JP2603705Y2 - Large diameter pipe cutting equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large-diameter pipe cutting apparatus, particularly a large-diameter pipe cutting apparatus having a diameter of about 2000 mm or more, such as a fume pipe for water supply and sewerage.

[0002]

2. Description of the Related Art Conventionally, for cutting a large-diameter steel pipe or the like, an automatic gas cutting apparatus in which a fusing nozzle runs along the circumference of the pipe is known. However, in the case of a large-diameter fume tube, the operator holds the high-pressure water nozzle or the high-pressure water nozzle mixed with sand blast in his hand and cuts it while moving it along the cut line of the drawn fume tube. I have. Example proposed as cutter also, for example, found in the real-Open No. 1-132400, a high pressure
Water nozzle and its drive motor are integrated along the guide rail
Moving, so the space between the object to be cut and other structures is narrow
Cannot be used in some cases or the object to be cut is underwater
And large diameter tanks such as heavy oil tanks.
Is not applicable and the working range that can be used is limited. Apparatuses for cutting from the inner surface of a pipe are disclosed in, for example, JP-A-61-87020 and JP-A-3-154707.
These can be used when a cutting device can be inserted like a steel pipe sheet pile.

[0003]

[Problem to be Solved by the Invention] In the existing water and sewage fume pipe cutting work, stopping the water impairs urban life and is impossible. Therefore, the work was a cutting work by a diver, and there was a problem in the skills and cutting accuracy of the worker, and the working environment was poor, so that the working efficiency was extremely poor.

[0004] Even in the newly constructed water and sewage works, it is extremely difficult to hold the high-pressure nozzle by hand for a long time, even though it is on the ground. The present invention has studied the structure of cutting a large-diameter pipe by automatically running a high-pressure water nozzle on the outer circumference of the pipe in the same manner as an automatic gas cutting machine for steel pipes, and solved the above-mentioned problems. Things.

[0005]

That is, a guide rail is provided on the outer periphery of a large-diameter pipe, and a roller chain is caused to run in the circumferential direction so that only the nozzle orbits along the outer circumference of the pipe. .

More specifically, a roller chain 3 with a plurality of divided arc rails 1 fastened to the outer periphery of a large-diameter pipe, for example, a large-diameter fume pipe, and a high-pressure water nozzle mounting base 2 supported by the arc rail and circling. And a motor 4 integral with the arc-shaped rail 1 for running the roller chain.
If, Ri Do from the operation panel 5 of the motor, the circle a large diameter tube outer periphery
Row rotated by motor 4 fixed with arc rail
Only the high-pressure water nozzle moves around the outer circumference of the large-diameter pipe in LaChain3
This is a large-diameter pipe cutting device characterized in that the cutting is performed. The motor 4 is preferably controlled by inverter control because the cutting speed can be varied.

[0007]

The large-diameter pipe cutting device according to the present invention installs a plurality of divided arc rails 1 on the outer periphery of the large-diameter pipe and controls the motor to a high pressure.
Separated from the water nozzle and along the arc rail on the outer circumference of the large diameter pipe
By fixing, the outer circumference of the large-diameter pipe is only high-pressure water nozzle
There may be orbiting while cutting. Non-contact cutting is possible without manual operation of the nozzle. High speed of 3600mm / H is possible when cutting 150mm thick fume tube.

[0008]

FIG. 1 is a front view showing a state in which a large-diameter pipe cutting device of the present invention is mounted on a fume tube 11, and FIG. 2 is a side view thereof. As shown in these figures, in the large diameter pipe cutting device of the present invention, the arc rail 1 divided into a plurality of parts around the large diameter fume pipe is fastened and fixed by the turnbuckle 6. In this example, the entire circumference of the arc rail 1 is divided into three parts, so that attachment and detachment are easy. Further, there is a concave portion 1a at the center. A roller chain 3 is fitted in the concave portion 1a. The roller chain 3 goes around the entire circumference, and is stretched along with the arc rail 1 on a sprocket 4a of a motor 4 mounted on a fume tube. It has a mounting base 2. The motor 4 is freely rotated and stopped by the operation panel 5.

Details of the high pressure water nozzle mounting base 2 are shown in FIGS.
It was shown to. FIG. 3 is an enlarged front view of the nozzle mounting base, and FIG. 4 is an enlarged view of the nozzle mounting base taken along line AA in FIG. The nozzle mounting base 2 has a fixing seat 2a to the roller chain 3 on the back surface, and guide rollers 2b, 2b are provided inward from both sides of the back surface. At the upper part of the gantry 2, a nozzle fixing column 2c is in an upright state, and there is a nozzle mounting port 2d in the horizontal direction. The nozzle mounting port 2d is a horizontal hole, and after the nozzle is inserted, it is tightened and fixed from above by screws 2e.

The operation procedure of the large diameter pipe cutting device according to the present invention will be described below. Along the circumference of the large-diameter fume pipe,
The traveling arc rail 1 divided into three parts is connected by bolts, and the tightening force is adjusted by the turnbuckle 6. The roller chain 3 is extended along the inside of the circular arc rail, is mounted on the sprocket 4a of the motor 4, and the nozzle mounting base 2 is mounted on the roller chain 3 to adjust the chain tension with the turnbuckle 7. The base of the motor 4 is integrated with the arc rail. Attach the high-pressure water nozzle header to the nozzle mounting port 2d of the nozzle mounting base 2. The motor 4 and the operation panel 5 are connected. The speed adjustment and the cutting start point are determined, and the mounting of the cutting jig is completed.

[0011]

[Effect of the Invention] Since the large diameter pipe cutting device of the present invention is configured as described above, the cutting precision can be cut according to the dimension rather than being cut by a person. Cutting can be performed by moving only the nozzle, and cutting can be performed regardless of whether it is in the water or in the air, and there is no need to cut off with water or a diver. In addition, since the force applied to the cut surface is very small due to non-contact cutting, there is no distortion of the cut surface, and continuous operation can be performed only by assembling the equipment, dismantling work, inspection adjustment work, so during conventional cutting work What was done by one operator and two nozzlemen at full length, using the large-diameter pipe cutting device of the present invention, two installation adjusters work at the beginning of the work, and one operator is good during the cutting work. In addition, work can be performed in about one-third of the steps.

Regardless of the pipe diameter, cutting can be performed by increasing or decreasing the number of arc rails and roller chains, and the cutting speed, forward movement, and backward movement can be freely changed at hand. Further, since the device can be disassembled and moved, it can be used even in a place where the work place is narrow.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which a large-diameter pipe cutting device of the present invention is equipped on a fume pipe.

FIG. 2 is a side view showing a state in which the fume pipe is equipped with the large-diameter pipe cutting device of the present invention.

FIG. 3 is an enlarged front view of a nozzle mounting base.

FIG. 4 is an enlarged view of the nozzle mounting base taken along the line AA in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Arc rail 2 High pressure water nozzle mounting base 3 Roller chain 4 Motor 5 Operation panel 6 Turnbuckle 7 Turnbuckle 11 Hume tube

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B26F 3/00

Claims (1)

(57) [Scope of request for utility model registration] 1. A circular arc rail 1 that the plurality of divided to clamping the large diameter tube outer periphery, a high pressure water nozzle mounting frame 2 with the roller chain 3 circulates is supported by the arcuate rail,
And an arc rail 1 for running the roller chain
And the motor 4, Ri Do from the operation panel 5 of the motor, large diameter
Rotated by a motor 4 fixed with an arc rail around the pipe
High pressure water nozzle on the outer circumference of large diameter pipe with rotating roller chain 3
A large-diameter pipe cutting device characterized in that only one moves and cuts.