A high-speed gas injection pipe system for an FRC fusion device

Abstract

The utility model discloses a high -speed injection pipe line system for FRC fusion device, including intake pipeline, distribution pipeline, vacuum pumping pipeline and a plurality of parallelly connected injection pipe line, the injection pipe line includes a plurality of parallelly connected injection bottle, injection pressure gauge, injection manual valve, injection check valve that communicate in proper order, the intake pipe includes intake manual valve, intake pressure reducing valve, intake pressure gauge, mass flowmeter that communicate in proper order, and intake manual valve is connected with injection check valve, distribution pipeline both ends are connected with mass flowmeter, vacuum pumping pipeline respectively, and the middle part is equipped with a plurality of interface pipeline, the interface pipeline includes the interface pressure gauge, interface manual valve, the sleeve joint that communicate in proper order, the vacuum pumping pipeline includes vacuum pump, vacuum manual valve I, vacuum manual valve II, vacuum check valve that communicate in proper order.

Description

Technical Field

[0001] This utility model relates to a high-speed gas injection pipeline system for FRC fusion devices, belonging to the field of FRC fusion device gas injection technology. Background Technology

[0002] Field inverse configuration (FRC) is a compact, toroidal plasma configuration with high specific pressure, representing a typical technological route for magnetic inertial confinement fusion. Compared to mainstream tokamak and inertial confinement fusion, FRC devices offer significant advantages such as relatively simple structure, low construction cost, and high energy density. In recent years, FRC research has received widespread attention because it theoretically meets humanity's pursuit of safe, efficient, clean, and sustainable energy, and is considered one of the potential technological pathways to achieving controlled nuclear fusion energy.

[0003] FRC devices typically consist of plasma formation regions at both ends and a collision-fusion region at the center. Their working principle is as follows: first, FRC plasma is generated in the formation regions using theta-pinch technology; then, the plasma is colliding and fusing towards the central region to produce plasma with higher parameters. During this process, the distribution and timing control of the neutral gas within the device have a decisive influence on the final plasma parameters. Notably, the construction cost of an FRC device is less than one-tenth that of a tokamak device, and its modular design allows for rapid iterative upgrades, giving it a significant advantage in commercial applications. In the FRC experimental setup, the high-speed gas injection system is a crucial subsystem. Its main function is to inject fuel gas with a specific flow rate and spatial distribution into the vacuum chamber within milliseconds to microseconds, providing the necessary conditions for plasma formation and maintenance. The performance of the gas injection system directly affects the efficiency, stability, and final parameters of plasma formation.

[0004] The existing gas injection system for FRC fusion devices has the following shortcomings, making it difficult to meet the requirements for stable operation and safety of the device: 1. Low system integration: In traditional designs, the VMP (Gas Management Module) is an independent component that requires separate installation space and is not integrated with the gas cylinder cabinet, increasing the complexity of pipeline connections and the equipment footprint.

[0005] 2. Grounding safety hazards: The system grounding resistance value and pipeline connection resistance requirements are not clearly defined. In actual installation, poor grounding is likely to occur, which may affect the gas injection accuracy due to electromagnetic interference and even cause safety risks.

[0006] 3. Unreasonable pipeline layout: In some designs, the pipeline is prone to forming a ring structure, which may generate induced current in the strong magnetic field environment of the FRC fusion device and interfere with the operation of the device; at the same time, the pipe fittings lack uniform protection and are easily affected by environmental aging when close to components such as pulse valves.

[0007] 4. Non-standard interface sealing: Unused branch pipe interfaces lack clear sealing standards, which can easily lead to gas leakage due to improper sealing, affecting the stability of gas injection pressure, and increasing gas waste and safety hazards.

[0008] 5. Cumbersome operation process: There is no clear matching design for the evacuation and purging process, and temporary pipelines need to be built, resulting in low operation efficiency and difficulty in ensuring thorough evacuation. Utility Model Content

[0009] This invention aims to solve the problems of low integration, unsafe grounding, large interference in pipeline layout, non-standard interface sealing, and cumbersome operation procedures in the existing FRC fusion device gas injection system. In order to meet the requirements of first-generation FRC fusion devices for the stability, safety and convenience of the gas injection system, this utility model provides a high-speed gas injection pipeline system for FRC fusion devices.

[0010] The technical solution provided by this utility model to solve the above-mentioned technical problems is: a high-speed gas injection pipeline system for an FRC fusion device, including an inlet pipeline, a distribution pipeline, a vacuum pumping pipeline and several parallel gas injection pipelines; The gas injection pipeline includes a number of gas injection cylinders, a gas injection pressure gauge, a gas injection manual valve, and a gas injection check valve that are connected in parallel in sequence. The air intake pipe includes an air intake manual valve, an air intake pressure reducing valve, an air intake pressure gauge, and a mass flow meter connected in sequence. The air intake manual valve is connected to the air injection check valve. The distribution pipeline is connected to a mass flow meter and a vacuum pipeline at both ends, and has several interface pipelines in the middle. The interface pipelines include an interface pressure gauge, an interface manual valve, and a compression fitting connected in sequence. The vacuum pipeline includes a vacuum pump, vacuum manual valve I, vacuum manual valve II, and vacuum check valve connected in sequence.

[0011] A further technical solution is that an injection pressure regulating valve I and an injection pressure regulating valve II are provided between the gas injection cylinder and the gas injection pressure gauge.

[0012] A further technical solution is that the outlet of the gas injection cylinder is equipped with a pressure gauge and a manual valve in sequence.

[0013] A further technical solution is that the number of gas injection cylinders is two or six.

[0014] A further technical solution is that an intake pressure regulating valve I and an intake pressure regulating valve II are provided between the intake manual valve and the intake pressure reducing valve.

[0015] A further technical solution is to provide a normally closed solenoid valve between the manual air intake valve and the air injection check valve.

[0016] A further technical solution is that the ferrule connector is provided with a plug.

[0017] A further technical solution is that the plug is a fluororubber sealing plug.

[0018] A further technical solution is that the distribution pipeline is located between vacuum manual valve I and vacuum manual valve II.

[0019] A further technical solution is to provide a grounding wire on the vacuum pipeline.

[0020] This utility model has the following beneficial effects: 1. Enhanced integration: The VMP is integrated into the gas cylinder cabinet panel, eliminating the need for separate setup, reducing the equipment footprint by more than 30%, while also simplifying pipeline connections and reducing system complexity. 2. Safety performance optimization: Dual specifications for grounding resistance and pipeline connection resistance completely solve the problem of poor grounding and avoid electromagnetic interference; the design of insulation protection layer and protective layer extends the service life of pipe fittings and reduces the risk of aging and leakage. 3. Improved stability: The 1 / 4" plug seals unused interfaces, reducing the leakage rate to below 0.01%; the pipeline has no circular structure, eliminating induced current interference, and the gas injection accuracy fluctuation is controlled within ±1%. 4. Improved ease of operation: The vacuum pump is equipped with automatic and manual purging processes, eliminating the need for temporary piping, increasing evacuation efficiency by 50%, and ensuring thorough evacuation (vacuum level up to 10). -4 Pa). Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] The diagram shows: 1-Gas cylinder, 2-Pressure gauge, 3-Manual valve, 4-Gas injection pressure regulating valve I, 5-Gas injection pressure regulating valve II, 6-Gas injection pressure gauge group, 7-Gas injection manual valve, 8-Gas injection check valve, 9-Normally closed solenoid valve, 10-Inlet manual valve, 11-Inlet pressure regulating valve I, 12-Inlet pressure regulating valve II, 13-Pressure reducing valve, 14-Inlet pressure gauge, 15-Mass flow meter, 16-Distribution pipeline, 17-Interface pressure gauge, 18-Interface manual valve, 19-Vacuum pump, 20-Vacuum manual valve I, 21-Grounding wire, 22-Vacuum manual valve II, 23-Vacuum check valve. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figure 1 As shown, a high-speed gas injection pipeline system for an FRC fusion device according to this utility model includes two parallel gas injection pipelines, an inlet pipeline, a distribution pipeline 16, and a vacuum pipeline connected in sequence. The gas injection pipeline includes two gas injection cylinders 1 connected in parallel, a gas injection pressure gauge 6, a gas injection manual valve 7, and a gas injection check valve 8. Two dual-cylinder gas cylinder cabinets (made of 304 stainless steel) were selected to store nitrogen and hydrogen cylinders respectively. The originally independently designed VMP was integrated into the gas cylinder cabinet panel. The gas cylinder cabinet is a double-layer explosion-proof cabinet with leakage alarm and venting function (including integrated VMP panel, pressure gauge and manual valve). Among them, the gas cylinder filling cylinder 1 can be a 40L high-pressure steel cylinder, which comes with a 0-25MPa pressure gauge and a brass steel cylinder valve, without the need to add an additional pressure gauge and manual valve. The air intake pipe includes an air intake manual valve 10, an air intake pressure reducing valve 13, an air intake pressure gauge 14, and a mass flow meter 15 connected in sequence. The air intake manual valve 10 is connected to the air injection check valve 8. The two ends of the distribution pipeline 16 are respectively connected to the mass flow meter 15 and the vacuum pipeline, and the middle part is provided with several interface pipelines, including the interface pressure gauge 17, the interface manual valve 18, and the compression fitting connected in sequence. The vacuum pumping pipeline includes a vacuum pump 19, a vacuum manual valve I 20, a vacuum manual valve II 22, and a vacuum check valve 23 connected in sequence. The distribution pipeline 16 is located between vacuum manual valves I 20 and II 22, and its end is emptied. The vacuum pump 19 is a rotary vane vacuum pump (model 2XZ-4), with an evacuation time of 15 minutes and a vacuum level of 5×10⁻⁶. -4 Pa; Nitrogen (99.999% purity) was used for purging. The gas cylinder valve was manually opened to control the purging flow rate (10L / min). The purging time was 5 minutes, and the end venting height was 4 meters.

[0028] like Figure 1 As shown, in this embodiment, a pressure gauge 2, a manual valve 3, a gas pressure regulating valve I 4, and a gas pressure regulating valve II 5 are sequentially provided between the gas injection cylinder 1 and the gas injection pressure gauge 6, wherein the two sets of pressure regulating valves are used to stabilize the gas pressure.

[0029] In this embodiment, the number of gas injection cylinders 1 can be adjusted to six according to the gas demand.

[0030] like Figure 1 As shown, in this embodiment, an intake pressure regulating valve I 11 and an intake pressure regulating valve II 12 are provided between the intake manual valve 10 and the intake pressure reducing valve 13.

[0031] like Figure 1 As shown, in this embodiment, a normally closed solenoid valve 9 is provided between the intake manual valve 10 and the air injection check valve 8. The normally closed solenoid valve 9 is model SV-12 (1 / 2" interface, voltage 220V), and the cable is 2.5mm. 2 The copper core wire is led to the control cabinet; the mass flow meter model 15 is MF-05 (range 0-50L / min, accuracy ±1%), and the power is drawn from the power supply terminal of the solenoid valve. The cable is led to the control cabinet in the same way, which simplifies the power supply circuit, reduces signal interference, and ensures measurement accuracy.

[0032] like Figure 1 As shown, in this embodiment, the ferrule connector is provided with a plug, which is a 1 / 4" plug or a fluororubber sealing plug of the same specification.

[0033] This utility model uses a 1 / 4" plug to seal the unused branch pipe interface, and combines it with a vacuum pump evacuation design to form a closed-loop stability control of "sealing-evacuation-purging".

[0034] like Figure 1 As shown, in this embodiment, a grounding wire 21 is provided on the vacuum pipeline; the grounding uses a 50mm² wire. 2 A copper strip connects to the gas cylinder cabinet at one end and to the grounding electrode at the other, with a measured grounding resistance of 0.8Ω; simultaneously, the pipe connection of this utility model uses 6mm... 2 The copper wire jumper connection has a measured resistance of 0.08Ω; thus, the grounding resistance of this invention is ≤1Ω + jumper resistance at the conduit connection <0.1Ω, solving the grounding safety and electromagnetic interference problems in the strong magnetic field environment of the FRC fusion device. The pipeline of this utility model is provided with a pipe fitting insulation protection layer, which is a high-temperature resistant silicone sleeve (1.5mm thick).

[0035] The above description is not intended to limit the present invention in any way. Although the present invention has been disclosed through the above embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A high-speed gas injection pipeline system for an FRC fusion device, characterized in that, It includes an intake line, a distribution line, a vacuum line, and several parallel gas injection lines; The gas injection pipeline includes a number of gas injection cylinders, a gas injection pressure gauge, a gas injection manual valve, and a gas injection check valve that are connected in parallel in sequence. The air intake pipe includes an air intake manual valve, an air intake pressure reducing valve, an air intake pressure gauge, and a mass flow meter connected in sequence. The air intake manual valve is connected to the air injection check valve. The distribution pipeline is connected to a mass flow meter and a vacuum pipeline at both ends, and has several interface pipelines in the middle. The interface pipelines include an interface pressure gauge, an interface manual valve, and a compression fitting connected in sequence. The vacuum pipeline includes a vacuum pump, vacuum manual valve I, vacuum manual valve II, and vacuum check valve connected in sequence.

2. A high-speed gas injection pipeline system for an FRC fusion device according to claim 1, characterized in that, The gas injection cylinder and the gas injection pressure gauge are equipped with a gas injection pressure regulating valve I and a gas injection pressure regulating valve II.

3. A high-speed gas injection pipeline system for an FRC fusion device according to claim 2, characterized in that, The outlet of the gas injection cylinder is equipped with a pressure gauge and a manual valve in sequence.

4. A high-speed gas injection pipeline system for an FRC fusion device according to claim 2, characterized in that, The number of gas injection cylinders is two, four, or six.

5. A high-speed gas injection pipeline system for an FRC fusion device according to claim 1, characterized in that, An intake pressure regulating valve I and an intake pressure regulating valve II are provided between the intake manual valve and the intake pressure reducing valve.

6. A high-speed gas injection pipeline system for an FRC fusion device according to claim 5, characterized in that, A normally closed solenoid valve is provided between the manual air intake valve and the air injection check valve.

7. A high-speed gas injection pipeline system for an FRC fusion device according to claim 1, characterized in that, The ferrule connector is equipped with a plug.

8. A high-speed gas injection pipeline system for an FRC fusion device according to claim 7, characterized in that, The plug is a fluororubber sealing plug.

9. A high-speed gas injection pipeline system for an FRC fusion device according to claim 1, characterized in that, The distribution pipeline is located between vacuum manual valve I and vacuum manual valve II.

10. A high-speed gas injection pipeline system for an FRC fusion device according to claim 1, characterized in that, The vacuum pipeline is equipped with a grounding wire.

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