RU2419931C1 - Submerged electric connector - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: submerged electric connector consists of coaxial socket and plug. Connector consists of coaxial socket and plug. Current-carrying thin-wall cylinders of connector are made in the form of shells entering each other, into the bottom of which central pins electrically connected to bottom are mounted. Inductance coils are arranged inside shells between cylinders and central pins on ferrite rings and connected to source and receiver of signal. When in closed position, both halves of connector represent short-circuited turn through which transformer connection between inductance coils of instrument and diving parts is performed.

EFFECT: increasing efficiency coefficient of connector and providing the possibility of using the connector in multiple-channel devices of transfer of electric energy from full electric isolation between channels at their close location irrespective of the fact whether halves of connectors are open or closed.

3 dwg

Description

The invention relates to methods for transmitting alternating current from one device to another using transformer electromagnetic coupling.

Known non-contact transformer electrical connectors used to communicate a diver-swimmer with towed sonar equipment. For example, in the drive and direction finding hydroacoustic station (GAS) MGV-3 (Nerey) developed by the Volgograd plant Akhtuba (Chief designer Zhabin ON, 1968) a sealed transformer connector was used to transmit the sound signal received from the hydroacoustic lighthouse in the diver's phone.

The connector was a SB-3 ferrite pot, consisting of two halves (half transformers), with two electric coils inside. One half of the pot with the coil was at the diver's and connected to the TA-56 telephone capsule, the other half with its coil belonged to the GAS MGV-3 station and connected to the output of the low-frequency amplifier. When the diver connected his half of the connector with the half installed on the towed HAS, the magnetic circuit was closed and there was a transformer connection between the coils. Thus, the signal from the HAS was transmitted to the diver's telephone capsule and he heard the signals of the sonar beacon. Both halves of a ferrite pot with coils (half transformers) were sealed with an epoxy compound and placed in a duralumin case.

Known sealed non-contact transformer electrical connector, which is part of the GAS communication diver MGV-6V ("Eel-V") developed by the Leningrad plant "Vodtranspribor" (Chief Designer Talanov LP, 1972).

This connector had two communication channels: telephone and microphone. Both halves of half-transformer ferrite pots (SB-3 - telephone and SB-1 - microphone) were installed in a common sealed enclosure, next to each other, in the same plane. One half of the connector with a cable was connected to the microphone and telephone headset of a diver, the other half was installed on the GAS control panel. Telephone and microphone half-transformers were enclosed in a titanium case and covered with thin plates of stainless (non-magnetic) steel from the working side. Since hydroacoustic communication between the divers was carried out in simplex mode, the isolation coefficient between the telephone and microphone channels was not important.

Contact coaxial electrical connectors are also widely known for connecting a coaxial cable (for example, a television cable to a television set) or for connecting two coaxial cables (these connections are divided into threaded, bayonet or cut type). Each coaxial connector consists of two halves (sockets and plugs), each of which has an external conductive thin-walled cylinder and an internal central pin contact. In this case, the outer cylinder and the pin contact are isolated from each other by fluoroplastic or ceramic. Coating of the coaxial cable is connected to the outer cylinder, and the central core of the cable is connected to the inner pin contact. When the halves of the coaxial connector are cut together, the outer thin-walled cylinders enter each other (with some effort to ensure good contact), and the pin contact of one half enters the pin socket of the other half of the connector (also with some effort).

The connectors described above are analogous to the invention. The patent RU LLC ITRON No. 2170481 of July 26, 2000 can also be considered an analogue of the invention.

As a prototype, a two-channel transformer electrical connector developed by the Vodtranspribor plant, which is currently used in the GAS communications MGV-6V (Eel-V), is presented. The disadvantage of this connector is the low coefficient of electrical isolation (30 dB voltage) between the telephone and microphone channels, if both halves of the connector are open (open magnetic cores of transformers).

As noted above, the half-transformers in both halves of this connector are in the same plane and the magnetic lines of force from the telephone channel penetrate the microphone channel. When the connector halves are closed (i.e., half-transformer magnetic cores are closed), the isolation coefficient between the channels reaches 80 dB, which is quite acceptable. The low isolation coefficient did not allow the use of the contactless electrical connector from the MGV-6V equipment in the on-board intercom (BPU-7), which provides duplex communication between six divers located in the transporter of the divers or in the lock chamber of the submarine (all six telephone channels are connected in parallel and all six microphone channels connected in parallel). The low isolation coefficient between the telephone and microphone channels led to self-excitation of the BPU amplifier (gain of about 60 dB) as soon as at least one of the connectors opened. Communication between the other remaining divers became impossible.

The objective of the present invention is the creation of a transformer electrical connector with permanently closed magnetic circuits, which provides a complete (100%) isolation of the inductance coils of this connector in magnetic flux from the same type of connectors located at a close distance (close). Moreover, the number of communication channels can be unlimited. (Verified by the author on a three-channel connector).

The problem is solved by placing transformer coils, made on ferrite rings and filled with sealant, in each of the halves of the coaxial connector (in the socket and in the plug), and the energy (signal) is transferred from one half of the connector to the other using a short-circuited coil having a small electrical resistance. A short-circuited coil is formed when both halves of the connector are connected, each of which is a coaxial pair (socket and plug) containing an external thin-walled conductive cylinder and an internal central pin contact. In this case (in contrast to the known coaxial connectors), the outer cylinder is made in the form of a thin-walled metal cup, in the bottom of which a central pin contact is electrically connected to the cylinder.

The resistance of a closed loop is thousandths of ohms, the current in a closed loop is from a few amperes to tens of amperes (depending on the transmitted power), and the voltage is hundredths of a volt.

With the multi-channel version of the connector, the magnetic circuits of all channels are closed inside each connector and the magnetic lines of force do not affect each other, and the currents in each half of the connector are closed inside the thin-walled cylinder through the water and flow from the central pin to the cylinder and vice versa. It turns out that the outer cylindrical shell of the connector completely shields the inner central pin, providing 100% electrical isolation between the channels.

Figure 1 shows the electrical circuit of the connector.

Figure 2 shows the structural diagram of the connector.

Figure 3 shows the device underwater two-channel underwater electrical connector.

The numbers in figures 1 and 2 indicate: 1 - inductor of the instrument part of the connector; 2 - inductor of the diving part of the connector; 3 - half turn of the instrument part of the connector (socket); 4 - half turn of the diving part of the connector (plug); 5 - magnetic circuit (ferrite ring) of the instrument part of the connector; 6 - magnetic circuit (ferrite ring) of the diving part of the connector: 7 - pin; 8 - socket for the pin.

In figure 3, the numbers denote: 1 - inductor of the instrument part of the connector, filled with sealant and connected to the signal source; 2 - inductance coil of the diving part of the connector, filled with sealant and connected to the microphone and telephone headset of the diver; 5 - magnetic circuit (ferrite ring) of the instrument part of the connector; 6 - magnetic circuit (ferrite ring) of the diving part of the connector: 7 - central pin (plug); 8 - socket for a pin (socket); 9 - outer cylinder of the connector (socket); 10 - inner cylinder of the connector (plug); 11 - the general case of the instrument part of the connector; 12 - the general case of the diving part of the connector; 13 - the device body; 14 - stuffing box entry for diver cable.

The underwater electrical connector operates as follows.

In the open state, each half of the connector (socket and plug) is closed through sea water, the resistance of which is about 2 ohms at a salinity of 35 ‰ (in fresh water, the resistance is thousands of ohms). Such resistance does not affect the parameters of the output stage of the signal source (does not load it). A weak current (milliamps) passes inside the glass from the cylindrical shell to the central pin and back, without going beyond the connector and without affecting adjacent channels.

In the closed state, both halves of the connector are a short-circuited turn, the current in which is several amperes and through it transformer coupling between the inductance coils of the instrument and diving parts is carried out. In this case, the efficiency of the connector reaches 98% with good electrical contact between the outlet and the plug. To ensure good contact, both thin-walled cylinders and both pins should be made of metal with good electrical conductivity (brass, bronze, beryllium bronze) and gilded.

The connector can be used for duplex communication between divers located in the transporter of the divers, as well as for taking telemetry information from several medical sensors mounted on the diver's body. The connector can also be used to transfer electricity in the form of alternating current from a source to a consumer connected to a source under water.

Claims (1)

Underwater electrical connector, consisting of a coaxial socket and plug, characterized in that the external thin-walled conductive cylinders of the connector are made in the form of cups that fit into each other (sockets and plugs), in the bottom of which central pins (socket and plug) are mounted, electrically connected to the bottom, and inside the cups between the cylinders and the central pins, inductors are placed on ferrite rings connected to devices transmitting and receiving a signal.

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