JPH0645879Y2 - Potential detection cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a potential detection cable towed by a ship and used for measuring electrical conductivity in the sea.

(B) Conventional technology In general, a potential detection cable includes a plurality of (for example, five) potential detection core wires 11, 12, 13, 14, as shown in FIG.
The cable body 1 is formed by bundling 15 into one, and bare electrodes A, B, C, D, and E corresponding to the potential detection core wires are provided at appropriate positions outside the cable body 1.

When measuring the electrical conductivity in the sea, tow this potential detection cable, apply a voltage to each electrode A, B, C, D, E,
The electrical conductivity in the sea is calculated by detecting the potential difference between the electrodes. When a voltage is applied to each electrode, a voltage is generated between the electrodes due to the current passing through the seawater. The precision of this induced voltage depends on the electrode spacing and the insulation resistance between each core wire. Therefore, when measuring the conductivity, it is necessary to measure the insulation resistance between the core wires in advance. Therefore, as shown in FIG. 4, in the potential detecting cable, the switch means 3 for connecting and disconnecting the potential detecting core wire and the electrode is provided near the electrode of the cable body 1.

FIG. 5 is a cross-sectional view of essential parts showing the switch means 3 for the core wire 11 and the electrode A. In this potential detection cable, for example, a bare electrode wire A corresponding to the potential detection core wire 11 is provided at an appropriate place outside the cable body 1 including five potential detection core wires 11 (12, 13, 14, 15). At the same time, the terminal portion (screw hole) A1 of the electrode wire A and the terminal portion (screw hole) 11a of the potential detecting core wire 11 independent of the electrode wire A are provided on the protruding tip portion 21 of the insulating mold portion 2. A switch means 3 for electrically connecting and disconnecting the terminal portions A1 and 11a is provided at the protruding tip portion 21 of the insulating mold portion 2. This switch means 3 is
As shown in FIG. 6, the short circuit plate 5 is used. That is,
The protruding tip portion 21 of the insulating mold portion 2 has three small holes 21.
A, 21b, 21c are opened, and two short holes 51a, 51b are opened in the short-circuit plate 5. Therefore, when measuring the electric conductivity, the screw hole 11a and the stupid hole 51a of the short-circuit plate 5 are communicated with each other and fastened with the screw 6, and the screw hole A1 and the stupid hole 51b of the short-circuit plate 5 are connected.
And connect with screw 6a. As a result, the core wire 11 and the electrode A are electrically connected, and the potential detection measurement state is maintained. On the other hand, when testing the short-circuit state between the electrode detecting core wires 11, 12, 13, 14, and 15, the protruding portion 21 of the insulating mold portion 2 is tested.
Remove the waterproof cap 4 that fits in the and then remove the screw 6a.
Then, the short-circuit plate 5 which is in the free state is displaced, and the stupid hole 51b is communicated with the non-electrical (empty state where there is no conduction) screw hole 22c of the projecting portion 21 and screwed. As a result, the electrical connection between the core wire 11 and the electrode A is cut off, and the short-circuit state of the core wire can be tested.

(C) Problems to be solved by the invention In the case of the above-described conventional potential detection cable, when performing electrical contact / separation (conduction / insulation) between the electrode and the core wire, loosen the screw that is fastened and short-circuit plate. It is necessary to fix the screws after changing the mounting direction. Since the short-circuit plate and the screw are very small, the work of displacing the short-circuit plate, the work of removing and fixing the screw are complicated, and the work is troublesome.

It is an object of the present invention to provide a potential detection cable that enables electrical contact and separation between an electrode and a core wire by a simple work.

(D) Means and Actions for Solving the Problem In order to achieve this object, the potential detection cable of the present invention has the following configuration.

The potential detection cable is such that a bare electrode wire corresponding to the potential detection core wire is arranged at an appropriate place outside the cable body containing a plurality of potential detection core wires, and the external protruding insulating mold part of the cable body is provided with the above-mentioned. A switch means for exposing the terminal of the electrode wire and the terminal of the potential detecting core wire and electrically connecting and disconnecting each terminal to the insulating mold portion is provided, wherein the switch means is the insulating mold portion. The cylindrical cap body with both ends opening that is detachably fitted to the tip of the, the partition-shaped insulating rubber portion arranged in the center of the inside of the cylindrical cap body, and fixed to one surface of this insulating rubber portion, the insulating mold When the cap body is fitted to the portion, the metal plate is characterized by being made of a metal plate that brings the potential detecting core wire and the electrode wire into conduction by contacting the terminals.

In the potential detection cable having such a configuration, the cap body is used as the switch means. Both ends of this cap body are open, and a threaded portion that is screwed into an outer peripheral threaded portion of the insulating mold portion is formed on the inner peripheral surface of each opening of both ends. Further, a partition-shaped insulating rubber is provided in the center of the length inside the cap body, and a metal plate is provided only on one surface of the insulating rubber.

When measuring the electrical conductivity, to the tip (each terminal part) of the insulating mold part that has the core wire and each terminal of the electrode in a protruding shape,
The cap body is screwed on with the opening end on the metal plate deployment side facing the front side. This allows the core wire terminal (protruding contact)
And the electrode terminal (protruding contact) come into contact with the metal plate, and the potential detecting core wire and the electrode are electrically connected through the metal plate, and the electrical conductivity is measured. On the other hand, when measuring the insulation state of each core wire, with respect to the tip of the insulating mold part, with the opening end on the side where the metal plate is not deployed (the side opposite to the metal plate deployment side) as the front side,
Screw on the cap body. As a result, the core wire terminal and the electrode terminal cannot contact the metal plate and do not conduct, so that the insulation state of the core wire can be measured. That is, the core wire and the electrode can be turned on and off by a simple operation of selecting either the left or right end of the opening of both ends of the cap body and screwing the cap body to the insulating mold portion.

(E) Embodiment FIG. 3 is an electrical connection explanatory view showing a concrete embodiment of the potential detecting cable according to the present invention.

As is well known, a plurality of potential detection cables (for example, 5
Tape) for the potential detection cores 11, 12, 13, 14, 15
It is composed of a cable body 1 which is bundled into a book and whose outer circumference is covered with a buoyant body. The potential detecting core wires 11, 12, 13, 14, 15 having different lengths are provided with electrodes A, B, C, D, and E at their tips through the switch means 3. The electrodes (electrode wires) A, B, C, D, and E are drawn out from the cable main body 1 and wound in a bare shape. In this structure, the cable body 1 is no different from the conventional potential detection cable (FIG. 4).

The features of the potential detection cable of this invention are that each potential detection core wire 11, 12, 13, 14, 15 and each electrode A, B, C ,.
The switch means 3 electrically connects (separates) with D and E.

The potential detecting core wires 11, 12, 13, 14, and 15 are respectively connected to the electrodes A, B, C, D, and E through the switch means 3 at the tips thereof. These electrodes A, B, C, D and E are the first
As shown in the drawing, the cable body 1 is pulled out from the external protruding insulating rubber mold portion 2 and is wound around the outer circumference of the cable body 1 in a bare shape.

1 and 2 exemplify the switch means 3 of the electrode A of the potential detecting core wire 11.

One end of the potential detecting core wire 11 included in the cable main body 1 and one end of the bare electrode A wound around the outer circumference of the cable main body 1 are insulated mold parts via electric connection wires A2 and 11b, respectively. 2 is extended to the end surface of the outwardly projecting tip portion 21, and the terminals (protruding contacts) A1 and 11a are respectively provided on the end surface of the tip portion 21 so as to project. Further, an engaging protrusion for fitting the waterproof cap 4 is provided on the outer surface of the tip end portion 21 on the base end side.

The switch means 3 includes a tubular cap body 31 and two partition-shaped insulating rubbers 32 provided inside the cap body 31.
32a and a metal plate 3 attached to one side of one insulating rubber 32
Composed of 3 and.

The cap body 31 is a tubular body having openings at both ends, and the protruding tip portions of the insulating mold portion 2 are respectively provided on the inner peripheral surfaces of the openings at both ends.
A screw portion 34 that is screwed into the screw portion 22 provided on the outer periphery of the 21 is provided. As a result, the cap main body 31 (both the left and right open end portions) at any of the open end portions of its both end portions,
Insulation mold part 2 tip part (protruding terminal protruding part) 21
It is set so that it can be screwed on. Further, inside the cap main body 31, two insulating rubbers 32 and 32a having a U-shaped cross section having a recess 32c in the plane at the center of the length are attached back to back. Therefore, in the center of the length of the cap body 31, the left and right chambers are partitioned by the insulating rubbers 32 and 32a. Further, one insulating rubber 32 has a recess 32
A metal plate (copper terminal) 33 is provided at c. Therefore, the metal plate 33 communicates with the one end opening side of the cap body 1. The mounting position of this metal plate 33 is
In the state where 31 is screwed to the tip 21 of the insulating mold portion, the terminal (protruding contact) A1 of the electrode and the terminal (protruding contact) 11 of the potential detecting core wire which are arranged in a protruding manner on the end face of the tip 21 are provided.
It is set to come into contact with a.

By using the potential detection cable having such a configuration,
When measuring the short-circuit state of each of the potential detecting core wires 1, 12, 13, 14, 15, as shown in FIG.
The other end side of the opening of the cap body 31 is connected to the tip end portion 21 of the insulating mold portion so that the metal plate 33 of the cap body 31 does not face the contacts A1 and 11a.
Screw on. In this case, the concave portion 3 of the other insulating rubber 32a
Since 2c faces the terminals (respective protruding contacts) A1 and 11a, the protruding contacts A1 and 11a do not conduct, and the potential detecting core wire 11 and the electrode A are turned off. As a result, the potential detection core wire 11
The short state can be measured from the resistance state of

On the other hand, when measuring the electrical conductivity of the seabed, as shown in FIG. 2, the metal plate 33 of the cap body 31 is connected to the contacts A1, 11a.
The one end portion side of the opening of the cap body 31 is screwed to the tip end portion 21 of the insulating mold portion so as to face the. In this case, the metal plate 33 comes into contact with the protruding contacts A1 and 11a. This allows
The potential detecting core wire 11 and the electrode A are electrically connected (turned on) via the metal plate 33, and the potential measurement state is set.

Thus, the cap main body 31 is attached to the insulating mold portion (the tip 2
1) When screwing to 2, the electrical connection between the potential detection core wire 11 and the electrode A can be performed by a simple operation of selecting and screwing either one of the open ends of the cap body 31. It is possible to achieve specific contact and separation.

In the implementation, the characters on the outer surface of the cap body 31, for example, the letters "Measure" on the outer surface corresponding to the insulating rubber 32 on which the metal plate 33 is arranged, and the insulating rubber 32 on which the metal plate 33 is not arranged.
The word "isolated" may be specified on the outer surface corresponding to a.
In this case, when the cap body 31 is screwed onto the insulating mold portion 2, it can be recognized at a glance whether the switch means 3 is in the ON state or the OFF state from the outside.

In addition, in the embodiment, an example in which the cap main body 31 is switched on and off by selecting and screwing the left and right ends of both end openings to the insulating mold portion (tip portion 21) 2 has been shown. At that time, by adjusting the screwing depth of the cap main body 31 with respect to the insulating mold portion 2 (shallow screwing is performed, and the metal plate 33 and the contacts A1 and 11a are screwed to each other so as not to make contact with each other. Switch). In this case, it is not necessary to remove the cap body 31 from the insulating mold portion 2 each time the switch is turned on and off.

(F) Effect of the Invention According to this invention, as described above, the cylindrical cap body having the opening at both ends that is detachably fitted to the tip of the insulating mold portion provided with the core wire and each terminal of the electrode in a protruding shape is provided. Since the partition-shaped insulating rubber portion is provided at the center of the inside and the switch means is configured by providing a metal plate on one surface of this insulating rubber portion, both ends of the opening of the cap body are selected and The core wire and the electrode can be electrically turned on and off by a simple operation of simply screwing the cap body. Therefore, there is an excellent effect that the object of the invention is achieved, such as a simple structure and an inexpensive switch means can be realized without requiring complicated work as in the conventional case.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing a main part of an embodiment potential detection cable, FIG. 2 is a sectional view showing an example in which a core wire and electrodes of the embodiment potential detection cable are in an ON state, and FIG. FIG. 4 is an explanatory view showing an electric connection state of an electric potential detecting cable of an embodiment, FIG. 4 is a front view showing a general electric potential detecting cable, and FIG. 5 is a sectional view showing a main part of a conventional electric potential detecting cable. FIG. 6 is an explanatory view of a main part showing a switch means of a conventional potential detecting cable. 1: Cable body, 2: Insulation molded part, 3: Switch means, 11: Potential detecting core wire, 31: Cap body, 32: Insulating rubber, 33: Metal plate, 11a: Core wire terminal, A: Electrode, A1 : Electrode terminal.

Claims (1)

[Scope of utility model registration request] 1. A bare electrode wire corresponding to the potential detecting core wire is provided at an appropriate position outside the cable body containing a plurality of potential detecting core wires, and the external protruding insulating mold part of the cable body is provided with the above-mentioned. In a potential detection cable in which a terminal of an electrode wire and a terminal of a core wire for potential detection are exposed, and a switch means for electrically connecting and disconnecting each terminal is provided in the insulating mold portion, the switch means is an insulating mold portion. The cylindrical cap body with both ends opening that is detachably fitted to the tip of the, the partition-shaped insulating rubber portion arranged in the center of the inside of the cylindrical cap body, and fixed to one surface of this insulating rubber portion, the insulating mold A potential detection cable, comprising a metal plate that makes the potential detection core wire and the electrode wire conductive by contacting the terminals when the cap body is fitted to the portion.