Automatic dehumidifier for concealed-type cable channel

Abstract

The invention discloses an automatic dehumidifier for a concealed-type cable channel, belonging to the technical field of electric power protection devices. The dehumidifier comprises a cover body with both ends open. The lower end of the cover body is communicated to a cable channel. The upper end of the cover body is provided with a rainhat. The sidewall of the cover body is provided with a fan. A humidity sensor, which is used to detect the humidity inside the cable channel, is installed on a sidewall of the lower end of the cover body. A motor of the fan is provided with a control module which is inductively activated with the humidity sensor. The humidity sensor transfers a detected signal of the humidity inside the cable channel to the control module. When the humidity inside the cable channel is higher than a pre-determined value, the motor of the fan is started to ventilate and dehumidify the cable channel by the control of the control module. By use of the automatic dehumidifier, the ventilation effect inside a cable channel is improved, the humidity inside the cable channel is reduced, cables inside the cable channel are protected from being damaged, and hidden safety problems of the electric power operation are reduced.

Description

technical field [0001] The invention belongs to the technical field of power protection devices, in particular to a concealed automatic dehumidifier for cable trenches. Background technique [0002] The cables in the cable trench of the substation are mainly control cables and communication cables, and most of them are laid in the same trench with multiple circuits. In order to prevent water, small animals and other sundries from entering the cable trench and affecting the use of cables, the cable trench generally adopts reinforced concrete cover plates Carry out sealing treatment, because the cable trench is sealed all the year round, the humidity in the cable trench is relatively high, especially in the thunderstorm season, the water in the cable trench is very easy to seep and accumulate, and the water is not easy to discharge and evaporate. The cable is in a humid environment for a long time, which will cause the following Adverse consequences: 1. The insulation of the c...

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Problems solved by technology

[0002] The cables in the cable trench of the substation are mainly control cables and communication cables, which are mostly laid in the same trench with multiple circuits. In order to prevent water, small animals and other sundries from entering the cable trench and affecting the use of cables, the cable trench generally adopts reinforced concrete cover plates Carry out sealing treatment, because the cable trench is sealed all the year round, the humidity in the cable trench is relatively high, especially in the thunderstorm season, the water in the cable trench is very easy to seep and accumulate, and the water is not easy to discharge and evaporate. The cable is in a humid environment for a long time, which will cause the following Adverse consequences: 1. The insulation of the cable is reduced, and the cable is easy to age after a long time, and the hazard of leakage occurs; 2. The grounding wire network in the cable trench is easily corroded in a humid environment, resulting in poor grounding and grounding resistance that does not meet the requirements. , can not play the role of grounding protection, causing accidents in the operation of the power grid; 3. When the air humidity in the ditch is high, it is easy to cause DC grounding of the secondary equipment, which seriously threatens the safe operation of the relay protection equipment in the substation, causing the protection equipment in A failure of high-voltage equipment means that it cannot operate normally, which threatens the safe and stable operation of the entire power grid and is not conducive to the stability of equipment operation.

[0003] At present, there is no effective means to control the air humidity in the cable trench in the substation

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