Method of pipeline recovery, device for pipeline isolation and coating, method and device for related device cleaning

FIELD: construction.

SUBSTANCE: internal surface of pipeline is cleaned by cleaning mechanism displacing inside the pipe. The cleaning mechanism is comprised of a shaft with naves and elastic and flexible blades being mounted on the naves in staggered order. The blades generate liquid jets that damage deposits on the pipeline walls. The hydraulic resistances are oscillated in liquid flow and hit pipeline wall. There are chambers installed on the ends of pipeline, where drums and sleeves are inserted. The end of sleeve is bent and forms cavity, which is connected to the liquid agent supply system. Flexible casing in the form two sleeves is inserted into the pipe from the opposite sides. The ends of both sleeves are bent and fixed around pipeline perimeter. The casing is inflated by supplying liquid agent. As a result a cavity is form between sleeves and filled up with solution. Solid coating is applied by sleeves over-rolling along the pipeline with the solution being delivered between them. Diametre of one sleeve is equal to inner pipeline diametre, while the other sleeve diametre is similar to inner pipeline diametre plus applied coating.

EFFECT: wide range of facilities.

6 cl, 11 dwg

 

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

A known method of cleaning pipelines from deposits, namely, that the pipeline pressure fluid move trubochista device, the fluid flow through the treatment device in the form of jets which remove deposits from the inner surface of the pipe, for example, international application WO 86/02293, WV 9/04, C23F 11/00 from 24.04.1986,

The disadvantage of this method is that it is inefficient clears the pipelines with deposits, the hardness of which is greater than 2 units on the Mohs scale.

The closest prototype is a cleaning method in which fluid flow through the pipeline move Trubodetal mechanism with cuffs, on the periphery of which form a liquid jet that removes deposits from the pipe wall, the patent of the Russian Federation, RU 2184902, 7 F16L 58/04 from 31.08.2000,

The known device for carrying out the method, for example, as the USSR B08B 9/047, 995910, 1983, A.S. USSR B08B 9/04, No. 1744844, 1988, A.S. USSR VV 9/04, No. 1688503, 1989

The disadvantage of these devices is that they are not very effectively clean the pipeline from deposits, the hardness of which is greater than 2 units on the Mohs scale.

The closest prototype is a device in patent RU 2184902, 7 F16L 58/04 from 31.08.2000,

There is a method of coating the inner surface is part of a pipeline, when the pipeline move the covering composition, and they cover the surface of the pipeline, for example, as the USSR №1041179, B22F 7/04, 1981 or WO 86/02425 A1, 24.04.1986,

The disadvantage of this method is that they work well with adhesives having good fluidity. When using this method on semantischen mixtures is their separation.

The known device for coating the internal surface of the pipeline, consisting of a fluid supply system agent, the mechanism of coating, for example, EPO patent No. 0082212, CL F16L 55/16, 1981, A.S. No. 730379, CL VS 7/08, 1980, patent RU NO. 20157465, VS 7/08, 1992, 1/08, 1992, A.S. USSR №1512682, CL B05C 1/08, 1989, A.S. USSR №1445810, CL VS 1/8, 1988

The disadvantage of these devices is that they are not very effective when applied semantisches mixture.

The closest prototype is the best way to clean the pipelines, the method of coating pipes and devices (options) for its implementation, EN 2184902 C2, CL 7 F16L 58/04.

The disadvantages of these methods and devices are suitable for use in pipelines with a diameter of more than 500 mm, a very small thickness of the applied coating, the complexity of technologies and devices.

The objective of the invention is to increase the speed of coating and the thickness of the coating.

The task achieves what I set applied inventions.

The method includes: coating on the inner surface of the pipe when injected into the pipeline from the opposite end of the flexible casing in the form of two sleeves, the ends of which are folded and secured around the perimeter of the pipe, the casing is inflated by applying fluid agent with formation of a cavity between the sleeve, the latter filled with solution, and the solid coating is applied by rolling the pipe sleeve, between which move through the pipeline solution, the diameter of one of the sleeve is equal to the inner diameter of the pipeline, and the other to the inner diameter of the pipeline with the coating increases the rate of formation of the coating and the length of the cover section and the thickness of the coating.

Device for plugging and coating of the pipeline, including the camera with installed drive reversible reel mounted on the ends of the pipe, and the sleeve form the bent portions of the cavity, which communicates with the fluid supply system of the agent, while in one of the cells sleeve is made of a separate sleeve, interconnected, and the diameter of the sleeve (sleeve) is less than the internal diameter of the coated pipe, increases the rate of formation of the coating and the length of the cover section and the thickness of the applied pok is itia.

Forming a sleeve from a sleeve made of elastic and inelastic materials, which are connected in series with each other, the sleeve is made of elastic material, or it contains elements that prevent stretching of the sleeve increases the rate of formation of the coating and the length of the cover section, the thickness of the coating.

The best way to clean the pipeline, including a move by pipeline cleaning mechanism, the formation of its periphery jets of fluid flow, the destruction of these jets sediments and removing the fluid flow from the pipeline destroyed sediments, and in the fluid flow faltering hydraulic resistance, which hit the wall of the pipeline, allows to increase the number of cavitary in liquid streams.

A device for cleaning the pipeline, made of a shaft on which the hub attached to them in a checkerboard pattern elastic petals that between hubs installed hydraulic resistance with the possibility of fluctuations relative to the shaft, allows to increase the number of cavitary in liquid streams.

It enhances the power of the acoustic signal.

The performance of hydraulic resistance of the plates, levers, which are kinematically connected with the shaft, allows you to powerfully increase the tee acoustic and hydrodynamic impulses.

The performance of hydraulic resistance in the form of a plate mounted on the shaft with a hole that allows you to increase the power of acoustic and hydrodynamic impulses.

On the submitted drawings shows:

Figure 1 is a camera with a sleeve;

figure 2 is a sleeve of elastic and inelastic materials;

figure 3 - diagram of the device for coating;

figure 4 - diagram of the second stage cover;

figure 5 - diagram restored pipeline;

figure 6, 7, an elastic sleeve with elements that prevent stretching of the sleeve;

on Fig - sleeve, made of inelastic material;

figure 9 is a sleeve made of inelastic material;

figure 10 - cleaning mechanism;

figure 11 - cleaning mechanism.

The camera shown in figure 1, includes a container 1, which has a drive reversing drum 2 with the sleeve 3, the end of which is bent and fixed on the perimeter of the Cup 1, and forms a cavity 4 provided with the system 5 feed fluid agent. The cavity of the pipe 10 before the sleeve 3 is in communication with the system 6 of the feed solution. The sleeve 3 shown in figure 2, is made from the sleeves 7, 8, which are connected tightly between the seam 9.

The sleeve 7 is made of elastic material, for example silicone rubber. Sleeve 8 is made of inelastic material, for example, technical fabrics.

<> Diagram of the device for coating, is shown in figure 3, consists of two cameras mounted on the ends of the pipeline 10.

In the left chamber of the sleeve 3 is made according Fig. Its outer diameter D equal to the inner diameter of the pipeline 10.

The device shown in figure 4, is made of cameras installed at the ends of the pipeline 10, the cells have a sleeve 3 made according to Fig.9. The outside diameter of the sleeve 3 is equal to the inner diameter of coated pipe 10.

Figure 5 shows a scheme of the restored pipe 10, on the inner surface of which is coated with the coating thickness h.

The sleeve 3, is shown in Fig. 6, 7, made of an elastic sleeve 11, on which or in which you installed elements 12, preventing the stretching of the sleeve 11, for example, rings that are made of technical fabrics.

On Fig, 9 shows a sleeve 3 made of technical fabric. The diameter D equal to the inner diameter of the pipeline 10. The diameter D1equal to the inner diameter of coated pipe 10.

Cleaning mechanism, depicted in figure 10, is made of shaft 13 with the hub 14, which staggered set of elastic petals 15 and elastic petals 16. Between the hub 14 mounted hydraulic resistance of a plate 17, which arms 18 connected to the shaft 13 by a pin 19.

Cleaning mechanism, and obrezannyy figure 11, made of a shaft with a hub 14 on which staggered set of elastic 15 and 16 elastic petals. The hole 20 made on the shaft 13, mounted in the arcuate plate 21 on the axis 22. The plate 21 is mounted firing pin 23. The plate 21 by a cable 24 connected to the load 25. The cable 24 passes through the tube 26 inserted in the hole 27 of the shaft 13 in the cross-piece 28.

The tube 26 is made of two parts 29, 30, which have the capability of turning relative to each other. Part 29 of tube 26 is stationary relative to the shaft.

The device shown in figure 10, is as follows:

In the pipeline 10 has established a cleaning mechanism.

In the pipeline 10 filed water. Cleaning mechanism is moved. Part of the water passes through the slit formed by the elastic 15 petals in the form of jets. These jets destroy fat. The destroyed fat stream of water taken out of the pipeline. A jet of water passing through the space between the hub 14, the faltering of the plate 17, which hit the wall of the pipeline 10. Occurs a sound that can be heard clearly on the surface of the earth. This sound can very accurately determine the location of the cleaning mechanism. The oscillation plate 17 causes the braking and acceleration of the liquid jets. This increases the number of cavitate. Hence improves the efficiency of the treatment.

Physics cleanup

To get to the Vitali you must create a flow rate of more than 8 m/s

In industrial pipelines this condition is impossible.

So was invented by a purification method in which a mixed liquid and tiny particles of sediment.

This mixture was dispersed in cracks trubochistah device.

When the jets came out of the cracks, they were hampered because the kinetic energy of the particles sediment more than particles of the liquid.

This results in inhibition gaps fluid stream.

But not all of cavitation bubbles destroy fat. Usually one bubble from 300000 destroys fat.

It is called "aggressive".

The oscillation between the cuffs hydraulic resistance and the attack on the wall of the pipe allows you to get a vibration that pipe, which abruptly increases the number of "aggressive" cavitation bubbles.

The fact that the elastic petals in contact with the wall of the pipeline only by the edges. Therefore, in tens times higher specific pressure petals on deposits. Between the upper blade and the wall of the pipe is formed a slit in the form of a segment. As the elastic petals due to pulsations of the fluid flow range, these vibrations are transferred to the sediments and the pipeline wall. Since the linear expansion coefficients of the sediments and the wall of the pipeline varies, the oscillation frequency of the sediments and the walls of the line is the gadfly also vary while they have different amplitude. There are cases that the deposits and the pipe wall oscillate in opposite phases.

All this leads to the formation of microscale in sediments between the sediments and the wall of the pipeline. These cracks all the time increase and are joined into larger cracks. Further cracks are filled with gas and fluid. When pulsation flow is compressed and liquid gas in the gaps. During the reduction of pressure in the flow in cracks appear forces that tear deposits from the wall of the pipeline.

In the proposed device is "aggressive" was 7% of cavitation bubbles.

The thing is that on the wall of the pipeline remain segmented bands of sediments, formed by the plates of the first cuff.

When the second cuff pressing these bands, there is a grinding of these deposits, which in the space between the cuffs are mixed with the liquid stream and acquire the whirl velocity of the liquid and particulate deposits increased 10-15 times.

The jet of liquid and particulate deposits hit a layer of sediments, which is located on the wall of the pipeline before the first cuff. There is a sharp deceleration of the flow. But since the particle size of sediments have a high kinetic energy than particles of water, the water is decelerated faster than sediment. Between the particle sediments in the particle water gap is formed, i.e. disrupted the continuity of fluid flow, which leads to the formation of cavitation. In addition, a jet of fluid striking the deposits are inhibited. Shock. The pressure in the microscopic cracks increases in 10-50 times.

This ensures that fat serves a substance in the liquid phase and in the zone of destruction of deposits give the substance of the cavitation bubbles, while cavitation bubbles in the material creating by creating a periodically varying pressure with fixed and variable components, and these components are selected from the following formulas:

P1= from 0.3 to 0.7 (P2+P3);

P2+P3-R1= from 1 to 10G;

where P1- constant component pressure (MPa);

P2- the variable component of the pressure (MPa);

P3the vapor pressure of the treated substance at a temperature of submission to the treatment area (MPa);

G - tensile strength of the treated substance at a temperature of submission to the treatment area (MPa).

If all these conditions simultaneous effect of alternating and static pressure of the substance in the liquid phase in the liquid cavitation bubbles are formed at the time when the sum of two values: the amplitude of the alternating pressure and saturated vapor pressure of a substance at a given temperature pre is isit the sum of two values: the static pressure and the strength of the liquid to rupture at a given temperature. This time coincides with the beginning of the negative half of the alternating pressure.

While the liquid of the positive half wave of an alternating pressure on the navigation bubbles operates the sum of the two pressure amplitude of alternating pressure and static pressure, which tends to compress the bubbles, i.e. to slam them. At the time of collapse of bubbles in the wall under the action of the pressure acting on the cavitation bubbles are accelerated, gaining kinetic energy and collide in the center. The value of the acquired kinetic energy is sufficient to break the link between molecules and between nucleons, overcome the forces of repulsion of the nuclei and the interactions between elementary particles in the nuclei of the treated substance. The result is in the local scope of a substance at the time of disappearance of cavitation bubble (slamming) is a nuclear reaction with the release of large amounts of energy, which is sent in the form of shock waves on sediment and destroy them.

The impact of shock waves in liquid cavitation bubbles can improve the energy release on the order, therefore, destructive force acting on the sediments also increases.

If you want to change energuide the Oia change of variable pressure and/or static pressure by changing the power portion of the compressed gas, the pulse stream is generated by increasing or decreasing the supply or exhaust of fluid product in the pipeline and the pipeline.

The oscillation between the cuffs of the hydraulic resistance and the attack on the wall of the pipe allows you to get a vibration that pipe, which abruptly increases the number of "aggressive" cavitation bubbles.

Cleaning mechanism shown at 11, is as follows:

Cleaning mechanism installed in the pipe 10 and to supply water.

Cleaning mechanism moves through the pipeline 10. Part of the water passes through the slit formed by the elastic 15 petals in the form of jets that break down fat. The water in the pipe 10 serves pulses by increasing or decreasing the pressure. If you increase the water pressure for cleaning mechanism plate 21 (hydraulic resistance) opens the opening 20. The firing pin 23 strikes the wall of the pipeline 10. Occurs kick, which determine the location of the cleaning mechanism in the pipeline 10. After opening hole 20, the water pressure for cleaning mechanism is reduced, the plate 21 and the load 25 is returned to its original position. When turning the cleaning mechanism portion 29 of tube 26 rotates with respect to part 30. Therefore, the load 25 always hangs perpendicularly.

Example

Purified pipeline ash 530 mm, d is some 13 km, the thickness of the deposits 120 mm, the hardness of the deposits of 3 units on the Mohs scale. The pipeline is located on the earth's surface. The pipeline has a 4 turn, is equal to 120°. In the pipeline 10 has established a cleaning mechanism, depicted in figure 10, with a diameter of 530 mm post this in the pipeline 10 was pumped water under pressure 1.6 MPa with a flow rate of 4.2 m3in the minute. Beats plates 17 of the pipe was determined by the speed of movement of the cleaning mechanism in the pipeline, which was 3.6 m3in the minute. The water slurry was poured on. the other end of the pipeline in the collection of water and ash. Through 3620 minutes cleaning mechanism is released from the pipeline. Control tenderloin pipeline showed that the pipeline was purified by 97%.

Example

Recovered steel tubing for potable water ⌀500 mm and a length of 300 meters of the Pipeline had end-to-end fistula. The pipeline was purified from the sediments. Manufactured from polyurethane four sleeves. The thickness of the sleeve 4 mm Length sleeveless 310 m the End of each arm of the tape is connected with the driving drum 2. The sleeve 3 made from the sleeves of 7.8 ⌀480 mm, length 10 m Sleeve 7 made of silicone rubber, and a sleeve 8 made of rubber fabric. Sleeves 7, 8 are tightly glued together. Made two sleeves ⌀480 mm, length 310 m Made one sleeve ⌀500 mm, a length of 310 feet, the Floor was made of cement-sand mixture is with the type. At the ends of the pipeline 10 has installed cameras. On the left reel is wound sleeve 3 ⌀480 mm, made according to figure 2. On the right reel 2 wound around the sleeve 3 in diameter ⌀500 mm Right sleeve 3 by means of compressed air has moved into the left end of the pipe 10. After that, the system 6 filed in camera cement-sand mixture. Right sleeve 3 out of the pipeline 10. After the mixture was fed into the pipeline 10, the left sleeve 3 has begun to enter into the pipeline 10, and the right sleeve 3 out of the pipeline 10. Compressed air pressure in the left chamber was 0.6 MPa, and the pressure in the right chamber was 0.5 MPa. Once both sleeves 3 have reached the right end of the pipe 10, the right camera 1 was dismantled. The left sleeve 3 any excess mixture is dispensed from the pipeline 10. The left sleeve 3 under the pressure of 0.6 MPa was kept for 28 hours before curing of the mixture.

After that, the left sleeve 3 were taken out of the pipeline 10 by rotation of the drum 2. Compressed air from the chamber 1 was released into the atmosphere. The left camera 1 dismantled from the pipe 10. Then on the ends of the pipe 10 mounted camera with sleeves 3 ⌀480 mm Right sleeve 3 is introduced to the left sleeve 3.

System 6 into the space between the arms 3 of the pumped portion of the mixture, the right sleeve 3 thus taken out of the pipeline 10. After submitting all of the mixture in the pipeline 10, it began to enter the left sleeve 10 p is a pressure of 0.6 MPa compressed air, and right sleeve 3 output from the pipeline 10. Compressed air pressure in the right chamber 1 was maintained to 0.5 MPa. Once both sleeves 3 have come to the right camera, it was dismantled.

The left sleeve 3 is dispensed from the pipeline 10 excess mixture.

After that, the left sleeve 3 has stood in the pipeline 10 to the curing mixture. Then the left sleeve 3 were taken out of the pipeline 10 and dismantled the left camera 1.

The pipeline was tested for strength and tightness.

From the wall of the pipe cut 4 sample size of 100·100 mm, which were located from each other at a distance of 75 meters

The samples were covered with a smooth layer of cement thickness of 10 mm pipe Surface was smooth.

Cement-sand mixture is a solution.

The solution can be made from a different composition.

The use of the invention allows to restore the pipeline 100-1500 mm, apply a coating thickness from 3 mm to 200 mm, to obtain a smooth surface whenever the thickness of the coating.

1. The way to restore the pipeline, including cleaning of the pipeline from deposits, the coating on the inner surface of the pipeline, characterized in that it is injected into the pipe with the opposite end of the flexible casing in the form of two sleeves, the ends of which are folded and secured around the perimeter of the pipe, the casing is inflated by the supply of t is chucago agent with formation of a cavity between the arms, last fill with a solution, and the solid coating is applied by rolling the pipe sleeve, between which move through the pipeline solution, the diameter of one of the sleeve is equal to the inner diameter of the pipeline, and the other to the inner diameter of the pipeline is coated.

2. Device for plugging and coating of the pipeline, including the camera with installed drive reversible reel mounted on the ends of the pipe, and the sleeve form the bent portions of the cavity, which communicates with the fluid supply system of the agent, while in one of the cells sleeve is made of a separate sleeve, interconnected, and the diameter of the sleeve/sleeve is less than the internal diameter of the coated pipe.

3. The device according to claim 2, characterized in that the sleeve is made from a sleeve made of elastic and inelastic materials, which are connected in series with each other.

4. The device according to claim 2, characterized in that the sleeve is made of elastic material, or it contains elements that prevent stretching of the sleeve.

5. The best way to clean the pipeline, including a move by pipeline cleaning mechanism, the formation of its periphery jets of fluid flow, the destruction of these jets sediments and removing sweat the lump of fluid from the pipeline destroyed sediments, characterized in that the fluid flow faltering hydraulic resistance, which hit the wall of the pipeline.

6. A device for cleaning the pipeline, made of a shaft on which the hub attached to them in a checkerboard pattern elastic petals, characterized in that between the hubs installed hydraulic resistance with the possibility of fluctuations relative to the shaft.



 

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