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Automatically ignited microwave plasma torch device

A microwave plasma, automatic ignition technology, applied in the plasma torch technology and the fields of chemistry and measurement, can solve the problems of increasing the complexity of the system, potential safety hazards, and impact, etc.

Pending Publication Date: 2017-05-31
中控全世科技(杭州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional ignition method of the microwave plasma torch has certain shortcomings in its application. For example, if it is used as an atomic emission spectrometer product, if the ignition method uses a screwdriver to touch the top of the middle tube and the inner tube, there will be a safety hazard for the operator to be clicked, and It will lead to microwave leakage. If the ignition method of Tesla coil discharge is used, an additional high-voltage discharge function module will be added, thereby increasing the complexity of the system, and the existence of high-voltage discharge needles will affect the electromagnetic field of the microwave plasma torch, which may affect system stability

Method used

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  • Automatically ignited microwave plasma torch device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] see figure 1 , a microwave plasma torch device with automatic ignition, consisting of an outer tube (1), a middle tube (2), an inner tube (3), a spacer (4), a microwave coupling interface (5), and an outer tube microwave opening (6 ), a coupling rod (7), a coupling ring (8), a reflective end face (9), and an adjustment piston (10), the outer tube (1), the middle tube (2), and the inner tube (3) have three metal tubes Shaft structure, between the middle tube (2) and the inner tube (3), there is a metal spacer (4) to ensure coaxiality and adjust the electromagnetic field distribution, and the coupling ring (8) is set on the outer wall of the middle tube (2), microwave coupling The interface (5) is arranged on the outer tube (1) to form the outer tube microwave opening (6), the coupling rod (7) is fixed on the coupling ring (8), and is located between the outer tube microwave openings (6), and the outer tube (1) There is a reflective end face (9) between it and the middle...

Embodiment 2

[0034] see figure 1 A microwave plasma torch device with automatic ignition, the automatic ignition of the microwave plasma torch requires the formation of a local strong electric field in the plasma formation area at the open end to form an electric breakdown, and this strong electric field can be adjusted by adjusting the middle tube (2) and the inner tube (3) Relative position realization. In order to ensure the normal operation of the torch, it is necessary to be equipped with a microwave source that matches the design of the torch, such as a 200W continuous wave output 2.45GHz microwave source.

[0035] The inner diameter of the outer tube (1) is preferably 20 mm, the outer diameter of the middle tube (2) is preferably 7 mm, and the inner diameter of the inner tube (3) is preferably 2 mm. The wall thickness of the middle pipe (2) is 1mm, and the wall thickness of the inner pipe (3) is 0.5mm.

[0036] Described torch tube working gas selects Ar gas, and working gas (12) ...

Embodiment 3

[0045] see figure 2 , is a schematic diagram of an automatic ignition microwave plasma torch atomic emission spectrometer device.

[0046] The core part of the microwave plasma torch atomic emission spectrometer is the microwave source (16) and the torch tube (17). The microwave source (16) provides the microwave energy to maintain the continuous operation of the plasma. The microwave frequency for civil use is more 915±50MHz And 2450±50MHz, within the power range of about kilowatts required by the plasma microwave source, a continuous wave high-power magnetron of 2450±50MHz is generally selected. The core part of the microwave source (16) is the magnetron, and the power supply (15) supplies power to the magnetron, and the closed circuit protection device (20) monitors according to the state of the microwave source (16) to prevent the magnetron from being too large. If the temperature of the microwave source is too high, if an abnormal situation occurs, the microwave output ...

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Abstract

The invention provides an automatically ignited microwave plasma torch device. The automatically ignited microwave plasma torch device consists of an outer tube, an intermediate tube, an inner tube, a space ring, a microwave coupling interface, an outer tube microwave opening, a coupling rod, a coupling ring, a reflection end face, and a regulating piston. The microwave plasma torch is formed by a section of the opened metal coaxial resonant cavity of three coaxial tubes, and the microwave is used for forming the plasma torch at the opening end. The automatically ignited microwave plasma torch device is capable of changing the ignition mode of the microwave plasma torch, and enabling the torch tube to realize the autoignition without an additional device through regulating the relative position of the inner tube of the torch tube, so the usability of the microwave plasma torch device is greatly enhanced, the effect of a high-pressure ignition needle to the design of the microwave shielding structure can be eliminated, the device structure is simplified, and the reliability and the stability of the device are enhanced. The microwave plasma torch is used for the plasma source for the analysis of the atomic emission spectroscopy, and also used for the plasma source for the technical field of the chemistry and measurement.

Description

technical field [0001] The invention belongs to the field of microwave plasma torch technology and chemistry and measurement technology, in particular to a microwave plasma generating device, in particular to a microwave plasma torch device with automatic ignition. Background technique [0002] Microwave plasma torch was proposed by Professor Jin Qinhan et al. A microwave plasma forming device (the corresponding application patent number is CN 94205428.8), which can be used in the fields of light source for atomic emission spectrum analysis, ion source for atomic spectrum, gas decomposition, etc. The device has a metal three-tube coaxial structure. The plasma is formed on the upper surface of the middle tube and the inner tube and extends into the atmosphere. The ignition method is to use a Tesla coil or a screwdriver to contact the top of the middle tube and the inner tube to form an instantaneous short circuit. The electric spark ignites the plasma (Jin, Q., et al., A mic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05H1/30
CPCH05H1/30
Inventor 金伟朱旦金钦汉
Owner 中控全世科技(杭州)有限公司
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