KR20210151485A - Coating removal apparatus and rotary joint thereof - Google Patents

Abstract

Provided are a coating removal device capable of efficiently removing the coating formed on an inner surface of a pipeline, and a rotary joint therefor. According to an embodiment of the present invention, a coating removal device for removing the coating of a pipeline comprises: a main body part; a rotary arm which rotates based on a rotary shaft coupled to a central axis of the main body part; a needle scaler coupled to one end of the rotary arm to remove the coating; and a guide roller coupled to one end of the rotary arm while being spaced apart from the needle scaler, and guiding the needle scaler while moving along the inside of the pipeline.

Description

Coating film removal device and rotary joint therefor {COATING REMOVAL APPARATUS AND ROTARY JOINT THEREOF}

The present invention relates to a film removal device and a rotary joint. In more detail, a film removal device capable of removing the coating film by contacting the needle scaler with the inside of the pipe while a guide roller installed spaced apart from the needle scaler guides the needle scaler, and a rotary that can smoothly supply air and current to the needle scaler It's about joints.

Pipes such as large-diameter pipes for water supply are water pipes with an inner diameter of about D3000mm, and a coating film is formed inside the pipes. In order to rehabilitate the pipeline, the work of removing the coating film formed on the inside of the pipeline must be preceded so that the blasting process and the process of installing a new coating material on the inner wall of the pipeline can be performed.

However, when working inside the pipeline, an unexpected risk may occur, and since the amount of coating film to be removed is large, it is difficult for a person to directly enter the pipeline and manually work. Accordingly, there is a need for a technology for automatically removing the coating film, and thus related technologies are being developed for the coating film removal apparatus.

However, since the size of the inside of the pipe is not uniform, and the coating film is deformed in different shapes inside the aging pipe, when using the conventional film removal device having a fixed length, it does not exactly fit the size of the inside of the pipe. There was a problem.

In addition, in the case of a conventional coating film removal device, the coating film is removed while rotating while a component such as a roller is in direct contact with the coating film. this existed. Accordingly, there is a need for a means capable of removing the coating film while applying an appropriate force to the outer surface of the coating film.

In addition, in the case of a coating film removal device having a length longer than the inner diameter of the pipe, there is a risk of damaging the surface of the pipe, and in the case of a coating film removing device having a length shorter than the inner diameter of the pipe, there is a problem that the coating film cannot be removed properly. . Therefore, there is a demand for a coating film removal device capable of removing the coating film with an appropriate force while adjusting the length to fit the length of the interior of the pipeline. Currently, a coating film removal device that can satisfy all these requirements has not been developed. .

Registered Patent Publication No. 10-1854183 (published on May 09, 2012)

The technical problem to be solved by the present invention is to provide a coating film removal device in which a needle scaler is installed at the end of a rotary arm to efficiently remove a coating film formed on the inner surface of a conduit.

Another technical problem to be solved by the present invention is to form an air path capable of injecting air into the rotary joint to provide a coating film removal device that smoothly injects air to the position where the needle scaler is installed through the rotating arm that rotates. to be.

Another technical problem to be solved by the present invention is to form an electric path through which current passes through the rotary joint to prevent the electric wire from being twisted by the rotation of the rotary arm, and to remove the coating film that smoothly transmits the current to the location where the needle scaler is installed to provide the device.

Another technical problem to be solved by the present invention is to provide a coating film removal device in which the length of the rotary arm is adjusted so that the needle scaler can remove the coating film at an appropriate distance without damaging the inner surface of the pipe.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

In order to solve the above technical problem, the coating film removal device according to an embodiment of the present invention is a coating film removal device for removing a coating film from a pipe, the main body portion, rotating based on a rotation axis coupled to the central axis of the main body portion A rotary arm, a needle scaler coupled to one end of the rotary arm to remove the coating film, and a guide roller coupled to one end of the rotary arm while being spaced apart from the needle scaler and guiding the needle scaler while moving along the inside of the conduit may include

In one embodiment, the rotary joint may further include a rotary joint for coupling the axis of rotation and the central axis of the rotary arm.

In an embodiment, the rotary joint may include a fixed joint connected to and fixed to the central shaft and a rotary joint connected to the rotary arm.

In an embodiment, the rotary joint may include a conductor coupled between the fixed joint and the rotary joint through which current flows in a liquid state.

In one embodiment, it may further include a length adjusting unit for adjusting the length of the rotary arm to the inside of the conduit.

In one embodiment, when the length adjusting unit is in contact with the inside of the conduit and the rotary arm is pressed, it is compressed by elasticity to shorten the length of the rotary arm, and when the distance to the inside of the conduit increases, by elasticity It may include a spring part having a longer length.

In an embodiment, the rotary arm may include a first arm facing a first direction and a second arm facing a second direction.

In one embodiment, the needle scaler, at least one needle is in contact with the inside of the conduit, and the at least one needle transfers vibration generated using the rotational energy of the motor to the inner conduit of the conduit to remove the coating film it could be

In one embodiment, the body portion may be to proceed in the working direction of removing the coating film.

In one embodiment, the body unit may include a universal motor connected to the rotation shaft by a chain to rotate the rotation shaft.

In an embodiment, the main body may proceed in a working direction of removing the coating film based on the speed at which the universal motor rotates the rotating shaft.

A rotary joint according to an embodiment of the present invention includes a fixed joint and a rotary joint connected to the fixed joint, and uses a needle scaler of a rotary arm and a guide roller to guide the needle scaler. installed in the removal device, coupling the central axis of the coating film removal device and the rotation shaft of the rotary arm, the fixed joint is connected to the central shaft of the coating film removal device, and the rotation joint includes the rotation shaft of the rotary arm can be connected

In an embodiment, an air path through which air input through the fixed joint passes to the rotary joint and an electric path through which electric power input through the fixed joint passes through the rotary joint may be formed.

In one embodiment, the air path may be a path through which air is discharged through the needle scaler connected from the central axis to the needle scaler through the center of the rotating body.

In an embodiment, the fixed joint may be formed with an input portion to which the air path and the electric path are input.

In one embodiment, the rotary joint may be formed with a discharge part in which the air path and the electric path are connected to the rotation part.

1 is a perspective view of a coating film removal apparatus according to an embodiment of the present invention.
FIG. 2 is a view for explaining an operation of removing the coating film while the rotary arm of the coating film removal device of FIG. 1 rotates.
3 is a view of the inside of the main body of the coating film removal apparatus according to the present embodiment viewed from above.
4 is a side cross-sectional view showing the cross-sectional structure of the rotary joint according to the present embodiment.
5 is an exemplary view showing a state in which the rotary joint according to the present embodiment is coupled to the central axis and the rotating shaft.
6 is a view for explaining the rotary arm of the coating film removal apparatus according to the present embodiment.
7 is a side view for explaining the configuration of the rotary arm according to the present embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not to be interpreted ideally or excessively unless clearly specifically defined. The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. In this specification, the singular also includes the plural unless otherwise specified in the phrase.

Hereinafter, some embodiments of the present invention will be described with reference to the drawings.

1 is a perspective view of a coating film removal apparatus 1000 according to an embodiment of the present invention.

Referring to FIG. 1 , the coating film removal device 1000 according to the present embodiment is a device for removing the coating film formed inside the pipeline by being put into the interior of the pipeline. It can also be used to remove the material formed on the surface. In one embodiment, the coating film removal apparatus 1000 may be used in a pipe having an inner diameter of D1000mm or more.

The coating film removing apparatus 1000 may include a main body 100 and a rotating arm 200 . The main body 100 may be combined with each component for operating the coating film removal apparatus 1000 . The main body 100 may move the coating film removing apparatus 1000 using a moving means.

The rotary arm 200 may be coupled to the main body 100 and remove the coating film while rotating based on the rotation axis. The rotary arm 200 may rotate in a direction perpendicular to the moving direction of the main body 100 when viewed from the upper side of the main body 100 . The rotary arm 200 may have a needle scaler 21 and a guide roller 23 coupled to one end. The rotary arm 200 includes a first arm 200_1 facing one side from the central axis 110 and a second arm 200_2 facing the opposite direction from the central axis 110 to the first arm 200_1 . can However, this configuration does not limit the shape of the rotary arm 200 , and the rotary arm 200 may be formed of three or more arms. A needle scaler 21_1 and a guide roller 23_1 may be coupled to one end of the first arm 200_1, and a needle scaler 22_2 and a guide roller 23_2 may be coupled to the second arm 200_2 at one end. have.

The needle scaler is in contact with the coating film inside the pipeline, but the coating film can be removed using physical force while in contact with the coating film. The needle scaler 21 may be made of at least one needle. The needle scaler 21 may use a motor to generate a physical force on at least one needle, and may remove the coating film by transferring vibrations generated using the rotational energy of the motor to the coating film. In one embodiment, the motor that transmits the physical force to the needle scaler 21 transmits rotational energy to the crankshaft by rotation, the crankshaft transmits linear energy by reciprocating motion to the piston, and the piston generates vibration to vibrate the needle scaler. At this time, the needle scaler 21 may vibrate at 3000 times/min.

The guide roller 23 can guide the operation of the needle scaler 21 by being in contact with the inside of the conduit and in contact with the inside of the conduit that has already been removed. Specifically, the guide roller 23 can guide the rotary arm 200 to rotate according to the shape of the inside of the conduit by making close contact with the area where the coating film has already been removed from the inside of the conduit. The needle scaler 21 is installed to be spaced apart from the guide roller 23 , and may be installed on the rotary arm 200 with a length that is slightly shorter than that of the guide roller 23 . When the guide roller 23 guides the rotary arm 200 while moving inside the pipe while in contact with the inside of the pipe, the needle scaler 21 is installed to a slightly shorter length than the guide roller 23, so the pipe line There is no direct physical force applied to the inner surface of the Therefore, the needle scaler 21 can remove only the coating film without damaging the inner surface of the pipeline.

In addition, as will be described later, the length of the coating film removal apparatus 1000 according to an embodiment of the present invention is adjusted by the length adjusting unit. can keep distance.

In addition, in the coating film removal device 1000, even if the shape of the inside of the pipe is elliptical or uneven, the length is adjusted according to the inner surface using the guide roller 23, so the needle scaler 21 is the shape of the inside of the pipe. Regardless of what shape it is formed in, even if the inside of the pipe is formed in an irregular shape, the coating film can be removed without damaging the inner surface of the pipe.

FIG. 2 is a view for explaining an operation of removing the coating film while the rotary arm 200 of the coating film removing apparatus 1000 of FIG. 1 rotates.

Referring to FIG. 2, when the rotary arm 200 of FIG. 1 rotates counterclockwise, the guide roller 23 comes into contact with the surface of the pipe from which the coating film has been removed to guide the rotary arm 200, and a needle scaler ( 21) comes in contact with a coating that has not yet been removed and can remove the coating by applying a physical force. The rotary arm 200 is shown to rotate in a counterclockwise direction, but the rotation direction is not limited thereto. The needle scaler 21 rotates 360 degrees by the rotation of the rotary arm 200 to remove the inner coating film of the conduit. At this time, as the body part 100 moves the coating film removal apparatus 1000 in the operation direction for removing the coating film, the operation can be performed while continuously moving the needle scaler 21 to the area where the coating film that has not been removed is located.

The general configuration and operation of the coating film removal apparatus 1000 according to an embodiment of the present invention has been described above with reference to FIGS. 1 and 2 , and the rotary arm 200 is a body part with reference to FIGS. 3 to 5 . The structure coupled to 100 and the rotary joint 300 for rotating the rotary arm 200 will be described.

3 is a view of the inside of the main body 100 of the coating film removal apparatus 1000 according to the present embodiment viewed from above, and FIG. 4 is a side cross-sectional view showing the cross-sectional structure of the rotary joint 300 according to the present embodiment. , FIG. 5 is an exemplary view showing a state in which the rotary joint 300 according to the present embodiment is coupled to the central shaft 110 and the rotation shaft 210 .

Referring to FIG. 3 , the rotating shaft 210 may be coupled to the main body 100 , and the rotating shaft 210 may be coupled to the central shaft 110 formed in the body 100 . Specifically, the rotary arm may have a rotational shaft 210 serving as a reference for rotation, and the rotational shaft 210 of the rotary arm may be coupled to a central shaft 110 formed in the body part 100 . In this case, the rotary joint 300 may couple the rotation shaft 210 and the central shaft 110 . The rotary joint 300 may include a fixed joint 310 and a rotary joint 330 as shown in FIG. 4 . The fixed joint 310 is connected to the central shaft 110 to be fixed, and the rotary joint 330 ) is a configuration that can be rotated in connection with the rotation shaft 210 .

The universal motor 130 may be mounted on the main body 100 , and the universal motor 130 may rotate the rotating shaft 210 . The universal motor 130 may be connected to the rotation shaft 210 by a chain to transmit rotational power to the rotation shaft 210 . In one embodiment, the universal motor 130 may rotate the rotating shaft 21 at a rate of 0.5 to 12 times/min.

In one embodiment, the main body 100 may move based on the speed at which the universal motor 130 rotates the rotation shaft 210 when moving forward. For example, the body part 100 may remove the coating film only by the width at which the coating film is removed by the needle scaler 21 according to the speed at which one rotation is completed in consideration of the speed at which the universal motor 130 rotates the rotation shaft 210 once. You can advance in the direction of the removal operation. In one embodiment, the main body 100 may move at a speed of 2.0 cm/min to 20 cm/min according to the rotation speed of the rotating shaft 210 .

Referring to FIG. 4 , the rotary joint 300 may include a fixed joint 310 , a rotary joint 330 , a conductor part 350 , an air path 370 , and an electric path 390 .

The fixed joint 310 may be connected to the central axis and fixed to the central axis. In the fixed joint 310 , an input part 311 into which the air path 370 and the electric path 390 are input may be formed. The rotary joint 330 may be connected to the rotary shaft of the rotary arm to rotate together with the rotary shaft. In the rotary joint 330 , an air path 370 and an electric path 390 may be discharged through a discharge unit 331 may be formed.

The air path 370 is a configuration for inputting air entering the rotary joint 300 into the rotary arm, and may be formed as a passage through which air passes from the fixed joint 310 to the rotary joint 330 .

The electric path 390 is a configuration for inputting a current entering the rotary joint 300 to the rotary arm, and is a configuration for a path through which a current flows from the fixed joint 310 to the rotary joint 330 . The electric path 390 may transmit current through the conductor part 350 coupled between the fixed joint 310 and the rotary joint 330 . The fixed joint 310 is fixed to the central shaft 110, and the rotary joint 330 is rotated by the rotary shaft. can be Accordingly, the conductor part 350 is installed between the fixed joint 310 and the rotary joint 330 to prevent twisting of the electric wire, so that the current can be transmitted even when the rotary joint 330 rotates. In an embodiment, the conductor part 350 may be made of mercury in a liquid state through which an electric current passes.

Referring to FIG. 5 , the rotary joint 300 may connect the central axis and the rotation axis, and connect the air path 370 and the electric path 390 . The fixed joint 310 of the rotary joint 300 may be coupled to the main body 100 . In the rotary joint 300 , an air path 370 to which air is supplied from the fixed joint 310 and an electric path 390 to which a current is supplied may be input to the rotary joint 330 .

The rotary joint 330 may be connected to the rotary shaft, and may be rotated together by the rotation of the rotary shaft. In this case, the rotating shaft may be rotated by the rotation of the universal motor as described above.

Up to now, a structure in which the rotary arm 200 is coupled to the main body 100 and the rotary joint 300 for rotating the rotary arm 200 have been described with reference to FIGS. 3 to 5 . Hereinafter, the structure of the rotary arm 200 will be described in more detail with reference to FIGS. 6 and 7 .

6 is a view for explaining the rotary arm 200 of the coating film removing apparatus 1000 according to the present embodiment, and FIG. 7 is a side view for explaining the configuration of the rotary arm 200 according to the present embodiment.

Referring to FIG. 6 , the rotary arm 200 may include a first arm 200_1 , which faces a first direction, and a second arm 200_2 , which faces a second direction with respect to the rotary shaft 210 . Here, the first direction and the second direction may refer to various directions positioned on a path in which the rotary arm rotates. The rotary arm 200 may rotate in a direction perpendicular to the moving direction of the main body 100 when the main body 100 of the coating film removing apparatus 1000 is viewed from the upper side. The rotary arm 200 may have perforated holes for coupling the needle scaler and the guide roller at an appropriate distance, if necessary, at various positions. In one embodiment, the perforated hole formed in the rotary arm 200 may be formed at a position where the length of the scaler and the guide roller can be adjusted up to about 15 cm.

Referring to FIG. 7 , the length adjusting unit 25 may adjust the length of the rotary arm 200 up to the inner surface of the conduit. The length adjustment unit 25 adjusts the length to the inner surface of the conduit of the needle scaler 21 coupled to the rotary arm 200, or the inner surface of the conduit of the guide roller 23 coupled to the rotary arm 200 You can adjust the length up to

In one embodiment, the length adjusting unit 25 is in contact with the inside of the conduit and when the rotary arm 200 is pressed, it is compressed by elasticity to shorten the length of the rotary arm 200, and the distance to the inside of the conduit. It may be made of a spring part whose length is increased by elasticity when . In this case, the length adjusting unit 25 is configured so that the lengths of the needle scaler 21 and the guide roller 23 can be precisely in close contact with the inside of the pipe even when the shape of the inside of the pipe is uneven or the distance to the inside of the pipe is getting shorter. The length of the rotary arm 200 can be adjusted. In one embodiment, the flow distance of the spring part may be made of 10 cm. Therefore, even if the inner diameter of the conduit is deformed by 20 cm by the length adjusting unit 25 installed on the first arm 200_1 and the second arm 200_2, the needle scaler 21 can be closely adhered to the inside of the conduit.

For example, the guide roller 23_1 of the first arm 200_1 is in contact with the inner surface of the conduit, and the length adjusting part 25_1 of the first arm 200_1 is the guide roller 23_1 of the first arm 200_1. ) can be compressed by the pressure and the length can be adjusted. Since the needle scaler 21_1 of the first arm 200_1 is spaced apart from the guide roller 23_1 of the first arm 200_1 and is installed to be slightly shorter than the guide roller 23_1, it is shorter than the length of the guide roller 23_1. The length can be adjusted by position.

Similarly, the guide roller 23_2 of the second arm 200_2 is in contact with the inner surface of the conduit, and the length adjusting part 25_2 of the second arm 200_2 is the pressure of the guide roller 23_2 of the second arm 200_2. It is compressed by the , and the length can be adjusted. Since the needle scaler 21_2 of the second arm 200_2 is spaced apart from the guide roller 23_2 of the second arm 200_2 and is installed to be slightly shorter than the guide roller 23_2, the length of the guide roller 23_2 is shorter than the length of the needle scaler 21_2. The length can be adjusted by position.

Accordingly, in the coating film removal apparatus 1000 according to an embodiment of the present invention, the length of the rotary arm 200 is adjusted so that the needle scaler 21 can remove the coating film at an appropriate distance without damaging the inner surface of the pipeline. There are advantages.

Hereinafter, a rotary joint according to another embodiment of the present invention will be described.

The rotary joint according to the present embodiment may be installed in a coating film removal device that removes a coating film from a pipeline using a needle scaler of a rotary arm and a guide roller guiding the needle scaler.

The rotary joint may couple the central axis of the film removal device and the rotary arm. The rotary joint may include a fixed joint and a rotary joint. The fixed joint may be connected to the central axis to be fixed, and the rotary joint may be connected to the rotary arm.

In the rotary joint, an air path through which air input through the fixed joint passes to the rotary joint and an electric path through which electric power input through the fixed joint passes through the rotary joint may be formed. The fixed joint may be formed with an input portion into which an air path and an electric path are input. The rotation joint may be formed with an air path and an electric path discharge unit connected to the rotation unit.

In one embodiment, the air path may be a path through which air is discharged through the needle scaler connected from the central axis to the needle scaler through the center of the rotating body.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can realize that the present invention can be embodied in other specific forms without changing its technical spirit or essential features. can understand Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

Claims (20)

In the coating film removal device for removing the coating film of the pipeline,
body part;
a rotating arm rotating based on a rotating shaft coupled to the central axis of the main body;
a needle scaler coupled to one end of the rotary arm to remove the coating film; and
Including a guide roller coupled to one end of the rotary arm spaced apart from the needle scaler, and guiding the needle scaler while moving along the inside of the conduit,
film removal device. According to claim 1,
Further comprising a rotary joint for coupling the rotary shaft and the central shaft of the rotary arm,
film removal device. 3. The method of claim 2,
The rotary joint is
Comprising a fixed joint connected to the central axis and fixed and a rotating joint connected to the rotating arm,
film removal device. 4. The method of claim 3,
The rotary joint is
It is coupled between the fixed joint and the rotary joint comprising a conductor portion through which current flows in a liquid state,
film removal device. 4. The method of claim 3,
The rotary joint is
An air path through which the air input through the fixed joint passes to the rotary joint and an electric path through which the electric power input through the fixed joint passes through the rotary joint are formed,
film removal device. 6. The method of claim 5,
The air pass is
It is a path through which air is discharged through the needle scaler connected to the needle scaler from the central axis through the center of the rotating body,
film removal device. 6. The method of claim 5,
The fixed joint is
An input portion to which the air path and the electric path are input is formed,
film removal device. 6. The method of claim 5,
The rotary joint is
The air path and the electric path are formed with a discharge part connected to the rotating part,
film removal device. According to claim 1,
Further comprising a length adjusting unit for adjusting the length of the rotary arm to the inner surface of the conduit,
film removal device. 10. The method of claim 9,
The length adjustment unit,
When the rotary arm is pressed into contact with the inside of the conduit, the length of the rotary arm is shortened by being compressed by elasticity, and when the distance to the inside of the conduit increases, the length of the rotary arm is increased by elasticity.
film removal device. According to claim 1,
The rotary arm is
A first arm facing a first direction and a second arm facing a second direction,
film removal device. According to claim 1,
The needle scaler,
At least one needle is in contact with the inside of the conduit, and the at least one needle transfers vibration generated using rotational energy of a motor to the paint film of the conduit to remove the paint film,
film removal device. According to claim 1,
The body part,
It proceeds in the direction of the work to remove the coating film,
film removal device. According to claim 1,
The body part,
Containing a universal motor connected to the rotating shaft and a chain to rotate the rotating shaft,
film removal device. 15. The method of claim 14,
The body part,
That the universal motor proceeds in the working direction of removing the coating film based on the speed at which the rotating shaft rotates,
film removal device. fixed joint; and
It includes a rotary joint connected to the fixed joint,
It is installed in the coating film removal device that removes the coating film of the pipeline using the needle scaler of the rotary arm and the guide roller that guides the needle scaler,
coupling the central axis of the coating film removal device and the rotating shaft of the rotary arm;
The fixed joint is connected to the central axis of the film removal device,
The rotary joint is connected to the rotary shaft of the rotary arm,
rotary joint. 17. The method of claim 16,
An air path through which the air input through the fixed joint passes to the rotary joint and an electric path through which the electric power input through the fixed joint passes through the rotary joint are formed,
rotary joint. 18. The method of claim 17,
The air pass is
It is a path through which air is discharged through the needle scaler connected to the needle scaler from the central axis through the center of the rotating body,
rotary joint. 18. The method of claim 17,
The fixed joint is
An input portion to which the air path and the electric path are input is formed,
rotary joint. 18. The method of claim 17,
The rotary joint is
The air path and the electric path are formed with a discharge part connected to the rotating part,
rotary joint.

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