CN2566580Y

CN2566580Y - High power air plasma generator

Info

Publication number: CN2566580Y
Application number: CN 02276174
Authority: CN
Inventors: 王忠义; 黄少青
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-08-21
Filing date: 2002-08-21
Publication date: 2003-08-13
Anticipated expiration: 2012-08-21

Abstract

An inactive gas plasma generator used in the world at present has the defects of complicated structure, expensive material, high manufacture cost, difficult operation and maintenance and high expense, and the air plasma generator is not provided with industrial products at all. The utility model provides a high power air plasma generator which is composed of a housing, cathodes and each anode which are arranged in the housing and are insulated and isolated one another, a pipeline for cooling each electrode, and an air filling pipeline for filling an operation air medium to the cavity of the plasma generator. The utility model is characterized in that a great anode, a second anode, a small anode and cathodes are arranged in the housing from up to down, and insulation isolation layers are arranged among each electrode which is fetched out from the housing by a leading line. The great anode segment of the outer wall of the housing is provided with a magnetic coil, and an air filling channel for filling air to the cavity of the plasma generator is arranged between the anodes and the wall of the housing. The utility model has the advantages of simple structure, convenient maintenance, low manufacturing and operation cost, etc., and is suitable for industrial application.

Description

A kind of high-power air plasma generator

Technical field

The utility model relates to a kind of plasma generator, definitely says so to relate to a kind of high-power air plasma generator.

Background technology

, is to be working material with the inert gas substantially at present in the world at the plasma generator of usefulness, applied power little from tens kilowatts big to several thousand thousand watts.Because its complex structure, material expensive, manufacturing cost height, useful life are short, the operation maintenance difficulty is big, the expense height, people begin to turn to cost low be the developmental research of the plasma generator of working material with the air.To at present, still do not have industrial products and use, have only low power device in the laboratory, to manufacture experimently operation, be exactly an example wherein as the 40KW air plasma generator of Tsing-Hua University.

Summary of the invention

Goal of the invention of the present utility model is: overcoming with the inert gas is the above-mentioned shortcoming that the plasma generator of working material exists, for the user provides that a kind of manufacturing operating cost is low, dismounting is easy to maintenance, processing ease, long service life, stripped generator such as broad-spectrum high-power air.

Goal of the invention of the present utility model realizes by implementing following technical proposals:

A kind of high-power air plasma generator, by shell, be loaded on the assemblies such as loading line that plasma generator cavity that pipeline that emitting cathode separated from one another in it and each accelerating anode, target and each anode cool off and target and anode form fills with the air working media and constitute, it is characterized in that: in housing, from bottom to top big anode, insulating barrier, second plate, insulating barrier, primary anode, insulating barrier and emitting cathode be housed in regular turn; Each electrode each has draws housing; On the housing outer wall of one section on big anode, the field coil that is used to retrain air plasma is housed; Be provided with the filling channel that in the plasma generator cavity, charges into the air working media between anode and housing wall.

Additional technical feature is: the 1. pipeline that each electrode is cooled off is mounted in the water-cooled pipeline on the plasma generator shell.2. near the cathode emission surface, on housing, have cathode surface near zone to emitting electrons and fill filling channel with the protectiveness inert gas.Operation principle of the present utility model is as follows: the plasma arc power provides plasma generator required enough electric energy, waits stripped generator to connect required cold water and working gas simultaneously, and adjusts to required value.Start radio-frequency generator, between negative electrode and the primary anode " igniting ", between the two poles of the earth, cause plasma arc, start direct current (150A) contactor, the Plasma Arc Column that forms between negative electrode and the primary anode is transferred on the second plate, restart direct current (300A) contactor, make and second plate between the Plasma Arc Column that forms transfer on the big anode, the rotate path of required plasma arc is constant substantially, but strengthened the rotary speed of plasma arcs, the plasma arcs zone of generation is strengthened, helped commercial Application.

Advantage of the present utility model is: owing to adopted negative electrode and each anode simple structure separated from one another from top to bottom on the layout of electrode, therefore on design of shell, can adopt the form of segmentation combination, as shell can being made the form of housing and negative electrode top cover combination, thereby install for the dismounting and change of installation and maintenance, the particularly negative electrode of generator assembly and bring very big convenience; Second plate, big anode and the about field coil of bundle are set, can retrain the length of elongating the plasma electrically arc flame, the working region is strengthened, widened range of application greatly; And about plasma electrically arc flame is restrainted in the magnetic field of the field coil that should retrain, and can increase the useful life of big anode; Compare with the inert gas plasma generator, make with maintenance cost and all reduce greatly.

Description of drawings Fig. 1 is the utility model vertical profile structural representation.Mark among the figure: 1 is the air plasma generator shell; 2 is big anode; 3 is second plate, and 4 is primary anode, and 5 is negative electrode; 6 is that insulating barrier, 7 is that charge of air passage, 8 is that confining magnetic field coil, 9 is cathode leg; 10,11,12 be respectively primary anode, second plate, big anode tap, 13 are the water cooling pipeline, and 14 is protectiveness nitrogen filling channel; 15 is the cathode base as emitter, and 16 is the plasma electrically arc flame.

Embodiment

The 300KW air plasma generator

This generator is by stainless steel casing 1, be loaded on the big anode of installing in regular turn in it 2 from bottom to top, insulating barrier 6, second plate 3, insulating barrier, primary anode 4, insulating barrier and have the negative electrode 5 of emitter core 15, respectively with negative electrode, primary anode, second plate is connected with big anode draws the outer lead-in wire 9 of housing, 10,11,12, be contained in the confining magnetic field coil 8 on the big anode casing outer wall, be arranged on each

section anode

2,3,4 and housing 1 wall between, in the generator cavity, charge into the filling channel 7 of air working media, be sleeved on each

segment electrode

2,3,4, outside 5 Stainless Steel Shell 1, cool off the water-cooled pipeline 13 of each electrode, be arranged near on the negative electrode and housing wall of cathode emitter core 15, charge into the filling channel 14 of protectiveness nitrogen to cathode emitter wicking surface near zone, wait all assemblies to constitute; Wherein: cathode emitter core 15: be the copper post that oxygen-free copper is made, pole piece copper post φ 30mm, high 30mm; Cathode shell 5: be the cylindrical housings of the no end that nickelles stainless steel is made, external diameter φ 70mm, internal diameter φ 40mm, high 55mm, primary anode 4: be the supreme cylindrical housings of going to the bottom of nickelles stainless steel manufacturing, external diameter φ 110mm, internal diameter

φ 60mm, height is 60mm; Second plate 3: be the supreme cylindrical housings of going to the bottom of nickelles stainless steel manufacturing, external diameter φ 115mm, in

Footpath φ 85mm, height is 25mm; Big anode 2: be the supreme cylindrical housings of going to the bottom of nickelles stainless steel manufacturing, external diameter φ 118mm, internal diameter

φ 90mm, height is 250mm; Each interelectrode thickness of insulating layer is 5mm; Negative electrode operating voltage :-300V primary anode voltage :-200V second plate voltage: the big anode voltage of-100V: the galvanization 150A of confining magnetic field coil institute of water-cooled is arranged, confining magnetic field 500 Gausses of generation in the 0V; The air working media speed in the generator cavity of feeding be the 24-26 cubic meter/hour, pressure is 0.4-0.6Mpa, the water-cooled pipeline enters temperature 0--25 ℃ of cooling water, pressure 0.4-0.6Mpa, protectiveness nitrogen injection rate be the 3.2-3.5 cubic meter/hour, the length that the plasma electrically arc flame that plasma generator produces stretches out accent is 40cm, and the duration and degree of heating temperature is 7000 ℃; Since can be in manufacturing and designing with the input and output spout, electrode nipples etc. place generator shell one side, bring convenience to use; Take the primary anode bore, increased the arc voltage of plasma generator; The working life of the utility model plasma generator can reach 100 hours; With compare with scale inert gas plasma generator, it is made with operation expense all reduction greatly.

Claims

1, a kind of high-power air plasma generator, by shell body, be loaded on the water-cooled pipeline that the emitting cathode that is separated from each other in it and each accelerating anode, target and each anode cool off, and the plasma generator cavity that forms of target and anode fills with all assemblies of the loading line of air working media and constitutes, and it is characterized in that: big anode (2), insulating barrier (6), second plate (3), insulating barrier (6), primary anode (4), insulating barrier (6) and emitting cathode (5) are housed in housing (1) from bottom to top in regular turn; Each electrode each has lead-in wire (12) (11) (10) (9) and draws outside the housing (1); On housing (1) outer wall of (2) one sections on big anode, the field coil (8) of constraint air plasma is housed; Be provided with the filling channel (7) that in the plasma generator cavity, charges into the air working media between anode and housing wall.

2, according to the described high-power air plasma generator of claim 1, it is characterized in that: the pipeline that each electrode (5), (4), (3), (2) are cooled off is mounted in the water-cooled pipeline (13) on the plasma generator shell (1).

3, according to the described high-power air plasma generator of claim 1; it is characterized in that: near cathode emission surface (15), on housing (1), have cathode surface zone to emitting electrons, fill filling channel (14) with the protectiveness inert gas.