto the support device, with the two Dewar end plates located on either side of the cold screen end plate.

[0017] The coil mounting structure, superconducting magnet, and superconducting magnet assembly method of the present invention have the following advantages:

[0018] 1. The superconducting magnet with the coil mounting structure of the present invention has less heat leakage, which can avoid magnet quenching to a certain extent and improve the fault tolerance of the design and the magnet itself.

[0019] 2. The superconducting magnet structure using the coil mounting structure of the present invention is simpler and more reliable, which can greatly simplify the design and assembly work, and can better ensure the positional accuracy between the coil and the cold screen and Dewar, and prevent a series of problems such as pull rod breakage.

[0020] 3. The superconducting magnet using the coil mounting structure of the present invention has a self-aligning function, which can change the traditional assembly sequence, eliminate the need for overhead cranes for assembly, simplify the assembly work, and reduce equipment costs and increase assembly speed to a certain extent. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A three-dimensional structural schematic diagram of the support component provided in an embodiment of the present invention;

[0023] Figure 2 This is a side view of the support component provided in an embodiment of the present invention;

[0024] Figure 3 A top view of the cold screen end plate provided in an embodiment of the present invention;

[0025] Figure 4 This is a side view of the superconducting magnet provided in an embodiment of the present invention.

[0026] The following are the reference numerals: 1-Supporting component, 2-Cold screen end plate, 3-Dewar end plate, 4-Dewar outer cylinder, 5-Cold screen outer cylinder, 6-Frame, 7-Cold screen inner cylinder, 8-Dewar inner cylinder. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0028] Figure 1-4 This is a schematic diagram of a superconducting magnet provided in an embodiment of the present invention. An embodiment of the present invention provides a coil mounting structure, including:

[0029] Frame 6, used for winding the coil;

[0030] The support device includes a connecting part and a positioning part. The connecting part is a columnar structure, and the positioning parts are respectively located at both ends of the connecting part. The frame 6 is sleeved on the outer surface of the connecting part. The two positioning parts are respectively used to insert into the two Dewar end plates 3. When the positioning parts are inserted into the Dewar end plates 3, the center of the frame 6 coincides with the center of the Dewar end plate 3.

[0031] For example, the main body of the skeleton 6 is a hollow cylindrical structure, with two opposing baffles on its outer surface. The two baffles are parallel to each other and extend radially along the main body. The coil can be wound on the outer surface of the main body, and the position of the coil is restricted by the baffles, so that multiple layers of coils can be wound on the main body to generate a magnetic field of the required strength.

[0032] Furthermore, mounting plates are respectively provided at both ends of the connecting part, and the frame 6 is disposed on the side between the two mounting plates on the connecting part. The two mounting plates are parallel to each other and both extend radially along the connecting part. The distance between the two mounting plates is approximately equal to the axial length of the frame 6. Therefore, when the frame 6 is disposed on the connecting part, the two sides of the frame 6 can be tightly attached to the sides of the mounting plates. Then, by using connecting components, such as screws, the mounting plates and the frame 6 can be connected together to achieve a stable connection between the frame 6 and the support device.

[0033] In one possible embodiment, the support device includes two support components 1 with identical structures. Each support component 1 includes a sub-connecting part and a positioning part. The sub-connecting part and the positioning part are connected together. A frame 6 is disposed on the sub-connecting parts of the two support components 1 so that the sub-connecting parts of the two support components 1 are spliced ​​together to form a connecting part.

[0034] For example, during assembly, a sub-connector of one support component 1 is first inserted into the frame 6 from one end. The outer diameter of the sub-connector is approximately equal to the inner diameter of the frame 6, so the gap between the two after insertion is very small. Then, a sub-connector of another support component 1 is inserted into the frame 6 from the other end. When the two sub-connectors are fully inserted and pressed against the side of the mounting plate and the frame 6, the two sub-connectors inside the frame 6 also abut against each other. Finally, the two support components 1 are connected to the two ends of the frame 6 respectively by the connecting component. The two sub-connectors are then spliced ​​together to form a connecting part, and the two support components 1 also form a whole, i.e., a support device.

[0035] In one possible embodiment, a positioning boss is provided on the outer side of the positioning part, and the positioning boss is used to set the cold screen end plate 2.

[0036] For example, the positioning boss is a protruding structure set on the outer side of the positioning part. When the end of the positioning part passes through the cold screen end plate 2, the cold screen end plate 2 moves along the axis of the positioning part. When it moves to the positioning boss, it is blocked by the positioning boss and cannot continue to move. Therefore, the cold screen end plate 2 is pressed on the positioning boss, so that it maintains a certain distance from the Dewar end plate 3 and the frame 6, and will not touch during use or assembly.

[0037] This invention also provides a superconducting magnet, comprising:

[0038] Frame 6, used for winding the coil;

[0039] The support device includes a connecting part and a positioning part. The connecting part is a columnar structure, and the positioning parts are respectively located at both ends of the connecting part. The frame 6 is sleeved on the outer surface of the connecting part.

[0040] The Dewar end plates 3 are respectively set on both sides of the support device. The two Dewar end plates 3 are connected together by the Dewar outer cylinder 4. Each of the two Dewar end plates 3 is provided with a slot. The two positioning parts are respectively inserted into the slots on the two Dewar end plates 3. When the positioning parts are inserted into the Dewar end plates 3, the center of the frame 6 and the center of the Dewar end plate 3 coincide.

[0041] For example, the Dewar end plate 3 has multiple slots, each of which is a blind slot, and all slots are arranged around the center of the Dewar end plate 3. After the support device is inserted into the slot, the support device and the Dewar end plate are concentric. Since the frame 6 is set on the support device and the two are also concentric, the frame 6 and the Dewar end plate 3 remain concentric, thereby ensuring that the coil wound on the frame 6 is concentric with the Dewar end plate 3. The center of the Dewar end plate 3 represents the center of the entire superconducting magnet, and the center of the coil represents the center of the magnetic field. Therefore, the concentricity of the coil and the Dewar end plate 3 ensures that the magnetic field center and the mechanical center of the superconducting magnet are the same, without the need for additional centering operations.

[0042] Furthermore, a boss is also provided at the end of the positioning part, that is, the thickness of the end of the positioning part is less than the thickness of other positions. The shape of the slot on the Dewar end plate 3 matches the shape of the end of the positioning part, that is, a boss matching the boss at the end of the positioning part is also provided inside the slot, so that the width of the slot opening is greater than the width of other positions. With this structure, the thickness of the end of the positioning part is less than the width of the slot opening, and the positioning part can be easily inserted into the slot. After being inserted into the slot, the boss on the positioning part and the boss in the slot interact to keep them in a stable state, realizing the self-aligning function.

[0043] In one possible embodiment, it further includes: a cold screen end plate 2, two cold screen end plates 2 are respectively located on both sides of the support device, and both cold screen end plates 2 are located between two Dewar end plates 3. The two cold screen end plates 2 are connected together by a cold screen outer cylinder 5. A positioning boss is provided on the outer side of the positioning part, and the cold screen end plate 2 is set on the positioning boss.

[0044] For example, the end of the positioning boss is provided with multiple insertion rods, the cold screen end plate 2 is provided with multiple insertion holes that match the position and size of the insertion rods, and the number and position of the slots on the Dewar end plate 3 also match the insertion rods. After the insertion rods pass through the insertion holes, they are inserted into the slots.

[0045] All the sockets are through holes, and all the sockets are the same size and shape. They are all arranged around the center of the cold screen end plate 2. When the plug passes through the socket, a part of the cold screen end plate 2 extends into the positioning part through the gap between the plugs. The two cold screen end plates 2 located inside the positioning part are connected together by the cold screen inner cylinder 7 to reduce heat leakage of the cold screen.

[0046] Furthermore, after the end of the positioning part is inserted into the slot, the Dewar end plate 3 continues to extend into the interior of the positioning part, and the two ends of the Dewar end plates 3 located inside the positioning part are connected together through the inner Dewar cylinder 8 to reduce heat leakage of the Dewar.

[0047] This invention also provides a method for assembling a superconducting magnet, the method comprising:

[0048] Assemble the coil onto the frame 6;

[0049] Assemble the frame 6 onto the support device;

[0050] The cold screen end plate 2 is assembled on the support device, with the two cold screen end plates 2 located on both sides of the frame 6 respectively;

[0051] The Dewar end plate 3 is assembled on the support device, with the two Dewar end plates 3 located on both sides of the cold screen end plate 2.

[0052] For example, when assembling the coil onto the frame 6, the coil assembly needs to be manufactured according to the conventional magnet assembly sequence, including winding, curing, end treatment, and assembly of the cooling components. After the coil and frame 6 are assembled, the upper and lower support components 1 can be installed onto the frame 6 using bolts. When assembling the cold screen end plate 2 onto the support device, the lower cold screen end plate 2 should first be fitted into the lower support component 1, and then the cold screen outer cylinder 7 and the upper cold screen end plate 2 should be assembled in sequence, using the positioning boss on the support device to accurately position the cold screen.

[0053] After completing the above assembly steps, the cooling components, refrigeration unit, cold shield inner cylinder 7, Dewar inner cylinder 8, and service components need to be installed in the same order as conventional magnets.

[0054] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0055] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A coil mounting structure, characterized in that, include: The frame (6) is used for winding the coil; The support device includes a connecting part and a positioning part. The connecting part is a columnar structure. The positioning parts are respectively disposed at both ends of the connecting part. The frame (6) is sleeved on the outer side of the connecting part. The two positioning parts are respectively used to insert into the two Dewar end plates (3). When the positioning part is inserted into the Dewar end plate (3), the center of the frame (6) coincides with the center of the Dewar end plate (3). The outer side of the positioning part is provided with a positioning boss. The positioning boss is used to set the cold screen end plate (2). The end of the positioning boss is provided with multiple insert rods; Dewar end plates (3) are respectively disposed on both sides of the support device. The two Dewar end plates (3) are connected together by the outer Dewar cylinder (4). Each of the two Dewar end plates (3) is provided with a slot. The two positioning parts are respectively inserted into the slots on the two Dewar end plates (3). The slots on the Dewar end plates (3) are blind slots. The ends of the two Dewar end plates (3) located inside the positioning parts are connected together by the inner Dewar cylinder (8). The two cold screen end plates (2) are located on both sides of the support device, and both cold screen end plates (2) are located between the two Dewar end plates (3). The two cold screen end plates (2) are connected together by the cold screen outer cylinder (5). The two cold screen end plates (2) are connected together by the cold screen inner cylinder (7) at one end inside the positioning part. A positioning boss is provided on the outer side of the positioning part, and the cold screen end plates (2) are set on the positioning boss. Multiple insertion rods are provided at the end of the positioning boss. Multiple insertion holes that match the position and size of the insertion rods are provided on the cold screen end plates (2). The number and position of the slots on the Dewar end plates (3) also match the insertion rods. The insertion rods are inserted into the slots after passing through the insertion holes.

2. The coil mounting structure according to claim 1, characterized in that, The support device includes two support components (1) with the same structure. Each support component (1) includes a sub-connecting part and a positioning part. The sub-connecting part and the positioning part are connected together. The frame (6) is set on the sub-connecting parts of the two support components (1) so that the sub-connecting parts of the two support components (1) are spliced ​​together to form the connecting part.

3. The coil mounting structure according to claim 1, characterized in that, The two ends of the connecting part are respectively provided with mounting plates, and the frame (6) is provided on the side between the two mounting plates on the connecting part.

4. The coil mounting structure according to claim 3, characterized in that, The mounting plate and the frame (6) are connected together by a connecting component.

5. A superconducting magnet, characterized in that, The superconducting magnet, employing a coil mounting structure as described in any one of claims 1-4, comprises: The frame (6) is used for winding the coil; The support device includes a connecting part and a positioning part. The connecting part is a columnar structure, and the positioning parts are respectively disposed at both ends of the connecting part. The frame (6) is sleeved on the outer surface of the connecting part. Dewar end plates (3) are respectively set on both sides of the support device. The two Dewar end plates (3) are connected together by the Dewar outer cylinder (4). Both Dewar end plates (3) are provided with slots. The two positioning parts are respectively inserted into the slots on the two Dewar end plates (3). When the positioning part is inserted into the Dewar end plate (3), the center of the frame (6) coincides with the center of the Dewar end plate (3).

6. A method for assembling a superconducting magnet, characterized in that, Applied to a superconducting magnet as described in claim 5, the method includes: Assemble the coil onto the frame (6); The skeleton (6) is assembled onto the support device; The cold screen end plate (2) is assembled on the support device, and the two cold screen end plates (2) are respectively located on both sides of the frame (6); The Dewar end plates (3) are assembled on the support device, with the two Dewar end plates (3) located on both sides of the cold screen end plate (2).

7. A method for assembling a superconducting magnet according to claim 6, characterized in that, Also includes: Install the cooling components, refrigeration unit, cold shield inner cylinder, Dewar inner cylinder, and service components in sequence.

Images