JPH0792183B2 - Pipe wire fitting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an inner surface lining of a pipe, a pipe cleaning, a pipe exploration,
To measure the length of a pipe, a coil spring-like wire for feeding and withdrawing from the pipe in a rotating state is composed of a wire body and a wire tip portion connected to the wire body. Is formed in a coil spring shape with a pitch larger than the wire diameter and more easily bent than the wire body, and a guide for wire passage is attached to the wire tip, and the amount of compression bending is set at the wire tip. The present invention relates to a pipe wire fitting provided with a sensor for detecting whether or not a value has been reached.

[Conventional technology]

Conventionally, when pushing the wire through the pipe while rotating it, for example, a guide is inserted into the closed side of the T-shaped pipe that has blocked one side,
No means was provided to detect abnormal situations such as the guide being caught on the elbow. So, to detect this abnormal situation, in the tip of the coil spring wire,
It has been proposed to provide a contact or proximity sensor consisting of a pair of detection members that are fixed one behind the other in the lengthwise direction (see Japanese Utility Model Laid-Open No. 62-52399) (hereinafter, simply referred to as a known example). .).

[Problems to be Solved by the Invention]

However, if an abnormal situation such as that described above occurs, the coil spring-shaped wire is pushed while being rotated in a state where the guide cannot be pushed unless the sensor as described above is provided. There was a possibility that the wire tip and the guide would remain in the tube due to the fact that the wire tip was bent and twisted, and a rotational force was applied to the tip, causing the tip of the wire to be broken off. As a measure against this, even when the sensor of the above-mentioned known example is used, since the sensor is directly attached to the coil spring, the interval between the sensors cannot be increased, and both sensors are fixed by the sensors provided in proximity. Since it detects whether or not the amount of compressive deflection of the wire in the area between
If the spring constant of the wire is not low, it may be insensitive and there may be a delay in detecting the above-mentioned abnormal situation.If the interval between the sensors is reduced to increase the sensitivity, proximity detection is performed even if the coil spring is bent. There is a risk that it will end up. In addition, in order to increase the distance between the sensors, the spring constant of the wire in this part must be lowered, and if the spring constant of this sensor mounting part is too low, the local bending at this sensor mounting part will occur. Therefore, there is a risk that it may be mistaken for an abnormality.

An object of the present invention is to reliably detect an abnormal situation at the tip of the wire in advance and to reliably prevent the breakage of the tip of the wire as described above.

[Means for Solving the Problems]

A characteristic configuration of the present invention is that a first electrical contact of the sensor is fixed to a longitudinal intermediate portion of a wire tip portion, and a second electrical contact of the sensor, which is electrically contactable with the first electrical contact, A holding member that holds the wire main body and the wire tip portion apart from each other at a predetermined distance at a substantially central position of the coil diameter of the wire tip portion by internally fitting the holding member into the wire tip portion. An electric wire, which is formed so as to be able to bend with the bending deformation of the wire tip portion, and which transmits information from the first and second electrical contacts of the sensor, is derived from the proximal end side of the coil spring wire. The action and effect are as follows.

[Action]

In other words, by utilizing the fact that the wire tip portion is more flexible than the wire body and the compression deflection characteristics are suitable for detecting that the compression deflection amount has reached the set value, the guide attached to the wire tip portion is used. The amount of compression deflection between the continuous portion of the wire body that occurs when it is caught by a T-shaped tube or elbow, and the intermediate portion of the wire tip that secures one electrical contact The information from a suitable sensor was taken out of the tube from the proximal end side of the coil spring wire with an electric wire.

Therefore, if the detection means and the display means are connected to the electric wire, whether the guide is caught in the pipe can be easily and reliably judged from outside the pipe and accurately at an early point, and the feeding of the coil spring wire is stopped. As a result, it is possible to reliably prevent breakage of the wire.

This certainty is ensured as follows. That is,
The first electrical contact of the sensor is fixed to a longitudinal middle portion of the wire tip portion, and the second electrical contact is connected to the wire main body by a holding member formed so as to be able to bend in accordance with the bending deformation of the wire tip portion. The wire is held at a position separated from the continuous portion of the wire tip by a predetermined distance, and this holding member is formed so as to be able to bend together with the wire tip, so that the wire is not bent even at a sharp bend in the pipe. There is no information that the wire is held near the center of the coil diameter at the tip, and there is no proximity of both electrical contacts due to the wire tip bending along the bend of the pipe, and that the wire tip is misaligned due to compression. It can be prevented from being emitted from the sensor.

Further, since the holding member is formed so as to be able to bend with the bending deformation of the wire tip portion, it can be made to have an appropriate length as necessary, and thus, with respect to the distance between both electrical contacts. , The strain of the wire corresponding to the amount of compression deflection of the wire tip required for both contacts to come into contact or to be detected can be relatively low. Therefore, the compression spring constant of the wire tip is lower than that of the wire body. It is possible to increase the sensitivity of detection of the compression deflection without significantly reducing it.

〔The invention's effect〕

As a result, it is possible to increase the detection sensitivity of compression deflection without significantly reducing the compression spring constant at the tip of the wire compared to the wire body. Can be detected. Therefore, the reliability of abnormality detection is increased, and
It has become possible to provide a more safe pipe conduit for practical use.

〔Example〕

 Next, examples will be shown.

As shown in FIG. 1, a coil spring wire (3) has a spherical guide (1) for passing a wire, a lining finishing object (5) having a diameter larger than that of the spherical guide (1), and two lining objects. (6) are attached in this order in a state of being arranged from the distal end toward the proximal end side, and the tube (7) for injecting the liquid lining material is passed through the coil spring wire (3) to form the coil spring wire (3). )
The tube and the tube (7) are rotated and wound around a storage drum (4) which can be freely drawn and taken up, the lining material injection device (11) is connected to the tube (7), and the coil spring wire (3) is rotated. In this state, a pipe inner surface lining tool is formed for feeding and withdrawing the pipe in the state, and applying the lining material injected into the pipe with the tube (7) to the pipe inner surface with the withdrawal of the lining object (6).

Two lining objects (6) are fixed to a coil spring wire (3), and a spherical guide (1) attached to the coil spring wire (3) at a fixed position in the longitudinal direction and a lining object. A lining finishing object (5) is fitted onto the coil spring wire (3) slidably over (6).

That is, when the coil spring wire (3) is fed into the pipe, the lining finishing object (5) approaches the lining finishing object (6), as shown in FIG. ) And the spherical guide (1), the bending of the coil spring wire (3) allows the spherical guide (1) to easily pass through the bend of the tube. When the coil spring wire (3) is pulled out of the pipe, the lining finishing object (5) is moved to the spherical guide (1) as shown in FIG.
Of the spherical guide (1) coming into contact with the lining material applied to the pipe can be suppressed by the position regulation of the spherical guide (1) by the lining finishing object (5), and a good lining treatment can be performed. Is configured.

As shown in FIG. 3, the tip of the coil spring wire (3) is provided with a wire tip portion (3b) formed by a wire material thinner than the wire body (3a) so that the wire tip portion is easily bent. The wire rod is gradually thinned so that it is easier to bend toward the side, and the wire tip (3b) is formed in a coil spring shape with a pitch larger than the wire diameter. When pushing the coil spring wire (3) into the pipe, the wire The flexibility of the tip (3b) makes it easier for the spherical guide (1) to pass through the bent portion of the pipe, and when the spherical guide (1) is caught in the pipe, the wire tip (3b) will be bent due to compression. Configured to occur.

As a holding member for holding the second electrical contact (8b) in a portion of the wire tip portion (3b) located between the lining objects (6), a spherical body with a hole made of an electrically insulating material such as resin, rubber or wood. A large number of (2) are arranged close to each other and internally fitted to the wire tip (3b), and the first electric contact (8a) is attached to the fixing member (9) of one of the lining objects (6) in an electrically conductive state. , The second electrical contact (8b) is attached to the sphere (2) close to the lining object (6), and the fixing member (9) is attached.
And the action of the sphere (2), the first and second electrical contacts (8a),
(8b) is configured to be held at a substantially central position of the coil diameter of the wire tip (3b) even when the wire tip (3b) is bent.

That is, when pushing the coil spring wire (3) into the tube, if the spherical guide (1) is caught by the tube and cannot move, the wire tip portion (3b) is bent due to compression to cause the first and second wires. Both electric contacts (8a), (8b) are arranged relative to each other so that the electric contacts (8a), (8b) contact each other.

Also, when the wire tip (3b) bends, the outer side and the inner side of the wire tip (3b) expand and contract, and the first and second positions are arranged substantially at the center of the coil diameter of the wire tip (3b). The electrical contacts (8a) and (8b) are configured so as not to come into contact with each other.

Connect the electric wire (10) to the wire body (3a) that is in electrical communication with the first electrical contact (8a) by the fixing member (9) and the wire tip (3b), with the wire main body (3a) pulled out from the proximal end side. I am doing it. Further, the electric wire (10) with an insulation coating is connected to the second electric contact (8b), passed through the inside of the coil spring wire (3), and led out from the proximal end side of the coil spring wire (3). . And both wires (1
0) is connected to the rotary electric contact (12), and whether the first and second electric contacts (8a) and (8b) are contacted by the detector (13) connected to the rotary electric contact (12) ,
That is, it is configured so that it can be determined whether or not the spherical guide (1) is caught in the tube.

[Another embodiment]

 Next, another embodiment will be described.

The guide (1) may be integrally rotated with the coil spring wire (3) at all times or only when it is pushed, and may be appropriately changed in shape and structure.

The means for feeding and withdrawing the coil spring wire (3) from the tube in a rotating state can be changed appropriately,
For example, the coil spring-shaped wire (3) is rotated in the forward or reverse direction or in one direction by the rotation of the storage drum (4) or chuck, and the coil spring-shaped wire (3) is rotated by the female screw, the roller, or the caterpillar. It may be fed in and pulled out by driving.

Means for making the wire tip portion (3b) more flexible than the wire body (3a) is, for example, both (3a) and (3b).
The material can be changed appropriately, or the wire tip portion (3b) can be formed uniformly over the entire length, etc.

The means to detect the amount of compression deflection of the wire tip (3b) is
For example, a proximity switch that can measure distance, a proximity switch that is turned on only when the distance to the measurement target is less than or equal to the setting, a range finder that measures the distance with laser or ultrasonic waves, and other appropriate changes, and those sensors (8a) , (8b).

The mounting positions of the sensors (8a) and (8b) can be changed appropriately in the longitudinal direction of the wire tip portion (3b), for example, between the spherical guide (1) and the lining object (6) and between the spherical bodies (2). You may arrange in between.

A means for holding the sensors (8a) and (8b) at a substantially central position of the coil diameter of the wire tip (3b) even when the wire tip (3b) is bent is, for example, a rubber tube or a rod-shaped elastic body with a hole. These can be appropriately changed, and they are collectively referred to as sensor holding means (2) and (9).

Electric wires (1 that transmit information from the sensors (8a) and (8b)
The detector (13) connected to (0) is the sensor (8a), (8
It can be appropriately selected according to the type of b) and may be connected on site.

Various kinds of lining objects, in-pipe cleaning tools, in-pipe probers, etc. can be attached to the coil spring wire (3), and nothing needs to be attached in the case of pipe length measurement.

INDUSTRIAL APPLICABILITY The pipe wire connector of the present invention can be applied to city gas, natural gas, water supply, various other buried pipes, exposed pipes, and the like.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is an overall conceptual view of a wiring tool, and FIGS. 2 (a) and 2 (b) are explanatory views of the action of a lining finishing object. The figure is a detailed view of the main parts. (1) …… Guide, (2) …… Holding member, (3) …… Coil spring wire, (3a) …… Wire body,
(3b) …… Wire tip, (8a), (8b) …… Sensor, (10) …… Wire.

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Fumio Tsukimoto 5-1, Hirano-cho, Higashi-ku, Osaka City, Osaka Prefecture Osaka Osaka Gas Co., Ltd. Inside the rubber factory (72) Inventor Tetsuo Rokura 4-5, Minamihorie, Nishi-ku, Osaka City, Osaka Prefecture Tokawa Rubber Co., Ltd. (56) References: 62-52399 (JP, U) 62-52400 (JP, U)

Claims (1)

[Claims] 1. A coil spring-shaped wire (3) for feeding and withdrawing from a pipe in a rotating state, a wire body (3a), and a wire tip portion (3b) connected to the wire body (3a). Consists of its wire tip (3b)
Is formed in a coil spring shape having a pitch larger than the wire diameter and being more flexible than the wire body (3a), and a wire guide (1) is attached to the wire tip (3b) to form the wire. A pipe conduit having a sensor (8a), (8b) for detecting whether or not a compression deflection amount reaches a set value at a tip portion (3b), the longitudinal direction of the wire tip portion (3b). The second electrical contact (8a) of the sensor is fixed to the middle portion, and the second electrical contact of the sensor is electrically contactable with the first electrical contact (8a).
The electrical contact (8b) is held at a predetermined distance from the continuous portion of the wire body (3a) and the wire tip portion (3b) at a substantially central position of the coil diameter of the wire tip portion (3b). Hold the holding member (2) with the wire tip (3b).
And the holding member (2) is formed so as to be able to bend along with the bending deformation of the wire tip portion (3b), and the first and second electrical contacts (8a), ( 8b) An electric wire (10) for transmitting information from 8b) is led out from the proximal end side of the coil spring wire (3).