阅读说明：本技术 水冷钼铜限制器 (Water-cooling molybdenum-copper limiter ) 是由 徐朝胜 李雪芹 孙兵 姜北燕 罗歆 于 2021-06-11 设计创作，主要内容包括：本发明公开了一种水冷钼铜限制器,包括真空室腔体,真空室腔体内设有与等离子体运动方向相对的限制板,限制板处设有冷却管路；所述限制板为钼限制板,其朝向等离子体运动方向的面呈锯齿状,限制板的另一面焊接有无氧铜冷却盖板及无氧铜冷却底板,冷却管路穿设在无氧铜冷却盖板及无氧铜冷却底板所构成的空间内,所述冷却管路沿真空室腔体的径向方向环形设置。本发明利用限制板呈锯齿状面的设计,在等离子体向其运动时,提高了对杂散等离子体的吸收,从而可减少对光谱诊断系统信号采集的影响；所配合冷却管路的材料及布置设计,有效的提高了热传导,冷却效果佳,从而能够有控制限制器的温升,使限制器的运行效果稳定可靠。(The invention discloses a water-cooling molybdenum-copper limiter, which comprises a vacuum chamber cavity, wherein a limiting plate opposite to the motion direction of a plasma is arranged in the vacuum chamber cavity, and a cooling pipeline is arranged at the limiting plate; the limiting plate is a molybdenum limiting plate, the surface of the limiting plate facing the motion direction of the plasma is in a sawtooth shape, the other surface of the limiting plate is welded with an oxygen-free copper cooling cover plate and an oxygen-free copper cooling bottom plate, a cooling pipeline penetrates through a space formed by the oxygen-free copper cooling cover plate and the oxygen-free copper cooling bottom plate, and the cooling pipeline is annularly arranged along the radial direction of the vacuum chamber cavity. The invention utilizes the design that the limiting plate is in a sawtooth-shaped surface, and improves the absorption of stray plasma when the plasma moves towards the limiting plate, thereby reducing the influence on the signal acquisition of a spectrum diagnosis system; the material and the arrangement design of the cooling pipeline are matched, so that the heat conduction is effectively improved, the cooling effect is good, the temperature rise of the limiter can be controlled, and the operation effect of the limiter is stable and reliable.)

1. The utility model provides a water-cooling molybdenum copper limiter, includes real empty room cavity, is equipped with the restriction board relative with plasma motion direction in the real empty room cavity, and restriction board department is equipped with cooling line, its characterized in that: the limiting plate is a molybdenum limiting plate, the surface of the limiting plate facing the motion direction of the plasma is in a sawtooth shape, the other surface of the limiting plate is welded with an oxygen-free copper cooling cover plate and an oxygen-free copper cooling bottom plate, a cooling pipeline penetrates through a space formed by the oxygen-free copper cooling cover plate and the oxygen-free copper cooling bottom plate, and the cooling pipeline is annularly arranged along the radial direction of the vacuum chamber cavity.

2. The water-cooled molybdenum-copper restrictor of claim 1, wherein: the top of the vacuum chamber cavity is provided with a switching flange, and a water inlet pipe and a water outlet pipe are connected to a water inlet and a water outlet of the cooling pipeline through a connecting ring after penetrating through the switching flange.

3. The water-cooled molybdenum-copper restrictor of claim 1 or 2, wherein: the height of the wave crest of the zigzag surface of the limiting plate is 1.2mm, the width of the wave crest is 0.3mm, the radius of the wave crest is 0.1mm, and the angle between adjacent wave crests is 6 degrees.

4. The water-cooled molybdenum-copper restrictor of claim 1 or 2, wherein: the serrated surface of the limiting plate adopts YG₆The special hard alloy turning tool is used for turning, the cutting depth is 0.1mm, and the feed rate is 0.15mm/r, cutting speed of 75m/min, CCL being selected as cutting fluid₄+20# engine oil mixture.

5. The water-cooled molybdenum-copper restrictor of claim 1 or 2, wherein: the oxygen-free copper cooling cover plate and the oxygen-free copper cooling bottom plate firstly adopt YG₈Turning a hard alloy turning tool, wherein the cutting depth is 0.2mm, the feeding amount is 0.15mm/r, the cutting speed is 200m/min, and the cutting fluid is water-soluble cutting fluid; further use of YG₈And (3) milling the hard alloy keyway milling cutter, wherein the milling depth is 0.35mm, the feed speed is 2m/min, the main shaft rotating speed is 6000r/min, and the cutting fluid is water-soluble cutting fluid.

6. The water-cooled molybdenum-copper restrictor of claim 1 or 2, wherein: the limiting plate, the oxygen-free copper cooling cover plate and the oxygen-free copper cooling bottom plate are brazed into a molybdenum-copper limiter assembly in a vacuum degree of 1X10^-3Pa, solder Au35Cu65, heating to 10 ℃/min to 1035 ℃, preserving heat for 15min, and cooling along with the furnace.

7. The water-cooled molybdenum-copper restrictor of claim 2, wherein: the water inlet pipe and the water outlet pipe are made of stainless steel plated with dark nickel, the plating layer is 5 mu, the water inlet pipe, the water outlet pipe and the molybdenum-copper limiter assembly are brazed in a vacuum manner, and the vacuum degree is 1X10^-3Pa, brazing Ag72Cu28, heating to 800 ℃ at a temperature of 10 ℃/min, keeping the temperature for 15min, and cooling along with the furnace.

8. The water-cooled molybdenum-copper restrictor of claim 1 or 2, wherein: the cooling pipeline is inspected by a 3MPa positive pressure cover, the pressure is maintained for 10min, and the leakage rate is less than 1X10^-10Pa•m³/s。

Technical Field

The invention relates to the technical field of nuclear fusion device manufacturing, in particular to a water-cooling molybdenum-copper limiter in a linear plasma device.

Background

The linear plasma device is a device capable of generating and maintaining a linear steady-state plasma, and is used for plasma foundation, material and boundary research, and the limiter is an essential component in the linear plasma device.

By increasing negative bias voltage between the linear plasma generator and the target plate, the generated plasma moves towards the direction of the target plate, and the moving plasma is focused under the constraint of a peripheral focusing magnetic field to form a plasma beam. During the movement of the plasma beam, due to factors such as collision of the plasma with the residual gas and the like, a large amount of stray plasma exists at the edge of the plasma beam and in front of the vacuum cavity, and the stray plasma is an interference factor for testing.

In order to reduce the influence of an invalid part, the traditional limiter structure utilizes a high-temperature resistant material baffle to shield the edge of a plasma from the inner wall part of a vacuum cavity, limits the moving boundary of a plasma beam, and eliminates the plasma between the edge of an ion beam and the vacuum cavity, so that the temperature of a limiting plate is quickly increased, and the limiting baffle cannot be used for a long time. A water cooling structure is added on the limiting baffle plate subsequently, heat generated by plasma striking is led out, however, the plasma striking the limiting plate is reflected due to the smooth limiting surface, and the limiting effect of the baffle plate is reduced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the water-cooling molybdenum-copper limiter which not only can control the temperature rise of the limiter, but also has good limiting effect.

A water-cooled molybdenum-copper limiter comprises a vacuum chamber cavity, wherein a limiting plate opposite to the motion direction of a plasma is arranged in the vacuum chamber cavity, and a cooling pipeline is arranged at the limiting plate; the limiting plate is a molybdenum limiting plate, the surface of the limiting plate facing the motion direction of the plasma is in a sawtooth shape, the other surface of the limiting plate is welded with an oxygen-free copper cooling cover plate and an oxygen-free copper cooling bottom plate, a cooling pipeline penetrates through a space formed by the oxygen-free copper cooling cover plate and the oxygen-free copper cooling bottom plate, and the cooling pipeline is annularly arranged along the radial direction of the vacuum chamber cavity.

The invention utilizes the design that the limiting plate is in a sawtooth-shaped surface, and improves the absorption of stray plasma when the plasma moves towards the limiting plate, thereby reducing the influence on the signal acquisition of a spectrum diagnosis system; the material and the arrangement design of the cooling pipeline are matched, so that the heat conduction is effectively improved, the cooling effect is good, the temperature rise of the limiter can be controlled, and the operation effect of the limiter is stable and reliable.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the arrangement of the cooling circuit according to the present invention;

FIG. 3 is a schematic view of the structure of the serrated surface of the limiting plate according to the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention will be more clearly and clearly defined.

Referring to fig. 1, the water-cooled molybdenum-copper limiter provided by the invention comprises a vacuum chamber cavity 1, a limiting plate 2 opposite to the motion direction of a plasma is arranged in the vacuum chamber cavity 1, a cooling pipeline 3 is arranged at the position of the limiting plate 2, and in order to solve the technical problem in the background technology, the technical scheme of the invention is that the limiting plate 2 is a molybdenum limiting plate, the surface 21 of the limiting plate facing to the motion direction of the plasma is in a sawtooth shape, an oxygen-free copper cooling cover plate 4 and an oxygen-free copper cooling bottom plate 5 are welded on the other surface of the limiting plate 2, the cooling pipeline 3 is arranged in a space formed by the oxygen-free copper cooling cover plate 4 and the oxygen-free copper cooling bottom plate 5 in a penetrating mode, and the cooling pipeline 3 is arranged in a ring shape along the.

When the plasma spectrometer runs, the jagged surface of the limiting plate 2 is utilized, so that the absorption of stray plasma is improved when the plasma moves towards the limiting plate, and the influence on the signal acquisition of the spectrum diagnosis system is reduced. The material and the arrangement design of the cooling pipeline 3 effectively improve the heat conduction and have good cooling effect, thereby being capable of controlling the temperature rise of the limiter and ensuring the stable and reliable operation effect of the limiter.

Example 1

As a further optimization explanation of the above embodiment:

in this embodiment, referring to fig. 1 and 2, an adapter flange 6 is disposed on the top of the vacuum chamber 1, and the water inlet pipe 7 and the water outlet pipe 8 are connected to the water inlet 31 and the water outlet 32 of the cooling pipeline 3 through the connection ring 9 after penetrating through the adapter flange 6. This kind of structural design has simple to operate's advantage.

Example 2

As a further optimization explanation of the above embodiment:

in the embodiment, referring to fig. 3, the height of the peak of the sawtooth-shaped surface of the limiting plate 2 is 1.2mm, the width of the peak is 0.3mm, the radius of the peak is 0.1mm, and the angle between adjacent peaks is 6 °. The adoption of the jagged surface of the limiting plate 2 with the size can better improve the absorption of stray plasma and reduce the influence on the signal acquisition of a spectrum diagnosis system.

Example 3

As a further optimization explanation of the above embodiment:

in this embodiment, YG is adopted as the serrated surface of the limiting plate 2₆Turning with special hard alloy lathe tool with cutting depth of 0.1mm, feed rate of 0.15mm/r, cutting speed of 75m/min, and CCL as cutting fluid₄+20# engine oil mixture. By using YG₆The special hard alloy turning tool can effectively prevent the molybdenum limiting plate from cracking during turning, can meet the requirements of cutting depth and feed amount, and selects CCL₄The +20# engine oil mixed liquid has certain viscosity, and can ensure that the roughness effect of the sawtooth surface is good; CCL₄During the cutting processThe CCL has the advantages of combination of molybdenum and chlorine elements to form chloride, relatively small friction coefficient and lubrication effect₄The amount of (B) is preferably 10%.

Example 4

As a further optimization explanation of the above embodiment:

in this embodiment, YG is first adopted for the oxygen-free copper cooling cover plate 4 and the oxygen-free copper cooling bottom plate 5₈Turning a hard alloy turning tool, wherein the cutting depth is 0.2mm, the feeding amount is 0.15mm/r, the cutting speed is 200m/min, and the cutting fluid is water-soluble cutting fluid; further use of YG₈And (3) milling the hard alloy keyway milling cutter, wherein the milling depth is 0.35mm, the feed speed is 2m/min, the main shaft rotating speed is 6000r/min, and the cutting fluid is water-soluble cutting fluid.

Example 5

As a further optimization explanation of the above embodiment:

in this embodiment, the limiting plate 2, the oxygen-free copper cooling cover plate 4 and the oxygen-free copper cooling bottom plate 5 are vacuum brazed to form a molybdenum-copper limiter assembly, and the vacuum degree of the molybdenum-copper limiter assembly is 1X10^-3Pa, solder Au35Cu65, heating to 10 ℃/min to 1035 ℃, preserving heat for 15min, and cooling along with the furnace.

Example 6

As a further optimization explanation of the above embodiment:

in this embodiment, the water inlet pipe 7 and the water outlet pipe 8 are made of stainless steel plated with dark nickel, the plating layer is 5 μ, the water inlet pipe 7, the water outlet pipe 8 and the molybdenum-copper limiter assembly are brazed under vacuum, and the vacuum degree is 1X10^-3Pa, brazing Ag72Cu28, heating to 800 ℃ at a temperature of 10 ℃/min, keeping the temperature for 15min, and cooling along with the furnace.

In this embodiment, the process is completed after embodiment 5, and the arrangement of the temperature difference is required for two times of vacuum brazing (the temperature of the molybdenum-copper limiter assembly for the first time is 1035 ℃, and the temperature of the water inlet pipe 7, the water outlet pipe 8 and the molybdenum-copper limiter assembly for the second time is 800 ℃), so that the first weld joint cannot be affected by the second time of vacuum welding.

Example 7

As a further optimization explanation of the above embodiment:

in the embodiment, the cooling pipeline 3 is inspected by a 3MPa positive pressure cover, the pressure is maintained for 10min, and the leakage rate is less than 1X10^-10Pa•m³/s。

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.