SU863218A1 - Gas cutter - Google Patents

Description

The invention relates to devices for cutting gas cutting metal. A gas cutter is known that contains a nozzle on the nozzle of the cutter in the form of a hollow cylinder, the lower end of which is cut at an angle of 45 ° and is provided with a number of holes that are evenly spaced along the end. A tube is connected to the nozzle - a mixer, in which, in Failure, separately through control valves, water and compressed air tl3 are supplied. The disadvantage of this device is the need to dismantle the device when changing the cuffs, as well as the large water consumption, up to 57 l / min. Also known is a gas cutter containing a head, with internal and external mouthpieces attached to it and a collector with nozzles for feeding the gas / gas mixture connected by a pipeline to a source of a mixture of water and air. The collector has a quadrilateral cut, the bottom wall of which is formed by a conical ring with the smaller base facing down. A series of holes are made in this wall, around which branch pipes, which end in spray nozzles, are immediately attached to it. The axis of the nozzles form an angle of 65-75 (preferably 7i) with the axis of the collector. The upper wall of the collector is formed by a flat ring, the inner and outer walls are short cylinders concentric with the axis of the collector I2j. A disadvantage of this device is the difficulty of manufacturing the collector, the large amount of time it takes to readjust the mouthpieces. The purpose of the invention is to reduce the time to changeovers mouthpieces. The goal is achieved by the fact that in a cutter containing a head with internal and external mouthpieces and a collector with nozzles fixed on it, to supply a gaseous mixture connected by a pipeline to a source of water and air, the external mouthpiece is made in the form of a truncated cone with a hex head, - in the form of a disc spring installed between the head of the cutter and the head of the external mouthpiece and having a back and front plate, and the intersection point of the axes of adjacent nozzles located in the front plate is located in nnocK Ocjw, lying between the working end face of the outer

mouthpiece and front spring plate.

Figure 1 shows the proposed gas cutter, a longitudinal section; Fig. 2 shows an embodiment of the device.

The device contains a cutter head 1 with threaded 2 and 3 and an annular 4 bore, the inner 5 and outer mouthpieces with 7 and 8 central channels respectively wired into the first, and a rubber ring 9 is placed into the annular bore. The outer mouthpiece is made in the form of a screw with a head 10 at the front end and the threaded rear end, which passes to the cone 11 in the middle part. Along the perimeter of the rear end of the external mouthpiece head, there is a groove 12, in which a ring 13 of the L-shaped profile is placed, and in its turn is placed a rubber ring 14, tightly adjacent to the walls of the external groove of the external mouthpiece and the ring of the L-shaped profile. Between the head of the cutter and the head of the outer mouthpiece there is a spring box consisting of front 15 and rear 16 plates with bent outward and outward edges, which form flanges 17 and 18 in outer diameter, and short cylinders 19 and 20 in inner diameter. The fIH grooves 19 and 20 of the front and rear plates abut respectively on the rubber rings of the heads of the outer MOON and of the cutter. A rubber ring 21 is placed between the flanges of the plates.

A hole 22 is made in the back plate, into which a pipe 23 is connected and welded, connected by means of a cap nut 24 to a pipe 25, through which a mixture of water and air is fed. When assembled, the front and rear plates together with the cutter head and the outer mouthpiece form a collector.

The front plate is provided with a series of nozzles 26 and 27, which are evenly and radially arranged in two concentric circles. The intersection point of the axes of the adjacent nozzles 26 and 27 is located in the plane between the inner and outer working surfaces of the screw head of the wristband.

The device works in the following way.

A pipeline 25 is fed through the pipeline 25 into the cavity of the collar KTdpa under pressure, from where it is pulled out through the nozzles 26 and 27. The jets of the mixture leaving the adjacent radially arranged nozzles intersect each other and the particles of water in the mixture collide with each other, are further crushed, change direction and form a dense water-air curtain around the cut zone.

Fig. 2 shows an embodiment of a device for creating a small air-water curtain when performing marking operations with the help of a combined gas-flame device. In this device in the front plate there are no nozzles 26 and 27, and in the head 10 of the outer mouthpiece 6 are evenly spaced around the circumference, the concentric axis of the cutter, the nozzle 30.

The positive effect of using the invention is achieved by reducing the cost of manufacturing the device, the plates of which can be made by stamping, reducing the time spent on retooling the rounds, reducing water consumption.

Claims (2)

Invention Formula A cutting torch containing a head with internal and external mouthpieces attached thereto and a collector with co-flange for supplying a gas / water mixture connected by a pipe with a source of water and air mixture, characterized in that, in order to shorten the time for reworking mouthpieces, the external mouthpiece is made a truncated cone with a hexagonal head and a disc spring-shaped collector installed between the cutter-head and the head of the external mouthpiece / having a back and front plate, and the intersection point of adjacent axes The nozzles located in the front plate are located in the plane lying between the working end of the head of the external mouthpiece and the front plate of the spring. Sources of information taken into account in the examination .1. U.S. Patent 3,934,818, CL 239-8, 01/27/76. 2. Patent of Sweden, No. 402815, cl. F 23 O 13/32, 07/17/78.