KR0158772B1 - Sync. coating apparatus for pipes - Google Patents

Abstract

The present invention improves coating efficiency by coating two large tubes at a time at the same time and deposits the entire tube in the coating liquid to improve coating efficiency and allow coating of uniform thickness to two large diameter tubes. And a pair of support rails installed on the floor to support the tube to be coated thereon for providing the same; A swing arm installed at the end of the support rail by a cylinder operation to transfer a tube placed on the upper portion of the support rail to the front of the support rail; A pipe conveying device for holding the pipe placed on the support rail two by two to move the sandwiched body by self-driving means in an axial direction along a transport rail installed in the air and to raise or lower the pipe; ; An adhesive container for depositing the tubular body as an enclosure placed across the transfer rails to the front bottom of the support rail and containing an adhesive applied by pretreatment prior to coating the resin solution on the tubular body; A resin liquid storage container installed in front of the adhesive container and accommodating a pipe body descending from an upper portion thereof to coat the resin liquid; A cooling device installed in front of the resin liquid reservoir and spraying cooling water from both sides of the lowered pipe; A protective solvent accommodating passage installed in front of the cooling apparatus and accommodating a protective solvent applied to protect the resin coating layer; And a discharge rail installed to extend outwardly from the inside of the transfer rail to discharge the coated body in front of the protective solvent container. It consists of

Description

Simultaneous Coating on Two Large Diameter Tubes

1 is an external perspective view of the whole apparatus showing one embodiment of the present invention.

2 is a side view of the tube clamp and the rotary ball of the present invention.

3 is a sectional view taken along the line A-A of FIG.

Figure 4 is a cross-sectional view B-B showing the tubular support cap.

* Explanation of symbols for main parts of the drawings

1: pipe conveying device 2: pillar

3: Transfer rail 4: Transfer bogie

5: tube clamp and rotary ball 6: rope

7: towing device 8: main shaft

9: driven shaft rod 11: support member

12,15,18,18 ': Wheel 13: Chain

14: V-shaped groove 16,16 ': tube

17,17 ': Support cap 19,19': Hole

20: fixture 21: swing arm

22: glue container 23: resin solution reservoir

24: cooling device 25: protective solvent container

27: support rail 28: discharge rail

29: big gear 30: pinion

31: Self-driving means 32: Feeding roller

33: recovery container 34: stopper

35: stopper

[Industrial use]

The present invention relates to a coating apparatus for a large diameter tube suitable for use in coating a corrosion preventing resin on the inner and outer surfaces, in particular the outer surface, of a plurality of large diameter tubes.

[Private Technology]

Recently, the inner and outer surfaces of large diameter steel pipes including water pipes and hollow piles are coated with epoxy resins to increase corrosion resistance to prevent corrosion.The coating method on the inner surface of pipes is epoxy resin through rotating spray nozzles. The method of conveying the nozzle in the axial direction while spraying the inner surface of the tube is mainly used or it is an improved method proposed by the present inventors through Korean Patent No. 94-11870 (filed on May 30, 1994). A coating method has been used in which the coating thickness is constant by spraying an epoxy resin while rotating the nozzle and transferring the spray nozzle in the axial direction along the inside of the rotating tube.

However, the outer surface of the tube is coated with two kinds of coatings on the two rails without any coating method, and the resin is applied by applying a brush or spraying properly. There was a lot of work and the working efficiency was also low.

This is due to the fact that the industry did not make any efforts to improve the working method under the recognition that the coating on the outer surface of the tube is less important than the inner surface, and the present inventors have taken this into consideration in Korean Patent No. 95-4644 (95.3). 8 application) has proposed a coating method and apparatus for the outer surface of a large diameter tube.

The present invention is provided with a roller device that can be rotated at the same time to transport the tube in the axial direction, and then the pre-treatment device, resin solution injection device, drying device, etc. in turn along the axial direction and then the outer peripheral surface of the tube being rotated in the axial direction The resin liquid is coated by spraying.

[Problems with Prior Art]

However, the above-mentioned invention is spraying the resin liquid while rotating the pipe in the axial direction, as compared to the coating by a brush, which is conventionally used as a coating method of the outer surface of the tube, or simply by spray spraying on the outer surface of the tube in a stationary state. As a result, the resin solution is evenly applied to the surface of the tube and the coating defect rate is significantly reduced.However, the coating surface may be damaged by the rotary feed roller that is responsible for the rotation and simultaneous rotation while supporting the tube. There is a disadvantage that the working speed is still slow because the injection method of spraying the resin liquid toward a part of the tube.

[Problem to Solve Invention]

The present invention has been made in view of the above problems, and its object is to pinch two large tubes at a time and then rotate and transfer them to deposit the entire tube in the coating liquid, thereby improving coating efficiency and coating of uniform thickness. The present invention provides a simultaneous coating apparatus for two large diameter tubes.

[Means for solving the problem of the invention]

The present invention comprises a pair of support rails installed on the floor to support the tube to be coated as a means for achieving the above object; A swing arm installed at the end of the support rail by a cylinder operation to transfer a tube placed on the upper portion of the support rail to the front of the support rail; A pipe conveying device for holding the pipe placed on the support rail two by two to move the sandwiched body by self-driving means in an axial direction along a transport rail installed in the air and to raise or lower the pipe; ; An adhesive container for depositing the tubular body as an enclosure placed in front of the support rail between the transfer rails and containing an adhesive applied by pretreatment prior to coating the resin liquid on the tubular body; A resin liquid storage container installed in front of the adhesive container and accommodating a pipe body descending from an upper portion thereof to coat the resin liquid; A cooling device installed in front of the resin liquid reservoir and spraying cooling water from both sides of the lowered pipe; A protective solvent accommodating passage installed in front of the cooling apparatus and accommodating a protective solvent applied to protect the resin coating layer; And a discharge rail installed to extend outwardly from the inside of the transfer rail to discharge the coated body in front of the protective solvent container. It consists of

EXAMPLE

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the drawing, reference numeral 1 denotes a tube conveying apparatus. The tube conveying apparatus 1 of the present invention carries a conveying bogie 3 traveling on a surface of a conveying rail 3 and a conveying rail 3 installed side by side on a plurality of pillars 2 vertically placed. 4) and the tube holding body and the rotary ball (5) moving together with the feed cart (4).

The tube clamp and the rotary ball 5 are suspended from both ends of the pipe 6 through the rope 6, and the rope traction device 7 mounted on the truck 4 is driven forward and reverse so that the rope 6 is rotated. When moving or unwinding, it moves up and down.

The tube clamp and the rotary ball 5 are provided with a main shaft rod 8 and a driven shaft rod 9 arranged side by side in two stages between the rails 3 and 3, and with two shafts 8 and 9 Both ends of are supported by the support member 11 vertically inserted through the bearing 10 so that rotation is possible. One end of the rope 6 is tied to the support member 11, and when the rope 6, on which the towing device 7 is wound, is released, the tube clamp and the rotary ball 5 are lowered, and to the contrary, the tow is wound up. do.

The main shaft rod 8 is rotated by a self-driving means 31 composed of a gear reduction device and a chain transmission device. The gear reduction device of the self-driving means 31 is not shown in FIG. As shown in the cross-sectional view, the drive motor M is mounted on the support member 11, and the pinion 30 fixed to the motor shaft and the large gear 29 fixed to the support shaft 8 'of the main shaft bar 8 are fixed. ) To interlock. The rotational force of the main shaft bar (8) is transmitted to the other parts of the tube clamp and the rotary hole (5) through the chain transmission device for this purpose, the wheel for hanging the chain (13) on the outer peripheral surface of the main shaft bar (8) ( 12) is formed and the wheel 12 has a shape in which two discs face each other, and a V-shaped groove 14 for accommodating the chain 13 is formed between the disc and the disc.

Similarly, the wheel 15 that hangs the chain 13 on the outer circumferential surface of the driven shaft rod 9 opposite to the wheel 12 is formed in the same shape. The chain 13 is much longer than the length between the two shafts 8, 9 and is bent to abut on the top of the wheels 12, 15 of the shafts 8, 9 and on both sides of the driven shaft bar 9. As the extra chain 13 is stretched, the chain 13 has a reverse heart shape ( ) Is mounted to form a closed loop.

Support caps 17 and 17 'for holding two tubular bodies 16 and 16', respectively, are accommodated in the two W-shaped recesses of the chain 13 hanging on both sides of the driven shaft rod 9, respectively. To this end, wheels 18 and 17 having the same shape as the wheels 12 and 15 in which the chain 13 of the main and driven shaft rods 8 and 9 are wound around the support caps 17 and 17 '. 18 'is formed, and both ends of the tubular bodies 16 and 16' are inserted into the holes 19 and 19 ', and the tubular bodies 16 and 16' are inserted into the fasteners 20 such as a plurality of bolts. It is fixed through. In this case, the outer ends of the support caps 17 and 17 'are blocked when coated only on the outer surface of the tubular body, and the holes 19 penetrate in the axial direction when the outer ends of the support caps 17 and 17' are simultaneously coated.

The chain 13 is U-shaped around the lower end of the wheel 18 formed on the support cap 17 under one side of the rear driven shaft rod 9 spanning the V-shaped groove 14 on the upper surface of the wheel 12. After winding the upper part of the wheel 15 of the driven shaft rod 9 in a cap shape and again winding the lower end of the wheel 18 'in a U shape, the wound shape of the chain 13 is a heart shape (♡). The shape is upside down.

The wheels 12, 15, 18, and 18 'may also use a sprocket wheel having a gear shape, but the tubular body is so heavy that there is no risk of slippage between the chain 13 and accurate rotation ratio. Therefore, it is easy to manufacture the disk having a V-shaped groove simply protrudes.

Here, the transfer truck 4 for reciprocating the rails 3 and 3 has the same structure as that of a conventional overhead crane, and thus detailed illustration and description thereof will be omitted. The tubular body is drawn in from the right angle direction of the conveying rail 3, and the feed roller 32 is installed at the bottom of one end of the rail 3 in a row for this purpose. In the course of transport to the front of the apparatus, the rust removed tube is placed between the transfer rails 3 while passing through a blasting machine not shown.

The swing arm 21 which is rotated by the operation of the cylinder 26 is located under the pipe mounted on the transfer roller 32, and the support rail 27 is the transfer rail 3 at the tip of the swing arm 21. Parallel to the floor. When the swing arm 21 is rotated by the operation of the cylinder 26, the tubular body is lifted from the support state by the transfer roller 32, rolled down along the forwardly inclined swing arm 21, and the support rail 27 is distal. Is stopped by the stopper 34.

In front of the support rails 27, an adhesive container 22, which is a rectangular box, is placed across both transfer rails 3, and in the adhesive container 22, an adhesive applied as a pretreatment before the resin liquid is applied to the surface of the tube body. Is accommodated. The adhesive container 22 is sized enough to accommodate two tubes. In front of the adhesive container 22 containing the adhesive is placed in the resin liquid reservoir 23 also has a rectangular shape, and in front of the resin liquid reservoir 23 is a cooling device 24 for spraying the cooling water through the injection pipe. . Below the cooling device 24, a recovery container 33 for recovering the injected water is placed, and the recovered water is returned to a tank (not shown) by the operation of the pump device.

Again, a protective solvent container 25 is located in front of the cooling device 24, the protective solvent container 25 is accommodated in the protective solvent to be applied to the surface of the coating film to protect the resin coating layer. A discharge rail 28 is installed in the front of the protective solvent container 25 in parallel with the transfer rail 3, and the discharge rail 28 extends from the inside of the transfer rail 3 to the outside, and the tubular body moves by itself. It is preferable that the tip of the discharge rail 28 is lower than the rear end, that is, to be inclined so that the stopper 35 is provided at the tip.

Hereinafter will be described the operation of the present invention.

The tubes 16 and 16 ′ in which the rust on the inner and outer surfaces are removed from the shot blasting machine are sequentially transferred along the rotary rollers 32 one by one to be positioned above the swing arm 21. When the next cylinder 26 is operated, the swing arm 21 rotates to form an inclined surface, and the tubular body 16 is rolled down on the inclined surface by its own weight and stopped by the stopper 34 in front of the support rail 27. 16 is positioned below the transfer rail 3, and then another tube 16 'is placed on the support rail 27 in the same manner.

Next, the traction device 7 is operated from the transport trolley 4 transferred to the upper portion of the tubular body 16, 16 'along the transport rail 3 to release the rope 6 wound on the drum. Accordingly, the driving shaft rod 8 and the driven shaft rod 9 suspended on the rope 6 are lowered, and the driven shaft rod 9 is lowered to reach the support rails 27. Then, the support cap 17 located in front of the driven shaft rod 9 is inserted into both ends of the tubular body 16, and then the fastener 20 is tightened to fix it, and the chain 13 is inserted into the V-shaped groove of the wheel 18. Adjust so that

Next, the support cap 17 'positioned at the rear of the driven shaft rod 9 is fixed to the second tube 16', and then the traction device 7 is driven to wind the rope 6. In the step of inserting the support caps 17 and 17 'into the tubular body, the chain 13 is loosely stretched, so when the rope 6 is wound, only the main shaft rod 8 and the driven shaft rod 9 are initially raised. When the chain 13, which is wound around the lower end of the wheels 18 and 18 ', is tightened, the tubular body 16 and 16' positioned before and after the driven shaft bar 9 are lifted. Will be raised.

When the tube clamp and the rotary ball 5 are rotated upward, the traction device 7 stops driving and the feed cart 4 travels forward on the rail 3 surface by the operation of a driving motor (not shown). The feed cart 4 stops driving in the upper portion of the adhesive container 22, and then the traction device 7 is driven to release the rope 6 to lower the tube clamp and the rotary ball 5.

At this time, a motor (M) provided to rotate the main shaft (8) is operated to rotate the pinion (30) and to rotate the main shaft (8) through a large gear 29 engaged with the pinion (30). do. Due to the heavy weight of the raised tubular body 16, 16 ', the chain is strongly adhered to the V-shaped grooves 14 of the respective wheels 12, 15, 18, and 18'. When (8) is rotated in one direction, both side tubes (16, 16 ') is rotated in the same direction as the rotation direction of the main shaft 8, and the driven shaft (9) is rotated in the opposite direction. The tube clamp and the rotary ball 5 are lowered until both side tubes 16 and 16 ', which are struck back and forth of the driven shaft rod 9, are deposited in the adhesive liquid in the adhesive container 22, and the adhesive liquid is surfaced. The buried tubular body 16, 16 'is raised by the winding operation of the wire 6 by the traction device 7.

In this process, the tubes 16 and 16 'continue to rotate, so that the adhesive liquid applied for the primer treatment does not flow down the tube by gravity and forms a uniform layer on the outer surface of the tube. When the pipe clamp and the rotary hole 5 are lifted out of the adhesive container 22 to the upper part, the driving device of the traction device 7 is stopped and the transfer cart 4 moves along the rail 3 for the next step of resin application. To stop at the upper portion of the resin reservoir (23).

Then, the traction device 7 is driven again to lower both sides 16 and 16 'and immerse it in the resin liquid reservoir 23. At the same time, both sides 16 and 16' are continuously rotating so that the resin liquid The surface is evenly spread on the surface. The tubular body 16, 16 'coated with the resin liquid is lifted together along the wire 6 which is wound by the reverse drive of the traction device and the feed cart 4 moves along the rail 3 to the next working position. Will be.

When the feed cart 4 is transported and reaches the top of the cooling device 24, the traction device 7 releases the wire 6 so that the tubular body 16, 16 ′ is located in the center of the injection tube of the cooling device 24. do. The cold water or cooling air sprayed from the cooling device 24 then causes the resin coating layer to harden quickly. At the end of the stabilization of the coating film, the traction device 7 winds up the wire 6 so that the tube clamp and the rotary hole 5 are raised, and the transfer cart 4 is at the upper end of the protective solvent container 25, which is the final work position. Stop In addition, by the traction device 7, the tube clamp and the rotary ball 5 are lowered, and the tube bodies 16 and 16 'are immersed in the container 25.

In order to protect the coating film, the coated tubular body 16 and 16 'is lifted upward by driving the traction device 7 and the motor M is stopped to rotate the tubular body 16 and 16'. Stop it.

Next, the feed cart 4 is driven so as to be positioned above the discharge rail 28, and the traction device 7 is driven again so that the tubular body 16, 16 'is mounted on the discharge rail 28. Loosen enough.

Finally, by unscrewing the fixture 20 and removing the support caps 17 and 17 'fitted to both sides of the tubular body 16 and 16', the tubular body 16 and 16 'are removed from the tip of the discharge rail 28. The tube clamps and the rotary holes 5 which are stacked while being sequentially placed from the stopper 35 and which lay down the tube 16 and 16 ′ on the discharge rail 28 are raised again, and together with the support rail 4 together with the support rail ( 27) It is transferred to the upper part and the next tube is clamped to continuously repeat the operation of the above process.

[Effects of the Invention]

According to the present invention as described above it is possible to coat two tubes at the same time at the same time in coating a large-diameter tube, and the whole pipe is deposited and coated, so that the working speed is doubled compared to the conventional injection method, and the tube continues. Since it rotates by the resin solution, it is effective to prevent defects in the coating thickness caused by the flow of resin liquid and the like.

Claims (5)

A pair of support rails installed at the bottom to support the tube to be coated; A swing arm installed at the end of the support rail by a cylinder operation to transfer a tube placed on the upper portion of the support rail to the front of the support rail; A pipe conveying device for holding the pipe placed on the support rail two by two to move the sandwiched body by self-driving means in an axial direction along a transport rail installed in the air and to raise or lower the pipe; ; An adhesive container for depositing the tubular body as an enclosure placed across the transfer rails to the front bottom of the support rail and containing an adhesive applied by pretreatment prior to coating the resin solution on the tubular body; A resin liquid storage container installed in front of the adhesive container and accommodating a pipe body descending from an upper portion thereof to coat the resin liquid; A cooling device installed in front of the resin liquid reservoir and spraying cooling water from both sides of the lowered pipe; A protective solvent accommodating passage installed in front of the cooling apparatus and accommodating a protective solvent applied to protect the resin coating layer; And a discharge rail installed to extend outwardly from the inside of the transfer rail to discharge the coated body in front of the protective solvent container. Simultaneous coating device for two large diameter tube, characterized in that consisting of. According to claim 1, wherein the tube conveying device and two conveying rails are installed in the air in parallel; A plurality of pillars installed to support the conveying rail, a conveying bogie reciprocating along the conveying rail, a wire traction device mounted on the conveying bogie, and a wire traction of the wire traction device Two stand characterized in that it consists of a clamping body and a rotary ball having a fixed cap for moving and fixed to the two ends of the two large diameter tube and the self-driving means for rotating the two bodies fixed by the fixing cap Simultaneous coating device for diameter pipes. According to claim 2, The tube clamp and the rotating sphere is a main and driven shaft bar disposed in the upper and lower stages as a rotatable structure via a bearing in the support member is vertically installed; And a support cap positioned at both sides of the lower portion of the driven shaft rod and fitted to both ends of the two tubular bodies and fixedly connected by a fixture such as a bolt; And self-driving means including a chain installed by winding the main and driven shaft rods and the support cap in a reverse heart shape, a reduction gear device and a driving motor provided to rotate the main shaft shaft. Simultaneous coating device for two large diameter tube, characterized in that consisting of. 4. The apparatus of claim 3, wherein a wheel having a V-shaped groove for hooking the chain is formed outside the main and driven shaft rods and the support cap. The simultaneous coating apparatus for the two large diameter tubular bodies according to claim 1, wherein a stopper for stopping the transfer of the tubular body is provided at the front end of the support rail and the discharge rail.