JP2655375B2 - In-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 an in-pipe cutting device for cutting a fitting port of a lining material inside a sewer main pipe or the like.

[0002]

2. Description of the Related Art FIG. 9 shows a known in-pipe cutting apparatus.

In this in-pipe cutting device A, a tip cutting portion D is attached to a piston rod C of a double rod type front-back driving cylinder B, and a rotary driving mechanism G including a rotary driving cylinder E and a gear mechanism F is used. The tip cutting portion D is rotated via a piston rod C, and a cutting member (not shown) provided in the tip cutting portion D is used by using a front-rear drive cylinder B and a rotary drive cylinder E together. Operate in a circular motion to cut the installation mouth of the lining material. In addition, a device that operates the cutting member in a stepwise manner along the mounting port or a device that operates the cutting member in a spiral shape is employed.

[0004]

By the way, the cutting environment in the pipe becomes considerably severe due to the generation of cutting chips and the like. Therefore, when the transmitting portion of the rotary drive mechanism G is exposed as in the in-pipe cutting device A, the transmitting portion is affected by cutting chips and the like, and the cutting member performs an unexpected operation and damages the mounting pipe. It is also expected that the situation will go wrong.

In order to prevent such a situation from occurring, it is conceivable to seal the entire rotary drive mechanism G with a cover. In this case, however, it is necessary to use a considerably small cylinder in order to avoid an increase in size of the apparatus. Must be used, resulting in reduced work efficiency.

Therefore, an object of the present invention is to provide an in-pipe cutting device having an accurate and sufficient working ability.

[0007]

In order to achieve this object, the present invention provides a front-rear drive cylinder, a tip cutting portion having a cutting member attached to a piston rod of the front-rear drive cylinder, and the piston A rotary drive mechanism for rotating the tip cutting section via a rod, and an in-pipe cutting device, the rotary drive mechanism comprising: a cylindrical rotary drive piston disposed coaxially with the piston rod;
A means is used in which the piston rod is moved in the front-rear drive cylinder in the front-rear direction and rotated through a helical spline structure.

The cutting member comprises a cylindrical portion having a grindstone portion on the peripheral surface, and a tapered portion having a diameter reduced toward the tip and having a grindstone portion on an inclined surface, and is also horizontally and vertically. It is preferable that the device can be attached to a vehicle.

[0009]

The tip cutting portion is rotated by moving the rotary drive piston in the front-rear drive cylinder in the front-rear direction, so that the rotation transmitting portion is not affected by cutting chips or the like. In addition, a sufficient pressure receiving area can be given to the rotary drive piston while keeping the size of the device within an allowable range.

A hole is made in the lining material with a tape-like portion of the cutting member, and a mounting opening of the lining material is cut with a cylindrical portion. Further, the protruding portion of the mounting pipe is cut using a tape-like portion, and a cutting member is mounted horizontally to finish-cut using a cylindrical portion.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a perspective view of an in-pipe cutting device according to the present invention.

A front receiving member 3, an intermediate receiving member 5, and a rear receiving member 7 are fixed between the supporting plates 1, 1.
A hydraulic front-rear drive cylinder 11 is mounted on these receiving members 3, 5 and 7. A guide plate 15, which is a component of a tip cutting portion 14, is fixed to a piston rod 13 (see FIG. 2) of the front-rear drive cylinder 11. Hydraulic up and down drives are provided on both left and right sides of the guide plate 15, respectively. Cylinders 17, 17 are fixed.
A vertically moving plate 19 is attached to a piston rod (not shown) of the vertically driving cylinders 17, 17, and the vertically moving plate 19 is a guide portion 1 of the guide plate 15.
Vertical movement is performed along 5a. Support members 21 and 21 are fixed to the front surface of the up and down moving plate 19.
Mounting plate 23 mounted on the upper side of 1, 21
Further, a diamond wheel 25 as a cutting member and a hydraulic motor 27 for rotating the diamond wheel 25 are supported.

The diamond wheel 25 has a cylindrical shape 2
5a, and a tapered portion 25b whose diameter is reduced toward the tip. The peripheral surface of the columnar portion 25a and the upper surface and the inclined surface of the tapered portion 25b have a diamond blade member. 25c (grinding stone portion) is fixed.

The diamond wheel 25 can be mounted horizontally (see FIG. 5).

The lower side of the vertical drive cylinders 17, 17 has a common inlet / outlet member 29 connected to one oil hose.
Are linked by

The piston rod 13 of the front-rear drive cylinder 11 moves in the front-rear direction by the hydraulic pressure from the inlet / outlet ports 31 and 33, but rotates spirally by the hydraulic pressure from the rotary ports 35 and 37. Rotational force is transmitted from the driving piston 39 (see FIG. 3) to perform a rotational motion.

A clamp device 43 for fixing the apparatus to the sewer main pipe 41 (see FIG. 2) is provided on the support plates 1 and 1.
Are mounted, and running wheels 45 are provided (see FIG. 2).

In the drawing, 47 is a handle, 49 is a wire connection, 51 is a chain connection, and 53 is a U-bolt fixing the rear part of the front-rear drive cylinder 11.

FIG. 2 is a view showing a case where the in-pipe cutting device is disposed in the sewer main pipe 41.

An attachment pipe 55 is connected to the sewer main pipe 41, and a lining material 57 is lined. The in-pipe cutting device is pulled by the wire 59 connected to the wire connection part 49 until the diamond wheel 25 is located at the mounting mouth portion 57a of the lining material 57. When the in-pipe cutting device is positioned, the clamping cylinder 43a of the clamp device 43 operates and contracts, and rises until the clamp member 43b presses the lining material 57 (see the phantom line). When the in-pipe cutting device is fixed in the sewer main pipe 41, the hydraulic motor
The wheel 27 operates to rotate the diamond wheel 25. Then, the vertical drive cylinder 17 is actuated to raise the diamond wheel 25, and the tapered portion 25b makes a wheel hole in the mounting opening 57a of the lining material 57 (see the phantom line). After that, the diamond wheel 25
The piston rod 13 of the front / rear drive cylinder 11 is moved back and forth and rotated so that the piston rod 13 moves in a circle while keeping a certain distance from the inside of the mounting pipe 55. Therefore, a cutting hole having a diameter substantially equal to the inner diameter of the mounting pipe 55 is formed in the mounting pipe opening portion 57a of the lining material 57 by the columnar portion 25a of the diamond wheel 25.

Running wheels 45 are provided below the support plates 1 and 1 so as to protrude slightly from the lower ends of the support plates 1 and 1. A ski member may be attached to the lower outer surface of the plates 1 and 1.

In the figure, reference numeral 60 denotes a front-rear driving cylinder 11.
Is fixed to the front receiving member 3 (see FIG. 1), 61 is a chain connected to a control unit (not shown), 63 is a piston rod of the vertical driving cylinder 17 It is a stroke restricting ring fitted to the.

FIG. 3 is a schematic upper sectional view of the front-rear driving cylinder 11.

A front-rear drive piston 65 is attached to the rear end of the piston rod 13 of the front-rear drive cylinder 11.
The front-rear drive piston 65 receives the oil pressure from the inlet / outlet ports 31 and 33 provided on the cylinder tube 67 and moves the piston rod 13 in the front-rear direction. On the outside of the front part of the piston rod 13, a cylindrical rotary drive piston 3 is provided.
9 are coaxially arranged, and a helical spline 71 is formed on the outer periphery of the rotation driving piston 39. The inside of the boss member 73 attached to the cylinder tube 67 is fitted into the helical spline 71. When the rotational drive piston 39 is to be moved in the front-rear direction, the rotational drive piston 39 rotates. It moves spirally with it. A helical spline 77 is also formed on the outer periphery of the enlarged rotary cylinder 75 disposed inside the rotary drive piston 39, and the inside of the rotary drive piston 39 is fitted into the helical spline 77, and the enlarged rotary cylinder 7
5 rotates largely by the helical motion of the rotational drive piston 39. A spline 7 is provided at the front of the piston rod 13.
9 are formed, and the spline 79 has an enlarged rotary cylinder 75.
Is fitted inside. Therefore, when the rotation driving piston 39 receives the oil pressure from the rotation ports 35 and 37 and moves in the front-rear direction, the piston rod 13 rotates without hindering the movement in the front-rear direction.

FIGS. 4 and 5 are views showing a case where the protruding portion of the mounting pipe 55 is cut by the in-pipe cutting device.

A mounting pipe 55 projecting into the sewer main pipe 41
Must be cut before lining the lining. For this reason, the diamond wheel 25 is operated so as to draw a circle, and the projecting portion 55a of the mounting pipe 55 is cut by the tapered portion 25b (FIG. 4). Thereafter, the mounting plate 23 is replaced at the front end of the support member 21, that is, the diamond wheel 25 is mounted horizontally, and the projection 55a is almost completely cut off by the columnar portion 25a of the diamond wheel 25 to finish. (FIG. 5).

FIG. 6 is a diagram showing a cutting method when the protruding portion 55a of the mounting pipe 55 is long.

An attachment plate 23 is attached to the front end of the support member 21.
And a hydraulic motor 27 for rotating the hole saw-81. Then, the hole saw 81 rises to near the upper surface of the sewer main pipe 41 by the operation of the vertical drive cylinder 17 (see the phantom line), and rotates by the operation of the hydraulic motor 27. Then, the front-rear drive cylinder 11
Is moved forward to roughly cut the protruding portion 55a of the mounting pipe 55. Then, Holso-81
Instead, the diamond wheel 25 is attached, and the protruding portion 55a is almost completely cut and finished.

FIG. 7 is a plan view of the diamond wheel 25.

Columnar portion 25 of diamond wheel 25
A mounting groove 25d is formed on each of the peripheral surface a and the upper surface and the inclined surface of the tape-like portion 25b.
Is a sectional view of the diamond wheel 25), and a diamond blade member 25c is brazed to the mounting groove 25d.

In FIG. 8, reference numeral 25e denotes a mounting hole for the output shaft of the hydraulic motor 27.

Further, in this in-pipe cutting device, since hydraulic devices are employed for all the working devices, pulsation is reduced and extremely accurate cutting work can be performed. In addition, a television camera can be attached to the in-pipe cutting device, and the operation can be performed while checking the cut portion with an external monitor.

[0034]

As described above, according to the present invention, it is possible to provide an in-pipe cutting apparatus which operates accurately even in a severe cutting environment, has a large output, and has a sufficient cutting ability.

The cutting member is composed of a cylindrical portion having a grindstone portion on the peripheral surface and a tapered portion having a diameter reduced toward the tip and having a grindstone portion on an inclined surface. If it is possible to mount the mounting pipe, the protrusion of the mounting pipe can also be efficiently and completely cut.

[Brief description of the drawings]

FIG. 1 is a perspective view of an in-pipe cutting device according to the present invention.

FIG. 2 is a view showing a case where an in-pipe cutting device is arranged in a sewer main pipe.

FIG. 3 is a schematic upper sectional view of a front-rear drive cylinder.

FIG. 4 is a view showing a case where a protruding portion of a mounting pipe is cut by an in-pipe cutting device.

FIG. 5 is a diagram showing a case where a protruding portion of a mounting pipe is cut by an in-pipe cutting device.

FIG. 6 is a view showing a cutting method when the mounting tube has a long protrusion.

FIG. 7 is a plan view of a diamond wheel.

FIG. 8 is a cross-sectional view of a diamond wheel.

FIG. 9 is a perspective view of a conventional in-pipe cutting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Front-back driving cylinder 13 Piston rod 14 Tip cutting part 25 Diamond wheel (cutting member) 25a Columnar part 25b Tapered part 25c Diamond blade member (grinding stone part) 39 Piston for rotation drive 71, 77 Helical spline

Claims (2)

(57) [Claims] 1. A front-rear driving cylinder, a tip cutting portion having a cutting member attached to a piston rod of the front-rear driving cylinder, and a rotation drive mechanism for rotating the tip cutting portion via the piston rod. In the in-pipe cutting device, the rotary drive mechanism moves a cylindrical rotary drive piston disposed coaxially with the piston rod in the front-rear drive cylinder in the front-rear direction, thereby forming a helical spline structure. An in-pipe cutting device for rotating the piston rod through the pipe. 2. The cutting member comprises a cylindrical portion having a grindstone portion on a peripheral surface, and a tapered portion having a diameter reduced toward a tip end and having a grindstone portion on an inclined surface, and furthermore, horizontally. 2. The device according to claim 1, wherein the device can be mounted vertically.
The in-pipe cutting device as described in the above.