SU559787A1 - Plasma torch - Google Patents

Description

surrounded by insulator 11. A water-cooled nozzle 12 is installed on isolator I with a central channel 13 located coaxially with concentrically active insert 10. The above listed parts of replaceable part 3 are fastened with casing 14 and nut 15.

In the replacement part 3, rubber catch rings are installed at the appropriate places to seal the cooling channels and the nlazomoobrazuyu gas. The inclining of the replaceable part 3 to the stationary part 1 is carried out with the help of the nut 16. At the same time, the end face of the electrode holder 8 mates with the end face of the stationary part 1 through a sealing gasket 17. In the body of the electrode holder 8, three parallel to its axis of the channel, extending onto the end surface, are made electrode holder 8 mating with the end surface of the stationary part 1. Channel 18 is designed to supply plasma-forming air to the nozzle chamber, channel 19 for taking cooling water out of the replacement part 3, the channel 20 for supplying cooling water to the electrode 9. The cooling electrode 9 water is supplied through the channel 21 extending concentrically with the axis of the electrode holder 8 from the side of the electrode 9. The radii of the channels 20 and 21 are chosen so that the distance between the axis of the electrode holder 8 and the axis channel 20 was less than the sum of the radius of channels 20 and 21. At the same time, the sum of the lengths of channels 20 and 21 is greater than the length of the electrode holder 8, count from the end surface to the exit of channel 21.

This arrangement of channels 18, 19, 20 and 21 allows to obtain the minimum diameter of the axis of the electrode holder while maintaining the full symmetry of the cooling conditions of the electrode 9, which is fundamentally necessary for stable operation of the electrode 9. Cooling of the replacement part 3 is performed sequentially, starting with channel 20 and ending Camping channel 19.

The fastening of the replacement part 3 and the stationary 1 is carried out in one movement. At the same time, the cutting part 3 of the plasma torch is replaceable.

at the same time, it is connected to the communications of cooling water, plasma gas and electric current.

F o r mula inventions

Plasma torch for arc processing of materials consisting of a stationary part with channels for plasma-forming and cooling media matched with the corresponding channels parallel to the axis of the plasma torch and brought to the end of the electrode assembly of the stationary part, the channel for feeding the cooling medium from the working end of the electrode assembly

concentric with its axis, characterized in that, in order to increase productivity, reduce the dimensions of the plasma torch while maintaining the reliability of its operation, the channel for supplying the cooling medium from the end

the stationary part is made eccentric to the axis of the electrode assembly and is coupled with a concentric channel so that the distance between the axis of the electrode holder and the axis of the eccentric channel is less than the sum of the radii of the concentric and eccentric channels, and the sum of their lengths is longer than the length of the electrode node.

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8UL

Rig.

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