JPH0990U - Sealing plug for cable core and gas stopping method using the same - Google Patents

Abstract

(57) [Abstract] [Purpose] To stop the discharge of gas flowing out from the cable at the time of this cable core work in the communication cable being maintained by filling it with gas such as compressed air. Due to
We will reduce the number of operations during this work and improve the reliability of the equipment. [Structure] On a cable core wire 3 of a communication cable 1, a sealing plug 4 made of a liquid mixture or the like which solidifies after a certain time,
The cable jacket 2 is wrapped with a gas stopping tape 5 to stop the release of gas. Since the liquid mixture enters the small gaps in the cable core, gas can be stopped.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a communication cable (hereinafter, referred to as a gas filling cable) which is filled with gas to prevent a failure due to flooding.

[0002]

[Prior art]

 Conventionally, it was not possible to stop the discharge of gas flowing out from the portion where the cable core wire was exposed while the gas pressure was still applied inside the gas-filled cable.

[0003]

[Problems to be solved by the device]

 For this reason, when the cable core wire construction was carried out with the existing gas-filled cable, the gas was being blown off. In this state, it may not be possible to secure the internal pressure of the cable only to prevent water infiltration at other points, so it was necessary to install cylinders at the adjacent connection points on both ends of the work site and fill them with gas. Since this gas filling continues from the beginning of the work to the end of the work, it was necessary to use a large high-pressure cylinder and check the remaining amount during the work. Therefore, not only was the gas to be filled wasted, but much effort was also expended. Moreover, even if the gas was filled at the adjacent connection point of the work place, the gas pressure could not be secured near the work place to prevent water infiltration in the vicinity of the work place, so there was a risk of failure due to water infiltration. Since the gas partition wall created to stop the gas at the end of the gas filling cable also needs to be created without gas pressure inside the cable, it is not possible to make it with the existing gas filling cable. It was almost impossible. The problem to be solved by the invention is to solve these problems by simply stopping the release of the gas flowing out from the exposed portion of the cable core wire while the gas pressure is being applied inside the gas-filled cable. It is to be.

[0004]

Means for Solving the Problems The inventor of the present invention thought that the flow of the gas could be stopped if the gap formed between the cable cores could be closed, and repeated the trial. As a result, it was found that the liquid mixture that hardens after a certain period of time closed the gap between the cable cores. Then, the present invention could be completed by producing a sealing plug in which the mixture and the cable core wire are integrated. The construction method according to the present invention is as follows. A sealing plug 4 is formed on the cable core wire 3 from a liquid mixture that hardens after a lapse of a fixed time. The gas flow can be stopped by fixing it with a gas stopping tape 5 or the like so that the sealing plug 4 and the cable jacket 2 are integrated. The method for forming the sealing plug and the gas stopping method may be as in each of the examples introduced later, but it goes without saying that there are various other methods that can be adopted.

[0005]

[Action]

 By fixing the sealing plug 4 attached to the cable core wire 3 and the cable jacket 2 with the gas stopping tape 5 or the gas stopping fixture 6, the gas easily flowing out from the inside of the cable. Can stop the emission of. After the work is completed, the gas flow can be secured by removing the gas stopper rubber tape 4 and the like, so that maintenance of the gas filling cable will not be hindered. That is, the sealing plug can be removed, but it can be left.

[0006]

【Example】

 First Embodiment FIG. 1 is a perspective view showing a first embodiment with a partial cross section. 2 is a cross-sectional view and FIG. 3 is a side view. In the first embodiment, the sealing plug 4 attached to the cable core wire 3 and the cable jacket 2 are fixed by a tape 5 for gas stop so as to be wound.

Second Embodiment FIG. 4 is a perspective view showing a second embodiment. In the second embodiment, the gas stopper fixing tool 6 in which the sealing plug 4 and the cable jacket 2 attached to the cable core wire 3 are made of rubber, and the rubber or the like is attached to the metal or the like as the buffer sealing material 7 is used. Are integrated in.

Third Embodiment FIG. 5 is a side view showing a third embodiment. Example 3 is an example of producing the sealing plug 4. In this embodiment, the cable core wire 3 is sandwiched between the mixture receivers 9 which are folded in two, and the both ends are pressed down to prevent the mixture from leaking. A liquid mixture 8 that hardens in a certain period of time is poured into it. It should be noted that, when the mixture receiver 9 is wound with a rubber tape or the like after it has been cured to some extent, it can be used as a sealing plug even in a state where it is not completely cured.

Fourth Embodiment FIG. 6 is a side view showing a fourth embodiment. Example 4 is an example of producing the sealing plug 4. In this embodiment, the cable core 3 is wrapped with a mixture receiver 9, an air bleeder 12 and an injection hose for a pressure injector 13 are attached, and both ends are fixed with a mixture receiver holder 10. . The liquid mixture 8 is injected using the pressure injector 10, and the air bleeder 12 and the injection hose are closed after the injection. It should be noted that, when the mixture receiver 9 is wound with a rubber tape or the like after it has been cured to some extent, it can be used as a sealing plug even in a state where it is not completely cured.

The material of the admixture receiver 9 used in Example 3 and Example 4 to form the sealing plug 4 is a sheet-like material such as paper, polyethylene, nylon, or a jelly-like sheet, A wide range of materials and shapes are conceivable, including cylindrical ones such as vinyl pipes.

[0011]

[Effect of the invention]

 As described above, according to the present invention, gas can be stopped even in the exposed portion of the core wire of the communication cable, and therefore, in the cable core wire construction with the existing gas-filled cable, Such effects can be expected. After the gas stop method is applied, the gas will not be blown away, so the amount of gas to be filled can be saved. In addition, a cylinder installed adjacent to the work is not required, or a small one can be used, and it is not necessary to check the remaining amount of the cylinder during work, so the operation related to this can be reduced. Moreover, since the gas pressure inside the cable can be secured near the construction site, there is no risk of breakdown due to water infiltration even during work. In addition, it is possible to easily create gas partition walls even with existing gas-filled cables. In addition, since the gas flow can be secured by removing the gas stop member after the work is completed, there is no hindrance to the maintenance of the gas filling cable. That is, the sealing plug does not necessarily have to be removed and can be used repeatedly.

[0012]

[Brief description of drawings]

FIG. 1 is a perspective view of a cross section of a part of a gas stopping method using a sealing plug according to a first embodiment.

FIG. 2 is a cross-sectional view of the first embodiment.

FIG. 3 is a side view of the first embodiment.

FIG. 4 is a perspective view of a gas stopping method using a sealing plug according to a second embodiment.

FIG. 5 is a side view of a method for producing a sealing plug to be attached to a communication cable according to a third embodiment.

FIG. 6 is a side view of a method for producing a sealing plug to be attached to a communication cable according to a fourth embodiment.

[Explanation of symbols]

 1 Communication Cable 2 Cable Outer Cable 3 Cable Core Wire 4 Sealing Plug 5 Tape for Gas Stop 6 Fixture for Gas Stop 7 Buffer Sealant 8 Admixture 9 Admixture Receptor 10 Admixture Retainer 11 Spout 12 Air bleed 13 Pressure injector

Claims (2)

[Utility model registration claims] 1. A sealing plug 4 attached to a cable core wire 3 of a communication cable 1 by using a mixture 8. 2. A cable plug 3 attached to a cable core wire 3 of a communication cable 1 and a cable jacket 2 are fixed so as to be integrated so that the cable is filled. A gas stop method that suppresses the release and flow of dry air (hereinafter gas).