JPH02120170A - Pipe working carriage - Google Patents

Abstract

PURPOSE:To aim at smooth passage to a bent pipe part and stable work by installing an arm, free of movements in both pipe-axial and radial directions, in a rotary frame installed in the intermediate part of a body provided with wheels, and also installing a retractable working device in this arm. CONSTITUTION:A rotary frame 61 is installed in the intermediate part of a body, while a frame 52 is radially installed in each of front and rear parts as well. At this time, a par of wheels 56 are installed in this frame 52 so as to be moved by a motor 54 as guided by a guide 53. In addition, each cylinder as a locking device is installed in front and in the rear of the body 51 as being opposed to each other. On the other hand, a slider 64 is installed on a bracket 63 installed in the rotary frame 61 so as to be driven by a motor 65 and to be moved in the pipe-axial direction. Then, another slider 67 is installed on a bracket 66 installed in the slider 64 so as to be moved in the vertical direction by driving it by another motor 69. In addition, a working device 70 is attached to this slider 67 via an arm 68.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a work cart for repairing the inside of gas pipes, oil pipes, water and sewage pipes, etc.

[Prior Art] Conventionally, work such as the above-mentioned work cart has been towed by a towing cart or the like to a predetermined location within a pipe to carry out work such as welding repair.

[Problem to be solved] However, with conventional work carts, no special consideration was given to the case where the vehicle passes through a curved pipe section, so when passing through a curved pipe section, working tools, etc. could be damaged by contact with.

An object of the present invention is to provide an in-pipe working trolley that can solve the above-mentioned problems.

[Means for Solving the Problems] The in-pipe working trolley of the present invention includes wheels and a fixing device provided so as to be driven forward and backward in a radial direction in front and behind the main body, and a fixing device provided in an intermediate portion of the main body so as to be driven rotationally. A rotating mount is installed on the mount, and a work tool mount is installed on the mount so that it can be moved in the axial and radial directions of the pipe. It consists of a work tool installed so that it can be moved toward the wall.

[Operation] The trolley is pulled to a predetermined position inside the pipe by wheels provided at the front and rear of the main body, and is fixed at that position by a fixing device. While traveling, the arm to which the work implement is attached can be retracted radially to a position close to the center, and the work implement itself can be retreated close to the center, thereby preventing damage when passing through the bent pipe section.

When working, first move the tip of the tool close to the pipe wall,
Next, to attach the work tool, move the arm in the tube axis direction to position the work tool. Then, the working tool is brought into contact with the pipe wall, the working tool is operated, and the rotary frame to which the working tool is attached is rotated to perform work along the circumference of the pipe.

[Embodiment] An embodiment of the present invention will be described with reference to FIGS. 1 to 4 in the case of a welding work trolley.

A vibrator-shaped rotary pedestal 61 is rotatably provided in the middle of the main frame 51 which is a tubular main frame. Four frames 52 are provided radially at the front and rear of the main body 51, respectively. A pair of wheels 56 are guided by guides 53 to each frame 52, and motors 54
It is provided to move forward and backward in the radial direction. In this case, four pairs of wheels arranged symmetrically with respect to the tube axis are controlled to advance and retreat in synchrony.

Furthermore, two cylinders serving as fixing devices 57 are provided at the front and rear of the main body 51, facing each other on a line passing through the center, and the cylinder head 58 is brought into contact with the inner wall of the pipe to fix the truck. . Then, the rotating pedestal 61
As shown in the figure, the mount is provided with a pinion 62 that meshes with a rack provided around the tubular main body 51, and by rotationally driving this pinion, the mount is rotationally driven around the main body. .

Connecting hardware 26 is provided at the front and rear of the main frame 51, and a tow truck (not shown) or the like is connected to the main frame 51 via a universal joint 27.

In addition, in order to avoid excessive bending at the universal joint part when passing through the bent pipe part and causing trouble in running, the conical part 28a is provided with a conical part 28a, which the outer circumferential part of the end of the connected truck, etc. comes into contact with. A shaped stopper disc 28 is provided.

A tube axis direction bracket 63 is provided on the pedestal 61, and a slider 64 is driven by a motor 65 to move on this bracket in the tube axis direction. A vertical bracket 66 is attached to this slider 64, and a slider 67 is moved vertically on this bracket by a motor 69. An arm 68 to which a working tool is attached is attached to the slider 67.

A welding torch 7 as a working tool is installed at the center of the upper end of the arm 68.
0 is attached, and a motor 71 causes it to lie down as shown in FIG. 3 while running, and to stand up as shown in FIG. 4 during work.

Further, on the lower end side of the arm 67, a lighting device 74 and a camera 73 are provided for illuminating the welding part.

When traveling, the motor 54 pulls back a pair of wheels 56 symmetrically provided with respect to the tube axis in the radial direction.

Further, as shown in FIG. 3, the arm 68 is connected to a motor 69 (
(Fig. 1) to move the torch 7 closer to the center.
0 by the motor 71, all the devices are placed within the circle indicated by the two-dot chain line. In this way, working tools and the like are prevented from coming into contact with the inside of the curved pipe and being damaged when passing through the curved pipe.

On the other hand, during work, the cart is moved to a predetermined position within the pipe by a towing cart or the like (not shown), and the wheels 56 are pushed out, and the head 58 is pushed out by the cylinder 57, which is a fixing device, to fix the cart at a predetermined position. Then, as shown in FIG. 4, the torch 70 is erected by the motor 71,
The arm 68 is moved so that the torch 70 approaches the pipe wall.

In this state, the motor 65 moves the slider 64 in the tube axis direction to align the torch 70 with the welding part, thereby positioning the torch 70. Once the torch 70 has been positioned in this manner, the torch is activated and the rotating pedestal 61 is rotated by the pinion 62 to perform welding work.

In this case, the welding start position is directly above, that is, at the 12 o'clock position, and the torch 70 is rotated half a circle clockwise to weld to the 6 o'clock position, and then from the 12 o'clock position, it is rotated half a circle counterclockwise. Weld to the 6 o'clock position and then weld the entire circumference.

Next, a polishing cart equipped with a grinder as a working tool will be explained with reference to FIG. 5.6.

This differs from the embodiment described above only in the attachment of the grinder 80 as a working tool to the arm 68. That is, the proximal end of the grinder 80 is rotatably pivoted to the arm 68, and the distal end is moved back by the cylinder 81 to the position shown by the solid line in FIG. It is designed to fit in, and be extended to the position shown by the dashed line during work.

In this case as well, traveling and polishing work can be performed in the same manner as in the above embodiment in which the work tool is a welding torch.

[Effects of the Invention] The in-pipe working trolley of the present invention as described above can pass through a bent pipe portion without causing any damage to the working equipment. In addition, after fixing the trolley at a predetermined position within the pipe,
Stable work can be performed by positioning the work tool in the direction of the tube axis.

[Brief explanation of the drawing]

FIGS. 1 and 2 are a side view and a front view showing one embodiment of the present invention, and FIGS. 3 and 4 are a front view and a front view showing the positional relationship of the main parts during traveling and work, respectively. Figures 5 and 6 are
FIG. 7 is a side view and a front view of main parts of another embodiment. 51...Main body, 56...Wheel, 57...Fixing device, 61...Rotating frame, 68...Arm, 70...
Torch, 80... Grinder applicant's representative Patent attorney Takehiko Suzue Diagram

Claims (1)

[Claims] Wheels and a fixing device are provided so as to be driven forward and backward in the radial direction of the main body, a rotating pedestal is provided in the middle part of the main body to be driven in rotation, and An in-pipe work trolley consisting of a work tool attachment arm provided so that it can be moved toward the pipe wall, and a work tool provided so that it can be moved toward the pipe wall during work while retreating close to the center while traveling on this mounting arm. .