SU785379A1 - Device for glass-coating of tubes - Google Patents

Description

The invention relates to the field of coating, namely to devices for insulating the inner surfaces of metal pipes. A pipe coating device is known that includes a piston with a trapezoid-shaped electrode located on it (.11. The main disadvantage of this device is that at the time of coating it is supported on the pipe only by surface tension forces. The device is known coating pipes containing a hollow piston with a sealing element and a head for supplying compressed air 2. A disadvantage of this device is that only pipes that are vertically arranged can be coated, and this causes it is difficult to create deep mines, special lifting equipment and the lack of visual observation of the process.A device is known for applying an enamel coating on the inner surface of pipes, comprising a housing, an assembly for feeding the material, an impeller with annular grooves fixed to the axis of the electric motor 3. This device is the presence of rotating elements, reducing the reliability and limited temperature range of application, due to the difficulty of the thermal insulation tion engine. The aim of the invention is to improve the quality of the glass coating on the pipes. This goal is achieved in that the device comprising a housing with supports and a piston with a channel for supplying the coating material, is equipped with electrodes for heating the material, and in the housing there are channels for supplying compressed air. Such an embodiment of the device makes it possible at the time of operation to hold the glass that is formed, to press it against the pipe and to cool it. FIG. 1 - installation diagram; in fig. 2, section A-A of FIG. I.

The device consists of a piston 1, which is a pipe, made of reinforced refractory material with sealing fireclay elements -2. The heating electrodes 3 are located inside the piston, the outer surface of which serves to heat the glass mass in the piston and the internal gas supply channels. The piston ends with a head 4 with four annular Nffl nozzles 5. The nozzle closest to the sealing elements communicates with and through the piston during operation, molten glass mass is supplied. Each of the three other nozzles is connected to the internal channels 6 of the respective electrodes. The whole piston is housed in the electric heater 7, in which the thief is made NCA 8- to drain excess glass.

The device works as follows.

The pipe 9 is introduced into the colder space between the electric heater 7 and the piston 1 and imparts a rotational motion to it. Further, compressed air is supplied through internal channels 6 of electrodes 3, which is pulled out of the corresponding annular nozzles, is cooled, and current is applied to the electrodes. At the same time turn on the heater. Then the piston serves

from the arms (not indicated), molten glass melt, which, having flowed out of the nozzle when the pipe was axially moved, hits its inner surface, and the air flow levels this layer and supports it.

The device will apply a high-quality coating on the pipe.

Invention Formula

A device for applying a glass coating to the pipes, comprising a housing with supports and a piston with a channel for supplying the coating material, characterized in that in order to improve the quality of the floor, the device is equipped with electrodes for heating the core material, and the channels for the supply of compressed air are made in the housing. of air.

Sources of information taken into account in the examination

1. Author's certificate of the USSR And 548579, cl. From 03 to 27/02, published 1.975.

2. USSR author's certificate K 474512, cl. From 03 to 27/02, published 1973.

3. USSR author's certificate N 361299, class, C 23 .0 5/00, published. 1970.

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Claims (1)

Claim A device for applying a glass coating to pipes, comprising a housing with supports and a piston with a channel for supplying coating material, characterized in that, in order to improve the quality of the coating, the device is equipped with electrodes for heating the coating material, and channels for supplying compressed air.