A divertor used in a magnetic confinement nuclear fusion vacuum chamber

Abstract

The present invention relates to the technical field of magnetic confinement nuclear fusion divertor, and specifically to a divertor used in a magnetic confinement nuclear fusion vacuum chamber. The overall structure is composed of an inner stainless steel support plate, a Dome stainless steel support plate and an outer stainless steel support plate. The Dome stainless steel support plate is triangular and arranged between the inner stainless steel support plate and the outer stainless steel support plate. The inner stainless steel support plate and the outer stainless steel support plate are both connected to the Dome stainless steel support plate through a block-type support assembly, and the final overall shape is a W shape. The present invention can be well compatible with the installation and replacement of multiple diagnostic systems in a vacuum chamber. At the same time, after the installation of components such as a cryogenic pump and a first wall, it still has good installation, disassembly and maintainability; the overall structure is simple and reliable, light in weight, can save a lot of valuable space in the vacuum chamber, has good affinity with plasma and has little impact on the vacuum chamber wall.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic confinement nuclear fusion divertors, and in particular to a divertor used in a magnetic confinement nuclear fusion vacuum chamber. Background Art

[0002] The tokamak device is one of the most effective means to study magnetic confinement nuclear fusion. The divertor, as one of the most core components of the device, has the primary function of promptly removing heat energy and particle flow from the plasma.

[0003] According to the research on divertors at home and abroad, graphite, carbon fiber composite materials and tungsten can be selected for plasma materials. The maximum heat flux density that the divertor can withstand has increased from about 1MW / m 2 Increased to 10MW / m 2 As mentioned above, the flow channel structure and the selection of cooling medium can also improve the heat load bearing capacity of the divertor to a certain extent.

[0004] According to electromagnetic force, structural and thermal analysis, the HL-2M divertor uses a combination of graphite and stainless steel plates with good economy and reliability. However, the vacuum chamber of the HL-2M involves the installation of multiple diagnostic systems, cryogenic pumps and first wall components, and the space is very limited. If a Cassette support structure similar to the ITER divertor is used, the entire divertor will occupy a large space and be heavy, increasing the difficulty of installation and disassembly.

[0005] Therefore, considering the limited space inside the HL-2M vacuum chamber, the complex internal components and the need for good maintainability, it is very necessary to design a new divertor structure. Summary of the invention

[0006] The purpose of the present invention is to provide a divertor for use in a magnetic confinement nuclear fusion vacuum chamber in view of the above-mentioned defects in the prior art, so that the equipment still has good maintainability when the inner space of the magnetic confinement nuclear fusion vacuum chamber is limited and the internal components are complex.

[0007] The technical solution of the present invention is as follows:

[0008] A divertor used in a magnetic confinement nuclear fusion vacuum chamber, the overall structure of which consists of an inner stainless steel support plate, a Dome stainless steel support plate and an outer stainless steel support plate, the Dome stainless steel support plate is triangular and arranged between the inner stainless steel support plate and the outer stainless steel support plate, the inner stainless steel support plate and the outer stainless steel support plate are both connected to the Dome stainless steel support plate through a block support assembly, and the overall shape is finally W-shaped;

[0009] The inner stainless steel support plate and the outer stainless steel support plate are connected to the Dome stainless steel support plate through two C-shaped water pipes in the block-type support assembly. A block-type support baffle is arranged outside the C-shaped water pipe, and a block-type support box is covered outside the block-type support baffle. The above connection device constitutes a block-type support assembly;

[0010] The inner stainless steel support plate, the Dome stainless steel support plate and the outer stainless steel support plate are provided with threaded holes on the upper and lower surfaces, which are connected with the graphite block through special screws and pressure rod nuts. The inner stainless steel support plate after connecting with the graphite block is the inner target plate, the Dome stainless steel support plate after connecting with the graphite block is the Dome target plate, and the outer stainless steel support plate after connecting with the graphite block is the outer target plate.

[0011] A divertor used in a magnetic confinement nuclear fusion vacuum chamber. Two water channels are arranged inside an inner stainless steel support plate, a Dome stainless steel support plate and an outer stainless steel support plate. The water channels run through the entire plate and enter from one end and exit from the other end.

[0012] A divertor used in a magnetic confinement nuclear fusion vacuum chamber, the overall structure of which is fixed to an outer latitude ring by fasteners through an L-shaped support plate arranged on the back side of a graphite block mounted on an outer stainless steel support plate; and fixed to an inner latitude ring by fasteners through the back side of a graphite block mounted on an inner stainless steel support plate.

[0013] A divertor used in a magnetic confinement nuclear fusion vacuum chamber, wherein a waist-shaped hole is opened on an L-shaped support plate to ensure accurate adjustment and positioning when installing a W-shaped divertor.

[0014] A divertor used in a magnetic confinement nuclear fusion vacuum chamber, wherein an inner latitude ring and an outer latitude ring are positioned, fixed and locked on a welding stud by means of an adjusting nut and a double nut, and the welding stud and the adjusting nut are used.

[0015] A divertor used in a magnetic confinement nuclear fusion vacuum chamber. The structure is connected into a whole through welding and bolts.

[0016] A divertor used in a magnetic confinement nuclear fusion vacuum chamber, wherein the inner side of a block-type support box is coated with a Ni62 material having a thickness of about 0.2 mm using supersonic flame spraying.

[0017] The beneficial effects of the present invention are:

[0018] The divertor structure provided by the present invention does not limit the material facing the plasma, and graphite, carbon fiber composite materials, tungsten, etc. can be selected according to the heat flux density load of the tokamak device; the present invention can be well compatible with the installation and replacement of multiple diagnostic systems in the vacuum chamber, and after the installation of components such as the cryopump and the first wall, it still has good installation, disassembly and maintainability; the overall structure is simple and reliable, light in weight, can save a lot of valuable space in the vacuum chamber, has good affinity with the plasma and has little impact on the vacuum chamber wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the divertor structure of the present invention;

[0020] Figure 2 is a schematic diagram of a divertor support assembly of the present invention;

[0021] In the figure: 1. Inner target plate; 2. Dome target plate; 3. Outer target plate; 4. Inner latitude ring; 5. L-shaped support plate; 6. Outer latitude ring; 7. Double nut; 8. Adjustment nut; 10. Block support assembly; 101. Block support box; 102. Block support baffle; 11. Water pipe; 12. Inner stainless steel support plate; 13. Dome stainless steel support plate; 14. Outer stainless steel support plate. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 As shown, a divertor used in a magnetic confinement nuclear fusion vacuum chamber, the overall structure of which is composed of an inner stainless steel support plate 12, a Dome stainless steel support plate 13 and an outer stainless steel support plate 14, the Dome stainless steel support plate 13 is triangular and arranged between the inner stainless steel support plate 12 and the outer stainless steel support plate 14, the inner stainless steel support plate 12 and the outer stainless steel support plate 14 are both connected to the Dome stainless steel support plate 13 through a block support assembly 10, and finally the overall shape is W-shaped.

[0024] The inner stainless steel support plate 12 and the outer stainless steel support plate 14 are both connected to the Dome stainless steel support plate 13 through two C-shaped water pipes 11 in the block-type support assembly 10. A block-type support baffle 102 is arranged outside the C-shaped water pipe 11, and a block-type support box 101 is covered outside the block-type support baffle 102. The above-mentioned connecting device constitutes the block-type support assembly 10.

[0025] The inner stainless steel support plate 12, the Dome stainless steel support plate 13 and the outer stainless steel support plate 14 are provided with threaded holes on the upper and lower surfaces, which are connected with the graphite block through special screws and pressure rod nuts. The inner stainless steel support plate 12 after connecting with the graphite block is defined as the inner target plate 1, the Dome stainless steel support plate 13 after connecting with the graphite block is defined as the Dome target plate 2, and the outer stainless steel support plate 14 after connecting with the graphite block is defined as the outer target plate 3.

[0026] Two water channels are arranged inside the inner stainless steel support plate 12, the Dome stainless steel support plate 13 and the outer stainless steel support plate 14. The water channels run through the whole plate, enter from one end and exit from the other end.

[0027] The overall structure is fixed to the outer latitude ring 6 by fasteners through the L-shaped support plate 5 set on the back of the graphite block installed on the outer stainless steel support plate 14; and fixed to the inner latitude ring 4 by fasteners through the back of the graphite block installed on the inner stainless steel support plate 12.

[0028] The L-shaped support plate 5 is provided with waist-shaped holes to ensure accurate adjustment and positioning when installing the W-shaped divertor; the inner latitude ring 4 and the outer latitude ring 6 are positioned, fixed and locked on the welding studs by adjusting nuts 8 and double nuts 7. By using welding studs, adjusting nuts and other components, the manufacturing and installation errors of the vacuum chamber body and the latitude rings can be compensated, and the accurate positioning of the latitude rings can be ensured, thereby ensuring the surface accuracy requirements of the overall W-shaped divertor module.

[0029] The above structure is connected into a whole through welding and bolting, has good strength and flexibility, and can meet the use of the divertor under various working conditions.

[0030] The staggered arrangement between the target plates can prevent most of the inner side of the block-type support from being directly affected by the plasma. However, in order to increase the service life of the overall structure, a coating of about 0.2 mm thick is formed on the inner side of the block-type support box 101 using Ni62 material sprayed by supersonic flame. Through the reasonable design and installation positioning of the block-type support, a large amount of space can be saved in the poloidal and annular spaces between each target plate and the vacuum chamber while meeting the structural strength requirements, for the installation and maintenance of diagnostic components.

Claims

1. A divertor for use in a magnetic confinement nuclear fusion vacuum chamber, the overall structure of which consists of an inner stainless steel support plate, a Dome stainless steel support plate and an outer stainless steel support plate, the Dome stainless steel support plate is triangular and arranged between the inner stainless steel support plate and the outer stainless steel support plate, the inner stainless steel support plate and the outer stainless steel support plate are both connected to the Dome stainless steel support plate through a block support assembly, and the overall shape is finally W-shaped; Features: The inner stainless steel support plate and the outer stainless steel support plate are connected to the Dome stainless steel support plate through two C-shaped water pipes in the block-type support assembly. A block-type support baffle is arranged outside the C-shaped water pipe, and a block-type support box is covered outside the block-type support baffle. The C-shaped water pipe, the Dome stainless steel support plate, the block-type support baffle and the block-type support box constitute the block-type support assembly. The inner stainless steel support plate, the Dome stainless steel support plate and the outer stainless steel support plate are provided with threaded holes on the upper and lower surfaces, which are connected with the graphite block through special screws and pressure rod nuts. The inner stainless steel support plate after connecting with the graphite block is the inner target plate, the Dome stainless steel support plate after connecting with the graphite block is the Dome target plate, and the outer stainless steel support plate after connecting with the graphite block is the outer target plate.

2. A divertor for use in a magnetic confinement nuclear fusion vacuum chamber as claimed in claim 1, characterized in that: Two water channels are arranged inside the inner stainless steel support plate, the Dome stainless steel support plate and the outer stainless steel support plate. The water channels run through the whole plate, entering from one end and exiting from the other end.

3. A divertor for use in a magnetic confinement nuclear fusion vacuum chamber as claimed in claim 1, characterized in that: The overall structure is fixed to the outer latitude ring by fasteners through an L-shaped support plate arranged on the back of the graphite block mounted on the outer stainless steel support plate; and fixed to the inner latitude ring by fasteners through the back of the graphite block mounted on the inner stainless steel support plate.

4. A divertor for use in a magnetic confinement nuclear fusion vacuum chamber as claimed in claim 1, characterized in that: The L-shaped support plate is provided with waist-shaped holes to ensure accurate adjustment and positioning when installing the W-shaped divertor.

5. The divertor for use in a magnetic confinement nuclear fusion vacuum chamber according to claim 1, characterized in that: The inner latitude ring and the outer latitude ring are positioned, fixed and locked on the welding studs through adjusting nuts and double nuts.

6. A divertor for use in a magnetic confinement nuclear fusion vacuum chamber as claimed in claim 1, characterized in that: The overall structure of the above-mentioned divertor is connected into a whole by welding and bolts.

7. A divertor for use in a magnetic confinement nuclear fusion vacuum chamber as claimed in claim 1, characterized in that: The inner side of the block support box is coated with Ni62 material with a thickness of about 0.2 mm using supersonic flame spraying.

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