JPH0360366B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a pipe length measuring device for a gas supply lamp tube.

Conventional technology and its problems Recently, technologies are being developed that use the gas supply light pipe as a work opening to shut off the gas main pipe in an emergency, or to pump out accumulated water from within the gas main pipe. The length of gas supply light pipes varies widely depending on each customer, making it extremely inconvenient to work with.Therefore, there is a desire for the development of a device that can easily measure the pipe length in advance. There is.

The present invention has been made in view of these demands.

Means for Solving the Problems The present invention provides a flexible wire that is inserted from a working opening formed at one end of the gas supply lamp tube toward the gas main pipe connected to the other end. A guide ball disposed at at least one location in the middle part and a tip guide made of a coil spring that sequentially connects the guide balls. An electric contact is provided that makes sliding contact with the tube, and the electric contact and the supply light bulb are individually electrically connected to respective poles of an electric display device installed on the ground via lead wires. This relates to a pipe length measuring device for gas supply lamp tubes.

Embodiment An embodiment of the present invention will be described below based on the accompanying drawings.

FIG. 1 schematically shows the entire apparatus of the present invention,
1 is a flexible wire that is inserted from the work port a ₁ formed at one end of the gas supply lamp tube a toward the gas main connected to the other end, and 2 is a tip guide provided at the tip of the wire 1. , 3 is a wire threading machine applied to insert the flexible wire 1 into a pipe, 4 is an electrical contact buried in one guide ball 21 of the tip guide 2, 5 is an electrical display device installed on the ground, and 6 is an electrical cover device A lead wire 7 electrically connects one pole 51 of the device 5 to the electrical contact 4, and a lead wire 7 electrically connects the other pole 52 of the device 5 to the gas supply lamp tube a.

Details of the line passing machine 3 are shown in FIGS. 2 and 3. As such a wire passing machine 3, various types of well-known types used for cleaning various types of piping can be used. The wire passing machine 3 is a manual type shown in FIG. 2 and an automatic type shown in FIG.
By applying rotation to the flexible wire 3, it is possible to apply rotation in a direction around the central axis to the flexible wire 1 housed in a wound state within the rotating container 33. In order to store and feed out the wire 1, the automatic type shown in FIG. 3 is provided with a feed roll 35 that is actively rotated by a motor 34. As the flexible wire 1 provided in the wire passing machine 3, a so-called snake wire composed of one or more layers of coil springs may be used, for example.

As shown in detail in FIG.
is equipped with guide balls 21 and 22 arranged at both ends and a guide ball 23 arranged at at least one place in the middle, and the outer diameter of these guides 21 to 23 is equal to the inner diameter of the gas supply lamp outer tube a. Slightly smaller than , usually 1-3mm
(diameter) is used. In particular, the guide ball 22 connected to the wire 1 may be smaller by about 1 to 3 mm. This guide ball 21~
23 are sequentially connected by coil springs 24 and 25. The guide balls 21 to 23 are made of iron, for example.

FIG. 5 shows the state of the tip guide 2 passing through the bent portion b of the supply lamp tube a. Among the guide balls 21 to 23 of the tip guide 2, the most advanced guide ball 21 moves through the bend b while easily overcoming the unevenness in the bend b due to its spherical surface.
Therefore, the coil springs 24 and 25 following this
moves through the bending part b while being guided by the guide ball 21 while bending along the bending part b, and at this time the intermediate and proximal guide balls 23 and 22 center the coil springs 24 and 25. .

For example, if the intermediate guide ball 23 is omitted, the coil spring 241 between the guide balls 21 and 22 will meander within the bend b as shown in FIG. 6, which not only increases the resistance inside the pipe but also reduces the pushing force. I will do it.

Furthermore, if the guide ball 22 at the proximal end is omitted, the guide balls 21 and 23 are too close together as shown in FIG.
The flexible wire 1 is bent and gets stuck in the bent portion b, and the pushing force is not sufficiently transmitted to the distal end.

In the present invention, since the tip guide 2 is provided with guide balls 21 to 23 at both ends and the intermediate portion, the fifth
As shown in the figure, the coil springs 24 and 25 are smoothly bent and centered along the bending portion b, and the pushing force from the flexible wire 1 can be efficiently transmitted to the leading guide ball 21. As for the length of the tip guide 2, as shown in FIG. This is most advantageous in obtaining smooth bending and centering properties, but there is no particular problem with the length.

When passing through the bent portion b of the distal end guide 2, it is necessary to rotate the flexible wire 1 in a direction around the axis and cause the leading end guide ball 21 to perform a swinging motion.

In the present invention, in order to efficiently transmit the rotational force of the wire 1 to the most advanced guide ball 21,
It is advantageous to use coil springs 24 and 25 of slightly weaker spring strength than wire 1. Normally, the coil springs 24 and 25 are of the order of 0.8 to 0.4, assuming the springiness of the wire 1 to be "1", and are preferably arranged so that the springiness gradually decreases toward the tip.

The tip guide 2 is operated by coil springs 24 and 25 that connect the guide balls 21 to 23 and the like.
Overall, it exhibits an extremely excellent guiding function, and can sufficiently achieve the purpose of wiring even for a gas supply light tube a that has a diameter of 20 to 60 mm and has 5 to 10 bends in the middle. can.

As shown in FIG. 4, a guide ball 27 can be provided at the tip of the tip guide 2 via a coil spring 26 whose springiness is even weaker than the coil springs 24 and 25. The guide ball 27 is made of lead, for example, and serves to constantly guide the tip guide 2 downward.

As shown in the detailed view of FIG. 4, an electrical contact 4 made of a good electrical conductor such as copper is formed in a ring shape on the tip guide ball 21 of the tip guide 2 via an electrical insulating layer 41. When the tip guide 2 is inside the tube a, it is always in contact with the tube a. As is clear from FIGS. 1 and 4, this electrical contact 4 is connected via a lead wire 6 via a slip ring 8, which is drawn out from a wire threading machine 3 through the tip guide 2 and the flexible wire 1. It is electrically connected to one pole 51 of the electrical display device 5 installed on the ground. Note that the other pole 5 of the electrical display device 5
2 is an electrical cable embedded in the intermediate guide ball 23 of the tip guide 2, as shown in FIG. 8, instead of being directly connected to the bulb a through the lead wire 7 as shown in FIG. It may be configured to be connected to the lamp tube a via the target 42. In this case, the wire passing machine 3 is provided with another slip ring (not shown) as a relay point for the lead wire 7.

When measuring the length of the gas supply lamp tube a using the device of the present invention, as shown in FIG. Form a ₁ .

Next, as shown in FIG. 10, the wire passing machine 3 is operated to insert the flexible wire 1 into the outer tube a under the guidance of the tip guide 2. The togai tube a has a diameter of 20 to 60 mmφ and often includes many (usually about 5 to 10) bends b in the middle, but due to the excellent guiding effect of the tip guide 2 as described earlier, this The flexible wire 1 can be inserted into such a light tube a without any trouble.

During this insertion operation into the bulb a, the electrical contact 4 provided on the guide ball 21 of the tip guide 2 is constantly in contact with the bulb a, which functions as an electrical contact on the other side. , the electrical circuit of the electrical display device 5 including the leads 6, 7 is closed, and therefore the display section, e.g. the lamp 53, provided on the device 5 is lit.

The flexible wire 1 continues to be inserted into the tube a, and as a result, the guide ball 21 of the tip guide 2 enters the gas main pipe c connected to the outer tube a from the other end, as shown in FIG. At the same time, the electrical contacts 4 on the guide bulb 21 are disconnected from the lamp bulb a, so that the electrical circuit of the device 5 is opened and the lamp 53 is extinguished.
The insertion length of the wire 1 at the time of extinguishing the light is substantially equal to the installation length of the outer light tube a, so by reading the scale displayed on the wire 1, for example, the length of the outer light tube a can be determined. Can be measured.

During such a measurement operation, gas will leak if the work port _a1 is left open, so a gas sealing means can be provided that does not interfere with the wire 1 insertion work.

After completing the measurement of the length of the lamp tube a, the wire 1 and the tip guide 2 are removed and the lamp tube a is reconnected to the gas tank to restore the current state.

Effects As described above, according to the device of the present invention, the length of the gas supply light pipe can be easily and accurately measured, and it can be used for various types of work on gas main pipes that use the light pipe as a work opening. It's convenient.

[Brief explanation of drawings]

FIG. 1 is an overall view schematically showing an embodiment of the present invention, FIGS. 2 and 3 are longitudinal sectional views showing a wire threading machine applied to inserting a flexible wire, and FIG. Enlarged sectional view, 5th to 7th
8 is an enlarged sectional view showing a modified example of the tip guide, and FIGS. 9 to 11 are longitudinal sectional views showing the measurement situation by the apparatus of the present invention in the order of steps. In the figure, 1 is a flexible wire, 2 is a tip guide, 3 is a wire passing device, 4 is an electrical contact, 5 is an electrical display device, and 6 and 7 are lead wires.

Claims (1)

[Claims] 1 At the tip of a flexible wire that is inserted from a working opening formed at one end of the gas supply light tube toward the gas main connected to the other end, a flexible wire is placed at both ends and at least one point in the middle. a tip guide consisting of a guide ball and a coil spring connecting the guide balls in sequence; one guide ball of the tip guide is provided with an electrical contact that slides into the supply light tube during insertion into the tube; the electrical contacts and supply light bulbs separately to each pole of the ground-mounted electrical display;
A pipe length measuring device for a gas supply lamp tube, characterized in that it is electrically connected via a lead wire.