CN105338724A

CN105338724A - V-shaped nozzle of plasma torch

Info

Publication number: CN105338724A
Application number: CN201410399269.1A
Authority: CN
Inventors: 慕龙; 黄峥嵘; 熊新阳; 徐勇; 李自兵; 刘军; 池建忠
Original assignee: Xinjiang Corps Modern Green Chlor-Alkali Chemical Engineering Research Center (co Ltd); Xinjiang Tianye Group Co Ltd
Current assignee: Xinjiang Corps Modern Green Chlor-Alkali Chemical Engineering Research Center (co Ltd); Xinjiang Tianye Group Co Ltd
Priority date: 2014-08-14
Filing date: 2014-08-14
Publication date: 2016-02-17

Abstract

The invention discloses a V-shaped nozzle of a plasma torch in the technical field of mechanical equipment. The V-shaped nozzle of the plasma torch comprises an anode outlet electrode, a plasma torch seat, a cathode outlet electrode, an insulating sleeve and a compression ring. Outer surfaces of lower half portions of the anode outlet electrode and the cathode outlet electrode are provided with insulating material or heat resistant material, and a certain gap is kept between the outer surfaces of lower half portions of the anode outlet electrode and the cathode outlet electrode and the plasma torch seat, the insulating property between the outlet electrodes and the plasma torch seat can be improved, under combined action of tangential protective gas entering from the compression ring and staying at the outsides of the outlet electrode, a heating area of plasma arcs can be more concentrated, and the plasma arcs can be stably maintained at the centers of the outlet electrodes, intersection of the plasma arcs are benefited, the outlet electrodes and the plasma torch seat can be prevented from burning, so the plasma torch is stable in work, long in service life, safe and reliable.

Description

A kind of spout of V-type plasma torch

Technical field

The invention belongs to technical field of mechanical equipment, relate to a kind of parts of plasma torch, especially a kind of spout of V-type plasma torch.

Background technology

V-type plasma torch is made up of anode beam and cathode leg, and anode and negative electrode are respectively at the two ends of anode beam and cathode leg, and the electric arc of anode beam and the electric arc of cathode leg cross after respective spout electrode, to form V-shaped electric arc.The features such as it is high that V-type plasma torch has efficiency relative to straight line torch, and the life-span is long, but due to the plasma torch of V-structure more complicated than straight line plasma torch in design, particularly at the nozzle of plasma torch.According to experimental studies have found that of 5MWV type hydrogen plasm torch before, because the electric arc of plasma torch spout section is long, the equivalent resistance being equivalent to plasma arc increases, in the voltage drop of plasma torch nozzle all at about 2000V, simultaneously, two strands of high temperature, Gao Han, jet is at a high speed spraying the moment crossed, be in the particle of upper state, electronics collides mutually, flow location form is complicated, physicochemical characteristics is enlivened, be easy to cause puncturing between exit electrodes and base, electric arc is produced between exit electrodes and plasma torch base, form the discharge loop of anode tap-anode arm electric arc-anode export electrode-plasma torch base-cathode outlet electrode-cathode leg electric arc-cathode taps.Electric arc acts directly on exit electrodes and plasma torch base, and serious ablation exit electrodes and plasma torch base affect job stability and the useful life of plasma torch, also may cause security incident.

Summary of the invention

The object of the present invention is to provide a kind of structure simple, reliable, can a kind of spout of V-type plasma torch of operative constraint plasma jet, reach constraint arc, solve the problem that exit electrodes and plasma torch base discharge.

A kind of spout of V-type plasma torch, comprise exit electrodes, insulating case, plasma torch base and compression ring, plasma torch base opens the hole of two inclinations, axis is V-shape, exit electrodes cylindrical order arranges insulating case, compression ring, together be embedded in the hole of plasma torch base, the lower surface of exit electrodes, lower than plasma torch base lower surface, is provided with certain gap between the bottom periphery of exit electrodes and plasma torch base.

The lower surface of described exit electrodes can be concordant with plasma torch base lower surface.

Described plasma torch base lower surface is a conical camber, or is arc-shaped curved surface, is suitable for the air-flow constraint electric arc formed.

The diameter of described exit electrodes is D, and draw ratio is 0.5-1.5.

The geometry intersection point of two described outlet electrode axis line L1 and L2 is C, be respectively A and B, and the length of AC is less than 3D with the upper surface intersection point of anode export electrode and cathode outlet electrode.

The angle of two described outlet electrode axis line L1 and L2 is α, α value is 30-120 °.

The gap of 2-8mm is had between described exit electrodes and electrode tip holder.

Described exit electrodes and plasma torch base are equipped with cooling water channel, carry out coolant outlet electrode and the plasma torch base heat energy due to electric arc heat radiation.

There is the protection gas compression ring being provided with several tangential holes the lower end of described insulating case.

The spout of described a kind of V-type plasma torch, is applicable to the plasma torch that supply voltage scope is run in 1kV-10kV scope.

beneficial effect

The invention provides a kind of spout of V-type plasma torch, by the setting of electrode and torch holder structure, reduce the voltage drop of plasma torch spout section, improve the insulation property between exit electrodes and plasma torch base, have the acting in conjunction of the tangential protection gas entered by compression ring in the outside of exit electrodes under, make the hot-zone of plasma arc more concentrated, the stable center maintaining exit electrodes, be conducive to crossing of electric arc, avoid discharging and ablation because producing between exit electrodes and plasma torch base, make plasma torch working stability, long service life, safe and reliable.

Accompanying drawing explanation

Fig. 1 is the cutaway view of the spout structure of a kind of V-type plasma torch of embodiment 1;

Fig. 2 is the cutaway view of embodiment 1 exit electrodes;

Fig. 3 is the cutaway view of embodiment 2 exit electrodes;

Fig. 4 is that the A-A of Fig. 1 is to cutaway view;

Fig. 5 is the cutaway view of the spout structure of a kind of V-type plasma torch of embodiment 2;

Drawing reference numeral: 1 be exit electrodes, 2 be plasma torch base, 3 be insulating case, 4 be compression ring, 5 be annular space, 6 be reducing, 7 be inlet opening, 8 be apopore, 9 for air admission hole.

Embodiment

Below in conjunction with accompanying drawing, the present invention will be further described.

Embodiment 1, with reference to accompanying drawing 1,2,4, comprise anode export electrode 1, plasma torch base 2, cathode outlet electrode 1, insulating case 3, compression ring 4, anode export electrode 1, plasma torch base 2, cathode outlet electrode 1 make by oxygen-free copper, and are provided with cooling water channel, plasma torch base about 2 establishes two holes, and the taper surface of interior sky is established in centre, forms plasma torch base lower surface with hole, two, left and right, the setting of the lower surface of exit electrodes is lower than plasma torch base lower surface, plasma torch base lower surface is a conical camber, the diameter of anode export electrode 1 and cathode outlet electrode 1 is D, draw ratio is 0.5-1.5, the geometry intersection point of central axis L1 and L2 of two electrodes is C and has angle as the isosceles triangle ABC of α with the line structure of center A and B of its two entrance disc, the value of α is 30-120 °, A, B is respectively the center of anode export electrode 1 and cathode outlet electrode 1 entrance disc, AC, the length of BC should be less than 3D(and reduce AC, the length of BC, the voltage drop of plasma torch spout section can be reduced), more be conducive to crossing of electric arc, form complete V-shaped electric arc, improve the stability of electric arc.The gap 5 of 2-8mm is had between the outer surface of the Lower Half of anode export electrode 1 and cathode outlet electrode 1 and plasma torch base 2, compression ring 4 is at anode export electrode 1 or between cathode outlet electrode 1 and plasma torch base 2, circumferencial direction is distributed with several tangential air admission holes, protection gas is passed into by pore 9, after compression ring 4 distributes, enter annular space 5, improve the puncture voltage between exit electrodes 1 and plasma torch base 2, and resistance to elevated temperatures, avoid electric discharge nearby and the ablation of exit electrodes and plasma torch base 2, protection exit electrode simultaneously, constraint, stable arc.Insulating case 3 is at anode export electrode 1, between cathode outlet electrode 1 and plasma torch base 2, play insulating effect, cooling water is by water inlet 7, exit electrodes 1 is entered through insulating case 3, flow out through insulating case 3 and delivery port 8 again, take away heat, effectively prevent electrode because of overheated and ablation, plasma torch long-term stability can be made to run.

Embodiment 2, with reference to accompanying drawing 1-3, difference from Example 1 increases by a reducing 6 in the endoporus lower end of cathode outlet electrode 1 and anode export electrode 1, can effectively compress by article on plasma fluidic vectoring thrust, and constraint electric arc, increases and spray intensity, stable arc.

Embodiment 3, with reference to accompanying drawing 1-5, the present embodiment and above-described embodiment difference are that its plasma torch base lower surface is arc-shaped curved surface, and be suitable for the air-flow constraint electric arc formed, the lower surface of exit electrodes is concordant with plasma torch base lower surface.

Claims

1. the spout of a V-type plasma torch, comprise exit electrodes, insulating case, plasma torch base and compression ring, plasma torch base opens the hole of two inclinations, axis is V-shape, it is characterized in that exit electrodes cylindrical order arranges insulating case, compression ring, together be embedded in the hole of plasma torch base, between the bottom periphery of exit electrodes and plasma torch base, be provided with certain gap, the lower surface of exit electrodes lower than or flush in plasma torch base lower surface.

2. a kind of V-type plasma torch spout according to claim 1, is characterized in that described plasma torch base lower surface is a conical camber, or is arc-shaped curved surface.

3. a kind of V-type plasma torch spout according to claim 1, it is characterized in that the diameter of two exit electrodes is D, draw ratio is 0.5-1.5.

4., according to the arbitrary described a kind of V-type plasma torch spout of claim 1,2, it is characterized in that the geometry intersection point of two outlet electrode axis lines is C, be respectively A and B with the upper surface intersection point of anode export electrode and cathode outlet electrode, and the length of AB is less than 3D.

5., according to the arbitrary described a kind of V-type plasma torch spout of claim 1-3, the angle that it is characterized in that two outlet electrode axis lines is α, α value is 30-120 °.

6., according to the arbitrary described a kind of V-type plasma torch spout of claim 1-4, it is characterized in that there is certain gap between the bottom periphery of exit electrodes and plasma torch base holes, scope is 2-8mm.

7., according to the arbitrary described a kind of V-type plasma torch spout of claim 1-6, it is characterized in that exit electrodes and plasma torch base are equipped with cooling water channel.

8. a kind of V-type plasma torch spout according to claim 1, is characterized in that the lower end of insulating case is provided with the protection gas compression ring with several tangential holes.

9., according to the arbitrary described a kind of V-type plasma torch spout of claim 1-8, it is characterized in that a kind of spout of V-type plasma torch, be applicable to the plasma torch that supply voltage scope is run in 1kV-10kV scope.