RU1829970C - Device for cleaning inner surfaces of pipelines - Google Patents

Description

the device 15 and the body of the tail section 8 form a damper chamber 16, which communicates with the environment through channels 7.

The device operates as follows. Compressed air from a source (not shown) along a high pressure sleeve (not shown) through an adapter 14 and 80 of an air supply pipe 1.3. comes in; the chamber 12 of the differential piston 9 and creates pressure on the surface of the piston from the side of the chamber 12, pressing the piston to the seat 6. Through the nozzle 10 and the channels AND, air from the chamber 12 enters the chamber 5 {receiver). As soon as the pressure in the chamber 5 approaches the value of the pressure in the chamber 12, the differential piston 9 will begin to move away from the seat 6, moving towards the air source. This will happen because the surface on the receiver side 5 is larger than the surface on the side of the chamber 12. As soon as the piston moves away from the seat, the air pressure will propagate i to the surface previously covered by the barrel 2. At the same time, the greatly increased pressure drop will reject the piston with high speed towards the air source, opening the air outlet to the barrel, filled with liquid from the cleaning object.

The sudden application of high pressure (15 MLa) to the volume of fluid in the barrel will cause the formation of a shock wave and, consequently, a multiple increase in pressure in this volume. In this case, a portion of the liquid, tearing out of the barrel having a screw thread inside, is not disclosed, i.e. the law of conservation of angular momentum acts on the rotating jet. As a result, the volume of fluid in the barrel is a pseudo-solid body capable of destroying any deposits in the pipeline. As soon as the volume of fluid from the barrel and the air from the receiver enter the environment, the pressure in the receiver will drop and under the influence of

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In the chamber 12, the differential piston 9 again presses against the seat 6 of the cylinder 3, blocking the barrel 2. The cycle of operation of the device starts again.

Studies to determine the productivity and quality of treatment were carried out under production conditions. The non-exploitable section of the 0400 mm pipeline was used as the test pipeline. The deposits inside the pipeline are solid, overgrowing 85%. Compressed air is supplied from the compressor station to a device placed in a pipe cavity. In this case, an exhaust of compressed air occurs, causing the destruction of the frontal deposits and their removal from the pipeline. In addition, the device was tested to destroy sintered scale in the drainage tray of rolling mill 350 of the Dnepropetrovsk Metallurgical Plant. The results are positive. ny. ., ... -. ..: -

SUMMARY OF THE INVENTION A device for cleaning an inner surface of a pipe / comprising a hollow cylindrical body, in the tail cylinder of which there is a differential piston with a charge chamber in it, connected by means of an air-supply tube with a compressed air supply system and a nozzle in its front part , damper chamber and damper means, because of the fact that it contains a barrel mounted in the front of the body along its axis along a screw axis in its cavity with the formation between the barrel and the receiver’s camera, while the barrel is equipped with installed on its output. at the end with a nozzle for withdrawing fluid from the cleaning zone, the piston charging chamber communicating by means of a seat installed between the piston and the barrel and the channels made in the tail cylinder, alternately with the receiver and the barrel cavity.

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