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Plasma jet generation device and system

A technology of plasma and generating device, applied in the field of plasma jet, can solve the problems of poor stability, easy discharge termination, affecting jet quality, etc., and achieve the effects of increasing content, increasing energy, and increasing effect

Pending Publication Date: 2020-07-28
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to fluid mechanics, the working gas in the coaxial straight-tube jet generator is prone to turbulence and turbulence, resulting in poor stability during the discharge process and easy discharge termination.
Moreover, under the current electrode structure, the excitation of the working gas molecules is not complete, so that the number of active radicals contained in the jet is insufficient, which in turn affects the quality of the jet. When applied to the surface treatment of polymer materials, the surface treatment effect is affected.
In addition, the current plasma jets that can be generated are difficult to form large-area plasma, and the treatment range is limited, so it is impossible to achieve large-area surface treatment in a short time

Method used

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  • Plasma jet generation device and system

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The first embodiment of the present invention proposes a plasma jet generating device, including: a tube body and electrodes;

[0030] Wherein, the electrodes surround the outer surface of the tube body;

[0031] The pipe body includes a gas input end for receiving the working gas and a jet end for emitting the plasma jet;

[0032] After the working gas is fed into the gas input end, the electrodes are used to apply a voltage to the working gas in the tube until the working gas breaks down to form a plasma jet.

[0033] Specifically, in this embodiment, the electrodes are spaced around the tube body to form a plurality of intervals in the tube body for sufficient collision and excitation of gas particles, which can increase the content of active groups in the jet, and can effectively avoid impurity elements Mixed into the jet to increase the energy of the jet, and improve the effect of hydrophobic and other modification treatments when performing surface modification o...

Embodiment 2

[0051] This embodiment proposes an implementation case of a plasma jet generating device. In this embodiment, it includes: a funnel-shaped plasma jet tube and an electrode, wherein the tube body is a quartz glass tube, and the tube body includes a gas input end and a jet end of the end, such as figure 1 As shown, the first inner diameter 1 of the gas input end is 4mm and the second inner diameter 2 of the gas input end is 6mm, the first inner diameter 7 of the jet end is 8mm and the second inner diameter 8 of the jet end is 10mm, the length of the glass tube is 84mm, and the wall thickness is 2mm.

[0052] In this example, if figure 1 As shown, the electrodes include four ring electrodes, and of course other even numbers of electrodes are not limited here. The four ring electrodes are attached to the outside of the funnel-shaped jet tube, and the electrodes have a width of 3 mm and a thickness of 2 mm. Made of copper sheet. The four ring-shaped electrodes are composed of two...

Embodiment 3

[0065] This embodiment proposes a plasma jet generation system, including a gas flow controller, an adjustable power supply and the aforementioned plasma jet generation device;

[0066] The output end of the gas flow controller is connected to the gas input end of the plasma jet generator, and the gas flow controller communicates with the inner hole of the pipe body;

[0067] The adjustable power supply is connected to the electrodes of the plasma jet generating device;

[0068] The gas flow controller is used to adjust the flow of working gas passing into the pipe body;

[0069] The adjustable power supply is used to change the parameters of the voltage applied to the electrodes to break down the working gas.

[0070] Optionally, the voltage parameters include: voltage peak value and frequency.

[0071] Specifically, the workflow of the system of the present invention is as follows:

[0072] 1. Pass in the working gas, so that the working gas enters the funnel-shaped quart...

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Abstract

The invention discloses a plasma jet generation device and system. The device comprises a pipe body and electrodes, wherein the electrodes are arranged on the tube body in a surrounding manner, the pipe body comprises a gas input end for receiving working gas and a jet end for emitting plasma jet, and after the working gas is introduced into the gas input end, the electrode is used for applying avoltage to the working gas in the pipe body until the working gas is broken down to form plasma jet. According to the invention, the electrodes surround the pipe body at intervals, so that a pluralityof intervals for sufficient collision excitation of gas particles can be constructed in the pipe body, the content of active groups in jet flow can be increased, impurity elements can be effectivelyprevented from being mixed into the jet flow, the energy of the jet flow is improved, and when surface modification treatment is carried out on a high polymer material, the modification treatment effects such as hydrophobicity are improved.

Description

technical field [0001] The invention relates to the technical field of plasma jets, in particular to a plasma jet generating device and system. Background technique [0002] Under the atmospheric pressure environment, the low-temperature plasma jet generated based on the dielectric barrier discharge method has received more and more attention because of its wide application in the fields of surface modification and biomedical treatment, and has a good development prospect. However, the current plasma jet generating device is still in the exploration stage. Due to the large energy loss in the tube, the formed jet is short in length, narrow in diameter and low in energy, which makes the treatment effect of the jet application poor. Studies have shown that the quality of the plasma jet has an important relationship with the structure of the generating device. At present, most of the existing plasma jet tubes adopt a coaxial straight tubular structure. The discharge electrode s...

Claims

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Application Information

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IPC IPC(8): H05H1/24
CPCH05H1/2406H05H1/2465
Inventor 王谦刘熊王思齐甘汶艳李思全李永福彭华东任啸李小平汪金刚
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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