RU907U1 - Plasma torch - Google Patents

Abstract

1. A plasma torch containing a nozzle inside which a spring-loaded electrode holder with a replaceable electrode is coaxially mounted for axial movement, characterized in that the electrode holder is hollow, radial channels are made in it and in the cylindrical part of the nozzle, while the nozzle and electrode holder with a replaceable electrode are electrically isolated . 2 The plasma torch according to claim 1, characterized in that cooling fins are made on the electrode holder.

Description

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A useful model refers to the plasma treatment of metals, in particular, to devices for plasma cutting and facets of ferrous and B ferrous metals.

A plasma torch is known which contains a plasma-forming nozzle, a center / high electrode, cooling and gas supply systems, and also an additional electrode, axially spring-loaded II.

Known plasmatron 2, adopted for the prototype, having a casing with a nozzle fixed in it, inside which a rod electrode is coaxially mounted, a fir-tree with a replaceable electrode is mounted. Axial sticking of the electrode to the spruce is carried out, with the help of a prince / snive-barker. In the initial position, the electric holder s.shm shm electrode and the nozzle are short-circuited. When voltage is applied, the spring mechanism moves the electrode away from the nozzle, as a result of which an arc is ignited between electrode 01, I and the nozzle.

The main disadvantage of the above analogues is the design complexity, low reliability, significant mass and dimensional indicators and the inability to quickly change electrodes.

The utility model is based on the task of creating a plasmatron, which allows manual cutting and soldering of ferrous and non-ferrous metals and SPL8BOV, I have a maximally simplified design, reduced weight and size, and an enhanced operating ratio.

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The task is solved. -that,, in the .usaJsMO throne containing the nozzle., inside of which it is coaxially established, it is possible axially :::,;

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the nozzle and the electr. are holding a spruce tree with an electrically connected electrode. They are electrically milled. Our result is also achieved when the ribs ohm; 1a} 1 are barely mounted on the electrode.

Useful, yudel or slugging, Figure 1 is a GENERAL view of a plasma torch in a longitudinal section, FIG. 2 is a section of Ag-A on amg, I.

Plazkutron contains a hollow electrode holder 1, on which, using a threaded connection, a replaceable electrode 2.3 is installed. The end face of electrode 2 is pressed into a cylindrical insert 3 made of refractory metal (for example, tungsten metal). 3 electrode holder I made radial channels 4 gas supply.

An insulating cable is freely installed on the electrode holder I. sleeve 5 with the possibility of their mutual axial movement, as well as returning the wire: 1 pin 6. A replaceable plasma-forming nozzle 7 is fixed; on the insulating sleeve 5. 3 p. has a common electrical connection with the plasma-forming nozzle 7 .3 the initial position 1 And there is a gap between the replaceable electrode 2 and the nozzle 7 „

The plasma torch works as follows. Through the cavity at the electrode holder I and the radial groove: a1L 4, gas is supplied to the cavity II of the plasma torch (nalshler, air). In this case, part of the total gas flow leaves the cavity of the plasmatron II into the atmosphere through the axial central channel; and 8 of the p-gas-forming nozzle 7, and a plasma jet is formed from it. The other part of the gas flow from the internal cavity .II leaves the atmosphere radial channels 9 of the cylindrical nozzle 7. Nalshch ribs on the electrode holder and the separation of gas: flows provides eff (effective cooling of the plasma torch parts.

To excite the arc on duty, the stasma forming nozzle 7 is moved along the axis of the electrode holder I and even the gap is shortened, the electrode 2 is the plasma forming nozzle 7. Since the plasma forming nozzle 7 is in electrical communication with the workpiece 1C, then

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when the gas-forming nozzle 7 returns to its original state (i.e., when the electric connection is broken, electrode 2 — plasma-forming nozzle 7) by electrode 2 and the plasma-forming nozzle is released. 7, a standby arises, which is blown out by gas from a plasma-shaped one. Its nozzle 7 is through the axial central icanai 8. When the standby arc contacts the workpiece 10, the standby arc goes into the main one.

The designed plasmatron, weighing no more than 350 G, was used for manual cutting and brazing of brass and silver-containing solders of ferrous and non-ferrous metals and alloys at IC-fSG A currents, while the switching duration was 6C / S for a five-year operation cycle. The maximum thickness of the metal being cut is 2-5 im (gas-carbon. Sta / xb).

During the tests, overheating of the plasma torch was not observed, and a high stability of the plasma torch was noted, including when supplied with pulsating pressure.

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Claims (1)

1. A plasma torch containing a nozzle inside which a spring-loaded electrode holder with a replaceable electrode is coaxially mounted for axial movement, characterized in that the electrode holder is hollow, radial channels are made in it and in the cylindrical part of the nozzle, while the nozzle and electrode holder with a replaceable electrode are electrically isolated . 2 The plasma torch according to claim 1, characterized in that cooling fins are made on the electrode holder.