Device and method for testing steady state of Tokamak inner cold shield

Abstract

The invention discloses a tokamak inner cold shield steady state test device and method, the tokamak inner cold shield steady state test device comprises a test box and an inner cold shield arranged in the test box, and the bottom of an inner cavity of the test box is provided with a movable base. According to the Tokamak inner cold screen steady state test device and method, the inner cold screen is supported through the bearing assembly, the inner cold screen is transferred into the test box under the arrangement of the movable base, the accurate positioning of the inner cold screen is realized in cooperation with the matched arrangement of the steering driving assembly and the positioning assembly, and the steady state of the inner cold screen is tested in cooperation with the arrangement of the end face plugging assembly. The inner cold screen opening end face is plugged, vacuum helium leak detection of the inner cold screen can be carried out, operation is simple and convenient, meanwhile, efficient vacuum helium leak detection of the inner cold screen can be achieved, after a test is completed, the inner cold screen can be stably transferred to the outside of the test box, good adaptability is achieved, and meanwhile efficient and stable detection of the inner cold screen is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of internal cooling shield detection, and in particular to a device and method for steady-state testing of an internal cooling shield in a tokamak. Background Art

[0002] Tokamak is a toroidal container that uses magnetic confinement to achieve controlled nuclear fusion. The internal cooling screen in the tokamak device adopts a toroidal design. The conventional internal cooling screen is made of four steel plates welded together. There are many welds and high welding precision requirements. In order to ensure the stable use of the internal cooling screen, the welds need to be leak-tested with vacuum helium after the welding of the internal cooling screen is completed.

[0003] The existing vacuum helium leak detection method for the internal cooling shield is often to pre-make a sealing cover according to the type of the weld, and use a leak detection box sealing cover and a helium filling box sealing cover to seal the two sides of the weld for weld helium leak detection. This leak detection method has low detection efficiency and poor adaptability. Therefore, a device and method for steady-state testing of the internal cooling shield of a tokamak are proposed to achieve efficient leak detection of the internal cooling shield and have good adaptability. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a device and method for steady-state testing of a tokamak internal cooling shield, which solves the problems of low detection efficiency and poor adaptability of the existing vacuum helium leak detection method for the internal cooling shield.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A device for steady-state testing of an internal cold shield in a tokamak, comprising a test box and an internal cold shield arranged in the test box, a movable base is arranged at the bottom of the inner cavity of the test box, a receiving assembly is arranged on the top of the movable base, the internal cold shield is placed on the top of the receiving assembly, a positioning assembly is arranged on the top of the inner cavity of the test box, a steering drive assembly used in conjunction with the positioning assembly is also arranged on the top of the movable base, end face sealing assemblies are arranged on both the front and rear sides of the inner cavity of the test box, and the end face sealing assemblies are used in conjunction with the internal cold shield.

[0006] In order to realize the convenient transportation of the internal cooling screen, the present invention is further configured as follows: the mobile base comprises a hydraulic telescopic rod and a seat plate, the telescopic end of the hydraulic telescopic rod is fixedly installed with a sealing door, the seat plate is fixedly installed on one side of the sealing door, a slide groove is provided on the top of the seat plate, a slide plate is slidably installed inside the slide groove, first springs are fixedly installed on both sides of the slide plate, a pad plate and a vertical plate are fixedly installed on both sides of the bottom of the inner cavity of the slide groove, and the opposite ends of the two first springs are fixedly connected to the opposite sides of the pad plate and the vertical plate respectively; The hydraulic telescopic rod is fixedly installed at the bottom of the test box, the seat plate is slidably installed at the bottom of the inner cavity of the test box, and guide rails used in conjunction with the seat plate are fixedly installed on both the front and rear sides of the bottom of the inner cavity of the test box.

[0007] In order to achieve stable support for the inner cold screen, the present invention is further configured as follows: the receiving assembly includes two end receiving seats and a central support plate, the two end receiving seats are respectively arranged on both sides of the central support plate, the two end receiving seats and the front and rear sides of the central support plate are provided with slots, an insert plate is slidably installed inside the slot, and a second spring is fixedly connected between one side of the insert plate and one side of the inner cavity of the slot; The bottom of the end receiving seat is fixedly connected to two guide blocks, the top of the slide plate is provided with a guide groove used in conjunction with the guide blocks, and a fourth spring is fixedly connected between the bottom of the end receiving seat and the top of the slide plate.

[0008] In order to ensure the stability of the inner cold screen before and after the vacuum helium leak detection, the present invention is further configured as follows: the end receiving seat and the side opposite to the center support plate are respectively fixedly connected with a first tooth plate and a second tooth plate, a first tooth roller is arranged between the first tooth plate and the second tooth plate, and the first tooth roller is respectively meshed with the first tooth plate and the second tooth plate, and the front and rear sides of the first tooth roller are rotatably mounted with positioning plates, and the front and rear sides of the first tooth plate and the second tooth plate are respectively in sliding contact with the side opposite to the two positioning plates; The two positioning plates are both fixedly mounted on the top of the slide plate.

[0009] In order to achieve effective positioning of the inner cold screen, the present invention is further configured as follows: the positioning assembly includes a lifting plate, and the left and right sides of the front and rear sides of the bottom of the lifting plate are fixedly connected with positioning heads through two elastic telescopic parts, and the bottom of the positioning head is provided with a curved surface used in conjunction with the outer arc surface of the inner cold screen; A suspension rod is penetrated and slidably installed on all four sides of the top of the lifting plate, the top of the suspension rod is fixedly connected to the top of the inner cavity of the test box, and a fifth spring is sleeved on the outer periphery of the suspension rod, and the two ends of the fifth spring are respectively fixedly connected to the top of the inner cavity of the test box and the top of the lifting plate.

[0010] The present invention is further configured as follows: the steering drive assembly comprises a third tooth plate, a second tooth roller and two fourth tooth plates, the top of the third tooth plate is meshed with the bottom of the second tooth roller, and the two fourth tooth plates are meshed with one side of the second tooth roller; The third tooth plate is fixedly mounted on the top of the vertical plate, the two fourth tooth plates are respectively fixedly mounted on the front and rear sides of one side of the lifting plate, and the second tooth roller is rotatably mounted between the front and rear sides of the inner cavity of the test box; A sealing sleeve is fixedly installed on one side of the test box, and one end of the third tooth plate penetrates the test box and extends to the outside of the sealing sleeve.

[0011] In order to achieve the blocking of the opening of the inner cold screen, the present invention is further configured as follows: the end face blocking assembly includes two triangular blocking plates, the inclined surfaces of the triangular blocking plates are respectively used in conjunction with the two opening end faces of the inner cold screen, first wedge blocks are fixedly installed on both sides of the opposite sides of the two triangular blocking plates, and a second wedge block used in conjunction with the first wedge block is fixedly installed on the bottom of the lifting plate; A plurality of sixth springs are fixedly installed on the opposite sides of the two triangular sealing plates, and one end of the sixth spring is fixedly connected to one side of the inner cavity of the test box. Two positioning rods are fixedly installed on the front and rear sides of the inner cavity of the test box, and a blind hole for use with the positioning rod is opened on the surface of the first wedge block.

[0012] In order to avoid covering the weld and improve the test accuracy of the internal cold shield vacuum helium leak detection, the present invention is further configured as follows: a third wedge block is fixedly installed on the bottom of the two triangular sealing plates on the opposite side, a fourth wedge block is fixedly installed on the opposite side of the two guide blocks, and the third wedge block is used in conjunction with the fourth wedge block; Reinforcement plates are fixedly installed around the bottom of the lifting plate, and a U-shaped limit frame is sleeved and slidably installed on one side of the reinforcement plate. A third spring is fixedly connected between one side of the reinforcement plate and the inner cavity of the U-shaped limit frame, and the opposite sides of the two U-shaped limit frames arranged on the same side are in sliding contact with the opposite sides of the two first wedge blocks arranged on the same side.

[0013] The present invention is further configured as follows: the top of the test box is connected to a vacuum tube, and the top of the test box is also fixedly connected to a leak detector; One side of the triangular sealing plate is connected to a helium hose, one end of which passes through the test box and extends to the outside of the test box.

[0014] The present invention provides a device and method for steady-state testing of a cold shield in a tokamak, which has the following beneficial effects: (1) The present invention supports the inner cold screen by means of a receiving assembly. Under the setting of a movable base, the inner cold screen is transferred to a test box. The inner cold screen is precisely positioned by means of a steering drive assembly and a positioning assembly. The end face sealing assembly is used to seal the open end face of the inner cold screen. Thus, the inner cold screen can be tested for vacuum helium leaks. The operation is simple and convenient, and efficient vacuum helium leak testing of the inner cold screen can be achieved. After the test is completed, the inner cold screen can be stably transferred to the outside of the test box. The invention has good adaptability and can achieve efficient and stable testing of the inner cold screen.

[0015] (2) The present invention realizes three-stage support for the inner cold screen through the cooperation of the first tooth plate, the first tooth roller, the second tooth plate and the positioning plate through the two end receiving seats and the center support plate, and realizes stable support for the inner cold screen by coordinating with the setting of the plug plate. When the open end face of the inner cold screen is sealed, the center support plate lifts up the inner cold screen through the cooperation of the third wedge block and the fourth wedge block, so as to avoid covering the weld of the inner cold screen by the end receiving seat and provide convenient conditions for the expansion of the plug plate in the end receiving seat, so as to ensure that after the inner cold screen completes the vacuum helium leak detection, the plug plate on the end receiving seat stably supports the inner cold screen, and provides a guarantee for the inner cold screen to stably detach from the test box.

[0016] (3) The present invention adopts the setting of the steering drive assembly. When the mobile base conveys the internal cooling screen to the inside of the test box, the movement of the seat plate is used to realize the lowering of the lifting plate to drive the positioning head, thereby providing convenient support for the positioning of the internal cooling screen by the positioning head. When the lifting plate descends, the cooperation of the first wedge block and the second wedge block is used to realize the movement and drive of the two triangular sealing plates, thereby providing convenient conditions for sealing the two open end faces of the internal cooling screen after positioning. By using the hydraulic telescopic rod as a single power source, the positioning and sealing of the internal cooling screen can be realized, thereby providing effective support for the efficient vacuum helium leak detection of the internal cooling screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the external structure of the present invention in a test state; Figure 2 It is a schematic diagram of the internal structure of the test box in the test state of the present invention; Figure 3 It is a schematic diagram of the connection of the internal cooling screen, the movable base, the receiving assembly and the positioning assembly structure in the test state of the present invention; Figure 4 This is a schematic diagram of the external structure of the mobile base of the present invention when it is in an unfolded state; Figure 5 It is a schematic diagram of the connection between the test box, the hydraulic telescopic rod, the seat plate and the sealing door structure of the present invention; Figure 6 It is a schematic diagram of the connection between the internal cooling shield and the plug-in plate structure under the test state of the present invention; Figure 7 It is a structural schematic diagram of the positioning assembly of the present invention; Figure 8 It is a schematic diagram of the connection of the internal cooling screen, the receiving assembly, the positioning assembly and the end face plugging assembly structure in the test state of the present invention; Fig. 9 It is a schematic diagram of the connection between the positioning assembly and the end face plugging assembly structure of the present invention; Fig.10 It is a schematic diagram of the connection between the positioning assembly, the fourth tooth plate and the second wedge block structure of the present invention; Fig.11It is a structural schematic diagram of the steering drive assembly of the present invention; Fig.12 It is a structural schematic diagram of the end face plugging assembly of the present invention; Fig.13 It is a structural schematic diagram of the receiving assembly and the slide plate of the present invention; Fig.14 It is a structural schematic diagram of the receiving assembly of the present invention; Fig.15 It is a schematic diagram of the connection of the end receiving seat, the guide block, the fourth spring, the fourth wedge block, the triangular blocking plate and the third wedge block structure of the present invention; Fig.16 It is a schematic structural diagram of the internal cooling screen of the present invention.

[0018] In the figure: 1. Test box; 101. Vacuum tube; 102. Leak detector; 2. Internal cooling screen; 3. Mobile base; 301. Hydraulic telescopic rod; 302. Seat plate; 303. Sealed door; 304. Slide groove; 305. Slide plate; 306. First spring; 307. Pad plate; 308. Vertical plate; 309. Guide rail; 4. Receiver assembly; 401. End receiving seat; 402. Center support plate; 403. Slot; 404. Insert plate; 405. Second spring; 406. Guide block; 407. Guide groove; 408. Fourth spring; 409. First tooth plate; 4010. Second tooth plate; 4011. First tooth roller; 4012. Positioning plate; 4013. Fourth wedge block; 5. Positioning assembly; 501. Lifting plate; 502. Elastic expansion member; 503. Positioning head; 504. Curved surface; 505. Suspension rod; 506. Fifth spring; 507. Reinforcement plate; 508. U-shaped limit frame; 509. Third spring; 6. Steering drive assembly; 601. third tooth plate; 602. second tooth roller; 603. fourth tooth plate; 604. sealing sleeve; 7. End face plugging assembly; 701. Triangular plugging plate; 702. First wedge block; 703. Second wedge block; 704. Helium hose; 705. Sixth spring; 706. Positioning rod; 707. Blind hole; 708. Third wedge block. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] See also Figure 1-16 , the embodiment of the present invention provides the following technical solutions: Embodiment 1: A device for steady-state testing of an internal cooling shield of a tokamak is used for performing vacuum helium leak detection on an internal cooling shield 2, and specifically comprises a test box 1, a movable base 3, a receiving assembly 4, a positioning assembly 5, a steering drive assembly 6 and an end face plugging assembly 7. A vacuum tube 101 is connected to the top of the test box 1. The vacuum tube 101 is connected to an external vacuum pump and is used to extract air from the inside of the test box 1 to create a vacuum environment. In order to facilitate helium leak detection, a leak detector 102 is also fixedly connected to the top of the test box 1. The collection end of the leak detector 102 is connected to the inside of the test box 1. The leak detector 102 can be a helium mass spectrometer commonly available on the market.

[0021] As a preferred solution, in order to achieve effective support for the internal cold screen 2, the receiving assembly 4 includes two end receiving seats 401 and a center support plate 402. The two end receiving seats 401 are respectively arranged on both sides of the center support plate 402. Slots 403 are provided on the front and rear sides of the two end receiving seats 401 and the center support plate 402. An insert plate 404 is slidably installed inside the slot 403. A second spring 405 is fixedly connected between one side of the insert plate 404 and one side of the inner cavity of the slot 403. As long as the internal cold screen 2 is placed on the insert plate 404, stable support for the internal cold screen 2 can be achieved.

[0022] Further explanation, in order to realize the convenient entry and exit of the internal cold screen 2 relative to the test box 1, the mobile base 3 includes a hydraulic telescopic rod 301 and a seat plate 302, the hydraulic telescopic rod 301 is fixedly installed at the bottom of the test box 1, and the telescopic end of the hydraulic telescopic rod 301 is fixedly installed with a sealed door 303, and the seat plate 302 is slidably installed at the bottom of the inner cavity of the test box 1. The front and rear sides of the bottom of the inner cavity of the test box 1 are fixedly installed with guide rails 309 used in conjunction with the seat plate 302, and the seat plate 302 is fixedly installed on one side of the sealed door 303. A slide groove 304 is provided on the top of the seat plate 302, and a slide plate 305 is slidably installed inside the slide groove 304. Specifically, a plurality of groups of rollers are rotatably installed at the bottom of the slide plate 305, and first springs 306 are fixedly installed on both sides of the slide plate 305. Pads 307 and vertical plates 308 are fixedly installed on both sides of the bottom of the inner cavity of the slide groove 304, and the opposite ends of the two first springs 306 are fixedly connected to the opposite sides of the pad plate 307 and the vertical plate 308, respectively. Two guide blocks 406 are fixedly connected to the bottom of the end receiving seat 401 , a guide groove 407 for use with the guide blocks 406 is provided on the top of the slide plate 305 , and a fourth spring 408 is fixedly connected between the bottom of the end receiving seat 401 and the top of the slide plate 305 .

[0023] As a preferred solution, in order to achieve coordinated and stable support of the inner cold screen 2 by the end receiving seat 401 and the center support plate 402, the first tooth plate 409 and the second tooth plate 4010 are fixedly connected to the opposite sides of the end receiving seat 401 and the center support plate 402, respectively, a first tooth roller 4011 is arranged between the first tooth plate 409 and the second tooth plate 4010, and the first tooth roller 4011 is respectively meshed with the first tooth plate 409 and the second tooth plate 4010, and the front and rear sides of the first tooth roller 4011 are rotatably installed with positioning plates 4012, the two positioning plates 4012 are fixedly installed on the top of the slide plate 305, and the front and rear sides of the first tooth plate 409 and the second tooth plate 4010 are respectively in sliding contact with the opposite side of the two positioning plates 4012.

[0024] Among them, under the action of gravity of the internal cooling screen 2, the end receiving seat 401 and the central support plate 402 stably lift the bottom of the internal cooling screen 2, and cooperate with the plug plate 404 thereon to achieve stable support for the internal cooling screen 2, thereby facilitating the convenient movement of the internal cooling screen 2 along with the seat plate 302.

[0025] As a preferred solution, in order to further position the inner cold screen 2, the positioning assembly 5 includes a lifting plate 501, and the left and right sides of the front and rear sides of the bottom of the lifting plate 501 are fixedly connected with positioning heads 503 through two elastic telescopic members 502. The elastic telescopic member 502 is a sleeve-rod structure with a built-in spring, and has good telescopic performance. The bottom of the positioning head 503 is provided with a curved surface 504 used in conjunction with the outer arc surface of the inner cold screen 2. The top of the lifting plate 501 is penetrated and slidably installed with a suspension rod 505. The top of the suspension rod 505 is fixedly connected to the top of the inner cavity of the test box 1. The outer periphery of the suspension rod 505 is sleeved with a fifth spring 506. The two ends of the fifth spring 506 are respectively fixedly connected to the top of the inner cavity of the test box 1 and the top of the lifting plate 501. The elastic telescopic member 502 is squeezed by the descent of the lifting plate 501, so that the curved surface 504 fits on the outer arc surface of the inner cold screen 2. The arrangement of four groups of positioning heads 503 can achieve horizontal limitation of the inner cold screen 2.

[0026] As a preferred solution, in order to realize the automatic descent positioning of the positioning head 503, the steering drive assembly 6 includes a third tooth plate 601, a second tooth roller 602 and two fourth tooth plates 603. The top of the third tooth plate 601 is meshed with the bottom of the second tooth roller 602, and the two fourth tooth plates 603 are meshed with one side of the second tooth roller 602. The third tooth plate 601 is fixedly installed on the top of the vertical plate 308, and the two fourth tooth plates 603 are respectively fixedly installed on the front and rear sides of one side of the lifting plate 501. The second tooth roller 602 is rotatably installed between the front and rear sides of the inner cavity of the test box 1. In order to ensure the sealing effect of the test box 1 and to facilitate the construction of a vacuum environment, a sealing sleeve 604 is fixedly installed on one side of the test box 1, and one end of the third tooth plate 601 passes through the test box 1 and extends to the outside of the sealing sleeve 604.

[0027] As a preferred solution, in order to achieve the sealing of the open end face of the inner cooling screen 2, the end face sealing assembly 7 includes two triangular sealing plates 701, the inclined surfaces of the triangular sealing plates 701 are respectively used in conjunction with the two open end faces of the inner cooling screen 2, and the two sides of the two triangular sealing plates 701 on the opposite sides are fixedly installed with first wedge blocks 702, and the bottom of the lifting plate 501 is fixedly installed with a second wedge block 703 used in conjunction with the first wedge block 702. One side of a triangular sealing plate 701 is connected to a helium hose 704, and one end of the helium hose 704 passes through the test box 1 and extends to the outside of the test box 1. As a detailed description, one end of the helium hose 704 is connected to an external helium bottle through a three-way pipe, and a gas supply valve is provided in the connecting section. The other end of the three-way pipe is connected to a vacuum pump, and a gas extraction valve is provided in the connecting section, so that the introduction and extraction of helium can be achieved through a helium hose 704.

[0028] In order to facilitate the automatic resetting of the triangular sealing plate 701, a plurality of sixth springs 705 are fixedly installed on the opposite sides of the two triangular sealing plates 701, and one end of the sixth spring 705 is fixedly connected to one side of the inner cavity of the test box 1. In order to ensure the stability of the horizontal position of the triangular sealing plate 701, two positioning rods 706 are fixedly installed on the front and rear sides of the inner cavity of the test box 1, and a blind hole 707 used in conjunction with the positioning rod 706 is opened on the surface of the first wedge block 702.

[0029] As a preferred solution, in order to further ensure the stability of the position of the triangular sealing plate 701, reinforcement plates 507 are fixedly installed on all four sides of the bottom of the lifting plate 501, and a U-shaped limit frame 508 is sleeved and slidably installed on one side of the reinforcement plate 507. A third spring 509 is fixedly connected between one side of the reinforcement plate 507 and the inner cavity of the U-shaped limit frame 508, and the opposite sides of the two U-shaped limit frames 508 arranged on the same side are in sliding contact with the opposite sides of the two first wedge blocks 702 arranged on the same side.

[0030] In this embodiment, efficient and rapid vacuum helium leak detection of the internal cooling shield 2 is achieved, and the operation is simple and has good adaptability.

[0031] Embodiment 2. This embodiment is an improvement of the previous embodiment, a device for steady-state testing of a tokamak internal cooling shield, wherein third wedge blocks 708 are fixedly installed at the bottom of opposite sides of two triangular sealing plates 701, and fourth wedge blocks 4013 are fixedly installed on opposite sides of two guide blocks 406, and the third wedge blocks 708 and the fourth wedge blocks 4013 are used in combination.

[0032] The advantage of the second embodiment over the first embodiment is that when the open end face of the inner cold screen 2 is sealed, the end receiving seat 401 is separated from the inner cold screen 2 by the cooperation of the third wedge block 708 and the fourth wedge block 4013 to avoid obstruction of the weld. At the same time, after the vacuum helium leak detection of the inner cold screen 2 is completed, the plug plate 404 on the end receiving seat 401 can be effectively unfolded to achieve effective support for the inner cold screen 2, thereby providing stability for the inner cold screen 2 to be separated from the test box 1.

[0033] The method for using the device for steady-state testing of a cold shield in a tokamak specifically comprises the following steps: S1, control the hydraulic telescopic rod 301 to extend, the hydraulic telescopic rod 301 drives the sealing door 303 to make the seat plate 302 slide along the guide rail 309 to the outside of the test box 1, and hoist the internal cold shield 2 to the two end receiving seats 401, the end receiving seats 401 squeeze the fourth spring 408, the end receiving seats 401 drive the first tooth plate 409 to move downward, the first tooth plate 409 drives the first tooth roller 4011 to rotate, the first tooth roller 4011 drives the second tooth plate 4010 to move upward, the second tooth plate 4010 drives the center support plate 402 upward to contact the bottom of the outer arc surface of the internal cold shield 2, and under the support force of the plug plate 404, the internal cold shield 2 remains in a stable state; S2, control the hydraulic telescopic rod 301 to contract, so that the seat plate 302 drives the slide plate 305 to make the inner cold screen 2 enter the inside of the test box 1, and after the highest point of the inner cold screen 2 enters between the positioning heads 503 on the left and right sides, as the seat plate 302 continues to move, the third tooth plate 601 contacts the second tooth roller 602 and drives the second tooth roller 602 to rotate, and the second tooth roller 602 drives the fourth tooth plate 603 to move downward, and the fourth tooth plate 603 drives the lifting plate 501 to move downward, and the lifting plate 501 stretches the fifth spring 506 and squeezes the elastic telescopic member 502 downward, and the elastic telescopic member 502 squeezes the positioning head 503, so that the curved surface 504 of the positioning head 503 fits with the outer arc surface of the inner cold screen 2, and the horizontal limit of the inner cold screen 2 is completed; During the process, the positioning head 503 is pressed by the elastic telescopic member 502 to be in closer contact with the inner cooling screen 2, wherein the slide plate 305 slides in the slide groove 304, stretching one first spring 306 and pressing another first spring; S3, when the lifting plate 501 descends, the lifting plate 501 drives the second wedge block 703 to press the first wedge block 702 downward, and the first wedge block 702 presses the triangular blocking plate 701, so that the triangular blocking plate 701 approaches and contacts the open end face of the inner cold screen 2. During the process, the extrusion plug plate 404 compresses the second spring 405, so that the plug plate 404 sinks into the slot 403, until the open end face of the inner cold screen 2 is blocked; During the blocking process, the triangular blocking plate 701 drives the third wedge block 708 to squeeze the fourth wedge block 4013, the fourth wedge block 4013) drives the guide block 406 to move downward, the guide block 406 drives the end receiving seat 401 to squeeze the fourth spring 408 downward, the end receiving seat 401 drives the first tooth plate 409 to move downward, the first tooth plate 409 drives the first tooth roller 4011 to rotate, the first tooth roller 4011 drives the second tooth plate 4010 to move upward, the second tooth plate 4010 drives the center support plate 402 to squeeze the inner cold screen 2 upward, and the end receiving seat 401 is separated from the inner cold screen 2; S4, when the plugging of the open end face of the inner cold screen 2 is completed, the sealing door 303 completes the plugging of the test box 1, and the air in the test box 1 is extracted through the vacuum tube 101 to keep the test box 1 in a vacuum state, and then helium is injected into the sealed inner cold screen 2 through the helium hose 704. When the helium passes through the weld of the inner cold screen 2, the leak detector 102 detects the helium and issues a leak alarm. When the helium does not pass through the weld of the inner cold screen 2, the leak detector 102 cannot detect the helium and will not issue a leak alarm. The helium is extracted to complete the weld detection of the inner cold screen 2. S5, control the hydraulic telescopic rod 301 to extend, the hydraulic telescopic rod 301 drives the sealing door 303 to make the seat plate 302 slide along the guide rail 309 to the outside of the test box 1, the third tooth plate 601 drives the fourth tooth plate 603 to drive the lifting plate 501 to move upward through the second tooth roller 602, so that the positioning head 503 is separated from the inner cold screen 2. During the process, the inner cold screen 2 is horizontally limited by the two positioning heads 503, the slide plate 305 slides in the slide groove 304, one first spring 306 is reset and squeezed, and the other first spring 306 is reset and gradually stretched. When the positioning head 503 is completely separated from the inner cold screen 2, the third tooth plate 601 is separated from the second tooth roller 602, and the slide plate 305 drives the inner cold screen 2 to move to the outside of the test box 1; During the upward movement of the lifting plate 501, the second wedge block 703 gradually separates from the first wedge block 702. As the sixth spring 705 is reset, the triangular blocking plate 701 gradually separates from the inner cold screen 2. During the process, the triangular blocking plate 701 drives the third wedge block 708 to separate from the fourth wedge block 4013. The inner cold screen 2 squeezes the central support plate 402 to make the second tooth plate 4010 descend. The second tooth plate 4010 drives the first tooth plate 409 to rise through the first tooth roller 4011 until the inner cold screen 2 falls on the end receiving seat 401 and the plug plate 404 thereon. Then, as the seat plate 302 continues to move, the inner cold screen 2 moves out of the test box 1. S6. The tested internal cooling screen 2 is hoisted and unloaded, the fourth spring 408 is reset, pushing the end receiving seat 401 to rise and reset, the second spring 405 in the center support plate 402 pushes the plug plate 404 to reset, and the two first springs 306 push the slide plate 305 to reset.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for steady-state testing of a tokamak internal cooling shield, comprising a test box (1) and an internal cooling shield (2) arranged in the test box (1), characterized in that: A movable base (3) is arranged at the bottom of the inner cavity of the test box (1), a receiving assembly (4) is arranged at the top of the movable base (3), the inner cooling screen (2) is placed on the top of the receiving assembly (4), a positioning assembly (5) is arranged at the top of the inner cavity of the test box (1), a steering drive assembly (6) used in conjunction with the positioning assembly (5) is also arranged at the top of the movable base (3), and end face plugging assemblies (7) are arranged on both the front and rear sides of the inner cavity of the test box (1), and the end face plugging assemblies (7) are used in conjunction with the inner cooling screen (2); The receiving assembly (4) comprises two end receiving seats (401) and a central support plate (402), the two end receiving seats (401) being respectively arranged on both sides of the central support plate (402), the two end receiving seats (401) and the central support plate (402) being provided with slots (403) on both the front and rear sides, the slots (403) being slidably provided with plug plates (404), and a second spring (405) being fixedly connected between one side of the plug plate (404) and one side of the inner cavity of the slot (403); The top of the test box (1) is connected to a vacuum tube (101), and the top of the test box (1) is also fixedly connected to a leak detector (102); One side of one of the end face sealing components (7) is connected to a helium hose (704).

2. The device for steady-state testing of a cold shield in a tokamak according to claim 1, characterized in that: The mobile base (3) comprises a hydraulic telescopic rod (301) and a seat plate (302), the telescopic end of the hydraulic telescopic rod (301) being fixedly mounted with a sealing door (303), the seat plate (302) being fixedly mounted on one side of the sealing door (303), a slide groove (304) being provided on the top of the seat plate (302), a slide plate (305) being slidably mounted inside the slide groove (304), first springs (306) being fixedly mounted on both sides of the slide plate (305), a pad (307) and a vertical plate (308) being fixedly mounted on both sides of the bottom of the inner cavity of the slide groove (304), and opposite ends of the two first springs (306) being fixedly connected to opposite sides of the pad (307) and the vertical plate (308); The hydraulic telescopic rod (301) is fixedly mounted on the bottom of the test box (1), the seat plate (302) is slidably mounted on the bottom of the inner cavity of the test box (1), and guide rails (309) for use with the seat plate (302) are fixedly mounted on both the front and rear sides of the bottom of the inner cavity of the test box (1).

3. The device for steady-state testing of a cold shield in a tokamak according to claim 2, characterized in that: Two guide blocks (406) are fixedly connected to the bottom of the end receiving seat (401), a guide groove (407) for use with the guide blocks (406) is provided on the top of the slide plate (305), and a fourth spring (408) is fixedly connected between the bottom of the end receiving seat (401) and the top of the slide plate (305).

4. The device for steady-state testing of a cold shield in a tokamak according to claim 3, characterized in that: The end receiving seat (401) and the center support plate (402) are respectively fixedly connected to the first tooth plate (409) and the second tooth plate (4010) on the opposite side, a first tooth roller (4011) is arranged between the first tooth plate (409) and the second tooth plate (4010), and the first tooth roller (4011) is respectively meshed with the first tooth plate (409) and the second tooth plate (4010), and the first tooth roller (4011) is rotatably mounted with positioning plates (4012) on both the front and rear sides of the first tooth roller (4011), and the front and rear sides of the first tooth plate (409) and the second tooth plate (4010) are respectively in sliding contact with the opposite side of the two positioning plates (4012); The two positioning plates (4012) are both fixedly mounted on the top of the slide plate (305).

5. The device for steady-state testing of a cold shield in a tokamak according to claim 4, characterized in that: The positioning assembly (5) comprises a lifting plate (501), and the left and right sides of the bottom of the lifting plate (501) are fixedly connected to positioning heads (503) via two elastic telescopic parts (502); the bottom of the positioning head (503) is provided with a curved surface (504) for use with the outer curved surface of the inner cooling screen (2); A suspension rod (505) is penetrated and slidably mounted on all four sides of the top of the lifting plate (501); the top of the suspension rod (505) is fixedly connected to the top of the inner cavity of the test box (1); a fifth spring (506) is sleeved on the outer circumference of the suspension rod (505); and the two ends of the fifth spring (506) are respectively fixedly connected to the top of the inner cavity of the test box (1) and the top of the lifting plate (501).

6. The device for steady-state testing of a cold shield in a tokamak according to claim 5, characterized in that: The steering drive assembly (6) comprises a third toothed plate (601), a second toothed roller (602) and two fourth toothed plates (603), the top of the third toothed plate (601) meshingly cooperates with the bottom of the second toothed roller (602), and the two fourth toothed plates (603) both meshingly cooperate with one side of the second toothed roller (602); The third tooth plate (601) is fixedly mounted on the top of the vertical plate (308), the two fourth tooth plates (603) are respectively fixedly mounted on the front and rear sides of one side of the lifting plate (501), and the second tooth roller (602) is rotatably mounted between the front and rear sides of the inner cavity of the test box (1); A sealing sleeve (604) is fixedly mounted on one side of the test box (1), and one end of the third tooth plate (601) penetrates the test box (1) and extends to the outside of the sealing sleeve (604).

7. The device for steady-state testing of a cold shield in a tokamak according to claim 6, characterized in that: The end face plugging assembly (7) comprises two triangular plugging plates (701), the inclined surfaces of the triangular plugging plates (701) are respectively used in conjunction with the two open end faces of the inner cooling screen (2), first wedge blocks (702) are fixedly mounted on both sides of the two triangular plugging plates (701) on opposite sides, and a second wedge block (703) used in conjunction with the first wedge block (702) is fixedly mounted on the bottom of the lifting plate (501); A plurality of sixth springs (705) are fixedly mounted on opposite sides of the two triangular blocking plates (701), and one end of the sixth spring (705) is fixedly connected to one side of the inner cavity of the test box (1). Two positioning rods (706) are fixedly mounted on the front and rear sides of the inner cavity of the test box (1), and a blind hole (707) for use with the positioning rod (706) is provided on the surface of the first wedge block (702).

8. The device for steady-state testing of a cold shield in a tokamak according to claim 7, characterized in that: A third wedge block (708) is fixedly mounted on the bottom of the two triangular blocking plates (701) on one side opposite to the other, a fourth wedge block (4013) is fixedly mounted on the opposite side of the two guide blocks (406), and the third wedge block (708) and the fourth wedge block (4013) are used in coordination; Reinforcement plates (507) are fixedly installed around the bottom of the lifting plate (501), and a U-shaped limit frame (508) is sleeved and slidably installed on one side of the reinforcement plate (507). A third spring (509) is fixedly connected between one side of the reinforcement plate (507) and the inner cavity of the U-shaped limit frame (508), and the opposite sides of the two U-shaped limit frames (508) arranged on the same side are in sliding contact with the opposite sides of the two first wedge blocks (702) arranged on the same side.

9. The device for steady-state testing of a cold shield in a tokamak according to claim 8, characterized in that: One side of the triangular sealing plate (701) is connected to a helium hose (704), and one end of the helium hose (704) passes through the test box (1) and extends to the outside of the test box (1).

10. A method for using a device for steady-state testing of a cold shield inside a Tokamak, using the device for steady-state testing of a cold shield inside a Tokamak according to claim 9, characterized in that: The following steps are involved: S1, controlling the hydraulic telescopic rod (301) to extend, the hydraulic telescopic rod (301) drives the sealing door (303) to make the seat plate (302) slide along the guide rail (309) toward the outside of the test box (1), hoisting the inner cooling screen (2) onto the two end receiving seats (401), the end receiving seats (401) squeeze the fourth spring (408), the end receiving seats (401) drive the first tooth plate (409) to move downward, the first tooth plate (409) drives the first tooth roller (4011) to rotate, the first tooth roller (4011) drives the second tooth plate (4010) to move upward, the second tooth plate (4010) drives the center support plate (402) upward to contact the bottom of the outer arc surface of the inner cooling screen (2), and under the support force of the plug plate (404), the inner cooling screen (2) maintains a stable state; S2, controlling the hydraulic telescopic rod (301) to retract, so that the seat plate (302) drives the slide plate (305) to move the inner cooling screen (2) into the test box (1), and after the highest point of the inner cooling screen (2) enters between the positioning heads (503) on the left and right sides, as the seat plate (302) continues to move, the third tooth plate (601) contacts the second tooth roller (602) and drives the second tooth roller (602) to rotate, the second tooth roller (602) drives the fourth tooth plate (603) to move downward, the fourth tooth plate (603) drives the lifting plate (501) to move downward, the lifting plate (501) stretches the fifth spring (506) and presses the elastic telescopic member (502) downward, the elastic telescopic member (502) presses the positioning head (503), so that the curved surface (504) of the positioning head (503) fits with the outer arc surface of the inner cooling screen (2), and the horizontal position limiting of the inner cooling screen (2) is completed; During the process, the positioning head (503) is pressed by the elastic telescopic member (502) to come into closer contact with the inner cooling screen (2), wherein the slide plate (305) slides in the slide groove (304), stretching one first spring (306) and squeezing another first spring; S3. During the descent of the lifting plate (501), the lifting plate (501) drives the second wedge block (703) to press the first wedge block (702) downward, and the first wedge block (702) presses the triangular blocking plate (701), so that the triangular blocking plate (701) approaches and contacts the open end face of the inner cooling screen (2). During the process, the extrusion plug plate (404) compresses the second spring (405), so that the plug plate (404) is immersed in the slot (403), until the open end face of the inner cooling screen (2) is blocked; During the blocking process, the triangular blocking plate (701) drives the third wedge block (708) to squeeze the fourth wedge block (4013), the fourth wedge block (4013) drives the guide block (406) to move downward, the guide block (406) drives the end receiving seat (401) to squeeze the fourth spring (408) downward, the end receiving seat (401) drives the first tooth plate (409) to move downward, the first tooth plate (409) drives the first tooth roller (4011) to rotate, the first tooth roller (4011) drives the second tooth plate (4010) to move upward, the second tooth plate (4010) drives the center support plate (402) to squeeze the inner cooling screen (2) upward, and the end receiving seat (401) and the inner cooling screen (2) are separated; S4, when the sealing of the open end face of the inner cold screen (2) is completed, the sealing door (303) completes the sealing of the test box (1), the air in the test box (1) is extracted through the vacuum tube (101), and after the test box (1) is kept in a vacuum state, helium is injected into the sealed inner cold screen (2) through the helium hose (704), and when the helium passes through the weld of the inner cold screen (2), the leak detector (102) detects the helium and issues a leak alarm, and when the helium does not pass through the weld of the inner cold screen (2), the leak detector (102) cannot detect the helium and does not issue a leak alarm, and the helium is extracted to complete the weld inspection of the inner cold screen (2); S5, controlling the hydraulic telescopic rod (301) to extend, the hydraulic telescopic rod (301) drives the sealing door (303) to slide the seat plate (302) along the guide rail (309) toward the outside of the test box (1), the third tooth plate (601) drives the fourth tooth plate (603) to drive the lifting plate (501) to move upward through the second tooth roller (602), so that the positioning head (503) is separated from the inner cooling screen (2). During the process, the inner cooling screen (2) is horizontally limited by the two positioning heads (503), the slide plate (305) slides in the slide groove (304), one first spring (306) is reset and squeezed, and the other first spring (306) is reset and gradually stretched. When the positioning head (503) is completely separated from the inner cooling screen (2), the third tooth plate (601) is separated from the second tooth roller (602), and the slide plate (305) drives the inner cooling screen (2) to move toward the outside of the test box (1); During the upward movement of the lifting plate (501), the second wedge block (703) gradually separates from the first wedge block (702), and as the sixth spring (705) is reset, the triangular blocking plate (701) gradually separates from the inner cooling screen (2). During the process, the triangular blocking plate (701) drives the third wedge block (708) to separate from the fourth wedge block (4013), and the inner cooling screen (2) squeezes the central support plate (402) to make the second tooth plate (4010) descend, and the second tooth plate (4010) drives the first tooth plate (409) to rise through the first tooth roller (4011), until the inner cooling screen (2) falls on the end receiving seat (401) and the plug plate (404) thereon, and then as the seat plate (302) continues to move, the inner cooling screen (2) moves out of the test box (1); S6. The tested internal cooling screen (2) is hoisted and unloaded, the fourth spring (408) is reset, pushing the end receiving seat (401) to rise and reset, the second spring (405) in the center support plate (402) pushes the plug plate (404) to reset, and the two first springs (306) push the slide plate (305) to reset.

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