JPH0232396Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is mainly intended for connecting to main pipes that are buried underground like gas pipes, embedded in building walls, or installed in a moderate manner. For example, glycol liquid may be injected as a leakage prevention measure at the joints that make up the main pipe through branch pipes that are connected in a branched state and have an open end above ground, or for various pipe construction works such as sandblasting. Drain liquid that has entered the main pipe due to bending or damage,
A transmitter that generates sound waves, magnetic fields, etc. is placed inside the main pipe, and the pipe route is detected by receiving signals from exposed parts such as the ground, or during pipe work, the transmitter is placed in a bag inside the main pipe and expanded using a gas supply. This can be done by blocking the passage in the main pipe, by inserting a fiberscope or AC oscillator into the main pipe to observe the situation inside the main pipe or branch pipe, or by diagnosing the position of joints and the state of corrosion based on the state of eddy current generation in the pipe. Or, in cases where a heater, etc. is placed inside the pipe to heat and remove the membrane at the branch pipe connection port that was accidentally blocked during inner lining construction, the liquid injection pipe, discharge pipe, transmitter, bag, fiberscope, heater, etc. This invention relates to an intraductal wire passing tool used when inserting an insert into a pipe such as the above.

A conventionally known tool similar to the above-mentioned pipe wire passing tool is one in which a weight-shaped member having a round shape as a whole, such as a steel ball, is attached to the tip of a spiral wire rod. This is a drain cleaning tool that is used exclusively for removing deposits (rust and drain) in drain pipes, which generally have a smooth pipe configuration to prevent liquid and dirt from accumulating. There are steps and curvatures inside the pipe, like a pipe.
If the pipe is complex, with many threaded parts, a variety of joints such as mechanical joints, elbows, and valve joints, and many sharp bends,
If it hits a bend and cannot be moved through, or if it is guided upwards at a valve tee with an upward slope and cannot be moved into the main pipe, it is difficult to carry out the various operations described above. It was practically impossible to use this as a tool for inserting the pipe insert into the main pipe through the branch pipe, that is, as a wire threading tool.

Therefore, the means that have been generally adopted as means for inserting the above-mentioned intraductal insert into the main pipe are:
This is a method of exposing a local part of the main pipe by excavating the road surface or destroying an embedded wall, and then drilling or cutting the exposed main part to insert the pipe insert into the main pipe. This method requires extensive labor and time-consuming on-site work such as excavation, destruction, drilling, and cutting, which has the disadvantage of being inefficient and increasing construction costs, especially when excavation is involved. In the case of buried pipes, it is extremely difficult to implement this method in heavily paved areas or areas with heavy traffic.

In view of these circumstances, the present invention has been developed to ensure that the aforementioned various inserts enter the main pipe through the branch pipe without requiring construction work such as excavation or perforation, even if the branch pipe is complex as described above. The object of the present invention is to provide an in-pipe wire passing tool that can be used to pass wires through pipes.

The characteristic configuration of the pipe wire passing device according to the present invention devised to achieve the above object is that a spiral wire rod having a relatively strong elasticity and a short spiral wire rod having a lower elasticity than the wire rod is attached at the tip of the spiral wire rod having a relatively strong elasticity. The function and effect of the present invention having such a characteristic configuration are as follows.

In other words, since it has the above-mentioned components,
Even if there are many complicated bends, steps, turns, threads, etc. in the middle of the branch pipe, the roundness of the guide member and the bending deformation of the helical wire can smoothly enter the pipe, In addition, in the event of a hitch on the way, the helical wire moves through the branch pipe while being immediately released from the hitch due to twisting rotation of the helical wire, reverse rotation due to its restoration, and vibration. In addition, at valve stations where there is an upwardly sloping wall in front of the entrance direction, the guide member is guided downward by the weight of the guide member and the appropriate elasticity of the short spiral wire, and as it advances upward, the guide member is guided downward. There is no possibility that the above-mentioned intrusion is prevented, and it is possible to reliably enter the main pipe.

By the above-mentioned action, it is possible to hold a flexible pipe externally or internally in a spiral wire, or to attach a transmitter, bag, heater, etc. to the guiding member or its vicinity, and then open the exposed branch pipe. The pipe insert can be easily, quickly and reliably delivered into the main pipe by a simple method such as inserting it from the end, which does not involve excavation, destruction, perforation, cutting, or other construction work.

Therefore, in comparison with the previously described conventional means adopted as a means of entering the main pipe for an intraductal insertion, (a) the applicability of the place of implementation and the applicability of the target main pipe is extremely large.

(b) Work time can be significantly reduced.

(c) Construction costs can be significantly reduced.

This resulted in the same effect.

Hereinafter, an embodiment in which the present invention is applied to a method of injecting a glycol liquid for sealing a joint of a buried gas conduit will be described in detail.

Reference numeral 6 denotes the main body of the wiring tool used in this implementation. First of all, to explain this, 3 is the inside of the above-ground vertical pipe 2B which has a socket 9 at the upper end of the branch pipe 2 connected to the gas pipe 1, especially 4 is a cone-shaped guide member having a round shape such as a sphere or an egg, and is large enough to be moved through the interior of the piano. It is a spiral wire rod that uses a wire, and when it is rotated, it accumulates stress against twisting within the branch pipe 2, and when the load falls below a certain level, it rotates and vibrates due to the reaction, and it is also suitable for reuse. It has a durable elastic strength. Reference numeral 5 denotes a spiral wire rod using a piano wire, which has softer elasticity than the wire rod 4 and has a length of about 10 cm (approximately the length of the elbow 2a in the branch pipe 2). The wire passing tool 6 is constructed by removably screwing the guiding member 3 and removably screwing one end of the spiral wire 3 to the other end via the oval connecting fitting 10. And this wiring tool 6
A flexible tube 7 made of soft resin is fitted and held on the outside of the wire 4, and a rubber-like substance is sandwiched between sponge-like substances near the tip of the flexible tube 7. An elastic shutoff tool 8 is attached that can shut off the branch pipe 2 by elastically coming into close contact with the inner circumferential surface of the branch pipe 2.

Next, a method for inserting the flexible tube 7 into the branch pipe 2 via the wire passing tool 6 and injecting the glycol liquid into the conduit 1 through the inserted flexible tube 7 will be listed in order of steps.

(1) Open the upper part 9 of the above-ground standpipe 2B, and connect the above-ground standpipe 2 to the above-ground standpipe 2 through the exposed opening end 5A opened by the above-ground standpipe 9 from the guide member 3 side of the wire passing tool 6.
Insert into B.

(2) Manually from the ground in the inserted state,
Alternatively, the wire threading tool 6 is pushed into the branch pipe 2 while mechanically applying rotation or vibration to the entire wire threading tool 6 via the spiral wire rod 4. Of the branch pipes 2, the underground service pipe 2C that connects to the above-ground standpipe 2B has a complicated bend due to the elbow 2a and a step or threaded portion due to the joint 2b.
Due to the screw rotation as described above, the restoring movement and vibration, the guide member 3 moves approximately in a circular motion,
Moreover, since the spiral wire rods 4 and 5 are deformed to follow the shape of the tube, they pass through and enter with almost no hitch, as clearly shown in FIG. At this time, since the branch pipe 2 is always blocked by the blocker 8,
Gas is prevented from leaking to the ground side.

(3) The lead-in pipe 2C and the conduit 1 are connected by a tee 2D, and the vicinity of the connecting part therein has an upward curve. Since the wire rod 5 is bent and deformed downward as clearly shown in FIG. 4, the wire rod 5 does not come to a dead end but moves downward and reaches the inside of the conduit 1. Then, when the blocking tool 8 enters the conduit 1 following the guiding member 3, gas flows into the branch pipe 2, so that it can be confirmed that the wire passing tool 6 has reached the inside of the conduit 1.

(4) Next, the wire passing tool 6 is pulled back and the blocking tool 8 is returned to the position of the chi 2D or the lead-in pipe 2C to block the branch pipe 2, and the tip 7a of the flexible pipe 7 is inserted into the conduit 1. Open it. At this time, near Kotuku 9,
If the outside of the connection between the standpipe 2B and the wire threading tool 6 is surrounded in advance with a bag-shaped cover 11 made of transparent vinyl with a bellows part to prevent gas blowout, it is possible to easily insert the wire threading tool 6 and pass the wire therethrough. It is possible to prevent gas from blowing out when confirming that the tip of the tool 6 has reached the inside of the conduit 1.

(5) Connect the above-ground side end of the flexible tube 7 to the liquid supply pump 12
By operating the pump 12 while connected to the glycol liquid tank 13 through the flexible tube 7, the glycol liquid is injected directly into the conduit 1.

(6) After the liquid injection is completed, reverse rotation is applied to the wire threading tool 6 to remove the force applied to the inner surface of the branch pipe 2, while pulling out the wire threading tool 6 and the flexible tube 7. After the extraction is completed,
The series of operations is completed by closing the pot 9.

In addition, when draining excess liquid etc. from inside the conduit 1,
It is only necessary to connect it to the pump 12 in reverse and operate it, and the other working steps are the same as in (1) to (6) above.

Furthermore, the target conduit 1 may be any type of hidden pipe or even an exposed pipe other than a buried gas pipe.

The wire rod 4 may have an inner and outer double structure in which the wire rod 4 is wound in opposite directions.

Figure 5 shows a conduit 1 in the same way as described above, with a transmitter 7A that generates sound waves, magnetic fields, etc. attached to the tip of the wire threading tool.
Another mode of use is shown in which the pipe route is detected by entering the pipe and receiving it from the ground using the receiver 14, such as inserting a bag for blocking the pipe, diagnosing the pipe, and removing the lining film at the branch pipe connection port by heating. This can also be carried out in substantially the same manner as described above.

Furthermore, in the above embodiment, the flexible tube 7 is held by fitting onto the spiral wire 4, but it may also be held by fitting inside the spiral wire 4. In that case, as shown in FIG. The tip 7a of the flexible tube 7 is positioned to extend into the connection fitting 10, and the tip 7a of the flexible tube 7 is
It is also possible to use a wiring fitting 6 in which a glycol liquid injection nozzle 10a is formed in a connecting fitting 10.

FIG. 7 shows another embodiment of the wire passing tool, in which two spiral wire rods 5, 5 are attached to the connecting fitting 10 with an intersection angle θ that allows them to pass through the branch pipe 2. The cone-shaped guide members 3, 3 are connected and supported through a double-headed wire threading tool 6, which is particularly useful when there is a large step on the inner surface of the branch pipe 2, such as in a mechanical joint. , when one guide member 3 is stuck, the rotation of the other guide member 3 and the accompanying reaction and vibration can release the catch and provide smooth entry into the pipe, making it even more effective. .

[Brief explanation of drawings]

Fig. 1 is an overall schematic vertical sectional view showing the embodiment;
The figure is an enlarged longitudinal sectional view of the main part, FIGS. 3 and 4 are enlarged longitudinal sectional views of the main part showing the state of wire connection, FIG. 5 is an overall schematic longitudinal sectional view showing another usage mode, and FIG. figure,
FIG. 7 is also an enlarged longitudinal cross-sectional view of the main parts in different embodiments. 3... Cone-shaped guiding member, 4, 5... Spiral wire rod.

Claims (1)

[Claims for Utility Model Registration] A cone-shaped guiding member 3 having a rounded shape as a whole is connected to the tip of a spiral wire 4 having relatively strong elasticity via a spiral wire 5 having a lower elasticity and shorter length than the wire 4. An in-pipe wiring fitting that is connected in series. The pipe wire passing tool according to claim 1, wherein each of the spiral wire rods 4 and 5 is made of piano wire.