JP2003181755A - Piping polishing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piping polishing device which easily polishes piping surfaces of fixed piping, handrails with vertical bars, and the like to get a uniform quality, facilitates a polishing operation, and prevents polishing dusts from flying. <P>SOLUTION: The piping polishing device 10 is constituted of openable and closable dust covers 28 and 29, polishing wheels 14, 16 and 18, etc. Driving force from a drive unit 12 is transmitted to the polishing wheels 16 and 18 through transmission gears 20 and 22, and timing belts 24 and 26. The polishing wheel 18 receives the driving force in a reverse direction to the other polishing wheels 14 and 16. Piping 60 is polished in such a manner that the polishing wheels 14, 16 and 18 are driven, while a dust collector 100 is sucking dust air in an upper cover 27 and the dust covers 28 and 29. An entire periphery of the piping 60 can be polished if an operator rocks the piping polishing device 10 left and right with the piping 60 as a center. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe polishing device, and more particularly to a pipe polishing device for polishing a welded joint in pipe processing.

[0002]

2. Description of the Related Art Conventionally, welding has generally been used as a joining method for pipes used as structural materials. Prior to welding and joining, in order to prevent deterioration of welding quality, polishing work around the joint is performed for the purpose of removing dirt, oil and fat, rust and the like at the welded portion. In addition, when pipes such as water pipes of non-polluting substances are welded and joined at a construction site, the welded joints are often inspected by nondestructive inspection after the welded joints. Particularly, in the penetrant flaw detection test for inspecting minute holes and cracks on the surface of the welded joint, it is necessary to remove the irregularities of the weld overlay, and therefore polishing work of the welded joint is performed as pre-inspection processing. In addition, safety fences and handrails composed of piping are widely used in inspection corridors of chemical plants and power plants, so that people will not be injured when walking while holding their hands. It is required to polish the welded joint smoothly.

[0003] It is a difficult task that requires skill when polishing these welded joints on a pipe that has already been constructed and fixed. Furthermore, when using a hand grinder or belt sander, polishing dust is scattered and dust air is generated.

On the other hand, in the polishing device for the end portion of the pipe joint disclosed in Japanese Patent Laid-Open No. 9-17848, there is proposed a device for pressing the polishing device against the end portion of the pipe and rotating the pipe to polish the surface of the pipe. It is useful for processing material piping at construction sites.

Further, in the automatic polishing apparatus for pipe joints disclosed in Japanese Patent Application Laid-Open No. 7-60634, a polishing device having a polishing wheel inside which is driven to rotate along the surface of the pipe is used to remove welded joints of pipes. We are carrying out polishing work.

Further, another conventional pipe polishing device 9 is shown in FIG.
8 is shown. This pipe polishing device 98 has a polishing wheel 97.
The operator operates the pipe polishing device 98 to perform rotary polishing on the welded joint portion 96 of the pipe 90.

[0007]

However, in the conventional pipe polishing apparatus as described above, Japanese Patent Application Laid-Open No. 9-11784 has been proposed.
In the case of the polishing apparatus as disclosed in Japanese Patent Publication No. 8, since the pipe itself needs to be rotated, it cannot be used for fixed pipes or safety fences already installed, and when the pipe end is not exposed. Had the drawback of not being able to mount the device.

Further, in the polishing apparatus as disclosed in Japanese Patent Application Laid-Open No. 7-60634, since the polishing apparatus is driven to rotate along the surface of the pipe, it is necessary to equip the polishing apparatus with a motor and a speed reduction mechanism that give a sufficient torque. There is a problem that polishing work is time-consuming because the size itself becomes large.

Further, as shown in FIG. 6, since a vertical bar 92 is attached to the pipe 90 in a vertical direction from a floor 94 or the like, the pipe polishing device 98 is completely attached to the welded joint portion 96 of the pipe 90. There is a drawback that it is difficult to perform circumferential polishing, and therefore, there are some portions that cannot be polished.

The present invention has been made in view of the above circumstances, and the surface of a fixed pipe and the surface of a pipe such as a handrail having a vertical bar can be easily and uniformly polished to facilitate the polishing work. An object of the present invention is to provide a pipe polishing device which can be carried out and which prevents scattering of polishing dust.

[0011]

In order to achieve the above object, the invention according to claim 1 is a device main body capable of enclosing an outer periphery of a pipe, the device main body being rotatably provided, and the device. At least two or more polishing wheels, which are pressed against the outer peripheral portion of the pipe when the main body is surrounded by the pipe, a rotary drive source provided in the main body of the apparatus, and a rotational force from the rotary drive source to the two or more rotary wheels. And a rotational force transmitting means for transmitting the rotational forces of the polishing wheels so that the rotational directions of the polishing wheels are opposite to each other.

According to the present invention, by providing a plurality of polishing wheels, it is possible to polish the entire circumference of the piping surface of the piping by rotating the apparatus body around the piping axis by a predetermined angle. In addition, by rotating some polishing wheels in the opposite direction to other polishing wheels, the rotational force around the pipe acting on the device body is reduced, and the operator can swing the device body with a light force. it can.

According to the second aspect of the present invention, since the dustproof cover is provided near the polishing wheel of the pipe polishing device, and the dustproof device is connected to the dustproof cover,
It is possible to easily collect the polishing dust.

Furthermore, according to the third aspect of the present invention, since a guide member for guiding the device body of the pipe polishing device about the axis of the pipe is provided, the device body can be smoothly moved around the pipe axis. It can be rotated.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a pipe polishing apparatus according to the present invention will be described below with reference to the accompanying drawings.

The pipe polishing apparatus 10 of the embodiment shown in FIG.
Is composed of a drive device 12 as a rotary drive source, a holding mechanism 70, polishing wheels 14, 16, 18 and the like,
The polishing wheels 14, 16 and 18 are covered with an upper cover 27 and dustproof covers 28 and 29 which form the main body of the apparatus. A suction duct 102 is provided in the upper cover 27, and dust air can be sucked by the dust suction device 100.

In FIG. 1, the drive unit 12 is an air motor which generates a driving force by compressed air, and the compressed air is supplied to the drive unit 12 from an air pump (not shown) through the pipe 13 to thereby form a spindle 30 of the drive unit 12. Is rotated at high speed. As a result, the polishing wheel 14 provided on the spindle 30 can be driven.

In FIG. 3, the drive gear 32, the transmission gears 20, 22, the timing belts 24, 26, and the timing gears 38, 40, which constitute the rotational force transmission means, are provided near the polishing wheel 14. A drive gear 32 is provided on the spindle 30, and the drive force of the drive device 12 is transmitted to the transmission gears 20 and 22 by meshing with the transmission gears 20 and 22 provided near the drive device 12. Transmission gear 20,
One of the endless timing belts 24 and 26 is wound around 22, and the other is attached to the dust cover 2 described later.
Timing gear 3 provided on shafts 34 and 36 of 8 and 29
It is wound around 8 and 40 and stretched.

The shafts 34 and 36 have polishing wheels 16 and 18, respectively.
Therefore, the driving force from the driving device 12 transmitted to the transmission gears 20 and 22 is
4 and 26 are transmitted to the timing gears 38 and 40,
It is transmitted to the polishing wheels 16 and 18. Due to the structure of the rotational force transmitting means as described above, the polishing wheel 18 receives a driving force in a direction (arrow D) opposite to the rotational directions (arrows B and C) of the other polishing wheels 14 and 16.

In FIG. 2, an opening / closing screw 62 is screwed into an opening / closing member 58 provided above the upper cover 27, and the lower end of the opening / closing screw 62 is rotatably supported by the upper cover 27. Shafts 42 and 44 are provided on the upper cover 27, and dustproof covers 28 and 29 are rotatably supported by the upper cover 27. Further, the shafts 46, 4 are provided in the center of the dustproof covers 28, 29.
8 is provided, and one of the links 50 and 52 is rotatably supported. Further, the other ends of the links 50 and 52 are pivotally supported by shafts 54 and 56 provided on the opening / closing member 58. Below the dustproof covers 28 and 29, the shafts 34 and 3 described above are provided.
6 is provided to rotatably support the polishing wheels 16 and 18. Upper cover 27 and dustproof covers 28, 29
By covering the polishing wheels 14, 16 and 18 with
The scattering of polishing debris from the polishing wheels 14, 16 and 18 is prevented. Further, the suction duct 10 is provided on the upper cover 27.
2 is provided so that the dust suction device 100 can suck the dust air in the upper cover 27 and the dustproof covers 28 and 29 (see FIG. 1).

In FIG. 1, the drive unit 12 is held in the pipe 60 by a holding mechanism 70. This holding mechanism 7
Details of 0 are shown in FIG. Here, FIG. 4 is a sectional view taken along the arrow E of FIG.

The holding mechanism 70 is composed of a mounting member 72, link members 74 and 76, adjusting screws 78, guide members 80 and 82, and the like.

The mounting member 72 has a clamp-like structure, and the holding mechanism 70 is fixed to a predetermined position of the drive unit 12 by tightening a fixing screw 85. Further, the attachment member 72 is provided with shafts 86 and 88, and the link member 7
4, 76 are rotatably supported by shafts 86, 88.
Guide members 80 and 82 are provided below the link members 74 and 76, and are rotatably supported via shafts 81 and 83. The guide members 80 and 82 have rolling elements 80a and 82a therein, and the rolling elements 80a and 82a are installed in the pipe 60.
a and 82a are brought into contact with each other, the link members 74 and 76
Is smoothly rotated around the pipe 60.

The adjusting screw 7 is provided above the link members 74 and 76.
8 is installed. The adjusting screw 78 sandwiches the spring 84, and the screw holes 74 provided in the upper portions of the link members 74 and 76 are provided.
It is screwed into a and 76a. The screw holes 74a and 76a are formed with screws having different directions, and when the adjusting screw 78 is rotated, the guide members 80 and 82 can be opened and closed with the shafts 86 and 88 as fulcrums. The pipe 82 is removable from the pipe 60.

Since the holding mechanism 70 has the above-described structure, the drive device 12 can be rotatably held between the pipe 60 and can be freely attached and detached.

The operation of the pipe polishing device 10 configured as described above will be described.

First, as shown in FIG. 5, the opening / closing screw 62 is operated to open the dustproof covers 28 and 29. By rotating the open / close screw 62, the open / close member 58 moves up and down with respect to the open / close screw 62, and the dustproof covers 28, 29 pivotally supported by the shafts 42, 44 provided on the upper cover 27 are connected via the links 50, 52. Can be opened and closed. After opening the dustproof covers 28 and 29, bring the polishing wheel 14 into contact with the upper portion of the pipe 60,
Operate the open / close screw 62 (arrow F) to remove the dust covers 28, 2
9 is closed (arrow G). At this time, the polishing wheels 16 and 1
The opening / closing screw 62 is operated until 8 comes into contact with the pipe 60, and the pressing degree of the polishing wheel is also adjusted by the opening / closing screw 62. As a result, the pipe polishing device 1 is attached to the pipe 60.
You can wear 0. Also, the polishing wheel 14,
Since 16 and 18 are configured as described above, they can be mounted on pipes having different pipe diameters.

Next, as shown in FIG. 4, the adjusting screw 78 of the holding mechanism 70 is operated to open the link members 74 and 76. At this time, the guide members 80, 82 can be opened by rotating the link members 74, 76 in the direction in which they are closed with respect to the spring 84. The pipe 60 is brought close to the guide members 80 and 82, and the adjusting screw 78 is loosened so that the guide members 80 and 82 are clamped by the pipe 60. As a result, the drive device 12 is mounted on the pipe 60 so as to be rotatable and movable. Here, since a large drive device is not provided, the work of mounting the drive device 12 on the pipe 60 becomes easy. Further, since the link members 74 and 76 are constantly urged by the spring 84, the adjusting screw 78
Does not come loose.

As described above, the pipe polishing device 1 is attached to the pipe 60.
After mounting 0, the drive device 12 and the dust suction device 100 are driven. While sucking the dust air in the upper cover 27 and the dustproof covers 28 and 29 by the dust suction device 100, the polishing wheel 14 is driven, and the driving force is transmitted to the polishing wheels 16 and 18 to polish the pipe 60. As a result, the pipe 60 is simultaneously polished by the polishing wheels 14, 16 and 18, so that it is polished with uniform quality.

As shown in FIG. 2 while driving the drive unit 12, an operator swings the pipe polishing device 10 left and right around the pipe 60 (arrow H) to polish the welded joint of the pipe 60. To do. Here, since the polishing wheel 18 and the polishing wheels 14 and 16 rotate in opposite directions, which are opposite to each other, the polishing directions are mixed in both forward and reverse directions. As a result, as compared with the case where the polishing wheels are all in the same rotation direction, the rotational force around the pipe acting on the pipe polishing device 10 is reduced, and therefore the worker swings the pipe polishing device 10 with a light force. can do. If the pipe polishing device 10 is swung about the pipe 60, the three polishing wheels 14, 16 and 18 are arranged at intervals, so that the main body of the device can be rotated by a predetermined angle around the pipe axis. Therefore, it is possible to apply the polishing wheel to the entire circumference of the pipe 60. At this time, it is possible to polish the entire surface of the fixed pipe and the pipe such as a handrail having a vertical rail. Further, the holding mechanism 70 allows the main body of the apparatus to be smoothly rotated around the pipe axis. Further, although polishing dust is generated from the polishing wheels 14, 16 and 18, the upper cover 27 and the dust cover 2 are removed by the dust suction device 100.
The dust air in 8, 29 can be sucked in, polishing debris can be easily collected, and the working environment is greatly improved.
Further, since the pipe polishing device 10 can be adjusted not only around the pipe but also in the pipe axial direction, it can be easily moved to a position where it does not interfere with the vertical rail of the safety fence, and the polishing work can be performed. Can be done easily.

The pipe polishing apparatus according to the present invention described above is not limited to the above embodiment. For example, although three polishing wheels are provided in the present embodiment, the present invention is not limited to this, and at least two or more polishing wheels may be arranged so that they can be rotationally polished. in this case,
By changing the swing angle of the pipe polishing device 10 in accordance with the distance between the arranged polishing wheels, the polishing wheel can be applied to the entire circumference of the pipe 60, and the entire circumference can be polished.

Further, in the present embodiment, an air motor which gives a driving force by compressed air is used as the drive unit 12, but the present invention is not limited to this, and an AC motor may be used. In this case, a separately provided compressed air blowing means is unnecessary.

[0033]

As described above in detail, according to the pipe polishing apparatus of the present invention, since a plurality of polishing wheels are provided,
The entire circumference of the pipe can be polished simply by rotating the main body of the device about the pipe axis by a predetermined angle, and the surface of the pipe such as a handrail with a vertical crosspiece can be easily polished with uniform quality. In addition, by rotating some polishing wheels in the opposite direction to other polishing wheels, the rotational force around the pipe acting on the device body is reduced, and the operator can swing the device body with a light force. it can.

Further, since the dustproof cover is provided in the vicinity of each polishing wheel and the dust collecting device for the polishing dust is provided, the polishing dust can be easily collected and the working environment is greatly improved. Further, since the guide member for guiding the device main body to rotate about the pipe axis is provided, the device main body can be smoothly rotated about the pipe axis. It can also be used for different pipe diameters.

[Brief description of drawings]

FIG. 1 is a side view showing a pipe polishing device according to an embodiment of the present invention.

FIG. 2 is a front view showing a pipe polishing device according to an embodiment of the present invention.

FIG. 3 is a sectional view showing a pipe polishing device according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a holding mechanism of a drive device of a pipe polishing device according to an embodiment of the present invention.

FIG. 5 is a front view showing the operation of the dustproof cover of the pipe polishing device according to the embodiment of the present invention.

FIG. 6 is a side view showing a pipe polishing device as a conventional technique.

[Explanation of symbols]

10 ... Pipe polishing device, 12 ... Drive device (rotational drive source),
14, 16, 18 ... Polishing wheel, 20, 22 ... Transmission gear (rotational force transmission means), 24, 26 ... Timing belt (rotational force transmission means), 27 ... Upper cover (apparatus main body),
28, 29 ... Dust-proof cover (apparatus main body), 32 ... Drive gear (rotational force transmission means), 38, 40 ... Timing gear (rotational force transmission means), 50, 52 ... Link, 60 ... Piping, 7
0 ... Holding mechanism, 80, 82 ... Guide member, 100 ... Dust suction device

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tsuneyoshi Hirano             1-14-1 Uchikanda, Chiyoda-ku, Tokyo             Stand Plant Construction Co., Ltd. (72) Inventor Kazuhito Nakamitsu             1-14-1 Uchikanda, Chiyoda-ku, Tokyo             Stand Plant Construction Co., Ltd. F term (reference) 3C047 FF09 HH12                 3C049 AA03 AA11 AA14 AA16 AA18                       CB03 CB06                 3C058 AA03 AA11 AA14 AA16 AA18                       CB03 CB06

Claims (3)

[Claims] 1. A device main body capable of enclosing an outer circumference of a pipe, and at least two or more polishing members rotatably provided on the device main body and pressed against an outer peripheral portion of the pipe when the device main body surrounds the pipe. A wheel, a rotary drive source provided in the apparatus main body, a rotational force from the rotary drive source is transmitted to the two or more polishing wheels, and rotation directions of these polishing wheels are opposite to each other. And a rotational force transmitting means for transmitting the rotational force. 2. The pipe polishing device according to claim 1, wherein a dust cover is provided near the polishing wheel of the pipe polishing device, and a dust suction device is connected to the dust cover. . 3. The pipe polishing device is provided with a guide member for guiding the device main body to rotate around the axis of the pipe, according to claim 1 or 2. Pipe polishing device.