JP2613460B2 - Terminal processing method and terminal structure for liquid leakage detection line - Google Patents

Description

Description: (a) Industrial application field The present invention relates to a liquid leakage detection line for detecting liquid leakage to a floor or the like of a building, and particularly to a terminal processing method and a terminal structure thereof.

(B) Conventional technology Leakage in a basement, an underpass, or a storage of articles that do not like the intrusion of liquids such as water causes various damages.
Therefore, it is strongly desired to detect the leakage at an early stage to prevent the above loss.

For this reason, conventionally, there has been proposed a device in which two conducting wires (detection wires) are arranged side by side in a place where water leaks easily, and when water leaks, the detection wire is short-circuited and a leak is detected based on a decrease in line resistance. (No. 57-97265). As described above, this device determines that water leaks when the line resistance falls below a certain reference value. However, if the detection line is broken, the resistance remains high even if water leaks. A resistor of about 20KΩ is connected between the two conductors at the end of the detection line so that such a detection error can be prevented and the disconnection can be found quickly.
(Voltage value corresponding to). If the resistance value (voltage value) drops more than this, it is a water leak,
If the resistance value becomes extremely large, it can be determined that the wire is broken.

(C) Problems to be Solved by the Invention However, the length of the detection line varies depending on the laying place, and unless the cable is actually laid, the exact required length cannot be known. Laying place). Therefore, the processing of the terminal unit must be as easy as possible. On the other hand, the connection part of the resistor is mechanically weak and needs to be sealed and fixed.

An object of the present invention is to provide a terminal processing method of a liquid leakage detection line and a terminal structure of a liquid leakage detection line, in which the processing of the terminal is facilitated by using a cap filled with resin.

(D) Means for Solving the Problems A first invention according to the present application is a terminal for a liquid leakage detection line in which two conductors are insulated and covered with a liquid to be detected while maintaining a minute interval therebetween. After removing the covering of the portion to expose the two conductors, connecting a resistor between these two conductors by soldering, and then fitting and sealingly fixing the cap filled with a room temperature curable resin. Features.

A second invention according to this application relates to a liquid leakage detection line in which two conductors are insulated and covered with a liquid to be detected while maintaining a small interval between the two conductors, wherein a resistor is provided between the terminals of the two conductors. Are connected to each other, fitted into a cap filled with resin, and sealed and fixed.

(E) Action The liquid leakage detection line to which the terminal processing method and terminal structure of the present invention are applied is such that the two conductors can be bridged by the liquid to be detected (a braided polyethylene thread or a perforated plastic resin). ). After laying this detection wire at a predetermined laying place, the surplus is cut off, the covering of the terminal portion is peeled off, two conductors are exposed, and a resistor is connected by soldering. ) Is inserted into a cap filled with, and is insulated and sealed.

By fitting into the cap filled with resin in this way and sealing the resistor by curing the resin,
The lead wire of the resistor can be fixed more easily and securely than the fixing with vinyl tape or the like, and the work is easy and the finish is beautiful.

(F) Example FIG. 3 shows a general liquid leakage detection line. Two electrode wires 2, 2 'are helically twisted and housed in the protective braid 3 of the liquid leakage detection wire 1. The electrode wire 2 (2 ') is 0.18mm
Core 2a consisting of flexible conductors made by twisting 30 pieces of soft copper wire
(2'a) and a braided insulation 2b (2'b) provided around the core wire 2a (2'a). Braid insulation 2b (2 '
b) is a braided insulation formed of a polyethylene yarn so as to have a braid density of 50 to 95%. A protective braid 3 of tetron yarn is provided around the twisted two electrode wires 2, 2 '(see Japanese Utility Model Publication No. 62-45388).

FIG. 1 shows a terminal processing method according to a first embodiment of the present invention according to the present invention to which a terminal structure of a liquid leakage detection line having a terminal structure according to a second embodiment of the present invention is applied. It is an external view.

This terminal structure is installed at the site where the above liquid leakage detection line is laid (basement,
In underground passages, etc., it is applied to the tip of the laid liquid leak detection line. At the tip of the leak detection line 1, a resistor 6 (see FIG. 2) of 20 KΩ is connected between the electrodes 2 and 2 'by soldering, and then a cap 4 filled with silicon resin is covered.

2 (A) to 2 (F) are diagrams for explaining a terminal processing method of the liquid leakage detection line. First, protect braid 3 for about 20
It is shifted by 3 mm and tied with cotton thread 4 for 3 to 4 turns and fixed (FIG. 3A). Strip the braided insulation 2b, 2'b of the exposed electrode wires 2, 2 'by several mm, and pre-solder the ends of the core wires 2a, 2'a.
5 'is performed (FIG. 6B). Next, add 20K to one core 2'a.
One lead wire of the Ω resistor 6 is soldered (FIG. (C)), and this is inserted into the insulating tube 7 (FIG. (D)). The length of the insulating tube 7 is preferably about 25 mm. After soldering the other lead wire of the resistor 6 to the other core wire 2a, the protective braid 3 shifted and fixed in the step of FIG. (FIG. 10E). A cap 9 made of vinyl is put on the terminal. The cap 9 has a small hole at the tip end in addition to the fitting opening, and is filled with a room temperature-curable silicone resin. By fitting the end of the liquid leak detection line into the cap 9, the resistor 6 is sealed and fixed to the silicone resin, and the excess silicon resin is discharged from the small hole at the tip. The process is completed by removing the discharged silicone resin and allowing it to stand until it cures.

In this embodiment, a liquid leakage detection wire of a stranded wire subjected to braid insulation has been described. For example, two conductors are sandwiched and insulated by two insulating films, and one of the two insulating films is insulated. The present invention can be similarly applied to a perforated liquid detection line. In this case, the protective braid processing becomes unnecessary.

(G) Effects of the Invention As described above, according to the invention of this application, the resistor can be sealed and fixed only by fitting the resin-filled cap to the portion (terminal portion) to which the terminating resistor is connected. The work is extremely easy as compared with the work using a conventional vinyl tape or the like, and the lead wires of the resistor can be completely fixed. In addition, the finish is beautiful because there is no unevenness unlike vinyl tape. Thus, there is an advantage that the work on the site of laying the liquid leakage detection line is simplified.

[Brief description of the drawings]

FIG. 1 is a diagram showing a terminal structure of a liquid leakage detection line which is an embodiment of the second invention according to this application, and FIGS. 2 (A) to (F) are embodiments of the first invention according to this application. It is a figure explaining the procedure of the terminal part processing method of the liquid leak detection line which is. FIG. 3 is a diagram showing a configuration of a general liquid leakage detection line. 2,2 '... electrode wire, 2a, 2'a ... core wire, 6 ... resistor,
9 ... Cap.

Continuation of the front page (72) Inventor Shinichi Ono 2-3-1 Iwatacho, Higashiosaka-shi, Osaka Tatsuta Electric Wire Co., Ltd. (56) References JP-A-58-21573 (JP, A) JP-A-58 −204711 (JP, A) Actually open 57-97265 (JP, U)

Claims (2)

(57) [Claims] 1. A method for exposing two conductors by peeling off the covering of a terminal portion of a liquid leakage detection wire in which two conductors are insulated so as to be bridgeable with a liquid to be detected while maintaining a minute interval therebetween. ,
After soldering a resistor between these two conductors,
A method for treating a terminal portion of a liquid leakage detection line, wherein the terminal portion is fitted into a cap filled with a room temperature curable resin and sealed and fixed. 2. A liquid leakage detection line in which two conductors are insulated and covered with a liquid to be detected while maintaining a small interval between them, a resistor is connected between terminals of the two conductors, and A terminal structure of a liquid leakage detection line, wherein the terminal structure is fitted and sealed in a cap filled with a liquid.