SU1514640A1 - Device for lining inner surfaces of tubes with thermoplastic film sleeve material - Google Patents

Description

The invention relates to a device for lining the internal surfaces of pipes

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sleeve thermoplastic film material. The aim of the invention is to increase the strength of the connection polyethylene lining and pipes. To do this, the device is equipped with a glow discharge formation mechanism made of two independent electrodes 5 and 14 installed in the pipeline outside and inside the sleeve laid on the surface of the pipeline and connected by cables 4 and 15 to the power source. The device is equipped with a piston 6 with a conical cavity 8, communicated by channels 9 with the outer surface of the piston 6. 1 Il.

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1514640

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Cutting refers to the means for

operation of trunk pipelines,

in particular, to devices for lining inner surfaces of tubular pipes

thermoplastic film material.

The purpose of the invention is to increase the strength of the connection polyethylene lining and pipes.

The drawing shows the proposed device.

The device consists of a sealed chamber 1 with a drum on which a polymer sleeve 3 is wound, with a cable 4 laid in it. Cable 4 is connected to an annular electrode 5 of a glow discharge mechanism installed in a piston

6. The piston 6 has a seal 7 in which a conical cavity 8 is formed, communicated by channels 9 with an annular gap 10. A piston 1 1 is installed in front of the piston 6 and glue 12 is injected between it. On the mountain 3 there are 3 mountains 13 with an annular electrode 14. To which cable 15 wound with hose is connected

3 to drum 2. Cables 4 and 15 through the hollow shaft 16 of drum 2 and rotating contact 17 are connected to a power source in the form of a voltage variator 18 (for example, mark РНО-250) and a transformer 19. A sealed chamber 1 communicates with the working agent supply system 20 .

The device works as follows.

The system 20 in the pipeline serves compressed air. Sleeve 3 starts turning out. move through the pipeline, moving the pistons 6 and 11 with glue 12, which through the channels 9 enters the annular gap 10 and wets the wall of the pipeline.

The sleeve 3 is mixed between the electrodes 5 and 14 and its surface is ionized, like on the electrode 5 and 14 from the voltage variator 18 through the cables 4 and 15 an electric current flows.

The sleeve 3 is glued to the wall of the pipeline after the polymerization of the adhesive 12.

Example 1. Lay in a sleeve ¢ 7 () 0 mm and a length of 500 mm cable. The sleeve 3 is wound on the technological drum. Inside the sleeve 3 is laid a roll of cable 4. The ends of the cable 3 and cable 4 roll on the shaft 16 of the drum 2. The sleeve 3 with cable

4 is wound on a drum 2, reeling

it is from the technological drum, and the drum 2 is placed above the technological drum. During the winding of the sleeve 3, the roll with the cable 4 goes down and unwinds, being distributed along the entire length of the sleeve 3.

Example 2. Protect the pipeline <7 * 700 mm and a length of 500 mm. Make a sleeve ¢ 700 mm and a length of 520 mm from a polyethylene film with a thickness of 1 mm. The pipeline wall is smeared with a layer of glue "Sprut4M". The sleeve is passed between two electrodes, to which current of industrial frequency with voltage of 1100 V and current of 0.29–0.30 A is supplied. Compressed air is pumped into the pipeline, with which the sleeve is pressed and moved. Air is pumped under a pressure of 0.6 MPa with a flow rate of 70 l / s. After coating the pipeline, it is maintained under a pressure of 0.3 MPa for 6 hours.

After that, the sleeve is firmly connected to the wall of the pipeline.

The use of the invention allows the polyethylene to protect the existing pipelines.

Claims (1)

Claim A device for cladding internal surfaces is a rough sleeve thermoplastic film material, containing a chamber with a polymer hose installed therein and a compressed air supply system, characterized in that, in order to increase the strength of the connection of the polyethylene liner and the pipe, it is equipped with a glow discharge mechanism, which made of two autonomous electrodes installed in the pipeline outside and inside the sleeve laid on the surface of the pipeline, while the outer electrode is connected n with a power source with a cable laid inside the sleeve, and the inner electrode is connected to the power source with a cable laid outside the sleeve, with the inner electrode embedded in the torus at its surface in contact with the sleeve, and the outer electrode mounted on the end of the piston interacting with the sleeve outside, moreover, the piston has a cavity in the form of a cone, connected by channels with the outer surface of the piston.