JPH08357B2 - Inner surface polishing equipment - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe inner surface polishing device such as a welded portion in a pipeline such as a gas pipe or a water pipe, even if the pipeline has a curved pipe portion. The present invention relates to a pipe inner surface polishing device having a function of freely traveling inside and polishing a pipe inner surface at a predetermined position by a revolving orbiting wire brush and observing the polished state on a television image.

2. Description of the Related Art As a method of polishing the inner surface of a pipe such as a welded part, a traveling carriage equipped with a traveling mechanism using a motor as a drive source and a fixing mechanism at a predetermined position in the pipe is provided with one or more motor-driven rotating brushes. Provide, stop the traveling carriage at a predetermined position in the pipe,
A method in which a rotating brush is brought into contact with the inner surface of the tube and polishing is common.

However, since the conventional polishing trolley can travel only the straight pipe line structurally and cannot pass through the curved pipe part, the polishing of the inner surface of the pipe is limited to the straight pipe part only. There is a drawback that it cannot be used for polishing a welded part.

In addition, the conventional polishing trolley does not have a mechanism for expanding the diameter of the wire brush to the inner surface of the pipe or a function to observe the polishing state of the inner surface of the pipe, so the wire brush comes into contact with the inner wall of the pipe and hinders running inside the pipe. May cause abrasion, insufficient polishing, or excessive polishing.

The conventional polishing method is generally a method in which a wire brush is attached to a rotary shaft connected to a motor drive shaft, and the brush is rotated by circumferentially rotating along the inner surface of the pipe for polishing, but the wire brush is simply revolved. Since the polishing effect is small only by itself, a method of revolving the wire brush itself while revolving is proposed (see Japanese Utility Model Laid-Open No. 62-106676).
This revolving orbiting wire brush has the advantage that a greater polishing effect can be obtained than a wire brush that only revolves. However, a polishing device with this revolving orbiting wire brush also has a curved pipe passage mechanism and a polishing device. Since it does not have a part observation function, the applicable pipeline was limited to the straight pipe part, and the degree of polishing could not be confirmed.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In view of the above-mentioned circumstances, the present invention has a problem of impossibility of passing through a curved pipe portion in a device for running inside a pipe and polishing a pipe inner surface by a revolving orbiting wire brush. It is an object of the present invention to propose a pipe inner surface polishing device having a function of eliminating defects such as undetectability, freely traveling and polishing in a pipe having a curved pipe portion, and having a function of accurately detecting a polishing degree.

Means for Solving the Problems The present invention provides a device body composed of a tubular casing having a structure capable of freely and stably running even in a curved pipe portion, a rotation-revolution type cup wire brush, and a diameter expansion of the wire brush. A mechanism and a television camera for observing the polishing portion are provided so that the welded portion of the pipe having the curved pipe portion can be completely polished.

That is, the present invention provides two tubular casings each having a guide roller on the outer periphery of the tubular casing so as to be movable in the pipe and having a guide roller with a diameter-expanding mechanism for fixing the pipe at a predetermined position in the pipe. A plurality of radially arranged rotary cylinders mounted on the connecting shaft of the apparatus body so as to rotate integrally with the connecting shaft of the apparatus body, the rotating cylinder body being connected to the connecting shaft at predetermined intervals. A cup wire brush inserted into and retractable from the tubular body so as to rotate integrally with the tubular body, a mechanism for rotating the brush itself in the rotary tubular body, and a diameter expanding mechanism for the guide roller with the diameter expanding mechanism. The gist of the present invention is a pipe inner surface polishing device equipped with an interlocking cup wire brush diameter-expanding mechanism and a television camera for displaying an image of the polishing portion.

Action The guide rollers of the pair of two cylindrical casings are composed of two types, fixed type and movable type. The fixed type is a multi-row guide roller fixed on the outer periphery to allow smooth passage even in a curved pipe. The movable type is constituted by a guide roller having a diameter expanding mechanism which operates via a link mechanism or the like by the power of a motor or the like in order to have a function of fixing the entire device in the tube in correspondence with the tube diameter.

The apparatus main body is formed by connecting a pair of two casings with a connecting shaft arranged at the center of the casings with a predetermined space therebetween, and integrating them, and the rotating shaft revolving mechanism and the diameter expanding mechanism of the cup wire brush are mounted on the connecting shaft. .

The rotation and revolution mechanism of the cup wire brush is such that the legs of the cup wire brush are rotatably mounted on a plurality of radially arranged rotating cylinders that are rotatably (revolved) externally fitted to the connecting shaft of the main body of the device. The gear is fixed to a support shaft which is inserted and is integrally connected to the wire brush leg via a spring, and the bevel gear fixed to the connecting shaft and the gear fixed to the support shaft are meshed with each other to rotate. At the same time as the cylinder revolves, the cup wire brush is a mechanism that rotates in the rotating cylinder.

It should be noted that a plurality of rotary cylinders arranged radially are used as a mechanism that is rotationally driven via a gear by a polishing motor built in one casing.

The diameter expansion mechanism of the cup wire brush is provided in order to reduce the diameter of the wire brush so that the wire brush does not come into contact with the inner wall of the pipe when passing through the curved pipe so as not to hinder the passage, and the inner surface of the pipe is fixed with a predetermined contact pressure during polishing. This is so that they can be brought into contact with each other for polishing.

This wire brush diameter-expanding mechanism connects a movable body slidably fitted to a connecting shaft of the apparatus main body and a wire brush via a link, and moves the movable body back and forth via a screw rod by a motor drive. The wire brush expands and contracts.

In a television camera for imaging the in-pipe polishing portion, the main body is mounted in one casing, and the lens portion is provided so as to project to the outer surface of the casing so as to be located below the inner contact line of the guide roller inner surface.

The diameter of the cup wire brush is reduced during traveling in the pipe, and at a predetermined position in the pipe, the entire device is fixed at the center of the pipe by a guide roller with a diameter expansion mechanism, and the cup wire brush is expanded by the wire brush diameter expansion mechanism. The diameter of the pipe is brought into contact with the inner surface of the pipe, and then the polishing motor is driven to polish the inner surface of the pipe.

When polishing of the inner surface of the pipe is completed, press the cup wire brush against the inner wall of the pipe to fix the device, reduce the diameter of the guide roller for fixing the casing on which the TV camera is attached, and drive the polishing motor to install the TV camera. By rotating the casing, the polishing state can be observed over the entire circumference.

When the polishing at that position is completed, the guide roller and the cup wire brush are reduced in diameter by the respective diameter expansion mechanisms and run. Thereafter, the same operation as described above is repeated to perform polishing at each position.

Embodiment FIG. 1 is a vertical sectional side view showing an apparatus according to an embodiment of the present invention,
FIG. 2 is a vertical sectional front view taken along the line II-II in FIG.

In FIG. 1, (1) is a conical casing (1).
-1) A device body formed by connecting (1-2) with a connecting shaft (1-3), (2) a fixed guide roller provided at equal intervals on the outer circumference of the casing, and (3) also on the outer circumference of the casing. For example, three sets of guide rollers with a diameter-expanding mechanism provided at 120 degree intervals, (4) a wire brush rotating cylinder, (5) a cup wire brush, (6) a television camera, (M ₁ ) a polishing motor, (M ₂ ) is the motor for expanding the guide roller, (M ₃ )
Is a wire brush diameter expanding motor.

The fixed guide roller (2) comprises a plurality of rollers (2-2) rotatably mounted between a pair of parallel side plates (2-1). ) Is attached to the casing.

The guide roller (3) with a diameter-expanding mechanism is provided, for example, on a slide rod (3-2) provided on the front walls (1-4) of the facing surfaces of both casings so as to be slidable in the radial direction. )
Install the partition wall (1-5) and front wall (1-
4) The slide rod (3-2) is attached via a link (3-6) to a disc (3-5) screwed to a screw rod (3-4) provided between the two so as to be movable in the pipe axis direction. Pivot and disc (3-
The slide rod (3-2) is operated in the pipe radial direction by the forward and backward movement of 5), and the screw rod (3-4) is for expanding the diameter of the guide roller installed in the partition wall (1-5) in the same casing. The mechanism is driven by a motor (M ₂ ) via a gear (not shown).

The disc (3-5) is slidably supported on the connecting shaft (1-3) for stabilizing the operation and preventing backlash.

The rotation mechanism of the wire brush revolves around the connecting shaft (1-
A polishing drive motor (M ₁ ) in which three sets of rotating cylinders (4), which are rotatably fitted to the outer ring 3) via bearings (8), are provided at intervals of 120 degrees, for example, are installed in the partition wall (1-5). By means of the transmission shaft (7) and the gears (G ₁ ) (G ₂ ), and the leg portion (5-1) of the cup wire brush (5) is rotated by the rotating cylinder body (4). A bevel gear (11) slidably fitted and attached to an end of the central axis (10) of the brush leg (5-1), and a bevel gear (12) integrally provided with the connecting shaft (1-3). Mesh with the rotary cylinder (4)
Bevel gear (11) and bevel gear (1)
2) through the central axis (10) and the wire brush leg (5-
1) is a mechanism that rotates (rotates) integrally.

Further, the diameter-expanding mechanism of the cup wire brush (5) has a groove (5-) formed on the outer periphery of the leg portion (5-1) of the brush.
2) The long hole (5-3) provided on the side wall of the rotary cylinder (4).
The other end of the bifurcated link (14) having a bush (13) penetrating therethrough and loosely fitted is pivotally attached to a movable body (15) slidably fitted on the connecting shaft (1-3), Wall (1-4)
And a screw rod (16) installed horizontally through the partition (1-5)
One end of the screw rod (1) is connected to the movable body (15), and a nut (17) screwed to the other end is rotated by a wire brush diameter expanding motor (M ₃ ) via a gear (not shown). 16) moves back and forth, and the leg portion (5-1) of the cup wire brush (5) passes through the movable body (15) integrated with the screw rod, the link (14) and the bush (13), and the rotary cylinder body (4). ), And the cup wire brush (5) is pressed against the pipe wall via the spring (5-4) fitted inside the leg (5-1).

The television camera (6) is attached to the rear part of the one casing (1-1) by an appropriate means, and a lens barrel (6-
1) is protruding.

In the above-mentioned device, the guide roller (3) with a diameter-expanding mechanism is reduced in diameter during traveling in the pipe, and when it is located at the polishing location, the guide roller is expanded to fix the entire device at the center of the pipe.

Then, the wire brush diameter expanding motor (M ₃ ) is driven to bring the cup wire brush (5) into contact with the inner wall of the tube, and then the polishing motor (M ₁ ) is driven to rotate the rotary cylinder (4). Rotate for polishing.

When polishing is completed, the cup wire brush (5) is pressed against the inner wall of the tube to fix the device, and the fixing guide roller (3-3) of the casing (1-1) on which the TV camera (6) is attached is contracted. By driving the polishing motor (M ₁ ) in a diameter-wise state and rotating the casing (1-1), the polishing state can be observed over the entire circumference.

EFFECTS OF THE INVENTION Since the present invention is configured as described above, it has the following effects.

The main body of the device is designed so that it can travel smoothly even in a curved pipe section, so it can be freely traveled in the piping regardless of whether the tow system or the drive cart system is used, and it is easy to reach the polishing area. Can be positioned quickly.

By the action of the guide roller with the diameter-expanding mechanism, the main body of the apparatus can be located at the center of the tube axis for polishing.

Since the cup wire brush has not only the rotation and revolution mechanism but also the diameter expansion mechanism, the cup wire brush can be run away from the inner surface of the pipe while running inside the pipe, and it can smoothly pass through the curved pipe part as well. .

Since the cup wire brush has a function of being pressed against the inner wall of the tube by a spring, it can follow and polish even if there is some eccentricity.

Since the television camera for photographing the polishing portion is provided, it is easy to observe the polishing state and confirm the polishing position, and the polishing can be performed accurately.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an apparatus according to an embodiment of the present invention, and FIG. 2 is a vertical sectional view taken along the line II-II in FIG. 1 ...... Device main body 2 ...... Fixed guide roller 3 ...... Guide roller with diameter expansion mechanism 4 ...... Wire brush rotating cylinder 5 ...... Cup wire brush 6 ...... TV camera M ₁ ...... Abrasive motor M ₂ ... … Motor for expanding guide roller diameter M ₃ …… Motor for expanding wire brush diameter

Front page continuation (72) Inventor Yasuji Hosohara 1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas Co., Ltd. (72) Inventor Michio Ozawa 4-1-2 Hiranocho, Chuo-ku, Osaka-shi, Osaka Osaka-gas Incorporated (72) Inventor Yu Yamada 19-18 Sakurada-cho, Atsuta-ku, Nagoya, Aichi Toho Gas Co., Ltd. (72) Inventor Kimio Nakajima 4-53, Kitahama, Chuo-ku, Osaka-shi, Osaka Sumitomo Metals Industrial Co., Ltd. (72) Inventor Takahide Sakamoto 4-53-3 Kitahama, Chuo-ku, Osaka City, Osaka Prefecture Sumitomo Metal Industries Co., Ltd. (56) Reference JP 62-283056 (JP, A) Actual development Sho 55 -115743 (JP, U) Actual development Sho 53-132765 (JP, U)

Claims (1)

[Claims] 1. Two cylindrical casings, which are provided with guide rollers on their outer circumferences so as to be movable in a pipe and have guide rollers with a diameter-expanding mechanism for fixing them at predetermined positions in the pipe, at predetermined intervals. A plurality of rotary cylinders arranged radially on the connection shaft of the apparatus body so as to rotate integrally with the connection shaft of the apparatus body, and integrally formed with the rotary cylinder. Cup wire brush that is inserted into and retracted from the same cylindrical body so as to rotate, and a mechanism that rotates the brush itself in the rotating cylindrical body, and a cup wire that interlocks with the diameter expansion mechanism of the guide roller with the diameter expansion mechanism. A pipe inner surface polishing device comprising a brush diameter expanding mechanism and a television camera for displaying an image of the polishing portion.