JPH078085Y2 - Perforator for lined pipe branch - Google Patents

Description

[Detailed Description of the Invention] Industrial field of application The present invention is to line a pipeline, such as a gas pipeline, a water pipeline, or a sewer pipeline, mainly buried in the ground for the purpose of repair or reinforcement, and The present invention relates to a device for perforating a lining material of a branch part and allowing the branch pipe to pass through the main pipe.

In general, in a pipeline near the end of the pipeline as described above, a branch pipe often branches from the pipeline.
For example, a low-pressure pipe in a gas pipe is buried in a road in the city, and city gas is supplied from the low-pressure pipe to a nearby house through a branch pipe, and a large number of branch pipes branch at short intervals. . The situation is exactly the same for water pipes and sewer pipes.

Thus, when an inner lining material is applied to the inner surface of such a pipe lined, the inner lining material blocks the branch portion of the branch pipe, so that the lining material of the branch portion is used in a later step. It is necessary to perforate and bring the branch pipe into the main pipe.

As a device for piercing the lining material for this purpose, for example, JP-A-56-158588, JP-A-56-158590,
JP-A-56-158591, JP-A-57-48391, JP-A-57-46189, JP-A-58-22209, and JP-A-58-2
7009, JP 58-106198, JP 56-141491
Those described in Japanese Patent Laid-Open Publication No. Sho 61-179724 and the like are known.

In these devices, a punching device is inserted into a duct to reach a branch portion, and a lining material of the branching portion is punched from the inside by a punching tool provided in the punching device.

As a punching tool used in these devices, a punching tool for punching the lining material at the branching portion with a hammer-like hitting tool (Actual No. 56-158588, No. 56-158590, (No. 56-158591, No. 57-48391, etc.), those that burn and pierce the lining material at the branch with a thermal iron (Actual number 61)
-188091, etc.), those which are perforated by a rotary drill (Shokai 58-106198, JP 61-179724 etc.) and the like are known.

Problems to be Solved by the Invention However, these devices have their respective drawbacks, and it is extremely difficult to accurately form a through hole having the maximum diameter of the branch pipe at the position of the branch portion. That is, in the type of punching the lining material at the branch portion with a hammer, it is necessary that the lining material is sufficiently rigid and brittle, and when a tough lining material reinforced with woven cloth is used, It cannot be perforated by the method. In addition, the impact may damage the lining material in the vicinity of the pipe line and the branch portion.

Further, in the type in which the lining material is burned out and perforated with a heat iron, the molten lining material may drip and damage the lining material at the bottom of the device or the pipeline. Further, the lining material around the perforated holes is easily deteriorated by heat.

These problems do not occur in the type of drilling with a rotary drill, but in the case of using a conical drill as shown in Japanese Patent Laid-Open No. 61-179724, use the drill with the inner diameter of the branch pipe. It is difficult to make a large-diameter one that meets the requirements of the above, and in the case of a hole-saw-shaped drill as shown in Japanese Utility Model Laid-Open No. 58-106198, disc-shaped chips are produced after drilling, and one branch Each time the hole is drilled, the device must be taken out to remove the chips, resulting in poor work efficiency.

The present invention has been made in view of the above circumstances, and it is possible to perforate the inner lining material to the full extent of the branch pipe without damaging the pipe line and the inner lining material, and to prevent the damage due to chips. An object of the present invention is to provide a piercing device for a lining material.

Means for Solving the Problems The present invention provides a punching device in which a main body moving in a pipe is provided with a rotary perforated body which is rotated by a rotary shaft in a radial direction of the pipe so as to project and retract in the direction of the rotary shaft. The rotary perforated body has a plurality of perforated blades in which substantially triangular cutting blades are juxtaposed in the radial direction of the rotary body on the upper surface of a disk-shaped rotary body whose center is smaller than the inner diameter of the branch pipe and bulges in the center. Is provided so as to radially project.

The drawings show the punching device of the present invention. In this punching device 1, 2 is a sliding member which is slidably moved by the sliding member 2 along the inner surface of the pipeline in the length direction of the pipeline.

Frames 3 and 3'are attached to the sliding member 2, and the frames 3 and 3'are attached to the sliding member 2 so as to be movable up and down by oil jacks 4 and 4 '.
It is guided by sliding bosses 5 and 5'provided on the frames 3 and 3 '.

Outriggers 6 and 6'are provided on the upper portions of the frames 3 and 3 ', and an actuator 7 is fixed to the rear portions thereof.

9 is a main body. The body 9 is supported by the frames 3 and 3'and is attached to the tip of the actuator 7,
The actuator 7 enables sliding in the front-rear direction with respect to the frames 3, 3'and rotation about a line parallel to the axis of the conduit as a rotation axis. An oil motor 10 is attached to the main body 9, and a television camera 8 is attached to the front portion of the main body 9 so as to be rotatable back and forth.

Reference numeral 11 denotes a gear rotatably supported on the main body 9 at its shaft portion 12 via a ball bearing 13, and the gear 11 is moved by the bevel gears 14 and 15 in the radial direction of the pipeline by the oil motor 10. The shaft is configured to be driven with the shaft as a rotating shaft, and the gear portion 16 of the gear 11 thereof projects above the main body 9.

Reference numeral 17 denotes a cylindrical bottomed hole formed parallel to and adjacent to the rotation axis of the gear 11, and a piston rod 18 is provided upright at the center of the bottom of the bottomed hole 17. A bottomed cylindrical spindle 19 is slidably fitted on the piston rod 18 in the vertical direction. An O-ring 20 is fitted on the outer periphery of the upper end of the piston rod 18 to seal between the spindle 19 and the spindle 19.
O-rings 22 and 23 are also fitted to the outer circumference and the inner circumference of the collar 21 fitted to the lower end of 19, respectively, and seal between the collar 21 and the spindle 19 and the piston rod 18, respectively.

Two hydraulic passages 24, 25 are formed in the piston rod 18, one hydraulic passage 24 opens to the upper end surface of the piston rod 18, and the other hydraulic passage 25 is a piston rod below the O-ring 20. It has openings on 18 sides. By feeding pressure oil into either the hydraulic passage 24 or the hydraulic passage 25, the spindle 19 can be slid upward or downward with respect to the piston rod 18 by the hydraulic pressure.

A cylindrical spindle gear 26 is fitted around the outer periphery of the spindle 19, and the spindle gear 26 is a ball bearing.
It is rotatable with respect to the spindle 19 via 27. On the outer periphery of the spindle gear 26, vertically long teeth 28 are engraved over substantially the entire length of the spindle gear 26, and the teeth 28 mesh with the gear portion 16 of the gear 11. There is. Thus, this spindle gear 26 is
Driven by gears 11 by 10, spindle 19
It is designed to move up and down with it.

Reference numeral 29 is a rotary perforated body fixed to the upper surface of the spindle gear 26. The rotary perforated body 29 has a perforated blade 31 planted on the upper surface of a rotary body 30 having a swelled center and a gentle taper.

The piercing blade 31 is formed by arranging a plurality of substantially triangular cutting blades 32 in parallel, and the piercing blades 31 are arranged radially from the center of the rotating body 30. In the example shown in the drawings, the punching blades 31 are arranged in pairs symmetrically with respect to the center of the rotating body 30, and the cutting blades 32 of the paired punching blades 31 are formed to be staggered from each other. Has been done.

In FIG. 1, 33 is a pipe line, 34 is a branch pipe, and 35 is an lining material lined on the inner surface of the pipe line 33.

In order to perforate the lining material 35 at the branch portion of the conduit 33 using this device, first, the perforation device 1 is inserted into the lined conduit 33, and the inside of the conduit 33 is moved by the rod 36 or the like. Make progress. The television camera 8 advances the punching device 1 while exploring the inner surface of the pipe 33, and stops the movement of the punching device 1 when the rotary punching body 29 reaches the position of the branch passage 34. The punching device 1
The means for advancing is not limited to pushing with the rod 36, and may be pulled forward from the front with, for example, a wire.

Now activate the oil jacks 4, 4'to activate the frames 3, 3 '.
Is pushed up to press the outriggers 6, 6 ′ against the inner surface of the upper portion of the conduit 33, and the punching device 1 is fixedly supported to the conduit 33. This state is shown by the solid line in FIG.

Then, if necessary, the actuator 7 is actuated to move the main body 9 back and forth and rotate the rotary perforated body.
The center of 29 is approximately aligned with the center of branch pipe 34. At this time, by making the center of rotation of the main body 9 by the actuator 7 coincide with the center line of the pipe line 33 in a state where the outriggers 6 and 6 ′ are pressed against the upper part of the pipe line 33, Rotating perforated body 29 and pipe when rotating 9
Since there is no change in the positional relationship with the inner surface of 33, it is possible to always perforate in a constant state, which is desirable.

When the oil motor 10 is driven in this state, the bevel gear 1
The gear 11 rotates via 4, 15 and the spindle gear 26 meshing with the gear 11 also rotates, so that the rotary perforated body 29 fixed to the spindle gear 26 rotates. Therefore, when pressure oil is fed into the one hydraulic passage 24 and a hydraulic pressure is applied between the upper surface of the piston rod 18 and the spindle 19, the hydraulic pressure causes the spindle 19 to move upward with respect to the piston rod 18, Along with this, the spindle gear 26 moves upward while being rotationally driven by the gear 11. Further, the rotary perforated body 29 fixed to the spindle gear 26 also moves upward.

Then, by the punching blade 31 on the upper surface of the rotary punched body 29, the branch pipe
The lining material 35 closing the 34 is cut, and the rotary perforated body 29
A through hole having a diameter corresponding to the diameter of the rotating body 30 is formed. Since the upper surface of the rotating body 30 has a loose taper shape in which the central portion bulges, the lining material 35 at the branching portion is to be perforated in order from the central portion.
Since the cutting debris 35 falls from the upper surface of the rotating body 30 downward and does not remain on the upper surface of the rotating body, the drilling efficiency is good.

Further, as described above, by forming the cutting blades 32 of the pair of punching blades 31 on the upper surface of the rotating body 30 in a staggered manner, the cutting portions of the cutting blades 32 of these punching blades 31 complement each other, The lining material 35 can be efficiently and quickly cut and punched.

Next, while discharging the pressure oil from the hydraulic path 24, the other hydraulic path
When pressure oil is fed to 25 and hydraulic pressure is applied between the outer circumference of the piston rod 18 and the inner circumference of the spindle 19, the spindle
19 moves down with respect to the piston rod 18, and accordingly, the spindle gear 26 also moves down while rotating and is housed in the bottomed hole 17 again.
29 also moves down and escapes from the perforated hole.

Then, the drive of the oil motor 10 is stopped and the spindle gear
The rotation of 26 is stopped, and the oil jacks 4 and 4'are operated to move the frames 3 and 3'downward with respect to the sliding member 2. This releases the fixing of the punching device 1 to the conduit 33,
The piercing device 1 can be moved again into the conduit 33, and the lining material 35 can be pierced by the same operation at the next branch portion.

EFFECTS OF THE INVENTION According to the present invention, the rotary perforated body 29 has a swelled body at the center.
Since the perforation blade 31 is planted on the upper surface of the 30, the rotary perforation body 29 is rotated and brought into contact with the lining material 35. A through hole having a diameter corresponding to the diameter of the body 29 can be formed. Therefore, by using the rotary perforated body 29 corresponding to the diameter of the branch pipe 34, a through hole that fills the opening of the branch pipe 34 can be formed, and the pipe line 33 and the lining material 35 are not damaged. .
Further, since the rotary drilling body 29 is one in which the drilling blade 31 is planted on the upper surface of the rotary body 30, it can have a larger diameter and a lower height than a conical drill. Moreover, the stroke for raising the rotary perforated body 29 is small, and the perforation apparatus 1 can be made compact.

Further, according to the present invention, since the perforating blade 31 implanted on the upper surface of the rotating body 30 cuts and perforates the entire surface of the lining material 35 at the branch portion, the cut lining material 35 has a fine powdery or granular shape. Therefore, it does not leave the disc-shaped chips like the hole saw in the pipe 33. Therefore, powdery or granular waste can be easily removed by washing with water or the like in a later step.

Further, in general, when the lining material 35 is attached to the inner surface of the conduit 33, a reaction-curable adhesive is used, but part of the adhesive enters the branch pipe 34 due to the internal pressure during lining, It may harden here and fill the branch pipe 34. In such a case, a branch pipe is used in the conventional striking tool or thermal iron type punching tool.
It is not possible to remove the hardened adhesive by penetrating into the inside of 34, and it is difficult even with a drill or a hole saw type rotary drilling tool, but the drilling tool of the present invention drills while cutting with the drilling blade 31. Therefore, the hardened adhesive as described above can be easily cut and removed.

[Brief description of drawings]

FIG. 1 is a side view of the punching device of the present invention, and FIG. 2 is an enlarged central vertical cross-sectional view of its main part. 3 to 5 show a rotary perforator according to the present invention.
The figure is a plan view, and FIGS. 4 and 5 are in FIG.
It is IV-IV sectional drawing and VV sectional drawing. 1 ... Punching device, 9 ... Main body 29 ... Rotating punching body, 30 ... Rotating body 31 ... Drilling blade, 32 ... Cutting blade

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Claims (2)

[Scope of utility model registration request] 1. A body (9) which moves in a pipe (33) is provided with a rotary perforated body (29) which is rotated by a rotation axis in a radial direction of the pipe (33) so as to project and retract in the direction of the rotation axis. In the punching device (1), the rotary punching body (29) has a substantially triangular cutting blade (29) on the upper surface of a disk-shaped rotating body (30) having a center smaller than the inner diameter of the branch pipe (34). A plurality of perforating blades (31) formed by arranging 32) in parallel in the radial direction of the rotating body (30).
A radial line projecting device for piercing the branched portion of the lined pipe. 2. The cutting blades (32) of the pair of punching blades (31), wherein the punching blades (31) are arranged in pairs symmetrically with respect to the center of the rotating body (30). ) Are formed so that they are staggered from each other, and a device for piercing a branched portion of a lined pipe line according to claim 1 characterized in that