Device and method for steady-state testing of an in-vessel cryopanel in a tokamak

Abstract

The present invention discloses a device and method for steady-state testing of a tokamak internal cold screen, including a test box and an internal cold screen arranged in the test box, wherein a movable base is arranged at the bottom of the inner cavity of the test box, and the present invention relates to the field of internal cold screen detection technology. The device and method for steady-state testing of a tokamak internal cold screen supports the internal cold screen through a receiving component, and under the setting of the movable base, the internal cold screen is transferred to the test box, and the internal cold screen is precisely positioned by cooperating with the steering drive component and the positioning component, and the end face plugging component is arranged to plug the open end face of the internal cold screen, so that vacuum helium leak detection of the internal cold screen can be performed, and the operation is simple and convenient, and efficient vacuum helium leak detection of the internal cold screen can be realized, and after the test is completed, the internal cold screen can also be stably transferred to the outside of the test box, and the internal cold screen has good adaptability and efficient and stable detection of the internal cold screen can be realized.

Description

Technical Field

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

[0002] A tokamak is an annular container that uses magnetic confinement to achieve controlled nuclear fusion. The internal cooling screen in a tokamak device adopts an annular design. A conventional internal cooling screen is made by welding four steel plates, with a large number of welds and high welding precision requirements. To ensure the stable use of the internal cooling screen, after the welding of the internal cooling screen is completed, vacuum helium leak detection needs to be carried out on the welds.

[0003] The existing vacuum helium leak detection method for internal cooling screens often prefabricates a sealing cover according to the type of weld, uses a leak detection box sealing cover and a helium filling box sealing cover to seal both sides of the weld respectively 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 a tokamak internal cooling screen are specifically proposed to achieve high-efficiency leak detection of the internal cooling screen and have good adaptability. Summary of the Invention

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

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A device for steady-state testing of a tokamak internal cooling screen includes a test chamber and an internal cooling screen disposed in the test chamber. A moving base is provided at the bottom of the inner cavity of the test chamber. A receiving assembly is provided on the top of the moving base. The internal cooling screen is placed on the top of the receiving assembly. A positioning assembly is provided at the top of the inner cavity of the test chamber. A steering drive assembly cooperating with the positioning assembly is also provided on the top of the moving base. End face plugging assemblies are provided on both the front and rear sides of the inner cavity of the test chamber, and the end face plugging assemblies cooperate with the internal cooling screen.

[0006] To facilitate the transfer of the internal cooling screen, the present invention is further configured as: The moving base includes a hydraulic telescopic rod and a seat plate. A sealing door is fixedly installed at the telescopic end of the hydraulic telescopic rod. The seat plate is fixedly installed on one side of the sealing door. A chute is provided on the top of the seat plate. A sliding plate is slidably installed inside the chute. First springs are fixedly installed on both sides of the sliding plate. On both sides of the bottom of the inner cavity of the chute, a backing plate and a vertical plate are respectively fixedly installed, and the opposite ends of the two first springs are fixedly connected to the opposite sides of the backing plate and the vertical plate respectively;

[0007] 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. Guide rails that cooperate 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.

[0008] 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. Slots are opened on the front, rear, left, and right sides of the two end receiving seats and the central support plate. Plug plates are slidably installed inside the slots. A second spring is fixedly connected between one side of the plug plate and one side of the inner cavity of the slot.

[0009] Two guide blocks are fixedly connected to the bottom of the end receiving seat. Guide grooves that cooperate with the guide blocks are opened on the top of the sliding plate. A fourth spring is fixedly connected between the bottom of the end receiving seat and the top of the sliding plate.

[0010] To ensure the stability of the inner cold screen before and after vacuum helium leak detection, the present invention is further configured as follows: First toothed plates and second toothed plates are respectively fixedly connected to the opposite sides of the end receiving seat and the central support plate. A first toothed roller is arranged between the first toothed plate and the second toothed plate, and the first toothed roller is respectively meshed and cooperated with the first toothed plate and the second toothed plate. Positioning plates are rotatably installed on both the front and rear sides of the first toothed roller, and the front and rear sides of the first toothed plate and the second toothed plate are respectively in sliding contact with the opposite sides of the two positioning plates.

[0011] Both of the two positioning plates are fixedly installed on the top of the sliding plate.

[0012] To achieve effective positioning of the inner cold screen, the present invention is further configured as follows: The positioning assembly includes a lifting plate. Elastic telescopic members are fixedly connected to the left and right sides of the front and rear sides of the bottom of the lifting plate to form positioning heads. A curved surface that cooperates with the outer arc surface of the inner cold screen is opened at the bottom of the positioning head.

[0013] Suspension rods penetrate through and are slidably installed around the top of the lifting plate. The top ends of the suspension rods are fixedly connected to the top of the inner cavity of the test box. A fifth spring is sleeved on the outer periphery of the suspension rod. 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.

[0014] The present invention is further configured as follows: The steering drive assembly includes a third toothed plate, a second toothed roller, and two fourth toothed plates. The top of the third toothed plate is meshed and cooperated with the bottom of the second toothed roller. Both of the two fourth toothed plates are meshed and cooperated with one side of the second toothed roller.

[0015] The third toothed plate is fixedly installed at the top of the vertical plate, and the two fourth toothed plates are respectively fixedly installed on the front and rear sides of one side of the lifting plate. The second toothed roller is rotatably installed between the front and rear sides of the inner cavity of the test box;

[0016] A sealing sleeve is fixedly installed on one side of the test box, and one end of the third toothed plate penetrates through the test box and extends to the outside of the sealing sleeve.

[0017] In order to realize the opening plugging of the internal cooling screen, the present invention is further arranged as follows: The end face plugging assembly includes two triangular plugging plates. The inclined surfaces of the triangular plugging plates are respectively used in cooperation with the two opening end faces of the internal cooling screen. On both sides of the opposite sides of the two triangular plugging plates, first wedge-shaped blocks are fixedly installed. A second wedge-shaped block used in cooperation with the first wedge-shaped block is fixedly installed at the bottom of the lifting plate;

[0018] On the opposite sides of the two triangular plugging plates, a number of sixth springs are fixedly installed, 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. Blind holes used in cooperation with the positioning rods are formed on the surface of the first wedge-shaped block.

[0019] In order to avoid covering the weld seam and improve the test accuracy of the internal cooling screen vacuum helium leak detection, the present invention is further arranged as follows: Third wedge-shaped blocks are fixedly installed at the bottoms of the opposite sides of the two triangular plugging plates. Fourth wedge-shaped blocks are fixedly installed on the opposite sides of the two guiding blocks, and the third wedge-shaped block is used in cooperation with the fourth wedge-shaped block;

[0020] Reinforcing plates are fixedly installed around the bottom of the lifting plate. A U-shaped limiting frame is sleeved and slidably installed on one side of the reinforcing plate. A third spring is fixedly connected between one side of the reinforcing plate and the inner cavity of the U-shaped limiting frame. The opposite sides of the two U-shaped limiting frames arranged on the same side are respectively in sliding contact with the opposite sides of the two first wedge-shaped blocks arranged on the same side.

[0021] The present invention is further arranged as follows: A vacuum pumping pipe is communicated with the top of the test box, and a leak detector is also fixedly connected to the top of the test box;

[0022] A helium gas hose is communicated with one side of one of the triangular plugging plates. One end of the helium gas hose penetrates through the test box and extends to the outside of the test box.

[0023] The present invention provides a device and method for steady-state testing of the internal cooling screen of a tokamak. It has the following beneficial effects:

[0024] (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.

[0025] (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.

[0026] (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

[0027] Figure 1 It is a schematic diagram of the external structure of the present invention in a test state;

[0028] Figure 2 It is a schematic diagram of the internal structure of the test box in the test state of the present invention;

[0029] 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;

[0030] 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;

[0031] 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;

[0032] Figure 6 Schematic diagram of the connection between the internal cooling screen and the plug board structure under the test state of the present invention;

[0033] Figure 7 Schematic diagram of the structure of the positioning component of the present invention;

[0034] Figure 8 Schematic diagram of the connection between the internal cooling screen, the receiving component, the positioning component and the end face plugging component structures under the test state of the present invention;

[0035] Figure 9 Schematic diagram of the connection between the positioning component and the end face plugging component structures of the present invention;

[0036] Figure 10 Schematic diagram of the connection between the positioning component, the fourth tooth plate and the second wedge block structures of the present invention;

[0037] Figure 11 Schematic diagram of the structure of the steering drive component of the present invention;

[0038] Figure 12 Schematic diagram of the structure of the end face plugging component of the present invention;

[0039] Figure 13 Schematic diagram of the connection between the receiving component and the sliding plate of the present invention;

[0040] Figure 14 Schematic diagram of the structure of the receiving component of the present invention;

[0041] Figure 15 Schematic diagram of the connection between the end receiving seat, the guide block, the fourth spring, the fourth wedge block, the triangular plugging plate and the third wedge block structures of the present invention;

[0042] Figure 16 Schematic diagram of the structure of the internal cooling screen of the present invention.

[0043] In the figure:

[0044] 1. Test chamber; 101. Vacuum extraction pipe; 102. Leak detector;

[0045] 2. Internal cooling screen;

[0046] 3. Moving base; 301. Hydraulic telescopic rod; 302. Seat plate; 303. Sealed door; 304. Chute; 305. Sliding plate; 306. First spring; 307. Lining plate; 308. Vertical plate; 309. Guide rail;

[0047] 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;

[0048] 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;

[0049] 6. Steering drive assembly; 601. third tooth plate; 602. second tooth roller; 603. fourth tooth plate; 604. sealing sleeve;

[0050] 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

[0051] 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.

[0052] See also Figure 1-16 , the embodiment of the present invention provides the following technical solutions:

[0053] 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.

[0054] As a preferred solution, in order to effectively support the inner cooling screen 2, the receiving component 4 includes two end receiving seats 401 and a central support plate 402. The two end receiving seats 401 are respectively arranged on both sides of the central support plate 402. Slots 403 are provided on the front and rear sides of the two end receiving seats 401 and the central support plate 402. An insertion plate 404 is slidably installed inside the slot 403. A second spring 405 is fixedly connected between one side of the insertion plate 404 and one side of the inner cavity of the slot 403. As long as the inner cooling screen 2 is placed on the insertion plate 404, stable support for the inner cooling screen 2 can be achieved.

[0055] Furthermore, in order to facilitate the entry and exit of the inner cooling screen 2 relative to the test chamber 1, the moving 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 chamber 1. The telescopic end of the hydraulic telescopic rod 301 is fixedly installed with a sealing door 303. The seat plate 302 is slidably installed at the bottom of the inner cavity of the test chamber 1. Guide rails 309 that cooperate with the seat plate 302 are fixedly installed on the front and rear sides of the bottom of the inner cavity of the test chamber 1. The seat plate 302 is fixedly installed on one side of the sealing door 303. A chute 304 is provided at the top of the seat plate 302. A sliding plate 305 is slidably installed inside the chute 304. Specifically, a number of groups of rollers are rotatably installed at the bottom of the sliding plate 305. First springs 306 are fixedly installed on both sides of the sliding plate 305. Cushion plates 307 and vertical plates 308 are respectively fixedly installed on both sides of the bottom of the inner cavity of the chute 304. And the opposite ends of the two first springs 306 are respectively fixedly connected to the opposite sides of the cushion plate 307 and the vertical plate 308.

[0056] Two guide blocks 406 are fixedly connected to the bottom of the end receiving seat 401. A guide groove 407 that cooperates with the guide block 406 is provided at the top of the sliding plate 305. A fourth spring 408 is fixedly connected between the bottom of the end receiving seat 401 and the top of the sliding plate 305.

[0057] As a preferred solution, in order to achieve the coordinated and stable support of the end receiving seat 401 and the central support plate 402 for the inner cooling screen 2, a first toothed plate 409 and a second toothed plate 4010 are respectively fixedly connected to the opposite sides of the end receiving seat 401 and the central support plate 402. A first toothed roller 4011 is arranged between the first toothed plate 409 and the second toothed plate 4010. And the first toothed roller 4011 is respectively meshed and matched with the first toothed plate 409 and the second toothed plate 4010. Positioning plates 4012 are rotatably installed on the front and rear sides of the first toothed roller 4011. The two positioning plates 4012 are both fixedly installed on the top of the sliding plate 305. And the front and rear sides of the first toothed plate 409 and the second toothed plate 4010 are respectively in sliding contact with the opposite sides of the two positioning plates 4012.

[0058] Among them, under the action of the gravity of the inner cold screen 2, the end bearing seat 401 and the central support plate 402 stably lift and support the bottom of the inner cold screen 2. With the insertion plate 404 thereon, stable support for the inner cold screen 2 can be achieved, and then it is convenient for the inner cold screen 2 to move conveniently along with the seat plate 302.

[0059] As a preferred solution, in order to further position the inner cold screen 2, the positioning assembly 5 includes a lifting plate 501. On the left and right sides of the front and rear sides of the bottom of the lifting plate 501, positioning heads 503 are fixedly connected through two elastic telescopic members 502 respectively. The elastic telescopic member 502 is a sleeve rod structure with a built-in spring and has good telescopic performance. A curved surface 504 that cooperates with the outer arc surface of the inner cold screen 2 is provided at the bottom of the positioning head 503. Suspension rods 505 are penetrated and slidably installed through the four circumferences of the top of the lifting plate 501. The top ends of the suspension rods 505 are fixedly connected to the top of the inner cavity of the test box 1. A fifth spring 506 is sleeved on the outer periphery of the suspension rod 505. 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. Among them, by lowering the lifting plate 501, the elastic telescopic member 502 is extruded, so that the curved surface 504 fits on the outer arc surface of the inner cold screen 2. The setting of the four groups of positioning heads 503 can achieve the horizontal limit of the inner cold screen 2.

[0060] As a preferred solution, in order to realize the automatic downward positioning of the positioning head 503, the steering drive assembly 6 includes a third toothed plate 601, a second toothed roller 602 and two fourth toothed plates 603. The top of the third toothed plate 601 is meshed and cooperated with the bottom of the second toothed roller 602. The two fourth toothed plates 603 are both meshed and cooperated with one side of the second toothed roller 602. The third toothed plate 601 is fixedly installed on the top of the vertical plate 308. The two fourth toothed plates 603 are respectively fixedly installed on the front and rear sides of one side of the lifting plate 501. The second toothed 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 to facilitate the construction of a vacuum environment, a sealing sleeve 604 is fixedly installed on one side of the test box 1. One end of the third toothed plate 601 penetrates the test box 1 and extends to the outside of the sealing sleeve 604.

[0061] As a preferred solution, in order to seal the open end face of the internal 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 matched with the two open end faces of the internal cooling screen 2. On both sides of the back sides of the two triangular sealing plates 701, first wedge-shaped blocks 702 are fixedly installed. At the bottom of the lifting plate 501, a second wedge-shaped block 703 that is matched with the first wedge-shaped block 702 is fixedly installed. One side of a triangular sealing plate 701 is communicated with a helium gas hose 704. One end of the helium gas hose 704 penetrates through the test chamber 1 and extends to the outside of the test chamber 1. As a detailed description, one end of the helium gas hose 704 is communicated with an external helium gas cylinder through a three-way pipe, and a supply valve is arranged in the communicating section. The other end of the three-way pipe is communicated with a vacuum pump, and an exhaust valve is arranged in the communicating section. In this way, the introduction and extraction of helium gas can be realized through one helium gas hose 704.

[0062] In order to facilitate the automatic reset of the triangular sealing plates 701, a plurality of sixth springs 705 are fixedly installed on the back sides of the two triangular sealing plates 701, and one end of each sixth spring 705 is fixedly connected to one side of the inner cavity of the test chamber 1. In order to ensure the stability of the positions of the triangular sealing plates 701 in the horizontal direction, two positioning rods 706 are fixedly installed on the front and back sides of the inner cavity of the test chamber 1. Blind holes 707 that are matched with the positioning rods 706 are formed on the surfaces of the first wedge-shaped blocks 702.

[0063] As a preferred solution, in order to further ensure the stability of the positions of the triangular sealing plates 701, reinforcing plates 507 are fixedly installed around the bottom of the lifting plate 501. A U-shaped limiting frame 508 is sleeved and slidably installed on one side of each reinforcing plate 507. A third spring 509 is fixedly connected between one side of each reinforcing plate 507 and the inner cavity of the U-shaped limiting frame 508. The back sides of the two U-shaped limiting frames 508 arranged on the same side are respectively in sliding contact with the opposite sides of the two first wedge-shaped blocks 702 arranged on the same side.

[0064] In this embodiment, efficient and rapid vacuum helium leak detection of the internal cooling screen 2 is realized. It is simple to operate and has good adaptability.

[0065] Embodiment 2: As an improvement of the previous embodiment, a device for steady-state testing of the internal cooling screen of a tokamak. Third wedge-shaped blocks 708 are fixedly installed at the bottoms of the opposite sides of the two triangular sealing plates 701. Fourth wedge-shaped blocks 4013 are fixedly installed on the opposite sides of the two guiding blocks 406. The third wedge-shaped blocks 708 are matched with the fourth wedge-shaped blocks 4013.

[0066] 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.

[0067] The method for using the device for steady-state testing of a cold shield in a tokamak specifically comprises the following steps:

[0068] 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;

[0069] 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;

[0070] 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;

[0071] 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;

[0072] During the plugging process, the triangular plugging plate 701 drives the third wedge block 708 to squeeze the fourth wedge block 4013. The fourth wedge block 4013 drives the guiding block 406 to move downward. The guiding block 406 drives the end bearing seat 401 to squeeze the fourth spring 408 downward. The end bearing seat 401 drives the first toothed plate 409 to move downward. The first toothed plate 409 drives the first toothed roller 4011 to rotate. The first toothed roller 4011 drives the second toothed plate 4010 to move upward. The second toothed plate 4010 drives the central support plate 402 to squeeze the inner cold shield 2 upward, completing the separation of the end bearing seat 401 and the inner cold shield 2.

[0073] S4. When the opening end face of the inner cold shield 2 is plugged, the sealing door 303 completes the plugging of the test chamber 1. After the air in the test chamber 1 is pumped out through the vacuum tube 101 to keep the test chamber 1 in a vacuum state, helium is injected into the plugged inner cold shield 2 through the helium hose 704. When the helium passes through the weld of the inner cold shield 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 shield 2, the leak detector 102 does not detect the helium and does not issue a leak alarm. Then the helium is pumped out to complete the weld detection of the inner cold shield 2.

[0074] 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 chamber 1. The third toothed plate 601 drives the fourth toothed plate 603 to drive the lifting plate 501 to move upward through the second toothed roller 602, so that the positioning head 503 is disengaged from the inner cold shield 2. During this process, the inner cold shield 2 is horizontally limited by the two positioning heads 503. The sliding plate 305 slides in the chute 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 disengaged from the inner cold shield 2, the third toothed plate 601 is separated from the second toothed roller 602. The sliding plate 305 drives the inner cold shield 2 to move to the outside of the test chamber 1.

[0075] During the upward movement of the lifting plate 501, the second wedge block 703 gradually disengages from the first wedge block 702. With the reset of the sixth spring 705, the triangular plugging plate 701 gradually disengages from the inner cold shield 2. During this process, the triangular plugging plate 701 drives the third wedge block 708 to disengage from the fourth wedge block 4013. The inner cold shield 2 squeezes the central support plate 402 to make the second toothed plate 4010 descend. The second toothed plate 4010 drives the first toothed plate 409 to rise through the first toothed roller 4011 until the inner cold shield 2 lands on the end bearing seat 401 and the plug plate 404 thereon. Then, with the continuous movement of the seat plate 302, the inner cold shield 2 is moved out of the test chamber 1.

[0076] S6. Lift and unload the internally cooled screen 2 that has completed the test, reset the fourth spring 408, push the end bearing seat 401 to rise and reset, the second spring 405 in the center support plate 402 pushes the insertion plate 404 to reset, and the two first springs 306 push the sliding plate 305 to reset.

[0077] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for steady-state testing of an in-vessel cryopanel in a tokamak, comprising a test chamber (1) and an in-vessel cryopanel (2) arranged in the test chamber (1), characterized in that: A moving base (3) is arranged at the bottom of the inner cavity of the test chamber (1). A receiving component (4) is arranged at the top of the moving base (3). The inner cooling screen (2) is placed on the top of the receiving component (4). A positioning component (5) is arranged at the top of the inner cavity of the test chamber (1). A steering drive component (6) which is matched with the positioning component (5) is also arranged at the top of the moving base (3). End face sealing components (7) are arranged on both the front and rear sides of the inner cavity of the test chamber (1), and the end face sealing components (7) are matched with the inner cooling screen (2). The receiving component (4) includes two end receiving seats (401) and a central support plate (402). The two end receiving seats (401) are respectively arranged on both sides of the central support plate (402). Slots (403) are formed on both the front and rear sides of the two end receiving seats (401) and the central support plate (402). A plug board (404) is slidably installed inside the slot (403). A second spring (405) is fixedly connected between one side of the plug board (404) and one side of the inner cavity of the slot (403). A vacuum pumping pipe (101) is communicated with the top of the test chamber (1). A leak detector (102) is also fixedly connected to the top of the test chamber (1). One side of an end face sealing component (7) is communicated with a helium hose (704). Two guiding blocks (406) are fixedly connected to the bottom of the end receiving seat (401). A guiding groove (407) which is matched with the guiding blocks (406) is formed on the top of the middle slide plate (305) of the moving base (3). A fourth spring (408) is fixedly connected between the bottom of the end receiving seat (401) and the top of the slide plate (305). First toothed plates (409) and second toothed plates (4010) are respectively fixedly connected to the opposite sides of the end receiving seats (401) and the central support plate (402). A first toothed roller (4011) is arranged between the first toothed plate (409) and the second toothed plate (4010), and the first toothed roller (4011) is respectively meshed and matched with the first toothed plate (409) and the second toothed plate (4010). Positioning plates (4012) are rotatably installed on both the front and rear sides of the first toothed roller (4011), and the front and rear sides of the first toothed plate (409) and the second toothed plate (4010) are respectively in sliding contact with the opposite sides of the two positioning plates (4012). Both of the two positioning plates (4012) are fixedly installed on the top of the slide plate (305). Third wedge-shaped blocks (708) are respectively fixedly installed at the bottoms of the opposite sides of the two triangular sealing plates (701) in the end face sealing component (7). Fourth wedge-shaped blocks (4013) are respectively fixedly installed on the opposite sides of the two guiding blocks (406) in the receiving component (4), and the third wedge-shaped blocks (708) are matched with the fourth wedge-shaped blocks (4013).

2. The device for steady-state testing of the inner cold shield in a tokamak according to claim 1, characterized in that: The moving base (3) includes a hydraulic telescopic rod (301) and a seat plate (302). A sealing door (303) is fixedly installed at the telescopic end of the hydraulic telescopic rod (301). The seat plate (302) is fixedly installed on one side of the sealing door (303). A chute (304) is formed at the top of the seat plate (302). A sliding plate (305) is slidably installed inside the chute (304). First springs (306) are fixedly installed on both sides of the sliding plate (305). On both sides of the bottom of the inner cavity of the chute (304), a cushion plate (307) and a vertical plate (308) are respectively fixedly installed. And the opposite ends of the two first springs (306) are fixedly connected to the opposite sides of the cushion plate (307) and the vertical plate (308); The hydraulic telescopic rod (301) is fixedly installed at the bottom of the test box (1). The seat plate (302) is slidably installed at the bottom of the inner cavity of the test box (1). Guide rails (309) which are used in cooperation with the seat plate (302) are fixedly installed on 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 the inner cold shield in a tokamak according to claim 2, characterized in that: The positioning assembly (5) includes a lifting plate (501). On the left and right sides of the front and rear sides of the bottom of the lifting plate (501), positioning heads (503) are fixedly connected through two elastic telescopic members (502). A curved surface (504) which is used in cooperation with the outer arc surface of the inner cold screen (2) is formed at the bottom of the positioning head (503); Suspension rods (505) penetrate through and are slidably installed around the top of the lifting plate (501). The top ends of the suspension rods (505) are fixedly connected to the top of the inner cavity of the test box (1). A fifth spring (506) is sleeved on the outer periphery of the suspension rod (505). 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).

4. A device for steady-state testing of an in-vessel cryopanel in a tokamak, characterized in that: The steering drive assembly (6) includes a third toothed plate (601), a second toothed roller (602) and two fourth toothed plates (603). The top of the third toothed plate (601) is meshed and cooperated with the bottom of the second toothed roller (602). The two fourth toothed plates (603) are both meshed and cooperated with one side of the second toothed roller (602); The third toothed plate (601) is fixedly installed at the top of the vertical plate (308). The two fourth toothed plates (603) are respectively fixedly installed on the front and rear sides of one side of the lifting plate (501). The second toothed roller (602) is rotatably installed between the front and rear sides of the inner cavity of the test box (1); A sealing sleeve (604) is fixedly installed on one side of the test box (1). One end of the third toothed plate (601) penetrates through the test box (1) and extends to the outside of the sealing sleeve (604).

5. The device for steady-state testing of the internal cold screen in a tokamak according to claim 4, characterized in that: The end face plugging assembly (7) includes two triangular plugging plates (701), the inclined surfaces of the triangular plugging plates (701) are respectively used in cooperation with the two opening end faces of the internal cold screen (2), and first wedge-shaped blocks (702) are fixedly installed on both sides of the back sides of the two triangular plugging plates (701). A second wedge-shaped block (703) used in cooperation with the first wedge-shaped block (702) is fixedly installed at the bottom of the lifting plate (501). A plurality of sixth springs (705) are fixedly installed on the back sides of the two triangular plugging 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 installed on the front and back sides of the inner cavity of the test box (1). Blind holes (707) used in cooperation with the positioning rods (706) are formed on the surfaces of the first wedge-shaped blocks (702).

6. The device for steady-state testing of the inner cold shield in a tokamak according to claim 5, characterized in that: Reinforcing plates (507) are fixedly installed around the bottom of the lifting plate (501). A U-shaped limiting frame (508) is sleeved and slidably installed on one side of the reinforcing plate (507). A third spring (509) is fixedly connected between one side of the reinforcing plate (507) and the inner cavity of the U-shaped limiting frame (508). The back sides of the two U-shaped limiting frames (508) arranged on the same side are respectively in sliding contact with the opposite sides of the two first wedge-shaped blocks (702) arranged on the same side.

7. A device for steady-state testing of an internal cold shield in a tokamak, characterized in that: One side of one triangular plugging plate (701) is communicated with a helium gas hose (704), and one end of the helium gas hose (704) penetrates through the test box (1) and extends to the outside of the test box (1).

8. A method for using a device for steady-state testing of an in-vessel cryopanel in a tokamak, which uses the device for steady-state testing of an in-vessel cryopanel in a tokamak according to claim 7, characterized in that, Including 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). Lift the internal cold screen (2) onto the two end bearing seats (401). The end bearing seats (401) squeeze the fourth spring (408). The end bearing seats (401) drive the first toothed plate (409) to move downward. The first toothed plate (409) drives the first toothed roller (4011) to rotate. The first toothed roller (4011) drives the second toothed plate (4010) to move upward. The second toothed plate (4010) drives the central support plate (402) to move upward to contact the bottom of the outer arc surface of the internal cold screen (2). Under the supporting force of the plug board (404), the internal cold screen (2) maintains a stable state. S2. Control the hydraulic telescopic rod (301) to contract, so that the seat plate (302) drives the sliding plate (305) to make the inner cold screen (2) enter the interior of the test box (1). 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 toothed plate (601) contacts the second toothed roller (602) and drives the second toothed roller (602) to rotate. The second toothed roller (602) drives the fourth toothed plate (603) to move downward. The fourth toothed plate (603) drives the lifting plate (501) to move downward. The lifting plate (501) stretches the fifth spring (506) and squeezes the elastic telescopic member (502) downward. The elastic telescopic member (502) squeezes the positioning head (503) to make the curved surface (504) of the positioning head (503) fit with the outer arc surface of the inner cold screen (2), completing the horizontal limit of the inner cold screen (2); During the process, the positioning head (503) is squeezed by the elastic telescopic member (502) and contacts the inner cold screen (2) more closely. Among them, the sliding plate (305) slides in the chute (304), stretching a first spring (306) and squeezing another first spring; S3. During the downward movement of the lifting plate (501), the lifting plate (501) drives the second wedge block (703) to squeeze the first wedge block (702) downward. The first wedge block (702) squeezes the triangular sealing plate (701) to make the triangular sealing plate (701) approach and contact the opening end face of the inner cold screen (2). During the process, the extrusion plug (404) compresses the second spring (405) to make the plug (404) sink into the slot (403) until the opening end face of the inner cold screen (2) is completely sealed; During the sealing process, the triangular sealing 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 bearing seat (401) to squeeze the fourth spring (408) downward. The end bearing seat (401) drives the first toothed plate (409) to move downward. The first toothed plate (409) drives the first toothed roller (4011) to rotate. The first toothed roller (4011) drives the second toothed plate (4010) to move upward. The second toothed plate (4010) drives the central support plate (402) to squeeze the inner cold screen (2) upward, completing the separation of the end bearing seat (401) from the inner cold screen (2); S4. When the opening end face of the internal cold shield (2) is blocked, the sealing door (303) blocks the test chamber (1). After the air in the test chamber (1) is pumped out through the vacuum pumping pipe (101) to keep the test chamber (1) in a vacuum state, helium is injected into the blocked internal cold shield (2) through the helium hose (704). When the helium passes through the weld of the internal cold shield (2), the leak detector (102) detects the helium and issues a leakage alarm. When the helium does not pass through the weld of the internal cold shield (2), the leak detector (102) does not detect the helium and does not issue a leakage alarm. Then the helium is pumped out to complete the weld detection of the internal cold shield (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 chamber (1). The third toothed plate (601) drives the fourth toothed plate (603) through the second toothed roller (602) to drive the lifting plate (501) to move upward, so that the positioning head (503) disengages from the internal cold shield (2). During this process, the internal cold shield (2) is horizontally limited by the two positioning heads (503). The slide plate (305) slides in the chute (304). One first spring (306) resets and is compressed, and the other first spring (306) resets and is gradually stretched. When the positioning head (503) completely disengages from the internal cold shield (2), the third toothed plate (601) separates from the second toothed roller (602), and the slide plate (305) drives the internal cold shield (2) to move to the outside of the test chamber (1). During the upward movement of the lifting plate (501), the second wedge block (703) gradually disengages from the first wedge block (702). With the reset of the sixth spring (705), the triangular blocking plate (701) gradually disengages from the internal cold shield (2). During this process, the triangular blocking plate (701) drives the third wedge block (708) to disengage from the fourth wedge block (4013). The internal cold shield (2) presses the center support plate (402) to make the second toothed plate (4010) descend. The second toothed plate (4010) drives the first toothed plate (409) to rise through the first toothed roller (4011) until the internal cold shield (2) lands on the end bearing seat (401) and the plug board (404) thereon. Then, with the continuous movement of the seat plate (302), the internal cold shield (2) moves out of the test chamber (1). S6. Lift and unload the tested internal cold shield (2). The fourth spring (408) resets and pushes the end bearing seat (401) to rise and reset. The second spring (405) in the center support plate (402) pushes the plug board (404) to reset. The two first springs (306) push the slide plate (305) to reset.

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