JPH056078B2 - - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for detecting and extracting accumulated water in gas pipes.

Background technology When water accumulates in a gas main, branch, or supply pipe (service pipe branched from the main or branch to each customer) due to excessive differential water or other causes, resulting in a gas supply failure. It is necessary to promptly detect the position of the accumulated water and pump out the accumulated water to ensure a stable supply of gas.

According to the conventional method for this treatment, if a gas supply failure occurs in a supply pipe, which is presumed to be caused by excessive accumulation of water in the main pipe or a branch pipe, the gas supply pipe adjacent to the supply pipe with the supply failure is The outlet of the supply pipe on the downstream side (the surface where the supply pipe branches from the main pipe or branch pipe) is excavated, a hole is drilled in the outlet, and the location of accumulated water is visually inspected to extract water. Additionally, when water accumulated in a supply pipe, an excavation survey was performed and the area where the water accumulated was cut out and repaired. In this traditional method,
If the area is on a public road, it is necessary to apply for permission to excavate from the road management agency, which requires a long time to perform the excavation work, and furthermore requires a lot of labor and expense for the burying and restoration work. Further, there were problems such as the use of a large number of equipment for excavating holes, and the noise caused by the work and the traffic regulations that adversely affected a wide area.

Problems to be Solved by the Invention The present invention solves the above problems and makes it possible to detect accumulated water in almost the same state without excavating the ground, and to pump out the accumulated water in a gas pipe. The purpose is to provide a detection and extraction method.

Means for Solving the Problems In order to achieve the above object, the present invention has a structure in which a liquid detector is attached near the tip of a wire passing tool made of a flexible elongated body, and one end is attached near the detector. An open flexible water conduit pipe led to the proximal end of the line fitting is inserted through the pipe, and while being rotated, the pipe is rotated until it reaches the estimated reservoir area in the gas pipe to detect the accumulated water in this area. The purpose is to pump out the accumulated water by operating a pump connected to the other end of the water conduit.

Function When the liquid detector detects liquid, a water conduit that opens near the detector pumps out the accumulated water by operating a pump.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings.

In FIGS. 1 and 2, gas is supplied from a main pipe or a branch pipe (hereinafter referred to as main pipe) 1 into which a supply pipe 2 branches, an inner pipe 22, a meter standpipe 3, a cock 23, and pipes shown by imaginary lines. Meter stand 2 after 24
5 and the gas from the meter 25 is directed to the gas consumer.

When detecting and extracting accumulated water according to the present invention, the pipe 24 between the pot 23 and the union joint 26 of the gas meter 25 is removed. For example, if it is estimated that an excessive amount of water has accumulated in the sloping valley 1a of the main pipe 1, first remove the pipe 24 and install a water seal (not shown) in its place. The wire passing tool 10 is gradually inserted through the wire while being rotated by a commercially available rotating means 11 connected to its end.

As shown in FIGS. 2 and 3, the wire passing tool 10 has a spherical steel guide member 1 attached to the tip of a coil spring tube 13 that is a flexible elongated body.
2 is fixed to the guide member, and a liquid detector 14 is attached slightly in front of the guide member (on the proximal end side). A water conduit 15 with one end open is provided near where the liquid detector 14 is attached (further to the front in the embodiment). The water conduit 15 is flexible, such as a vinyl chloride pipe, and the other end is guided to the base end of the line fitting 10 and connected to the liquid recovery tank 5 after detecting the liquid. I can do it. The liquid detector 14 has a pair of electrodes, and a lead wire 16 connecting the electrodes and the main body 11 is inserted through the water conduit 15 .

As shown in the second figure, the coil spring cylinder 13 is made of piano wire or the like, and has a guide member 1 at the tip.
The first wire diameter and coil diameter gradually increase from the second side.
Coil part 13a, second coil part 13b and third
This is a coil portion 13c. All of these coils are wound in the same direction, and each coil portion is made continuous by means such as welding. The first coil portion 13a has a length of, for example, 7 cm.
One end is fixed to the guiding member 12 by screwing or the like, and has a small wire diameter and winding diameter, and has not only bending rigidity to the extent that it bends due to the weight of the guiding member but also low torsional rigidity. have Second coil part 13
b has a length of approximately 15 to 20 cm, and has a larger wire diameter, winding diameter, bending rigidity, and torsional rigidity than the first coil portion 13a. Further, the third coil portion 13c has a larger wire diameter, winding diameter, bending rigidity, and torsional rigidity than the second coil portion 13b, and occupies most of the total length of the spring coil tube 13.

A plurality of spiral grooves (three grooves in this embodiment) are formed in the hemispherical portion of the leading end of the guiding member 12 from the center thereof along the winding direction of the spring coil.

Here, the spring is wound in the direction of tightening when the wire threading tool 10 rotates, and the groove 1 of the guide member
2a is also twisted in the same direction as the rotational direction of the wire threading tool 10.

When inserting the wire, the wire threading tool 10 is rotated in the direction in which the coil is tightened (clockwise), and the tip of the wire passing through the water seal pipe, the stand pipe 3, and the supply pipe 2, to the inclined valley 1a where water accumulation is expected to occur. Let the department enter. When the liquid detector 14 reaches the accumulated water, the pair of electrodes becomes conductive, and a signal is sent to an amplifier (not shown) to cause the accumulation of water by transmitting light (red lamp 11a) and sound (buzzer 11b). You can check the water position. If the signal is sent, the rotation of the line fitting 10 is stopped, the other end of the water conduit 15 is connected to the inlet side of the vacuum water extraction pump 4, and the pump 4 is started to pump out the accumulated water and recover the liquid. Collect into tank 5.

When the wire threading tool 10 is inserted into the pipe, the wire threading tool is rotated in the tightening direction along the coil winding direction, so that the guide member 12 collides with the inner wall of the pipe and is prevented from advancing and rotating. Then, it stores stress against twisting, and when that stress exceeds a certain value, it vibrates as a reaction, shakes off the rotation prevention, and directs it in a direction where it can move forward.
In particular, when the guide member 12 is caught on the inner corner 21a of the pipe 21 as shown in the fourth figure, the inner corner 21a fits into the groove 12a of the guide member due to the twisting of the wire threading tool, causing the guide member 12 to rotate. This facilitates separation from the inner corner portion 21a. When pulling out the wire threading tool 10 from the gas pipe, it may be rotated in the opposite direction, or it may be pulled as it is.

Effects As described above, the present invention enables detection of accumulated water, extraction of water, and confirmation of the position of accumulated water from the ground by mechanical and electrical operations, so not only excavation work but also drilling, burying, and other repair work are not required. do not need. Furthermore, there is no need to negotiate with road management agencies, leading to significant savings in work time, labor and materials. Furthermore, there is no noise generated during excavation, and since the gas is sealed with a water seal during work, it does not leak into the atmosphere. Moreover, the cost was significantly reduced compared to the conventional drilling and extraction method.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of a construction mode showing one embodiment of the present invention, Fig. 2 is a side view of the main parts of the wiring tool, Fig. 3 is a front view of the guiding member, and Fig. 4 is the main part of the gas piping. FIG. 1... Main pipe, 2... Supply pipe, 3... Meter standpipe, 4... Vacuum water extraction pump, 10... Wiring tool,
11...Rotating means, 12...Guiding member, 13...
Coil spring tube, 14...Liquid detector, 15
... Water pipe, 16 ... Lead wire.

Claims (1)

[Scope of Claims] 1. A liquid detector is attached near the tip of a wire threading tool made of a flexible elongated body, and a flexible water conduit with one end open near the detection area is attached to the base of the wire threading tool. The water pipe that has been guided to the end is inserted through the pipe, and while being rotated, it reaches the estimated water retention area in the gas pipe, detects the water accumulation in this area, and activates the pump connected to the other end of the water pipe. A method for detecting and extracting accumulated water in a pipe, which is characterized by pumping out accumulated water. 2. The wire threading tool has a guide member fixed to the tip of one side of a coil spring tube, and this coil spring tube has low bending rigidity and torsional rigidity at one end side where the guide member is attached, and both of these rigidities are low at the other end. A method for detecting and extracting water accumulated in a pipe according to claim 1, wherein the height is increased stepwise as the water reaches the side.