Explosionproof electrical connector, plug and socket thereof

Abstract

The invention relates to an explosionproof electrical connector, plug and socket thereof. The plug comprises a plug shell and a plug assembly. The plug assembly is arranged in one end of the plug shell and possesses a plugging bolt. A lateral wall of the plugging bolt is successively provided with two opposite first contacts, two opposite second contacts, and a card which is arranged right above one of the two second contacts, wherein the first contacts, the second contacts and the card are arranged according to a sequence of from the near to the distant to a inserting end of the plugging bolt. The socket comprises a socket shell and a socket assembly. The socket assembly, which is arranged in one end of the socket shell, possesses a plugging bolt aperture which is fit for the plugging bolt to be plugged and rotated and a guide groove, two opposite first electrodes and two opposite second electrodes which are successively arranged on a aperture wall of the plugging bolt aperture. The plugging bolt is inserted into the plugging bolt aperture and is rotated along the guide groove through the card to an angle to a conductive position. The first contacts and the second contacts are respectively electrically connected with the first electrodes and the second electrodes in the conductive position. If the plugging bolt is reversely rotated, the first contacts and the second contacts are separated from the first electrodes and the second electrodes and the power is off.

Description

Technical field [0001] The invention relates to an electrical connection device, in particular to an explosion-proof electrical connection device and its plug and socket. Background technique [0002] In explosive hazardous areas, the connectors between electrical equipment and power sources, such as power sockets, can only allow explosion-proof sockets and plugs. If they are non-explosion-proof plugs, they will explode after being inserted. [0003] At present, the existing explosion-proof electrical connection devices include explosion-proof plugs and explosion-proof sockets. Taking four-phase plugs and sockets as examples, the plug has four plug electrodes and one switch on the insertion end surface, and the socket is provided with four sockets. When the plug is inserted into the socket, the four plug electrodes are correspondingly inserted into the four sockets, and with the rotation of the plug, the switch can conduct with the conductive element, so that the plug Conductive c...

AI Technical Summary

Problems solved by technology

[0004] However, for the electrical connection device with this structure, since the four plug electrodes are all located on the same end face, electric sparks are prone to occur during the conduction process, which has certain potential safety hazards.

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