JPH0247345Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a self-propelled device for connecting small-diameter buried pipes, especially small-diameter pipes such as hume pipes, steel pipes, and vinyl chloride pipes buried by the push-in method. The present invention relates to a device 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. perforate from the outside,
A branch pipe was connected to this perforation 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, in Japanese Patent Application Laid-Open No. 54-150718, pressurized liquid is pressurized into the bellows to compress the spring and push or release the cylinder forward, and a method for crimping the tube and the main body is described using a different method of supplying pressurized liquid. provides an intra-pipe moving device consisting of a mechanism that inflates and presses or releases a diaphragm, but since there is no means to hold the cylinder in the pipe, pressurized liquid is forced into the bellows, compresses a spring, and moves the cylinder. If pressed, the tube will tilt inside the tube, making it unstable and easily damaging the equipment attached to the tube.In addition, since the tube end is fixed in the tube by the expansion of the diaphragm, the fixing force of the tube will also be reduced. The problem was that it was weak and difficult to stabilize.

[Purpose of the invention] The purpose of the invention is to make it possible to easily connect small-diameter pipes that have been buried using the push-in burying method without excavating the ground surface as much as possible. The object of the present invention is to provide a self-propelled pipe connection device for small-diameter buried pipes that is capable of stable self-propelled operation, thereby solving the above-mentioned problems.

[Summary of the invention] The present invention has a main body that has a diameter that can be inserted into a small-diameter buried pipe and is equipped with a pipe connection means, and at least one of both ends of the main body is independent. It has a self-propelled means that rolls along the tube, a locking means provided with a plurality of locking bodies that can be pressed and released on the inner surface of the tube, and an extensible means between the independent one end portion and the main body.

[Example] A tubular main body 2 having a diameter that can be inserted into a small-diameter buried pipe 1 is provided, and at least one of both end portions of the main body 2 is independent, and a guide roller 4 and a self-propelled means are provided at both end portions. It has locking means A, A', and a telescopic means B is provided between the independent one end portion and the main body 2 to form a self-propelled moving device C.
More specifically, the locking means A and A' are provided with a plurality of guide rollers 4 around the circumference of the pipe portion 3, and a cam 6 is movable in the longitudinal direction of the main body 2 by the operation of a hydraulic cylinder 5. 6 has multiple cam grooves 6
A pin 8 of a lock pawl 7, which is a lock body, is inserted into the cam groove 6a, and when the cam 6 moves due to the operation of the hydraulic cylinder 5, it is guided by the cam groove 6a and the lock pawl 7 is inserted through the pin 8. It comes out and presses against the inner wall surface of the small diameter buried pipe 1 or releases it. The telescoping means B includes a hydraulic cylinder 9 in the pipe portion 3 of one locking means A on the independent side, and a piston 9a in the main body 2.
By operating the hydraulic cylinder 9 in a locked state in which the lock pawl 7 of one locking means A is pressed against the inner wall of the buried pipe 1, the main body 2 is connected to the guide roller 4 of the other locking means A' side. Extend through.

Then, in the small diameter buried pipe 1, the lock pawl 7 is extended by the operation of the hydraulic cylinder 5 to lock one locking means A, and after the lock pawl 7 is retracted to release the other locking means A', the locking pawl 7 is extended and retracted. Locking means by operating the hydraulic cylinder 9 of means B
The guide roller 4 of A' is rolled on the inner surface of the tube to
1 pitch, and then conversely locks the locking means A', releases the locking means A, and reduces the piston 9a of the hydraulic cylinder 9 by 1 pitch via the guide roller 4 on the side of the locking means A. By repeating this operation, the main body 2 is moved intermittently by itself to a predetermined location at a predetermined pitch.

Next, to explain an example of the use of this device, as shown in Fig. 3, it is used for pipe connection with a drilling device D that moves up and down while rotating a drill cutter 10 into a tubular body 2 having a diameter that can be inserted into a small-diameter buried pipe 1. Pipe connecting means E for raising and lowering the receiver 12 provided with the sleeve 11 are arranged in parallel at appropriate intervals, and locking means A, A' for the inner wall of the small-diameter buried pipe 1 are provided on both sides of the main body 2 via bearings. The main body 2 is provided so as to be freely rotatable in the circumferential direction.
A telescopic means B and a circumferential rotation device F for the tube 2 are interposed between the locking means A and one of the locking means A, and one of the locking means A can be locked in the small-diameter buried pipe 1 as shown in FIG. 4A. Then, after releasing the other locking means A', the extensible means B is expanded by a predetermined dimension, and then the locking means A' is locked, and the locking means A is released, and the operation is repeated to reduce the same dimension as described above. The main body 2 is moved by itself at regular intervals to a predetermined position.

As shown in Fig. 4B, both locking means A and A' are locked, and the circumferential rotation device F is operated to move the drill cutter 10 in a direction that does not interfere with other buried objects.
Rotate the main body 2 as shown in FIGS. 5A and 5B so that the Drill cutter 10 by operating drilling device D
The drill moves up while rotating to drill into the buried pipe 1 from the inside.

As shown in FIG. 4C, the drill cutter 10 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 means E fits into the perforated portion 1a.

As shown in FIGS. 4D and E, by drilling a small diameter hole a in the ground surface relative to the perforated portion 1a, inserting the branch pipe 13 into the hole a, and operating the pipe connecting means E to raise the receiver 12. The sleeve 11 is fitted into the perforation 1a of the buried pipe 1, and at the same time the branch pipe 1 is inserted into the sleeve 11.
3 to connect the branch pipe 13 to the buried pipe 1.

As described above, the self-propelled moving device C of the main body 2 can automatically drill holes at desired locations in the small-diameter buried pipe 1 from the inside, and connect the branch pipes 13 from the inside, so that the ground surface can be excavated without waste. There's no need.

In addition, the self-propelled moving device C is provided with a plurality of guide rollers 4 as self-propelled means at both ends of the main body 2, and the guide rollers 4 roll on the inner surface of the small diameter buried pipe 1 by the operation of the expansion and contraction means B. Since the main body 2 guides the movement of the main body 2, the main body 2 can move stably along the pipe axis without always tilting inside the pipe 1, and the pipe connecting means E attached to the main body 2 can be damaged. There is no need to worry about doing so. Furthermore, since the locking means A and A' provided at both ends of the main body 2 are equipped with a plurality of lock claws 7, which are lock bodies that can be pressed against the inner surface of the tube 1 and released, the plurality of lock claws 7 can be pressed against the inner surface of the tube 1. By pressing, the main body 2 can be securely fixed with a strong force, the main body 2 can be moved in a stable state, and the pipe connecting process can be performed accurately with the main body 2 fixed to the pipe 1. It has the effect of being able to

The drilling device D includes a spline 17 that allows the drill cutter 10 to be rotated by a hydraulic motor 15 and moved up and down by a hydraulic cylinder 16. The pipe connection means E includes a hydraulic cylinder 18 for raising and lowering the receiver 12. In the circumferential rotation device F, a drive gear 20 of a hydraulic motor 19 disposed on the main body 2 side is meshed with a gear 21 on one locking means A side. The pipe connecting means E is to insert the sleeve 11 when the buried pipe 1 or the branch pipe 13 is a fume pipe, or by welding if it is a steel pipe, and if it is a vinyl chloride pipe, it is shown in Fig. 6A, As shown in B, thermoplastic processing is performed. 22 is an encoder that measures the rotation angle of the main body 2 in the circumferential direction. The distance between the punching device D and the pipe connecting means E is set to be an integral multiple of the pitch of self-propelled movement of the main body 2. In that case, the main body 2 equipped with the drilling device D is self-propelled within the small diameter buried pipe 1 to a predetermined position, and the main body 2 is moved as needed.
The small-diameter buried pipe 1 may be rotated in the circumferential direction and the small-diameter buried pipe 1 is perforated from the inside by the perforating device D, and then the branch pipe 13 may be connected to the perforated portion 1a by an appropriate pipe connecting means.

[Effects of the invention] The present invention has a main body that has a diameter that can be inserted into a small-diameter buried pipe and is equipped with a pipe connection means, and at least one of both ends of the main body is independent. It has a self-propelled means that rolls along the tube, and a locking means that has a plurality of locking bodies that can be pressed and released on the inner surface of the tube, and has an extensible means between the independent end portion and the main body, and has a locking means that can be pressed and released. It is used to make it possible to easily connect small-diameter pipes that have been buried without excavating the ground surface as much as possible using the underground construction method. A self-propelled device for connecting pipes can be provided.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the self-propelled moving device, Fig. 2 is a sectional view of the locking means, Fig. 3 is a construction state diagram using the device of the present invention, Figs. 4 A to E are construction state diagrams showing the construction order, 5A and 5B are diagrams showing the state of rotation in the circumferential direction of the main body, and FIGS. 6A and 6B are sectional views showing the state of plastic working. 1...Small diameter buried pipe, 2...Main body, 4...Guide roller (self-propelled means), 7...Lock claw (lock body), A, A'...Lock means, B...Extensible means,
C...Self-propelled moving device, E...Pipe connection means.

Claims (1)

[Scope of utility model registration request] A main body having a diameter that can be inserted into a small-diameter buried pipe and equipped with a pipe connection means is provided, and at least one of both end portions of the main body is independent, and a self-propelled means that rolls along the inner surface of the pipe and a self-propelled means that rolls along the inner surface of the pipe are provided. For connecting small-diameter buried pipes, the locking means has a plurality of locking bodies that can be pressed and released on the inner surface of the pipe, and has a telescopic means between the independent end portion and the main body. Self-propelled device.