Maintenance telephone system meeting use demands of domestic nuclear power plant

Abstract

The invention belongs to the technical field of nuclear power plants, and specifically relates to a maintenance telephone system meeting use demands of a domestic nuclear power plant. The system comprises a maintenance telephone system host, an emergency transfer box, wall-mounted communication sockets, a portable maintenance telephone terminal, and a cable dividing box. All subscriber lines of the maintenance telephone system host and all emergency loop lines of the emergency transfer box are connected to a wire distribution strip, and then are connected to the cable dividing box through a user cable. Each pair of subscriber lines in the cable dividing box are connected to normal mode jacks of each wall-mounted communication socket in a star-shaped manner. The emergency loop lines in the cable dividing box enable the emergency mode jacks of all wall-mounted communication sockets in the emergency loop to be connected in parallel in a bus mode through telephone lines. The portable maintenance telephone terminal is connected with the normal mode jacks or emergency mode jacks corresponding to the wall-mounted communication sockets in working modes (normal mode or emergency mode), thereby completing the connection for communication.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plant communication, and in particular relates to a maintenance telephone system that meets the use requirements of domestic nuclear power plants. Background technique [0002] At present, there are few special-purpose products that meet domestic nuclear power plant maintenance telephones, which are generally replaced by acoustic telephones or ordinary telephones, which are difficult to meet the actual needs of nuclear power plant on-site maintenance. Although the voice phone can be used without a host and passive source, it can only be used in a small area, such as ships, small workshops, etc., due to the limitation of the call distance and call function, and cannot realize point-to-point calls; although ordinary phones have a call distance It is far away, generally up to 5-6Km, but ordinary telephones must rely on telephone switches or other host equipment for use, and additional power dis...

AI Technical Summary

Problems solved by technology

Although the voice phone can be used without a host and passive source, it can only be used in a small area, such as ships, small workshops, etc., due to the limitation of the call distance and call function, and it cannot realize point-to-point calls; although ordinary phones have a call distance It is far away, usually up to 5-6Km, but ordinary telephones must rely on telephone switches or other host equipment for use, and additional power distribution is required. Once the power supply is lost or the telephone exchange host equipment is paralyzed due to various reasons, ordinary telephones cannot be used.

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