JPH0534190Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention can prevent air pollution from conduits that house cables attached to bridges, etc.
This invention relates to a conduit/cable connection device that seals the conduit without interfering with cable expansion/contraction and cable movement due to temperature changes, and prevents rust from forming on the inner surface of the conduit.

(Prior art) Conventionally, when cables are accommodated in a conduit attached to a bridge, both ends of the cable accommodation tube are left open and not sealed, causing air pollution and other phenomena to damage the conduit. Rust formed on the inner surface and caused corrosion.

(Problems to be solved by the invention) This invention solves the problem of rust prevention and
It is an object of the present invention to provide a conduit/cable connection device that prevents corrosion and also prevents cable movement due to temperature changes, vibrations, etc.

(Means for Solving the Problems) The present invention has a cable telescopic sleeve that is attached to a conduit, has an outer diameter slightly larger than the outer diameter of the conduit, and has a telescoping function, and the gap between the conduit and A conduit that is sealed with a moisture-proof mixture and a sealing tape, tightened and fixed with a cable tie from the outer periphery of the cable telescoping sleeve, and a pull-up pipe cap with a cable passed through it is glued to the tip of the cable telescoping sleeve with adhesive. It is a cable connection device.

In addition, a metal fitting for preventing cable movement through which the cable passes is provided inside the pull-up pipe cap,
The inner surface gap of the pull-up pipe cap is sealed with a moisture-proofing compound, and a tape is wound around the surface of the tip of the pull-up pipe cap.

(Example) Fig. 1 is a sectional view of an embodiment of the present invention in which the cable telescopic sleeve of the present invention is used in a conduit containing a cable, in which 1 is a cable, 2 is a conduit (steel pipe), 3 is an elastic rubber sleeve of the present invention (an enlarged cross section is shown in Fig. 2), 4 is a cap for a pull-up pipe, 5 is a hardware for preventing cable movement, 6 is a moisture-proofing mixture, 7 is a sealing tape, and 8 is a rubber material. 9 indicates the adhesive, 9 indicates the cable tie, and 10 indicates the protective PVC tape.

Insert the conduit 2 into the elastic rubber sleeve 3 of the present invention, which has an outer diameter slightly larger than the outer diameter of the conduit 2,
Gap between pipe line 2 and elastic rubber sleeve 3 (approximately 5 mm)
is sealed with a moisture-proofing mixture 6 and a sealing tape 7. FIG. 2 is an enlarged sectional view of the elastic rubber sleeve 3 shown in FIG. 1, which has a bellows-like pleat structure in the center of the elastic rubber sleeve so that the cable can move in both the longitudinal and lateral directions.

A pull-up pipe cap 4 and a cable movement prevention hardware 5 are inserted into the tip of the elastic rubber sleeve 3.
The gap between the two is sealed with a moisture-proofing mixture 6, and the cable tie 9 is tightened and fixed.

Then, connect the cable 1 to the metal fitting 5 for preventing cable movement.
After completing the installation, the elastic rubber sleeve 3 and the pull-up pipe cap 4 are bonded and fixed using a rubber adhesive 8.

In addition, in order to protect the pull-up pipe cap 4, wrap it over with a protective PVC tape 10 3 to 4 times and tighten it with a cable tie.

By doing this, when the cable moves due to temperature changes or vibrations, the elastic rubber sleeve 3
expands and contracts, and when the elastic force exceeds the elastic absorption range of the elastic rubber sleeve 3, the elastic force is transmitted to the cable movement prevention hardware 5.

The elastic rubber sleeve 3 was subjected to an expansion/contraction experiment 400,000 times, and the results were good.

(Effects of the invention) As explained above, the conduit/cable connection device of the present invention is effective in preventing rust in the conduit that houses the cable, and can extend the life of the conduit. At the same time, movement can be prevented by creeping. Therefore, it is highly effective when used in bridge sections constructed in coastal areas.

[Brief explanation of the drawing]

Figure 1 shows the conduit/cable connection device of the present invention.
FIG. 2 is an enlarged sectional view of the elastic rubber sleeve of the present invention shown in FIG. 1; FIG. DESCRIPTION OF SYMBOLS 1... Cable, 2... Conduit, 3... Elastic rubber sleeve, 4... Cap for pull-up pipe, 5... Hardware for preventing cable movement, 6... Moisture-proofing mixture, 7
... Sealing tape, 8 ... Rubber adhesive, 9
...Cable tie, 10...Protective PVC tape.

Claims (1)

[Scope of utility model registration request] The gap between the cable expansion sleeve, which is attached to the conduit and has an outer diameter slightly larger than the outer diameter of the conduit and has an elastic function, is sealed with a moisture-proof mixture and a sealing tape, and the cable A conduit/cable connection device in which a cable tie is tightened and fixed from the outer circumference of a telescoping sleeve, and a pull-up pipe cap with a cable passed through it is glued to the tip of the cable telescoping sleeve, and the cable is attached inside the pull-up pipe cap. The invention is characterized in that a metal fitting for preventing cable movement is provided through which the cable penetrates, the internal gap of the lift pipe cap is sealed with a moisture-proofing compound, and a tape is wound around the surface of the tip of the lift pipe cap. Conduit/cable connection equipment.