SU1442285A1 - Arrangement for scraping the inner surface of pipe-line - Google Patents

Abstract

The invention relates to the cleaning of pipes from the inside, can be used in the oil and gas industry, in communal households and land reclamation, and is aimed at increasing the reliability of the device. The device comprises a sectional cuff 1 and a cuff folding mechanism comprising a piston 4. Between the piston 4 and the stop, made in the form of an additional piston 11, a return spring 10 is installed. The piston is placed in a vessel 12 having an adjustable throttle 14 and a loading valve 13 for filling with air. The adjustable throttle 14 is designed to operate when the pressure on the piston 4 is higher than the permissible pressure. 1 il. &

Description

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The invention relates to the cleaning of pipes from the inside and can be used in the oil and gas industry, in public utilities and land reclamation.

The purpose of the invention is to increase the reliability of the device.

The drawing shows schematically the device, a longitudinal section.

The D.L device for cleaning the internal surface of the pipeline has cleansing elements in the form of a folding sectional cuff 1 and a cuff folding mechanism consisting of a lever system 2 connected to the piston rod 3 of the piston 4 placed in the cylindrical housing 5. In the end walls 6 and 7 of the cylindrical the bodies have holes 8 and 9. The spring 10 of the return of the piston 4 to the rearmost position is under the control between the piston 4 and the stop, made in the form of an additional piston 11 placed in the container 12, the cavity filling the working agent on it ene charging valve 13. In addition, on the container The adjustable throttle 14 is mounted.

Lever system 2, rod 3 piston

n, the piston 4 with the housing 5 and the piston 11 with a capacity of 12 are combined into a single unit by means of an axial rod 15.

Before starting the device, the tank 12 through the charging valve 13 is filled with gas. The gas pressure is chosen so that the force of its influence on the piston 11 is equal to the effect on the same piston from the side of the spring 10 at the maximum allowable pressure in the pipeline.

The device is introduced into the pipeline and is moved along the pipeline from the inside by the flow of the agent transported through the pipeline. In this case, the petals of the sectional cuff 1 are pressed against the walls of the pipeline due to the elasticity of the spring 10. The force from the spring 10 is transmitted to the petals of the cuff through the piston 4, its rod 3 and the system of levers 2.

If the device encounters an obstacle in the form of a narrowing or a heavily polluted area in its path, its speed of movement decreases, and the pressure in the pipeline cavity behind the device increases. Under the dei

By increasing the pressure, the piston moves in the cylindrical housing 5, compressing the spring 10. At the same time, the rod 3, connected with the lever system 2, also moves with the piston 4, and the cuff 1 decreases in diameter, which ensures its passage through the defective section. Then the speed of the device increases again, the pressure in the cavity behind the device drops and the piston 4 returns to its place.

If the device encounters a significant contraction that cannot be overcome due to the degree of compressibility of the cuff at acceptable pressure values, the latter rises above the allowable one. This automatically activates the adjustable throttle 14 and the piston 11, displacing the gas from the tank 12, moves forward, ensuring the relaxation of the spring 10 and the possibility of further reducing the diameter of the cuff 2. The speed of movement of the piston 11 in the tank 12 can be adjusted by changing the flow cross-section 14. When the device leaves the narrowing area, its operation continues, but already with a reduced effort to press the cuff against the walls of the pipeline due to the pressure drop in the cylinder 12.

If the restriction is such that the device cannot overcome it, then after a time long enough for all the gas to escape from the cylinders 12, the return spring 10 will be released, and the device in the folded down state will be expelled from the pipeline.

The use of the invention makes it possible to increase the reliability of the device, since it can maintain operability under repeated exposure to maximum loads due to the fact that operability during the presence of maximum loads is not lost instantaneously, but decreases gradually over time.

Claims (1)

Invention Formula A device for cleaning the internal surface of the pipeline, comprising cleaning elements in the form of a folding sectional cuff and a folding mechanism for the cuff consisting of 31442285 a lever system connected with the rod, so that, in order to securely place in the case, the face work, it is equipped with a vessel whose walls have openings, and with a compressed gas, a refilling valve and an adjustable throttle, and the emphasis on the possibility of interaction with the piston is made in the form of an additional piston placed in it and an emphasis, characterized by the bone.