KR20230052403A - A device for polishing the inner circumferential surface of a pipe using centrifugal force - Google Patents

Abstract

The present invention relates to a device for polishing the inner circumferential surface of a pipe by using centrifugal force, and more specifically, to a device for polishing the inner circumferential surface of a pipe by using centrifugal force, which allows a plurality of brushes to be rotated to widen a working range to improve efficiency in work, and uses centrifugal force according to rotation such that the brushes may be pressurized against the inner circumferential surface of the pipe, thereby performing an effective polishing process. To this end, provided is a device for polishing the inner circumferential surface of a pipe by using centrifugal force, which comprises: a main connector which is provided to be rotated after being axially coupled to a rotating device generating rotating force; a holder which is provided to be attached to and detached from the main connector, is rotated in a circumferential direction according to the rotation of the main connector, and is provided with a hollow moving space; a gripper which is installed to be moved along the moving space of the holder, and is composed of a moving unit located at the moving space and a coupling unit exposed to the outside of the holder from the moving space, while comprising a first stopper formed at the moving unit to prevent the moving unit from being dislocated to the outside of the holder, and a second stopper preventing the coupling unit from being inserted into the moving space; and a brush which is provided to be attached to and detached from the coupling unit of the gripper.

Description

A device for polishing the inner circumferential surface of a pipe using centrifugal force}

The present invention relates to an apparatus for polishing the inner circumferential surface of a pipe using centrifugal force, and more particularly, by rotating a plurality of brushes in a circumferential direction to generate centrifugal force while polishing the inner circumferential surface of the pipe using centrifugal force. It's about polishing equipment.

The abrasive brush is used to remove foreign substances such as aged paint or rust painted on the surface of various products or to polish the surface of metal while rotating while being coupled to a grinder. As shown in FIG. 1, the abrasive brush generally includes a grinding wire 1 in which a plurality of iron wires are densely distributed, a wire rod coupling cap 4 into which the grinding wire 1 is inserted and bound, and a grinder. It consists of a brush body 2 composed of a shaft rod 5 for coupling. After inserting the wire rod 1 for grinding into the wire rod coupling cap 4, the wire rod coupling cap 4 is pressed or bent inward for grinding. Bind the molten wire (1) to the wire rod coupling cap. As the grinding wire 1 bound to the wire rod coupling cap 4 is pressed to the metal surface at a constant pressure and polishing is performed, the grinding wire 1 made up of a plurality of iron wires is more than necessary in the grinding work process. Since it can be spread widely, in order to prevent this, a fixed coil 3 is formed by winding a wire around the wire 1 for grinding a certain number of times.

The polishing operation using the abrasive brush described above is performed by connecting the shaft rod 5 for grinder coupling to a rotating device such as a hand grinder, operating the rotating device to rotate the abrasive brush, and pressing the rotating abrasive brush to the surface to be polished. work is done

However, since the polishing work using the conventional abrasive brush described above requires the operator to hold and control the rotating device directly, concentration due to continuous repetitive work may decrease, which may cause safety accidents and cause musculoskeletal disorders. there is In addition, since manual work using a conventional abrasive brush is close to the work distance from the polishing target, dust generated during the polishing work may be inhaled into the respiratory tract of the worker, and there is a problem of contaminating the skin and work clothes. In particular, manual work using conventional abrasive brushes may be exposed to external and internal exposure during decontamination of radioactive contaminants. There is a problem in that decontamination is virtually impossible because there is no way to form frictional force by compression. In addition, in the work for polishing the inner circumferential surface of the pipe, when the operator cannot be put into the pipe, the polishing work is inconvenient.

Republic of Korea Utility Model Registration No. 20-0402485

The present invention has been made to solve the above problems, and an object of the present invention is to polish the inner circumferential surface of the pipe using centrifugal force so that the polishing operation on the inner circumferential surface of the pipe can be effectively performed from a distance using the centrifugal force according to the rotation of a plurality of brushes. It is intended to provide a device.

In order to solve the above problems, the present invention provides a main connector that is axially coupled to a rotating device that generates rotational force and can be rotated; a holder detachably attached to the main connector, rotated in a circumferential direction according to rotation of the main connector, and having a hollow moving space; It is installed to be movable along the moving space of the holder and is composed of a moving part located in the moving space and a coupling part exposed to the outside of the holder from the moving space, and formed in the moving part to prevent the moving part from escaping from the holder. a gripper including a first stopper to prevent and a second stopper to prevent the engaging part from being drawn into the moving space; and a polishing device for inner circumference of a pipe using centrifugal force including a brush provided to be detachable from the coupling part of the gripper.

At this time, it is preferable that the holder is installed in plurality along the circumference of the main connector.

In addition, it is preferable that the movement distance of the gripper in the movement space corresponds to the distance between the first stopper and the second stopper.

In addition, it is preferable that the coupling part is configured so that weight caps of various weights can be coupled through coupling means.

At this time, the coupling portion forms an insertion groove having a cut opening, the weight cap is provided to be screwed into the coupling portion, and forms a hollow insertion boss communicating with the insertion groove, and the brush is the insertion boss It is preferable to form a shaft rod inserted into the insertion groove through, so that the screw coupling of the weight cap tightens the opening so that the shaft rod can be fixed in the insertion groove.

The apparatus for polishing the inner circumferential surface of a pipe using centrifugal force according to the present invention has an effect of increasing work efficiency by increasing a working range by polishing the inner circumferential surface of a pipe while rotating a plurality of brushes.

In addition, since the present invention can perform remote grinding work through remote manipulation of the rotating machine, it is possible to prevent damage due to dust generated during work, and to prevent musculoskeletal disorders due to repetitive work by workers. It works.

In addition, since the present invention can maximize the force by which the brush is pressed against the inner circumferential surface of the pipe using the weight cap, there is an effect of increasing the efficiency of the polishing operation.

1 is a view showing an abrasive brush.
2 is a view showing an apparatus for polishing the inner circumferential surface of a pipe using centrifugal force according to a preferred embodiment of the present invention.
Figure 3 is an exploded view showing the main part of the polishing device for the inner circumferential surface of the pipe using centrifugal force according to a preferred embodiment of the present invention.
Figure 4 is a view showing the main part of the polishing device for the inner circumferential surface of the pipe using centrifugal force according to a preferred embodiment of the present invention.
5A and 5B are cross-sectional views showing main parts of an apparatus for polishing the inner circumferential surface of a pipe using centrifugal force according to a preferred embodiment of the present invention.
6A and 6B are views showing a state in which the polishing device for inner circumferential surface of a pipe using centrifugal force according to a preferred embodiment of the present invention acts on the inner circumferential surface of the pipe.

The terms or words used in this specification and claims are not limited to the usual or dictionary meanings, and the inventor can properly define the concept of the term in order to explain his or her invention in the best way. Based on this, it should be interpreted as a meaning and concept consistent with the technical spirit of the present invention.

Hereinafter, an apparatus for polishing the inner circumferential surface of a pipe using centrifugal force according to a preferred embodiment of the present invention will be described with reference to FIGS. 2 to 6B attached thereto (hereinafter referred to as 'polishing apparatus').

The polishing device rotates a plurality of brushes in the circumferential direction through a rotary device to widen the polishing work range to increase work efficiency, and to prevent damage caused by dust generated during work through remote control. In addition, the polishing device can increase the efficiency of the polishing operation by maximizing the force by which the brush is pressed against the inner circumferential surface of the pipe using the centrifugal force generated when the brush rotates.

As shown in FIGS. 2 and 3 , the polishing device includes a main connector 100 , a holder 200 , a gripper 300 , a weight cap 400 , and a brush 500 .

The main connector 100 constitutes the center of the polishing device and serves to generate centrifugal force in the gripper 300 through rotation. The main connector 100 is provided so that the holder 200 can be installed on all sides, and a shaft hole 110 for shaft coupling with a rotating device (not shown) is formed at the center. At this time, the rotating device is not limited to a specific device, and any device capable of rotating the main connector 100 at high speed may be used. As shown in FIG. 4 , screw grooves 120 for coupling with the holder 200 are formed at each end of the main connector 100 extending in all directions. It is preferable that the number of ends extending in all directions of the main connector 100 is plural, and in this specification, for convenience of description, four is taken as an example.

The holder 200 serves to control the rotation range of the polishing device while moving the gripper 300 to which the brush 500 is coupled by the centrifugal force generated through the main connector 100. The holder 200 includes a threaded portion 210 that can be screwed into the threaded groove 120 of the main connector 100, and forms a hollow movement space 220 for the movement of the gripper 300. do. As shown in FIGS. 3 and 4 , the holder 200 has a threaded portion 210 provided at one end and an opening 230 for moving the gripper 300 at the other end.

The gripper 300 has a configuration to which the brush 500 is coupled, and is provided to reciprocate along the movement space 220 of the holder 200. The outer diameter of the gripper 300 is formed smaller than the inner diameter of the holder 200, and the holder 200 passes through the moving part 310 located in the moving space 220 and the opening hole 230 of the holder 200. It consists of a coupling portion 320 exposed to the outside. At this time, when the moving part 310 is moved along the moving space 220, the moving part 310 prevents the moving part 310 from completely coming out of the holder 200 through the opening hole 230. 1 stopper 330 is formed. The first stopper 330 is formed along the circumference of the moving part 310, and the diameter of the first stopper 330 is smaller than the inner diameter of the moving space 220 and smaller than the diameter of the opening 230. is formed large. In addition, a support 340 for holding the center of the gripper 300 is formed at the end of the moving unit 310, and the support 340 works together with the first stopper 330 to center the gripper 300. coincides with the axial center of the holder 200 to prevent a large gap between the moving part 310 and the holder 200. When the outer diameters of the support 340 and the first stopper 330 are not significantly different from the inner diameter of the holder 200, the effect of aligning the shaft center is greater. The support 340 is formed in a circular shape along the circumference of the end of the moving part 310 .

On the other hand, the coupling portion 320 of the gripper 300 is configured to be coupled to the brush 500, and forms an insertion groove 321 for coupling with the brush 500. At this time, the front end of the insertion groove 321 may be cut in plurality to open or close the entrance of the insertion groove 321 . In addition, a screw thread for screw coupling with the weight cap 400 to be described later is formed on the outer circumferential surface of the coupling part 320 . In addition, a second stopper 350 is formed at the coupling portion 320 to prevent the coupling portion 320 from being completely drawn into the moving space 220 . When the gripper 300 moves along the movement space 220, the second stopper 350 prevents the coupling part 320 from entering the movement space 220 through the opening hole 230, and the opening hole ( 230) is formed in a circular shape with a larger diameter than that of The first stopper 330 and the second stopper 350 are disposed on both sides with the opening 230 interposed therebetween, and the distance between the first stopper 330 and the second stopper 350 is the gripper 300 It can be seen that it corresponds to the moving distance of Meanwhile, as shown in FIGS. 3 and 5B , an anti-rotation bar 360 and a rail groove 240 for preventing rotation of the gripper 300 when the gripper 300 moves in the moving space 220 of the holder 200 ) is provided. The anti-rotation bar 360 protrudes from the outer circumferential surface of the moving part 310 between the first stopper 330 and the second stopper 350, and the rail groove 240 has a concave groove on a part of the inner circumferential surface of the opening 230. made in the form That is, the anti-rotation bar 360 slides along the rail groove 240, guides the movement path of the gripper 300, and rotates in the movement space 220 when the gripper 300 moves. that can be prevented.

The weight cap 400 serves to maximize the centrifugal force along with the role of coupling the brush 500 to the coupling part 320 . In addition, the weight cap 400 serves to maintain the position of the moving unit 310 when the moving unit 310 moves along the moving space 220 by centrifugal force. That is, the weight cap 400 adds force by which the brush 500 is in close contact with the inner circumferential surface of the pipe by centrifugal force so that a compressive force is generated on the inner circumferential surface of the pipe rather than simple adhesion, thereby increasing the efficiency of the polishing operation. The weight cap 400 may be provided in various types having various weights, and forms an insertion boss 410 for insertion of the brush 500 and screw coupling with the coupling portion 320 . A thread for screwing with the coupling part 320 is formed on the inner circumferential surface of the insert boss 410 .

The brush 500 is a part that adheres to the inner circumferential surface of the pipe and actually performs the polishing operation, and has a metal wire for grinding. At this time, the shaft rod 510 for coupling with the coupling part 320 is formed on the brush 500 . The shaft rod 510 is configured to be inserted into the insertion groove 321 of the coupling part 320 through the insertion boss 410 of the weight cap 400, and is formed to have a smaller outer diameter than the inner diameter of the insertion boss 410. .

Hereinafter, the coupling and polishing action of the polishing device configured as described above will be described.

The gripper 300 is inserted and positioned in the moving space 220 of the holder 200. At this time, the first stopper 330 and the second stopper 350 are positioned with the opening 230 of the holder 200 interposed therebetween, and the anti-rotation bar 360 is positioned in the rail groove 240 . Accordingly, the gripper 300 can reciprocate by the distance between the first stopper 330 and the second stopper 350 .

Next, the operator inserts the shaft rod 510 of the brush 500 through the insertion boss 410 of the weight cap 400 and inserts it into the insertion groove 321 of the coupling part 320. At this time, the shaft rod 510 can be freely inserted into the insertion groove 321 by the tip of the cut insertion groove 321. Next, the operator screws the weight cap 400 to the coupling part 320 . At this time, as the coupling part 320 is tightened by screwing of the weight cap 400, the shaft rod 510 of the brush 500 can be more firmly fixed. Through such a series of processes, a polishing device is prepared as shown in FIG. 2 .

Next, the operator shaft-couples the rotary device to the shaft hole 110 of the main connector 100, and places it in the center of the inside of the pipe as shown in FIG. 6A. At this time, since the gripper 300 is in a state before moving in the moving space 220, it can be understood that the radius of rotation of the polishing device is smaller than the inner diameter of the pipe. That is, the polishing device can be easily positioned inside the pipe. Of course, the gripper 300 located below the main connector 100 naturally moves in the moving space 220 by the load, so that the brush 500 comes into contact with the inner circumferential surface of the pipe.

Next, the operator rotates the main connector 100 at high speed by operating a rotating device. The gripper 300 moves along the movement space 220 by generating centrifugal force by the high-speed rotation of the main connector 100, thereby bringing the brush 500 into close contact with the inner circumferential surface of the pipe, as shown in FIG. 6B. In detail, the moving part 310 of the gripper 300 moves along the moving space 220 while generating centrifugal force to push the brush 500 out of the holder 200, and the first stopper 330 is the opening hole. The moving distance of the moving unit 310 is limited according to the hanging around the 230 . At this time, before the first stopper 330 is caught around the opening 230, the moving distance of the moving part 310 may be limited by pressing the brush 500 to the inner circumferential surface of the pipe. That is, the moving distance of the moving unit 310 is not necessarily limited only by the first stopper 330 .

On the other hand, as the brush 500 in close contact with the inner circumferential surface of the pipe generates a compressive force toward the inner circumferential surface of the pipe by the weight of the weight cap 400, more effective smoke work is performed.

As described above, the apparatus for polishing the inner circumferential surface of a pipe using centrifugal force according to the present invention can expand the working radius through the movement of the brush using centrifugal force, and as a plurality of brushes rotate inside the pipe to perform polishing work, It can increase work efficiency. In addition, since the present invention allows a worker to perform a polishing operation through remote control of a rotating machine from a distance, damage caused by dust or the like generated during the polishing operation can be prevented.

Although the present invention has been described in detail with respect to the described embodiments, it is obvious to those skilled in the art that various changes and modifications are possible within the scope of the technical spirit of the present invention, and these changes and modifications belong to the appended claims.

100: main connector 110: shaft hole
120: screw groove 200: holder
210: screw part 220: moving space
230: opening hole 240: rail groove
300: gripper 310: moving unit
320: coupling part 321: insertion groove
330: first stopper 340: support
350: second stopper 360: anti-rotation bar
400: weight cap 410: insertion boss
500: brush 510: shaft rod

Claims (5)

A main connector provided so as to be axially coupled to a rotating device that generates rotational force and rotated;
a holder detachably attached to the main connector, rotated in a circumferential direction according to rotation of the main connector, and having a hollow moving space;
It is installed to be movable along the moving space of the holder and is composed of a moving part located in the moving space and a coupling part exposed to the outside of the holder from the moving space, and formed in the moving part to prevent the moving part from escaping from the holder. a gripper including a first stopper to prevent and a second stopper to prevent the engaging part from being drawn into the moving space; and
An apparatus for polishing the inner circumferential surface of a pipe using centrifugal force including a brush provided to be detachable from the coupling part of the gripper. According to claim 1,
The inner circumference polishing device of the pipe using centrifugal force, characterized in that the holder is installed in plurality along the circumference of the main connector. According to claim 1 or 2,
The gripper movement distance in the movement space corresponds to the distance between the first stopper and the second stopper. According to claim 1 or 2,
The inner circumferential polishing device of the pipe using centrifugal force, characterized in that the coupling portion is configured to be coupled to a weight cap of various weights through a coupling means. According to claim 4,
The coupling portion forms an insertion groove having a cut opening, the weight cap is provided to be screwed into the coupling portion, and forms a hollow insertion boss communicating with the insertion groove, and the brush is inserted through the insertion boss. By forming a shaft rod inserted into the insertion groove,
The inner circumferential polishing device of the pipe using centrifugal force, characterized in that the screw coupling of the weight cap tightens the opening so that the shaft rod can be fixed in the insertion groove.

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