Supporting and adjusting structure and method for beam source of negative neutral beam system in fusion device

Abstract

The invention relates to the application field of a negative neutral beam ion source system in a magnetic confinement nuclear fusion Tokamak device, in particular to a supporting and adjusting structure and method for a beam source of a negative neutral beam system in a fusion device. According to the technical scheme, the device comprises a beam source device and a stainless steel flat plate base located below the beam source device, and further comprises a welding corrugated pipe which is fixedly installed at one end of the beam source device and used for connecting the beam source device with a bunching vacuum chamber. The beam source three-dimensional space adjusting function is achieved through the characteristic that the welding corrugated pipe is small in rigidity, the position of the beam source can be accurately adjusted through the three-dimensional jacking jack, and therefore the position of a beam spot of a beam can be accurately adjusted, the anion beam spot can be kept at the center of a target, and the problem that the beam spot of an ion beam in a negative neutral beam system in a fusion device is difficult to adjust is solved. And an acting point is provided for the three-dimensional jacking jack through the arc-shaped supporting piece, stress concentration is reduced, point discharge is prevented, and safety in the high-voltage environment is guaranteed.

Description

Technical Field

[0001] The invention relates to the application field of a negative neutral beam ion source system in a magnetic confinement nuclear fusion tokamak device, and in particular to a support and adjustment structure and method for a beam source of a negative neutral beam system in a fusion device. Background Art

[0002] As an ideal energy source, magnetic confinement controlled nuclear fusion has the advantages of abundant fuel storage, efficient energy output, safety and sustainability. It is one of the important ways to solve human energy problems. In magnetic confinement tokamak nuclear fusion devices, the plasma temperature that can be achieved by the plasma current itself and ohmic heating is only a few keV. According to the Lawson criterion, the confined plasma must reach more than 10 keV to have enough fusion reactions to achieve plasma ignition, so auxiliary heating is necessary. Neutral beam injection (NBI) uses the property that neutral particles are not affected by magnetic fields to inject high-energy neutral particles into plasma. The injected neutral particles collide with the electrons or particles of the plasma for ionization. Another related reaction that can form positive ions is charge exchange collision. The formed ions are captured by the magnetic field and transfer energy to the plasma through collision. At present, NBI heating is the one with the highest heating efficiency and the clearest physical mechanism among the four main auxiliary heating methods of tokamaks (neutral beam injection, electron cyclotron, ion cyclotron wave, and low-noise wave).

[0003] At present, neutral beam injection systems have been developed in mainstream fusion devices at home and abroad. For example, EAST, DI I ID, JET and ASDEX-U have all developed neutral beam heating systems to achieve effective heating of the plasma core temperature and promote further improvement of plasma confinement performance. The domestic all-superconducting tokamak EAST device successfully achieved stable operation of high-temperature plasma with a repeatable temperature of over 100 million degrees in the plasma core using a neutral beam heating system. However, neutral beam systems are often very large in size, and the size of negative neutral beam systems required for future fusion devices will be even larger. The inner diameter of the beam source, the core component of a single negative neutral beam system, reaches 2000mm and weighs more than 10 tons. Therefore, it is difficult to achieve 100% collimation and neutrality during the installation of the beam source. The beam line vacuum chamber is as long as 12m, and even a 1° deviation in the installation position of the beam source will result in a 0.2m deviation in the negative ion beam spot. Therefore, a support and adjustment structure and method for the beam source of the negative neutral beam system in a fusion device are proposed to meet the needs of adjusting the beam source angle during the installation, debugging and operation of the beam source, provide a guarantee for the transmission of high-quality negative neutral beam, and have important significance for promoting the future fusion ignition of magnetic confinement nuclear fusion devices. Summary of the invention

[0004] The purpose of the present invention is to address the problems in the background technology that it is difficult to achieve 100% collimation and centering during the installation of the beam source, and the ion beam spot is difficult to adjust, and to propose a support and adjustment structure and method for the beam source of the negative neutral beam system in a fusion device.

[0005] In a first aspect, the present application proposes a support and adjustment structure for a beam source of a negative neutral beam system in a fusion device, comprising a beam source device and a stainless steel flat plate base located below the beam source device, and further comprising:

[0006] A welding bellows fixedly mounted on one end of the beam source device for connecting the beam source device to a beam line vacuum chamber;

[0007] An adjustment component, disposed at the bottom of the beam source device and used for adjusting the spatial position of the beam source device;

[0008] An insulating load-bearing device is installed between the adjusting component and the stainless steel flat base.

[0009] Optionally, the adjustment assembly includes an epoxy hollow platform located below the beam source device, a three-dimensional lifting jack is fixedly installed on the top of the epoxy hollow platform, the arc support is fixed to the piston end of the three-dimensional lifting jack, and the arc support is connected to the beam source device via a flange.

[0010] Optionally, the arc-shaped support members are provided in three groups, which are respectively connected to the beam source device by bolts, and the arc-shaped support members are arranged in a triangle.

[0011] Optionally, the arc-shaped support member is provided with a groove, the dimensions of the groove are 1000-1300 mm in length, 50-70 mm in width, and 15-25 mm in height, and the fillet radius of the arc-shaped support member is 3-7 mm.

[0012] Optionally, the three-dimensional lifting jacks are arranged in three groups, and the three groups of the three-dimensional lifting jacks are arranged in a triangle shape.

[0013] Optionally, the epoxy hollow platform is made of epoxy resin material.

[0014] Optionally, a plurality of elliptical through holes are opened in the middle of the epoxy hollow platform, and the dimensions of the elliptical through holes are 140-180 mm in length, 20-40 mm in width, and 5-15 mm in thickness.

[0015] Optionally, the insulating load-bearing device is a supporting insulator, which is fixed to the bottom of the epoxy hollow platform. The supporting insulator maintains a coaxial position with the three-dimensional lifting jack, and three groups of the supporting insulators are arranged in a triangle.

[0016] Optionally, the dimensions of the stainless steel flat base are 2200-2600 mm in length, 1300-1700 mm in width, and 5-15 mm in thickness.

[0017] In a second aspect, the present application provides a support and adjustment method for a beam source of a negative neutral beam system in a fusion device, which is applied to the support and adjustment structure for a beam source of a negative neutral beam system in a fusion device as described in the first aspect, and comprises the following steps:

[0018] Step 1: Lift the beam source device by an overhead crane and slowly move it to the target position for preliminary alignment;

[0019] Step 2: Connect the welding bellows and the gate valve, and install the supporting adjustment structure after the connection is completed;

[0020] Step 3: During the installation of the support adjustment structure, firstly place the stainless steel flat base directly below the beam source device, and then install the support insulator on the stainless steel flat base;

[0021] Step 4: placing the epoxy hollow platform on the support insulator, and placing the three-dimensional lifting jack and the support insulator coaxially;

[0022] Step 5: Install the arc-shaped support member on the three-dimensional lifting jack, and finally, adjust the position between the beam source device and the arc-shaped support member by a crane to make them fully matched.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] The present invention realizes the three-dimensional space adjustment function of the beam source by utilizing the characteristic of low rigidity of the welding bellows, and utilizes the three-dimensional lifting jack to accurately adjust the position of the beam source, thereby accurately adjusting the position of the beam spot, so that the negative ion beam spot can be kept at the center of the target, thus solving the problem that the ion beam spot in the negative neutral beam system in the fusion device is difficult to adjust;

[0025] The arc-shaped support provides a fulcrum for the three-dimensional lifting jack, reduces stress concentration and prevents tip discharge, and maximizes the creepage distance during high-voltage ignition during beam source commissioning through the epoxy hollow platform, ensuring safety in high-voltage environments.

[0026] Furthermore, the supporting insulator in the present invention has a large creepage distance, can withstand high-voltage insulation requirements and bear large loads, meet the high-voltage insulation and load-bearing requirements of the beam source, ensure the stable operation of the entire device, and evenly distribute the pressure of the beam source weight on the ground through the stainless steel flat base, thereby protecting the ground and ensuring the stability of the device placement. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the overall structure of the present invention is given.

[0028] Figure numerals: 1. beam source device; 2. arc-shaped support member; 3. three-dimensional lifting jack; 4. epoxy hollow platform; 5. support insulator; 6. stainless steel flat base; 7. welded bellows. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0031] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] It should be noted that the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Example

[0036] like Figure 1 As shown, the present invention proposes a support and adjustment structure for a beam source of a negative neutral beam system in a fusion device, comprising a beam source device 1 and a stainless steel flat plate base 6 located below the beam source device 1, the dimensions of the stainless steel flat plate base 6 are 2200-2600 mm in length, 1300-1700 mm in width, and 5-15 mm in thickness, and also comprises a welding bellows 7 fixedly mounted on one end of the beam source device 1 for connecting the beam source device 1 with a beam line vacuum chamber, the welding bellows 7 is made of stainless steel, and its dimensions are preferably 1080 mm*60 mm, and its inner diameter is preferably 2120 mm, one side of the welding bellows 7 is rigidly connected to the large flange of the beam line vacuum chamber by bolts, and the other side of the welding bellows 7 is rigidly connected to the large flange of the beam source by bolts, the welding bellows 7 is used to connect the beam source with the beam line vacuum chamber, and the three-dimensional spatial adjustment function of the beam source is realized by the welding bellows 7.

[0037] In this embodiment, an adjustment component is also included, which is arranged at the bottom of the beam source device 1 and is used to adjust the spatial position of the beam source device 1; the adjustment component includes an epoxy hollow platform 4 located below the beam source device 1, and a three-dimensional lifting jack 3 is fixedly installed on the top of the epoxy hollow platform 4, and an arc support 2 is fixed to the piston end of the three-dimensional lifting jack 3, and the arc support 2 is connected to the beam source device 1 through a flange.

[0038] There are three groups of arc-shaped supports 2, which are connected to the beam source device 1 by bolts respectively, and the arc-shaped supports 2 are arranged in a triangular shape. The arc-shaped supports 2 are provided with grooves, and the groove dimensions are 1000-1300mm in length, 50-70mm in width, and 15-25mm in height. The arc-shaped supports 2 are provided with grooves, and the groove dimensions are preferably 1150*60*20mm. The fillet radius of the arc-shaped supports 2 is 5mm, and the purpose is to reduce stress concentration and prevent tip discharge.

[0039] The fillet radius of the arc support 2 is 3-7 mm. The arc support 2 is made of stainless steel, and its size is preferably 725*550*200 mm. It is connected to the circular flange of the beam source by bolts. The arc support 2 is set in a triangular shape. The arc support 2 is used to fit tightly with the circular flange of the beam source to provide a fulcrum for the three-dimensional lifting jack 3.

[0040] In addition, three groups of three-dimensional lifting jacks 3 are arranged, and the three groups of three-dimensional lifting jacks 3 are arranged in a triangle. The three-dimensional lifting jacks 3 are used to realize the three-dimensional spatial adjustment of the beam source, and have a mechanical self-locking function. The size of the three-dimensional lifting jacks 3 is preferably 320*180*180mm, the synchronization accuracy reaches 1.0mm, and the synchronous lifting and lowering can be fully controlled. In different working conditions, flexible online control is performed by adjusting the number and lifting accuracy of the oil cylinder and the three-dimensional lifting jacks 3. Each control point is relatively independent, and one or several control points can be adjusted separately. The control points do not interfere with each other. The system control interface is simple, easy to operate, and highly automated.

[0041] It is worth noting that the epoxy hollow platform 4 is made of epoxy resin material. A number of elliptical through holes are opened in the middle of the epoxy hollow platform 4, and the size of the elliptical through holes is 140-180mm long, 20-40mm wide, and 5-15mm thick. The epoxy hollow platform 4 is arranged at the bottom of the three-dimensional lifting jack 3, and its size is preferably 2000*1700*10mm. 26 elliptical through holes are opened in the middle of the epoxy hollow platform 4, and the size of the elliptical through holes is 160*30*10mm, which can maximize the creepage distance during the high-voltage ignition during the beam source debugging, and ensure the safety in the high-voltage environment;

[0042] In this embodiment, an insulating load-bearing device is installed between the adjustment component and the stainless steel flat base 6. The insulating load-bearing device is a supporting insulator 5. The supporting insulator 5 is fixed to the bottom of the epoxy hollow platform 4. The supporting insulator 5 maintains a coaxial position with the three-dimensional lifting jack 3. Three groups of supporting insulators 5 are arranged in a triangle. The size of the supporting insulator 5 is preferably 1830*400*400mm, and the creepage distance of the supporting insulator 5 is greater than 4600mm, which can withstand the 650kV high-voltage insulation requirements and can withstand a load of 100 tons.

[0043] Furthermore, a stainless steel flat base 6 is provided at the bottom of the supporting insulator 5. The size of the stainless steel flat base 6 is preferably 2474*1574*10 mm. It is provided at the bottom of the supporting insulator 5. The total weight of the entire NNBI beam source device 1 and the supporting adjustment structure reaches 10 tons. The overall weight is transmitted to the ground by three groups of supporting insulators 5. The stainless steel flat base 6 can reduce the pressure of the beam source device 1 on the ground.

[0044] Example 2

[0045] A method for supporting and adjusting a beam source of a negative neutral beam system in a fusion device comprises the following steps:

[0046] Step 1: Lift the beam source device 1 by means of an overhead crane and slowly move it to the target position for preliminary alignment;

[0047] Step 2: Connect the welding bellows 7 and the gate valve, and after the connection is completed, install the supporting adjustment structure;

[0048] Step 3: During the installation of the support adjustment structure, firstly place the stainless steel flat base 6 directly below the beam source device 1, and then install the support insulator 5 on the stainless steel flat base 6;

[0049] Step 4: Place the epoxy hollow platform 4 on the supporting insulator 5, and place the three-dimensional lifting jack 3 and the supporting insulator 5 coaxially;

[0050] Step 5: Install the arc-shaped support member 2 on the three-dimensional lifting jack 3. Finally, adjust the position between the beam source device 1 and the arc-shaped support member 2 by using a crane to make them fully matched.

[0051] After the support and adjustment structure of the beam source of the negative neutral beam injection system of the entire fusion device is installed, the three-dimensional lifting jack 3 is adjusted in three dimensions to keep the entire beam source device 1 relatively level, thereby achieving effective adjustment of the position of the beam spot so that the negative ion beam spot can be maintained at the center of the target, solving the problem of the difficulty in adjusting the ion beam spot in the negative neutral beam system of the fusion device, which is of great significance for promoting the establishment of the beam source device of the negative neutral beam system.

[0052] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A support and adjustment structure for a beam source of a negative neutral beam system in a fusion device, comprising a beam source device (1) and a stainless steel flat plate base (6) located below the beam source device (1), characterized in that: Also includes: A welding bellows (7) fixedly mounted on one end of the beam source device (1) and used for connecting the beam source device (1) to a beam line vacuum chamber; An adjustment component, arranged at the bottom of the beam source device (1) and used for adjusting the spatial position of the beam source device (1); An insulating load-bearing device is installed between the adjustment component and the stainless steel flat base (6).

2. The support and adjustment structure for a beam source of a negative neutral beam system in a fusion device according to claim 1, characterized in that: The adjustment component comprises an epoxy hollow platform (4) located below the beam source device (1), a three-dimensional lifting jack (3) is fixedly installed on the top of the epoxy hollow platform (4), the arc-shaped support member (2) is fixed to the piston end of the three-dimensional lifting jack (3), and the arc-shaped support member (2) is connected to the beam source device (1) via a flange.

3. The support and adjustment structure for a beam source of a negative neutral beam system in a fusion device according to claim 2, characterized in that: The arc-shaped support members (2) are provided in three groups, which are respectively connected to the beam source device (1) via bolts, and the arc-shaped support members (2) are arranged in a triangular shape.

4. The support and adjustment structure for a beam source of a negative neutral beam system in a fusion device according to claim 3, characterized in that: The arc-shaped support member (2) is provided with a groove, the dimensions of which are 1000-1300 mm in length, 50-70 mm in width, and 15-25 mm in height, and the fillet radius of the arc-shaped support member (2) is 3-7 mm.

5. The support and adjustment structure for a beam source of a negative neutral beam system in a fusion device according to claim 4, characterized in that: The three-dimensional lifting jacks (3) are arranged in three groups, and the three groups of three-dimensional lifting jacks (3) are arranged in a triangle shape.

6. The support and adjustment structure for the beam source of the negative neutral beam system in a fusion device according to claim 5, characterized in that: The epoxy hollow platform (4) is made of epoxy resin material.

7. A support and adjustment structure for a beam source of a negative neutral beam system in a fusion device according to claim 6, characterized in that: A plurality of elliptical through holes are provided in the middle of the epoxy hollow platform (4), and the dimensions of the elliptical through holes are 140-180 mm in length, 20-40 mm in width, and 5-15 mm in thickness.

8. The support and adjustment structure for a beam source of a negative neutral beam system in a fusion device according to claim 2, characterized in that: The insulating load-bearing device is a supporting insulator (5), which is fixed to the bottom of the epoxy hollow platform (4). The supporting insulator (5) maintains a coaxial position with the three-dimensional lifting jack (3), and three groups of the supporting insulators (5) are arranged in a triangle.

9. The support and adjustment structure for a beam source of a negative neutral beam system in a fusion device according to claim 1, characterized in that: The dimensions of the stainless steel flat base (6) are 2200-2600 mm in length, 1300-1700 mm in width, and 5-15 mm in thickness.

10. A method for supporting and adjusting a beam source of a negative neutral beam system in a fusion device, applied to the supporting and adjusting structure for a beam source of a negative neutral beam system in a fusion device as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Lift the beam source device (1) by means of an overhead crane and slowly move it to a target position for preliminary alignment; Step 2: Connect the welding bellows (7) and the gate valve, and after the connection is completed, install the supporting and adjusting structure; Step 3: During the installation of the support adjustment structure, the stainless steel flat base (6) is first placed directly below the beam source device (1), and then the support insulator (5) is installed on the stainless steel flat base (6); Step 4: placing the epoxy hollow platform (4) on the supporting insulator (5), and placing the three-dimensional lifting jack (3) and the supporting insulator (5) coaxially; Step 5: Install the arc-shaped support member (2) on the three-dimensional lifting jack (3), and finally, adjust the position between the beam source device (1) and the arc-shaped support member (2) by using a crane so that they are fully matched.

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