CS256076B1 - Burner's gas nozzle for arc welding in protective atmosphere - Google Patents

Description

The present invention relates to a gas shielded gas nozzle for shielded arc welding, which reduces the gas flow rate, directs it, and evenly distributes it around the gas nozzle.

The gas nozzle consists of a body (1), a housing (2), an insulating housing (3) and a gas supply pipe (4). In the body (1), a long inlet duct (7) is formed which opens into the lower peripheral space (8) connected to the expansion space (10) by the passage ducts (9), the cross-sections of which gradually decrease from the water duct (7). The expansion space (10) is terminated by distribution channels (11). 2

256076 256076

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a design of a shielded gas nozzle for a shielded gas welding torch to reduce gas flow velocity, alignment, and uniform distribution around the gas nozzle. In previous burners, gas is fed through multiple openings. Typically, 10-18 L is used to form the protective atmosphere. . min ~ J gas. In this amount, the inlet velocity of the gas flowing through the apertures is large. When exiting the openings, there is a gas swirl. The gas hits the gas nozzle walls or the burner core. Said swirl impairs the protection of the welding bath. The protection quality deteriorates with the rising distance from the edge of the gas nozzle. A cooling fluid is used to cool the nozzle, which flows through the openings of the gas nozzle body. The cooling unit is used as the source of cooling liquid.

These drawbacks are addressed by the gas shielded gas nozzle of the arc shielded arc torch according to the invention, which consists of a body, a housing, an insulating sleeve and a gas supply pipe and is characterized in that a long inlet channel extends into the lower peripheral space, which is through the passageways connected to the expansion space terminated by the distribution channels. The cross-sections of the passage channels are gradually reduced in the direction of the supply channel cd. The advantage of this solution is the possibility of construction of a shorter gas nozzle and thus of the whole burner. It also allows good protection of the welding bath at a greater distance from the edge of the gas nozzle. The flow gas is distributed evenly over the circumference of the gas nozzle space. The protective atmosphere is uniform throughout the gas nozzle circuit. At the same time, the gas is used to cool the gas nozzle, so cooling with cooling liquid is not required for normal conditions. Only one gas supply leads to the gas nozzle itself. The gas nozzle is structurally simple. It is fixed to the burner core by an insulating sleeve, thereby also being electrically insulated. The gas nozzle is replaceable and enables a modular burner solution.

The shielded gas burner gas nozzle is shown in the accompanying drawings, wherein Figure 1 is a gas nozzle design and the gas nozzle body is shown in Figure 2.

The shielded gas welding torch gas nozzle consists of a body 1 on which a gas supply tube 4 is inserted and soldered. An insulating housing 3 is pressed and secured in the housing 2. In the body 1, a longitudinal inlet channel 7 is formed which opens into the lower peripheral space 8. This is connected to the expansion space 10 through the passageways 9, the cross-sections of which extend gradually away from the longitudinal supply channel 7 shrink. The expansion space 10 is terminated by the distribution channels 11. The gas flows from the gas supply pipe 4 to the longitudinal supply channel 7, flows into the lower peripheral space 8 and through the passage channels 9 into the expansion space 10. From the expansion space 10 the gas flows through the distribution channels 11 into the space 15 gas nozzles. To direct the gas into the gas nozzle space 15, the radius recess serves on the face of the insulating sleeve 3.

Claims (2)

SUBJECT Gas shielded arc welding torch consisting of a body, a sheath, an insulating sleeve and a gas supply tube, characterized in that a longitudinal supply channel (7) is formed in the body (1) resulting in a lower peripheral r and extends over the entire periphery gas nozzle uniform. At the same time, the gas is used to cool the gas nozzle, therefore cooling under cooling conditions is not necessary under normal conditions. Only one gas supply leads to the gas nozzle itself. The gas nozzle is structurally simple. It is attached to the burner core by an insulating sleeve, which is also electrically insulated. The gas nozzle is replaceable and allows a modular burner solution. A shielded arc torch gas nozzle is shown in the accompanying drawings, in which Figure 1 represents a construction of a gas nozzle and Figure 2 shows a gas nozzle body. The gas nozzle for arc welding in a protective atmosphere consists of a body 1 on which a jacket 2 with a gas supply pipe 4 is slid and soldered. In the housing 2, an insulating sleeve 3 is pressed and secured. In the body 1 a longitudinal supply channel 7 is formed which opens into the lower circumferential space 8. This is connected to the expansion space 10 by the passage channels 9 whose cross-sections extend successively from the longitudinal supply channel 7. decrease. Expansion space 10 is terminated by distribution ducts 11. The gas flows from the gas supply tube 4 to the longitudinal supply duct 7, from there to the lower peripheral space 8 and through the passageways 9 to the expansion space 10. From the expansion space 10 gas flows through the distribution ducts 11 to the gas nozzle space 15. A radial groove at the front of the insulating sleeve 3 serves to direct the gas into the gas nozzle space 15. The cross-sectional area of the passageways (9) decreases progressively in the direction of the supply channel (7).