CN220381919U - Mixed magnet internal water-cooled magnet assembly fixture - Google Patents

Abstract

The utility model discloses a water-cooled magnet assembly fixture in a mixed magnet, which relates to the field of magnet coil assembly and comprises an A coil positioning fixture, a B coil positioning fixture, an A coil compaction fastening fixture and an AB coil fastening fixture; the water-cooled magnet is provided with an A coil and a B coil, wherein the A coil is arranged in the B coil to form an AB coil; the A coil positioning clamp can position an A coil, the B coil positioning clamp can position a B coil, the A coil pressing and fastening clamp can be matched with a press to press and fasten the A coil, and the AB coil fastening clamp can be matched with the press to fasten the AB coil. The utility model has the advantages that: the fixture is used for positioning the assembly process of the coil A and the coil B of the water-cooled magnet in the mixed magnet, the coil A is tightly pressed and fastened by the matched press, the coil AB is tightly fastened by the matched press, and the high-precision assembly requirement of the water-cooled magnet coil is met.

Description

Hybrid magnet internal water-cooled magnet assembly fixture

Technical field

The utility model relates to the field of magnet coil assembly, and in particular to a water-cooled magnet assembly fixture in a hybrid magnet.

Background technique

The steady-state strong magnetic field is an extreme experimental condition required for material scientific research and a powerful tool to promote major scientific discoveries. In a strong magnetic field experimental environment, material properties will be regulated, which is conducive to scientists discovering new phenomena of matter and exploring new laws of matter. Hybrid magnets are magnets capable of producing the highest stable magnetic field and are composed of an outer superconducting magnet and an inner water-cooled magnet. Currently, there are no fixtures available for the coil assembly of water-cooled magnets in hybrid magnets. The coils cannot be positioned, tightened, and compressed during assembly, making it difficult to meet the high-precision assembly requirements for water-cooled magnet coils.

Utility model content

The technical problem to be solved by the utility model is how to meet the high-precision assembly requirements of the water-cooled magnet coil.

The utility model solves the above technical problems through the following technical means: a water-cooled magnet assembly fixture in a hybrid magnet, including an A coil positioning fixture, a B coil positioning fixture, an A coil pressing and tightening fixture, and an AB coil tightening fixture; water-cooled magnets It has an A coil and a B coil, and the A coil is arranged inside the B coil to form an AB coil; the A coil positioning fixture can position the A coil, the B coil positioning fixture can position the B coil, and the A coil presses the tightening fixture The A coil can be pressed and tightened in cooperation with the press, and the AB coil fastening fixture can be fastened in conjunction with the press.

Preferably, the A coil pressing fastening fixture includes a fastening rod, a lower fastening nut and an upper fastening nut. The upper fastening nut and the lower fastening nut are threadedly connected to the upper and lower sides of the fastening rod respectively. end.

Preferably, the A coil pressing and tightening fixture also includes a balance plate, a support connecting column, a pressure plate and a support block, the balance plate is arranged below the tightening rod and is fixedly connected to the lower tightening nut, The support connection column is sleeved on the outside of the fastening rod, the pressure plate is fixedly connected on the outside of the connection column, and the support block is placed on the top of the pressure plate.

Preferably, the A coil pressing fastening fixture further includes a wrench joint, the wrench joint is arranged above the tightening rod and is fixedly connected to the upper tightening nut, and the top of the wrench joint is provided with a capable A structure that cooperates with a wrench; there are two support blocks, and the two support blocks are symmetrically placed on both sides of the top of the pressure plate.

Preferably, the outer surface of the fastening rod is wrapped with an insulating layer, an insulating pad is provided between the support connecting column and the upper fastening nut, and an annular insulating pad is placed on the outside of the fastening rod.

Preferably, the A coil positioning fixture includes a support plate, a support leg, an A coil base, an A coil central cylinder and an A coil positioning rod; the support legs are fixedly connected to the bottom of the support plate, and the A coil base is fixed Connected to the top of the support plate, the A coil central tube is arranged above the A coil base; a plurality of A coil positioning rods surround the outside of the A coil central cylinder, and the A coil positioning rods pass through The A coil base and the support plate.

Preferably, the A coil positioning fixture also includes an A coil bottom fixture and a support rod. The A coil bottom fixture is arranged in the groove on the top of the A coil base, and the A coil center tube passes through the A coil. Bottom clamp, the support rod passes through the support plate and the A coil base and is supported at the bottom of the A coil center tube.

Preferably, the B coil positioning fixture includes a B coil base, a B coil central cylinder and a B coil positioning rod. The B coil center cylinder is arranged above the B coil base, and a plurality of B coil positioning rods surround the B coil positioning rod. B The outside of the coil base.

Preferably, the upper section of the B coil base protrudes at the top middle position of the lower section.

The advantage of this utility model is that it uses a clamp to position the A coil and B coil of the water-cooled magnet in the hybrid magnet during the assembly process, cooperates with the press to press and tighten the A coil, and cooperates with the press to tighten the AB coil, which satisfies the needs of the water-cooled magnet coil. High-precision assembly requirements required.

Description of the drawings

Figure 1 is a schematic cross-sectional view of a coil according to Embodiment A of the present invention.

Figure 2 is a schematic cross-sectional view of the coil of Embodiment B of the present invention.

Figure 3 is a schematic isometric view of the AB coil according to the embodiment of the present invention.

Figure 4 is a schematic isometric view of the lower connecting ring and the upper connecting ring provided on the A coil according to the embodiment of the present invention.

Figure 5 is a schematic cross-sectional view of the process of assembling the A coil using the A coil positioning clamp according to the embodiment of the present invention.

Figure 6 is a schematic cross-sectional view of the process of assembling the B coil using the B coil positioning fixture according to the embodiment of the present invention.

Figure 7 is a schematic diagram of the shaft side of the A coil being tightened using the A coil pressing and fastening clamp according to the embodiment of the present invention.

Figure 8 is a schematic cross-sectional view of the state in which the A coil is tightened using the A coil pressing and fastening clamp according to the embodiment of the present invention.

Figure 9 is a schematic diagram of the shaft side of the AB coil being tightened using the AB coil tightening clamp according to the embodiment of the present invention.

Figure 10 is a schematic cross-sectional view of the AB coil tightened using the AB coil tightening clamp according to the embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are Some embodiments of the present invention are provided, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

As shown in Figures 1 to 5, the water-cooled magnet has an A coil 1 and a B coil 2. The A coil 1 is arranged inside the B coil 2 and the upper and lower ends are fixed to the B coil 2 through the upper connecting ring 4 and the lower connecting ring 3 respectively. Connect to form AB coil.

As shown in Figure 1, A coil 1 includes two sections of A coil lower electrode barrel 11, one section of A coil lower electrode barrel 12, A coil lower end plate 13, A coil main body 14, and A coil upper end plate 15 arranged sequentially from bottom to top. , A coil upper electrode barrel section 16, A coil upper electrode barrel section 17, the outer side of A coil 1 is provided with 16 electrode barrel sections 12 at equal intervals along the circumferential direction passing through the A coil lower electrode barrel, A coil lower end plate 13, A coil The main body 14, the upper end plate 15 of the A coil and the strip grooves of the upper electrode barrel section 16 of the A coil. Insulating strips 18 are respectively stuck in each strip slot. The A coil body 14 is provided with an insulating strip at a certain distance to cover all the strips. 18. The overall outer rubber band 19.

As shown in Figure 2, the B coil 2 includes a second section 21 of the B coil lower electrode barrel, a section 22 of the B coil lower electrode barrel, a B coil lower end plate 23, a B coil main body 24, and a B coil upper end plate 25 arranged sequentially from bottom to top. , B coil upper electrode barrel section 26, B coil upper electrode barrel second section 27, B coil 2 is provided with 32 electrode barrel sections 22 at equal intervals along the circumferential direction, penetrating the B coil lower electrode barrel section 22, B coil lower end plate 23, B coil main body 24 , the positioning holes of the upper end plate 25 of the B coil and the section 26 of the upper electrode barrel of the B coil. A fixing rod 28 is passed through each positioning hole. The upper and lower ends of the fixing rod 28 are threadedly connected with nuts. The upper nut is connected to the upper electrode cylinder of the B coil. Insulators 29 are provided between the sections 26 and between the lower nut and the section 22 of the lower electrode barrel of the B coil.

As shown in Figures 3 and 4, the lower connecting ring 3 is placed on the outside of the lower section of the second section 11 of the lower electrode barrel of the A coil and the bottom contacts the middle annular convex portion of the second section 11 of the lower electrode barrel of the A coil. The lower connecting ring 3 is connected to The second section 21 of the lower electrode barrel of the B coil is threadedly connected; the upper connecting ring 4 is placed on the outside of the upper section of the second section 17 of the upper electrode barrel of the A coil and the bottom contacts the middle annular raised portion of the second section 17 of the upper electrode barrel of the A coil. The upper connecting ring 4 4 is threadedly connected to the second section 27 of the electrode barrel on the B coil.

As shown in Figures 5 to 9, the embodiment of the present invention discloses a water-cooled magnet assembly fixture in a hybrid magnet, which includes an A coil positioning fixture 5, a B coil positioning fixture 6, an A coil tightening clamp 7, and an AB coil fixing fixture. Tight clamp 8.

As shown in FIG. 5 , the A coil positioning fixture 5 includes a support plate 51 , support legs 52 , A coil base 53 , A coil bottom clamp 54 , A coil center tube 55 , support rod 56 , and A coil positioning rod 57 .

The support plate 51 is a circular plate with a round hole in the center. The three cylindrical support legs 52 are respectively connected to the bottom of the support plate 51 by bolts; the cylindrical A coil base 53 is connected to the bottom of the support plate 51 by bolts. At the top, the A coil bottom clamp 54 with a round hole in the center is set in the groove on the top of the A coil base 53, and the A coil bottom clamp 54, the A coil base 53 and the support plate 51 are centrally aligned.

The A coil central tube 55 is arranged above the A coil base 53 and passes through the A coil bottom clamp 54. The cylindrical support rod 56 passes through the support plate 51 and the A coil base 53 and is supported at the bottom of the A coil central tube 55. The coil center tube 55 can cooperate with the center holes of the A coil lower end plate 13 , the A coil main body 14 and the A coil upper end plate 15 .

16 A coil positioning rods 57 are equally spaced around the outside of the A coil central tube 55. The A coil positioning rods 57 pass through the A coil base 53 and the support plate 51. The A coil positioning rods 57 can be connected with the strips on the outer surface of the A coil 1. Shape groove fit.

As shown in FIG. 6 , the B coil positioning fixture 6 includes a B coil base 61 , a B coil central cylinder 62 , and a B coil positioning rod 63 .

The lower section of the B coil base 61 is a cylinder, and the upper section of the B coil base 61 is a cylinder protruding at the middle position of the top of the lower section. The upper section of the B coil base 61 can cooperate with the center hole of the B coil lower end plate 23 .

The B coil central tube 62 is disposed above the B coil base 61 . The B coil central tube 62 can cooperate with the center holes of the B coil lower end plate 23 , the B coil main body 24 and the B coil upper end plate 25 .

Thirty-two B coil positioning rods 63 are equally spaced around the outside of the B coil base 61 , and the B coil positioning rods 63 can cooperate with the positioning holes on the B coil 2 .

As shown in Figures 7 and 8, the A coil compression fastening fixture 7 includes a fastening rod 71, a lower fastening nut 72, an upper fastening nut 73, a wrench joint 74, a balance plate 75, a support connecting column 76, and an insulating pad. 77. Pressing plate 78, support block 79.

The outer surface of the tightening rod 71 is wrapped with an insulating layer. The tightening rod 71 passes through the central hole of the A coil 1. The upper tightening nut 73 and the lower tightening nut 72 are threadedly connected to the upper and lower ends of the tightening rod 71 respectively.

The wrench joint 74 is arranged above the fastening rod 71 and is fixedly connected to the upper fastening nut 73 through bolts. The top of the wrench joint 74 is provided with a hexagonal cylinder structure that can cooperate with the wrench.

The balance plate 75 is arranged below the tightening rod 71 and is fixedly connected to the lower tightening nut 72 through bolts; the support connecting column 76 is arranged between the second section 17 of the upper electrode barrel of the A coil and the upper tightening nut 73 and is sleeved on the tightening nut 72. The outside of the rod 71; an insulating pad 77 is provided between the supporting connecting column 76 and the upper fastening nut 73, and the annular insulating pad 77 is placed on the outside of the fastening rod 71; the cylindrical pressure plate 78 is threadedly connected to the supporting connecting column 76 Externally, there are two support blocks 79, and the two arc-shaped cylinder support blocks 79 are symmetrically placed on both sides of the top of the pressure plate 78.

As shown in Figures 9 and 10, the AB coil fastening fixture 8 includes a fastening ring 81 and a cross bar 82; the end surface of the fastening ring 81 is provided with four pin holes at equal intervals around the central hole, and the lower connecting ring 3 and the upper connecting ring 81 are provided with four pin holes at equal intervals around the central hole. The corresponding positions on the ring 4 are also provided with pin holes; the two cross bars 82 are threadedly connected to the opposite ends of the outer surface of the fastening ring 81 respectively.

A method for assembling a water-cooled magnet in a hybrid magnet, using the water-cooled magnet assembly fixture in a hybrid magnet, includes the following steps:

Step 1, A coil assembly and parameter measurement, includes the following steps:

1.1. Assemble A coil 1 and use A coil positioning fixture 5 to position A coil 1, including the following steps:

1.1.1. Assemble the A coil positioning fixture 5. In the initial state, each A coil positioning rod 57 is at the lowest position.

1.1.2. Place the A coil lower end plate 13 on the top of the A coil bottom clamp 54 and align the holes by cooperating with the A coil center tube 55 and the A coil positioning rod 57.

1.1.3. Assemble the multiple bit pieces of the A coil body 14 in a specific order from bottom to top on top of the A coil lower end plate 13 and align the holes by cooperating with the A coil center tube 55 and the A coil positioning rod 1 .

1.1.4. Every time the A coil main body 14 is assembled to a certain height, lift each A coil positioning rod 57 to a certain height, and use a rubber band 19 at a certain distance to cover the entire outside of all A coil positioning rods 57 to prevent the A coil positioning. Rod 57 falls.

1.1.5. After the A coil main body 14 is assembled, assemble the A coil upper end plate 15 above the A coil main body 14 and align the holes by cooperating with the A coil center tube 55 and the A coil positioning rod 57.

1.1.6. Take out the A coil center tube 55, move the A coil lower end plate 13, A coil main body 14 and A coil upper end plate 15 together with the A coil positioning rod 57 and rubber band 19 out of the A coil support clamp 11, and move the A coil The lower electrode barrel section 12 is assembled below the A coil lower end plate 13 and aligned with the hole position by cooperating with the A coil positioning rod 57. The A coil upper electrode barrel section 16 is assembled above the A coil upper end plate 15 and through the A coil positioning rod 57. The fit of the positioning rod 57 is aligned with the hole position.

1.1.7. Assemble the second section 11 of the lower electrode barrel of the A coil to the bottom of the first section 12 of the lower electrode barrel of the A coil and align the holes. Assemble the second section 17 of the upper electrode barrel of the A coil above the first section 16 of the upper electrode barrel of the A coil. Align the holes, and the A coil 1 assembly is completed.

1.2. Use the A coil pressing and tightening fixture 7 to cooperate with the press to press and tighten the A coil 1, including the following steps:

1.2.1. Connect the support connection column 76 to the top of the second section 17 of the electrode barrel on coil A. Place the insulating pad 77 on the top of the support connection column 76. Pass the tightening rod 71 through the A coil 1 and support connection column. 76 and insulating pad 77, install the upper tightening nut 73 and the lower tightening nut 72 on the upper and lower ends of the tightening rod 71 respectively, tighten the upper tightening nut 73 and the lower tightening nut 72 to tighten the A coil 1.

1.2.2. Fixedly connect the balance plate 75 to the lower fastening nut 72 through bolts, fixedly connect the wrench joint 74 to the upper fastening nut 73 through bolts, thread the pressure plate 78 to the outside of the support connecting column 76, and connect the two The support blocks 79 are symmetrically placed on both sides of the top of the pressure plate 78 .

1.2.3. Place A coil 1 on the press platform through the balance plate 75. The press presses on the top of the two support blocks 79 with a certain pressure. The pressure is transmitted through the support blocks 79, the pressure plate 78 and the support connection column 76. A coil 1 is pressed tightly.

1.2.4. Use a wrench to insert between the two support blocks 79 and cooperate with the hexagonal cylinder structure of the wrench joint 74. Turn the wrench to drive the wrench joint 74 to rotate. The wrench joint 74 drives the tightening nut 73 to tighten through the bolt. After the nut 73 is tightened, the press removes the pressure and the A coil 1 is pressed and tightened.

1.3. Measure the total resistance and turn resistance of A coil 1, and measure the height of A coil 1 after it is pressed and tightened.

Step 2, B coil assembly and parameter measurement, includes the following steps:

2.1. Assemble B coil 2 and use B coil positioning fixture 6 to position B coil 2, including the following steps:

2.1.1. Place the B coil lower end plate 23 on the B coil base 61 so that the center hole of the B coil lower end plate 23 matches the upper section of the B coil base 61.

2.1.2. Pass the B coil center tube 62 through the center hole of the B coil lower end plate 23 and place it on the top of the B coil base 61. Pass the 32 B coil positioning rods 63 respectively through the 32 B coil lower end plate 23. Locating holes.

2.1.3. Assemble the multiple bit pieces of the B coil body 24 in a specific order from bottom to top on top of the B coil lower end plate 23 and align the holes by cooperating with the B coil center tube 62 and the B coil positioning rod 63 .

2.1.4. After the B coil main body 24 is assembled, assemble the B coil upper end plate 25 above the B coil main body 24 and align the holes by cooperating with the B coil central tube 62 and the B coil positioning rod 63.

2.1.5. Take out the B coil center tube 62, pull out the B coil positioning rod 63, and replace each one with a fixed rod 28. After replacing 32 fixed rods 28, assemble the lower electrode tube section 22 of the B coil to the lower end of the B coil. The bottom of the plate 23 and align the holes with the fixing rod 28, assemble the upper electrode barrel section 26 of the B coil above the upper end plate 25 of the B coil and align the holes with the fixing rod 28.

2.1.6. Install insulators 29 and nuts on the upper and lower ends of each fixed rod 28. Tighten the nuts on the upper and lower ends of each fixed rod 28 so that the lower electrode barrel section 22 of the B coil, the lower end plate 23 of the B coil, the main body 24 of the B coil, and The coil upper end plate 25 and the B coil upper electrode barrel section 26 are fastened.

2.1.7. Tighten the second section 21 of the lower electrode barrel of the B coil to the bottom of the first section 22 of the lower electrode barrel of the B coil with bolts. Tighten the second section 27 of the upper electrode barrel of the B coil to the top of the first section 26 of the upper electrode barrel of the B coil. B coil 2 is assembled.

2.2. Use a press to press and tighten coil B 2, including the following steps:

2.2.1. Place B coil 2 on the press platform. The press presses the top of the second section 27 of the electrode barrel on the B coil with a certain pressure to compress the B coil 2 tightly.

2.2.2. Use a wrench to tighten the nuts at the upper end of each fixed rod 28. After tightening all the nuts, remove the pressure from the press and complete the tightening of B coil 2.

2.3. Measure the total resistance and turn resistance of coil B 2, and measure the height of coil B 2 after it is pressed and tightened.

Step 3, AB coil assembly and parameter measurement, includes the following steps:

3.1. Remove the balance plate 75, pressure plate 78 and support block 79 of the A coil pressing fixture 7, remove the A coil positioning rod 57 and rubber band 19 from the A coil 1, and secure the 16 insulating strips 18 respectively. It is stuck in the 16 strip grooves of the A coil 1, and a rubber band 19 is used at a certain distance on the A coil body 14 to cover the entire outside of all the insulating strips 18.

3.2. Remove the second section 21 of the lower electrode barrel of B coil from B coil 2, flip B coil 2 so that the first section 22 of the lower electrode barrel of B coil faces upward, turn A coil 1 so that the wrench joint 74 faces downward, and put A coil 1 in B inside coil 2.

3.3. Reinstall the second section 21 of the lower electrode barrel of the B coil. Place the lower connecting ring 3 on the outside of the lower section of the second section 11 of the lower electrode barrel of the A coil and thread it with the second section 21 of the lower electrode barrel of the B coil. Connect the A coil 1 and The B coil 2 is turned over as a whole so that the second section 21 of the lower electrode barrel of the B coil faces downward.

3.4. Based on the measured heights of A coil 1 and B coil 2, calculate the distance between the lower end of A coil 1 and the lower end of B coil 2 when the geometric centers of A coil 1 and B coil 2 are aligned, and connect the tightening ring 81 with the lower connecting ring 3 Connected by connecting pins, hold two crossbars 82 and rotate the fastening ring 81 to drive the lower connecting ring 3 to rotate, causing the lower connecting ring 3 to move up and down inside the B coil 2, and the lower connecting ring 3 drives the A coil 1 to move up and down. Let the lower end of A coil 1 reach the calculated position, so that the geometric centers of A coil 1 and B coil 2 are aligned.

3.5. Put the upper connecting ring 4 on the outside of the upper section of the second section 17 of the upper electrode barrel of the A coil and thread it with the second section 27 of the upper electrode barrel of the B coil. Remove the fastening ring 81 from the lower connecting ring 3 and put it on the support. The outside of the connecting column 76 is connected to the upper connecting ring 4 through connecting pins, and the AB coil assembly is completed.

3.6. Reinstall the balance plate 75, pressure plate 78 and support block 79. Place the AB coil on the press platform through the balance plate 75. The press presses on the top of the two support blocks 79 with a certain pressure. While pressing, Hold the two crossbars 82 and rotate the fastening ring 81 to drive the upper connecting ring 4 to rotate. Through the upper connecting ring 4, the second section 17 of the upper electrode barrel of the A coil is fastened to the second section 27 of the upper electrode barrel 27 of the B coil.

3.7. After the press reaches a certain pressure, use a wrench to insert between the two support blocks 79 to cooperate with the hexagonal cylinder structure of the wrench joint 74. Turn the wrench to drive the wrench joint 74 to rotate, and the wrench joint 74 drives the tightening nut 73 through the bolt. release.

3.8. Move the AB coil out of the press platform, remove the fastening rod 71, lower fastening nut 72, balance plate 75, upper fastening nut 73, wrench joint 74, support connecting column 76, insulating pad 77, pressure plate 78 and support. Block 79, AB coil tightening is completed.

3.9. Measure the total resistance and central magnetic field coefficient of the AB coil.

The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the foregoing embodiments. The recorded technical solutions may be modified, or some of the technical features thereof may be equivalently replaced; and these modifications or substitutions shall not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of each embodiment of the present invention.

Claims (9)

1. A water-cooled magnet assembly fixture in a hybrid magnet, characterized by: including an A coil positioning fixture, a B coil positioning fixture, an A coil pressing fixture and an AB coil tightening fixture; the water-cooled magnet has an A coil and a B coil, The A coil is arranged inside the B coil to form the AB coil; the A coil positioning fixture can position the A coil, the B coil positioning fixture can position the B coil, and the A coil pressing and fastening fixture can cooperate with the press to press the A coil Press and tighten, and the AB coil tightening fixture can cooperate with the press to tighten the AB coil. 2. The water-cooled magnet assembly fixture in the hybrid magnet according to claim 1, characterized in that: the A coil pressing and tightening fixture includes a tightening rod, a lower tightening nut and an upper tightening nut, and the upper tightening fixture The nut and the lower tightening nut are threadedly connected to the upper and lower ends of the tightening rod respectively. 3. The water-cooled magnet assembly fixture in the hybrid magnet according to claim 2, characterized in that: the A coil pressing and tightening fixture further includes a balance plate, a support connecting column, a pressure plate and a support block, and the balance plate is arranged on The lower part of the fastening rod is fixedly connected to the lower fastening nut, the support connecting column is sleeved on the outside of the fastening rod, the pressure plate is fixedly connected on the outside of the connecting column, and the support block Place on top of the platen. 4. The water-cooled magnet assembly fixture in the hybrid magnet according to claim 3, characterized in that: the A coil pressing and tightening fixture further includes a wrench joint, and the wrench joint is arranged above the tightening rod and connected with The upper fastening nut is fixedly connected, and the top of the wrench joint is provided with a structure that can cooperate with the wrench; there are two support blocks, and the two support blocks are symmetrically placed on both sides of the top of the pressure plate. 5. The water-cooled magnet assembly fixture in the hybrid magnet as claimed in claim 3, characterized in that: the outer surface of the fastening rod is wrapped with an insulating layer, and there is an insulating layer between the support connecting column and the upper fastening nut. Insulating pad, an annular insulating pad is placed on the outside of the fastening rod. 6. The water-cooled magnet assembly fixture in the hybrid magnet according to claim 1, characterized in that: the A coil positioning fixture includes a support plate, a support leg, an A coil base, an A coil center cylinder and an A coil positioning rod; The support legs are fixedly connected to the bottom of the support plate, the A coil base is fixedly connected to the top of the support plate, the A coil center tube is arranged above the A coil base; a plurality of A coil positioning rods surround On the outside of the A coil central cylinder, the A coil positioning rod passes through the A coil base and the support plate. 7. The water-cooled magnet assembly fixture in the hybrid magnet according to claim 6, wherein the A coil positioning fixture further includes an A coil bottom fixture and a support rod, and the A coil bottom fixture is arranged on the A coil base. In the groove at the top, the A coil center barrel passes through the A coil bottom clamp, and the support rod passes through the support plate and the A coil base and is supported at the bottom of the A coil center barrel. 8. The water-cooled magnet assembly fixture in the hybrid magnet according to claim 1, characterized in that: the B coil positioning fixture includes a B coil base, a B coil center cylinder and a B coil positioning rod, and the B coil center cylinder is arranged on Above the B coil base, a plurality of B coil positioning rods surround the outside of the B coil base. 9. The water-cooled magnet assembly fixture in the hybrid magnet according to claim 8, wherein the upper section of the B coil base protrudes at the top middle position of the lower section.