Low-voltage safety control device based on PLC

Abstract

The invention discloses a low-voltage safety control device based on a PLC. The invention belongs to the technical field of safety control devices. A control button and a control switch are mounted onthe surface of a shell; the back surface of the shell is fixedly connected with a cover plate through screws; the surface of one side of the cover plate is in contact connection with a mounting box;the surface of the mounting box is fixedly connected with the inner wall of the shell; the mounting is provided with an installation groove, radially symmetrical mounting holes are formed in the innerwall of the mounting groove; each mounting hole is in threaded connection with a fixed rod; the surface of the fixed rod is axially sleeved with a cooling fan in a sliding manner; the cooling fan arranged on the low-voltage safety control device based on the PLC is convenient to install and maintain in the later period; and arranged damping springs and damping sleeves have the damping function, the vibration force generated by work of the cooling fan is greatly reduced, the arranged warning lamp can be conveniently and rapidly assembled and disassembled by workers, and the height position ofthe warning lamp can be freely adjusted according to needs.

Description

technical field [0001] The present invention relates to the technical field of safety control devices, and more specifically, relates to a low-voltage safety control device based on PLC. Background technique [0002] At present, the working conditions of low-voltage power systems in some engineering operation sites mainly include: black start working conditions, emergency working conditions, reverse power operation conditions and reverse power transmission conditions. According to different working conditions, the system needs to make different response actions . [0003] However, most of the heat dissipation fans provided in the existing low-voltage safety control devices do not have the function of buffering and shock absorption. The vibration force generated by the long-time operation of the heat dissipation fan will continue to vibrate the internal components of the low-voltage safety control device, and the components are subject to vibration for a long time. The influ...

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Problems solved by technology

[0003] However, most of the heat dissipation fans provided in the existing low-voltage safety control devices do not have the function of buffering and shock absorption. The vibration force generated by the long-time operation of the heat dissipation fan will continue to vibrate the internal components of the low-voltage safety control device, and the components are subject to vibration for a long time. The influence of the influence may cause loosening, which reduces the stability of the low-voltage safety control device, and the height of the warning lamps set by the existing low-voltage safety control device is mostly fixed, and the height cannot be adjusted, which may be carried out by other objects. Covering will affect the warning effect. Therefore, we have designed a low-voltage safety control device based on PLC to solve the above problems.

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