JPH0725718Y2 - 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 Technique FIG. 3 is a front view showing a conventional general potential detecting cable.

In this potential detecting cable, a plurality of potential detecting core wires 61 are bundled into one to form a cable main body 6. As shown in the sectional view of FIG. 4, each potential detecting core wire 61 is made of an insulator 62.
Is fixed with a tape 64 via an inclusion 63, and the outer periphery is covered with a buoyancy body 65. Each potential detection core wire
61 indicates electrodes A, B, and
It is connected to C, D and E. Each electrode A, B, C, D, E
Is set to be naked. Further, the switch mechanism 7 is arranged on the front side of each electrode, and is for disconnecting each core wire 61 from the electrode, and is arranged so as to project outward from the cable main body 6 in order to perform the disconnecting work.

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. Further, in order to accurately measure the potential difference between the respective electrodes, when confirming the short-circuit state between the respective core wires 61, the switch mechanism 7 is used to control the respective core wires 61 and the respective electrodes A, B, C, D, and
Separate from E and perform insulation test in this state.

(C) Problem to be solved by the invention The conventional switch mechanism 7 of the potential detecting cable has a structure as shown in FIG. In FIG. 5, the switch mechanism 7 of the electrode A connected to the core wire 61 is illustrated. In this switch mechanism 7, an insulating rubber mold portion 71 that covers the cable body 6 is extended and projected outward, and a short-circuit plate 73 is provided on the end surface of this protruding portion 72. Three small holes 72a, 72b, 72c are opened at the end of the protruding portion 72, and the short-circuit plate 73 has two holes.
Two fool holes 73a and 73b are opened. Further, the potential detecting core wire 61 is pulled out into the protruding portion 72 and is connected to a cylindrical metal fitting 61a built in the end portion of the protruding portion 72. This tubular fitting 6
The screw hole 61b of 1a is led out to the small hole 72a of the protrusion 72.
In addition, a cylindrical electrode conductor 74 independent of the core wire 61 is built in the protrusion 72, and one end portion 74a of the electrode conductor 74 is incorporated.
The screw hole 74b is led out to the small hole 72b of the protruding portion 72, and the other end is connected to the bare electrode A via the wire rope 75. In the normal state, the screw hole 61b of the tubular metal fitting 61a and the fool hole of the short-circuit plate 73
73a and the screw 76 to stop, and the screw hole 74b of the electrode conductor fitting 74 and the fool hole 73b of the short-circuit plate 73 are connected and screw 76
a stop. As a result, the core wire 61 is electrically connected to the electrode A, and the potential detection measurement state is maintained. A cap 77 is detachably fitted to the end of the protruding portion 72 of the insulating rubber molded portion 71 to secure the liquid tightness of the switch mechanism 7.

When testing the short-circuit state between the potential detection core wires 61, after removing the cap 77, the electrode conductor fitting 74 and the short-circuit plate
Remove the screw fixing to 73 and displace the short-circuit plate 73, and
The b is communicated with the non-electrical (empty state where there is no conduction) screw hole 72c of the protruding portion 72, and is screwed. As a result, the electrical connection between the core wire 61 and the electrode A is cut off.

The work of turning off this switch requires complicated manual work as described above and is not a difficult forgiveness.
The cable itself has to be wound up on the ship or floated above the sea surface to perform the work, and the insulation state confirmation test is extremely difficult.

Further, since the switch mechanism projects outward from the cable main body, there is a disadvantage that the projecting switch mechanism becomes an obstacle and it is difficult to wind the winch (drum).

It is an object of the present invention to solve the above problems, and to provide a potential detection cable which can be easily wound and stored and whose switching mechanism can be easily turned on and off.

(D) Means and Actions for Solving the Problems The potential detection cable of the present invention is a cable main body in which a plurality of potential detection core wires connected to electrodes via a switch are bundled into one, and the cable main body includes the cable main body. And an insulation state measuring core wire for turning on and off each of the switches, and a switch actuating coil connected to the insulation state measuring core wire and arranged corresponding to the switches of the potential detecting core wires. Be prepared for.

In this potential detection cable, a switch mechanism including a switch and a coil for operating the switch is also included in the cable body. Therefore, unlike the conventional case, the switch mechanism does not project outward from the cable body, and it is easy to wind and store the drum. Further, each potential detecting core wire and each electrode which are connected via the switch are normally set in a conductive state to secure the potential detecting state. When the core wire and the electrode are separated, an electric current is passed through the insulation state measuring core wire. As a result, a magnetic field is generated in the switch operating coil. This magnetic field turns off the switch and insulates the core wire from the electrode. In this state, the short-circuit state between the potential detection core wires is confirmed. Therefore, in this insulation test, it suffices to pass a current through the insulation state measuring core wire, the switch can be turned on and off from the ship, and there is no inconvenience such as the necessity of stopping the towed state of the cable as in the conventional case.

(E) Embodiment FIG. 2 is an electric 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
This is composed of the cable main body 1 in which the insulated core wires 11, 12, 13, 14, 15 are insulated with a tape, and the outer circumference of the tape 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 a switch mechanism. Each of the electrodes A, B, C, D, and E is drawn out from the cable 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. 3).

The characteristic of the potential detection cable of this invention is that each potential detection core wire 11, 12, 13, 14, 15 and each electrode A, B, C,
It is in a switch mechanism that turns D and E on and off.

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 reed switch 3 at their tip ends. These electrodes A, B, C, D and E are, as shown in FIG.
It is pulled out further outward and is wound around the outer circumference of the cable body 1 in a bare state. FIG. 1 illustrates a switch mechanism of the electrode A of the core wire 11. The cable body 1 also includes two connected insulation state measuring core wires 2 and 2a. One of the two insulation state measuring core wires 2 and 2a has one of the potential detecting core wires 11, 12, 13, 14, 15
A switch actuating coil 21 is provided corresponding to each reed switch 3. This switch actuation coil
21 is wound around the reed switch 3 as shown in FIG. The terminals of the insulated state measuring core wires 2 and 2a are electrically connected to the connector 5 of the measuring circuit section mounted on the ship, similarly to the terminals of the potential detecting core wires 11, 12, 13, 14, and 15. I am doing it. In the normal state, the reed switch 3 is set to the ON state, and the potential detection core wires 11, 12, 1 are set.
3, 14, 15 and the respective electrodes A, B, C, D, E are in a conductive state, and the potential detection state is secured.

In the potential detection cable having such a configuration, the five potential detection core wires 11, 12, 13, 14, 15 and the insulation state measurement core wires 2, 2a are included in one cable body 1. . In addition, the switch mechanism is the potential detection core wires 11, 12, 13,
The reed switch 3 of 14 and 15 and the switch actuating coil 21 of the insulation state measuring core wire 2 are also included in the cable body 1. Therefore, unlike the conventional case, the switch mechanism does not project outward from the cable body 1, and the winding onto the ship drum is easy. Further, the potential detecting core wires 11, 12, 13, 14, 15 and the electrodes A, B, C, D, which are connected via the reed switch 3,
E is normally set to a conductive state, and a potential detection state is secured. When the core wires 11, 12, 13, 14, 15 and the electrodes A, B, C, D, E are separated, a current is passed through the insulation state measuring core wires 2, 2a. As a result, a magnetic field is generated in each switch operating coil 21. The contact of each reed switch 3 is turned off by this magnetic field, and each core wire 11, 12, 13, 1
4, 15 and each electrode A, B, C, D, E are insulated. In this state, a short state between the potential detecting core wires 11, 12, 13, 14, and 15 is confirmed. Therefore, in this insulation test, it suffices to pass an electric current through the two insulation state measuring core wires 2 and 2a, and the reed switch 3 can be turned on and off from the ship,
It can be carried out even during cable towing.

In the above embodiment, the case where the reed switch and the coil for operating the switch are separately provided has been described.
For this, a reed relay in which a reed switch and a coil for operating the switch are integrated may be used.

(F) Effect of the device In this device, as described above, a plurality of potential detecting core wires having electrodes connected through the switches and an insulating state measuring core wire including the switch actuating coil corresponding to each switch. Since the switch is included in one cable main body, the switch mechanism does not project to the outside of the cable main body, and can be easily wound and stored in the drum. Further, each electric potential detecting core wire and each electrode can be easily separated from each other simply by passing a current through the insulating state measuring core wire, and the short-circuit state of each electric potential detecting core wire can be confirmed even during cable towing.

Therefore, as in the past, in order to confirm the short-circuited state of each potential detecting core wire, the towed state of the cable is stopped, the cable is wound up on the ship, or the cable is floated on the sea surface, and the operator operates the switch mechanism. Remove the cap of
It has an excellent effect of achieving the object of the invention, such as eliminating troublesome work such as turning on and off the switch (short-circuit plate).

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a main part of an embodiment potential detection cable, FIG. 2 is an explanatory view showing an electric connection state of the embodiment potential detection cable, and FIG. 3 is a front view showing a conventional potential detection cable. 4 and 5 are cross-sectional views showing a conventional potential detection cable, FIG. 5 is a cross-sectional view showing a switch mechanism of a conventional potential detection cable, and FIG. 6 is an explanation showing a main part of a conventional switch mechanism. It is a figure. 1: Cable body, 2.2a: Insulation state measurement core wire, 3: Reed switch, 11, 12, 13, 14, 15: Potential detection core wire 21: Switch operating coil, A, B, C, D, E :electrode.

Claims (1)

[Scope of utility model registration request] 1. A cable body in which a plurality of potential detecting core wires connected to electrodes via a switch are bundled together, and an insulated state measuring core wire included in the cable body for turning on and off each of the switches. And a switch operating coil which is connected to the insulated state measuring core wire and is arranged corresponding to the switch of each of the potential detecting core wires.