JPS6227861B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a repair device for reinforcing and repairing existing buried pipes such as gas pipes.

BACKGROUND ART Hitherto, devices for reinforcing and repairing existing buried pipes such as gas pipes have been known with various structures, and a typical one is shown in FIG.

To explain what is shown in Fig. 1, the equipment for reinforcing and repairing existing buried pipes has a bowl-shaped front bowl body 1 and a rear bowl body 2, which are provided in a convex state at an appropriate distance from the front and back. , when inserted into the pipe A, there is an annular cavity a along the inner surface of the pipe A between the two bowl bodies 1 and 2.
It is equipped with a patch car B' capable of forming a patch car B', a rotary drive device 3, and a spatula-shaped or brush-shaped adjustment tool 4 rotated by the drive device 3, and is connected flexibly to the rear of the patch car B' at an appropriate distance. a traction device D that connects the paint film adjuster C with the paint film adjuster C via the tow cable 5 to the paint film adjuster C, which connects the paint film adjuster C with the paint film adjuster C via the towing cable 5 and tows the paint film adjuster C with the paint film adjuster C, with the paint film adjuster C connected to the paint film adjuster C via the tow cable 5;
A television camera E is placed in front of the moving direction of B' with the inspection angle facing the police car, and is fixed to the towing cable 5 to communicate with the traction device D, and an image receptor F in communication with this. It is equipped with a film-forming material supplying device G that connects to the pack car B' via a film-forming material supply hose 6 and supplies a film-forming material 7 between the front and rear bowl bodies 1 and 2, Insert the packer B' and the paint film adjuster C into the pipe A, and apply the paint film forming material 7 to the packer by the paint film forming material supply device G.
While supplying under pressure to the space a formed between the front bowl body 1 and the rear bowl body 2 of B', that is, the two bowl bodies 1 and 2 and the inner surface of the pipe A, the traction device D is used to separate the paint film from the pack car B'. Tow the adjuster C and move it to the rear bowl body 2 of the police car B'.
A coating film forming material 7 is applied to the inner surface of the tube A using the peripheral edge of the tube A to form a coating film 7', and this is further adjusted using the adjustment tool 4 of the coating film adjustment device C.

Then, the towing movement of the police car B' was carried out while observing the autopsy on TV, and at the joint A' of the pipe A, the joint A' was connected to both the front and rear bowl bodies 1 of the police car B',
2, the movement of the packer B can be temporarily stopped, and the coating film forming material 7 can be press-fitted into the seam A' to seal that part.

However, in this device, when the joint A' of the pipe A is filled with the coating film forming material 7, the joint A' is emptied by the front and rear bowl bodies 1 and 2 as shown in FIG. Since the air is sealed inside the seam A', there is no escape for the air in the seam A', and the air remains compressed by the coating film forming material 7 filled in the seam A'.
The paint film forming material 7 is joined by passing through the patch car B'.
When the pressure injected into A' is released, the compressed air breaks through the coating film 7' formed as shown in Fig. 3 and blows out, creating holes 8 in the coating film 7' and forming holes 8 in the coating film 7'. complete sealing may be prevented.

In order to prevent the rupture of the coating film that occurs at the joint portions as described above, in the existing buried pipe reinforcement and repair equipment as shown in FIG. The purpose is to exhaust the air inside.

Therefore, the present invention provides a fixing car of an existing buried pipe reinforcement and repair device, which includes inserting the fixing car into the pipe to be painted,
It is pulled and moved by a traction device, and the annular cavity formed along the inner surface of the pipe by the front bowl body and rear bowl body is connected to the joint of the pipe, and the coating film forming material supplied into the cavity is press-fitted into the joint. By providing a means to connect the joint to the pipe space in front of the packer at a part of its circumference in a state where it can be filled, the air inside the joint can be removed as the film-forming material enters the joint. is released into the pipe space in front of the packer, replacing the air in the joint with the paint film forming material.

Therefore, there is no air completely present in the joint of the pipe, or at least no air remains in the compressed state, and the air does not break the coating and blow out, thereby impeding the sealing effect of the part.

Thus, the technical task is achieved.

Furthermore, since the air within the joint is discharged into the pipe space in front of the front bowl of the pack car, there is no fear that the discharged air will affect the coating film that has already been formed.

Embodiments of the present invention will be described below based on the drawings.

In Fig. 4, B is a pack car, 1 is a front bowl body, and 2 is a rear bowl body, and these front and rear bowl bodies 1 and 2 are connected by a connecting fitting 9 with an appropriate distance maintained between them. Fixed.

The front and rear bowl bodies 1 and 2 are each made of an elastic material, such as abrasion-resistant rubber, and are formed in the shape of an approximately truncated cone with an open bottom, that is, approximately a bowl shape, and the front bowl body 1 has an opening. It is inclined with respect to the axis, as if it had been cut diagonally.

Therefore, the opening of the front bowl body 1 has a substantially elliptical shape.

The opening of the rear bowl body 2 is formed perpendicular to the axis and has a perfect circular shape.

These front and rear bowl bodies 1 and 2 are arranged coaxially with the front convex facing in the same direction, and are connected and fixed with a connecting fitting 9 with an appropriate spacing between them.

A coating film forming material passage 10 is provided in the connecting fitting 9 to connect a coating film forming material supply hose 6 that communicates with the coating film forming material supplying device G, and the coating film forming material passage 10 is provided at the front and rear parts. It communicates with a radial outlet 11 provided between the bowl bodies 1 and 2.

Reference numeral 12 designates an air pipe with air hoses 13, 13 connected to both ends, which serves as a passage for air to be supplied to the air motor, which is the rotational drive device 3 of the paint film adjuster C, which is connected to the rear of the paint film adjuster C. , are provided to penetrate the front bowl body 1 and the rear bowl body 2.

Further, 14 is a tow cable attachment portion provided on the front surface of the front bowl body 1.

Therefore, such a patch car B is used in place of the patch car B' of the existing buried pipe reinforcement and repair equipment shown in FIG. While discharging from the outlet 11 of the material passage 10 between the front and rear bowl bodies 1 and 2, the inside of the pipe A is pulled and moved by a traction device D, and the material is formed by the front and rear bowl bodies 1 and 2 and the inner surface of the pipe A. Vacant room a
As it moves, the coating film forming material 7, which is full of
form.

At this time, packer B is placed in tube A so that the opening, ie, the slope of the rear end, faces downward and diagonally forward when viewed from the side, as shown in FIG.

Therefore, in the process of moving Packer B, the lower part of the rear edge of the front bowl 1 passes through the joint A' of the pipe A, as shown in FIG. 6, but the upper part of the rear edge passes through the joint A' of the pipe A. A situation may occur where it is located behind A' or on the seam.

At this time, the joint A' communicates with the cavity a filled with the coating film forming material 7 at the lower part, and at the same time communicates with the space inside the pipe A in front of the packer B at the upper part.
That is, the obliquely formed rear edge 1' of the front bowl body 1 of the pack car B connects the empty space a formed by the front and rear bowl bodies 1 and 2 of the pack car B and the pipe A to the pipe A. Means b is configured to allow the joint A' to communicate with the pipe interior space in front of the packer B at a part of its circumference while being connected to the joint A'.

The above condition can be confirmed on the TV, so if the movement of the pack car B is temporarily stopped and the supply of the coating film forming material 7 is continued, the coating film forming material 7 will be transferred to the joint connecting to the vacant room a. Seam from bottom A′ ₁
The air flowing into A' and inside the joint A' is pushed out from the upper part of the joint _A'2 , which communicates with the inner pipe space in front of the pack car B, to the front of the pack car B, and is replaced with the air inside the joint A'. can almost completely fill the inside of seam A'.

When the air is discharged from the seam A' and the paint film forming material 7 is replaced with air, the paint film forming material 7 is removed from the part A' ₂ of the seam A' that communicates with the pipe interior space in front of the pack car B, as shown in Fig. 7. B It overflows to the front, so
All you have to do is confirm this on TV and then re-disclose the towing movement of police car B as shown in FIG.

In this way, the joint A' of the pipe A is completely filled with the film-forming material 7, and there is almost no remaining air, and even if some air remains, this air is under pressure. There is no risk of it blowing out and breaking the coating film 7'.

In the above explanation, the pack car B was placed in the pipe A so that the slope of the rear end of the front bowl body 1 faced downward and diagonally forward. It is not necessary to arrange it in this way.

Next, FIG. 10 shows another embodiment of the present invention, in which the opening of the front bowl body 1 of the police car B is formed to be perpendicular to the axis like the opening of the rear bowl body 2. In some respects, it is basically the same as the conventional police car shown in FIGS. 1 and 2, but the front side of the front bowl body 1 has a concave shape extending linearly along the entire length in the front-rear direction. A groove 15 is recessed.

Therefore, in the process of being towed and moved within the pipe A, the front bowl body 1 is moved as shown in FIG.
When the rear end is in a state where it is hooked on the front edge of the joint A' of the pipe A, the joint A' communicates with the cavity a, but also communicates with the inner space of the pipe in front of the packer B via the groove 15.

Then, if the movement of the packer B is stopped in this state and the supply of the coating film forming material 7 is continued, the air in the joint A' will flow into the groove as the coating film forming material 7 flows into the joint A'. 15 and is discharged into the pipe space in front of the police car B.

That is, the concave groove 15 in this embodiment replaces the obliquely formed rear edge 1' of the front bowl body 1 in the previous embodiment, and serves as a means b for connecting the joint A' to the inner pipe space in front of the packer B. Configure.

Therefore, the coating film forming material 7 can be filled in the joint A' without leaving any air, and even if a small amount of air remains in the joint, the air will not exist in a compressed state. , there is no risk of it breaking through the coating film 7' and blowing out.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the existing buried pipe reinforcement and repair equipment in use, and is illustrated using a conventional pipe car. FIG. 2 is a partially enlarged view of FIG. 1, and FIG. 3 is a cross-sectional view of the main part of a pipe that has been reinforced and repaired using a conventional packer. Figure 4 is a sectional view of a patch car showing an embodiment of the present invention, and Figures 5 to 8 show the reinforcement and repair work of pipe joints using the pipe car in accordance with the process. The sectional view shown in FIG. 9 is a sectional view of the main part of the pipe after the construction is completed. FIG. 10 is a sectional view of a pack car showing another embodiment of the present invention, the first
Figure 1 is a front view. Figure 12 is Figure 10, Figure 1
FIG. 2 is a cross-sectional view showing a reinforced repair state of a joint portion of a pipe using the packer shown in FIG. 1; In the figure, A...pipe, A'...joint, B...patch car, 1...front bowl body, 1'...rear end edge of front bowl body, 2...rear bowl body, 6... Paint film forming material supply hose, 9... Connecting fittings, 10... Paint film forming material passage,
11...Exit, 15...Ditch, a...Vacant room, b...
...Means for connecting the joint with the pipe space in front of the police car.

Claims (1)

[Scope of Claims] 1. A front bowl body 1 and a rear bowl, each of which has a peripheral edge made of an elastic material with an appropriate width and is formed into a bowl shape whose maximum diameter is slightly larger than the inner diameter of the pipe A to be painted. body 1 and
A coating film forming material passage 10 is connected to each other at an appropriate interval in a forward convex state via a connecting fitting 9, and a coating film forming material supply hose 6 is connected to the connecting fitting 9.
Then, in the patch car B of the existing buried pipe reinforcement/repair device, which has an outlet 11 that communicates with this passage 10 and opens between the front bowl body 1 and the rear bowl body 2, the pack car B is inserted into the pipe A to be painted. With the annular cavity a formed by the front and rear bowl bodies 1 and 2 and the pipe A to be coated connected to the joint A' of the pipe A, the joint A' is connected to one part of its circumference. A patch car for reinforcing and repairing an existing buried pipe, characterized in that a means b is provided in the front bowl body 1 for making it possible to communicate with the inner pipe space in front of the pipe car B. 2. The existing buried pipe according to claim 1, wherein the means b is the rear end edge of the front bowl body 1 whose rear part is cut obliquely and is inclined with respect to the axis. Patsucar is a reinforcement and repair equipment. 3 The above means b extends from the rear edge of the front bowl body 1 to the bowl body 1.
The reinforcement and repair device for existing buried pipes according to claim 1, characterized in that the groove 15 is formed in the front face of the front bowl body 1 and extends in the front-rear direction.