KR101861402B1 - A method for repairing sediment in closed conduit - Google Patents

Abstract

In the pipe rehabilitation method of the present invention, the pipe rehabilitation method of the present invention includes a step of spraying a dehydrating agent for descaling to the inner surface of the pipe; A step of crushing and cutting a scale attached to the internal cross-section of the pipe by using a scale removing device and collecting the scale; Drying the collected scale to measure the weight, and estimating a value obtained by dividing the measured weight by the inner dimension of the scale-removed pipe as the pipe corrosion thickness; A step of washing the inner surface of the pipe; A step of applying a wet type waterproof epoxy resin on the inner surface of the pipe in order to regenerate the pipe, and applying the wet waterproof type epoxy resin on the basis of the thickness of the applied paint on the basis of the thickness of the pipe erosion; Heat-curing the wet-type waterproof epoxy resin; A process of confirming quality; And a finishing process.

Description

Technical Field [0001] The present invention relates to a method of repairing a pipe,

The present invention relates to a pipe rehabilitation method using a rust and scale removal apparatus, more particularly, to a pipe rehabilitation method using a rust and scale removal apparatus, And the method of removing the inner lining of the cement mortar inside the water pipe and removing the paint inside the pipe of the water pipe, the paint spraying device and the pipe rehabilitation method using the same will be.

The ducts are collectively referred to as the "phase" or "drainage duct" embedded in the underground. Such a duct may cause a crack on the surface of the duct due to the subsidence or impact load caused by the passage of the vehicle, And a step is formed.

As a result, the tap water in the pipeline may leak out of the pipe due to the hydraulic pressure, resulting in long-term soil softening and, in severe cases, collapse of the upper ground.

Most of the existing small pipes (diameter less than 800m / m) are mostly ductile cast iron pipes, and the inside of the pipe is corroded and rust is generated. Large pipes (diameter of 800m / m or more) Disturbance as bottled water is caused by tap water which is corroded by internal corrosion.

On the other hand, in order to remove the mortar inside the cast iron duct and to remove the paint inside the coated steel pipe, the scraper method using the pull wire is used.

On the other hand, as a conventional repair method for repairing the inside of an underground pipe such as a sewage pipe or the like, there is a partial repair method for partially repairing cracks and leaking parts inside the buried pipe, and a full repair method for repairing the entire inside of the buried pipe .

In the partial repair method, the leakage and cracks in the buried pipe are preliminarily inspected in advance, the waterproofing operation is performed on the leaked portion, and the leaked glass fiber and epoxy resin are impregnated in the factory, And a glass fiber part repair method in which the resin is pressed to a cracked part is used. In the whole repair method, a reinforcement material is inserted into a buried pipe as a reversing and pulling method by using water pressure and air pressure and glass fiber and epoxy resin are leaked And a glass fiber full repair method in which the glass fiber is pressed on a cracked portion is used.

However, the repair method in the buried pipe has durability problems in that a large amount of equipment and manpower is injected into the pipe to cause an excessive construction cost, and the adhesive part is dropped due to the difference in the material properties of the glass fiber and the repair material of the existing water pipe , There is a difficulty in the construction of the curved portion of the buried pipe and the difficulty in the construction of the curved portion. In addition, the effective quality control is difficult due to the lifting of the leaking portion of the connection portion, and the work air and construction cost are increased. It is difficult to repair the inside of the buried pipe at a small area where the work space is narrow.

Especially, in the case of the water pipe, although the scrapping method using winch is used in the process of removing the mortar lining inside the existing pipe, it is difficult to completely complete the processing, and the subsequent lining method is also used The quality problem is coming

In the case of the coated steel pipe, the scraping method is in principle impossible to remove the existing shallow paint (epoxy, 0.3 m / m) inside the steel pipe. In the large pipe, manpower and several vehicles are put into the pipe Since the front and rear bodies are large and the front and rear bodies are not flexed flexibly, it is not easy to work on the inside of the buried pipe due to the change of the cross section and the bent portion, , Safety problems due to the input of manpower, and excessive construction period.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide a drilling apparatus, The present invention is to provide a pipeline pipe line rust and scale removal device, a paint spraying device, and a pipeline rehabilitation method that can remove the mortar lining of the inner cement mortar and remove the paint inside the pipe while rotating.

It is another object of the present invention to provide a supporting wheel for supporting both forward and backward, which is a separate support wheel of the supporting wheel. The supporting wheel of the supporting wheel is elongated and contracted in accordance with the diameter of the supporting wheel. A paint spraying device, and a pipeline rehabilitation method using the pipe rust and scale removal device.

Another object of the present invention is to provide a method of spraying a coating material by applying a constant pressure of a pump at a constant pressure of a pump during a spraying operation inside a pipe and applying a uniform pressure in a direction perpendicular to the inside of the pipe using a spraying device, A pipe spraying device, and a pipe rehabilitation method using the same.

To attain the above object, the present invention provides a pipe rehabilitation method comprising: a step of spraying a dehumidifying agent for descaling to the inner surface of a pipe; A step of crushing and cutting a scale attached to the internal cross-section of the pipe by using a scale removing device and collecting the scale; Drying the collected scale to measure the weight, and estimating a value obtained by dividing the measured weight by the inner dimension of the scale-removed pipe as the pipe corrosion thickness; A step of washing the inner surface of the pipe; A step of applying a wet type waterproof epoxy resin on the inner surface of the pipe in order to regenerate the pipe, and applying the wet waterproof type epoxy resin on the basis of the thickness of the applied paint on the basis of the thickness of the pipe erosion; Heat-curing the wet-type waterproof epoxy resin; A process of confirming quality; And a finishing process.
Wherein the descaling device includes a body and a front head coupled to the front end of the body and configured to remove scale while rotating along an inner surface of the tube while the cutting portion is compressed on the inner surface of the tube, And a cutting unit that is secondarily pressurized by the cutting base plate, wherein the head body further includes a protruding mold surrounding the head support, wherein the head support includes a head support, Wherein a first elastic spring and a second elastic spring are provided between the support and the cutting portion and the cutting edge is provided between the first elastic spring and the second elastic spring, And the secondary elastic spring is installed through the through hole formed in the upper part of the mold.
The vehicle body is composed of a front car body and a rear car body removably connected to each other by a connecting rod, and the front car body and the rear car body are elastically connected to each other by an elastic body provided inside the connecting frame.

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The pipeline rust and scale removal apparatus, paint spraying apparatus, and pipeline rehabilitation method using the same according to the present invention configured as described above have the following effects.

First, in a case where the excavating head includes a portion having irregularities partially on the inner surface of the pipe, and when removing the rugged rust having a small uneven step on the inner surface of the pipe for removing the rust on the rusty pipe, ), And when the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the outer diameter of the inner diameter of the outer diameter of the inner diameter of the outer diameter of the inner diameter of the outer diameter of the inner diameter,

Second, as the support wheel is stretched and contracted independently for each wheel, the front and rear wheels can change the inner surface of the pipe and pass through the bending part during the passage of the pipe diameter change (curved part).

Third, the front and rear wheels can be separated and combined by using the connecting rod. In particular, when the curved portion is passed, the front and rear wheels are coupled with the elastic spring alone, .

Fourth, the spraying work can be performed vertically on the inner surface of the pipe by automatically rotating the nozzle gun from the injection nozzle by the pressure of the pump during the painting operation.

Fifth, it is possible to work with a combination of self-propelled type and pull type from a small tube (diameter 800m / m or less) to a large tube (diameter 800m / m or more), remove rust and shallow film (epoxy paint) Cleaning work can be done at the same time.

Sixth, by using wet waterproof coating material (epoxy thickness 1.0m / m or less) on the wet surface of the existing phase and sewage pipe, it has excellent penetration, adhesion and waterproofing ability and is excellent in securing the passage section in the pipeline.

Particularly, the wet epoxy resin (penetration-proof resin) has excellent adhesion in the inner surface of the tube in the wetted state and can be cured even when water is supplied, so that excellent effects can be expected in ensuring workability and quality in a wet state.

Seventh, it is possible to prevent safety accidents through automatic unmanned automation system especially in a small pipe (diameter 800m / m or less), and it is possible to prevent a safety accident by thoroughly processing the internal section of the pipe and the pre- Superior quality control is expected by preprocessing work, and construction workability, economical efficiency, stability (quality), and pollution-free quality can be secured.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a pipe rust and scale removal apparatus according to the present invention; FIG.
FIG. 2 is a cross-sectional view showing a drilling head of a pipe rust and scale removal apparatus according to the present invention; FIG.
3 is an exploded view showing a drilling head of a pipe rust and scale removal apparatus according to the present invention;
4 is a sectional view showing a coating material injection apparatus according to the present invention;
5 is a sectional view of a nozzle gun rotating apparatus according to the present invention;
6 is a sectional view of the front and rear support wheels according to the present invention;
7 is a lining process diagram of the pipe rehabilitation method according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present embodiment, the same designations and the same reference numerals are used for the same components, and further description thereof will be omitted.

FIG. 1 is a cross-sectional view showing a pipe rust and scale removing apparatus according to the present invention, FIG. 2 is a cross-sectional view showing a drilling head of a pipe rust and scale removing apparatus according to the present invention, Fig. 6 is an exploded view showing the excavating head of the removing device.

As shown in the drawing, the pipe rust and scale removing apparatus of the present invention is connected to an external power source by a wire (W) or the like so that the front and rear support wheels (110) The front head 200 is coupled to the front end of the vehicle body 100 and the body 100 and removes rust and scale while rotating along the inner surface of the tube in a state where the cutting portion 210 is compressed on the inner surface of the tube.

The front head 200 includes a head body 220, a head support 230 coupled to the head body 220, a cutting pads 240 repressed primarily by the head support 230, And a cutting part 210 which is secondarily repressed by the second pressing part 240.

A primary elastic spring S1 is provided between the head support 230 and the cutting edge support plate 240 to pressurize the cutting part 210 for a second step and the support plate 240 and the cutting part 210, A second elastic spring S2 is provided between the first elastic spring S2 and the second elastic spring S2.

6, the vehicle body 100 includes a body body 120, a body support 130 coupled to the body 120, a wheel support 140 that is primarily repressed by the body support 130, And a support wheel 110 which is secondarily repressed by the support shaft 140.

A primary elastic spring S3 is installed between the vehicle body support 130 and the wheel support plate 140 to pressurize the support wheel 110 for a two-stage reaction, and the wheel support plate 140 and the support wheel 110, A secondary elastic spring S4 is provided between the first elastic spring S4 and the second elastic spring S4.

More specifically, the vehicle body 120 includes a prototype mold 131 which surrounds the vehicle body support 130, and a through hole is formed in an upper portion of the prototype mold 131. A primary elastic spring S3 and a secondary elastic spring S4 are installed between the vehicle body support 130 and the wheel 110. The primary elastic spring S3 and the secondary elastic spring S4 And the wheel support plate 140 is disposed in an upper space inside the prototype mold 131 and the secondary elastic spring S4 is disposed in the through hole 131 of the prototype mold 131, As shown in FIG.

The vehicle body 100 includes a front vehicle body 300 and a rear vehicle body 400 detachably connected to each other by a connecting rod 250. The front vehicle body 300 and the rear vehicle body 400 are connected to each other by a connecting rod 250 are elastically connected to each other by an elastic body 251 provided inside.

1, a rotation motor 112, a gear 113 and a shaft coupling gear 114 are rotated by a motor to rotate the shaft coupling gear 114 (see FIG. 1) to a gear box 111 installed on the front support wheel 110, And the rotating head 120 and the cutting portion 210 are rotated at a high speed in a state where the bearing and the rotating pipe 116 are fastened together with the bolts B so that the rust and scale of the inner surface of the pipe can be easily removed have.

A plurality of supports radially support the respective cutting portions 210 on the inner circumferential surface of the cutter 210 of the front head 200. The height adjuster head support 230 is mounted on the inner surface of the cutter 210, It can be applied to various diameters by exchanging the length of the pipe.

Specifically, the secondary resilient spring S2 built in the upper part of the cutting edge plate 240 secondarily resiliently presses the cutting part 210 in the direction of the cutting part 210, The bolts 124 of the upper fixing frame are tightened and loosened with the screws provided on the lower portion of the cut circular L-shaped pedestal 211 and the primary elastic spring S10 (the piston portion) The first and second elastic springs S1 and S2 press the cut portion 210 twice and extend and contract (action of the small diameter adjuster) by changing the cut L-shaped pedestal horizontally and obliquely.

As shown in FIG. 3, the head body 220 is provided with a prototype mold 231 which surrounds the head supporter 230, and a through hole 242 is formed in an upper portion of the prototype mold 231. A primary elastic spring S1 and a secondary elastic spring S2 are provided between the head support 230 and the cutting part 210. The primary elastic spring S1 and the secondary elastic spring S2 are disposed between the head support 230 and the cutting part 210, The cutting edge plate 240 is located in the upper space of the mold 231 and the secondary elastic spring S2 is located in the upper edge of the mold 231, Through holes (242) of the main body.

On the other hand, in the section change period, the diameter changes to the maximum and minimum cross section by the first and second expansion and contraction actions of the cut section 210, and the front cross section rust and scale can be removed while passing through the curved section.

In addition, it is preferable that the cutter blade 213 and the steel brush be replaced with bolts by fixing with a cut circular first support bar anti-rotation key 212.

5 is a cross-sectional view of a nozzle gun rotating apparatus according to the present invention, and FIG. 6 is a cross-sectional view of a front and rear support wheels according to the present invention.

4, the nozzle gun 301 is fixed to the center of the front surface of the injector, the nozzle tip 310 of FIG. 5 is installed at the center of the front surface of the nozzle gun 301, 410 are installed.

At this time, the regeneration paint is sprayed on the left and right sides of the injection port with high pressure to the center hole H on the front surface of the nozzle tip 310 by the pump pressure and the rotation cap 410 is moved in one direction The coating material for regeneration is applied perpendicularly to the inner circumferential surface of the tube.

On the other hand, the separate rotary motor is omitted.

In Fig. 4, the support for supporting the wheel is similar to the support of the cutting portion of Fig. 2, and a rolling wheel is installed instead of the cut at the upper part, and the forward and backward movement is possible.

It is preferable that the cutter 210 of the cutting unit 210 be replaced with a cutter blade.

In the drawing, reference numerals not shown are upper fixing bolt 124, ejection passage 401, injection port F, and bearing (B).

7, a moisture absorbent is sprayed on the inner surface of the pipe, and the inner surface of the pipe is sprayed with water to remove scales and rust easily. As shown in FIG. 7, (S100).

Then, after the wettable powder is sprayed, the rust and scale are crushed by using a rust and scale removing device (S200), and then the crushed rust and scale are collected to the outside of the channel. According to the rust and scale removing apparatus of the present invention, the centrifugal force generated by the rotation of the head body 220 and the centrifugal force generated by the cutting unit 210 are applied to the rust and scale removing apparatus of the present invention, The cutter blade 213 keeps close contact with the inner surface of the pipe even though the inner surface of the pipe is bent, so that the rust and scale can be crushed and cut to be precisely cut.

The value of (T1) is the thickness of the channel corrosion (T2), and the value of (T1) is the thickness of the channel corrosion. (S300) (T1 = T2).

Next, after the process of collecting the rust and scale, a process of cleaning the inner surface of the pipe (S400) is performed.
In order to regenerate the pipe, a wet type waterproof epoxy resin is applied to the inner surface of the pipe. The thickness (Y) of the wet type waterproof type epoxy resin is calculated and uniformly applied with the pipe wall corrosion thickness (T2) estimated above (S500) . Here, as a method for calculating the coating thickness (Y) of the wet waterproof epoxy resin, it is preferable to determine the thickness of the pipe corrosion thickness as the default value (X), and to determine the coating thickness in proportion to the pipe corrosion thickness value in consideration of the corrosion state inside the pipe (Y = X + b, X = T2 = T1, b) is added to the pipe corrosion thickness value (Y = aX, X = T2 = T1 and a is a constant of 1 or more) A constant exceeding 0). Of course, we can use the equation (Y = aX + b) which combines the above two methods.
Next, a step of injecting hot air for epoxy resin curing is performed (S600) after coating the inner surface of the pipe with the wet penetration-proof epoxy equivalent.

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Finally, the resin is checked by the CCTV inspection or the visual inspection in the step S700 for checking the quality state after the thermosetting process, and the rehabilitation work is terminated (S800).

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or scope of the invention as defined in the appended claims. It is self-evident to those who have.

Therefore, the above-described embodiments are to be considered as illustrative rather than restrictive, and the present invention is not limited to the above description, but may be modified within the scope of the appended claims and equivalents thereof.
For reference, 'scale' in the claims refers to 'rust and scale' or 'rust or scale sandwiched in a channel.'

100: body 110: support wheel
120: Body body 130: Body body support
131: a mold frame 140: a wheel support plate
200: front head 210:
220: head body 230: head support
231: prototype 240: cutting plate fingerboard
250: connecting rod 251: elastic body
300: front body 400: rear body
301: nozzle gun 410: rotating cap

Claims (10)

delete delete delete delete delete delete delete In the pipe rehabilitation method,
A step of spraying a scavenging moisture absorber on the inner surface of the channel;
A step of crushing and cutting a scale attached to the internal cross-section of the pipe by using a scale removing device and collecting the scale;
Drying the collected scale to measure the weight, and estimating a value obtained by dividing the measured weight by the inner dimension of the scale-removed pipe as the pipe corrosion thickness;
A step of washing the inner surface of the pipe;
A step of applying a wet type waterproof epoxy resin on the inner surface of the pipe in order to regenerate the pipe, and applying the wet waterproof type epoxy resin on the basis of the thickness of the applied paint on the basis of the thickness of the pipe erosion;
Heat-curing the wet-type waterproof epoxy resin;
A process of confirming quality; And
A piping rehabilitation method comprising a finishing process. 9. The method of claim 8,
Wherein the descaling apparatus includes a vehicle body and a front head coupled to the front end of the vehicle body and removing the scale while rotating along the inner surface of the tube while the cutting portion is compressed on the inner surface of the tube,
The front head includes a head main body, a head support member coupled to the head main body, a cutting support base plate which is firstly repressed by the head support member, and a cutting portion which is secondarily repressed by the cutting support base plate,
The head main body further includes a prototype mold surrounding the head support,
Wherein the cutting support base plate is provided between the head support and the cutting portion, and a primary elastic spring and a secondary elastic spring are provided between the head support and the cutting portion, and the cutting base plate is provided between the primary elastic spring and the secondary elastic spring, And the secondary elastic spring is installed through the through hole formed in the upper part of the prototype mold. 10. The method of claim 9,
Wherein the vehicle body comprises a front body and a rear body which are detachably connected to each other by a connecting rod, and the front body and the rear body are elastically connected by an elastic body provided inside the connecting rod.

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