JPH0415041B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to drilling and pipe connection methods for small-diameter buried pipes, particularly for small-diameter pipes such as hume pipes, steel pipes, and vinyl chloride pipes buried by the push-in method. This invention relates to a construction method that makes it possible to connect pipes without using excavation work as much as possible.

[Conventional technology and its problems] In order to connect branch pipes connected to each home to this type of small-diameter buried pipe, it is necessary to excavate the ground surface and install the small-diameter buried pipe in a position where it will not interfere with other buried objects. Piercing from the outside,
A branch pipe was connected to this hole from the outside. For this reason, it required work to excavate the ground surface, which was inconvenient for construction in urban areas.

On the other hand, as in Japanese Utility Model Application Publication No. 57-95739, for example, by installing a machine frame that holds a cutter equipped with a rotational drive mechanism and a feed mechanism inside the buried pipe via a fixture, it is possible to cut the ground surface. A drilling machine is disclosed that can perform drilling work from the inner peripheral side of a buried pipe at a desired position without digging.

However, these conventional drilling machines have the trouble of having to move the machine frame to another location after drilling, and then connect the pipes. This method had the drawback of increasing the number of man-hours and significantly reducing efficiency because the drilling machine had to be moved by applying external force using a separate drive device while repeatedly attaching and detaching the fixings. .

[Objective of the Invention] The object of the present invention is to provide a small-diameter underground pipe that can be efficiently and easily connected to a small-diameter pipe buried without excavating the ground surface using the push-in burial method. The object of the present invention is to provide a drilling/pipe connection method to solve the above problems.

[Summary of the Invention] The present invention allows a main body, which is inserted into a small-diameter buried pipe and is equipped with a drilling device and a pipe connecting device, to move by itself to a predetermined position, and if necessary, rotates the main body in the circumferential direction to perform the drilling. Drilling the small-diameter buried pipe from the inside with a setting device, and arranging the distance between the drilling device and the pipe connecting device to be an integral multiple of the pitch of self-propelled movement of the main body, The method involves moving the pipe connecting device to the drilling location to connect the pipes.

[Example] As shown in Fig. 1, a receiver is provided with a tubular body 2 having a diameter that can be inserted into a small-diameter buried pipe 1, a drilling device A that moves up and down while rotating a drill cutter 3, and a pipe connection sleeve 4. Pipe connection device B for lifting and lowering 5
are arranged in parallel at an interval that is an integer multiple of the pitch of self-propelled movement of the main body 2, which will be described later, and locking devices C and C' for the inner wall of the small-diameter buried pipe 1 are installed on both sides of the main body 2 so as to move in the circumferential direction via bearings. A telescopic device D and a circumferential rotation device E for the tube 1 are interposed between the main body 2 and one lock device C, and a second
As shown in Figure A, after locking one locking device C and releasing the other locking device C' in the small-diameter buried pipe 1, extend the telescopic device D by a predetermined amount, and then conversely lock the locking device C'. The operation of releasing the device C and reducing the same size as described above is repeated to move the main body 2 by itself at regular intervals to a predetermined location.

As shown in Fig. 2B, both locking devices C and C' are locked, and the circumferential rotation device E is operated to move the main body 2 so that the drill cutter 3 faces in a direction that will not interfere with other buried objects. , B. The drilling device A is operated and the drill cutter 3 is rotated and raised to drill into the buried pipe 1 from the inside.

As shown in FIGS. 2C and 2D, the drill cutter 3 is returned to its original position, and the main body 2 is moved by itself in the same manner as described above so that the pipe connecting device B fits into the six holes.

As shown in Fig. 2 E and F, a small diameter hole 7 is drilled on the ground surface relative to the perforated portion 6, a branch pipe 8 is inserted into the hole 7, and the pipe connecting device B is operated to raise the receiver 5. The sleeve 4 is fitted into the perforation 6 of the buried pipe 1, and at the same time, the branch pipe 8 is press-fitted into the sleeve 4 to connect the branch pipe 8 to the buried pipe 1.

As described above, the self-propelled movement of the main body 2 allows the small-diameter buried pipe 1 to be punched automatically from the inside at a desired location, and the branch pipe 8 can be connected from the inside, eliminating the need to unnecessarily excavate the ground surface. It has an excellent effect on pipe connections in cities.

Moreover, by arranging the drilling device A and the pipe connecting device B at an interval that is an integral multiple of the pitch of self-propelled movement, the main body 2
Simply move the pipe connecting device B to the specified number of pitches.
Since the branch pipe 8 quickly moves to the position of the perforation 6, it becomes possible to connect the branch pipe 8 to the perforation 6 efficiently and easily.

In this case, it is necessary to make a hole for the tube insertion point.

Note that instead of self-propelled movement by the telescoping device D provided with the hydraulic cylinder 9, sliding movement by drive wheels or the like may be used. The drilling device A consists of a spline 11 that allows the drill cutter 3 to be rotated by a hydraulic motor 10 and moved up and down by a hydraulic cylinder 10a while rotating the drill cutter 3. The pipe connection device B includes a hydraulic cylinder 10b for raising and lowering the receiver 5. The locking devices C and C' are equipped with a plurality of guide rollers 13, and a plurality of locking pawls 13a are provided via a cam etc. by sliding of the hydraulic cylinder 12.
is moving forward and backward toward the inner wall surface of the buried pipe 1. The circumferential rotation device E is a hydraulic motor 1 disposed on the main body 2 side.
The drive gear 15 of No. 4 is meshed with the gear 16 on one side of the lock device C. Pipe connection device B is buried pipe 1,
If the branch pipe 8 is a fume pipe, the sleeve 4 shall be inserted, and if it is a steel pipe, it shall be welded, and if it is a vinyl chloride pipe, it shall be subjected to high frequency or Thermoplastic processing using ultrasonic waves may also be performed. 17 is an encoder that measures the rotation angle of the main body 2 in the circumferential direction. In that case, the main body 2 equipped with the drilling device A is self-propelled within the small diameter buried pipe 1 to a predetermined position, and the main body 2 is moved as necessary.
may be rotated in the circumferential direction, and the small-diameter buried pipe 1 may be bored from the inside by the drilling device A, and then the branch pipe 8 may be connected to the hole 6 by an appropriate pipe connecting device.

[Effects of the Invention] The present invention allows a main body, which is inserted into a small-diameter buried pipe and is equipped with a drilling device and a pipe connecting device, to move by itself to a predetermined position, and if necessary, rotates the main body in the circumferential direction. The small-diameter buried pipe is drilled from the inside by a drilling device, and the distance between the drilling device and the pipe connecting device is arranged to be an integral multiple of the pitch of self-propelled movement of the main body. , to connect the pipe by moving the pipe connecting device to the drilling location, and to efficiently and easily connect the small diameter pipe buried without excavating the ground surface using the push-in burial method. It is possible to provide a method for drilling and connecting small-diameter buried pipes.

[Brief explanation of drawings]

Fig. 1 is a construction state diagram using the construction method of the present invention, Fig. 2 A to F is a construction state diagram showing the construction order, and Fig. 3 A,
B is a circumferential rotation state diagram of the main body, and FIGS. 4A and 4B are sectional views showing the plastic working state. 1...Small diameter buried pipe, 2...Main body, A...Drilling device,
B...Pipe connection device, C, C'...Lock device, D...Expansion device, E...Rotation device.

Claims (1)

[Claims] 1. The main body, which is inserted into a small-diameter buried pipe and equipped with a drilling device and a pipe connecting device, moves by itself to a predetermined position,
If necessary, the main body is rotated in the circumferential direction and the small-diameter buried pipe is drilled from the inside by the drilling device, and the distance between the drilling device and the pipe connecting device is adjusted so that the main body moves by itself. A method for drilling and connecting small-diameter underground pipes, characterized in that the pipe connection device is moved to the drilling location to connect the pipes so that the pitch is an integral multiple of the pitch of the pipe.