RU2459134C2 - Method to restore and build pipelines and device for its realisation - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: method includes laying two coaxially arranged sleeves, supply of a mortar into a cavity formed by sleeves, and further shaping of a pipeline wall from the mortar and sleeves. Some ends of sleeves are fixed in the beginning of the pipeline, and ends of sleeves at the opposite end of the pipeline are fixed on the nozzle. The external sleeve is fixed along the perimetre of the external surface of the nozzle, and the internal sleeve is pulled via the nozzle, bent and fixed along the nozzle perimetre. A specified mortar portion is supplied into a cavity formed by sleeves, at the same time the pipeline wall shaping is carried out by rolling of a fluid agent along the internal sleeve of the third additional sleeve by supply into a cavity formed by its bent ends. The device comprises a chamber, where two coaxially installed sleeves are installed, as well as a mechanism of sleeve displacement. The displacement mechanism is arranged from a chamber, where ends of sleeves are bent and fixed along the nozzle perimetre. The cavity formed by bent ends with a system of fluid agent supply. The device also comprises a mechanism to form a pipeline wall, at the same time ends of sleeves form a cavity, which is communicated with a system of mortar supply, and an inlet nozzle. The shaping mechanism is installed on the opposite end of the pipeline and is arranged from a chamber, where a driven reversing drum is installed. A sleeve with a flexible joint is wound onto the drum. The end of the sleeve is bent and fixed along the chamber perimetre. The inlet nozzle is installed on the opposite end of the pipeline in the internal coaxially installed sleeve. Its thickness is equal to the thickness of the pipeline wall.

EFFECT: better performance of a pipeline.

2 cl, 4 dwg

Description

The invention relates to the field of construction and can be used for construction and rehabilitation of pipelines.

The following technologies are widely used for the construction, reconstruction, and rehabilitation of pipelines:

- Pipeline construction technology by plowing into the ground (plow method);

- pipeline construction technology using horizontal directional drilling;

- technology for the construction of pipelines by the method of shock-pulse punching using pneumatic impact machines and punching machines;

- construction technology using microtunneling;

- technology for the restoration of pipelines by applying internal cement-sand coatings;

- technology for the restoration of pipelines using continuous polymer coatings (method "Phoenix");

- technology for the restoration of pipelines using complex polymer hoses;

- technology for the restoration of pipelines by drawing polymer pipes in them (without destruction and with the destruction of old ones);

- organization of construction and standard technological schemes of work;

- technology of pulling polyethylene profile pipes;

- technology for the restoration of pipelines by using polymer pipe modules;

- technology for the restoration of pipelines by force vibration-free bursting;

- technology for the restoration of pipelines with a stainless steel sleeve;

- technology for the restoration of pipelines by using pipes of ductile iron with nodular graphite (VChShG);

- technology for the restoration of pipelines with composite elements from supporting fiberglass structures;

- technology for the restoration of siphons using two-layer polymer structures;

- technology of vibration-free displacement of the old into the ground and laying of a new pipeline ("Berst: Limng");

- technology of point (local) restoration of pipelines using resins, inserts, bandages.

These technologies are described in MGSN 6.01-03, TSN 40-303-2003, Moscow, Moscow, 2004. Adopted and enforced by Resolution of the Government of Moscow dated August 03, 2004 No. 530-PP. Registered by the Gosstroy of Russia as territorial building codes TSN 40-303-2003 in Moscow, letter dated March 4, 2003 No. 9-29 / 163.

The main disadvantages of all the described technologies are:

- insufficient speed of work;

- high cost;

- a large volume of transport services;

- insufficient strength and durability of the pipeline. A known method of constructing pipelines is that they dig a trench, weld a whip of pipes that are lowered into the trench and isolate the pipes before that. After this, the pipes in the trench are covered with soil. Grigoryev EA, Zhukov F.F., Construction of external networks of water supply and sewage. Ed. MKHRSFSR, 1957

The disadvantages of this method are:

- low productivity;

- the need for excavation of soil;

- high cost of work;

- low durability.

To implement this method, commercially available excavators, welding machines, pipe layers, etc. are used. Barishpolov V.F. Construction of external heating networks, Moscow: Stroyizdat, 1974

The disadvantages of these devices are: a large amount of equipment; low productivity; high price.

The main problems in the maintenance of pipelines are their clogging and corrosion of metals, which complicates the supply of raw materials and leads to the need for their frequent replacement. However, replacing pipelines is a rather labor-intensive and energy-intensive operation.

A known method of repairing an underground pipeline, in which the inner surface of the pipeline is cleaned, residual liquid is removed and a coating is formed on it, forming a new pipe in the old pipeline (see RF patent 2052168 C1, F16L 55/18, 01/10/96)

The disadvantage of this method is that the resulting coating is not strong enough.

A known method of repairing a pipeline, in which the plugging of the pipeline is carried out by injection through the fistula of the cement slurry before removing residual liquid from it after cleaning. Patent RU 2178857 F16L 55/18, 58/10, 2002

In practice, this method is not feasible for repairing the pipeline, since the grout is mixed with water and after the plugging process is completed, the grout again flows through the fistula back into the pipeline. At the same time, part of the water in the pipeline after purification fills all its annulus through fistulas.

Therefore, plugging pipelines in this way is not feasible.

A known method of applying to the inner surface of the pipeline a stronger coating in the form of a new pipe (see patent RU 2025635 C1, F16L 55/18, 30.12.94), in which the pipe is used in a flattened state and in an abbreviated form with the possibility of preserving the memory of an abbreviated shape, whose maximum size is less than the inner diameter of the existing pipeline. Further, the pipe is heated over its entire length in its shortened form to a flexible condition in the longitudinal direction. Then, the front end of the new pipe in a heated flexible state is inserted into the existing pipeline. The new pipe is rounded off by conversion from a shortened to a tubular shape by heating and applying internal pressure simultaneously to the flattened and bent pipes. After this, the new pipe is cooled to stabilize it in a tubular form.

This coating method is expensive and time consuming, as It requires long-term heating of the pipe along its entire length and complex special equipment for installation.

There is also known a method of applying a protective and sealing coating to the inner surface of a pipeline (patent RU 2107216 C1, F16L 55/18, 03/20/98) by introducing into the pipeline a tubular sleeve made of fibrous material impregnated with a curing binder and enclosed in a flexible shell made of a polymeric material by eversion and advancement of the sleeve into the pipe, as well as its deployment and pressing to the inner surface of the pipe due to the pressure of the fluid and its subsequent hardening. In this case, the sleeve is turned in and out inside the pipe, as well as it is turned around and pressed against the inner surface of the pipe due to the pressure on the inner surface of the turned sleeve, created by the body weight of the water column. The advancement of the sleeve into the pipe is carried out at a pressure lower than the pressure when fully expanded and the sleeve is pressed against the inner surface of the pipe.

The disadvantage of this method is the complexity of the installation for moving the sleeve into the pipeline, its significant vertical dimensions, as well as the fact that the sleeve impregnated with the hardening binder is pressed against the inner surface of the pipeline at the same time along its entire surface, which leads to insufficient quality of sleeve compression along the length of the pipeline.

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 these methods 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 C. F16L 55/16, 1981, A.S. No. 730379, Cl. B05C 7/08, 1980, patent RU No. 20155746, B05C 7/08, 1994, patent RU No. 20155742, B05C 1/08, 1992, A.S. USSR No. 1512682 class B05C 1/08. 1989, A.S. USSR No. 1445810, Cl. 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 is a device according to RU 2015742 C1 B05C 1/08, 1994

The disadvantage of this device is that it is not very effective for applying a cement-sand mixture.

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 A, B22F 7/04, 1989, or A.S. USSR No. 1491221, F16L 58/02, 1982

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

A known method of coating a pipeline, including moving the sleeve along the pipe of the inverted sleeve, applying a layer of adhesive on the inner surface of the pipeline, pressing the sleeve to the inner surface of the pipeline. WO 86/02425 A1, 04.24.1986

The disadvantage of this method is that it is difficult to cover long pipelines and provide greater pipeline strength.

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 C. F16L 55/16, 1981, A.S. No. 730379, Cl. B05C 7/08, 1980, patent RU 2015746, B05C 7/08, 1994, patent RU No. 20155742, 5 B05C 1/08, 1992, A.S. USSR No. 1512682 class B05C 1/08, 1989, A.S. USSR No. 1445810, Cl. B05C 1/8, 1988

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

A known method of introducing the sleeve into the pipeline, including laying the sleeve in the chamber, securing one of the ends of the sleeve around the perimeter of the chamber, supplying a fluid agent to the cavity formed by the bent portion of the sleeve. A.S. USSR No. 1041179 B22F 7/07, 1989

A device for introducing a sleeve into a pipeline is known, consisting of a housing in communication with a fluid agent supply system, a drum with a sleeve, and an element for connecting the chamber to the pipeline. A.S. USSR No. 1512682 class B05C 1/08, 1989

The disadvantages of these methods and devices are:

- design complexity;

- large dimensions and weight;

- the difficulty of regulating the pressure in the cavity formed by the bent portion of the sleeve;

- small length of the sleeve placed in the chamber;

- the difficulty of connecting the camera to the repaired section of the pipeline;

- the difficulty of pumping adhesive into the pipeline;

- the complexity of the withdrawal of the sleeve from the pipeline.

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. 20155746, B05C 7/08, 1994, C 1/08, 1992, and.with. USSR No. 1512682, cl. B05C 1/08, 1989, A.S. USSR No. 1445810, class B05C 1/08, 1988

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

This method can only be used with an old pipeline. It cannot be used in the trench method of pipeline construction.

The objective of the invention is the expansion of functionality, as well as improving the technical and economic characteristics of the pipeline.

The task is achieved by the combined use of a group of inventions.

The layout of the two coaxially laid sleeves, with the solution being supplied to the cavity formed by the sleeves, and the further formation of the pipe wall from the solution and the sleeves allows the method to expand its functionality, as it allows the pipe to be formed both in the pipeline and without it.

Fixing one end of the coaxially laid sleeves at the beginning of the pipeline and attaching the opposite ends to the pipe with the formation of the cavity into which the solution is pumped, simplifies the technology and reduces the number of necessary equipment and increases the rate of pipe formation at the lowest cost.

The outer sleeve is fixed along the perimeter of the outer surface of the nozzle, and the inner sleeve is passed through the nozzle, bent and fixed along the perimeter of the nozzle, and a predetermined portion of the solution is fed into the cavity formed by the sleeves.

The formation of the wall of the pipeline, which is produced by rolling along the inner sleeve of the third additional sleeve by feeding into the cavity formed by its bent ends, a fluid agent, allows you to form the wall of the pipeline of fiber concrete.

The implementation of the device for implementing the method of the Camera, in which two coaxially mounted sleeves and a mechanism for moving coaxially mounted sleeves are located, allows you to adjust the diameter of the pipeline and its technical characteristics.

The implementation of the mechanism for moving the sleeves from the chamber, in which coaxially mounted sleeves are placed, the ends of which are bent and fixed along the perimeter of the nozzle, while the cavity formed by the bent ends of the sleeve, with a fluid agent supply system, the device includes a pipe wall forming mechanism, allows you to adjust the speed the formation of the pipeline, its strength properties and dimensions.

The ends of the coaxially mounted sleeves form a cavity that is in communication with the solution supply system.

The formation of a cavity of coaxially installed sleeves by fixing their ends and the communication of this cavity with the solution supply system can significantly reduce the consumption of materials and simplify the technology of forming the pipeline.

Placing the mechanism for forming the pipeline wall at the opposite end of the pipeline and executing it from the chamber in which the drive reversing drum is mounted, on which a sleeve with a flexible connection is wound, the end of which is bent and fixed around the perimeter of the chamber pipe, the cavity formed by the bent ends of the sleeve, is communicated with a fluid agent supply system.

The supply of the device with an inlet pipe, the thickness of which is equal to the thickness of the pipeline wall, while the pipe is installed on the opposite end of the pipeline in the inner coaxially mounted sleeve, allows you to get a uniform coating of a given thickness along the entire length of the pipeline.

The drawings show:

figure 1 - a device for installing hoses;

figure 2 - a device for the formation of cavities;

figure 3 - a device for forming the walls of the pipeline;

figure 4 - finished pipeline.

The device depicted in figure 1 is made of a chamber 1 in communication with a fluid supply system 2. In the chamber 1, a drum 3 is mounted on which sleeves 4, 5 of different diameters are wound, mounted coaxially, with the sleeve 5 being external and the sleeve 4 being internal.

The ends of the sleeves 4, 5 are bent and fixed on the ring 6, which is installed in the pipe 7 of the chamber 1. The chamber contains a valve 8 for removing a fluid agent. Sleeves 4, 5 are installed in the pipeline 9 or outside it.

The device shown in figure 2, further comprises a pipe 10, on which the ends of the sleeves 4, 5 are fixed. A clamp 11 secures the end of the outer sleeve 5. A clamp 12 secures the end of the inner sleeve 4. The cavity 13 is in communication with the solution supply system 14.

The device shown in figure 3, is additionally made from the mechanism of the formation of the wall of the pipeline, which is made of a chamber 15 in communication with the system 16 for supplying a fluid agent. A reversible drive drum 17 is mounted in the chamber 15, on which a flexible connection 18 (not shown) is wound, which is connected to the drum 17. A flexible connection 18 is connected to the end of the sleeve 19, the end 20 of which is bent and secured around the pipe 21 by a collar 22. The sleeve 19 passes through the pipe 10 and forms a gap 23 with the wall of the pipe 9 or the inner sleeve 4, equal to the thickness of the coating wall, the cavity 13 is filled with solution 24.

Figure 4 shows the finished pipeline made of sleeves 4, 5, between which the solution 24 is located.

The device depicted in figure 1, operates as follows.

System 2 serves in the chamber 1 fluid agent (compressed air). Sleeves 4, 5 are moved along the pipeline 9, reeling off from the drum 3.

The device depicted in figure 2, operates as follows.

After the sleeves 4, 5 are unwound to the full length and exit the pipeline 9, the outer sleeve 5 is fastened with a clamp 11 on the nozzle 10. The inner sleeve 4 is pulled through the nozzle 10, the end is unbent and secured with a clamp 12 on the nozzle 10. System 14 into the cavity 13, solution 24 is supplied. After supplying a predetermined portion of solution 24, its supply is stopped.

The device depicted in figure 3, operates as follows.

Sleeve 19 is inserted into inner sleeve 4. By system 16, a fluid agent (compressed air) is introduced into chamber 15. The sleeve 19 begins to move along the pipe 10, pressing the sleeves 4, 5 to each other. After the sleeve 19 passes through the pipe 10, it forms a pipe wall made of sleeves 4, 5 and solution 24 (figure 4). The sleeve 19 presses on the inner sleeve 4, which moves the solution 24 along the gap 23, forming a wall of the pipeline. After the sleeve 19 enters the ring 6, the sleeve 19 is kept in the pipeline under pressure until the solution 24 solidifies. After that, winding the sleeve 19 onto the drum 17, it is removed from the inner sleeve 4. After the sleeve 19 is removed from the pipe 10, chamber 1, 15 are dismantled. In the pipeline 9, a new pipeline was formed from the sleeves 4, 5 and the solution layer.

Example

The pipeline was restored with a diameter of 1400 mm and a length of 500 mm, two sleeves 505 m long and a diameter of 1400 mm and 1380 mm were made of propylene with a thickness of 1 mm. A cement-sand mixture with basalt fiber was prepared.

The method was carried out by the devices shown in figure 1, the sleeves 4, 5 were introduced into the pipeline. After their arrival at the end of the pipeline 9, the ends of the sleeves 4, 5 were fixed on the pipe 10, according to figure 2. After that, fiber reinforced concrete was pumped into the cavity 13 in an amount equal to the volume of the gap formed by the sleeves 4, 5. The length of the gap is 500 m, according to FIG. 2.

After that, the device depicted in figure 3, formed a pipeline, and under a pressure of 1.5 MPa it was held until hardened for 48 hours. After that, the sleeve 19 was removed from the inner sleeve 4. A new pipeline was obtained (Fig. 4). The pipe 9 is not shown.

Using the invention allows the manufacture of pipelines of any diameter and length. Diameter up to 6 m, length up to 2 km.

Claims (2)

1. A method of construction and restoration of pipelines, including the layout of two coaxially laid sleeves, feeding the solution into the cavity formed by the sleeves, and further forming the pipe wall from the solution and the sleeves, while one ends of the sleeves are fixed at the beginning of the pipeline, and the ends of the sleeves at the opposite end of the pipeline fixed on the nozzle, and the outer sleeve is fixed around the perimeter of the outer surface of the nozzle, and the inner sleeve is passed through the nozzle, bent and fixed around the perimeter of the nozzle, and a predetermined portion of the solution is supplied into the cavity formed by the sleeves, while the formation of the pipe wall is carried out by rolling along the inner sleeve of the third additional sleeve by supplying a fluid agent to the cavity formed by its bent ends. 2. The device for implementing the method according to claim 1, consisting of a camera in which two coaxially mounted sleeves and a mechanism for moving coaxially mounted sleeves are placed, wherein the sleeve movement mechanism is made of a camera in which coaxially mounted sleeves are placed, the ends of which are bent and fixed along the perimeter of the nozzle, while the cavity formed by the bent ends of the sleeve is in communication with the fluid agent supply system, the device includes a mechanism for forming the pipe wall, while The coaxially mounted sleeves form a cavity that is in communication with the solution supply system, the pipe wall forming mechanism being placed at the opposite end of the pipe and made of a chamber in which a drive reversing drum is mounted on which a sleeve with a flexible connection is wound, the end of which is bent and fixed along the perimeter of the chamber, while the cavity formed by the bent ends of the sleeve is in communication with the fluid agent supply system, while the device is equipped with an inlet pipe, the thickness of which is equal to Thickness of the pipeline wall, the nozzle is mounted on the opposite end of the inner pipe coaxially installed sleeve.

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