KR102667471B1 - Equipment for rehabilitating superannuated pipes - Google Patents

Abstract

The present invention relates to a coating film removal equipment for pipe rehabilitation with improved scraping ability, comprising: a first body (100) having a first roller (110) that is in close contact with one inner side of the pipe (P) and moves in a rolling motion; A first roller driving unit 200 mounted on the first body 100 to rotate the first roller 110; A second body 300 having a second roller 310 that is in close contact with the other inner side of the pipe P and moves in a rolling motion; a second roller driving unit 400 mounted on the second body 300 to rotate the second roller 310; Connecting the first body 100 and the second body 300 while spaced apart, the linear connection part 500 includes a first damping cylinder 510 fixed to the first body 100, and The second damping cylinder 520 is fixed to the second body 300, and the first and second damping cylinders 510 and 520 are connected by connecting the first damping cylinder 510 and the second damping cylinder 520. A linear connection portion 500 including an intermediate rod 530 protruding inward; And a coating film peeling unit 600 installed on the first body 100 and having a scraper 630 for scraping and peeling off the aged coating film (F) on the inner peripheral surface of the pipe (P).

Description

Film removal equipment for pipe rehabilitation with improved scraping ability {Equipment for rehabilitating superannuated pipes}

The present invention relates to film removal equipment for pipe rehabilitation, and more specifically, to film removal equipment for pipe rehabilitation with improved scraping ability, which can effectively remove the film within the pipe before the painting process for rehabilitation of old pipes. will be.

In general, large pipes such as water pipes are made of cast iron pipes or steel pipes, and a coating film is formed on the inner circumferential surface of the pipe to prevent corrosion by flowing fluid. After these pipes are buried, peeling of the internal coating film progresses due to changes in temperature and pressure, and once peeling progresses, peeling is further accelerated by resistance due to the flow of fluid, and corrosion due to oxidation occurs thereafter. In addition, over a long period of time, a scale layer is formed on the paint film, resulting in deterioration of water quality.

To solve this problem, the old coating film and corroded surface must first be removed from the inner peripheral surface of the pipe, and then a new coating film must be formed.

For this purpose, blasting equipment is first introduced into the pipe, and while moving through the pipe, a large number of fine shot balls are sprayed on the inner circumference of the pipe to remove old coatings and corroded surfaces. Then, while moving through the pipe, the shot balls that have fallen to the floor are blasted again. It was recovered and reused to remove the coating film and corrosion surfaces.

However, since the shot ball is fired by compressed air, a large amount of dust is generated during the process of removing the coating film and corroded surface, and the shot ball that falls on the floor is mixed with dust, so the dust and shot must be removed for recycling of the shot ball. A separate process was required to separate the balls, so it took a lot of time and effort to perform the blasting process.

In addition, a lot of dust is generated during the blasting process, which is very harmful to workers, so there was a problem that separate dust collection equipment had to be excessively operated to collect dust.

The present invention was created to solve the above problems, and its purpose is to provide paint film removal equipment for pipe rehabilitation with improved scraping ability, which can quickly remove old paint films and maximize paint film removal efficiency.

Another object of the present invention is to provide paint film removal equipment for pipe rehabilitation with improved scraping ability, which can effectively remove old paint films even from pipes with uneven inner diameters.

Another object of the present invention is to provide film removal equipment for pipe rehabilitation with improved scraping ability, which can minimize the operation of the dust collection device by minimizing the generation of dust during the removal process of the old film.

In order to achieve the above object, the film removal equipment for pipe rehabilitation with improved scraping ability according to the present invention includes a first body (110) having a first roller 110 that is in close contact with one inner side of the pipe (P) and rolls 100); A first roller driving unit 200 mounted on the first body 100 to rotate the first roller 110; A second body 300 having a second roller 310 that is in close contact with the other inner side of the pipe P and moves in a rolling motion; a second roller driving unit 400 mounted on the second body 300 to rotate the second roller 310; Connecting the first body 100 and the second body 300 while spaced apart, the linear connection part 500 includes a first damping cylinder 510 fixed to the first body 100, and The second damping cylinder 520 is fixed to the second body 300, and the first and second damping cylinders 510 and 520 are connected by connecting the first damping cylinder 510 and the second damping cylinder 520. A linear connection portion 500 including an intermediate rod 530 protruding inward; And a coating film peeling unit 600 installed on the first body 100 and having a scraper 630 for scraping and peeling off the aged coating film (F) on the inner peripheral surface of the pipe (P).

In the present invention, the coating film peeling unit 600 rotates on a pair of front support wings 610 installed on the first table 140 of the first body 100 and the front support wings 610. A rotation axis 620 possibly coupled to the axis. It is fixed to extend on the rotation axis 620 and is in close contact with the inner peripheral surface of the pipe (P), and includes the plurality of scrapers 630 for scraping and peeling off the aged coating film (F).

In the present invention, the coating film peeling unit 600 is supported on the rear support wing 640, which is installed on the rear side of the front support wing 610, and the rear support wing 640, and is connected to the pipe (P). It further includes a first tension application unit 650 that rotates the rotation shaft 620 clockwise or counterclockwise in order to vary the tension of the scraper 630 in close contact with the inner peripheral surface.

In the present invention, the first tension application part 650 includes a lever 651 protruding from the rotation axis 620, and a front rotatable support portion that is rotatably supported at an end of the lever 651 and penetrates the inside. In a state in which the rotation ball 652, the rear rotation ball 653, which is rotatably coupled to the rear support wing 640 and has a screw hole formed therein, and the front rotation ball 652 are loosely coupled to the It includes a bolt shaft 654 that is screwed into the screw hole of the rear rotating ball 653.

In the present invention, the first damping cylinder 510 is a first cylinder tube having an inlet and a first front nozzle 511a and a first rear nozzle 511b through which oil flows in and out on one side and the other side. (511), the first cylinder header 512 coupled to the inlet of the first cylinder pipe 511, and the first cylinder pipe between the first front nozzle 511a and the first rear nozzle 511b ( 511) and a first gas spring 513 that expands and contracts by the applied pressure, and a first cylinder tube 511 between the first gas spring 513 and the first front nozzle 511a. It includes a first front piston 514 and a first rear piston 515 built into the first cylinder tube 511 between the first gas spring 513 and the first rear nozzle 511b, 2 Damping cylinder 520 includes a second cylinder tube 521 having a second front nozzle (521a) and a second rear nozzle (521b) through which oil flows in and out on one side and the other side and an inlet, and the second cylinder pipe (521) having an inlet. It is approved as being built into the second cylinder header 522 coupled to the inlet of the second cylinder tube 521 and the second cylinder tube 521 between the second front nozzle 521a and the second rear nozzle 521b. A second gas spring 523 that expands and contracts due to pressure, and a second front piston 524 built into the second cylinder tube 521 between the second front nozzle 521a and the second gas spring 523. and a second rear piston 525 built into the second cylinder pipe 521 between the second gas spring 523 and the second rear nozzle 521b.

In the present invention, the intermediate rod 530 penetrates the first cylinder header 512 and is connected to the first front piston 514, and penetrates the second cylinder header 522 to form the second front piston. A rod body 531 coupled to (524), and a rod body 531 that penetrates the first front piston 514 from inside one side of the rod body 531 and communicates with the space on the side of the first gas spring 513 and external air. 1 air hole 532, and a second air hole 533 that penetrates the second front piston 524 inside the other side of the rod body 531 and communicates the space on the side of the second gas spring 523 with external air. ) includes.

According to the present invention, the first and second bodies 100 and 300 on which the first and second rollers 110 and 310 are installed are moved by the first and second damping cylinders 510 and 520 and the intermediate rod 530. Since it is expandable, it can be mounted on a bogie and moved along a narrow pipe (P) while the gap between the first and second bodies (100) and (300) is narrowed. Furthermore, because it is linear, it creates a space through which people can pass, thereby making workability easier.

Since the first and second gas springs (513) (523) are built into the first and second damping cylinders (510) (520), the film removal equipment of the present invention can rotate smoothly in the pipe (P) even if pipe deformation occurs. Accordingly, the aged coating film (F) can be completely peeled off and removed.

In addition, the first and second rollers 110 and 310 are tilted at a predetermined angle with respect to the first and second bases 120 and 320, so that according to the rotation direction of the first and second rollers 110 and 310, the present invention The film removal equipment can move forward or backward within the pipe (P).

In addition, by not using conventional short balls, the operation of the dust collection device can be minimized by minimizing the generation of dust during the process of removing the old paint film.

In addition, the coating film peeling unit 600 includes a pair of front support wings 610 installed on the first table 140, and a pivot shaft 620 rotatably coupled to the front support wings 610. A plurality of scrapers 630 that are extended and fixed to the rotation axis 620 and are in close contact with the inner peripheral surface of the pipe (P) for scraping and peeling off the aged coating film (F), and a rear scraper installed on the rear side of the front support wing 610. It includes a support wing 640 and a first tension application part 650 that is supported on the rear support wing 640 and rotates the rotation axis 620 clockwise or counterclockwise, and is in close contact with the inner peripheral surface of the pipe (P). By varying the tension of the scraper 630, the coating film P can be effectively scraped and removed, and at the same time, the scraping ability can be maximized by replacing the scraper 630 as needed.

In addition, the coating cutting unit 700 is disposed on the second table 340 of the second body 300, has a U-shaped cutter bracket 710 opened toward the front, and is rotatably installed on the cutter bracket 710. As a result, tension is applied to a plurality of cutting wheels 720 that cut the aged coating film (F) on the inner peripheral surface of the pipe (P) in the circumferential direction, and to the cutter bracket 710 so that the cutting wheels 720 are in close contact with the coating film (F). By including the second tension application portion 730, the coating film F can be cut in the circumferential direction while forming a small width, and accordingly, the scraper 630 of the coating film peeling unit 600 cuts the coating film F into a small width. (F) can be easily and completely removed by scraping.

Figure 1 is a view for explaining that the film removal equipment for pipe rehabilitation with improved scraping ability according to the present invention is installed in the pipe;
Figure 2 is a view of the film removal equipment for pipe rehabilitation of Figure 1 seen from the opposite side;
Figure 3 is a diagram illustrating the configuration of the first and second bodies and the first and second roller drives of Figure 1;
Figure 4 is a plan view of the first and second bodies and the first and second roller drives of Figure 3;
Figure 5 is a rear view of the first and second bodies and the first and second roller drives of Figure 3;
Figure 6 is a diagram for explaining the configuration of the first and second tilting variable parts for varying the tilting angles of the first and second rollers of Figure 3;
Figure 7 is a diagram for explaining changing the tilt angles of the first and second rollers by rotating the first and second stages of Figure 6;
Figure 8 is a diagram showing an excerpt of the linear connection of Figure 1;
Figure 9 is a cross-sectional view taken along line IX-IX of Figure 8;
Figure 10 is a view for explaining the disassembled configuration of the first and second damping cylinders and intermediate rods of Figure 9;
Figure 11 is a diagram for explaining that the distance between the first and second damping cylinders of Figure 9 is narrowed based on the intermediate load;
Figure 12 is a diagram for explaining the operation of the gas cylinder in Figure 11;
Figure 13 is a view showing an excerpt of the coating film peeling part of Figure 1;
Figure 14 is a plan view for explaining the film peeling portion of Figure 13;
Figure 15 is a cross-sectional view for explaining the internal configuration of the coating film peeling part of Figure 13;
Figure 16 is a view showing an excerpt of the film cutting part of Figure 1;
Figure 17 is a plan view for explaining the coating layer end portion of Figure 16;
Figure 18 is a cross-sectional view for explaining the internal configuration of the film cutting part of Figure 16;
Figure 19 is a cross-sectional view for explaining the operation of the film cutting unit of Figure 18;
Figure 20 is a view for explaining that the film removal equipment of Figure 1 is rotated within the pipe.

Hereinafter, the film removal equipment for pipe rehabilitation according to the present invention will be described in detail with reference to the attached drawings.

In the following examples, singular terms include plural terms unless the context clearly dictates otherwise. In the following embodiments, terms such as include or have mean the presence of features or components described in the specification, and do not exclude in advance the possibility of adding one or more other features or components. In the following embodiments, when a part of a film, region, component, etc. is said to be on or on another part, it is not only the case where it is directly on top of the other part, but also when another film, region, component, etc. is interposed between them. Also includes cases where there are. In the drawings, the sizes of components may be exaggerated or reduced for convenience of explanation. For example, the size and thickness of each component shown in the drawings are shown arbitrarily for convenience of explanation, so the present invention is not necessarily limited to what is shown. In cases where an embodiment can be implemented differently, a specific process sequence may be performed differently from the described sequence. For example, two processes described in succession may be performed substantially at the same time, or may be performed in an order opposite to that in which they are described.

Figure 1 is a view to explain that the film removal equipment for pipe rehabilitation with improved scraping ability according to the present invention is installed in the pipeline, Figure 2 is a view of the film removal equipment for pipe rehabilitation of Figure 1 seen from the opposite side, and Figure 20 is This is a diagram to explain that the film removal equipment in Figure 1 is rotated within the pipe.

As shown, the film removal equipment for pipe rehabilitation includes a first body 100 having a first roller 110 that is in close contact with one inner side of the pipe P and moves in a rolling motion; a first roller driving unit 200 mounted on the first body 100 to rotate the first roller 110; a second body 300 having a second roller 310 that is in close contact with the other inner side of the pipe P and moves in a rolling motion; a second roller driving unit 400 mounted on the second body 300 to rotate the second roller 310; A linear connection part 500 connecting the first body 100 and the second body 300 while spaced apart from each other; A coating film peeling unit 600 installed on the first body 100 and having a scraper 630 for scraping and peeling off the aged coating film (F) on the inner peripheral surface of the pipe (P);

A coating film cutting unit 700 installed in the second body 300 and having a cutting wheel 720 for cutting the aged coating film (F) on the inner peripheral surface of the pipe (P) in the circumferential direction; It is rotatably supported on one of the first and second bodies 100 and 300, and when the first and second bodies 100 and 300 are rotated inside the pipe P, they are rotated in the opposite direction and the first and second bodies 100 and 300 are rotatably supported. It includes a swivel 800 that supplies power to the roller drive units 200 and 400.

The first body 100 and the second body 300 are connected in a linear form by a linear connection part 500, the first roller 110 is in close contact with one side of the inner circumference of the pipe (P) and makes a rolling movement, and the second roller As (310) is in close contact with the other side of the inner peripheral surface of the pipe (P) and rolls, the film removal equipment of the present invention can be rotated inside the pipe (P), as shown in Figure 20.

The swivel 800 is axially coupled to one of the first and second bodies 100 and 300, and in this embodiment, to the side frame 810 extending from the second body 300 and is located in the center of the pipe (P). As a result, a weight (not shown) facing the direction of gravity is built in to always maintain the initial angle by rotating in the opposite direction while the film removal equipment of the present invention is rotated within the pipe (P). On the front side of the swivel (800) An external power line (not shown) is connected, and a power line that supplies power to the first and second roller driving units 200 and 400 is connected to the rear side. The swivel 800 maintains the initial position even while the film removal equipment is rotated within the pipe (P), thereby preventing the power line from being twisted and stably supplying power to the first and second roller drives (200) and (400). Let it happen. Since this swivel 800 is a technology commonly used in industrial fields, further detailed description is omitted.

Figure 3 is a drawing for explaining the configuration of the first and second bodies and the first and second roller driving parts of Figure 1, and Figure 4 is a plan view of the first and second bodies and the first and second roller driving parts of Figure 3. , Figure 5 is a rear view of the first and second bodies and the first and second roller drives of Figure 3.

As shown in FIG. 3, the first body 100 includes a first base 120 supporting one side of the linear connection 500, and a first roller 110 in a rolling motion on the first base 120. It includes a first roller support part 130 that supports the first roller support part 130, and a first table 140 that is installed on the first base 120 on the opposite side of the first roller support part 130 and supports the coating film peeling part 600.

The first roller 110 is in close contact with the inner circumferential surface of the pipe (P) and rolls, and the outer circumferential surface has a first elastic layer 111 to absorb irregular shocks applied through the aged coating film (F) during the rolling motion. This is formed.

As shown in FIG. 4, the first roller support portion 130 includes a first stage 131 installed on the upper surface of the first base 120, and a first stage 131 installed in front of the first stage 131. It includes a first bearing bracket 132 that rotatably supports the first rotation shaft 112 of the roller 110.

A first geared motor 210 and a first idler 250 constituting the first roller drive unit 200 are installed in the first stage 131.

In the first rotation axis 112 of the first roller 110, the normal line (V) formed in a right angle direction from the side of the first rotation axis 112 is the first line (V) based on the horizontal line (H) of the first body 100. The angle θ1 is tilted at 2 to 3 degrees in this embodiment. Accordingly, the first roller 110 coupled to the first rotation axis 112 is rotated in a tilted state with respect to the first body 100.

The first table 140 is installed on the back of the first base 120 and supports the film peeling portion 600, which will be described later.

As shown in FIG. 3, the first roller drive unit 200 is connected to a first geared motor 210 that is supported on the first stage 131 and provides rotational driving force, and a rotation axis of the first geared motor 210. The first motor sprocket 220 is coupled to the first roller sprocket 230 coupled to the first rotation axis 112 of the first roller 110, and the first motor sprocket 220 and the first roller sprocket 230 are coupled to each other. ) and a first idler 250 that is supported on the first stage 131 and presses the side of the first chain 240 to maintain appropriate tension.

The first idler 250 applies tension so that the first chain 240 can always remain taut regardless of its position.

When the film removal equipment of the present invention is positioned in the horizontal direction while rotating within the pipe (P), the first chain 240 is stretched between the first motor sprocket 220 and the first roller sprocket 230 by its own weight. As it moves, it can maintain a state of being firmly engaged with the first motor sprocket 220 and the first roller sprocket 230, and thus the rotational driving force of the first geared motor 210 can be perfectly transmitted.

However, when the film removal equipment is positioned in the vertical direction, the first motor sprocket 220 and the first roller sprocket 230 are positioned at the top and bottom, for example, when the first motor sprocket 220 is positioned at the top. As the lower side of the first chain 240 is stretched, it is not firmly engaged with the first roller rocket 230, and in this case, the rotational driving force of the first geared motor 210 is not perfectly transmitted. It is possible to escape from the first roller roller kit 230.

In the present invention, the first idler 250 is employed to pressurize the first chain 240 to always maintain tension, and thus the first motor sprocket 220 and the first roller are maintained regardless of the rotational position of the film removal equipment. The rotational driving force can be perfectly transmitted between the sprockets 230.

As shown in FIG. 3, the second body 300 includes a second base 320 that supports the other side of the linear connector 500, and a second roller 310 in a rolling motion on the second base 320. It includes a second roller support part 330 that supports the second roller support part 330, and a second table 340 that is installed on the second base 320 on the opposite side of the second roller support part 330 and supports the coating cutting part 700.

The second roller 310 is in close contact with the inner circumferential surface of the pipe (P) and rolls, and the outer circumferential surface has a second elastic layer 311 to absorb irregular shocks applied through the aged coating film (F) during the rolling motion. This is formed.

As shown in FIG. 4, the second roller support portion 330 is installed on the second stage 331 installed on the upper surface of the second base 320 and in front of the second stage 331 to support the second stage 331. It includes a second bearing bracket 332 that rotatably supports the second rotation shaft 312 of the roller 310.

A second geared motor 410 and a second idler 450 constituting the second roller drive unit 400 are installed in the second stage 331.

In the second rotation axis 312 of the second roller 310, the normal line V formed in a right angle direction from the side of the second rotation axis 312 is the second axis with respect to the horizontal line H of the second body 300. The angle θ2, in this embodiment, is tilted at 2 to 3°, and accordingly, the second roller 310 coupled to the second rotation axis 312 is rotated in a tilted state with respect to the second body 300. .

In this embodiment, for ease of explanation, the first rotation axis 112 of the first roller 110 is illustrated as tilted at the first angle θ1 and the second angle θ2, but the first angle θ1 And the second angle θ2 may of course be the same.

The second table 340 is installed on the back of the second base 320 and supports each of the film cutting parts 700, which will be described later.

As shown in FIG. 3, the second roller drive unit 400 is supported on the second stage 331 and is connected to the second geared motor 410, which provides rotational driving force, and the rotation axis of the second geared motor 410. The second motor sprocket 420 is coupled to the second roller sprocket 430 coupled to the second rotation axis 312 of the second roller 310, and the second motor sprocket 420 and the second roller sprocket 430 are coupled to each other. ) and a second idler 450 that is supported on the second stage 331 and presses the side of the second chain 440 to maintain appropriate tension.

The second idler 450 applies tension so that the second chain 440 can always remain taut regardless of its position. Since this second idler 450 is substantially similar to the operation set in the first idler 250, further detailed description will be omitted.

Figure 6 is a diagram for explaining the configuration of the first and second tilting variable parts for varying the tilting angles of the first and second rollers in Figure 3, and Figure 7 shows the first and second stages by rotating the first and second stages in Figure 6. This is a diagram to explain changing the tilting angle of the two rollers.

The first body 100 further includes a first tilting variable part 150 that changes the tilting angle of the first roller support part 130 with respect to the first base 120. This first tilting variable portion 150 includes a first shaft coupling portion 151 that axially couples one side of the first stage 131 to the first base 120, and a first shaft coupling portion 151 opposite the first shaft coupling portion 151. The first protrusion 152 is formed to protrude from the first stage 131, and the first protrusion 152 is installed on the first base 120 and rotates in the left and right directions based on the first shaft coupling portion 151. The first protrusion rotating part 153 is formed on the first protrusion rotating part 153, the first automatic operating part 154 automatically operates the first protruding rotating part 153, and the first stage 131, and the first shaft coupling part 151 is formed on the first stage 131. Even while the first stage 131 is tilted by being screwed to the first base 120 through the first circumferential groove 155, which is formed with the same radius based on ), and the first circumferential groove 155, It includes a first washer bolt 156 that maintains firm contact with the first base 120.

The first protrusion rotating portion 153 is connected to a pair of first support shafts 153a installed on the first base 120 on the opposite side of the first shaft coupling portion 151 and a pair of first support shafts 153a. The first ball screw (153b) is pivotably coupled, the first long hole (153c) formed in the first protrusion 152, and is screwed to the first ball screw (153b) to form the first long hole (153c). It includes a first ball (153d) that is movably coupled along one long hole (153c).

The first automatic operation unit 154 includes a first geared motor 154a installed on the first substage 131a extending from the first stage 131, a rotation axis of the first geared motor 154a, and a first ball. It includes a first connector (154b) connecting the screw (153b).

The second body 300 further includes a second tilting variable part 350 that changes the tilting angle of the second roller support part 330 with respect to the second base 320. This second tilting variable portion 350 includes a second shaft coupling portion 351 that axially couples one side of the second stage 331 to the second base 320, and a second shaft coupling portion 351 opposite the second shaft coupling portion 351. The second protrusion 352 is formed to protrude from the second stage 331, and the second protrusion 352 is installed on the second base 320 and rotates in the left and right directions based on the second shaft coupling portion 351. The second protrusion rotating portion 353 is formed on the second protruding portion 353, the second automatic operating portion 354 automatically operates the second protruding rotating portion 353, and the second stage 331, and the second shaft engaging portion 351 Even while the second stage 331 is tilted by being screwed to the second base 320 through the second circumferential groove 355, which is formed with the same radius based on ), and the second circumferential groove 355, It includes a second washer bolt 356 that maintains firm contact with the second base 320.

The second protruding rotating portion 353 is connected to a pair of second support shafts 353a installed on the second base 320 on the opposite side of the second shaft coupling portion 351 and a pair of second support shafts 353a. The second ball screw (353b) is pivotably coupled, the second long hole (353c) formed in the second protrusion 352, and is screwed to the second ball screw (353b) to form the second long hole (353c). It includes a second ball (353d) that is movably coupled along the two long holes (353c).

The second automatic operation unit 354 includes a first geared motor 154a installed on the second substage 331a extending from the second stage 331, a rotation axis of the first geared motor 154a, and a second ball. It includes a first connector (154b) connecting the screw (353b).

The first tilt variable portion 150 and the second tilt variable portion 350 have substantially the same configuration.

FIG. 8 is a drawing showing an excerpt of the linear connection part of FIG. 1, FIG. 9 is a cross-sectional view taken along line IX-IX of FIG. 8, and FIG. 10 is an exploded configuration of the first and second damping cylinders and intermediate rods of FIG. 9. is a drawing for explaining, and FIG. 11 is a drawing for explaining that the space between the first and second damping cylinders in FIG. 9 is narrowed based on the intermediate load, and FIG. 12 is a drawing for explaining the operation of the gas cylinder in FIG. 11. It is a drawing.

The linear connection portion 500 includes a first damping cylinder 510 fixed to the first body 100, a second damping cylinder 520 fixed to the second body 300, and a first damping cylinder 510. It includes an intermediate rod 530 that protrudes inside the first and second damping cylinders 510 and 520 while connecting the second damping cylinder 520.

As shown in FIG. 9, the first damping cylinder 510 has a first front nozzle 511a and a first rear nozzle 511b through which oil flows in and out on one side and the other side, and an inlet. The first cylinder header 512 coupled to the inlet of the cylinder tube 511 and the first cylinder tube 511, and the first cylinder tube between the first front nozzle 511a and the first rear nozzle 511b ( 511) and a first gas spring 513 that expands and contracts by the applied pressure, and a first cylinder tube 511 between the first gas spring 513 and the first front nozzle 511a. It includes a front piston 514 and a first rear piston 515 built into the first cylinder tube 511 between the first gas spring 513 and the first rear nozzle 511b.

As the first cylinder tube 511 is fixed to the first base 120, the first damping cylinder 510 is fixed to the first body 100.

The first gas spring 513 is disposed between the first front piston 541 and the first rear piston 515. This first gas spring 513 includes a cylindrical first spring body 513a with compressed gas built in, a first spring rod 513b protruding from the first spring body 513a, and a first spring rod 513b. When pressure is applied to the spring rod (513b), the first spring rod (513b) is immersed in the first spring body (513a), and when the applied pressure is released, the first spring rod (513b) is immersed in the first spring body (513a). ) protrudes from.

The first front piston 514 and the first rear piston 515 are located between the first front nozzle 511a and the first rear nozzle 511b. Accordingly, when oil flows in and out of the first front nozzle 511a and the first rear nozzle 511b, the first front piston 514, the first rear nozzle 515, and the first front and rear pistons 514 The first gas spring 513 between 515 moves forward or backward once.

O-rings are installed on the outer peripheral surfaces of the first front piston 514 and the first rear piston 515 to completely seal the oil flowing into the first front nozzle 511a and the first rear nozzle 511b.

As shown in FIG. 9, the second damping cylinder 520 is a second front nozzle 521a and a second rear nozzle 521b through which oil flows in and out on one side and the other side, and a second inlet. A second cylinder header 522 coupled to the cylinder tube 521 and the inlet of the second cylinder tube 521, and a second cylinder tube between the second front nozzle 521a and the second rear nozzle 521b ( 521) and a second gas spring 523 that expands and contracts by the applied pressure, and a second cylinder tube 521 between the second front nozzle 521a and the second gas spring 523. It includes a second front piston 524 and a second rear piston 525 built into the second cylinder tube 521 between the second gas spring 523 and the second rear nozzle 521b.

As the second cylinder tube 521 is fixed to the second base 320, the second damping cylinder 520 is fixed to the second body 300.

The second gas spring 523 is disposed between the second front piston 524 and the second rear piston 525. This second gas spring 523 includes a cylindrical second spring body 523a with compressed gas built in, a second spring rod 523b protruding from the second spring body 523a, and a second spring rod 523b. When pressure is applied to the spring rod (523b), the second spring rod (523b) is immersed in the second spring body (523a), and when the applied pressure is released, the second spring rod (523b) is immersed in the second spring body (523a). ) protrudes from.

The second front piston 524 and the second rear piston 525 are located between the second front nozzle 521a and the second rear nozzle 521b. Accordingly, when oil flows in and out of the second front nozzle 521a and the second rear nozzle 521b, the second front piston 524, the second rear nozzle 525, and the second front and rear pistons 524 The second gas spring 523 between 525 moves forward or backward once.

O-rings are installed on the outer peripheral surfaces of the second front piston 524 and the second rear piston 525 to completely seal the oil flowing into the second front nozzle 521a and the second rear nozzle 521b.

The first and second gas springs (513) (523) are filled with nitrogen gas, and the first and second spring rods (513b) (523b) have a stroke of 8 cm and are located within the first and second spring bodies (513a) (523a). It is possible to appear in

The intermediate rod 530 is connected to the first front piston 514 through the first cylinder header 512, and is a rod body ( 531), and a first air hole 532 that penetrates the first front piston 514 inside one side of the rod body 531 and communicates with the space on the side of the first gas spring 513 and the outside air, and the rod body 531 ) includes a second air hole 533 that penetrates the second front piston 524 inside the other side and communicates the space on the side of the second gas spring 523 with the outside air.

The inlet 532a of the first air hole 532 is formed in the first front piston 514, and the outlet 532b is formed in the center of the rod body 531.

The inlet 533a of the second air hole 533 is formed in the second front piston 524, and the outlet 532b is formed in the center of the rod body 531.

In this embodiment, for ease of explanation, the first air hole 532 and the second air hole 533 are described separately, but of course they can be implemented as a single configuration. In this case, the outlets 532b and 533b consists of one composition.

By this linear connection 500, oil is injected into the first front nozzle 511a or the first rear nozzle 511b, thereby connecting the first front piston 514 and the first rear piston 514 to the first cylinder 511. ) can be moved forward and backward at the same time, and by injecting oil into the second front nozzle (521a) or the second rear nozzle (521b), the second front piston (524) and the second rear piston (524) are connected to the second cylinder ( 521) can be moved forward and backward at the same time, and accordingly, the intermediate rod 530 appears inside the first damping cylinder 510 and the second damping cylinder 520 between the first and second bodies 100 and 300. The gap becomes narrower or farther away.

At this time, depending on the amount of oil flowing in and out of the first and second front nozzles (511a) (521a) and the first and second rear nozzles (511b) (521b), the first and second bodies (100) are connected to each other based on the intermediate rod (530). The length between (300) can be varied, and accordingly, the film removal equipment of the present invention can be used even when the direct hit of the pipe (P) is large or small.

In this way, as shown in FIG. 11, when the gap between the first and second bodies 100 and 300 is narrowed by the first and second damping cylinders 510 and 520 and the intermediate rod 530, the main The film removal equipment of the invention can be easily moved along the pipe (P) by placing it on a cart (not shown) that flows into the pipe (P). And when the gap between the first and second bodies 100 and 300 increases, the first and second rollers 110 and 310 come into close contact with the inner peripheral surface of the pipe (P).

On the other hand, when the diameter of the pipe (P) is partially flattened or the inner peripheral surface is partially protruded, when the film removal equipment of the present invention is rotated, as shown in FIG. 13, the first and second front pistons ( 514) (524) is immersed in the first and second cylinder pipes (511) (521) and pressurizes the first and second gas springs (513) (523) supported by the first and second rear pistons (515) (525). And, accordingly, the first and second spring rods (513b) (523b) are immersed into the first and second spring bodies (513a) (523a) so that the film removal equipment can be rotated. At this time, the air existing in the space on the side of the first and second gas pistons (513) (523) is discharged or introduced into the first and second air holes (532) (533), and thus the first and second gas springs (513) ) The compression operation of 513 may proceed repeatedly.

FIG. 13 is a drawing showing an excerpt of the coating film peeling part of FIG. 1, FIG. 14 is a plan view for explaining the coating film peeling part of FIG. 13, and FIG. 15 is a cross-sectional view for explaining the internal configuration of the coating film peeling part of FIG. 13.

The coating film peeling unit 600 includes a pair of front support wings 610 installed on the first table 140 of the first body 100, and a rotation axis rotatably coupled to the front support wings 610. 620) and. It is fixed to extend on the rotation axis 620 and is in close contact with the inner peripheral surface of the pipe (P), and is installed on the rear side of the plurality of scrapers 630 for scraping and peeling off the aged coating film (F) and the front support wing 610. A device that rotates the rotating shaft 620 clockwise or counterclockwise to change the tension of the rear support wing 640 and the scraper 630 supported by the rear support wing 640 and in close contact with the inner peripheral surface of the pipe (P). 1Includes a tension application unit 650.

The rotation axis 620 is rotatably supported on the front support wing 610 and supports the scraper 630 to protrude. At this time, the scraper 630 is detachable from the rotating shaft 620 using bolts and nuts, and accordingly, when the scraper 630 is worn, it can be replaced with another scraper.

As shown in FIG. 14, a plurality of scrapers 630 are installed on the rotation axis 620, and in this embodiment, three scrapers are installed. The scraper 630 is implemented by cutting a spring steel plate with high elasticity into a scrap shape and then bending it, and includes a fixed plate 631 fixed to the rotating shaft 620 and bent from the fixed plate 631 to the inner peripheral surface of the pipeline (P). It consists of a knife plate 622 that is in close contact. This fixing plate 631 elastically supports the knife plate 622, and the lower end is detachably fixed to the rotation axis 620 with bolts and nuts.

The first tension application unit 650 includes a lever 651 protruding from the rotation axis 620, a front rotating ball 652 rotatably supported at the end of the lever 651 and penetrating the inside, and a rear rotating ball 652. The rear rotating ball 653, which is rotatably coupled to the support wing 640 and has a screw hole formed therein, is screwed into the screw hole of the rear rotating ball 653 while being loosely coupled to the front rotating ball 652. It includes a coupled bolt shaft 654 and a handle 655 formed at the end of the bolt shaft 654 to rotate the bolt shaft 654 forward and backward.

The bolt shaft 654 is fixed to the front rotating ball 652 and screwed to the rear rotating ball 653, and accordingly, when the bolt shaft 654 is rotated, it rotates based on the rear rotating ball 653. Accordingly, the front rotating ball 652 moves forward and backward.

By this first tension application unit 650, as shown in FIG. 15, when the handle 655 is rotated, the front rotating ball 652 is rotated based on the rear rotating ball 653 by the bolt shaft 654. It moves forward or backward, and when the front rotating ball 652 moves forward, the scraper 630 is in close contact with the inner peripheral surface of the pipe (P) with strong tension. Accordingly, when the pipe film F to be removed is thick or strong, effective removal is possible by strongly varying the tension of the scraper 630.

Figure 16 is a drawing showing an excerpt of the film cutting part of Figure 1, Figure 17 is a plan view for explaining the film cutting part of Figure 16, and Figure 18 is a cross-sectional view for explaining the internal configuration of the film cutting part of Figure 16, Figure 19 is a cross-sectional view for explaining the operation of the film cutting unit of Figure 18.

The coating cutting unit 700 is installed on the second body 300 and cuts the aged coating film (F) formed on the inner peripheral surface of the pipe (P) to a small width so that the coating film peeling unit 600 can easily peel it off. This coating cutting unit 700 is disposed on the second table 340 of the second body 300 and is rotatably installed on the U-shaped cutter bracket 710 opened toward the front and the cutter bracket 710. As a result, tension is applied to a plurality of cutting wheels 720 that cut the aged coating film (F) on the inner peripheral surface of the pipe (P) in the circumferential direction, and to the cutter bracket (710) so that the cutting wheels (720) are in close contact with the coating film (F). It includes a second tension application unit 730 that does.

The cutter bracket 710 rotatably supports a plurality of cutting wheels 720 in a spaced apart state.

The cutting wheel 720 has a diameter of approximately 10 to 20 cm, and as shown in FIG. 17, a plurality of cutting wheels (6 in this embodiment) are installed on the cutter bracket 710. Accordingly, the cutting wheels 720 cut the coating film into small pieces. Cut into wide strap shapes.

The second tension application unit 730 elastically presses the cutting wheel 720 to the inner peripheral surface of the pipe (P) so that the cutting wheel 720 can perfectly cut the coating film (F). This second tension application part 730 is fixed to the second table 340 and is protrudingly coupled to the box jig 731 opened toward the front and the back of the cutter bracket 710 to the box jig 731. A bracket slider 732 that is slidably inserted, a spring 733 installed between the bracket slider 732 and the inner surface 731a of the box jig 731, and the spring 733 and the inner surface 731a of the box base. ) and a pressurizing bolt 735 that is screwed into the screw hole 731b formed through the back of the box jig 731 and selectively pressurizes the pressurizing end 734, which is installed between the pressurizing end 734 and the pressurizing end 734. It is formed at the end of the bolt 735 and includes a handle 736 for rotating the pressurizing bolt 735 forward and backward.

The bracket slider 732 supports the back of the cutter bracket 710, and moves the cutting wheel 720 forward and backward as it protrudes inside the box jig 731.

By this second tension application unit 730, when the cutting wheel 720 is in close contact with the surface of the coating film F of the pipe P, as shown in FIG. 18, the spring 733 is in an open state. is maintained, and accordingly, the elastic force applied to the bracket slider 732 by the spring 733 is small, so the cutting wheel 720 is in close contact with the pipe coating film (F) with a small tension. In this case, the cutting wheel 720 can cut a relatively thin coating film (F).

On the other hand, when the pipe coating film (F) is thick, as shown in FIG. 19, the handle 736 is rotated to move the pressure bolt 735 toward the spring 733. Then, the pressing end 734 presses the spring 733 and greatly increases the elastic force applied to the bracket slider 732. In this case, the cutter wheel 720 is in close contact with the pipeline coating film (F) with a large tension, and accordingly, the cutting wheel 720 can cut the relatively thick coating film (F).

That is, by applying the second tension (730). When the pipe film (F) is thin or thick, or when the strength of the pipe film (F) is strong or small, appropriate tension can be applied with the cutting wheel (720) to cut the paint film (F) without damaging the surface of the pipe (P). It can cut effectively.

By the coating cutting unit 700, the plurality of cutting wheels 720 can cut the coating film (F) into scraps of a small width along the inner peripheral surface of the pipe (P), and thus the coating film peeling unit 600 The scraper 630 can easily and completely scrape and remove the coating film (F) cut in the form of scrap.

As such, according to the present invention, the first and second bodies 100 and 300 on which the first and second rollers 110 and 310 are installed are connected to the first and second damping cylinders 510 and 520 and the intermediate rod 530. ), so it is possible to move along the narrow pipe (P) by mounting it on a bogie with the gap between the first and second bodies (100) (300) narrowed. Furthermore, because it is linear, it creates a space through which people can pass, thereby making workability easier.

Since the first and second gas springs (513) (523) are built into the first and second damping cylinders (510) (520), the film removal equipment of the present invention can rotate smoothly in the pipe (P) even if pipe deformation occurs. Accordingly, the aged coating film (F) can be completely peeled off and removed.

In addition, the first and second rollers 110 and 310 are tilted at a predetermined angle with respect to the first and second bases 120 and 320, so that according to the rotation direction of the first and second rollers 110 and 310, the present invention The film removal equipment can move forward or backward within the pipe (P).

In addition, by not using conventional short balls, the operation of the dust collection device can be minimized by minimizing the generation of dust during the process of removing the old paint film.

In addition, the coating film peeling unit 600 includes a pair of front support wings 610 installed on the first table 140, and a pivot shaft 620 rotatably coupled to the front support wings 610. A plurality of scrapers 630 that are extended and fixed to the rotation axis 620 and are in close contact with the inner peripheral surface of the pipe (P) for scraping and peeling off the aged coating film (F), and a rear scraper installed on the rear side of the front support wing 610. It includes a support wing 640 and a first tension application part 650 that is supported on the rear support wing 640 and rotates the rotation axis 620 clockwise or counterclockwise, and is in close contact with the inner peripheral surface of the pipe (P). By varying the tension of the scraper 630, the coating film P can be effectively scraped and removed, and at the same time, the scraping ability can be maximized by replacing the scraper 630 as needed.

In addition, the coating cutting unit 700 is disposed on the second table 340 of the second body 300, has a U-shaped cutter bracket 710 opened toward the front, and is rotatably installed on the cutter bracket 710. As a result, tension is applied to a plurality of cutting wheels 720 that cut the aged coating film (F) on the inner peripheral surface of the pipe (P) in the circumferential direction, and to the cutter bracket 710 so that the cutting wheels 720 are in close contact with the coating film (F). By including the second tension application portion 730, the coating film F can be cut in the circumferential direction while forming a small width, and accordingly, the scraper 630 of the coating film peeling unit 600 cuts the coating film F into a small width. (F) can be easily and completely removed by scraping.

The present invention has been described with reference to an embodiment shown in the drawings, but this is merely illustrative, and those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom.

100 ... first body 110 ... first roller
111 ... first elastic layer 112 ... first rotation axis
120 ... first base 130 ... first roller support
131 ... 1st stage 132 ... 1st bearing bracket
140 ... 1st table 150 ... 1st tilting variable part
151 ... first shaft coupling portion 152 ... first protrusion
153 ... first protruding part 153a ... first support axis
153b ... 1st ball screw 153c ... 1st long hole
153d ... 1st ball 154 ... 1st automatic operation unit
154a ... first geared motor 154b ... first connector
155 ... 1st circumferential groove 156 ... 1st washer bolt
200 ... first roller driving part 210 ... first geared motor
220 ... 1st motor sprocket 230 ... 1st roller sprocket
240 ... 1st chain 250 ... 1st idler
300 ... 2nd body 310 ... 2nd roller
311 ... second elastic layer 312 ... second rotation axis
320 ... second base 330 ... second roller support
331 ... 2nd stage 332 ... 2nd bearing bracket
340 ... 2nd table 350 ... 2nd tilting variable part
351 ... second shaft coupling portion 352 ... second protrusion
353 ... second protruding part 353a ... second support axis
353b ... 2nd ball screw 353c ... 2nd long hole
353d ... 2nd ball 354 ... 2nd automatic operation unit
354a ... 2nd geared motor 354b ... 2nd connector
355 ... 2nd circumferential groove 356 ... 2nd washer bolt
400 ... 2nd roller driving part 410 ... 2nd geared motor
420 ... 2nd motor sprocket 430 ... 2nd roller sprocket
440 ... 2nd chain 450 ... 2nd idler
500 ... Linear connection 510 ... 1st damping cylinder
511 ... first cylinder tube 511a ... first front nozzle
511b ... first rear nozzle 512 ... first cylinder header
513 ... first gas spring 513a ... first spring body
513b ... 1st spring rod 514 ... 1st front piston
515 ... 1st rear piston 520 ... 2nd damping cylinder
521 ... 2nd cylinder tube 521a ... 2nd front nozzle
521b ... 2nd rear nozzle 522 ... 2nd cylinder header
523 ... second gas spring 523a ... second spring body
523b ... 2nd spring rod 524 ... 2nd front piston
525 ... 2nd rear piston 530 ... intermediate rod
531 ... rod body 532 ... first air hole
533 ... second air hole 600 ... film peeling part
610 ... front support wing 620 ... rotation axis
630 ... scraper 631 ... fixing plate
632 ... Knife plate 640 ... Rear support wing
650 ... 1st tension application 651 ... lever
652 ... front rotating ball 653 ... rear rotating ball
654 ... bolt shaft 655 ... handle
700 ... Paint cutting part 710 ... Cutter bracket
720 ... cutting wheel 730 ... second tension application
731 ... box jig 731a ... inner side
731b ... screw hole 732 ... bracket slider
733 ... Spring 734 ... Pressure end
735 ... pressurizing bolt 736 ... handle
800 ... swivel

Claims (6)

A first body 100 having a first roller 110 that is in close contact with one inner side of the pipe P and moves in a rolling motion;
A first roller driving unit 200 mounted on the first body 100 to rotate the first roller 110;
A second body 300 having a second roller 310 that is in close contact with the other inner side of the pipe P and moves in a rolling motion;
a second roller driving unit 400 mounted on the second body 300 to rotate the second roller 310;
It connects the first body 100 and the second body 300 while spaced apart, and includes a first damping cylinder 510 fixed to the first body 100 and a first damping cylinder 510 fixed to the second body 300. An intermediate rod 530 that appears inside the first and second damping cylinders 510 and 520 while connecting the second damping cylinder 520 and the first damping cylinder 510 and the second damping cylinder 520. ) Linear connection unit 500 including; and
It includes a coating film peeling unit 600 installed on the first body 100 and having a scraper 630 for scraping and peeling off the aged coating film (F) on the inner peripheral surface of the pipe (P),
The first damping cylinder 510 includes a first cylinder tube 511 having an inlet and a first front nozzle 511a and a first rear nozzle 511b through which oil flows in and out on one side and the other side, and Built into the first cylinder header 512 coupled to the inlet of the first cylinder tube 511, and the first cylinder tube 511 between the first front nozzle 511a and the first rear nozzle 511b. A first gas spring 513 that expands and contracts by the applied pressure, and a first front piston ( 514) and a first rear piston 515 built into the first cylinder tube 511 between the first gas spring 513 and the first rear nozzle 511b,
The second damping cylinder 520 includes a second cylinder tube 521 having a second front nozzle 521a and a second rear nozzle 521b through which oil flows in and out on one side and the other side, and an inlet, and A second cylinder header 522 coupled to the inlet of the second cylinder pipe 521, and built into the second cylinder pipe 521 between the second front nozzle 521a and the second rear nozzle 521b. A second gas spring 523 that expands and contracts by the applied pressure, and a second front piston ( 524) and a second rear piston 525 built into the second cylinder pipe 521 between the second gas spring 523 and the second rear nozzle 521b. Improved film removal equipment for pipe rehabilitation. The method of claim 1, wherein the coating film peeling unit 600 is,
A pair of front support wings 610 installed on the first table 140 of the first body 100,
A pivot shaft 620 rotatably coupled to the front support wing 610,
A pipe with improved scraping ability, characterized in that it includes a plurality of scrapers (630) that are extended and fixed to the rotating shaft (620) and in close contact with the inner peripheral surface of the pipe (P) for scraping and peeling off the aged coating film (F). Paint removal equipment for rehabilitation. The method of claim 2, wherein the coating film peeling unit 600 is,
A rear support wing 640 installed on the rear side of the front support wing 610,
A first tension application unit 650 that rotates the rotation axis 620 clockwise or counterclockwise to vary the tension of the scraper 630 supported by the rear support wing 640 and in close contact with the inner peripheral surface of the pipe (P). ), a film removal equipment for pipe rehabilitation with improved scraping ability, characterized in that it includes. The method of claim 3, wherein the first tension application unit 650,
A lever 651 protruding from the rotation axis 620,
A front rotating ball 652 rotatably supported at the end of the lever 651 and having a penetrating interior,
A rear rotating ball 653 rotatably coupled to the rear support wing 640 and having a screw hole formed therein,
Film removal for pipe rehabilitation with improved scraping ability, characterized in that it includes a bolt shaft 654 screwed to the screw hole of the rear rotating ball 653 in a state of being loosely coupled to the front rotating ball 652. equipment. delete The method of claim 1, wherein the intermediate rod 530 is:
A rod body 531 connected to the first front piston 514 through the first cylinder header 512 and coupled to the second front piston 524 through the second cylinder header 522,
A first air hole 532 passing through the first front piston 514 inside one side of the rod body 531 and communicating with the space on the side of the first gas spring 513 and external air,
Characterized in that it includes a second air hole 533 that penetrates the second front piston 524 inside the other side of the rod body 531 and communicates with the space on the side of the second gas spring 523 and external air. , Film removal equipment for pipe rehabilitation with improved scraping ability.

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