JP2518400Y2 - Watertight jig for pipes - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a watertight jig for a pipe that prevents rainwater or the like from intruding through the pipe opening when inspecting or repairing underground pipes such as gas pipes and water pipes. .

[0002]

2. Description of the Related Art In-pipe work robots running inside pipes are in widespread use for inspecting and repairing the corrosion state and welded joints of underground pipes such as gas pipes and water pipes. It is necessary to supply electric power and control signals from the outside of the pipe in order to run these pipe work robots and observe the inside with a built-in television camera. Therefore, the in-pipe work robot is connected to a power supply device or a control device installed outside the pipe by one or a plurality of cables.

When inspecting or repairing the inside of a buried pipe using this in-pipe work robot, in order to prevent rainwater and the like from entering the inside of the pipe when one day of work is completed,
A blind flange is attached to the end of the pipe to seal it. In this way, when attaching a blind flange to the pipe end and sealing it,
The blind flange cannot be attached if there is a cable connecting the robot for in-pipe work and the power supply device, etc., so remove the cable from the power supply device etc. and push it into the pipe, or carry out the in-pipe work robot outside the pipe After that, a blind flange is attached to the pipe end.

[0004]

However, although a cable can be pushed into a large-diameter pipe, it is difficult to push a cable into a small-diameter pipe. Moreover, even with a large-diameter pipe, there are many cables, and it is difficult to push a long-distance cable into the pipe.
Even if all the cables were pushed into the pipe, the work required a lot of time.

For this reason, even if the pipe has a small diameter or a large diameter, the number of cables is large, or if a cable for a long distance is used, the inside of the pipe is finished at the end of the working day. The work robot had to be carried out of the pipe, and the work robot in the pipe had to be carried into the pipe again at the start of work the next day, and the work efficiency was very poor.

The present invention has been made in order to solve the above drawbacks, and a cable connected to a robot for in-pipe work is used.
The purpose of the present invention is to obtain a watertight jig for a pipe that can seal the end of the pipe without pushing the bull into the pipe.

[0007]

A watertight jig for a pipe according to the present invention is made of an elastic member and has an outer surface formed by a tapered taper surface, and has one or more penetrating cable holding holes. Then
A seal plug that is divided into two parts centering on the cable holding hole,
The blind flange is installed upright on both sides of the U-shaped opening,
It is characterized in that it is provided with a guide portion having an inner surface having a tapered taper surface to be fitted to the outer surface of the seal plug, and a holding plate for pressing and fixing the seal plug on the guide portion.

[0008]

In this invention, the cable is clamped by the cable holding hole of the seal plug divided into two parts, and the seal plug is guided from the U-shaped opening of the blind flange to the guide part. insert.
The seal plug inserted in the guide part is pushed into the guide part by the holding plate, and the taper surface of the guide part presses the outer surface of the seal plug, and between the guide part and the seal plug and the case. Seal between the bull and the seal stopper. In this state, the blind flange is attached to the flange at the end of the pipe to completely seal the inside of the pipe.

[0009]

1 is a sectional view showing an embodiment of the present invention. As shown in the figure, a watertight jig 2 for sealing the end of the pipe 1
Has a seal plug 3, a blind flange 5 attached to a flange 4 fixed to the end of the pipe 1, a guide portion 6, a plurality of holding plates 7 and a plurality of bolts 8. The seal plug 3 is made of, for example, synthetic rubber, and is formed in a trapezoidal cross section having a tapered taper surface 3a on the outer side as shown in the perspective view of FIG. A cable holding hole 9 having an inner diameter corresponding to the outer diameter of a cable or the like connected between a working device such as an in-pipe working robot running in the pipe 1 and an external power supply device or control device. Are provided so as to penetrate the same number as the number of connection cables. Further, a step portion 3 for positioning is provided on one surface of the seal plug 3 which is perpendicular to the taper surface 3a.
b is provided.

As shown in the plan view of FIG. 3, the blind flange 5 has a U-shaped opening 10 in a part thereof, and both sides of the opening 10 have a taper on the outer surface of the seal plug 3. A guide portion 6 having a tapered taper surface 6a that fits with the paper surface 3a on its inner surface is welded. The height of the guide portion 6 is smaller than the height of the seal plug 3, and a plurality of screw holes 12 for attaching the bolts 8 are provided on the left and right upper surfaces 6b parallel to the blind flange 5. Mounting holes 12 a are also provided on both sides of the tip of the opening 10 of the blind flange 5. The holding plate 7 is formed in a strip shape, and mounting holes are provided at both ends.

With the watertight jig 2 configured as described above, as shown in FIG. 4, a power supply device 14 installed on the ground is installed in the pipe working robot 13 carried in the pipe 1 buried in the ground. When the work is interrupted, for example, when the work of one day is completed by running electric power from the vehicle and running in the pipe 1 under the control of the control device 15 on the ground to perform inspection or repair. The end of the pipe 1 is sealed in order to prevent rainwater and the like from entering from the end.

When the end portion of the pipe 1 is thus sealed,
First, the seal plug 3 is divided into two, and the pipe 1 is inserted into each cable holding hole 9.
Cables and pipes (hereinafter referred to as cables) that connect between the inside work robot 13 and the power supply device 14 on the ground
Insert 16 in. The seal plug 3 in which the cable 16 is sandwiched is inserted into the guide portion 6 from the opening end of the opening portion 10 of the blind flange 5 as shown in the side sectional view of FIG. Next,
The step portion 3a of the seal plug 3 is pressed by the pressing plate 7a and the bolt 8a to position the seal plug 3 with respect to the guide portion 6. Thereafter, as shown in the plan view of FIG. 6, a plurality of pressing plates 7 are placed on the upper surface of the seal plug 3 and tightened with bolts 8. By this tightening, the taper surfaces 3a on both side surfaces of the seal plug 3 are pushed into the taper surface 6a on the inner surface of the guide portion 6, and the taper surface 6a of the guide portion 6 removes the seal plug 3 from the outside. Press the sides. This pressing force seals between the guide portion 6 and the seal plug 3 and between the cable 16 and the seal plug 3. In this state, as shown in the sectional view of FIG. 1, the blind flange 5 is attached to the flange 4 at the end of the pipe 1 through the packing 17 to seal the inside of the pipe 1.

In the above embodiment, the blind flange 5 is attached to the flange 4 at the end of the pipe 1 after the seal plug 3 is attached to the blind flange 5, but the blind flange 5 is attached to the pipe 1. The cable 16 may be sealed with the seal plug 3 after being attached to the flange 4 at the end.

As described above, this invention inserts the cable into the cable holding hole of the seal plug which is divided into two,
After inserting this seal plug into the guide part from the U-shaped opening of the blind flange, push the seal plug inserted in the guide part into the guide part with the retainer plate, and seal it with the taper surface of the guide part. Since the outer surface of the seal stopper is pressed, it is possible to completely seal between the guide portion and the seal stopper and between the cable and the seal stopper. Therefore, it is possible to easily seal the end of the underground pipe with the work device inside the underground pipe connected to the cable connected to the external power supply device. The preparation time at the start can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a seal plug of the above embodiment.

FIG. 3 is a plan view showing a blind flange of the above embodiment.

FIG. 4 is a cross-sectional view showing a working state of a buried pipe to be sealed according to the above embodiment.

FIG. 5 is a side sectional view showing a state in which a seal plug is attached.

FIG. 6 is a plan view showing a state in which a seal plug is attached.

[Explanation of symbols]

 1 Pipe 2 Watertight Jig 3 Seal Plug 4 Flange 5 Blind Flange 6 Guide 7 Presser Plate 9 Cable Presser Hole

Claims (1)

(57) [Scope of utility model registration request] 1. An outer surface made of an elastic member is formed of a tapered taper surface, and has one or more penetrating cable holding holes, and the cable holding hole is divided into two parts. A seal plug, a guide portion provided on both sides of the U-shaped opening of the blind flange, and having a tapered taper surface on the inner surface for fitting with the outer surface of the seal plug, and the guide portion. A watertight jig for a pipe, further comprising: a holding plate for pressing and fixing a seal plug.