RU2520135C1 - Coating method of inner surface of pipeline, and device for its implementation - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: mechanism is moved along the pipeline, by means of which a solution in the form of longitudinal strips is applied onto inner surface of the pipeline. A cover is rolled on the strips and left in the pipeline till solidification of the solution. After that, the cover is rolled out of the pipeline. The solution application mechanism and the cover is moved along the pipeline at different speeds. A device for coating of the inner surface of the pipeline includes solution and fluid agent supply systems, a solution application mechanism, chambers with a drive reversible pulley, on which the cover is wound. The cover end is unbent and fixed along the chamber perimeter. The solution application mechanism is made of two cuffs. Each cuff is made of hubs with elastic and flexible petals, which are installed on the shaft. The cover end is fixed on a cable that passes through cuffs and its end is fixed on reversible drive pulleys. Devices controlling the cable drawing force through holes made in cuff shafts are installed on the cable.

EFFECT: wider range of hardware.

3 cl, 2 dwg

Description

FIELD OF THE INVENTION

The invention relates to the construction, in particular, to a method for coating the inner surface of a pipeline and a device for its implementation, and can be used in the construction and repair of pipelines.

State of the art

A device for cleaning pipes containing cuffs and a working body with cutting edges located around the circumference of the spring levers, while it is additionally equipped with rollers mounted on the spring levers between the cutting edges with the possibility of adjusting the distance from the longitudinal axis of the device to the axis of the rollers, while the axis of the rollers are perpendicular to the longitudinal axis of the device (see AS SU No. 1041179, class B08B 9/04, publ. 09/15/1983).

The disadvantage of this device is its low reliability, limited functionality and ease of use.

A device for coating on the inner surface of the pipeline, containing a working body for coating, a bath for the coating material, the working body is made in the form of a torus, through the central hole of which a rod is connected, connected with reversible drives, while the bath is equipped with longitudinal ribs ( see Pat. RU No. 20155742, IPC B05C 1/08, publ. 04/15/1994).

The disadvantage of this device is that it is not effective when applying a cement-sand mixture due to its separation.

The closest in technical essence and the achieved positive effect and accepted by the authors for the prototype is a method of cleaning the pipeline, a method of coating the inner surface of the pipeline and devices (options) for their implementation, including cleaning the pipeline from deposits, moving the solution through the pipeline, applying it to the inner surface of the pipeline , smoothing the applied solution, while moving the solution through the pipeline and removing deposits from its wall at the same time, moreover, ruits descaling was stirred with a solution, and the resulting composition is applied to the cleaned surface of the pipeline with the application of pressure to the initial composition.

The method is carried out by a device that contains a mechanism for applying a solution to the inner surface of the pipeline, a solution supply system, a fluid agent supply system, and it is equipped with a mechanism for cleaning the pipeline from deposits, a backpressure mechanism that are installed first along the coating, while the solution applying mechanism is connected with a smoothing mechanism that has openings for the passage of gas.

An embodiment is a device containing a mechanism for moving the solution through the pipeline and applying it to the inner surface of the pipeline, a fluid agent supply system, a solution supply system, while it is equipped with a mechanism for moving the sleeve through the pipeline, a mechanism for pressing the sleeve into the solution layer deposited on the surface of the pipeline, this mechanism for moving the sleeve through the pipeline contains means for storing the sleeve, while the sleeve is connected by a flexible connection with the mechanism for moving the sleeve.

The mechanism for applying the solution to the inner surface of the pipeline contains a shaft, hubs and cuffs, which are made in the form of elastic cones mounted on the hubs or staggered elastic and elastic petals (see US Pat. No. 2184902, IPC F16L 58/04 publ. 10.07. 2002).

The disadvantages of this device and method is that it is impossible to provide a smooth coating and apply a coating with a thickness of more than 3 mm, the complex design of the device, the low coating rate, also the coating does not have sufficient strength, it is impossible to apply fiber-reinforced concrete to the surface of the pipeline, it is very difficult to ensure the specified thickness accuracy coatings, high complexity coating technology.

Disclosure of invention

The objective of the invention is to develop a method for coating the inner surface of a pipeline and a device for its implementation, having a simplification of the coating technology and a simplification of the design, expanding the functionality of the method and device, improving the quality and strength of the coating, reducing material costs.

The technical result that can be achieved using the present invention is to simplify the technology of coating the inner surface of the pipeline, simplify the design, expand the functionality of the method and device, improve the quality and strength of the coating, reduce material costs.

The technical result is achieved using the method of coating the inner surface of the pipeline, including moving through the pipeline the mechanism by which the solution is applied to the inner surface of the pipeline, the solution being initially applied to the inner surface of the pipeline in the form of longitudinal strips onto which the sheath is rolled, which is left in the pipeline until it hardens solution, after that the shell is rolled out of the pipeline, while the mechanism for applying the solution and the shell are moved through the pipeline with p Azny speeds.

The technical result is achieved using a device for coating the inner surface of a pipeline containing a solution supply system and a flowing agent, a solution application mechanism, a chamber with a drive reversing drum, on which a sheath is wound, the end of which is bent and fixed around the perimeter of the chamber, while the solution application mechanism is made of two cuffs, each of which is made of hubs mounted on the shaft, while elastic and elastic petals are installed on the hubs, forming slots on the periphery, and the end of the sheath is fixed to a cable that passes through the cuffs and its end is fixed to reversible drive drums, while the cable is equipped with means that regulate the pulling force of the cable through holes made in the shaft of the cuffs.

In the device, the shell is made of a smaller diameter than the diameter of the pipeline.

Thus, the technical result is achieved using the method of coating the inner surface of the pipeline, including moving through the pipeline the mechanism by which the solution is applied to the inner surface of the pipeline, the solution is initially applied to the inner surface of the pipeline in the form of longitudinal strips onto which the sheath is rolled, which is left in the pipeline until the solution solidifies, after that the shell is rolled out of the pipeline, while the mechanism and the shell are moved from the pipeline through the pipeline and velocities. The method is carried out by a device containing a system for supplying a solution and a fluid agent (compressed air), a mechanism for applying a solution, a chamber with a drive reversing drum, on which a sheath is wound, the end of which is bent and fixed around the perimeter of the chamber, while the mechanism for applying the solution is made of two cuffs, each of which is made of hubs mounted on the shaft, while on the hubs are installed elastic and elastic petals forming on the periphery of the gap, the second end of the sheath being fixed to the cable, which passage through the sleeve and its end is connected to a second reversible drive drum, while mounted on a cable means to regulate the force pulling the cable through holes formed in the shafts of the cuff, wherein the sheath is made of smaller diameter than the diameter of the pipeline.

A brief description of the drawings and other materials.

Figure 1 shows a method of coating the inner surface of the pipeline and a device for its implementation, General view;

In Fig.2, too, a diagram of the formation of gaps.

The implementation of the invention.

The device for coating the inner surface of the pipeline, shown in figures 1, 2, is made of cuffs, which are made of a shaft 1 and hubs 2, 3 mounted on it, on which elastic petals 4, 5 and elastic petals 6. are staggered. two cuffs are installed in the pipeline 7. The elastic petals 4, 5 are in contact with the wall of the pipeline 7 with ribs 9 and form segmented slots 10, with the wall of the pipeline 7. A flexible connection 11 connects the drums 12, 13.

The end 14 of the shell 15 is fixed to a flexible connection 11. The end 16 of the shell 15 is fixed around the perimeter of the chamber 17. On the flexible connection 11 means 19 are installed that regulate the pulling force of the flexible connection 11 through holes made in the shafts 1 of the cuffs 8.

The system 20 delivers a solution (not indicated) into the cavity 21 of the conduit 7. The system 22 supplies a fluid agent (not shown) to the chamber 17.

A device for internal coating of the pipeline is as follows.

A predetermined volume of solution is pumped into the cavity 21 by the system 20.

The drum 12 begin to wind the flexible connection 11, which is wound from the drum 13.

As a result of the shell 15 and the cuffs 8 moving at different speeds, the cuffs 8 are removed from the shell 15. In the pipe 7 in the cavity formed by the shell 15 and the second cuff 8, the vacuum increases, which increases the output of gas, steam, moisture from the applied solution on the wall of the pipeline 7. This contributes to the formation of a more durable and dense coating. With increasing vacuum, the force required to move the solution and cuffs 8 along the pipeline 7 increases.

When a predetermined force is reached, means 19, for example, a shear pin, are triggered.

By system 22, a fluid agent is supplied to chamber 17. The shell 15 is rolled along the pipeline 7. The first tool 19 is located in the hole of the shaft 1 of the second cuff 8.

The cuffs 8 and the solution move through the pipe 7.

The solution of the second cuff 8 is extruded through the slots 10 in the form of strips on the wall of the pipeline 7.

The cuff 8 and the solution move along the pipe 7 with the speed of movement of the shell 15.

As a result of this, a vacuum occurs between the second cuff 8 and the sheath 15.

The pulling force of the flexible connection 11 through the hole of the shaft 1 of the cuff 8 increases.

When this force reaches a predetermined value, the means 19. The field of this flexible connection 11 freely passes through the holes of the shaft 1 of the cuff 8.

Shell 15 again approaches the second cuff 8.

Gas, steam of the second cuff 8 is displaced through the slots 10 from the pipeline 7 into the external environment.

After the next tool 19 approaches the hole of the shaft 1 of the second cuff 8, the pulling force of the flexible connection 11 through the hole of the shaft 1 of the cuff 8 again increases. After this cuff 8, the solution and shell 15 again begin to move along the pipeline 7, forming a coating on the inner surface of the pipeline 7.

After the cuffs 8 and the remainder of the solution come out of the pipeline 7, the shell 15 is left under pressure of a fluid agent until the solution solidifies, then the shell 15 is removed from the pipeline 7.

Example. The method of coating the inner surface of the pipeline.

After cleaning, the pipeline 7 is covered with a cement-sand mixture. The inner diameter of the pipeline 7 is 200 mm, the length is 200 m. The pipeline 7 is made of a steel pipe with a diameter of 219 mm.

Prepare a cement-sand mixture of the following composition, weight parts: cement (Portland cement grade 500) - 1 hour; quartz sand - 2 hours; PVA glue - 0.03 hours; water-cement ratio - 4.

The method is carried out by the device shown in figure 1.

As the sheath 4, a polypropylene sleeve with a diameter of 190 mm and a length of 205 m is used.

The required portion of the solution is pumped into the cavity 21 between the cuffs 8 in the pipeline 7. The drum 12 (winch) pairs of cuffs 8 are moved through the pipe 7. Following the cuffs 8 through the pipe 7 roll the shell 15 and move it through the solution deposited on the walls of the pipe 7.

After that, the shell 15 under pressure of a fluid agent (compressed air) equal to 0.2 MPa, is kept in the pipeline 7 until the solution solidifies, then the shell 15 is rolled out of the pipeline 7.

A smooth coating 5 mm thick is formed on the wall of the pipeline 7.

Using the invention greatly simplifies the technology and reduces the cost of coverage by 50%.

The invention in comparison with the prototype and other known technical solutions has the following advantages:

- simplification of the technology for coating the inner surface of the pipeline;

- increase in coating strength and quality of repair;

- simplification of the design;

- reduction of the deadline.

Claims (3)

1. The method of coating the inner surface of the pipeline, including the movement through the pipeline of the mechanism by which the solution is applied to the inner surface of the pipeline, characterized in that the solution is initially applied to the inner surface of the pipeline in the form of longitudinal strips onto which the sheath is rolled, which is left in the pipeline until the solution solidifies , after that, the shell is rolled out of the pipeline, while the mechanism for applying the solution and the shell are moved at different speeds through the pipeline. 2. A device for coating the inner surface of the pipeline, containing a solution supply system and a fluid agent, a solution application mechanism, a chamber with a drive reversing drum, on which a sheath is wound, the end of which is bent and fixed around the perimeter of the chamber, characterized in that the solution application mechanism is made of two cuffs, each of which is made of hubs mounted on the shaft, while elastic and elastic petals are installed on the hubs, forming on the periphery of the gap, and the end of the shell is fixed to se, which extends through the sleeve and its end is fixed to reversible driving drums, the wire rope installed on the means to regulate the force pulling the cable through holes formed in the shafts cuffs. 3. The device according to claim 2, characterized in that the shell is made of a smaller diameter than the diameter of the pipeline.

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