A remote operation structure for a Tokamak divertor connection component

Abstract

The present invention relates to a remote operation structure for a Tokamak divertor connection component. The structure includes a box body, a fixed rib plate, a rotating connection rib plate, a rotating connection member, a plurality of movable insertion pin shafts, a fixed guide rail, an auxiliary protection cover body, an outer support, and a shift key mechanism. The box body is a divertor box body; the fixed rib plate and the rotating connection rib plate are respectively connected to the box body; the rotating connection member is connected to the rotating connection rib plate; the auxiliary protection cover body is connected to the fixed guide rail; the fixed rib plate and the rotating connection member are connected by the movable insertion pin shafts; the fixed guide rail and the rotating connection member are connected by the movable insertion pin shafts. The present invention can effectively reduce the load and complexity of the divertor remote operation; can greatly reduce the time and economic cost of the divertor remote operation; can greatly simplify the existing connection design on the outer side of the divertor. The present invention can be extended to all connection structure components in the vacuum chamber of nuclear fusion devices, including divertors, blankets, limiters, etc.

Description

Technical Field

[0001] The present invention relates to the field of nuclear fusion, and specifically to a remote operation structure for a Tokamak divertor connection component. Background Art

[0002] Fusion energy is one of the most ideal energy options for humanity. If the huge energy generated by nuclear fusion is to be effectively utilized by humans, nuclear fusion must be carried out under people's control. Among them, the Tokamak device is currently considered the most promising and most likely achievable controlled nuclear fusion device in the world.

[0003] The Tokamak device consists of many components. Among them, the divertor is used to control impurities, discharge ash, and discharge energy, and is one of the most core components in the Tokamak nuclear fusion reactor. The divertor module mainly consists of an inner target plate, a Dome target plate, an outer target plate, a load-bearing component supporting the target plate, a single support box body, a cooling system, etc. The divertor is connected to the vacuum chamber through a support and connection mechanism. Since the fusion process is filled with strong neutrons, in such a harsh environment, the components will be activated due to the neutron environment, and thus the components themselves will generate radioactivity. Even when the fusion reactor is shut down, the components in the vacuum chamber will still generate radiation due to activation, and the radiation dose will far exceed the normal value allowed by the human body. However, the maintenance of the fusion reactor is still an essential part of the normal operation of the system. The working environment does not allow staff to enter for maintenance in person, so remote operation must be used for maintenance.

[0004] Therefore, the design of the divertor needs to be compatible with the remote operation design. The specific requirements include:

[0005] When remotely operating the divertor module, the divertor needs to provide an operation interface compatible with remote operation, and the operation should be as simple, direct, and efficient as possible. For the welding and cutting of the cooling pipes, it is necessary to avoid affecting other components as much as possible; the divertor should be able to connect well with the inner and outer tracks of the vacuum chamber and be firmly installed in the vacuum chamber; the support of the divertor needs to meet the 6-point positioning principle. When the divertor module is installed in the vacuum chamber, all its degrees of freedom must be completely restricted by the support structure; the divertor module must provide a direct and effective remote operation interface to facilitate the construction of the divertor by remote operation.

[0006] Patent Publication No. CN 109780010 A discloses a box body locking mechanism suitable for remote operation of a Tokamak divertor. Its outer locking mechanism uses a spring design. Since there is neutron irradiation in the fusion environment, it will cause a certain amount of heat deposition on each component, and a strong electromagnetic force will be generated in the working environment, which will have a great impact on the normal operation of the spring. The usability of the spring design in the fusion environment still needs to be further discussed; and it does not describe the remote operation interface in detail. Summary of the Invention

[0007] To solve the above problems, the present invention provides a remote operation structure for a Tokamak divertor connection component, which mainly includes a box body, a fixed rib plate, a rotating connection rib plate, a rotating connection piece, a movable insertion pin shaft, a fixed guide rail, an auxiliary protection cover body, an outer support, and a shift key mechanism. This design facilitates the disassembly and installation of the divertor module by remote operation in a high neutron flux environment.

[0008] The present invention is realized through the following technical solutions:

[0009] A remote operation structure for a Tokamak divertor connection component, the structure includes a box body, a fixed rib plate, a rotating connection rib plate, a rotating connection piece, a plurality of movable insertion pin shafts, a fixed guide rail, an auxiliary protection cover body, an outer support, and a shift key mechanism. The box body is a divertor box body; the fixed rib plate and the rotating connection rib plate are respectively connected to the box body; the rotating connection piece is connected to the rotating connection rib plate; the auxiliary protection cover body is connected to the fixed guide rail; the fixed rib plate and the rotating connection piece are connected by a movable insertion pin shaft; the fixed guide rail and the rotating connection piece are connected by a movable insertion pin shaft.

[0010] Further, the movable insertion pin shaft is composed of an internal thread sleeve, a rotor, and a threaded shaft. The rotor is welded to the threaded shaft; the internal thread sleeve is connected to the threaded shaft through thread fit and hole-shaft fit.

[0011] Further, the auxiliary protection cover body is connected to the fixed guide rail by a first bolt, and the auxiliary protection cover body is connected to the fixed rib plate by a second bolt.

[0012] Further, the fixed guide rail is integrally welded to the outer support. The outer support seat is located in the vacuum chamber and is fixedly connected to the vacuum chamber; the intermediate guide rail is located in the middle of the fixed guide rail and is connected to the outer support through the shift key mechanism.

[0013] Further, a set of positioning holes is provided on the fixed rib plate;

[0014] The rotating connection rib plate and the rotating connection piece are connected through hole-shaft fit. This shaft is welded and fixed to the rotating connection rib plate, and the rotating connection piece can rotate freely around this shaft;

[0015] There are two sets of notch holes in the radial direction of the rotating connection piece, and one set of notch holes corresponds to the positioning holes on the fixed rib plate.

[0016] Further, two sets of holes are provided on the rotating connection piece, one set corresponding to the fixed rib plate and one set corresponding to the fixed guide rail. After one-to-one correspondence, they are respectively connected by movable insertion pin shafts to complete the connection on the outside of the divertor box body.

[0017] Further, the movable insertion pin shaft is composed of an internal thread sleeve, a rotor, and a threaded shaft; the rotor is welded to the middle of the threaded shaft, and rotating the rotor can cause the threaded shaft to rotate together with the rotor.

[0018] Further, the rotor is a gear, a buckle, or a key.

[0019] Further, the shift key mechanism is composed of a hinge structure and two keys, and is located inside the middle guide rail.

[0020] The remote operation structure of the present invention is used for the outer connection mechanism of the divertor. It is arranged outside the box body of the divertor, and fixed rib plates and rotating connection rib plates are set by welding. The rotating connection rib plate is connected with the rotating connector through hole-shaft fit. The shaft is welded and fixed to the rotating connection rib plate, and the rotating connector can rotate freely around this shaft.

[0021] Compared with the prior art, the beneficial effects of the present invention are reflected in:

[0022] It can effectively reduce the load and complexity of the divertor remote operation; it can greatly reduce the time and economic cost of the divertor remote operation; it can greatly simplify the existing outer connection design of the divertor. The present invention can be extended to all connection structure components inside the vacuum chamber of nuclear fusion devices, including divertors, blankets, limiters, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the present invention;

[0024] Figure 2 is a schematic diagram of the side connection structure of the box body;

[0025] Figure 3 is a schematic diagram of the fixed guide rail;

[0026] Figure 4 is a schematic diagram of the middle guide rail and the shift key mechanism;

[0027] Figure 5 Schematic diagram of the working principle of the shift key mechanism;

[0028] Figure 6 is a schematic diagram of the threaded shaft;

[0029] Figure 7 is a schematic diagram of the internal thread sleeve;

[0030] Figure 8 is a schematic diagram of the connection of the movable insertion pin shaft;

[0031] Figure 9 is a schematic diagram of the auxiliary protective cover.

[0032] Description of the drawing reference numerals: box body 1, fixed rib plate 2, rotating connection rib plate 3, rotating connection member 4, movable insertion pin shaft 5, fixed guide rail 6, auxiliary protective cover body 7, outer support 8, intermediate guide rail 9, shift key mechanism 10, internal thread sleeve 11, rotor 12, threaded shaft 13, bolt 14, bolt 15. Detailed implementation manners

[0033] The following describes the detailed implementation manners of the present invention with reference to the drawings.

[0034] As Figures 1-9 shown, a remote operation structure of a Tokamak divertor connection component includes a box body 1, a fixed rib plate 2, a rotating connection rib plate 3, a rotating connection member 4, a movable insertion pin shaft 5, a fixed guide rail 6, an auxiliary protective cover body 7, and an outer support 8.

[0035] As Figure 2 shown, the fixed rib plate 2 and the rotating connection rib plate 3 are connected to the box body 1 by welding, and the rotating connection member 4 is connected to the rotating connection rib plate 3 by a shaft, and the shaft is fixedly welded to the rotating connection rib plate, and the rotating connection member can rotate freely around the shaft;

[0036] A set of positioning holes are provided on the fixed rib plate 2;

[0037] There are two sets of notch holes in the radial direction of the rotating connection member, and one set of notch holes corresponds to the positioning holes on the fixed rib plate.

[0038] As Figure 3 shown, the divertor modules are evenly distributed circumferentially in the vacuum chamber, each module corresponding to a circumferential angle of 4.5°, and a total of 80 divertor modules are evenly distributed in the vacuum chamber; each outer support 8 in the vacuum chamber corresponds to a set of fixed guide rails 6, and the fixed guide rails 6 except the intermediate guide rail 9 are fixedly welded on the outer support 8, and each set of fixed guide rails 6 corresponds to 5 divertor modules. There are 16 outer supports in the vacuum chamber, that is, 16 sets of fixed guide rails 6; there is a set of holes on the fixed guide rail 6 corresponding to a set of notch holes on the rotating connection member.

[0039] The intermediate guide rail 9 is a part of the fixed guide rail 6 and is located in the middle of the fixed guide rail. The fixed guide rail corresponds to 5 divertor modules, and the intermediate guide rail corresponds to the module in the middle of the 5 divertor modules. The intermediate guide rail 9 is connected to the fixed guide rail through a shift key mechanism, and the shift key mechanism itself serves as a connection mechanism and also as a remote operation interface, facilitating the disassembly and installation of the intermediate guide rail during remote operation;

[0040] As Figure 4As shown, the middle guide rail 9 is part of the fixed guide rail 6 and is located in the middle of the fixed guide rail 6. The fixed guide rail 6 corresponds to 5 divertor modules, and the middle guide rail 9 corresponds to the module in the middle of the 5 divertor modules. The middle guide rail 9 is connected to the fixed guide rail 6 through the shift key mechanism 10. The shift key mechanism 10 itself serves as both a connecting mechanism and a teleoperation interface, facilitating the disassembly and installation of the middle guide rail 9 through teleoperation. The shift key mechanism 10 consists of a hinge structure and two keys, which is located inside the middle guide rail 9. By operating the teleoperation interface on the shift key mechanism 10, the position of the keys can be changed, specifically manifested as the keys being inserted into or disengaged from the grooves on both sides of the fixed guide rail 6, thereby completing the installation and disassembly of the middle guide rail 9, as specifically shown in Figure 5 shown. Only by completing the unloading of the middle guide rail 9 can the maintenance of the middle divertor module be completed. Similarly, only by completing the maintenance of the middle divertor module can the maintenance of the two-side divertor modules be carried out.

[0041] As Figures 6-7 shown, the movable pin shaft 5 is specifically composed of a rotor 12, a threaded shaft 13, and an internally threaded sleeve 11. Specifically, the rotor 12 is welded to the middle of the threaded shaft 13. The functional explanation of the rotor 12 is that rotating the rotor 12 can make the threaded shaft 13 rotate together with the rotor 12. The rotor 12 can be in the form of a gear, a buckle, a key, etc. The threaded shaft 13 is a smooth shaft with 10 mm long threads at both ends. The internally threaded sleeve 11 is based on a cylindrical sleeve, and its axial cross-section is a notched circle, corresponding to the notched hole on the rotating connecting piece 4. The internal thread length in the internally threaded sleeve 11 is half of the sleeve length, specifically from one end face to the center. The internal threads of the two internally threaded sleeves 11 have opposite helix directions. The two internally threaded sleeves 11 cooperate with the threaded shaft 13 to ensure that the threaded sides of the two internally threaded sleeves 11 face the rotor 12 side. Since the internal thread of the internally threaded sleeve 11 is only half of its length, when the internal thread is fully engaged with the threaded shaft 13, the fit between the internally threaded sleeve 11 and the threaded shaft 13 will change from a threaded fit to a hole-shaft fit, and the internally threaded sleeve 11 will be able to move axially freely on the threaded shaft 13 until the threads are re-engaged or the sleeve contacts the end face of the rotor 12. At this time, the movable pin shaft 5 in this state can perform the connection operation on the rotating connecting piece 4 and the fixed guide rail 6.

[0042] As Figure 8As shown in the figure, there are two groups of the notch holes on the rotating connecting piece 4, one group corresponding to the fixed rib plate 2 and the other group corresponding to the fixed guide rail 6. After the one-to-one correspondence between the two, they are connected by the movable insertion pin shaft 5 to complete the connection on the outer side of the divertor box body 1, specifically the connection between the box body 1 and the fixed guide rail 6. The movable insertion pin shaft 5 moves to the corresponding positions of the notch holes of the rotating connecting piece 4 and the fixed rib plate 2 or the corresponding positions of the notch holes of the rotating connecting piece and the fixed guide rail 6. The internal thread sleeve 11 moves towards both sides until the sleeve and the notch holes are matched, and the sleeve axially moves until the internal threads are in thread fit; the remotely operated rotor 12 is operated to rotate the threaded shaft 13. Due to the influence of the notch holes, the internal thread sleeve 11 cannot rotate and can only perform the lateral precession caused by the thread fit; due to the setting of the thread direction, when the rotor 12 rotates, the two internal thread sleeves 11 on both sides can only perform the lateral precession of moving towards each other or away from each other at the same time; rotating the rotor 12 causes the internal thread sleeves 11 to move away from each other to the lateral limit position, and at this time the connection of this hole is completed. The connection method of the other hole is the same as this; the disassembly process is the reverse process of the above process. Specifically, it can be simply explained that rotating the rotor 12 causes the internal thread sleeves 11 to move towards each other. When the thread fit ends, the internal thread sleeves 11 can freely axially move on the threaded shaft 13, and the movable insertion pin shaft 5 can be directly taken away by remote operation to complete the disassembly.

[0043] As Figure 9 shown, the auxiliary protective cover body 7 is connected to the fixed guide rail 6 by the M50 bolt 14 and connected to the fixed rib plate 2 by the M12 bolt 15, aiming to prevent the heat deposition caused by the neutron nuclear heat from having an adverse effect on the connection mechanism below the auxiliary cover body 7.

[0044] The present invention details a remotely operated structure of a Tokamak divertor connection component, providing a method for technicians engaged in the technical field of nuclear fusion reactor technology to design and develop the divertor module. The present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the technical field, as long as various changes are within the spirit and scope defined and determined by the appended claims, all inventions and creations using the concept of the present invention are within the scope of protection.

Claims

1. A remote operation structure for a Tokamak divertor connection component, Characterized in that: The structure includes a box body (1), a fixed rib plate (2), a rotating connection rib plate (3), a rotating connection member (4), a plurality of movable insertion pin shafts (5), a fixed guide rail (6), an auxiliary protective cover body (7), an outer support (8), and a shift key mechanism (10); the box body (1) is a divertor box body; the fixed rib plate (2) and the rotating connection rib plate (3) are respectively connected to the box body (1); the rotating connection member (4) is connected to the rotating connection rib plate (3); the auxiliary protective cover body (7) is connected to the fixed guide rail (6); the fixed rib plate (2) and the rotating connection member (4) are connected by the movable insertion pin shaft (5); the fixed guide rail (6) and the rotating connection member (4) are connected by the movable insertion pin shaft (5); The fixed guide rail (6) is integrally welded to the outer support (8), and the outer support seat is located inside the vacuum chamber and is fixedly connected to the vacuum chamber; the intermediate guide rail (9) is located at the middle position of the fixed guide rail (6) and is connected to the outer support (8) through the shift key mechanism; A set of positioning holes are provided on the fixed rib plate (2); The rotating connection rib plate (3) and the rotating connection member (4) are connected by hole-shaft fit, and the shaft is welded and fixed to the rotating connection rib plate, and the rotating connection member can rotate freely around the shaft; There are two sets of notch holes in the radial direction of the rotating connection member, and one set of notch holes corresponds to the positioning holes of the fixed rib plate; Two sets of holes are provided on the rotating connection member (4), one set corresponding to the fixed rib plate (2) and one set corresponding to the fixed guide rail (6). After one-to-one correspondence, they are respectively connected by the movable insertion pin shaft (5) to complete the connection on the outside of the divertor box body; The shift key mechanism consists of a hinge structure and two keys and is located inside the intermediate guide rail (9).

2. A remote operation structure for a Tokamak divertor connection component according to claim 1, Characterized in that: The movable insertion pin shaft (5) is composed of an internal thread sleeve (11), a rotor (12), and a threaded shaft (13), and the rotor (12) is welded to the threaded shaft (13); the internal thread sleeve (11) is connected to the threaded shaft (13) through thread fit and hole-shaft fit.

3. A remote operation structure for a Tokamak divertor connection component according to claim 1, Characterized in that: The auxiliary protective cover body (7) is connected to the fixed guide rail (6) through a first bolt (14), and the auxiliary protective cover body (7) is connected to the fixed rib plate (2) through a second bolt (15).

4. A remote operation structure for a Tokamak divertor connection component according to claim 1, Characterized in that: The movable insertion pin shaft (5) is composed of an internal thread sleeve (11), a rotor (12), and a threaded shaft (13); the rotor (12) is welded to the middle of the threaded shaft (13), and rotating the rotor (12) can make the threaded shaft (13) rotate together with the rotor (12).

5. A remote operation structure for a Tokamak divertor connection component according to claim 4, Characterized in that: The rotor is a gear, a buckle, or a key.

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