SU40873A1 - Autogenous welding device - Google Patents

Description

Until now, highly compressed oxygen has been used for autogenous welding and cutting, the transportation of which in cylinders designed for high pressure (steel bottles) is carried out at high costs and difficulties. According to the present invention, pressureless, especially liquid, oxygen is used instead, so that, for example, in mining plants, where there are facilities for producing explosive gas, liquid oxygen can also be used for cutting and welding, thanks to which eliminates the need for obtaining compressed oxygen in steel bottles or in an apparatus for producing gaseous oxygen.

As is known, liquid oxygen is stored in vessels for liquid air, in which extremely insignificant evaporation occurs, but which do not withstand high internal pressure, which means that the evaporation of their contents should not occur at any significant pressure, for example, 2 atm. L meanwhile, a known pressure is required in order to give oxygen a high flow rate for combustion with hydrogen or with acetylene; this flow rate

necessary, firstly, to ensure intensive combustion and, secondly, to eliminate the danger of a backfire, flame.

This difficulty is eliminated, in the opinion of the applicant, by the use of a mixing device based on the action of the jet.

In the schematic drawing of FIG. 1 depicts a mixing device; FIG. 2 is an elastic reservoir ;: FIG. 3 and 4-vessel with double walls ;. FIG. 5-two storage facilities for liquid oxygen.

The proposed device consists of a wide pipe I, which leaves, in the form of a closed pipeline, from any storage tank containing no pressure that is to be moved, oxygen; This chamber is equipped with a mixing chamber 5 equipped with a vent. Chamber 2 enters a narrow tube 2, the end of which is enclosed by a pipe / and through which compressed gas (oxygen or combustible gas, such as hydrogen, luminous gas, etc.) flows in. This latter is sucked in by the jet not under pressure oxygen from the pipe / and carries it along with it, so that the mixture of both gases flows from the mixing chamber 5 to the place of consumption, in particular to the autogenous burner, with considerable kinetic energy.

The elastic tank 5, (Fig. 2) contains oxygen that is not to be mixed, to be mixed: this vessel does not have a water seal and is connected by a pipe 4 to a pipe 1 (Fig. 1). The tank 5 has, as it is already known, non-isometric folds (in the air type., Balloon), because, however, uniform folds (in the blacksmith kind), and whenever possible consists of thin, light, gas-tight, flexible or elastic harvest fabric (for example, balloon balloon). With the help of a rigid lid, the weight of the tank is balanced as much as possible, which in FIG. 2 not shown. 7-directional yush.a.dl rigid lid, consisting of: s fixed at the bottom of the rod, the entrance to the closed. tube mounted on the lid and facing out.

Vessel W is equipped with double walls. 3), from the gap between which the air is pumped out. In the vessel / O is: liquid oxygen, which is evaporated by heating. The heat required for this is delivered in a well-known way from the outside through a metal rod P. The evaporated oxygen enters through pipe 9, which, to make the pipeline flexible and pliable, is partially twisted by a coil, into pipe I, and from here, as needed, is directed directly into the chamber mixing (Fig. 1) or through the pipe 4 temporarily in the gas storage 5.

Oxygen is sucked (Fig. 4) in the liquid state into the pipe (2,). Evaporation occurs on a further path from the immersed pipe / 2 to the mixing device (Fig. 1) or to the gas storage facility 5 (Fig. 2) under the influence of outdoor atmospheric heat. In order to avoid the formation of a vacuum in the vessel (5), an opening (4) is made in the lid, through which external air 7 O penetrates into the vessel, as oxygen is sucked out of it.

FIG. 5 shows two storages I and 20 for liquid oxygen, connected in this case with pipes 75 to 22 with a pipe / leading to device 2, 3 (Fig. 1), and feeding the pipe / evaporated oxygen, which, however, may temporarily be under : also led through pipe 4 to the gas storage facility. This is not shown in the drawing, and vice versa, the valve 8 of the pipe 4 is assumed to be closed; Below the crane there is a communication between the gas storage 5 (Fig. 2) and the inner space of the vessels, formed by the part of the pipe 4 coming from the gas storage 5, the pipe (5) and the pipes (6) / 9. This message leads to the fact that sour. From the gas storage, s # is sucked by means of the device 2, 3 (Fig. 1) into vessels 7, 20, where it evaporates liquid oxygen with its own heat, after which this evaporated oxygen is sucked through device 8, 22 by means of device 2, 3 (Fig. 1 ). Vessel 2 (supplied, moreover, with a massive rod 2 /, which by its heating with heat supply gives the main mass of oxygen entering device 2, 3 (Fig. 1), while oxygen sucked from tank 5 (Fig. 2) only an additional amount of gaseous oxygen, i.e., replenishes the evaporation of oxygen.In order to save the oxygen that is used for heating in the tank 5, it can also be artificially heated, but its own heat leads by itself to the rapid evaporation of liquid oxygen in the vessels Together gasholder 5 can be applied, of course, and other vessels containing oxygen at normal or slightly elevated pressure.

It is possible to admit other, even less simple devices, by means of which the suction of the gas flowing through pipe 2 (Fig. 1) would cause an external influx of heat to the liquid oxygen in the vessels to evaporate the latter.

The gas in the pipe 2 (Fig. 1) under pressure can be hydrogen, if it means burning oxygen with it; when using acetylene, which under pressure, as is known, becomes explosive and therefore not applicable under pressure, compressed oxygen is used, and although the expensiveness and inconvenience of using oxygen in steel bottles is not completely eliminated, however, they are reduced to very small sizes. .

Oxygen gas drawn in through pipe (fig. 1) can be of any origin, for example, it was previously obtained in the form of gas and stored in gas storages in gaseous form. And in this case, the expansion of compressed gas occurring in pipe 2 (Fig. 1) serves to increase uncompressed oxygen for cost-sharing, and this makes, among other things, a compressor installation unnecessary.

In addition to autogenous welding and cutting, the device can also be used for other high-temperature processes in which oxygen or oxygen-rich gas is burned.

It should also be controlled that the system that conducts uncompressed oxygen is switched on with a water tank, at least in the case when the compressed gas in pipe 2 is flammable, and its mixture with oxygen is therefore explosive.

The subject of the patent.

A device for autogenous welding, characterized in that the tube / for suction of oxygen or gas-rich gas, which is under atmospheric pressure or close to it in storage 5, is connected by pipelines / 5 (Fig. 5) to storage tanks 17 or W for oxygen oxygen such that the gaseous oxygen is sucked through a layer of liquid oxygen in order to evaporate the latter due to the living heat of gaseous oxygen or due to heat borrowed from the external environment by means of metal rods.

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