RU75457U1 - MULTI-TORCH BURNER - Google Patents

Abstract

The utility model is aimed at improving the reliability of the burner and ensuring the same technological regime over the entire area of the heat-treated surface.

The specified technical result is achieved in that the burner contains a barrel with channels for supplying oxygen and combustible gas, a tip and a mixer, with a mouthpiece screwed to it. The gas channels of the mouthpiece are interconnected by inclined openings, the cross-sectional area of which is equal to the cross-sectional area of the mixing chamber, and the outlet nozzles are made with a large number of small-diameter holes, and their total area is larger than the mixing chamber. The mouthpiece is equipped with support roller wheels, and the nozzle part of the mouthpiece is equipped with a water cooling system. 2 C.p.F., 3 ill.

Description

The utility model relates to two-wire burners for burning gaseous fuels and can be used for heat treatment of natural stone slabs, as well as in various branches of engineering where heating of large surfaces of parts is necessary.

Known multi-torch burners containing a barrel with valves for supplying oxygen and combustible gas, an injection system, a mixer and a mouthpiece, which is equipped with gas channels interconnected by two holes at its edges and a single-row arrangement of outlet nozzles (see works of VNIIAVTOGENMASH, issue XV "Thermal cutting, welding, surfacing, gas control ", publishing house" Engineering ", Moscow, 1968, p.64). The disadvantages of such a burner are the heterogeneity of the flames along the length, the possibility of the occurrence of reverse shocks due to the increased diameter of the holes of the gas nozzles.

Multi-torch burners of this type with the injector and mixing chamber located directly at the mouthpiece are quite massive and therefore inconvenient in operation and, as a result, it is not possible to maintain the same thermal regime during heat treatment of natural stone slabs and metal surfaces.

Multi-torch burners heat up quite quickly in the nozzle part, which often leads to pops and blowbacks, and the known additional devices for cooling the torch with running water complicate its construction and operation, as well as increase the weight of the burner, create inconvenience in operation and reduce the effective power in the flame.

The problem to which the claimed utility model is directed is to increase the reliability of the burner due to better mixing of the gas mixture and its uniform distribution along the length

mouthpiece, in eliminating back impacts, as well as in ensuring the same technological regime of heat treatment over the entire area of the treated surface.

The technical result is achieved in that in a multi-torch burner containing a barrel with oxygen and combustible gas supply channels and control valves installed in them, a nozzle with an injection system, a mixer with a mouthpiece attached to it, according to the proposed utility model, the gas channels of the mouthpiece are connected by inclined holes, the cross-sectional area of which is equal to the cross-sectional area of the mixing chamber, and the output nozzles are made of a large number of small diameter holes located concentrically in groups along the mouthpiece, and their total area is larger than the area of the mixing chamber.

To maintain the distance from the nozzle of the mouthpiece to the surface to be treated in order to ensure the same thermal regime of the heat-treated surface, the mouthpiece is equipped with roller wheels.

To prevent overheating of the mouthpiece, the burner is equipped with a water cooling system for its nozzle part - the primary source of heating of the entire mouthpiece. Depending on the thermal power of the mouthpiece, the supplied amount of water for its cooling is regulated by a water valve.

The inventive utility model is illustrated by drawings, which depict:

figure 1 - General view of the burner;

figure 2 - section aa (figure 1);

figure 3 is a view of B (figure 2).

The multi-nozzle burner contains a barrel 1 with a tip 2 and a mouthpiece 3. In the barrel 1 there are oxygen and combustible gas supply channels in which the corresponding control valves 4, 5 are installed. The tip 2 consists of a nozzle 6, oxygen and combustible gas pipes 7, 8 and tip 9. Attaches tip 2 to the barrel 1

with a union nut 10. An injector 11 with a calibrated hole 12 is installed in the head 9. A mixer 13 is attached to the head 9 using a union nut 14. A mouthpiece 3 is screwed onto the mixer 13. The gas channels 15 of the mouthpiece 3 are connected inclined at an angle of 30-36 ° holes 16, the cross-sectional area of which is equal to the area of the mixing chamber 13, and the output nozzles 17 are made of a large number of small diameter holes located concentric groups along the mouthpiece, and their total area is larger than the area of the mixing chambers s.

The mouthpiece 3 is equipped with support roller wheels 18, which, at a certain angle α of the inclination of the burner to the work surface equal to 50-60 °, maintains a stable distance from the nozzle part of the mouthpiece to the work surface, thereby ensuring the same thermal regime of the work surface.

The multi-nozzle burner is equipped with a water cooling system for the nozzle part of the mouthpiece and contains a water valve 19 and a spray tube 20. The cooling system is attached to the tip 2 using clamps 22.

Multi-torch burner operates as follows. Oxygen and combustible gas through the corresponding channels of the barrel 1 and the corresponding nozzle tubes 7, 8 go to the head 9. Fine tuning of the power modes is carried out by the size of the flame using the opening of the control valves 4, 5, which are installed in the corresponding channels of the barrel 1. the barrel can be used with typical torch handles. In the head 9 there is an opening 21 for the outflow of combustible gas. Oxygen enters the mixing chamber 23 of the mixer 13 through a calibrated hole 12 at a high speed, while the pressure drops at the inlet of the mixing chamber 23, which creates a vacuum in the opening of the gas channel 21, thereby increasing the intensity of absorption of combustible gas. In the mixing chamber 23, oxygen is mixed with a combustible gas. The combustible mixture enters

gas channels 15 of the mouthpiece 3, where further mixing of the gases takes place, the quality of the combustible mixture and pressure equalization along the length of the gas channel of the mouthpiece are improved. The outflow of the combustible mixture from the mouthpiece 3 occurs through a large number of nozzle openings 17 of small diameter located in concentric groups along the mouthpiece.

Claims (3)

1. A multi-torch burner containing a barrel with oxygen and combustible gas supply channels, control valves installed in them, a nozzle with an injection system, a mixer with a mouthpiece screwed to it, characterized in that the gas channels of the mouthpiece are connected by inclined openings, the total cross-sectional area of which equal to the cross-sectional area of the mixing chamber, and the output nozzles are made with a large number of small diameter holes, while their total area is larger than the area of the mixing chamber. 2. The burner according to claim 1, characterized in that the mouthpiece is equipped with support roller wheels. 3. The burner according to claims 1 and 2, characterized in that the nozzle part of the mouthpiece is equipped with a water cooling system.