Novel internally-inserted water-cooled magnet container assembly for hybrid magnet with high mechanical stability

Abstract

The invention discloses a novel internally-inserted water-cooled magnet container assembly for a hybrid magnet with high mechanical stability, which comprises an upper cylinder component, a container end cover, a hydraulic machine component, a central tube component, an inner support component, a middle cylinder component, a lower cylinder component, an electric connection component and a first conductive flexible connector, and a magnet coil assembly comprises a plurality of radially-sleeved coils; the hydraulic machine assembly comprises a cylinder body, a piston, a check ring, a pressure equalizing pad, a limiting block, a first force transmission check ring, a first anti-rotation pin, a second force transmission check ring, a second anti-rotation pin, a first force transmission column and a second force transmission column. The device has the advantages that axial force application can be performed on the magnet coil assembly, the pressing force on the magnet coil assembly is increased, the problems of tension fracture and damage caused by coil stress overrun due to overlarge radial expansion electromagnetic force of a magnet coil bit piece and an insulating piece are solved, the dismounting and maintenance process of the mixed internally-inserted water-cooled magnet device is simple and rapid, and the efficiency is high. And the dismounting efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of water-cooled magnet technology, specifically to a novel high-mechanical-stability hybrid magnet internal water-cooled magnet container assembly. Background Technology

[0002] Strong magnetic fields are important extreme conditions, providing unique extreme environments for scientific research. The structure and transformation processes of matter within these environments can undergo changes, offering new avenues and opening up new avenues for research in physics, chemistry, materials science, and biology. Because higher magnetic field strength leads to greater changes in the electronic energy states of matter systems, it results in more unusual phenomena and provides more opportunities for scientific innovation. Therefore, steady-state strong magnetic field experimental facilities, as an effective method for obtaining high magnetic fields, have become an irreplaceable and crucial tool for conducting cutting-edge basic research in condensed matter physics, magnetism, materials science, chemistry, life sciences, and medicine.

[0003] Water-cooled magnets are the main experimental apparatus in steady-state high magnetic field laboratories. Due to their high magnetic field strength, fast excitation speed, and high experimental efficiency, they are a highly regarded extreme condition experimental platform. Water-cooled magnets have high magnetic field strengths, reaching up to 42T or more, and consume power in the tens of megawatts range. The water-cooled magnets use high-speed deionized cooling water to remove a large amount of Joule heat, ensuring that the magnet temperature remains normal.

[0004] A water-cooled magnet is a device that generates a magnetic field by connecting multiple water-cooled magnet coils in parallel or series and passing a certain current through them. During operation, the coils are in an extreme working state, generating extremely high-power heat and strong electromagnetic force. If the coils are not cooled effectively and in time, they will melt into a metal block instantly. If the electromagnetic force is not effectively and reliably withstood, the coil components may become misaligned, the coils may rotate inside the container, damaging the coils and the connections and supporting components between them, causing the device to malfunction.

[0005] Bitter-type water-cooled magnets have a structure completely different from traditional solenoids. To manufacture a bitter-type water-cooled magnet, numerous holes are first distributed between copper or copper alloy and insulating sheets. Hundreds or even thousands of copper sheets are then stacked to form a complete coil. Multiple coils of different specifications constitute the magnet. The advantage of this type of magnet is that high-pressure deionized water flows rapidly through the cooling holes, quickly carrying away the heat generated when the magnet is energized, resulting in excellent cooling. Simultaneously, because the magnet coil is a single, integral structure, it possesses strong mechanical properties. Therefore, water-cooled magnets using this principle can achieve a magnetic field of 420,000 gauss.

[0006] BITTER-type water-cooled magnets can generate a magnetic field of 420,000 gauss, while superconducting magnets can generate a magnetic field of over 200,000 gauss. However, to make a BITTER-type water-cooled magnet rotate, the energy input of a small thermal power plant is required; if a higher magnetic field is desired, the energy must be doubled. Furthermore, the performance of existing materials is no longer sufficient, with both electrical conductivity and mechanical properties facing significant challenges. While superconducting magnets achieve magnetic fields much more easily without requiring as much energy, their critical magnetic field is definite and cannot be surpassed. Combining water-cooled magnets and superconducting magnets, leveraging their respective strengths and compensating for their weaknesses, allows for the combined generation of a magnetic field, resulting in high efficiency and excellent performance. This is the concept of hybrid magnets.

[0007] With the development of magnet technology, especially with magnetic field strength reaching 38.5T or higher, the clamping force of the magnet coil is insufficient under the action of strong electromagnetic force, resulting in misalignment, deformation or even damage of the bit plates on the magnet coil. Summary of the Invention

[0008] The technical problem to be solved by this invention is how to solve the problem of bit misalignment, deformation or even damage caused by insufficient clamping force of the magnet coil.

[0009] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0010] A novel water-cooled magnet container assembly for a high-mechanical-stability hybrid magnet includes an upper cylinder assembly, a container end cap, a hydraulic press assembly, a central tube assembly, an inner support assembly, a middle cylinder assembly, a lower cylinder assembly, and an electrical connection assembly. The container end cap is located on top of the upper cylinder assembly, and its inner ring is connected to the outer ring of the hydraulic press assembly. The inner ring of the hydraulic press assembly is connected to the top of the central tube assembly. The top of the upper cylinder assembly is connected to the lower cylinder assembly through the middle cylinder assembly. The inner support assembly is located inside the upper cylinder assembly to support the magnet coil assembly located inside the upper cylinder assembly. The bottom of the central tube assembly is connected to the inner support assembly. Two electrical connection assemblies pass through the middle cylinder assembly and are electrically connected to the inner support assembly through a first conductive flexible connector. An installation window is provided on the middle cylinder assembly near the first conductive flexible connector.

[0011] The hydraulic press assembly includes a cylinder body, piston, stop ring, pressure equalizing pad, limit block, first force transmission stop ring, first anti-rotation pin, second force transmission stop ring, second anti-rotation pin, first force transmission column, and second force transmission column. The upper inner ring of the cylinder body is externally sealed to the top of the central tube assembly, and the upper outer ring of the cylinder body is connected to the inner ring of the container end cap. A piston and limit block are installed inside the cylinder body. A stop ring and pressure equalizing pad are installed at the bottom of the cylinder body. A first force transmission stop ring and a second force transmission stop ring are installed at the bottom of the pressure equalizing pad. The first force transmission stop ring is connected to the cylinder body via a first anti-rotation pin. The force-stopping ring is connected to the stop ring via the second anti-rotation pin. Multiple first force-transmitting columns are connected to the first force-transmitting stop ring, and multiple second force-transmitting columns are connected to the second force-transmitting stop ring. The first force-transmitting columns are insulated from the innermost coil in the magnet coil assembly, and the second force-transmitting columns are insulated from the coils adjacent to the innermost coil. This pushes the piston downward, transmitting the hydraulic pressure to the pressure equalizing pad, which in turn transmits it to the first force-transmitting stop ring, the second force-transmitting stop ring, the first force-transmitting column, and the second force-transmitting column, thereby applying the hydraulic pressure to the two innermost coils of the magnet coil assembly.

[0012] This invention, through the configuration of the hydraulic press component, can apply axial force to the magnet coil assembly, increase the clamping force on the magnet coil assembly, and thus increase the magnet coil assembly's ability to resist external electromagnetic forces. This solves the problems of excessive radial expansion electromagnetic forces on the magnet coil bit plates and insulating plates during the operation of water-cooled magnets, leading to radial expansion and misalignment of the bit plates and insulating plates, blockage of water flow channels, and overheating or even melting of the coil. It also solves the problem of excessive radial expansion forces causing the coil stress to exceed limits, resulting in cracking and damage.

[0013] Furthermore, this invention only requires opening the installation window and disassembling the first conductive flexible connector and electrical connection assembly from within the installation window. Then, simply lift the container end cap, and the liquid press assembly, central tube assembly, and magnet coil assembly will be lifted along with the container end cap, allowing the magnet coil assembly to be removed from the superconducting magnet for maintenance. During the removal of the magnet coil assembly, it is not necessary to remove the external water pipes, external electrical connection equipment, and upper, middle, and lower cylinders that are connected to the hybrid internal water-cooled magnet device. The removal and maintenance process is simple and quick, improving removal efficiency.

[0014] Preferably, the cylinder body is evenly distributed with first anti-rotation pin grooves, the first force transmission stop ring is circumferentially provided with a first countersunk bolt connection hole, one end of the first anti-rotation pin is engaged in the first anti-rotation pin groove, and the other end is threadedly connected to the first countersunk bolt connection hole.

[0015] Preferably, the stop ring is evenly distributed with second anti-rotation pin grooves, and the second force transmission stop ring is provided with a second countersunk bolt connection hole in the circumferential direction. One end of the second anti-rotation pin is engaged in the second anti-rotation pin groove, and the other end is threadedly connected to the second countersunk bolt connection hole.

[0016] Preferably, a first insulating sleeve is fitted on the top of the second force transmission column, a second insulating sleeve is fitted on the bottom of the first force transmission column, and a third insulating sleeve is fitted on the bottom of the second force transmission column.

[0017] Preferably, the upper cylinder assembly includes an upper outer cylinder, an upper inner cylinder, a filter screen, a first end ring, a second end ring, a third end ring, and a main support plate;

[0018] The upper outer cylinder and the upper inner cylinder are arranged at intervals to form a double-layer structure with a first high-pressure water inlet chamber. The top of the upper inner cylinder has a waist-shaped hole, which connects the first high-pressure water inlet chamber with the inner cavity of the upper inner cylinder. A filter screen is installed on the waist-shaped hole. An insulating layer is cured on the inner wall of the upper inner cylinder. The top of the double-layer structure is sealed and connected to the container end cap through a first end ring. A second end ring is provided on the inner wall of the middle part of the upper inner cylinder for fixing the outermost coil of the magnet coil assembly. The bottom of the double-layer structure is connected to the middle cylinder assembly through a third end ring. The third end ring is provided with an upper cylinder cooling water channel that communicates with the first high-pressure water inlet chamber. The main support plate for fixing the inner support assembly is connected to the center of the third end ring. Multiple fan-shaped through holes are arranged in a circumferential array on the main support plate.

[0019] Preferably, the middle cylinder assembly includes an outer middle cylinder, an inner middle cylinder, an upper middle cylinder ring, a middle middle cylinder ring, a high-pressure water inlet pipe, a low-pressure water outlet pipe, a lower middle cylinder ring, and a lower middle cylinder cover;

[0020] The outer cylinder and the inner cylinder are arranged at intervals to form a double-layer structure with a second high-pressure water inlet chamber. The top of the double-layer structure is sealed by the upper end ring of the middle cylinder and connected to the third end ring. The upper end ring of the middle cylinder is provided with a cooling water channel for the middle cylinder that communicates with the cooling water channel of the upper cylinder. The bottom of the double-layer structure is sealed by the middle end ring of the middle cylinder. The outer cylinder is provided with a high-pressure water inlet pipe, and the inner cylinder is provided with a low-pressure water outlet pipe. The inner cylinder is connected to the lower cylinder assembly through the lower end ring of the middle cylinder. The lower cover of the middle cylinder is sealed to the lower end ring of the middle cylinder to seal the inner cylinder. The electrical connection assembly passes through the outer cylinder and the inner cylinder in sequence and is electrically connected to the inner support assembly through the first conductive flexible connector.

[0021] Preferably, the inner support assembly includes an inner support frame, a stop-insulating support plate, an anti-rotation stop-insulating frame, an electrical connection inlet, and an electrical connection outlet. The inner support frame has an I-shaped cross-section. The bottom of the inner support frame is fixed to the main support plate, and the stop-insulating support plate is fixed to the top of the inner support frame to support the magnet coil assembly. Multiple anti-rotation stop-insulating frames are spaced apart on the inner support frame along its height direction. One end of the electrical connection inlet is electrically connected to a set of first conductive flexible connectors, and the other end is electrically connected to the innermost coil of the magnet coil assembly. One end of the electrical connection outlet is electrically connected to another set of first conductive flexible connectors, and the other end is electrically connected to the outermost coil of the magnet coil assembly. Both the electrical connection inlet and the electrical connection outlet are connected to the anti-rotation stop-insulating frame. The inner support frame, the stop-insulating support plate, and the anti-rotation stop-insulating frame all have through-holes for cooling water.

[0022] Preferably, the electrical connection assembly includes an electrode connector, an electrode, an insulating positioning plate, an insulating ring, and an insulating sealing plate;

[0023] The electrode connector passes through the outer cylinder and the inner cylinder of the middle cylinder and is fixed on the outer cylinder and the inner cylinder of the middle cylinder. An insulating ring is provided on the inner wall of the electrode connector. The electrode is fixed on the electrode connector by an insulating positioning plate and an insulating sealing plate and is electrically connected to the first conductive flexible connector after passing through the electrode connector.

[0024] Preferably, the central tube assembly includes a central tube, an upper pressure ring, and a metal end cap. The central tube passes through the magnet coil assembly and the cylinder body. The central tube is insulated from the innermost coil. The upper inner ring of the cylinder body is sealed to the outer top of the central tube through the upper pressure ring. The bottom of the central tube is sealed to the inner support assembly through the metal end cap.

[0025] Preferably, the lower cylinder assembly is a metal cylinder, the top of which is connected to the lower end ring of the middle cylinder, and an installation inlet is provided on the side wall of the metal cylinder.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. This invention, through the setting of the hydraulic press component, can apply axial force to the magnet coil assembly, increase the clamping force on the magnet coil assembly, and thus increase the magnet coil assembly's ability to resist external electromagnetic force. This solves the problems of excessive radial expansion electromagnetic force on the magnet coil bit plates and insulating plates during the operation of water-cooled magnets, causing radial expansion and misalignment of the bit plates and insulating plates, blockage of water flow channels, and overheating or even melting of the coil. It also solves the problems of excessive radial expansion force causing the coil stress to exceed the limit, resulting in cracking and damage.

[0028] 2. In this invention, it is only necessary to open the installation window and disassemble the first conductive flexible connector and the electrical connection assembly from the installation window. Then, it is only necessary to lift the container end cap, and the liquid press assembly, the central tube assembly and the magnet coil assembly are lifted along with the container end cap, so that the magnet coil assembly can be removed from the superconducting magnet for maintenance. During the removal of the magnet coil assembly, it is not necessary to remove the external water pipes, external electrical connection equipment and upper, middle and lower cylinders that are connected to the hybrid internal water-cooled magnet device. The removal and maintenance process is simple and fast, which improves the removal efficiency. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the hybrid internal water-cooled magnet device according to an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the container assembly according to an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the upper cylinder assembly according to an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the cylindrical assembly in an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of the hydraulic press assembly according to an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of the hybrid magnet in an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the magnet coil assembly according to an embodiment of the present invention;

[0036] Figure 8 This is a schematic cross-sectional view of coil A and coil B in embodiment of the present invention;

[0037] Figure 9 This is a schematic diagram of the structure of the insulating cylinder assembly according to an embodiment of the present invention;

[0038] Figure 10 This is a schematic diagram of the structure of the insulating sheet according to an embodiment of the present invention;

[0039] Figure 11 This is an assembly diagram of coil A and coil B in embodiment of the present invention;

[0040] Figure 12 This is a partial structural diagram of coils A and B in an embodiment of the present invention;

[0041] Figure 13 This is another partial structural diagram of coils A and B in embodiment of the present invention;

[0042] Figure 14 This is a schematic diagram of the coil end plate in Embodiment A of the present invention;

[0043] Figure 15 This is a schematic diagram of the structure of the electrode cylinder on the first A coil according to an embodiment of the present invention;

[0044] Figure 16 This is a schematic diagram of the structure of the electrode cylinder on the second A coil according to an embodiment of the present invention;

[0045] Figure 17 This is a schematic diagram of the structure of the lower electrode cylinder of the first A coil in an embodiment of the present invention;

[0046] Figure 18 This is a schematic diagram of the structure of the lower electrode cylinder of the second A coil in an embodiment of the present invention;

[0047] Figure 19 This is a schematic diagram of the insulating anti-rotation structure according to an embodiment of the present invention;

[0048] Figure 20This is an assembly diagram of the insulating anti-rotation structure and the BC electrical connection plate according to an embodiment of the present invention;

[0049] Figure 21 This is a schematic diagram of the coil end plate in Embodiment B of the present invention;

[0050] Figure 22 This is a schematic diagram of the structure of the electrode cylinder on the first B coil according to an embodiment of the present invention;

[0051] Figure 23 This is a schematic diagram of the structure of the electrode cylinder on the second B coil according to an embodiment of the present invention;

[0052] Figure 24 This is a schematic diagram of the structure of the lower electrode cylinder of the first B coil in an embodiment of the present invention;

[0053] Figure 25 This is a schematic diagram of the structure of the lower electrode cylinder of the second B coil in an embodiment of the present invention;

[0054] Figure 26 This is a schematic diagram of the structure of coil C in embodiment C of the present invention;

[0055] Figure 27 This is a schematic diagram of the structure of the coil end plate in Embodiment C of the present invention;

[0056] Figure 28 This is a schematic diagram of the structure of the electrode cylinder on the coil in Embodiment C of the present invention;

[0057] Figure 29 This is a schematic diagram of the structure of the lower electrode cylinder of coil C in embodiment C of the present invention;

[0058] Figure 30 This is a schematic diagram of the structure of coil E in embodiment E of the present invention;

[0059] Figure 31 This is a schematic diagram of the structure of the coil end plate in embodiment E of the present invention;

[0060] Figure 32 This is a schematic diagram of the structure of coil F in an embodiment of the present invention;

[0061] Figure 33 This is a schematic diagram of the structure of the F coil end plate according to an embodiment of the present invention;

[0062] Figure 34 This is a schematic diagram of the structure of the F magnet coil in an embodiment of the present invention;

[0063] Figure 35 This is a schematic diagram of the transition electrical connection ring in Embodiment F of the present invention. Detailed Implementation

[0064] To facilitate understanding of the technical solution of the present invention by those skilled in the art, the technical solution of the present invention will now be further described in conjunction with the accompanying drawings.

[0065] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0066] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically limited.

[0067] See Figure 1 This embodiment discloses a hybrid internal water-cooled magnet device, including a container assembly 1 and a magnet coil assembly 2. The magnet coil assembly 2 is located inside the container assembly 1 and communicates with the container assembly 1.

[0068] See Figure 2 The container assembly 1 includes an upper cylinder assembly 11, a container end cap 12, a hydraulic press assembly 13, a central tube assembly 14, an inner support assembly 15, a middle cylinder assembly 16, a lower cylinder assembly 17, an electrical connection assembly 18, and a first conductive flexible connector 19. The container end cap 12 is placed on top of the upper cylinder assembly 11. The inner ring of the container end cap 12 is connected to the outer ring of the hydraulic press assembly 13. The inner ring of the hydraulic press assembly 13 is connected to the top of the central tube assembly 14. The top of the upper cylinder assembly 11 is connected to the lower cylinder assembly 17 through the middle cylinder assembly 16. The inner support assembly 15 is disposed inside the upper cylinder assembly 11 to support the magnet coil assembly 2 disposed inside the upper cylinder assembly 11 and is electrically connected to the magnet coil assembly 2. The bottom of the central tube assembly 14 is connected to the inner support assembly 15. The two electrical connection assemblies 18 pass through the middle cylinder assembly 16 and are electrically connected to the inner support assembly 15 through the first conductive flexible connector 19.

[0069] See Figure 3The upper cylinder assembly 11 includes an outer cylinder 111, an inner cylinder 112, a filter screen 113, a first end ring 114, a second end ring 115, a third end ring 116, and a main support plate 117. The outer cylinder 111 and the inner cylinder 112 are arranged at intervals to form a double-layer structure with a first high-pressure water inlet chamber. The top of the inner cylinder 112 has a waist-shaped hole, which connects the first high-pressure water inlet chamber with the inner cavity of the inner cylinder 112. A filter screen 113 is installed on the waist-shaped hole. An insulating layer is cured on the inner wall of the inner cylinder 112. The double-layer structure is top-... The upper cylinder is sealed and connected to the container end cap 12 by the first end ring 114. The inner wall of the upper cylinder 112 is provided with a second end ring 115 for fixing the outermost coil of the magnet coil assembly 2. The bottom of the double-layer structure is connected to the middle cylinder assembly 16 by the third end ring 116. The third end ring 116 is provided with an upper cylinder cooling water channel that communicates with the first high-pressure water inlet chamber. The main support plate 117 for fixing the inner support assembly 15 is connected to the center of the third end ring 116. The main support plate 117 is provided with a plurality of fan-shaped through holes arranged in a circumferential array.

[0070] See Figure 4 The middle cylinder assembly 16 includes an outer middle cylinder 161, an inner middle cylinder 162, an upper middle cylinder ring 163, a middle middle cylinder ring 164, a high-pressure water inlet pipe 165, a low-pressure water outlet pipe 166, a lower middle cylinder ring 167, a lower middle cylinder cover 168, and a positioning frame 169. The outer middle cylinder 161 and the inner middle cylinder 162 are arranged at intervals to form a double-layer structure with a second high-pressure water inlet chamber. The top of the double-layer structure is sealed by the upper middle cylinder ring 163 and connected to a third end ring 116. The upper middle cylinder ring 163 is provided with a middle cylinder cooling water channel communicating with the upper cylinder cooling water channel for the flow of high-pressure water. The bottom of the double-layer structure is connected by the middle cylinder ring 164. The end ring 164 is sealed. The outer cylinder 161 of the middle cylinder is provided with a high-pressure water inlet pipe 165. The inner cylinder 162 of the middle cylinder is provided with a low-pressure water outlet pipe 166. The inner cylinder 162 of the middle cylinder is connected to the lower cylinder assembly 17 through the lower end ring 167 of the middle cylinder. The lower cover 168 of the middle cylinder is sealed to the lower end ring 167 of the middle cylinder by screws and sealing rings to seal the inner cylinder 162 of the middle cylinder. The electrical connection assembly 18 passes through the outer cylinder 161 and the inner cylinder 162 of the middle cylinder in sequence and is electrically connected to the inner support assembly 15 through the first conductive flexible connector 19. The electrical connection assembly 18 is positioned and fixed on the inner wall of the inner cylinder 162 by a fixed positioning frame 169.

[0071] An installation window 1601 is provided on the middle cylinder assembly 16 near the first conductive flexible connector 19 for installing the first conductive flexible connector 19 and the electrical connection assembly 18.

[0072] The lower cylinder assembly 17 is a metal cylinder, the top of which is connected to the lower end ring 167 of the middle cylinder, and an installation inlet 171 is provided on the side wall of the metal cylinder.

[0073] See also Figure 4The electrical connection assembly 18 includes an electrode connector 181, an electrode 182, an insulating positioning plate 183, an insulating ring 184, and an insulating sealing plate 185. The electrode connector 181 passes through the outer cylinder 161 and the inner cylinder 162 of the middle cylinder and is fixed on the outer cylinder 161 and the inner cylinder 162 of the middle cylinder. An insulating ring 183 is provided on the inner wall of the electrode connector 181. The electrode 182 is fixed on the electrode connector 181 through the insulating positioning plate 183 and the insulating sealing plate 185 and passes through the electrode connector 181 and is electrically connected to the first conductive flexible connector 19.

[0074] See Figure 5 The hydraulic press assembly 13 includes a cylinder body 1301, a piston 1302, a stop ring 1303, a pressure equalizing pad 1304, a limit block 1305, a first force transmission stop ring 1306, a first anti-rotation pin 1307, a second force transmission stop ring 1308, a second anti-rotation pin 1309, a first insulating sleeve 1310, a first force transmission column 1311, a second force transmission column 1312, and an insulating plate 1313. The upper inner ring of the cylinder body 1301 is sealed to the top of the center tube assembly 14, and the upper outer ring of the cylinder body 1301 is connected to the inner ring of the container end cap 12. A piston 1 is installed inside the cylinder body 1301. 302 and limiting block 1305, the limiting block 1305 is used to limit the movement position of piston 1302 in cylinder body 1301. A stop ring 1303 and a pressure equalizing pad 1304 are provided at the bottom of cylinder body 1301. A first force transmission stop ring 1306 and a second force transmission stop ring 1308 are provided at the bottom of pressure equalizing pad 1304. First anti-rotation pin grooves are evenly distributed on cylinder body 1301. A first countersunk bolt connection hole is provided circumferentially on the first force transmission stop ring 1306. One end of the first anti-rotation pin 1307 is engaged in the first anti-rotation pin groove on cylinder body 1301, and the other end is connected to the first force transmission stop ring 1308. The first countersunk bolt connection hole on the first force transmission stop ring 1306 is threaded to restrict the rotation of the first force transmission stop ring 1306. The stop ring 1306 has evenly distributed second anti-rotation pin grooves. The second force transmission stop ring 1308 has a second countersunk bolt connection hole circumferentially arranged. One end of the second anti-rotation pin 1309 is engaged in the second anti-rotation pin groove on the stop ring 1306, and the other end is threaded to the second countersunk bolt connection hole on the second force transmission stop ring 1308 to restrict the rotation of the second force transmission stop ring 1308. Multiple first force transmission columns 1311 are connected to the first force transmission stop ring 1306. One end of the column 1311 away from the first force transmission stop ring 1306 is insulated from the innermost coil of the magnet coil assembly 2. Multiple second force transmission columns 1312 are connected to the second force transmission stop ring 1307, and a first insulating sleeve 1310 is provided at the position where the second force transmission column 1312 is connected to the second force transmission stop ring 1307 for insulation. One end of the second force transmission column away from the second force transmission stop ring 1307 is insulated from the coil adjacent to the innermost coil of the magnet coil assembly 2. An insulating plate 1313 is also provided between the magnet coil assembly 2 and the first force transmission stop ring 1306 for insulation.

[0075] Furthermore, a second insulating sleeve 1314 is fitted at the position where the bottom of the first force transmission column 1311 is insulated from the innermost coil of the magnet coil assembly 2, for insulation between the first force transmission column 1311 and the magnet coil assembly 2. A third insulating sleeve 1315 is fitted at the bottom of the second force transmission column 1312 for insulation between the second force transmission column 1312 and the magnet coil assembly 2.

[0076] Furthermore, a hydraulic medium input pipe 1316 is provided on the cylinder body 1301 for inputting hydraulic medium into the cylinder body 1301.

[0077] Specifically, by pushing the piston 1302 downward, the hydraulic pressure is transmitted to the pressure equalizing pad 1304, and then to the first force transmission stop ring 1306, the second force transmission stop ring 1308, the first force transmission column 1311, and the second force transmission column 1312, thereby applying the hydraulic pressure to the two innermost coils of the magnet coil assembly 2.

[0078] In this embodiment, the hydraulic press assembly 13 can apply axial force to the magnet coil assembly 2, thereby increasing the clamping force on the magnet coil assembly 2 and increasing the magnet coil assembly 2's ability to resist external electromagnetic force. This solves the problems of excessive radial expansion electromagnetic force on the magnet coil bit pieces and insulating pieces during water-cooled magnet operation, causing radial expansion and misalignment of the bit pieces and insulating pieces, blockage of the water flow channel, and overheating or even melting of the coil. It also solves the problems of excessive radial expansion force causing the coil stress to exceed the limit, resulting in cracking and damage.

[0079] See also Figure 3 The central tube assembly 14 includes a central tube 141, an upper pressure ring 142, and a metal end cap 143. The central tube 141 passes through the magnet coil assembly 2 and the cylinder 1301. The central tube 141 is insulated from the innermost coil of the magnet coil assembly 2 through an insulating sleeve. The upper inner ring of the cylinder 1301 is sealed to the outer top of the central tube 141 through the upper pressure ring 142. The bottom of the central tube 141 is sealed to the inner support assembly 15 through the metal end cap 143. In this embodiment, the central tube 141 is a hollow metal tube with an insulating layer wrapped around its outer surface. The insulating layer is made of high-strength glass fiber and epoxy resin, which is integrally cured onto the outer wall of the metal tube. Multiple evenly distributed grooves are machined into the outer wall to serve as cooling water channels. This structure has good insulation and strong structural stability. In contrast, the traditional method of bonding insulating strips is prone to detachment, and the detached material may block the cooling channels.

[0080] The inner support assembly 15 includes an inner support frame 151, a stop-insulating support plate 152, an anti-rotation stop-insulating frame 153, an electrical connection inlet 154, and an electrical connection outlet 155. The inner support frame 151 has an I-shaped cross-section. The bottom of the inner support frame 151 is fixed to the main support plate 117, and the stop-insulating support plate 153 is fixed to the top of the inner support frame 151 to support the magnet coil assembly 2. Multiple anti-rotation stop-insulating frames 153 are spaced apart on the inner support frame 151 along its height direction. One end of the electrical connection inlet 154 is electrically connected to a set of first conductive flexible connectors 19, and the other end is electrically connected to the innermost coil of the magnet coil assembly 2. One end of the electrical connection outlet 155 is electrically connected to another set of first conductive flexible connectors 19, and the other end is electrically connected to the outermost coil of the magnet coil assembly 2. Both the electrical connection inlet 154 and the electrical connection outlet 155 are connected to the anti-rotation stop insulating frame 153. The inner support frame 151, the stop insulating support plate 152, and the anti-rotation stop insulating frame 153 all have through cooling water through holes.

[0081] See Figure 6 It should be noted that the hybrid internal water-cooled magnet device is installed inside the superconducting magnet 10. During long-term operation, the magnet coil assembly inside the hybrid internal water-cooled magnet device needs to be repaired. However, the external superconducting magnet 10 is not allowed to be moved during the repair. The current repair process is to first remove and transport out the lower cylinder of the hybrid internal water-cooled magnet device, so that the upper cylinder and the middle cylinder fall together. Then, the upper cylinder is lifted, the middle cylinder is removed and transported out, the upper cylinder is lowered and transported out, and finally the magnet coil assembly inside the upper cylinder is removed for repair. In the entire dismantling and repair process, it is necessary to remove the external water pipes, external electrical connection equipment, and the upper, middle and lower cylinders connected to the hybrid internal water-cooled magnet device. The dismantling and repair is complicated, time-consuming and labor-intensive, which greatly affects the dismantling efficiency.

[0082] In this application, it is only necessary to open the installation window 1601 and disconnect the first conductive flexible connector 19 from the electrical connection assembly 18 from the installation window 1601. Then, it is only necessary to lift the container end cap 12, and the liquid press assembly 13, the central tube assembly 14 and the magnet coil assembly 2 will be lifted along with the container end cap 12, so that the magnet coil assembly 2 can be removed from the superconducting magnet 10 for maintenance. During the removal of the magnet coil assembly 2, it is not necessary to remove the external water pipe, external electrical connection equipment and upper, middle and lower cylinders that are connected to the mixed internal water-cooled magnet device. The removal and maintenance process is simple and fast, which improves the removal efficiency.

[0083] See Figure 7The magnet coil assembly 2 includes multiple radially connected coils, with insulation between adjacent coils, between the outer wall of the central tube 141 and the innermost coil, and between the outermost coil and the inner wall of the upper cylinder 112; adjacent coils are connected in series; the top and bottom of the coils are connected to the top or bottom of the container assembly 2 through an insulating anti-rotation structure 9.

[0084] The magnet coil assembly 2 includes six coils A 21, B 22, C 23, D 24, E 25, and F 26 that are radially connected in series, and a first electrical connector 27. One end of the first electrical connector 27 is electrically connected to the innermost coil A 21, and the other end is electrically connected to the electrical connection inlet 154. The outermost coil F 26 is electrically connected to the electrical connection outlet 155.

[0085] Coil A 21 and coil B 22 are electrically connected via AB electrical connection plate 4; coil B 22 and coil C 23 are electrically connected via BC electrical connection plate 5; coil C 23 and coil D 24 are electrically connected via CD electrical connection plate 6; coil D 24 and coil E 25 are electrically connected via DE electrical connection plate 7; coil E 25 and coil F 26 are electrically connected via EF electrical connection plate 8; AB electrical connection plate 4 is insulated from hydraulic press assembly 13; BC electrical connection plate 5, CD electrical connection plate 6, DE electrical connection plate 7, and EF electrical connection plate 8 are all connected to container assembly 1 via insulated anti-rotation structure 9.

[0086] See Figure 8 The insulation between coil A 21 and coil B 22 is achieved through the insulating tube assembly 3. The insulation between coil B 22 and coil C 23, between coil C 23 and coil D 24, between coil D 24 and coil E 25, and between coil E 25 and coil F 26 is also achieved through the insulating tube. It should be noted that the insulating tube is available in the current market.

[0087] See Figure 9 and Figure 10 The insulating cylinder assembly 3 is formed by circumferentially splicing multiple insulating sheets 31 to form a cylindrical structure. Each insulating sheet 31 has a protrusion 311 on its inner and outer walls along the length of the insulating sheet 31. The space between adjacent protrusions 311 is a cooling water channel. Each insulating sheet 31 has a positioning boss 312 at both ends along its length on its inner wall. The positioning bosses 312 on adjacent insulating sheets fit together to form a boss group. The outer side of coil A is provided with a corresponding slot for engaging the boss group (not shown in the figure).

[0088] See Figures 11 to 13The A coil 21 includes an A magnet coil 211, an A coil end plate 212, an A coil upper electrode cylinder 213, an upper locking nut 214, an upper anti-loosening screw, an A coil lower electrode cylinder 215, an insulating collar 216, a lower locking nut 217, a lower anti-loosening nut, and an A coil transition connecting cylinder 218. The A coil upper electrode cylinder 213 includes a first A coil upper electrode cylinder 2131 and a second A coil upper electrode cylinder 2132 connected together. The A coil lower electrode cylinder 215 includes a first A coil lower electrode cylinder 2151 and a second A coil lower electrode cylinder 2152 connected together.

[0089] The upper and lower ends of magnet coil 211 are connected to coil end plate 212. The end of the first upper electrode cylinder 2131 away from the second upper electrode cylinder 2132 is connected to the upper end of coil end plate 212. The end of the second upper electrode cylinder 2132 away from the first upper electrode cylinder 2131 is electrically connected to coil B 22 through AB electrical connection plate 4. An upper locking nut 214 and an upper anti-loosening screw are also provided on the second upper electrode cylinder 2132 from bottom to top. The second upper electrode cylinder 2132 is connected to coil B 22 through the upper locking nut 214 and the upper anti-loosening screw. Electrical connection: the end of the first force transmission column 1311 away from the first force transmission stop ring 1306 is insulated and connected to the AB electrical connection plate 4 through a hydraulic insulating sleeve; the end of the first A coil lower electrode cylinder 2151 away from the second A coil lower electrode cylinder 2152 is connected to the lower A coil end plate 212; the end of the second A coil lower electrode cylinder 2152 away from the first A coil lower electrode cylinder 2151 is connected to the A coil transition connection cylinder 218; one end of the first electrical connector 27 is connected between the A coil transition connection cylinder 218 and the stop insulating support plate 152, and the other end is connected to the electrical connection inlet 154.

[0090] An insulating collar 216 is also fitted on the outer wall of the lower end of the lower electrode cylinder 2152 of the second A coil for insulation from the B coil 22. A lower locking nut 217 and a lower anti-loosening nut are provided outside the insulating collar 216 for locking the lower electrode cylinder 215 of the A coil. The end of the first electrical connector 27 extending into the cylinder wall assembly 11 is electrically connected to the transition connecting cylinder 218 of the A coil.

[0091] See Figures 14 to 18 Multiple A-coil cooling channels are provided on the A-coil end plate 212, the A-coil upper electrode cylinder 213, and the A-coil lower electrode cylinder 215. Multiple A-coil axial cooling channels 2121 are provided on the A-coil end plate 212, the first A-coil upper electrode cylinder 2131, and the first A-coil lower electrode cylinder 2151, and multiple A-coil lateral cooling channels 21312 are provided on the first A-coil upper electrode cylinder 2131 and the first A-coil lower electrode cylinder 2151.

[0092] Multiple radial threaded holes on the upper electrode cylinder 2132 of the second A coil are used to fasten the AB electrical connection plate 4 with screws. The upper electrode cylinder 2132 of the second A coil is provided with a pressure bearing surface 1, a pressure bearing surface 2, and a pressure bearing surface 3. The pressure bearing surface 1 is used to bear the force transmitted from the B coil 22 to the A coil 21 through the upper locking nut 214 and the upper anti-loosening screw, and at the same time realizes the electrical connection between the A coil 21 and the B coil 22. The pressure bearing surface 2 is used to bear the hydraulic pressure transmitted from the hydraulic press assembly 13 to the insulating plate 1313. Multiple axial holes are provided on it for installing the hydraulic insulating sleeve. The pressure bearing surface 3 is the connection surface between the upper electrode cylinder 2132 of the second A coil and the upper electrode cylinder 2131 of the first A coil.

[0093] The first A coil lower electrode cylinder 2151 has multiple circumferential grooves and an axial cooling channel 2121 for the A coil on both ends of its large diameter end to increase the cooling water flow. The small diameter end face has multiple threaded holes for circumferential positioning with the second A coil lower electrode cylinder 2152 via threaded cylindrical pins. The first A coil lower electrode cylinder 2151 is shaped like a flared mouth to enhance the internal water flow channel of the A coil 21. The second A coil lower electrode cylinder 2152 has a pressure-bearing surface 4, a pressure-bearing surface 5, and a pressure-bearing surface 6. The pressure-bearing surface 4 is used to install an insulating collar 216 to achieve lower insulation between the A coil 21 and the B coil 22 and to withstand the force transmitted from the B coil 22 to the A coil 21 through the lower locking nut 217 and the lower anti-loosening nut. The pressure-bearing surface 5 is used to withstand the hydraulic pressure applied by the hydraulic press assembly 13, and multiple axial holes are provided on it for installing and securing the A coil transition connecting cylinder 218. The pressure-bearing surface 6 is the connection surface between the first A coil lower electrode cylinder 2151 and the second A coil lower electrode cylinder 2152.

[0094] A first limiting groove 2122 is provided on the outer circumference of the end plate 212 of coil A, a second limiting groove 21311 is provided on the outer circumference of the upper electrode cylinder 2131 of the first coil A, and a positioning groove 21511 is provided on the outer circumference of the lower electrode cylinder 2151 of the first coil A. The first limiting groove 2122, the second limiting groove 21311 and the positioning groove 21511 are connected to form a locking groove for engaging a boss assembly composed of two positioning bosses 312. The positioning groove 21511 is stepped, and the bottom of the positioning groove 21511 fits against the bottom surface of the boss assembly to limit the movement of the boss assembly. This prevents the insulating sheet 31 from moving downwards when the high-pressure cooling water is flushed down, thus supporting the insulating sheet 31. Finally, the insulating cylinder assembly 3 is supported, preventing it from moving up and down. The insulating cylinder assembly 3 provides insulation between the magnet coils in coil A 21 and coil B 22.

[0095] It should be noted that traditional insulating cylinders are integral, with multiple ridges evenly distributed on the inner and outer walls. Cooling water channels exist between adjacent ridges, and each ridge adheres to the circumferential sidewall of the coil, ensuring sufficient cooling water flow channels between the inner wall of the insulating cylinder and the internal coil, and between the outer wall and the outer coil. However, in this embodiment, coil A 21 and coil B 22 are electrically connected in series. Coil A 21 has no fixing rod and cannot be positioned or secured on its own. During the operation of the hybrid internal water-cooled magnet device, the coil is subjected to electromagnetic force, causing it to rotate circumferentially. Therefore, the coil must be positioned; otherwise, the rotation will cause misalignment and blockage of the cooling holes on the coil, resulting in the coil's heat not being carried away by the cooling water in time and causing it to burn out. Using a traditional insulating cylinder, it is impossible to position coil A 21.

[0096] In this embodiment, the protrusions on the inner wall of each insulating sheet 31 are correspondingly engaged in the first limiting groove 2122, the second limiting groove 21311, and the positioning groove 21511, so that the electromagnetic rotational force of the coil is transmitted to the A coil end plates 212 at both ends of the A magnet coil 211. The A coil end plates 212 transmit the force to the hydraulic press assembly 13 and the inner support assembly 15 through the upper electrode cylinder 213 and the lower electrode cylinder 215 of the A coil, respectively, thereby preventing the rotation of the A magnet coil 211 and realizing the control of the A magnet coil 211. The positioning of 11 simultaneously achieves insulation between the magnet coils in coil A 21 and coil B 22. Therefore, the insulating cylinder assembly 3 in this embodiment not only serves as insulation but also replaces the fixing rod to position the magnet coil A 211. Secondly, the removal of the fixing rod makes the slot of the bit plate on the magnet coil A 211 smaller than the fixing hole used to fix the fixing rod. The current density distribution of the bit plate is inversely proportional to the radius. The insulating sheet 31 is placed in the low current density area of ​​the bit plate, which improves the current carrying capacity and enhances the magnetic field strength.

[0097] In addition, considering that the assembly gap should be as small as possible, but considering the radial expansion force and deformation during the operation of the hybrid water-cooled magnet device and the actual engineering situation (the coil itself is made up of thousands of conductor sheets stacked together, and the inner and outer diameters deviate from the ideal value), the implementation space of the insulating cylinder is only 1.6mm. If the insulating cylinder assembly 3 in this embodiment is installed as an integral insulating cylinder, due to the small implementation space and the fact that the insulating cylinder also needs to play a positioning role, the positioning requires tight assembly. If the gap is too large, it will not play a positioning role, which will make the installation of the integral insulating cylinder extremely difficult, and it may even be impossible to fit the insulating cylinder into the outer wall of the A magnet coil 211. In this embodiment, a segmented insulating cylinder assembly 3 composed of multiple insulating sheets 31 is used. The insulating sheets 31 are fitted onto the outer wall of the A coil 21 one by one, which not only greatly reduces the installation difficulty, but also achieves a good tight assembly effect.

[0098] See also Figures 11 to 13The B coil 22 includes a B magnet coil 221, a B coil end plate 222, a B fixing rod 223, a B coil upper electrode cylinder 224, a second conductive flexible connector 225, and a B coil lower electrode cylinder 226. The B coil upper electrode cylinder 224 includes a first B coil upper electrode cylinder 2241 and a second B coil upper electrode cylinder 2242 connected together, and the B coil lower electrode cylinder 226 includes a first B coil lower electrode cylinder 2261 and a second B coil lower electrode cylinder 2262 connected together.

[0099] The B magnet coil 221 is fixed between the two sets of B coil end plates 222 by the B fixing rod 223. The end of the first B coil upper electrode cylinder 2241 away from the second B coil upper electrode cylinder 2242 is connected to the upper B coil end plate 222. The end of the second B coil upper electrode cylinder 2242 away from the first B coil upper electrode cylinder 2241 is electrically connected to the AB electrical connection plate 4 through the second conductive flexible connector 225. At the same time, the second B coil upper electrode cylinder 2242 is also electrically connected to the second A coil upper electrode cylinder 2132 through the upper locking nut 214 and the upper anti-loosening screw. The end of the second force transmission column 1312 away from the second force transmission stop ring 1307 passes through the AB electrical connection plate 4 and is insulatedly connected to the upper electrode cylinder 2242 of the second B coil through a hydraulic insulating sleeve. The end of the lower electrode cylinder 2261 of the first B coil away from the lower electrode cylinder 2262 of the second B coil is connected to the lower end plate 222 of the B coil. The end of the lower electrode cylinder 2262 of the second B coil away from the lower electrode cylinder 2261 of the first B coil is electrically connected to the C coil 23 through the BC electrical connection plate 5. The BC electrical connection plate 5 is insulatedly connected to the inner support assembly 15 through the insulating anti-rotation structure 9.

[0100] See Figure 19 The insulating anti-rotation structure 9 includes an anti-rotation insulating plate 91, an anti-rotation metal cylinder 92, an anti-rotation metal threaded pin 93, and an anti-rotation insulating sleeve 94. The anti-rotation insulating plate 91 is disposed between the anti-rotation metal cylinder 92 and the corresponding electrical connection plate. One end of the anti-rotation metal cylinder 92 away from the electrical connection plate is connected to the container assembly 1. The threaded section of the anti-rotation metal threaded pin 93 is threadedly connected to the corresponding electrical connection plate, and the other end is fitted with an anti-rotation insulating sleeve 94, which passes through the anti-rotation insulating plate 91 and is then inserted into the anti-rotation metal cylinder 92, resulting in an insulated connection between the anti-rotation metal threaded pin 93 and the anti-rotation metal cylinder 92. Specifically... Figure 20 Taking the connection between the insulating anti-rotation structure 9 and the BC electrical connection plate 5 as an example, the BC electrical connection plate 5 is connected to the B coil 22 and the C coil 23 respectively by screws. The anti-rotation insulating plate 91 and the anti-rotation metal cylinder 92 are sequentially arranged on the bottom surface of the BC electrical connection plate 5. The threaded section of the anti-rotation metal threaded pin 93 is threadedly connected to the BC electrical connection plate 5, and the other end is fitted with an anti-rotation insulating sleeve 94, which passes through the anti-rotation insulating plate 91 and is then inserted into the anti-rotation metal cylinder 92. The bottom surface of the anti-rotation metal cylinder 92 is fixedly connected to the stop insulating support plate 152. Furthermore, the anti-rotation metal cylinder 92 is provided with multiple cooling water channels.

[0101] It should be noted that existing anti-rotation mechanisms all employ cylindrical anti-rotation components. During actual operation, the water-cooled magnet generates a significant circumferential electromagnetic rotational force. Each coil transmits this force to the anti-rotation component structure via an electrical connection plate, and then the anti-rotation component structure further transmits the force to container assembly 1. Therefore, the anti-rotation component structure must withstand the circumferential electromagnetic rotational force to prevent coil rotation. Currently, for insulation purposes, the anti-rotation component structure is made of insulating composite material with multiple pin holes at both ends. One end of the anti-rotation component structure connects to the electrical connection plate via a pin inserted into the pin hole, and the other end connects to container assembly 1 via a pin inserted into the pin hole, thus transmitting the rotational force to container assembly 1. Additionally, for cooling, multiple through-holes are formed along the circumference of the cylindrical anti-rotation component structure. However, the presence of multiple pin holes and cooling holes significantly reduces the strength of the insulating composite material in the cylindrical anti-rotation component structure. Consequently, the water-cooled magnet cannot withstand the strong electromagnetic rotational force during operation, leading to damage to the electrical connection plate and coils. In this embodiment, both the anti-rotation metal cylinder 92 and the anti-rotation metal threaded pin 93 are made of metal. One end of the anti-rotation metal threaded pin 93 is insulated from the anti-rotation metal cylinder 92, and the other end passes through the anti-rotation insulating plate 91 and connects to the electrical connection plate, thus forming a rigid connection between the electrical connection plate and the anti-rotation metal cylinder 92. At the same time, the anti-rotation insulating plate 91, which is set between the anti-rotation metal cylinder 92 and the corresponding electrical connection plate, plays an insulating role. The circumferential electromagnetic rotational force generated by the water-cooled magnet during actual operation is transmitted to the anti-rotation metal threaded pin 93 through the electrical connection plate and then to the anti-rotation metal cylinder 92. The circumferential rotational force is then transmitted to the container assembly 1 through the anti-rotation metal cylinder 92. The transmission of the circumferential electromagnetic rotational force is a rigid connection. The anti-rotation metal cylinder 92 replaces the insulating anti-rotation component structure of the insulating composite material in the prior art. By leveraging the high strength of the metal itself, the anti-rotation metal cylinder 92 solves the problem of insufficient strength in the traditional structure, thereby preventing damage to the electrical connection plate and the coil.

[0102] Furthermore, multiple connection holes are provided on both the upper and lower end faces of the anti-rotation insulating plate 91, and the anti-rotation metal cylinder 92 and the corresponding electrical connection plate are connected by bolts.

[0103] Furthermore, multiple anti-spin lateral cooling channels 921 are provided on the circumferential side of the anti-spin metal cylinder 92, and a first anti-spin circumferential cooling channel 922 is provided on the end face of the anti-spin metal cylinder 92 near the anti-spin insulating plate 91 for the flow of cooling water.

[0104] Furthermore, the anti-spin insulation plate 91 is provided with a second anti-spin circumferential cooling channel 911 that communicates with the first anti-spin circumferential cooling channel 922.

[0105] See Figures 21 to 25Multiple B-coil cooling channels are provided on the B-coil end plate 222, the B-coil upper electrode cylinder 224, and the B-coil lower electrode cylinder 226. Specifically, multiple axial cooling channels 2221 are provided on the B-coil end plate 222, the first B-coil upper electrode cylinder 2241, and the first B-coil lower electrode cylinder 2261, while multiple lateral cooling channels 22421 are provided on the second B-coil upper electrode cylinder 2242 and the second B-coil lower electrode cylinder 2262.

[0106] Furthermore, the fixing rod 223 is fastened between the two B coil end plates 222 by an insulating pad, a disc-shaped washer, a metal washer, and a nut. The fixing rod 223 is made of a metal flat rod with an insulating layer cured by glass fiber and epoxy resin. The metal flat rod and the insulating layer have good integrity and stable insulation performance. The fixing rod 223 is threaded at both ends to lock the B magnet coil 221. The electrical insulation between the fixing rod 223 and the upper electrode cylinder 224 and the lower electrode cylinder 226 of the B coil is achieved by an insulating tube. The insulating tube is a heat shrink tube. The heat shrink tube is put on the outside of the fixing rod 223, the insulating pad, the disc-shaped washer, the metal washer, and the nut. The heat shrink tube is heated by a heating tool, and the heat shrink tube shrinks and tightens, which can save space, improve the cooling water channel, and meet the electrical insulation requirements.

[0107] The B coil end plate 222 is provided with multiple evenly distributed fixing rod holes and circumferential grooves; the first B coil upper electrode cylinder 2241 is provided with multiple cooling grooves and fixing rod holes, and adopts a flared structure to increase the cooling water channel; the first B coil upper electrode cylinder 2241 is provided with multiple threaded holes at the small end for connecting the second B coil upper electrode cylinder 2242; the first B coil lower electrode cylinder 2261, in addition to the same arrangement as the first B coil upper electrode cylinder 2241, is provided with multiple first insulating cylinder support platforms 22611 for supporting the insulating cylinders between the B coil 22 and the C coil 23, and cooling water channels between adjacent first insulating cylinder support platforms 22611; the second B coil upper electrode cylinder 2242 is provided with multiple light holes, force transmission holes, and threaded holes. The multiple light holes are fastened to the first B coil upper electrode cylinder 2241 by countersunk screws, and the multiple threaded holes are used to connect the second conductive flexible connector 225 to realize A The electrical connection between coil 21 and coil B 22 includes multiple force transmission holes for inserting a hydraulic insulating sleeve, enabling the hydraulic pressure of the hydraulic press assembly 13 to be applied to coil B 22 and achieving insulation between coil B 22 and the hydraulic press assembly 13. The upper electrode cylinder 2242 of the second coil B is provided with upper locking nut threads and upper anti-loosening screw threads, which are respectively used to install upper locking nut 214 and upper anti-loosening screw for upper locking of coil A 21 and electrical connection of coil A 21. Compared with the upper electrode cylinder 2242 of the second coil B, the lower electrode cylinder 2262 of the second coil B is also provided with lower locking nut threads and lower anti-loosening nut threads, which are respectively used to install lower locking nut 217, lower anti-loosening nut and insulating collar 216 for lower locking of coil A 21 and electrical insulation of coil A 21. The lower electrode cylinder 2262 of the second coil B is provided with threaded holes for connecting coil B to BC connecting plate 5, achieving electrical connection between coil B 22 and coil C 23.

[0108] In this embodiment, the second conductive flexible connector 225 is composed of multiple overlapping copper sheets with a thickness on the order of micrometers. The holes at both ends are pressed together to form a single structure. When the hybrid internal water-cooled magnet device is running, the hydraulic press assembly 13 applies pressure to coils A 21 and B 22, causing changes in coil height. The flexible connector is stretchable and compressible, ensuring a stable electrical connection between coils A 21 and B 22. Therefore, the electrical connection between coils A 21 and B 22 employs a two-way parallel technology: the first conductive path is connected via the upper locking nut 214 and the upper anti-loosening screw, while the second path is connected via the second conductive flexible connector 225. This enables a larger current to be transmitted stably within a compact space. Furthermore, during the operation of the hybrid internal water-cooled magnet device, when coils A 21 and B 22 experience differences in compression under the influence of electromagnetic force and hydraulic pressure from the hydraulic press assembly 13, the second conductive flexible connector 225 ensures a stable electrical connection even with varying compression levels.

[0109] In addition, in this embodiment, the disc-shaped pad is composed of multiple disc springs, and the coil fastening can provide a large preload for coil B 22, so that the electrical connection of each part of the coil can still be guaranteed when the hybrid internal water-cooled magnet device is running.

[0110] See Figures 26 to 29 The C coil 23 includes a C magnet coil 231, a C coil end plate 232, a C fixing rod 233, an upper electrode cylinder 234, and a lower electrode cylinder 235.

[0111] C magnet coil 231 is fixed between two sets of C coil end plates 232 by C fixing rod 233. One end of C coil upper electrode cylinder 234 is connected to the upper C coil end plate 232, and the other end is electrically connected to D coil 24 through CD electrical connection plate 6. One end of C coil lower electrode cylinder 235 is connected to the lower C coil end plate 232, and the other end is electrically connected to BC electrical connection plate 5. CD electrical connection plate 6 is insulatedly connected to container end cap 12 through insulating anti-rotation structure 9. Specifically, CD electrical connection plate 6 is connected to C coil 23 and D coil 24 respectively by screws. Anti-rotation insulating plate 91 and anti-rotation metal cylinder 92 are arranged sequentially from bottom to top on the top surface of CD electrical connection plate 6. The threaded section of anti-rotation metal threaded pin 93 is threadedly connected to CD electrical connection plate 6, and the other end is fitted with anti-rotation insulating sleeve 94, which passes through anti-rotation insulating plate 91 and is then inserted into anti-rotation metal cylinder 92.

[0112] Multiple C-coil cooling channels are provided on the C-coil end plate 232, the C-coil upper electrode cylinder 234, and the C-coil lower electrode cylinder 235. Among them, multiple C-coil axial cooling channels 2321 are provided on the C-coil end plate 232, and multiple C-coil lateral cooling channels 2341 are provided on the C-coil upper electrode cylinder 234 and the C-coil lower electrode cylinder 235.

[0113] The C-coil end plate 232 is provided with threaded holes, and the upper C electrode cylinder 234 and the lower C electrode cylinder 235 are fixedly connected by screws. Multiple anti-rotation grooves 2322 are provided on the outer circumference of the C-coil end plate 232. Multiple bosses 2342 that mate with the anti-rotation grooves 2322 are provided at the ends of the upper C electrode cylinder 234 and the lower C electrode cylinder 235 where they connect to the C-coil end plate 232, ensuring the connection between the C-coil end plate 232 and the upper C electrode cylinder 234 and the lower C electrode cylinder 235. Multiple fixing rod recess holes are provided on the upper C electrode cylinder 234 and the lower C electrode cylinder 235. By recessing the end portion of the C fixing rod 233 into the upper C electrode cylinder 234 and the lower C electrode cylinder 235, the C-coil... Multiple second insulating cylinder support platforms 2351 are provided on the outer circumference of the lower electrode cylinder 235 to support the insulating cylinder between the C coil 23 and the D coil 24; a water flow groove 2352 is formed between adjacent second insulating cylinder support platforms 2351 to draw out cooling water between the inner wall of the insulating cylinder between the C coil 23 and the D coil 24 and the outer wall of the C magnet coil 231; the C fixing rod 233 has the same structure as the B fixing rod 223 mentioned above, and is made of a metal flat rod with an insulating layer cured by glass fiber and epoxy resin. The metal flat rod and the insulating layer have good integrity and stable insulation performance. The C fixing rod 233 is threaded at both ends, and the C magnet coil 231 is locked in sequence by an insulating pad, a disc-shaped pad, a metal pad and a nut.

[0114] In this embodiment, the structure of coil D 24 is identical to that of coil C 23. Coil D includes a magnetic coil, a coil end plate, a fixing rod, an upper electrode cylinder, and a lower electrode cylinder. The magnetic coil is fixed between the two sets of coil end plates via the fixing rod. One end of the upper electrode cylinder is connected to the upper coil end plate, and the other end is electrically connected to the CD electrical connection plate 6. One end of the lower electrode cylinder is connected to the lower coil end plate, and the other end is electrically connected to coil E 25 via the DE electrical connection plate 7. The insulating anti-rotation structure 9 is connected to the inner support assembly 15. Specifically, the DE electrical connection plate 7 is connected to the D coil 24 and the E coil 25 respectively by screws. The anti-rotation insulating plate 91 and the anti-rotation metal cylinder 92 are arranged from top to bottom on the bottom surface of the DE electrical connection plate 7. The threaded section of the anti-rotation metal threaded pin 93 is threadedly connected to the DE electrical connection plate 7. The other end is fitted with an anti-rotation insulating sleeve 94, which passes through the anti-rotation insulating plate 91 and is then inserted into the anti-rotation metal cylinder 92. The bottom of the anti-rotation metal cylinder 92 is fixedly connected to the stop insulating support plate 152.

[0115] Multiple cooling channels for the D coil are provided on the D coil end plate, the upper electrode cylinder of the D coil, and the lower electrode cylinder of the D coil. The two ends of the D fixing rod are threaded, and the D magnet coil is locked in sequence by an insulating pad, a disc-shaped pad, a metal pad, and a nut.

[0116] See Figure 30 and Figure 31The E coil 25 includes an E magnet coil 251, an E coil end plate 252, an E fixing rod 253, and an EF electric connecting tube 254.

[0117] The E magnet coil 251 is fixed between two sets of E coil end plates 252 by the E fixing rod 253. One end of the EF electric connecting tube 254 is electrically connected to the upper E coil end plate 252, and the other end is electrically connected to the F coil 26 through the EF electric connecting plate 8. The lower end of the E magnet coil 251 is electrically connected to the inner support assembly 15 through the anti-insulation tube. The EF electric connecting plate 8 is connected to the container end cap 12 through the anti-rotation structure 9. Specifically, the EF electric connecting plate 8 is electrically connected to the E coil 25 and the F coil 26 by screws. The anti-rotation insulation plate 91 and the anti-rotation metal tube 92 are arranged from bottom to top on the top surface of the EF electric connecting plate 8. The threaded section of the anti-rotation metal threaded pin 93 is threadedly connected to the EF electric connecting plate 8, and the other end is fitted with an anti-rotation insulation sleeve 94, which passes through the anti-rotation insulation plate 91 and is then inserted into the anti-rotation metal tube 92.

[0118] The E coil end plate 252 is provided with multiple E coil axial cooling channels 2521, and the E fixing rod 253 is threaded at both ends, and the E magnet coil 251 is locked in sequence by an insulating pad, a disc-shaped pad, a metal pad and a nut.

[0119] See Figure 32 and Figure 33 The F coil 26 includes an F magnet coil 261, an F coil end plate 262, an F fixing rod 263, an F transition electrical connection ring 264, an F lower insulating support anti-rotation cylinder 265, and a reinforcing rod 266.

[0120] The F magnet coil 261 is fixed between two sets of F coil end plates 262 by the F fixing rod 263. The upper F coil end plate 262 is electrically connected to the EF electrical connection plate 8, and the lower F coil end plate 262 is electrically connected to the electrical connection lead 155 through the F transition electrical connection ring 264. The lower F coil end plate 262 is fixedly connected to the second end ring 115 on the upper cylinder assembly through the F lower insulating support anti-rotation cylinder 265.

[0121] The F peripheral fastening rod 264 is made of a metal circular cross-section rod with an insulating layer cured by glass fiber and epoxy resin. It is used to insulate the F peripheral fastening rod 264 from the F magnet coil 261 and the F coil end plate 262. The insulating layer has thickened layers at both ends to provide positioning for installation with the F coil end plate 262. The F peripheral fastening rod 264 has threads at both ends, and the F magnet coil 261, F coil end plate 262, F insulating washer, and F adjusting washer are locked and fixed by the F peripheral nut. Together with the F fixing rod 263, it locks and fixes the F magnet coil 261 and F coil end plate 262.

[0122] The F coil end plate 262 is provided with multiple F coil axial cooling channels 2621, and the F fixing rod 263 is threaded at both ends, and the F magnet coil 261 is locked in sequence by an insulating pad, a disc-shaped pad, a metal pad and a nut.

[0123] See Figure 34 The F coil end plates 262 at both ends are also connected to the ends of the F magnet coil 261 near the F coil end plates 262 via reinforcing rods 266. Specifically, the end faces of the F coil end plates 262 and the F magnet coil 261 opposite each other are provided with two evenly distributed special holes 2611 for installing the reinforcing rods 266, but not limited to two turns. The specific number of turns depends on the actual needs. The fixing rods 266 are used to strengthen the connection between the bit plates and insulating plates at both ends of the F magnet coil 261 and the F coil end plates 262, which greatly improves the anti-expansion and limiting ability of the bit plates and insulating plates at both ends of the F magnet coil 261, strengthens both ends of the F magnet coil 261, and enhances the stability of both ends of the F magnet coil 261.

[0124] It should be noted that during operation of the hybrid internal water-cooled magnet device, both ends of the outermost F coil 26 are subjected to pressure from high-pressure cooling water and axial electromagnetic force along their axial direction. The axial electromagnetic force at both ends gradually presses towards the center plane of the F coil 26. When the axial electromagnetic force accumulates to its maximum value at the center plane, the F magnet coil 261 contracts, reducing the clamping force of the fixing rod 263. This results in a decrease in the axial pressure on the bit pieces on the F magnet coil 261 near the end plates 262 of the F coil at both ends. Under the strong background magnetic field of the external superconducting magnet, the fixing rod 263 cannot resist the circumferential electromagnetic force (external expansion force), causing the bit pieces to shift and misalign, and the cooling water holes to become blocked. In this embodiment, by setting a reinforcing rod 266, the two ends of the F magnet coil 261 are strengthened, enhancing the stability of the two ends of the F magnet coil 261 and solving the problem of movement and misalignment near the end plates (i.e., the end bit pieces and insulating sheets) during the operation of the F coil 26. In addition, the outermost coil has a large radial cross-sectional area, passes through many magnetic lines of force, and has a large external electromagnetic force. Therefore, in this embodiment, the outermost F coil 26 is subjected to the largest external electromagnetic force. Thus, the reinforcing rod 266 is set on the outermost F coil 26 of the hybrid internal water-cooled magnet device.

[0125] See Figure 35The F-transition electrical connection ring 264 has a notch 2641 along its axial direction, making it a non-closed ring. It should be noted that existing F-transition electrical connection ring structures are all closed-loop structures. However, in the event of a sudden power outage during operation of the hybrid internal water-cooled magnet device, a large instantaneous induced current will be generated, exerting an outward expanding force on the closed F-transition electrical connection ring structure, easily causing damage. In this embodiment, the F-transition electrical connection ring 264 has a notch 2641 along its axial direction, making it a non-closed ring. Therefore, in the event of a sudden power outage during operation of the hybrid internal water-cooled magnet device, the instantaneous current will not flow into the non-closed F-transition electrical connection ring 2641, thus preventing damage to the F-transition electrical connection ring 2641 in the event of a sudden power outage.

[0126] Furthermore, the F transition electrical connection ring 264 is also provided with a stepped cross-section 2642 to facilitate electrical connection with the electrical connection lead-out 155.

[0127] In this embodiment, the current is introduced into the corresponding first conductive flexible connector 19 by a set of electrical connection components 18, and then flows into coil A 21 through electrical connection introduction component 154 and first electrical connector 27 in sequence. Coil A 21 receives the current through upper locking nut 214, upper anti-loosening screw, AB electrical connection plate 4, and second conductive flexible connector 225, and then flows to the lower end of coil B 23. It then flows to the lower end of coil C 23 through BC electrical connection plate 5, and the current flows from the lower end of coil C 23 to its upper end; and through CD electrical connection... The current flows from the upper end of coil D 24 to its lower end via the connecting plate 6; and from the lower end of coil E 25 to its upper end via the connecting plate 7; and from the lower end of coil E 25 to its upper end via the connecting plate 8; and from the upper end of coil F 26 to its lower end via the connecting plate 8; and from the upper end of coil F 26 to its lower end via the connecting ring 265; and from the first conductive flexible connector 19 to another set of electrical connection components 18; and finally the current is led out of the hybrid internal water-cooled magnet device.

[0128] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0129] The above embodiments are merely illustrative of implementation methods of the invention. The scope of protection of the present invention is not limited to the above embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A novel water-cooled magnet container assembly for a high-mechanical-stability hybrid magnet, characterized in that: The assembly includes an upper cylinder assembly, a container end cap, a hydraulic press assembly, a central tube assembly, an inner support assembly, a middle cylinder assembly, a lower cylinder assembly, and an electrical connection assembly. The container end cap is located on top of the upper cylinder assembly. The inner ring of the container end cap is connected to the outer ring of the hydraulic press assembly. The inner ring of the hydraulic press assembly is connected to the top of the central tube assembly. The top of the upper cylinder assembly is connected to the lower cylinder assembly through the middle cylinder assembly. The inner support assembly is located inside the upper cylinder assembly to support the magnet coil assembly located inside the upper cylinder assembly. The bottom of the central tube assembly is connected to the inner support assembly. Two electrical connection assemblies pass through the middle cylinder assembly and are electrically connected to the inner support assembly through a first conductive flexible connector. An installation window is provided on the middle cylinder assembly near the first conductive flexible connector. The hydraulic press assembly includes a cylinder body, piston, stop ring, pressure equalizing pad, limit block, first force transmission stop ring, first anti-rotation pin, second force transmission stop ring, second anti-rotation pin, first force transmission column, and second force transmission column. The upper inner ring of the cylinder body is externally sealed to the top of the central tube assembly, and the upper outer ring of the cylinder body is connected to the inner ring of the container end cap. A piston and limit block are installed inside the cylinder body. A stop ring and pressure equalizing pad are installed at the bottom of the cylinder body. A first force transmission stop ring and a second force transmission stop ring are installed at the bottom of the pressure equalizing pad. The first force transmission stop ring is connected to the cylinder body via a first anti-rotation pin. The force-stopping ring is connected to the stop ring via the second anti-rotation pin. Multiple first force-transmitting columns are connected to the first force-transmitting stop ring, and multiple second force-transmitting columns are connected to the second force-transmitting stop ring. The first force-transmitting columns are insulated from the innermost coil in the magnet coil assembly, and the second force-transmitting columns are insulated from the coils adjacent to the innermost coil. This pushes the piston downward, transmitting the hydraulic pressure to the pressure equalizing pad, which in turn transmits it to the first force-transmitting stop ring, the second force-transmitting stop ring, the first force-transmitting column, and the second force-transmitting column, thereby applying the hydraulic pressure to the two innermost coils of the magnet coil assembly.

2. A novel high-mechanical-stability hybrid magnet internal water-cooled magnet container assembly according to claim 1, characterized in that: The cylinder body is evenly distributed with first anti-rotation pin grooves, and the first force transmission stop ring is provided with a first countersunk bolt connection hole in the circumferential direction. One end of the first anti-rotation pin is engaged in the first anti-rotation pin groove, and the other end is threadedly connected to the first countersunk bolt connection hole.

3. A novel high-mechanical-stability hybrid magnet internal water-cooled magnet container assembly according to claim 1, characterized in that: The stop ring is evenly distributed with second anti-rotation pin grooves. The second force transmission stop ring is provided with a second countersunk bolt connection hole in the circumferential direction. One end of the second anti-rotation pin is engaged in the second anti-rotation pin groove, and the other end is threadedly connected to the second countersunk bolt connection hole.

4. A novel high-mechanical-stability hybrid magnet internal water-cooled magnet container assembly according to claim 1, characterized in that: The top of the second force transmission column is fitted with a first insulating sleeve, the bottom of the first force transmission column is fitted with a second insulating sleeve, and the bottom of the second force transmission column is fitted with a third insulating sleeve.

5. A novel high-mechanical-stability hybrid magnet internal water-cooled magnet container assembly according to claim 1, characterized in that: The upper cylinder assembly includes an upper outer cylinder, an upper inner cylinder, a filter screen, a first end ring, a second end ring, a third end ring, and a main support plate; The upper outer cylinder and the upper inner cylinder are arranged at intervals to form a double-layer structure with a first high-pressure water inlet chamber. The top of the upper inner cylinder has a waist-shaped hole, which connects the first high-pressure water inlet chamber with the inner cavity of the upper inner cylinder. A filter screen is installed on the waist-shaped hole. An insulating layer is cured on the inner wall of the upper inner cylinder. The top of the double-layer structure is sealed and connected to the container end cap through a first end ring. A second end ring is provided on the inner wall of the middle part of the upper inner cylinder for fixing the outermost coil of the magnet coil assembly. The bottom of the double-layer structure is connected to the middle cylinder assembly through a third end ring. The third end ring is provided with an upper cylinder cooling water channel that communicates with the first high-pressure water inlet chamber. The main support plate for fixing the inner support assembly is connected to the center of the third end ring. Multiple fan-shaped through holes are arranged in a circumferential array on the main support plate.

6. A novel high-mechanical-stability hybrid magnet internal water-cooled magnet container assembly according to claim 5, characterized in that: The middle cylinder assembly includes an outer middle cylinder, an inner middle cylinder, an upper middle cylinder ring, a middle middle cylinder ring, a high-pressure water inlet pipe, a low-pressure water outlet pipe, a lower middle cylinder ring, and a lower middle cylinder cover. The outer cylinder and the inner cylinder are arranged at intervals to form a double-layer structure with a second high-pressure water inlet chamber. The top of the double-layer structure is sealed by the upper end ring of the middle cylinder and connected to the third end ring. The upper end ring of the middle cylinder is provided with a cooling water channel for the middle cylinder that communicates with the cooling water channel of the upper cylinder. The bottom of the double-layer structure is sealed by the middle end ring of the middle cylinder. The outer cylinder is provided with a high-pressure water inlet pipe, and the inner cylinder is provided with a low-pressure water outlet pipe. The inner cylinder is connected to the lower cylinder assembly through the lower end ring of the middle cylinder. The lower cover of the middle cylinder is sealed to the lower end ring of the middle cylinder to seal the inner cylinder. The electrical connection assembly passes through the outer cylinder and the inner cylinder in sequence and is electrically connected to the inner support assembly through the first conductive flexible connector.

7. A novel high-mechanical-stability hybrid magnet internal water-cooled magnet container assembly according to claim 6, characterized in that: The inner support assembly includes an inner support frame, a stop-insulating support plate, an anti-rotation stop-insulating frame, an electrical connection inlet, and an electrical connection outlet. The inner support frame has an I-shaped cross-section. The bottom of the inner support frame is fixed to the main support plate, and the top of the inner support frame is fixed with a stop-insulating support plate to support the magnet coil assembly. Multiple anti-rotation stop-insulating frames are spaced apart on the inner support frame along its height. One end of the electrical connection inlet is electrically connected to a set of first conductive flexible connectors, and the other end is electrically connected to the innermost coil of the magnet coil assembly. One end of the electrical connection outlet is electrically connected to another set of first conductive flexible connectors, and the other end is electrically connected to the outermost coil of the magnet coil assembly. Both the electrical connection inlet and the electrical connection outlet are connected to the anti-rotation stop-insulating frame. The inner support frame, the stop-insulating support plate, and the anti-rotation stop-insulating frame all have through-holes for cooling water.

8. A novel high-mechanical-stability hybrid magnet internal water-cooled magnet container assembly according to claim 6, characterized in that: The electrical connection assembly includes an electrode connector, electrodes, an insulating positioning plate, an insulating ring, and an insulating sealing plate; The electrode connector passes through the outer cylinder and the inner cylinder of the middle cylinder and is fixed on the outer cylinder and the inner cylinder of the middle cylinder. An insulating ring is provided on the inner wall of the electrode connector. The electrode is fixed on the electrode connector by an insulating positioning plate and an insulating sealing plate and is electrically connected to the first conductive flexible connector after passing through the electrode connector.

9. A novel high-mechanical-stability hybrid magnet internal water-cooled magnet container assembly according to claim 6, characterized in that: The central tube assembly includes a central tube, an upper pressure ring, and a metal end cap. The central tube passes through the magnet coil assembly and the cylinder body. The central tube is insulated from the innermost coil. The upper inner ring of the cylinder body is sealed to the top of the central tube via the upper pressure ring. The bottom of the central tube is sealed to the inner support assembly via the metal end cap.

10. A novel high-mechanical-stability hybrid magnet internal water-cooled magnet container assembly according to claim 1, characterized in that: The lower cylinder assembly is a metal cylinder, with the top of the metal cylinder connected to the lower end ring of the middle cylinder, and an installation inlet is provided on the side wall of the metal cylinder.

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