Apparatus and method for lifting in place a poloidal field magnet for a fusion reactor

Abstract

The application provides a fusion reactor bottom poloidal field magnet lifting and positioning device and method, and belongs to the technical field of fusion reactor installation. The device is provided with a plurality of groups of hydraulic hoists, which comprise a hydraulic cylinder assembly, a piston assembly, a clamping assembly and a support plate. The cylinder body of the hydraulic cylinder assembly is fixed at the bottom of the support plate, the piston assembly is axially slidably installed in the cylinder body, and the clamping assembly is installed in the piston assembly. The clamping assembly comprises a plurality of clamping rods arranged in an annular array in the piston assembly. The clamping rods are axially elastically telescopic in the piston assembly to clamp the steel strand rope. One end of the steel strand rope is connected with the support plate, and the other end passes through the support plate and the shaft hole after passing around a reversing wheel. When the first oil hole of the cylinder body is filled with oil, the second oil hole is closed, the clamping rods axially slide to clamp the steel strand rope, the second oil hole is discharged, the piston assembly and the steel strand rope are synchronously moved downward, and the poloidal field magnet is lifted. The application has a simple and compact structure, is less dependent on manpower, and can greatly improve the installation efficiency of the fusion reactor bottom poloidal magnetic field.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fusion reactor installation, in particular, the present application mainly relates to a device and method for lifting and positioning a bottom poloidal field magnet of a fusion reactor. BACKGROUND

[0002] How to solve the energy problem is one of the serious problems faced by countries at this stage, and nuclear fusion energy is a new type of clean energy. Controllable nuclear fusion is an important field that the world is actively researching and exploring. Controllable nuclear fusion uses a device called Tokamak to confine high-temperature plasma, so that the plasma undergoes fusion reaction in the vacuum chamber to release a huge amount of energy, which is finally used by humans through energy conversion. The fusion device is composed of thousands of parts, and the poloidal field magnet is one of the core components of the device main system, which is an important part of the completion of the construction of the fusion device. Its assembly process is very complex, especially the bottom poloidal field magnet, which needs to be temporarily hoisted into the main machine pit, and then the temporarily positioned poloidal field magnet is lifted to the longitudinal field magnet installation surface after the longitudinal field magnet is installed in place. Finally, it is installed in place.

[0003] At present, the final positioning of the bottom poloidal field magnet of the domestic fusion reactor is achieved by using a jacking structure, which temporarily hoists the poloidal field magnet on a hydraulic jacking tool. The jacking tool is divided into A / B groups and is evenly and alternately arranged. After the A group is jacked up, a fixed-thickness pad is placed on the B group tool, and the two groups of tools are alternately repeated to jack up the bottom poloidal field magnet to the predetermined height and finally position it. This jacking and positioning method is complex and slow to operate, and the operator needs to work at height, constantly inserting the pad into the jacking tool and the poloidal field magnet. Moreover, the jacking tool structure is complex and expensive. SUMMARY

[0004] The present application provides a device and method for lifting and positioning a bottom poloidal field magnet of a fusion reactor, which aims to provide a simple and reliable structure that can meet the compact fusion reactor poloidal field magnet lifting requirements in space, with moderate load, the number of hoists can be increased or decreased according to the weight of the poloidal field magnet, the operation is simple, economical and suitable, and it does not require too much manual operation. It can automatically control the continuous operation of the hoist and accurately lift the poloidal field magnet into place step by step.

[0005] The technical scheme adopted by the skilled person in the art to achieve the above-mentioned purposes is as follows: a device for lifting a poloidal field magnet into position at the bottom of a fusion reactor, comprising a plurality of alternately activated hydraulic hoists, the hydraulic hoist comprising a hydraulic cylinder assembly, a piston assembly, a clamping assembly and a support plate, the cylinder body of the hydraulic cylinder assembly being fixed at the bottom of the support plate, the piston assembly being axially slidably mounted in the cylinder body, the clamping assembly being mounted in the piston assembly, the clamping assembly comprising a plurality of clamping rods arranged in an annular array in the piston assembly, a return spring and a sealing ring, the clamping rods being inclined and having their bottom ends converging towards the shaft hole of the piston assembly, the top ends of the clamping rods being provided with the sealing ring, and the return spring being sleeved below the sealing ring to achieve the axial elastic expansion and contraction movement of the clamping rods in the piston assembly; the shaft hole is used for allowing the steel strand rope to freely pass through, and one end of the steel strand rope is connected to the support plate, and the other end of the steel strand rope passes through the support plate and the shaft hole in turn after passing through the reversing wheel downward.

[0006] A first oil hole is provided at the top side of the cylinder body, and a second oil hole is provided at the bottom side of the cylinder body, when the first oil hole is supplied with oil, the second oil hole is closed, so that the clamping rods slide axially to press the steel strand rope, and after clamping the steel strand rope, the second oil hole is supplied with oil to make the piston assembly and the steel strand rope move downward synchronously to lift the support plate and the poloidal field magnet located on the support plate.

[0007] Further, the hydraulic cylinder assembly further comprises a fixing frame, a flange sealing plate and a flange gasket, the fixing frame being detachably fixed to the bottom of the support plate by bolts, the flange plate sealingly covering both ends of the cylinder body, and the flange gasket being located between the flange sealing plate and the end face of the cylinder body.

[0008] Further, the clamping rod comprises a sliding circular table at the top end and a clamping rod coaxially fixed at the bottom end of the sliding circular table, the sealing ring being fixedly sleeved on the circumferential surface of the sliding circular table, and the return spring being sleeved on the clamping rod, and the top end of the return spring being connected to the bottom end face of the sliding circular table, and the bottom end of the return spring being connected to the stepped face of the stepped hole in the piston assembly for the axial sliding installation of the clamping rod.

[0009] Further, the clamping rod is provided with at least three clamping rods. In addition, the bottom end side of the clamping rod has a strip-shaped groove for placing the surface of the steel strand rope, and the cross section of the strip-shaped groove is a circular arc shape suitable for the steel strand rope; the groove bottom of the strip-shaped groove is provided with a plurality of convex edges along the length direction, and the convex edges are used for frictional contact with the steel strand rope.

[0010] Further, the hydraulic hoists are arranged in pairs, two pairs of hydraulic hoists are installed on each support plate, and the two pairs of hydraulic hoists are alternately activated.

[0011] Further, the bottom end of the at least one screw rod is fixedly screwed on the support plate, a pressing plate is sleeved on the top end of the screw rod, the pressing plate is provided for the steel strand to freely pass through, and the support plate and the pressing plate clamp the poloidal field magnet.

[0012] Further, the first oil hole and the second oil hole are respectively connected to two oil passing holes of an oil tank through oil supply pipelines, the oil tank has a cylindrical cavity in communication with the oil passing holes, the rear end of the oil tank is connected to an oil pipe coaxial with the cylindrical cavity, a core column is coaxially and sealingly installed in the cylindrical cavity, the core column is provided with an oil supply hole, one end of a rotating shaft exposed from the front end of the oil tank is fixed to one end of an oscillating arm, the oscillating arm and the oil tank are hingedly connected through a torsion spring, the other end of the oscillating arm is provided with a permanent magnet, the front end of the oil tank is further provided with a first electromagnet and a second electromagnet, the permanent magnet on the oscillating arm is located between the two electromagnets in a normal state, when the two electromagnets are separately electrified, the permanent magnet is attracted to make the core column rotate synchronously with the oscillating arm, and when the permanent magnet contacts and is fixed to the corresponding electromagnet, the first oil hole or the second oil hole is aligned and communicated with the oil supply hole.

[0013] Further, when the first oil hole is communicated with the oil supply hole, the permanent magnet is adsorbed and contacted with the second electromagnet, a three-way joint is installed on the second oil hole, one port of the three-way joint is used for communication with the oil supply hole, and the other port is communicated with an oil return pipeline through an electromagnetic valve, the oscillating arm is connected to a sub-arm through an arc-shaped compression spring, the sub-arm is sleeved on the outside of the core column away from the arc-shaped compression spring and is rotationally connected with the oscillating arm, the front end of the oil tank is further provided with a third electromagnet, a permanent magnet is fixed to one side of the end of the sub-arm, the permanent magnet is provided with a valve switch for controlling the electromagnetic valve, the sub-arm can rotate with the oscillating arm under the action of the arc-shaped compression spring, when the permanent magnet is adsorbed and connected with the second electromagnet to disconnect the second electromagnet, the third electromagnet is electrified to attract the permanent magnet, and at this time, the thrust of the arc-shaped compression spring on the oscillating arm makes the permanent magnet continue to maintain the contact state with the second electromagnet after being disconnected.

[0014] Meanwhile, the application also provides a method for lifting and positioning a poloidal field magnet at the bottom of a fusion reactor, which adopts the aforementioned lifting and positioning device for the poloidal field magnet at the bottom of the fusion reactor to lift, and the specific operation steps include:

[0015] The hydraulic hoist is divided into at least a first group and a second group, and the hydraulic hoist is arranged around the poloidal field magnet; the fixed strand rope is fixed on the support plate at one end and passes through the shaft hole of the support plate and the piston assembly downward after passing through the reversing wheel; the first group of hydraulic hoists is controlled to work, the poloidal field magnet is lifted by one stroke height, and the oil inlet state is temporarily maintained to ensure the clamping state of the strand rope; the second group of hydraulic hoists is controlled to work, the poloidal field magnet is continuously lifted, and the oil inlet state is temporarily maintained; the first group of hydraulic hoists is controlled to reset, the corresponding strand rope naturally droops, and the two groups of hoists continue to work alternately.

[0016] The poloidal field magnet is lifted to a predetermined height and contacts the toroidal field magnet which has been positioned, the two groups of hydraulic hoists are kept in the working state of clamping the strand rope, part of the fixed bolts related to the poloidal field magnet are installed, the poloidal field magnet is ensured to be in a stable state, and finally the hydraulic hoists are removed and the remaining bolts are installed.

[0017] Compared with the prior art, the present application mainly has the following beneficial effects:

[0018] 1. The structure of the present application is a set of hydraulic full-automatic lifting equipment, which is simple in structure, compact in size and suitable for the lifting and installation of components of a compact fusion reactor.

[0019] 2. The hydraulic hoist of the present application is exquisite in structure and contains a clamping assembly and a piston assembly, wherein the clamping assembly is composed of two left and right clamping rods with wedge-shaped structures and a reset spring, the piston assembly moves while clamping the strand rope, and the poloidal field magnet is driven to move upward.

[0020] 3. The lifting method of the present application is simple in operation, higher in efficiency and reduces manual operation in the lifting process.

[0021] 4. The principle of controlling the hydraulic hoist of the present application is to divide the hydraulic hoist into two groups, and the two groups of hydraulic hoists work alternately, one group works while the other group continuously clamps the strand rope, the double-redundancy program prevents the magnet from falling and ensures the safety of construction.

[0022] 5. The present application is applicable to poloidal field magnets of different sizes and weights, the number of hoists can be increased or decreased according to the load, and is not limited to the use of fusion reactors, but can be applied to the lifting and installation of large workpieces in various working conditions.

[0023] Other positive effects, advantages and optimized technical features of the present application will be illustrated and embodied through the detailed description of subsequent specific embodiments, and some technical features need to be better understood and used by those skilled in the art through sufficient research and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1Structure diagram of the invention in lifting the poloidal field magnet of the fusion reactor bottom;

[0025] Figure 2 Sectional view of the hydraulic hoist clamping the steel strand rope;

[0026] Figure 3 Sectional view of the hydraulic cylinder assembly;

[0027] Figure 4 Sectional view of the piston assembly;

[0028] Figure 5 Schematic diagram of the round array of clamping rods;

[0029] Figure 6 Schematic diagram of the several hydraulic cylinder assemblies installed on the support plate;

[0030] Figure 7 Initial structure diagram of the oil supply structure of the two oil holes;

[0031] Figure 8 Schematic diagram of the oil supply structure when the first oil hole inputs hydraulic oil (when clamping the steel strand rope);

[0032] Figure 9 Schematic diagram of the oil supply structure when the first oil hole continuously inputs oil and the second oil hole outputs oil through the electromagnetic valve (when clamping the steel strand rope and pulling the steel strand rope downward);

[0033] Figure 10 Sectional view of the connecting structure of the pivot at the end of the core column and the swing arm and the auxiliary arm.

[0034] Wherein, the fixed frame 1, the flange sealing plate 2, the flange gasket 3, the cylinder body 4, the first oil hole 5, the guide part 6, the sealing ring 7, the sliding circular table 8, the reset spring 9, the clamping rod 10, the steel strand rope 11, the hydraulic cylinder assembly 12, the clamping rod 13, the piston assembly 14, the support plate 15, the first group of hydraulic hoists 16, the second group of hydraulic hoists 17, the screw rod 18, the poloidal field magnet 19, the pressing plate 20, the second oil hole 21, the oil tank 22, the oil passing hole 23, the oil supply hole 24, the swing arm 25, the permanent magnet 26, the second electromagnet 27, the first electromagnet 28, the core column 29, the pivot 30, the torsional spring 31, the auxiliary arm 32, the arc-shaped compression spring 33, the permanent magnet 34, the third electromagnet 35, the tee joint 36, the oil return pipeline 37, and the electromagnetic valve 38. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects solved by the present application more clear, the principles of the present application will be explained in detail in conjunction with the drawings and at least one specific embodiment. Those skilled in the art should know that the specific embodiments described below are only used to explain the technical principles of the present application, and are not used to limit the present application to such embodiments.

[0036] As a specific embodiment of the present application, a lifting-in-place device for a fusion reactor bottom poloidal field magnet is described in detail, such as Figure 1 As shown, the lifting-in-place device mainly comprises a plurality of alternating hydraulic hoists, specifically, as shown in Figures 2-4 The hydraulic hoist comprises a hydraulic cylinder assembly 12, a piston assembly 14, a clamping assembly and a support plate 15, wherein the cylinder body 4 of the hydraulic cylinder assembly 12 is fixed at the bottom of the support plate 15 to achieve fixed installation of the hydraulic hoist, and the piston assembly 14 is axially slidably installed in the cylinder body 4, which can have a cylindrical guide portion 6 at each end of the piston assembly 14, and the upper and lower two regions of the piston assembly 14 form two independent oil storage regions. The clamping assembly is installed in the piston assembly 14, for example, the clamping assembly comprises a plurality of clamping rods 13 arranged in an annular array in the piston assembly 14, a return spring 9 and a sealing ring, each clamping rod 13 is provided with a sealing ring and a return spring 9, so that the clamping rod 13 is inclined, and the bottom end of the clamping rod 13 is close to the shaft hole of the piston assembly 14, forming a clamping tendency. A sealing ring is sleeved at the top end of the clamping rod 13, and a return spring 9 is sleeved below the sealing ring of the clamping rod 13 to achieve axial elastic expansion and contraction movement of the clamping rod 13 in the piston assembly 14. In addition, in particular, the shaft hole of the piston assembly 14 is used for the steel strand 11 to pass through freely, that is, the steel strand can move freely in the shaft hole, and one end of the steel strand 11 is connected with the support plate 15, and the other end passes through the support plate 15 and the shaft hole of the piston assembly 14 in turn freely after passing through the reversing wheel downward, and the reversing wheel can be adaptively installed above the poloidal field magnet 19 installation position, forming a force point of the steel strand.

[0037] In addition, in the present embodiment, as shown in Figures 2-3It is also required to provide the first oil hole 5 on the top side of the cylinder body 4 and the second oil hole 21 on the bottom side. In use, when oil is fed into the first oil hole 5, the second oil hole 21 is in a closed state, and the oil inside the cylinder body 4 in the lower area of the piston assembly 14 is sealed. The first oil hole 5 feeds oil to push the clamping rods 13 to move axially, but the piston assembly 14 does not move axially downward, so that the clamping rods 13 can slide axially to press the steel strand 11, thereby achieving clamping of the steel strand 11. After the steel strand 11 is clamped, the second oil hole 21 discharges oil to make the piston assembly 14 move downward with the steel strand 11, that is, pull the steel strand 11 to move downward, so that the other section of the steel strand 11 connected to the support plate 15 can move upward, thereby lifting the support plate 15 and the poloidal field magnet 19 on the support plate 15, and the poloidal field magnet 19 is lifted step by step to the position, which is very ingenious.

[0038] Specifically, as shown in Figure 3 The hydraulic cylinder assembly 12 of the embodiment further includes a fixed frame 1, a flange sealing plate 2, and a flange gasket 3. The fixed frame 1 is detachably fixed to the bottom of the support plate 15 by bolts. The fixed frame 1 can be a plate member, which is convenient to fix with the support plate 15. The flange plate sealingly covers both ends of the cylinder body 4, and the flange gasket 3 is located between the flange sealing plate 2 and the end face of the cylinder body 4 to seal and install the cylinder body 4.

[0039] As shown in Figure 5 The clamping rod 13 includes a sliding circular table 8 at the top end and a clamping rod 10 coaxially fixed at the bottom end of the sliding circular table 8. A sealing ring is fixedly sleeved on the circumferential surface of the sliding circular table 8, and a return spring 9 is sleeved on the clamping rod 10. The top end of the return spring 9 is connected with the bottom end face of the sliding circular table 8, and the bottom end is connected with the stepped face of the stepped hole on the piston assembly 14 for axial sliding installation of the clamping rod 13. Thus, elastic expansion and contraction movement is realized under hydraulic drive. When the hydraulic pressure decreases or disappears, the clamping rod 13 can retract to release the steel strand 11. In order to clamp the steel strand 11 well, at least three clamping rods 13 are provided. In addition, the bottom end side of the clamping rod 10, that is, the side facing the steel strand 11, has a strip-shaped groove for placing the surface of the steel strand 11. The cross section of the strip-shaped groove is a circular arc shape suitable for the steel strand 11. The groove bottom of the strip-shaped groove is provided with a plurality of convex edges along the length direction, which are used for frictional contact with the steel strand 11 to improve the clamping force.

[0040] In the embodiment, in order to make each support plate 15 more stable, the hydraulic hoists are arranged in pairs, that is, even if one of each group of hydraulic hoists fails, the other one can also bear the lifting function. Specifically, two groups of hydraulic hoists are installed on each support plate 15, and the two groups of hydraulic hoists are started alternately to realize intermittent climbing of the support plate 15 and the poloidal field magnet 19.

[0041] In order to more firmly lift the poloidal field magnet 19, as shown in Figure 1 and Figure 6 The bottom end of at least one screw rod 18 is fixed on the support plate 15 by a plurality of nuts, and the top end of the screw rod 18 is sleeved with a pressing plate 20, Figure 1 In order to facilitate display, part of the pressing plate 20 and the screw rod 18 are in an unconnected state, and the corresponding nut is also in an unfastened state. The above-mentioned pressing plate 20 can supply the steel strand 11 to pass through freely, that is, a corresponding circular hole is provided on the pressing plate 20 for the steel strand 11 to pass through freely. When installed, the support plate 15 and the pressing plate 20 clamp the poloidal field magnet 19, and in the specific operation, the corresponding nut on the screw rod 18 is tightened, so that the pressing plate 20, the poloidal field magnet 19 and the support plate 15 are fixed as a whole.

[0042] As a specific implementation detail example, in the embodiment, as shown in Figure 7 The first oil hole 5 and the second oil hole 21 are respectively connected to two oil passing holes 23 of an oil tank 22 through oil pipelines, the oil tank 22 has a cylindrical cavity in communication with the oil passing holes 23, the rear end of the oil tank 22 is connected to an oil pipe coaxial with the cylindrical cavity, a core column 29 is coaxially and sealingly installed in the cylindrical cavity, and a plurality of oil supply holes 24 are provided on the core column 29. The purpose of these oil supply holes 24 is to align and communicate with the corresponding oil passing holes 23 in use to conduct the corresponding oil path. As shown in Figure 7 , Figure 10 The end of the core column 29 fixed with the rotating shaft 30 protrudes from one end of the front end of the oil tank 22, one end of a swing arm 25 is fixed, and the swing arm 25 is dampedly hinged between the end face of the oil tank 22 through a torsional spring 31. The torsional spring 31 can be adaptively installed, and the purpose is to have resistance when the swing arm is rotated by external force after being connected through the torsional spring 31, and the swing arm with the core column can quickly reset after the external force disappears. In addition, a permanent magnet 26 must also be installed on the other end of the swing arm 25. Correspondingly, based on the above structure design, as shown in Figure 7 , a first electromagnet 28 and a second electromagnet 27 are also provided at the front end of the oil tank 22. The permanent magnet 26 on the swing arm 25 is located between the two electromagnets in the normal state by the torsional spring 31, and when the two electromagnets are separately electrified, the permanent magnet 26 is attracted to make the core column 29 rotate or swing synchronously with the swing arm 25. When a certain electromagnet is electrified, the permanent magnet 26 contacts and fixes the corresponding electromagnet. At this time, the first oil hole 5 or the second oil hole 21 is aligned and communicated with the oil supply hole 24, and the corresponding oil path is opened.

[0043] Specifically, in the embodiment, as shown in Figure 8When the permanent magnet 26 is in contact with the second electromagnet 27, the first oil hole 5 is in communication with the oil supply hole 24; a three-way joint 36 is installed on the second oil hole 21, one port of the three-way joint 36 is used to communicate with the oil supply hole 24, and the other port is in communication with the oil return pipeline 37 through an electromagnetic valve 38. The swing arm 25 is connected with a sub-arm 32 through an arc-shaped compression spring 33, the end of the sub-arm 32 away from the arc-shaped compression spring 33 is sleeved outside the core column 29 and is rotationally connected with the swing arm 25; the front end of the oil tank 22 is also provided with a third electromagnet 35, and one side of the end of the sub-arm 32 is fixedly provided with a permanent magnet 34, and the permanent magnet 34 is provided with a valve switch (not shown in the figure) for controlling the electromagnetic valve 38; when the valve switch is pressed, the other port of the three-way joint 36 outputs hydraulic oil, and the hydraulic oil is transported to the oil return pipeline 37, and the hydraulic oil in the cylinder 4 below the piston assembly 14 is discharged, so that the piston assembly 14 can move downward with the steel strand. The sub-arm 32 of the embodiment can rotate with the swing arm 25 under the action of the arc-shaped compression spring 33, that is, the swing arm 25 and the sub-arm 32 are integrated by the arc-shaped compression spring 33. When the second electromagnet 27 is powered off after the permanent magnet 26 and the second electromagnet 27 have been connected by adsorption, there is no magnetic attraction between the permanent magnet 26 and the second electromagnet 27, but when the third electromagnet 35 is powered on, the permanent magnet 34 can be attracted, that is, the sub-arm 32 approaches the third electromagnet 35 until the third electromagnet 35 and the permanent magnet 34 are connected by attraction, at this time, the thrust of the arc-shaped compression spring 33 on the swing arm 25 makes the permanent magnet 26 continue to maintain the contact state with the second electromagnet 27 after being powered off, and maintains the state of supplying oil to the first oil hole 5, so that although the second electromagnet 27 has been powered off and cannot attract the fixed permanent magnet 26, the two still maintain a stable contact relationship due to the action of the arc-shaped compression spring 33, that is, the state of supplying oil to the first oil hole 5 is maintained, so that when the second oil hole 21 discharges oil outward, the piston assembly 14 further moves downward with the steel strand.

[0044] The above design structure is mainly used for switching the driving oil circuit of the hydraulic hoist, and better realizes the lifting mode of the hydraulic drive in the application. After the hydraulic hoist automatically grasps the steel strand 11 according to the actions of a series of structural elements, the poloidal field magnet is climbed upward, and after climbing to a height, the steel strand 11 is automatically released, so that the next group of hydraulic hoists performs the same action, and the two groups of hydraulic hoists work alternately to lift the poloidal field magnet to the final position.

[0045] Based on the above embodiment, as another embodiment, a method for lifting a poloidal field magnet at the bottom of a fusion reactor to a position is introduced. The method uses the lifting device for lifting a poloidal field magnet 19 at the bottom of a fusion reactor in the foregoing embodiment to lift the poloidal field magnet 19, and the specific operation steps are as follows: Figure 6The hydraulic hoists are divided into at least a first group and a second group, and a plurality of such first and second groups of hydraulic hoists 17 can be arranged around the poloidal field magnet 19 according to the need. Then the steel strand 11 is fixed, one end of which is fixed on the support plate 15, and the other end thereof passes through the shaft hole of the support plate 15 and the piston assembly 14 after winding around an upper reversing wheel. In operation, the first group of hydraulic hoists 16 is controlled to work, the poloidal field magnet 19 is lifted by one stroke height, and the oil feeding state is temporarily maintained to ensure the clamping state of the steel strand 11, then the second group of hydraulic hoists 17 is controlled to work, the poloidal field magnet 19 is continuously lifted, and the oil feeding state is temporarily maintained, during which the steel strand 11 of the first group of hydraulic hoists 16 is released from the original tensioned state and even freely bends, and then the first group of hydraulic hoists 16 is controlled to reset, i.e. the clamping rod 13 in the first group of hydraulic hoists 16 releases the steel strand 11, so that the steel strand 11 naturally drops, and then when the clamping rod 13 in the first group of hydraulic hoists 16 clamps the corresponding steel strand 11 in the natural dropped state again, the above steps are repeated to lift the support plate 15 and the poloidal field magnet 19 by one height again, and the above steps are repeated to alternately work the two groups of hoists to lift the poloidal field magnet 19 to the position. When the poloidal field magnet 19 is lifted to the predetermined height, it can be in contact with the toroidal field magnet which has been positioned, the two groups of hydraulic hoists are kept in the working state of clamping the steel strand 11 to maintain the stability of the position of the poloidal field magnet 19, then the relevant fixing bolts of the poloidal field magnet 19 are installed to ensure that the poloidal field magnet 19 can also be in a stable state after the hydraulic hoists are removed, i.e. connected with the toroidal field magnet which has been installed in position, and finally the hydraulic hoists are removed, the remaining bolts are installed, and the poloidal field magnet 19 is completely installed and fixed.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit the present application. A series of detailed descriptions of the embodiments of the present application are provided, and the technical principles and implementation manners of the present application are described in detail. The detailed descriptions are only used to help the skilled in the art to have a deep and comprehensive understanding of the design concept of the present application, and should not be understood as the only or selected limitation of the technical principles of the present application. As for the detailed description of the preferred embodiments of the present application, the skilled in the art should be able to make simple modifications or equivalent replacement of means on the basis of the preferred embodiments, but the core technical principles should be covered in the protection scope embodied by the claims of the present application without deviating from the technical ideas, design purposes and application scope of the present application.

Claims

1. A device for lifting in place a poloidal field magnet of a fusion reactor bottom, comprising several hydraulic hoists activated alternately, characterized in that, The hydraulic hoist comprises a hydraulic cylinder assembly (12), a piston assembly (14), a clamping assembly and a support plate (15), the cylinder body (4) of the hydraulic cylinder assembly (12) is fixed at the bottom of the support plate (15), the piston assembly (14) is axially slidably installed in the cylinder body (4), the clamping assembly is installed in the piston assembly (14), the clamping assembly comprises a plurality of clamping rods (13) arranged in an annular array in the piston assembly (14), a reset spring (9) and a sealing ring, the clamping rods (13) are obliquely arranged with the bottom end approaching the shaft hole of the piston assembly (14), the top end is sleeved with the sealing ring, the reset spring (9) is sleeved below the sealing ring, so as to realize the axial elastic expansion and contraction movement of the clamping rods (13) in the piston assembly (14); the shaft hole is used for allowing the steel strand (11) to freely pass through, and one end of the steel strand (11) is connected with the support plate (15), and the other end passes through the reversing wheel and then freely passes through the support plate (15) and the shaft hole in sequence downward. A first oil hole (5) is arranged at one side of the top of the cylinder body (4), and a second oil hole (21) is arranged at one side of the bottom, when the first oil hole (5) is filled with oil, the second oil hole (21) is closed, so that the clamping rod (13) axially slides to extrude the steel strand (11), and after clamping the steel strand (11), the second oil hole (21) is filled with oil, so that the piston assembly (14) and the steel strand (11) move downward synchronously, so as to lift the support plate (15) and the poloidal field magnet (19) located on the support plate (15).

2. A device for lifting and positioning a poloidal field magnet for a fusion reactor according to claim 1, characterized in that, The hydraulic cylinder assembly (12) further comprises a fixing frame (1), a flange sealing plate (2) and a flange gasket (3), the fixing frame (1) is detachably fixed on the bottom of the support plate (15) by bolts, the flange sealing plate (2) sealingly covers both ends of the cylinder body (4), and the flange gasket (3) is located between the flange sealing plate (2) and the end face of the cylinder body (4).

3. A device for lifting and positioning a poloidal field magnet for a fusion reactor according to claim 1, characterized in that, The clamping rod (13) comprises a sliding circular table (8) at the top end and a clamping rod (10) coaxially fixed at the bottom end of the sliding circular table (8), the sealing ring is fixedly sleeved on the circumferential surface of the sliding circular table (8), the reset spring (9) is sleeved on the clamping rod (10), and the top end of the reset spring (9) is connected with the bottom end face of the sliding circular table (8), and the bottom end is connected with the stepped face of the stepped hole of the piston assembly (14) for the axial sliding installation of the clamping rod (13).

4. A device for lifting and positioning a poloidal field magnet for a fusion reactor bottom according to claim 3, characterized in that, The clamping rod (13) is provided with at least three.

5. A device for lifting and positioning a poloidal field magnet for a fusion reactor bottom according to claim 3, characterized in that, The bottom end side of the clamping rod (10) has a strip-shaped groove for placing the surface of the steel strand (11), and the cross section of the strip-shaped groove is a circular arc shape suitable for the steel strand (11); a plurality of convex edges are arranged on the groove bottom along the length direction of the strip-shaped groove, and the convex edges are used for frictionally contacting the steel strand (11).

6. A device for lifting and positioning a poloidal field magnet for a fusion reactor according to claim 1, characterized in that, The hydraulic hoists are alternately started in two groups.

7. A device for lifting and positioning a poloidal field magnet for a fusion reactor according to claim 1, characterized in that, The bottom end of the support plate (15) is screwed with at least one screw rod (18), the top end of the screw rod (18) is sleeved with a pressing plate (20), the pressing plate (20) can be freely passed through the steel strand (11), and the support plate (15) and the pressing plate (20) clamp the poloidal field magnet (19).

8. A device for lifting and positioning a poloidal field magnet for a fusion reactor according to claim 1, characterized in that, The first oil hole (5) and the second oil hole (21) are connected to two oil passing holes (23) of an oil tank (22) through oil conveying pipelines respectively, the oil tank (22) has a cylindrical cavity communicating with the oil passing holes (23) inside, the rear end of the oil tank (22) is connected with an oil pipe coaxial with the cylindrical cavity, a core column (29) is coaxially and sealingly installed in the cylindrical cavity, the core column (29) is provided with an oil supply hole (24), the fixed rotating shaft (30) of the core column (29) is exposed at one end of the front end of the oil tank (22) and is fixed with one end of a swing arm (25), the swing arm (25) is dampedly hinged with the oil tank (22) through a torsion spring (31), and the other end of the swing arm (25) is installed with a permanent magnet (26). The front end of the oil tank (22) is further provided with a first electromagnet (28) and a second electromagnet (27), the torsion spring (31) makes the permanent magnet (26) on the swing arm (25) be located between the two electromagnets in a normal state, and when the two electromagnets are separately electrified, the permanent magnet (26) is attracted to make the core column (29) rotate synchronously with the swing arm (25), when the permanent magnet (26) is in contact with the corresponding electromagnet, the first oil hole (5) or the second oil hole (21) is aligned and communicated with the oil supply hole (24).

9. A device for lifting in place a poloidal field magnet of the bottom of a fusion reactor according to claim 8, characterized in that, When the permanent magnet (26) is in contact with the second electromagnet (27), the first oil hole (5) is communicated with the oil supply hole (24); the second oil hole (21) is installed with a three-way joint (36), one port of the three-way joint (36) is used for communicating with the oil supply hole (24), and the other port is communicated with a return oil pipeline (37) through an electromagnetic valve (38); the swing arm (25) is connected with a sub-arm (32) through an arc-shaped compression spring (33), one end of the sub-arm (32) away from the arc-shaped compression spring (33) is sleeved outside the core column (29) and is rotatably connected with the swing arm (25); the front end of the oil tank (22) is further provided with a third electromagnet (35), one side of the end of the sub-arm (32) is fixed with a permanent magnet (34), the permanent magnet (34) is provided with a valve switch for controlling the electromagnetic valve (38); the sub-arm (32) can rotate with the swing arm (25) under the action of the arc-shaped compression spring (33); when the permanent magnet (26) is connected with the second electromagnet (27) to disconnect the second electromagnet (27), the third electromagnet (35) is electrified to attract the permanent magnet (34) to press the valve switch to make the other port of the three-way joint (36) output hydraulic oil, and at this time, the thrust of the arc-shaped compression spring (33) on the swing arm (25) makes the permanent magnet (26) continue to maintain the contact state with the second electromagnet (27) after being disconnected.

10. A method for lifting in place a poloidal field magnet for a fusion reactor, characterized in that, The operation steps of lifting by using the lifting-in-place device for the poloidal field magnet of the fusion reactor bottom as claimed in any one of claims 1-9 include: S1, dividing the hydraulic hoists into at least a first group and a second group, and surrounding all the hydraulic hoists around the poloidal field magnet (19); S2, installing the steel strand rope (11), one end of which is fixed on the support plate (15), and the other end of which passes through the shaft hole of the support plate (15) and the piston assembly (14) downward after winding around the reversing wheel; S3, controlling the first group of hydraulic hoists (16) to work, lifting the poloidal field magnet (19) by one stroke height, and temporarily maintaining the oil feeding state to ensure that the steel strand rope (11) is in the clamped state; S4, controlling the second group of hydraulic hoists (17) to work, continuing to lift the poloidal field magnet (19), and temporarily maintaining the oil feeding state; S5, controlling the first group of hydraulic hoists (16) to reset, and the corresponding steel strand rope (11) naturally droops, and the two groups of hydraulic hoists continue to work alternately; S6, lifting the poloidal field magnet (19) to the predetermined height to contact the already positioned toroidal field magnet, and keeping the two groups of hydraulic hoists in the working state of clamping the steel strand rope (11); S7, installing the partial fixing bolts between the poloidal field magnet (19) and the toroidal field magnet, ensuring that the poloidal field magnet (19) is in the stable state of temporary connection with the toroidal field magnet, finally removing the hydraulic hoists, installing the remaining bolts, and completely fixing the poloidal field magnet (19) on the toroidal field magnet.

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