RU2451870C2 - Method of pipeline coating and device for implementation thereof - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: device comprises chambers with sleeves ends of which are unbent and fixed on the perimetre of the pipeline. Cavities formed by the unbent sites of the sleeves are connected with fluid agent supply systems. The drums are mounted out of a longitudinal axis of the pipeline. One end of the sleeve is fixed on the perimetre of the pipeline, while the second end of the sleeve is connected through hoisting slings with a flexible coupler an end of which is connected with a traction organ. The device is supplied with a pipe stopper represented in the form of a torus mounted on the pipe connected to a hollow cylinder. The device may comprise an additional chamber with a sleeve an end of which is fixed on the perimetre of the pipeline, while the second end of the sleeve is connected through hoisting slings with a flexible coupler connected to the traction body.

EFFECT: extended range of the instruments.

2 cl, 8 dwg

Description

The invention relates to the construction and is used in the construction and repair of pipelines.

The closest prototype is the device according to patent RU 2184902, 7 F16L 58/04 from 08/31/2000

A known method of coating the inner surface of the pipeline, when the coating composition is moved through the pipeline and the surface of the pipeline is coated with it, for example, a.s. USSR No. 1041179, B22F 7/04, 1981 or WO 86/02425 A1, 04.24, 1986

The disadvantage of this method is that they work well with adhesives with good fluidity. When using this method on cement-sand mixtures, their separation occurs.

Known devices for coating the inner surface of the pipeline, consisting of a fluid agent supply system, a coating mechanism, for example, EPO patent No. 0082212, class. F16L 55/16, 1981, A.S. No. 730379, cl. B05C 7/08, 1980, patent RU No. 20157465, B05C 7/08, 1992, C 1/08, 1992, and.with. USSR No. 1512682, cl. B05C 1/08, 1989, A.S. USSR No. 1445810, class B05C 1/8, 1988

The disadvantage of these devices is that they are not very effective when applying a cement-sand mixture.

The closest prototype is a method for cleaning pipelines, a method for coating pipelines and devices (options) for its implementation, RU 2358186 C2, class. 7 F16L 58/04.

The disadvantages of this method and device are the need to stop the pipeline during repair work, as well as installing pumping equipment and laying temporary pipelines for pumping waste water.

The prior art method of coating a pipeline, including coating by entering from opposite ends of two hoses, the ends of which are bent and fixed in the pipeline RU 2020367 C1 (Shishkin Viktor Vasilyevich), 09/30/1994.

Also known is a method of restoring a pipeline in which the ends of the sleeves are fixed around the perimeter of the pipeline RU 2178858 C2 (CJSC Licenstexport), 01/27/2002.

The proposed device differs from the known one in that the end of the sleeve is fixed along the perimeter of the pipeline, and the second end of the sleeve with slings is connected to a flexible connection, the end of which is connected to the traction body.

Moreover, a prior art apparatus for restoring a pipeline is known in which the end of the sleeve is fixed around the perimeter of the pipeline.

The device and method according to patent RU 2020367 C1 (Shishkin Victor Vasilievich), 09/30/1994, p.3, p. 12-22, figure 1 has the following disadvantages: disabling the pipeline for the time of hardening of the coating solution (Fig. 6, p. 4), e.g. fiber-reinforced concrete (p. 5).

Also from patent RU 2178858 C2 (CJSC Licenstexport), January 27, 2002, an abstract is known of a device for coating a pipeline in which the end of the sleeve is connected to the cable with slings (flexible connection - according to the terminology of the applicant). It is widely known that, after coating, the pumped product is supplied through the pipeline.

This patent has the following drawback, namely that at the time of hardening of the coating composition (fiber-reinforced concrete) it is impossible to pump a product through the sleeve, for example, waste water (page 5).

Moreover, a method for coating a pipeline is known from the prior art, in which, after applying a repair coating in the form of sleeves, the pipeline to be repaired is connected to an existing heating main and the heat carrier is transported (a pumped product is supplied according to the applicant’s terminology) (patent RU 2081368 C1, published on June 10, 1997, total 5 s., see page 4, example 1).

The disadvantage of this method is that it is suitable only for pressure pipelines and is unsuitable for use in pipelines of pressureless sewage, since when repairing pressureless sewage it is necessary to constantly pump waste water. For this, it is necessary to install additional pumping equipment, as well as lay temporary pipelines to remove effluents.

These works are carried out each time anew, before the restoration of a new section of the pipeline. Laying timelines through streets and intersections is a very problematic and costly task. This is described, for example, in the book by D. F. Goncharenko “Operation, Repair and Restoration of Sewerage Networks”, chap. 7, clause 7.4. (Kharkov, Consum Publishing House, 2008), which describes the technology for the restoration of pipelines of drainage networks, in which sections of the sewer collector are disconnected with the help of air locks for the duration of repair work, and sewage is pumped through the surface by buried pumps. Work in the pit is performed using one water-lowering installation and a drainage pump.

The problem is achieved by the combination of applied inventions.

A method for coating a pipeline, including coating the inner surface of the pipeline by introducing into the pipeline from its opposite ends an elastic formwork in the form of two sleeves, the ends of which are bent and fixed along the perimeter of the pipeline, while the formwork is inflated by supplying a fluid agent to form a cavity between the sleeves, the latter is filled a solution in the form of fiber concrete, and a continuous coating is applied by rolling through the pipeline hoses between which the coating solution is moved through the pipeline (f brobeton), wherein after coating additionally introduced into the mold coaxially mounted two sleeves, then the inner sleeve further introduced by rolling is withdrawn from the outer sleeve coaxially mounted therein and create a vacuum (pressure reduction), and this product is pumped hose (drain).

This allows you to reduce the time that the pipeline stops during work and pump the product (stock) into pressureless sewers without pumping equipment.

This method is carried out by a device for coating a pipeline, including chambers with sleeves, the ends of which are bent and fixed along the perimeters of the pipeline, while the cavities formed by the bent sections of the sleeves are in communication with the fluid agent supply systems, the drums are installed outside the longitudinal axis of the pipeline, and the end of the sleeve is fixed along the perimeter of the pipeline, and the second end of the sleeve with slings connected to a flexible connection, the end of which is connected to the traction body, while the device is equipped with a pipe plug made minutes in a torus mounted on a pipe connected to the hollow cylinder. An additional chamber with a sleeve can be installed in the device, the end of which is fixed along the perimeter of the pipeline, and the second end of the sleeve is connected via slings to a flexible connection connected to the traction unit.

This difference makes it possible to ensure the passage of the pumped product (waste water) during the hardening of the coating solution (fiber concrete) through the pipeline.

The drawings show:

Figure 1 - camera;

Figure 2 - installation diagram of the sleeve in the pipeline;

Figure 3 - diagram of the deployed sleeve in the pipeline;

Figure 4 - installation diagram of two sleeves;

5 is a diagram with a siphon;

Figure 6 is a coverage diagram;

7 is a covered pipeline;

On Fig is a diagram of a method for coating a pipeline.

The device shown in Fig. 1 is made of a chamber 1 in communication with a fluid agent supply system 2 (compressor). In the chamber 1, a drive reversing drum 3 is mounted on which a flexible connection 4 (cable, tape) is fixed, which is connected by slings 5 to the end of the sleeve 6. The camera 1 has a pipe 7 with a roller 8 through which the flexible connection 4, slings 5 and the sleeve pass 6. The end 9 of the sleeve 6 is bent and fixed along the perimeter of the spring ring element 10. A torus 11 is installed on the pipe 7.

The device depicted in figure 2, is made as follows. In the well 12 install the pipe 7 of the chamber 1. Element 10 is installed in the pipe 13.

The device depicted in figure 3, is made as follows. The sleeve 6 is deployed in the pipe 13 and its end is fixed on the cylinder 14 with the pipe 15 on which the torus 11 is installed. The sleeve 6 is fixed with a clamp 16.

The device depicted in figure 4, is made as follows. Chambers 1 are installed on wells 12. Sleeves 6 enter coaxially into each other. In the initial position, the leftmost sleeve 6 overlaps the pipe 13, as shown in figure 2.

The device depicted in figure 5, is made as follows. At the very beginning of the repaired section of the pipeline 13, a siphon is installed, which is made of a sealed container 17 with pipes 18, 19 with check valves 20, 21. Tori 11 are installed on the pipes 20, 21.

The device shown in Fig.6, is made of two chambers installed at opposite ends of the pipeline 13. Between the sleeves 6, the pipeline is in communication with the system 22 for supplying a coating solution (fiber concrete).

7 shows a section through a coated pipe 13, which is coated using a sleeve 6.

On Fig shows a diagram of a method for coating a drainage pipe, which consists of chambers 1 installed above the wells 12, a system 22 for supplying a coating solution (fiber concrete) in a pipe 13, a torus plug 23, a siphon 24. A siphon 24 is installed in the next well, which is installed on the far right chamber 1. The torus plug 23 is installed in the well 12 in the pipe 15 located between the chambers 1.

The device shown in figures 1, 2, 3, operates as follows.

The pipe 13 is plugged, for example, either with a torus, or with a sleeve, or in another known manner.

System 2 into the chamber 1 serves compressed air, which begins to roll the sleeve to the full length, its end with a clamp 16 is mounted on a hollow cylinder 14.

At the end of the movement of the sleeve 6, its end opens, and it communicates with the pipe 13.

To return the sleeve 6 to its original position, the end is disconnected from the cylinder 14.

By rotating the drum 3 (traction body) sleeve 6 with a flexible connection 4 (tape, cable) is moved to its original position, a vacuum is formed.

The pumped product, such as wastewater, is sucked into the pipeline 13 and through it enters the catchment.

Example

The pipeline of pressureless sewage ⌀800 mm was restored.

The distance between the wells was 150 m. The pipeline is made of reinforced concrete pipes.

On the wall of the pipeline there were chips, the destruction of concrete. The restoration of the pipeline was carried out with fiber concrete. Polypropylene fiber was used as fiber. The amount of fiber was 0.5% by weight of concrete.

The method was carried out by the devices depicted in figures 1, 2, 3, 4, 5, 8.

The pipeline was cleaned of deposits. Siphon 24 closed. The right sleeve 6 was moved to the left sleeve 6 and between them fiber reinforced concrete was pumped in an amount of 7.5 m ³ .

After this, the sleeves 6 began to move to the right.

The right sleeve 6 along with the spring element was withdrawn from the pipeline 13. The left sleeve 6 was introduced to the next well and its end was fixed on the cylinder 14 (not shown in the drawing), as shown in Fig.3.

After that, the leftmost sleeve 6 began to be moved along the sleeve 6 laid in the pipe 13. After it moved to the extreme right position and its end opened, the siphon was opened 24. Then this sleeve 6 began to be removed from the pipe 13. The drains began to move after the sleeve 6.

The left sleeve 6 with a spring element brought out of the pipeline. Sewage through pipeline 13 entered the catchment.

36 days after the hardening of the concrete and the set of strength from the pipeline 13, the sleeve 6 laid in it was withdrawn.

All chips and destruction of the pipeline 13 were filled with fiber-reinforced concrete, which covered the entire surface of the pipeline 13. The pipeline 13 was restored and all chambers 1 of the plug 23, siphon 24 and system 22 were removed from the pipeline. I

Then, the diagnostic equipment was moved along the repaired section of the pipeline 13.

The quality of the coating was excellent.

Using the invention allows repairing pipelines with a minimum turn-off time.

Claims (2)

1. A device for coating a pipeline, including chambers with sleeves, the ends of which are bent and fixed along the perimeters of the pipeline, while the cavities formed by the bent sections of the sleeves are in communication with fluid agent supply systems, characterized in that the drums are installed outside the longitudinal axis of the pipeline, and the end sleeves are fixed around the perimeter of the pipeline, and the second end of the sleeve is connected with slings to a flexible connection, the end of which is connected to the traction body, while the device is equipped with a pipe plug made in de torus mounted on a pipe connected to the hollow cylinder. 2. The device according to claim 1, characterized in that it has an additional chamber with a sleeve, the end of which is fixed along the perimeter of the pipeline, and the second end of the sleeve through slings is connected to a flexible connection connected to the traction body.

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