RU2458281C2 - Method to restore pipeline, device for plugging and coating of pipeline, method and device for its cleaning - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: method of coating includes application of a coating composition (hereinafter - composition) onto an inner surface of a pipeline. The composition is moved in a cavity formed by two sleeves. Sleeves are blown to pipeline walls, the composition is injected into the pipeline cavity between the sleeves. The sleeve to the next section of the pipeline is moved by reversing from the previous section. The method is carried out with a device comprising two sleeves laid into a pipeline, a tore, a nozzle. Sleeves form cavities communicated with systems of fluid agent supply by bent ends. The cavity formed by sleeves is communicated with a system of composition supply. The end of the sleeve is bent and connected with a flexible link laid into the sleeve. The second end of the flexible link is connected with a traction mechanism. The end of the sleeve is fixed along a nozzle perimetre. The nozzle cavity is communicated with the composition supply system, which is moved between the tore and the sleeve. The tore with the flexible link is connected with the traction mechanism. The method of cleaning consists in displacement of a sleeve, gas supply into a cavity, formed by a bent section of a sleeve. Gas from the cavity is released into the pipeline, where water is additionally supplied. Releasing the rope, the sleeve with the water flow is moved to the new section of cleaning.

EFFECT: simplified technology of pipeline restoration.

6 cl, 14 dwg

Description

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

A known method of cleaning pipelines from deposits, which consists in the fact that a pipe-cleaning device is moved through a pipe by a fluid pressure, while the liquid is passed through a cleaning device in the form of jets that remove deposits from the pipe’s inner surface, for example, international application WO 86/02293, B08B 9 / 04, C23F 11/00 of 04.24.1986

The disadvantage of this method is that it inefficiently cleans pipelines with deposits whose hardness exceeds 2 units on the Mohs scale.

The closest prototype is a cleaning method in which a pipe-cleaning mechanism with cuffs is moved by a fluid stream through the piping, on the periphery of which liquid jets are formed to remove deposits from the pipe wall, RF patent, RU 2184902, F16L 58/04 of 08/31/2000.

Known devices for implementing this method, for example, and.with. USSR V08V 9/047, 995910, 1983, A.S. USSR В08В 9/04, No. 1744844, 1988, a.s. USSR В08В 9/04, No. 1688503, 1989

The disadvantage of these devices is that they do not very effectively clean the pipeline from deposits whose hardness exceeds 2 units on the Mohs scale.

The closest prototype is the device according to patent RU 2184902, 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, F16L 55/16, 1981, and.with. No. 730379, B05C 7/08, 1980, patent RU 20157465, B05C 7/08, 1992, and.with. USSR No. 1512682, B05C 1/08, 1989, No. 1445810, B05C 1/08, 1988

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

The closest prototype of the coating method and device for its implementation is patent RU 2358186 C2, IPC F16L 58/04, 2006.

The method includes: coating the inner surface of the pipeline when elastic formwork is introduced into the pipeline from its opposite ends in the form of two sleeves, the ends of which are bent and fixed along the perimeter of the pipeline, the formwork is inflated by supplying a fluid agent with the formation of a cavity between the sleeves, the latter is filled with a coating composition, and a continuous coating is applied by rolling through the pipe hoses, between which the coating composition is moved through the pipe, the diameter of one sleeve being equal to the inside it pipe diameter, and the other - the inner diameter of the coated pipe, increases the rate of formation of the coating and the length of the coated portion, and the thickness of the coating.

A device for plugging and coating a pipeline, including chambers with mounted drive reversing drums mounted on the ends of the pipeline, the sleeves form bent sections of the cavity that are in communication with the fluid supply system of the agent, while in one of the chambers the sleeve is made of separate sleeves, interconnected, and the diameter of the sleeve (s) is less than the inner diameter of the pipe to be coated, the rate of formation of the coating and the length of the coated section, as well as ina applied coating.

The disadvantages of these methods and devices is that with large diameters (more than 800 mm) and the length of the restored area of more than 500 m, the launch and reception chambers become huge. This requires special equipment for their transportation and installation.

The second significant disadvantage is the significant consumption of fluid agent.

Other disadvantages are: long duration of work; the need for the formation of pits of significant size; high cost of equipment; excess consumption of coating material; difficulty in performing work in urban conditions.

The objective of the invention is to increase the speed of coating and the thickness of the coating. The problem is achieved by the combination of applied inventions.

A method of coating a pipeline includes moving the coating composition through the pipeline in a cavity formed by two sleeves, and applying this composition to the inner surface of the pipeline, the sleeves being previously placed in the restored pipeline and forming cavities by bent sections of the sleeves, after which the sleeves are inflated to the walls of the pipeline into the cavity a coating composition is pumped between the sleeves of the pipeline, then the sleeves and the coating composition are moved through the pipeline, with the sleeve in the next section t pipelines are moved by turning it from the previous section of the pipeline.

Particular cases of the method are possible in which: the sleeves are moved in the pipeline in both directions; sleeves are moved in the pipeline by tori; the coating composition is moved between the torus and the sleeve.

The method of cleaning the pipeline consists in moving by rolling the sleeve, by supplying gas to the cavity formed by the bent portion of the sleeve, while gas from this cavity is periodically released into the pipeline into which water is additionally supplied, while releasing the cable, the sleeve is transferred to a new stream of water cleaning area.

The device for coating the pipeline contains two sleeves laid in the pipeline and forming cavities with the bent ends of the sleeves in communication with the fluid agent supply systems, as well as a supply system for the coating composition in communication with the cavity formed by the sleeves, while a flexible connection is laid in one sleeve, the end of the sleeve bent and connected with a flexible connection, the second end of the flexible connection is connected to the traction mechanism, the device is equipped with a pipe, the cavity of which is in communication with the supply system of the coating composition, and the end of the sleeve is fixed It is located along the perimeter of the nozzle, while the device is equipped with a torus, which is connected by a flexible connection to the traction mechanism.

Moving the sleeve to the next section of the pipeline by turning it from the previous section of the pipeline increases the speed of work and reduces the cost of their implementation. Moving the hoses to both sides of the pipeline speeds up work. Moving the hoses in the pipeline with tori increases the speed of work. The movement of the coating composition in the pipeline between the sleeve and sleeve also increases the speed of work.

The method of cleaning the pipeline by moving the sleeve by rolling and supplying gas to the cavity formed by the bent portion of the sleeve, the gas is periodically released from this cavity into the pipeline, which is additionally supplied with liquid (water), moving the sleeve to a new section increases the cleaning speed. Periodic increase in the volume of the sleeve cavity during movement increases the cleaning speed. The implementation of the device for coating of two sleeves laid in the pipeline, forming cavities with the bent ends of the sleeves, which in the pipeline form a cavity in communication with the supply system of the coating composition, placing in one of the sleeves a flexible connection and connecting the end of the bent portion of the sleeve with a flexible connection and connecting the second the end of the flexible connection with the traction mechanism and supplying the device with a pipe that is in communication with the supply system of the coating composition, and securing the end of the sleeve around the perimeter of this pipe, while The device is additionally equipped with a torus, which is connected by a flexible connection with the traction mechanism, simplifies the technology of work and increases the speed of their execution.

In the drawings shown: figure 1 - sleeve with a flexible connection; figure 2 - sleeve laid in a flexible connection; figure 3 - a device for laying a sleeve in a pipeline, moving in both directions; figure 4 - a device for laying a sleeve in a pipeline, fastened with one flexible connection; figure 5 - a device for laying sleeves on both sides of the pipeline; figure 6 - diagram of the restoration of the pipeline; 7 is a diagram of the restoration of the pipeline with a torus; on Fig is a diagram of the restored section of the pipeline; figure 9 is a diagram of the preparation of the coating for the subsequent restoration of the pipeline; figure 10 is a diagram of the restoration of the pipeline; figure 11 - device for cleaning the pipeline; on Fig, 13, 14 is a diagram of the cleaning of pipelines.

The device depicted in figure 1, is made of a sleeve 1, laid in the form of a tape. One end of it with a clamp 2 is connected to a flexible connection 3 (cable, tape).

The device depicted in figure 2, is made of a sleeve 1 with a cable 3 laid in it (flexible connection). The inwardly bent end of the sleeve 1, for example, with a clamp 4, is connected to the cable 3.

The device shown in figure 3 is made of a torus 5, covered by one or two endless ribbons 6, covering rollers 7, mounted for rotation in the bracket 8, in which the fastening element 9 of the cable 3 is installed. This mechanism (traction mechanism) 10 is designed to move in both directions.

The device depicted in figure 4 is made of a torus 5, covered by one or two endless ribbons 6, covering rollers 7, mounted for rotation in the bracket 8, in which the fastening element 9 of the cable 3 is installed. This mechanism (traction mechanism) 11 is designed for drawing the sleeve 1 into the pipeline 12 with one cable 3. Top 5 is filled with a fluid agent 13 (liquid, gas, powder).

The device shown in Fig. 5 is made of a container 14 with tension mechanisms 15 installed in the cups 16. Two hoses 1 are laid in the container 14 by hoses 17, which pass through the rollers 7 and are connected to mechanisms 11 by cables 3. The hoses 1 pass through the seal 18. The pipe 19 (well) is in communication with the pipe 12. The pipe 20 is connected to the container 14. A torus 21 is installed on the pipe 20, interacting with the pipe 19. Top 22 is installed in the pipe 20 on the sleeves 1 and seals the cavity 23. The fluid agent supply system 24 (compressor) communicated with cavity 23.

The device shown in Fig.6 is made of mechanisms (traction mechanisms) 25, 26, 27 installed above the wells (pipes) 28. The mechanism 25 has a winch that moves the cable 3, which is located in the pipe 29. The mechanism 27 contains a pipe 30 s holes 31. The pipe 30 is in communication with the feed system of the coating composition - further composition (not shown in the drawing). The mechanism 26 includes a pipe 32. The pipes 30, 32 are connected to the nozzles 33, on which the ends of the sleeves 1 are fixed by clamps 34. The coating 35 is coated on the inner surface of the pipe 12. The pipe sections 12 are plugged with tori 36. The tori 37 are installed in the wells 28, through which pipes 29, 30, 32.

The device shown in Fig.7 is made of chambers 38, 39, which are installed in the wells 28 with the tori 37. The chamber 38 is in communication with the fluid agent supply system 13 (compressor). At the same time, a reversible driving drum 40 is mounted on the shaft 41. A flexible connection 3 (cable) is wound on the drum 40 and connected to the mechanism 11. The chambers 38, 39 have a bracket 42 on which the rollers 43, 44 are fixed. The roller 43 is mounted on the bracket 45. The cable 3 can be connected to the fastening element 9. The pipe 30 with holes 31 is connected to the supply system of the composition (not shown in the drawing). The shaft 41 is connected by a hose 46 to the pipe 47, in which an end 48 of the bent sleeve 1 is fixed along its perimeter. The pipe 47 is installed in the tray 49.

The device depicted in Fig. 8 is a diagram of a restored pipeline 12 (section). After disconnecting the ends 48 of the sleeve 1 they are straightened. Coating 35 is applied to the pipe 12.

The device shown in Fig.9, represents the preparation of the sleeve 1 to cover the next section of the pipeline 12. For this, the right end 48 of the sleeve 1 is disconnected from the cover 35, for example, by supplying air to the right well 28. In this case, the sleeve 1 is folded into a tape. The right end 48 of the sleeve 1 is connected to the cable 3, and the left end 48 of the sleeve 1 is secured with a hose clamp 34 around the perimeter of the pipe 33. The composition is fed through the pipe 46 to the pipe 33.

The device shown in Fig. 10 is made of mechanisms 25, 26, 27 mounted above the wells 28. Tori 37 are installed in the wells 28, through which pipes 29, 30, 32, 51 pass. A cable 3 is laid through the pipe 12 and the wells 28 connected to the mechanism 11 and the drum 40. The end pipelines 12 are plugged by tori 36.

The device depicted in Fig. 11 is made of chambers 52, 53, which are installed in the wells 28 with tori 37. In the chambers 52, 53, drive reverse drums 40 are mounted on which a cable 3 or hose 46 is wound. The chamber 52 is in communication with the pump 54 The chamber 53 is in communication with the compressor 55. The end 48 of the sleeve 1 is fixed along the perimeter of the pipe 33 with a hose clamp 34. The end 57 of the sleeve 1 is connected with a cable 56 with a cable 3. The sleeve 1 in the folded state is located in the cavity 58 of the pipeline 12. Before the sleeve 1 in the cavity 59 of the pipeline 12 there are deposits of 60.

On Fig, 13, 14 presents a diagram of the operation of the device depicted in Fig.11.

On Fig presents sleeve 1, moving through the pipe 12 through the cavity 59 due to the supply of compressed air by the compressor 55 to the cavity 61 formed by the bent portion of the sleeve 1.

On Fig shows the open end of the sleeve 1.

On Fig shows the sleeve 1 after the release of air from it.

The device depicted in figure 1, operates as follows. The sleeve 1, folded into the tape with a clamp 2, is connected to the cable 3.

The device depicted in figure 2, operates as follows. The cable 3 is laid in the sleeve 1 and its end is turned inside out and fastened with a cable tie 4 to the cable.

The devices depicted in figure 3, 4, operate as follows. The mechanisms 10 and 11 are installed in the pipeline 12. To the element 9 is attached, for example, a cable 3 with a sleeve, which are shown in figure 1. By supplying compressed air to the pipe 12 by the compressor 55, the mechanism 10 is moved through the pipe 12, which draws a cable 3 with a sleeve 1 into the pipe 12.

The device depicted in figure 5, operates as follows. Two sleeves 1 with a cable 3 are laid on the container 14 with hoses 17. Hoses 1 are connected by cables 3 with mechanisms 11, which are installed in pipelines 12. The pipe 19 is sealed with a torus 21. Then compressed air is supplied by system 24. The mechanisms 11 are moved along the pipelines 12 in different directions. After the sleeves 1 are fully retracted into the pipeline, the system 24 is turned off.

The device shown in Fig.6, operates as follows. The feed system of the coating composition of the mechanism 27 serves the composition through the pipe 30, which through the holes 31 enters between the arms 1. The left sleeve 1 is started to be pulled into the pipeline with a cable 3, mechanism 25. The composition moves after the left sleeve 1. After the specified portion of the composition, compressed air is supplied through the pipe 29, which moves the right sleeve 1. Both hoses synchronously with the composition move along the pipe 12. The composition covers the inner surface of the left pipe 12. On the freshly applied coating Pipeline right sleeve 1. After the left sleeve 1 is completely withdrawn from conduit 12, into the right sleeve 1, compressed air is pumped to the required pressure and the sleeve 1 is maintained under pressure until solidification of the composition.

The device shown in Fig.7, operates as follows. Through the hose 46 in the pipe 47 serves the composition. The cable 3 begins to withdraw the mechanism 11 from the pipeline 12. The composition, moving behind the mechanism 11, fills the cavity of the pipeline 12. After the entire portion of the composition is fed into the pipeline 12, the sleeve 1 begins to move, supplying compressed air to it with a compressor. The sleeve 1, moving along the pipeline 12, applies a coating layer to the inner surface 12 and, rolling on a freshly applied coating, closes it. After the sleeve 1 covers the entire section of the pipeline 12, a predetermined pressure of compressed air is created in it and the pipeline 12 is held under pressure until the composition solidifies.

The device shown in Fig. 8 operates as follows. The cable 3 mechanism is moved along the pipe 12 to the subsequent section of the pipe 12 (not shown). The ends of the sleeve 1 are disconnected from the nozzles 47.

The device shown in Fig.9, operates as follows. A hose 46 into the pipe 33 serves a portion of the composition. When the composition is fed through the pipeline 12, the mechanism 11 is moved. After supplying the entire portion of the composition, compressed air is supplied by the system 13. The sleeve 1 is synchronously with the mechanism 11 and the composition is moved through the pipe 12. After turning the sleeve 1 over its entire length, it is left under pressure until the composition hardens, and the mechanism 11 is moved to the next section of the pipeline 12.

The device depicted in figure 10, operates as follows. As described above, all sections of pipeline 12 are sequentially covered. After covering all sections of pipeline 12, all mechanisms and plugs are removed, and the pipeline is put into operation.

The device shown in Fig.11, 12, 13, 14, operates as follows. Gas (air) is supplied to cavity 48 under pressure, and liquid (water) is supplied to cavity 59. The drum 40 of the chamber 53 rotates and unwinds the cable 3. The sleeve 1 moves along the pipe 12 and pushes water in front of it, which erodes the deposits. The washed out deposits together with water are taken out from the pipeline 12. This position is depicted in Fig. 12.

On Fig shows the opening of the end of the sleeve 1. This occurs when the sleeve 1 is completely turned inside out. The air in the cavity 61 escapes into the cavity 59 and disperses the water, which washes away harder deposits.

On Fig shows the position of the sleeve 1, in which the destruction of very hard deposits. After air leaves the cavity 61, water compresses the sleeve 1, its volume decreases, and the pipe 12 under the sleeve 1 is filled with water. Then the end of the sleeve 1 is closed by pulling it with a cable 3. After that, a large volume of air is supplied into the cavity 61 of the sleeve 1. Sleeve 1 increases in diameter and squeezes water out from under sleeve 1. Water gains even greater speed and mixes with the smallest particles of deposits that accelerate. With certain parameters of the air volume and its pressure, cavitation occurs, which destroys very hard deposits. Opening and closing the end of the sleeve 1, achieve a great acceleration of the flow of water and significant water hammer, contributing to the destruction of sediments. Water hammer vibrates the pipeline and deposits with different amplitudes and frequencies, which contributes to a significant destruction of deposits and separation of deposits from the wall of the pipeline. After cleaning the pipeline from deposits, the sleeve is removed from the pipeline 12. By releasing the cable 3, the sleeve 1 is moved by a stream of water to a new cleaning section.

Example

Pipeline 12 of pressure head sewage ⌀800 mm and length 2000 m was cleaned of deposits. The drain pressure was 0.8 MPa. To implement the method, a sleeve was made of polypropylene 2 mm thick. The sleeve diameter is ⌀800 mm and the length is 200 m. The cable length is 2000 m.

Air was periodically pumped into cavity 61 at a pressure of 0.9 MPa, every 10 minutes it was released from the sleeve.

With a stream of water, sleeve 1 moved through the pipeline at a speed of 0.5 m / s. After the sleeve 1 has moved to the end of the pipeline 12, it was removed from the pipeline. The sleeve was disconnected from the cable 3 and the cable 3 was removed from the pipeline by winding it onto the drum.

When teleglip examination of the cleaned surface of the pipeline revealed that the surface of the pipeline is cleaned well.

Example

A pipeline of ⌀800 mm and a length of 2000 m of pressure sewer was restored (steel pipe).

Coating was carried out with fiber concrete with basalt fiber. The solution is a cement-sand mixture.

The coating was carried out with a sleeve and a torus of ⌀800 mm. In the sleeve, the diameter was reduced to 790 mm every 30 m. The width of the ring was 100 mm. Initially, fiber reinforced concrete rings were applied to the surface of the pipeline. After that, a continuous coating with a thickness of 5 mm was formed by rolling through rings of a sleeve of 90790 mm and a torus of ⌀790 mm and a cork of fiber-reinforced concrete, as described in patent RU 2358186, and according to FIG. 10. Such a sleeve forms a coating with a thickness of 0.5-1 mm. If you need more thickness, then the coating is applied in two or three doses.

The use of the invention can significantly increase the speed of work and simplify the technology.

Claims (6)

1. The method of coating the pipeline, including moving the coating composition through the pipeline in a cavity formed by two sleeves, and applying this composition to the inner surface of the pipeline, the sleeves being pre-placed in the restored pipeline and form cavities by bent sections of the sleeves, after which the sleeves are inflated to the walls of the pipeline and then the coating composition is pumped into the cavity of the pipeline between the sleeves, and then the sleeves and the coating composition are moved through the pipeline, with the sleeve on the trail conduit portion is moved through its eversion from the previous section of the pipeline. 2. The method according to claim 1, characterized in that the sleeves are moved in the pipeline in both directions. 3. The method according to claim 1, characterized in that the sleeves are moved in the pipeline by tori. 4. The method according to claim 3, characterized in that the coating composition is moved between the torus and the sleeve. 5. The method of cleaning the pipeline, which consists in moving by rolling the sleeve, by supplying gas to the cavity formed by the bent portion of the sleeve, while gas from this cavity is periodically released into the pipeline into which water is additionally supplied, while releasing the cable, the sleeve with a stream of water moved to a new cleaning site. 6. A device for coating a pipeline, including two sleeves laid in the pipeline and forming cavities with the bent ends of the sleeves in communication with the supply systems of the fluid agent, as well as the supply system of the coating composition in communication with the cavity formed by the sleeves, while a flexible connection is laid in one sleeve while the end of the sleeve is bent and connected with a flexible connection, and the second end of the flexible connection is connected to the traction mechanism, while the device is equipped with a pipe, the cavity of which is in communication with the feed system of the coating composition and the end of the sleeve is fixed around the perimeter of the nozzle, while the device is equipped with a torus, which is connected by a flexible connection with the traction mechanism.

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