SU803053A1 - Contact couple - Google Patents

Description

(54) CONTACT PAIR

one

The invention relates to electrical engineering, in particular to electrical connectors intended for operation in a moist electrically conductive environment.

Known electrical connector, designed for operation in an electrically conductive medium 1.

The disadvantage of this connector is unreliable sealing, because over time and as the number of joints increases, as a result of relaxation processes, as well as due to repeated punctures of the same film section, the holes formed in the film do not tighten and the electrically conductive medium gets contacts, which leads to their closure.

Also known electrical connector containing a cylindrical pin and a socket, covering the pin 2.

A disadvantage of this device is the unreliable protection of contacts when operating in a moist electrically conductive environment.

The aim of the invention is to increase reliability.

This goal is achieved by the fact that the working surface of the Igryr is covered with a protective film, while on the surface of the pin there are holes filled with a substance that reacts with the working medium and the material of the pin and restores the damaged protective film.

The invention is illustrated in the drawings, where in FIG. 1 shows a general view of the connector; in fig. 2 - pin; in fig. 3 is a cross-section BB of FIG. 2 (layers of coating are conditionally increased); in fig. 4 - contact pair.

The described connector consists of two parts - plug 1 and socket 2.

On the housing 3 of the socket 2, there is a lead-in annular protrusion 4, and on the housing 5 of the plug 1 there is a corresponding notch 6.

In order to ensure unambiguity of the articulation of the contacts, the connector has a key-keys 7 on the housing 3 sockets and corresponding slots on the cortus 5 plugs.

Claims (2)

In case 5 of the plug 1, a nut 8 is fixed to a sealed insulator 9 with pin contacts 10 made of a copper alloy, for example bronze. On the working part of each contact 10, several recesses were made in the form of longitudinal grooves 11 (Fig. 2). The entire contact (working) surface of the contacts 10, protruding from the insulator 9, is covered with a protective film consisting of a dielectric film 12, which is the metal oxide of which the contact 10 is made (for example, CujO), and an oxidizer film 13 (for example KMpO4). The thickness of the layers of the dielectric film and the oxidant is several tens of microns each. The longitudinal grooves 11 of the contacts 10 are completely filled with the indicated oxidizing agent 13, creating a certain amount of it (Fig. 3). The insulator 9 is hermetically sealed in the case of plug 5 by ring 14. In case 3 of socket 2, an insulator pack 15 with contacts-sockets 16 is fixed, fixed with nut 17. Plug I is sealed to the object by means of o-rings 18 To mount the wiring for plug 19 of plug 1 and 20 sockets 2 are compounded. The plug of plug 1 and socket 2 is sealed with a ring 21. The work of the connector is as follows. The connector articulates in the absence of moisture. Access of a wet electrically conductive medium to the contacts of an articulated connector is excluded by the hermetic design of the connector. When the connector is articulated at the point of contact between the mating parts — plugs and sockets, the protective film is mechanically destroyed without impeding the passage of current. After the connector is dismembered and a humid electrically conductive medium hits the contacts 10, which are under voltage, in places of damage to the protective film, instantaneous, due to the presence of oxidant 13, oxidation of the bare metal (bronze) contact occurs with the formation of a layer of non-electrically conductive oxides (oxidized copper oxides, manganese oxides), interrupted by the closure of the contacts between themselves with an electrically conducting medium. During operation of the connector, the oxidation layer may wear out, therefore, to ensure the formation of a non-conductive layer, an additional amount of oxidant 13 is inserted in the longitudinal grooves 11 of the contacts 10, contributing to the oxidation process as the oxidized layer deteriorates. The thickness of the layer of non-conductive oxides on previously damaged contact surfaces increases with time, the insulation of contacts 10 is parabolic and reaches a certain value, the value of which can be determined by the potential difference of the insulated contacts 10, electrolyte composition (inducing medium), temperature . The deposition of a dielectric film and an oxidizer film on the exposed parts of the contacts (protruding from the insulator) of the contacts ensures reliable protection of the contacts from this environment. The presence of longitudinal grooves (recesses) on the working part of the contacts creates a certain stock of oxidant, contributing to the extension of the service life of the connector. Claim of the invention: A contact pair containing a cylinder-facing plug and a nest covering a pin, characterized in that, in order to increase reliability, the working surface of the pin is covered with a protective film, while the surface of the pin is filled with a substance that reacts with the medium and the material of the pin and restores the damaged protective film. Sources of information taken into account during the examination 1. USSR author's certificate No. 555470, cl. H 01 R 7/06, 1976. 2. Belousov A. I. Electric plug-in contacts in electronic equipment, M., Energie, 1975, p. 242, fig. 610. ten fug / Figg