The invention discloses a fireproof device for a cable shaft and a construction method thereof. The fireproof device comprises a plurality of horizontally arranged partition plates of a flame-retardant material in the cable shaft, a detection device located in the cable shaft and a fire-extinguishing device. The fire-extinguishing device comprises fire-extinguishing tanks embedded into the partition plates, valves located in the ports of the fire-extinguishing tanks and a motor which drives the valves to open and close. Each valve comprises a valve body and a valve element rotatably connectedto the valve body. The valve element stretches out of the valve body along the radial direction of the valve body. Gears engaged to each other are separately arranged on the outer end part of the valve element and an output shaft of the motor. The detection device is in electric signal connection to the motor. The fireproof device has the effects of detecting the temperature of the cable timely and extinguishing fire automatically.

Fireproof device for cable shaft and construction method thereof

The invention provides a monitoring station for an underground cable joint. The monitoring station comprises an underground monitoring device and an overground energy supply device. The underground monitoring device comprises a control box arranged on the portion, close to the cable joint, in a cable groove, a control mechanism and a fire extinguishment mechanism are arranged in the control box, and a first monitoring mechanism is arranged on the control box; a semi-circular rail mechanism is arranged on the portion, above the cable joint, in the cable groove, and a second monitoring mechanismand a fire extinguishment spray nozzle communicated with the fire extinguishment mechanism are arranged on the rail mechanism. According to the monitoring station, the temperature and smoke of the cable joint in the cable groove can be precisely monitored, information is sent to a control center in time, when an abnormity occurs, fire extinguishment or fire inhibition can be conducted on a faultpoint in the field in time, and sufficient time is provided for workers who are about to conducting overhauling.

Monitoring station for underground cable joint

The invention belongs to the technical field of electronic circuits, and provides an alarm circuit and device for cable protection. After the alarm circuit changes the voltage of a voltage signal output from a power supply module, on the one hand, when the temperature of a cable is detected to exceed a preset temperature value, a loop connected with a load is disconnected, and on the other hand, when the current of the cable is detected to exceed a preset current value, an alarm signal is issued. Thus a simple circuit structure can be used for detecting over-temperature and over-current of thecable, and alarming and protecting for the cable; and occurrence of phenomenon of cable burning and load damaging at high temperature is effectively prevented, and the problem of load damaging existing in an existing control technology for cable protection due to heating of the cable or over-current and other reasons when transmitting the electric energy is solved.

Alarm circuit and device for cable protection

The invention discloses an equipment station with a fire extinguishing function. The station comprises plants and a dry powder output system. The dry powder output system comprises an air source device, a dry powder container, an air source pipe and an output pipe, wherein a first cut-off valve is further connected to the air source pipe in series; one end of the output pipe is connected with thedry powder container, and nozzles are arranged at the other end of the output pipe; the dry powder output system further comprises a third cut-off valve connected to the output pipe in series; the first cut-off valve and the third cut-off valve are correspondingly connected with driving mechanisms, wherein the driving mechanism is an electric mechanism or a pneumatic mechanism; the nozzles are multiple, and all the nozzles are connected with the output pipe through a section of flexible pipe; and the dry powder output system further comprises fixing devices, wherein the number of the fixing devices is equal to the number of the nozzles, each fixing device is provided with a mounting station used for mounting a nozzle, and each mounting station is provided with a nozzle. The equipment station can extinguish fire in the equipment station, and meanwhile has the characteristics that using cost is low, and the fire extinguishing reliability is easy to guarantee.

Equipment station with fire extinguishing function

The invention discloses a cable well intelligent fire monitoring system comprising a processor module, a temperature-sensitive detector, an alarm device, an automatic fire extinguishing device and a power supply module. The alarm frequency of the alerter can be controlled according to the temperature and the fire extinguishing device can be controlled to perform automatic fire extinguishing so that fire extinguishing in the early stage of fire is facilitated, extending of fire can be prevented and the affected loss can be reduced. The cable well intelligent fire monitoring system has the advantages of being simple, light and convenient, movable, flexible to install, efficient is inspection and alarm and automatic in fire extinguishing. The fire extinguishing mechanism is cutting off, blocking and absorbing the combustion chain so as to realize fire extinguishing. Coverage on the combustion heat value cable wire is performed so as to form the protection layer and prevent resume combustion.

Cable well intelligent fire monitoring system

The utility model discloses a cable shaft intelligence fire monitoring system, including processor module, thermal detector, alarm device, automatic fire extinguishing device and power module. The utility model discloses can be convenient for put out a fire at the initial stage of conflagration according to the alarm frequency and the control extinguishing device automatic fire extinguishing of temperature control alarm, fire hazard prevention's expansion in advance alleviates disaster -stricken loss. The utility model has the advantages of simple and direct, light, portable, installation flexibility and high efficiency are followed and are examined warning, automatic fire extinguishing. The mechanism of putting out a fire does: cut off, hinder eventually, inhale and lie prostrate the burning chain, realize putting out a fire. Implement to cover to the heat value cable conductor, form the protective layer, the prevention after combustion.

Cable shaft intelligence fire monitoring system

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Cable well intelligent fire monitoring system

Cable shaft intelligence fire monitoring system