JPH081765Y2 - 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.

2. Description of the Related Art As a device for perforating a lining material for this purpose,
For example, Kokai 56-158588, Kokai 56-158590, Kokai 56-158591, Kokai 57-48391,
JP 57-46189, JP 58-22209, JP
58-27009, JP 58-106198, JP 56-14
Those described in JP-A-1491, JP-A-61-179724 and the like are known.

These things, although there are some changes in the structure, respectively, roughly, the punching device has a function of advancing in the pipeline, the punching device has a punched body such as a punch or a drill, Further, it has a function of finely adjusting the position of the punched body in the circumferential direction so as to match the punched body with the position of the branch portion, and has a television camera for confirming the punching position and the drilling state. Then, the perforation device is inserted into the duct, the perforated body is aligned with the branch portion, and the lining material at the branch portion is perforated from the inside by the perforated body.

Problems to be Solved by the Invention However, in these devices, the punching device is unstable because it punches while being supported on the bottom surface of the pipeline, and the drilling device falls or the drilling position shifts. There is a fear. In particular, when the branch pipe is formed on the upper surface of the conduit, there is not much problem, but when the branch pipe is provided on the side surface of the conduit, it is difficult to perforate. That is, the piercing device is naturally supported on the lower surface of the pipeline, and if the piercing body is laterally directed to pierce the lining material in that state, the entire device falls due to the reaction force during piercing. Will be lost.

A sled or rolling wheels are arranged in the entire circumferential direction from the punching device body,
There are some that support the entire circumference of the pipeline, but in order to follow the irregularities on the inner surface of the pipeline and the diameter fluctuation, it is necessary to install these sleds and rolling wheels so that they can retract from the main body,
The device cannot be stably supported in the conduit during drilling.

Further, in order to allow the drilling device to pass through the conduit regardless of the diameter variation of the conduit and the unevenness of the inner surface, it is necessary to make the drilling device sufficiently smaller than the inner diameter of the conduit, There is a considerable distance between the perforated body and the inner surface of the conduit. Therefore, in order to perforate the lining material, it is necessary to raise the perforated body beyond the interval, which makes it difficult to set the position of the perforated body and makes the perforated body unstable. JP-A-61-179724 discloses that the legs are extended at the lower part of the punching device at the punching position and the punching device is raised.
If this is done, the punching device becomes more unstable during punching, and there is a risk of falling.

The present invention has been made in view of the above circumstances, and the punching device is firmly supported on the inner surface of the conduit at the punching position to always stably punch the liner, and the punching position can be set very easily. It is an object of the present invention to provide a device that can be used.

Means for Solving the Problems In the present invention, a frame is provided on a base that moves in a pipe so as to be movable up and down, and an outrigger that is in contact with an inner surface of the pipe is attached to an upper portion of the frame. Attached to the main body of the drilling device so that the main body of the drilling device can be rotated by a rotary shaft parallel to the axis of the pipe and slidable in the length direction of the pipe, and the body of the drilling device can rotate perpendicularly to the center of the pipe. It is characterized in that a perforated body rotated by a shaft is slidably attached along the rotation axis.

The drawings show a punching device used in the present invention. In this punching device 1, 2 is a base, and the base 2 slides along the inner surface of the pipe in the length direction of the pipe to move the drilling device 1.

Frames 3 and 3'are attached to the base 2, and the frames 3 and 3'are attached to the base 2 so as to be movable up and down by oil jacks 4 and 4'and slide. Guided by bosses 5, 5 '.

And outriggers 6,6 'are on the upper part of this frame 3,3'.
Is provided, and the actuator 7 is fixed to the rear portion.

9 is a punching device body. The punching device main body 9 is supported by the frames 3 and 3'and is attached to the tip of an actuator 7, which is slidable in the front-rear direction with respect to the frames 3 and 3'by the actuator 7, and It can be rotated about a line parallel to the axis of the pipe as a rotation axis. An oil motor 10 is attached to the punching device body 9.
Is attached, and the television camera 8 is attached to the front part so as to be rotatable back and forth.

Reference numeral 11 denotes a gear rotatably supported on the boring machine body 9 via a ball bearing 12, and the gear 11 is driven by the oil motor 10 by bevel gears 13 and 14, The gear portion 15 of the gear 11 projects above the punching device body 9.

Reference numeral 16 denotes a piston rod provided in parallel with the rotation axis 17 of the gear 11 and fixed to the punching device main body 9, and a spindle 18 is vertically slid on the piston rod 16 with respect to the piston rod 16. It is movably fitted. An O-ring 19 is fitted on the outer periphery of the upper end of the piston rod 16 to seal the space between the spindle 18 and the O-ring on the inner and outer periphery of the collar 20 fitted to the lower end of the spindle 18. 21 and 22 are fitted, and piston rod 1
The space between 6 and the spindle 18 is sealed.

Two hydraulic passages 23 and 24 are formed in the piston rod 16, one hydraulic passage 23 opens to the upper end surface of the piston rod 16, and the other hydraulic passage 24 is a piston rod below the O-ring 19. It has openings on 16 sides. Then, by feeding pressure oil to either the hydraulic passage 23 or the hydraulic passage 24,
The hydraulic pressure allows the spindle 18 to slide upward or downward with respect to the piston rod 16.

A spindle gear 25 is fitted on the outer periphery of the spindle 18, and the spindle gear 25 is rotatable with respect to the spindle 18 via a ball bearing 26. Thus, the spindle gear 25 is attached to the outer periphery of the spindle gear 25.
Long teeth 27 are engraved on the top and bottom over the entire length of Noho,
The teeth 27 mesh with the gear portion 15 of the gear 11.

Reference numeral 28 is a rotary perforated body fixed to the upper surface of the spindle gear 25. The rotary perforated body 28 is substantially disc-shaped with a high center and a gentle taper, and a perforating blade 29 is planted on the upper surface thereof.

Thus, by using this device, the lining material 31 at the branch portion of the pipe 30
In order to pierce a pipe, first, the piercing device 1 is lined with a liner.
It is inserted into the pipe 30, and the rod 32 or the like advances the pipe 30. The perforation device 1 while exploring the inner surface of the conduit 30 with the TV camera 8.
When the rotary perforated body 28 almost reaches the position of the branch pipe 33, the advance of the perforation apparatus 1 is stopped. This state is shown by the solid line in FIGS. 2 and 3. The position of the rotary perforated body 28 does not need to be exactly aligned with the branch pipe 33. Further, as means for advancing the punching device 1, a rod is used.
It is not limited to the one pushed by 32, and may be pulled from the front with a wire or the like to be advanced.

Now activate the oil jacks 4, 4'to activate the frame 3,
3'is pushed up and the outriggers 6 and 6'are pressed against the inner surface of the upper portion of the conduit 30, so that the punching device 1 is fixedly supported on the conduit 30. This state corresponds to the solid line in FIG. 1, the chain line A in FIG.
It is shown in phantom and in FIG.

Next, the actuator 7 is operated to operate the punching device body 9
Is moved back and forth as indicated by the chain line B in FIG. Although FIG. 2 shows the moving state from the position before the frames 3 and 3'are moved upward with respect to the base 2, in reality, the frames 3 and 3'are moved from the moved position. . Further, if necessary, the punching device main body 9 is rotated with respect to the frames 3, 3'as shown in FIG. 5 so that the center of the rotary punching body 28 is substantially aligned with the center of the branch pipe 33. Outrigger 6,
It is desirable that the center of rotation of the punching device main body 9 by the actuator 7 be substantially coincident with the center of the pipeline 30 in the state where the 6'is pressed against the upper portion of the pipeline 30.

When the oil motor 10 is driven in this state, the bevel gear
The gear 11 is rotated via 13, 14, and the spindle gear 25 meshing with the gear 11 is rotated, so that the spindle gear 25
The rotary perforated body 28 fixed to is rotated. Therefore, when pressure oil is fed into the one hydraulic passage 23 and hydraulic pressure is applied between the upper surface of the piston rod 16 and the spindle 18, the spindle 18 moves upward with respect to the piston rod 16, and accordingly The spindle gear 25 moves upward while being rotationally driven by the gear 11. Further, the rotary perforated body 28 fixed to the spindle gear 25 also moves upward.

Then, the lining material 31 closing the branch pipe 33 is cut by the piercing blade 29 on the upper surface of the rotary piercing body 28,
A through hole having a diameter corresponding to the diameter of 28 is formed. Then, the rotary perforated body 28 penetrates the through hole and enters the branch pipe 33. This state is shown by the chain line C in FIG. 2 and FIG.

Next, pressure oil is fed into the other hydraulic passage 24, and when hydraulic pressure is applied between the outer circumference of the piston rod 16 and the inner circumference of the spindle 18, the spindle 18 moves downward with respect to the piston rod 16. Along with this, the spindle gear 25 also moves downward while rotating, and further, the rotary perforated body 28 also moves downward together with the spindle gear 25 and comes out of the through hole.

Then, the drive of the oil motor 10 is stopped to stop the rotation of the spindle gear 25, and the oil jacks 4 and 4'are operated to move the frames 3 and 3'downward relative to the base 2. As a result, the fixing of the punching device 1 to the duct 30 is released, the punching device 1 can be moved in the duct 30 again, and the liner 31 can be punched by the same operation at the next branch portion.

Effect of the Invention According to the present invention, most of the device is moved upward at the position to be drilled, and the drilling device 1 is fixed to the conduit 30 by the base 2 and the outriggers 6 and 6 ′. Since the lining material 31 is perforated, the device is stable during perforation and there is no risk of rocking or falling due to the reaction force during perforation.

Further, since the device is moved upward for perforation, the rotary perforated body 28 is sufficiently close to the inner surface of the conduit 30 when the device is fixed. Therefore, when confirming the punching position with the television camera 8, the positioning is easy and the rotary punching body 28 can be punched without being excessively moved, so that the punching accuracy is good. Moreover, even if the inner surface of the conduit is uneven or the diameter changes, the distance between the rotary perforated body 28 and the inner surface of the conduit is constant when the device is fixed to the inner surface of the conduit, and the condition of perforation is confirmed by the TV camera 8. There is little error when doing.

Further, according to the present invention, the frame 3 to which the main body 9 of the punching device is attached is provided so as to be movable up and down with respect to the base 2, and is fixed to the inner surface of the conduit 30 by the outriggers 6 on the upper portion of the frame 3. At some time, the rotary perforated body 28 moves upward and approaches the inner surface of the conduit 30, so that the upward movement stroke of the rotary perforated body 28 required for perforating the branch portion can be small. Therefore, the mechanism for moving the rotary perforated body 28 up and down is small, and the device is compact.

Moreover, when the punching device 1 of the present invention is inserted into the conduit 30, the punching device main body 9 moves downward and is in a lower position, so that the center of gravity is low and stable, and the drilling device inadvertently falls down during insertion. There is no fear.

Further, as described above, by making the center of rotation of the punching device main body 9 by the actuator 7 substantially coincide with the center of the duct 30, even if the punching device main body 9 is rotated, the rotary punch 28 and the inner surface of the duct 30 are separated. Since the rotary perforated body 28 is always vertically abutted against the lining material 31 while the space is not changed, the rotary perforated body 28 is always perforated in a constant state.

The rotary perforated body 28 used in the present invention has a perforated blade 29 on the upper surface as shown in the drawing, so that the perforated lining material becomes powdery or granular and is dispersed in the pipeline. It is preferable because it can be washed with water or the like. However, the present invention is not limited to this, and it is also possible to use a hole saw, for example. However, in this case, since the lining material is cut out into a disk shape by the hole saw, it is necessary to extract it from the pipe line by another means.

[Brief description of drawings]

FIG. 1 is a central longitudinal sectional view showing a state in which a branch portion of a pipeline is perforated according to the present invention. 2 is a central longitudinal sectional view showing an example of a punching device used in the present invention, FIG. 3 is a III-III sectional view thereof, and FIG. 4 is an IV-IV sectional view thereof. Fifth
6 and 6 are sectional views taken along line IV-IV showing the process of operation of the present invention. 1 ... Punching device, 2 ... Base 3,3 '... Frame, 6,6' ... Outrigger 9 ... Punching device body, 28 ... Rotating drilling body 30 ... Pipe line, 31 ... Lining material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-52-135568 (JP, A) JP-A-61-44509 (JP, A) Jikken-Sho 60-15037 (JP, Y2)

Claims (2)

[Scope of utility model registration request] 1. A frame (3, 3 ') is vertically movable on a base (2) which moves in the conduit (30), and an inner surface of the conduit is provided on the upper part of the frame (3, 3'). The abutting outriggers (6, 6 ') are attached, and the punching device body (9) can be rotated with respect to the frame (3, 3') by a rotation shaft parallel to the axis of the pipe line (30). A rotary perforated body (28), which is attached so as to be slidable in the longitudinal direction of the pipe line (30) and which is rotated by a rotary shaft perpendicular to the axis of the pipe line (30), is attached to the perforation device standard (9). An apparatus for piercing a branched portion of a lined pipe lined so as to be slidable along an axis 2. The frame (3, 3) with respect to the base (2).
3 ') is moved up to bring the outriggers (6, 6') into contact with the inner surface of the conduit (30), the rotary shaft of the punching device main body (9) with respect to the frame (3, 3 ') is It is characterized in that it is located in the center of the hozu line (30),
Claim for utility model registration Claims 1