SU1386402A1 - Torch for gas-shielded arc welding - Google Patents

Abstract

This invention relates to gas shielded welding with fused and non-melting electrodes and can be used in various industries. The goal is to save protective gas when welding at high speeds and in the wind. From the cavity 8 of the chamber to the ventilation axis 7 through an annular groove 11 located concentrically along the lower end of the chamber 7, the compressed air flows under pressure towards the welded product 19 and forms around welding zones and suction zones of a continuous annular barrier barrier 20 preventing the penetration of gas-dust emissions 21 from the welding zone into the surrounding atmosphere. When welding at high speeds and in the wind, an annular barrier barrier 20 prevents the protective gas flow from blowing away from the welding zone. Regulation of the suction mode of gas dust emissions 21 is made by changing the velocity of the injected air from the annular chamber 7 to the suction cavity 12 by moving the chamber 7 relative to the nozzle 5 or rotating the chamber 7 relative to the nozzle 5. An effective aerosol suction improves the working conditions of the welders. 1 hp ff, 2 ill. tilations I CO 00 O5 4 O y Fog.1

Description

This invention relates to gas shielded welding with fused and non-melting electrodes and can be used in various industries.

The aim of the invention is to save shielding gas when welding at high speeds and in the wind and to improve working conditions.

Figure 1 shows the burner, general view, section; in FIG. 2 a section. A-A in FIG.

The burner consists of mouthpiece 1, clamps 2 and insulator 3 fixed on mouthpiece 1. Insulator 3 has a nozzle 4, and in valve 2 there is a nozzle 5 for suction with ejector holes 6 along its perimeter,

On the outer surface of the nozzle for suction 5 a chamber 7 is installed with a cavity 8, ejector holes 9, a fitting 10 for supplying compressed air (gas) and an annular groove 11 along the inner perimeter of the chamber 7. Between the nozzle 4 and the nozzle 5 for suction there is a cavity 12 suction, which is connected to the ventilation system by means of branch pipes 3. Through fitting 14, cavity 5 and holes 16 in mouthpiece 1, protective gas is supplied to the weld zone. A suction hub 17 is mounted on the suction nozzle 5 under the annular groove 1 of the chamber 7, the chamber 7 is mounted on the nozzle 5 with the possibility of relative rotation and longitudinal movement. The conical sleeve 17 is mounted on the nozzle 5 with the possibility of relative longitudinal movement.

The burner works as follows.

After excitation of the electric arc 8, compressed air or gas is supplied to chamber 7 through fitting 10. From the chamber 7, compressed air or gas is supplied under pressure through the ejector holes 9 and 6 into the suction cavity 12 in the direction to the upper end of the nozzle 4. In the lower part of the cavity

A suction pump creates a vacuum, as a result of which the gas mixture from the welding zone is sucked into this cavity and then through the discharge tubes.

13 output to the ventilation system. Simultaneously from the cavity 8 of the camera

1 through an annular groove 11 located concentrically along the lower end of the chamber 7, the compressed air or gas enters under pressure towards the welded product 19, forming

around the weld zone and the suction zone, a continuous annular barrier barrier 20 preventing the penetration of gas dust 21 from the weld zone into the surrounding atmosphere. Besides

In addition, when welding at high speeds, in the wind or through the ring, an annular barrier barrier of 20 n prevents blown-in shielding gas from the welding zone.

The regulation of the suction mode of the gas-bursts 21 is made due to changes in the velocity of the ejected air (gas) from the annular chamber 7 into the cavity 12 of the suction by

moving the chamber 7 on the surface of the nozzle 5 upwards (downwards) or turning it in the horizontal plane while changing the flow area between the ejection openings 9

and 6 chambers 7 and nozzles 5 respectively.

The speed of the outflow of the barrier flow 20 is controlled by changing the flow area of the annular groove 11 by moving the conical sleeve 17 along the surface of the suction body 5 up (down).

It is advisable to use the burner

with automatic and semi-automatic welding with fused and non-melting electrodes in protective gases. The application of the proposed burner design allows for virtually

complete suction of gas and dust emissions from the weld zone due to the location of the | Ejector chamber directly on the surface of the nozzle for suction and creating an annular barrier

a barrier preventing welding aerosol from penetrating into the surrounding atmosphere and preventing the flow of protective gas from being blown away at welding at high speeds or in the wind.

By providing a highly efficient suction aerosol, the working conditions of welders are improved and the level of occupational diseases is reduced.

Technical and economic effect: it achieves for ctieT the saving of protective gas during welding at high speeds, in the wind or through bores, as well as by increasing the productivity of welding works, approximately

5%, by improving the sanitary conditions of the welders.

Claims (1)

1. A torch for gas-shielded arc welding, containing a mouthpiece located inside the nozzle of the supply of protective gas, a nozzle for suction that encompasses the nozzle, characterized in that with the aim of etsonomii protective gas in welding at speeds and in the wind and to improve working conditions, it is equipped with a ca- 15 on the nozzle for suction at the working tormer for compressed air, the driver has a conical bushing with ejector openings with a relative longitudinal circumference and movement. 2, Burner pop-1, characterized in that, in order to regulate the flow rate of the annular air flow. a gap for air passage located at the working end, a nozzle for suction is made with ejector openings connected to the ejector openings of the chamber, and the chamber is installed on the nozzle with the possibility of rotation and longitudinal movement. On the nozzle for suction at the working end, there is a conic sleeve with the possibility of relative longitudinal movement. On the nozzle for suction at the working end, there is a conic sleeve with the possibility of relative longitudinal movement. 2, Burner pop-1, characterized in that, in order to regulate the flow rate of the annular air flow. Srig.G.