CN115775434A - Fire monitoring and alarming device for transformer substation - Google Patents

Abstract

The invention relates to the technical field of fire monitoring and early warning, in particular to a fire monitoring and warning device for a transformer substation, which comprises a stand column, a control box, a first alarm and a second alarm, and is characterized by also comprising a smoke temperature monitoring unit for monitoring the concentration and the temperature of smoke in air and an image monitoring unit for monitoring whether a flame is generated in a monitoring area; the signal processing unit is used for receiving and processing signals of the smoke temperature monitoring unit and the image monitoring unit and is arranged in the control box; the fire extinguishing device can be automatically started after a fire alarm is obtained, so that the fire condition range is prevented from being enlarged due to untimely monitoring of personnel, the fire is extinguished in time, the damage to electrical equipment is reduced, and the loss in a transformer substation is reduced; meanwhile, the invention also transmits the alarm signal to the mobile phone terminal, so that the staff can timely learn the fire alarm and respond to the fire alarm.

Description

A fire monitoring and alarm device for substation

technical field

The invention relates to the technical field of fire monitoring and early warning, in particular to a fire monitoring and alarm device for a substation.

Background technique

The substation system is the core of the national power system and the carrier of power transmission. If a fire accident occurs in a substation, it will interrupt the transmission and use of regional power, cut off industrial and agricultural production, affect the normal life order, and bring huge social and economic losses. Compared with traditional buildings, substations have a unique architectural structure, a variety of power equipment, and a working environment of high voltage, high current, and high load. The factors that cause fire accidents in substations are also unique, which are reflected in: lightning strikes, poor contact of power lines, short-circuit leakage and arcing, electrical equipment failure, and human error. And because substations are mostly arranged in the outskirts, fires in substations are difficult to be discovered by the outside. When they are discovered, the fire situation has expanded and it is too late. Therefore, in order to cause unnecessary losses, improve the fire safety of substation sites, and minimize the risk of fire accidents in substation systems, it is necessary to develop and promote targeted fire monitoring and alarm systems in substation buildings.

The disadvantage of traditional technology is the temperature monitoring. The automatic fire alarm system generally installed in the existing substations only has the ability to monitor whether a fire has occurred and transmit it to the power supply center remotely, but cannot realize the fire alarm at the first time when a fire occurs. Fire extinguishing and self-rescue cannot realize the control of the fire at the first time. After the monitoring center finds out and controls the fire and extinguishes the fire, the fire has avoided serious consequences and often suffered heavy losses. In addition, the traditional technology mostly uses temperature probes for temperature detection, uses thermocouples or thermal resistances as detection elements, and obtains corresponding temperature values through a series of calculations such as coefficient compensation, so as to judge whether there is a problem in the substation room according to the temperature values. However, the parameters of this method are mostly fixed-point measurements, which can only determine the value of a certain device’s parameters, and it is difficult to accurately send out an alarm signal. The monitoring range is limited, and it is difficult to quickly and accurately identify areas where fires have occurred or are about to occur.

Contents of the invention

The invention overcomes the disadvantages of the prior art and provides a fire monitoring and alarm device for a substation.

The present invention is achieved through the following technical solutions: a fire monitoring and alarm device for a substation, including a column, a control box, an alarm 1 and an alarm 2, and is characterized in that it also includes a smoke concentration monitoring device for monitoring the smoke concentration in the air The smoke temperature monitoring unit for temperature and temperature, including the measuring box installed on the column, the measuring box is equipped with a conductive piece 1, the conductive piece 1 is installed on the side wall of the measuring box through a telescopic spring, and the end of the conductive piece 1 is equipped with a conductive piece 2 , the conductive sheet 1 and the conductive sheet 2 are set apart, the rear end of the conductive sheet 2 is provided with a temperature-sensitive metal sheet, and the temperature-sensitive metal sheet acts on the conductive sheet 2, the lower end of the measurement box is also provided with a smoke collection cover, and the lower end of the smoke collection There is a smoke sensor, and a rotating impeller is installed in the smoke collecting hood. The rotating impeller is installed on the rotating shaft, and the rotating shaft is installed on the bottom of the measuring box through the bearing seat. There is also a driving element in the measuring box, and the driving element is connected to the rotating shaft through the transmission structure;

An image monitoring unit for monitoring whether flames are generated in the monitoring area, including a camera, which is installed on the top of the column through a T-shaped frame;

The signal processing unit used to receive and process the signals of the smoke temperature monitoring unit and the image monitoring unit is set inside the control box, including the smoke concentration processing module and the image comparison module, the smoke sensor is connected to the smoke concentration processing module, and the signal output terminal of the camera is connected to the image The comparison module, the smoke concentration processing module and the image comparison module are all connected to the controller;

The fire extinguishing unit includes a gas storage bottle and a starting bottle. A sealing valve is provided at the outlet of the gas storage bottle. The sealing valve is connected to the main gas transmission line. A check valve is provided on the main gas transmission line. Wrench, the tail end of the main gas transmission pipeline is connected to several gas transmission sub-pipelines, each gas transmission sub-pipeline is provided with more than one air injection structure, the air injection structure includes a cross-shaped air injection pipe connected with the gas transmission sub-pipelines, each The air inlet end of the cross-shaped jet pipe is equipped with control valves, and the end of each jet pipe is provided with a nozzle; A piston barrel, the piston barrel is provided with a piston rod, the piston rod acts on the F-type wrench of the check valve, and the rear end of the piston rod is provided with a sealing ring.

Further, the signal output ends of the controller are respectively connected to the solenoid valve, the sealing valve, the alarm one and the remote server, and the remote server is connected to the mobile terminal through the wireless communication module.

Further, the conductive sheet 1 and the conductive sheet 2 are electrically connected to the alarm 2 through wires, and the signal output end of the alarm 2 is connected to the controller.

Further, the temperature-sensitive metal sheet is composed of two temperature-sensitive metal sheets with different coefficients of thermal expansion on the left and right.

Further, the fume collecting hood is trumpet-shaped, and the lower end of the fume collecting hood is provided with a filter.

Further, the transmission structure includes a driving wheel arranged at the output end of the driving element, a driven wheel connected with the rotating shaft, and the driving wheel and the driven shaft are connected through a transmission belt.

The beneficial effects of the present invention are: the present invention can automatically start the fire extinguishing device after obtaining the fire alarm, prevent the expansion of the fire range caused by untimely monitoring by personnel, timely extinguish the fire, reduce the damage to electrical equipment, and reduce the loss in the substation; and At the same time, the present invention also remotely transmits the alarm signal to the mobile phone terminal, so that the staff can learn about the fire alarm in time and respond in time.

The invention has wide measurement range and high precision, and can realize real-time monitoring of the whole indoor area of the substation.

The invention uses the change of the temperature-sensitive metal sheet to realize the contact of the two conductive sheets, and then triggers the alarm to send a signal to the controller, thereby realizing sensitive monitoring and timely response to the temperature signal.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic structural diagram of the smoke temperature monitoring unit of the present invention;

Fig. 3 is the structural representation of F type wrench of the present invention;

Fig. 4 is the schematic diagram of jet structure of the present invention;

In the accompanying drawings, 1 column, 2 control box, 3 alarm 1, 5 smoke temperature measuring unit, 51 measuring box, 52 conductive sheet 1, 53 conductive sheet 2, 54 telescopic spring, 55 temperature-sensitive metal sheet, 56 smoke collecting cover , 57 smoke sensors, 58 rotating impellers, 59 drive components; 6 cameras, 7 T-frames, 8 smoke concentration processing modules, 9 image contrast modules, 10 controllers, 11 gas cylinders, 12 sealing valves, 13 check valves, 1301 F-type wrench, 14 starter bottle, 15 solenoid valve, 16 jet structure, 1601 jet pipe, 1602 control valve, 1603 nozzle, 17 piston cylinder, 18 piston rod, 19 sealing ring.

Detailed ways

In order to make the objectives, technical solutions and beneficial effects of the present invention clearer, the technical solutions in the present invention will be further described below in conjunction with examples.

As shown in Figures 1 to 4, a fire monitoring and alarm device for a substation, including a column, a control box installed on the column, an alarm installed outside the substation and an alarm installed in the substation room Two, also include:

The smoke temperature monitoring unit used to monitor the smoke concentration and temperature in the air, including the measuring box installed on the column, the measuring box is equipped with a conductive piece 1, the conductive piece 1 is installed on the side wall of the measuring box through a telescopic spring, and the conductive piece 1 is installed on the side wall of the measuring box The tail end is provided with a conductive sheet 2, the conductive sheet 1 and the conductive sheet 2 are set apart, the rear end of the conductive sheet 2 is provided with a temperature-sensitive metal sheet, and the temperature-sensitive metal sheet acts on the conductive sheet 2, and the lower end of the measuring box is also equipped with a smoke collector. There is a smoke sensor at the lower end of the smoke collecting hood, and a rotating impeller is installed inside the smoke collecting hood. The rotating impeller is installed on the rotating shaft, and the rotating shaft is installed on the bottom of the measuring box through the bearing seat. The structure connects the rotating shaft.

An image monitoring unit for monitoring whether flames are generated in the monitoring area, including a camera, which is installed on the top of the column through a T-shaped frame;

The signal processing unit used to receive and process the signals of the smoke temperature monitoring unit and the image monitoring unit is set inside the control box, including the smoke concentration processing module and the image comparison module, the smoke sensor is connected to the smoke concentration processing module, and the signal output terminal of the camera is connected to the image The comparison module, the smoke concentration processing module and the image comparison module are all connected to the controller;

The fire extinguishing unit includes a gas storage bottle and a starting bottle. A sealing valve is provided at the outlet of the gas storage bottle. The sealing valve is connected to the main gas transmission line. A check valve is provided on the main gas transmission line. Wrench, the tail end of the main gas transmission pipeline is connected to several gas transmission sub-pipelines, each gas transmission sub-pipeline is provided with more than one air injection structure, the air injection structure includes a cross-shaped air injection pipe connected with the gas transmission sub-pipelines, each The air inlet end of the cross-shaped jet pipe is equipped with control valves, and the end of each jet pipe is provided with a nozzle; A piston cylinder, a piston rod is arranged in the piston cylinder, the piston rod acts on the F-type wrench of the check valve, and the rear end of the piston rod is provided with a sealing ring to prevent gas leakage.

Further, the signal output ends of the controller are respectively connected to the solenoid valve, the sealing valve, the alarm one and the remote server, and the remote server is connected to the mobile terminal through the wireless communication module.

Further, the conductive sheet 1 and the conductive sheet 2 are electrically connected to the alarm 2 through wires, and the signal output end of the alarm 2 is connected to the controller through the signal processing unit.

Further, the temperature-sensing metal sheet is composed of two temperature-sensing metal sheets with different thermal expansion coefficients on the left and right, wherein the thermal expansion coefficient on the left side is smaller than that on the right side.

Further, the transmission structure includes a driving wheel arranged at the output end of the driving element, a driven wheel connected with the rotating shaft, and the driving wheel and the driven shaft are connected through a transmission belt.

In the state of commissioning, if a fire occurs in the substation room, that is, a flame is found anywhere in the substation room, the camera transmits the image signal to the controller after being processed by the image comparison module, and the controller sends the image to the server for storage; the image The comparison module uses the inter-frame difference method to process the images collected by the camera, that is, the camera obtains a dynamic image by taking countless static images and connecting each frame to obtain a dynamic image, and obtains a difference image by comparing two adjacent frames of static images. Select an appropriate threshold for image binarization to obtain a binarized image, obtain the contour information of flame and smoke at a certain moment by extracting the image through binarization, and transmit the contour information of flame and smoke to the controller, and then judge the No fire occurred.

The flame emits smoke, which is sucked into the smoke hood by the influence of the rotating impeller, and the filter screen filters out some ash or impurities, and the smoke sensor sends the detected smoke signal to the controller, and the controller judges the fire according to the image signal and smoke signal In addition, as the fire expands, more and more smoke gathers in the smoke collection hood, and is discharged through the temperature measurement channel of the measurement box, and the shape of the temperature-sensing metal sheet changes, and the temperature-sensing metal sheet The end of the two parts is bent to the left, and the second conductive sheet is pushed to contact the first conductive sheet. At this moment, the first alarm signal is sent out to remind external personnel not to approach, so as to avoid personal injury.

After the alarm 2 is triggered, the controller sends an instruction according to the signal to open the solenoid valve, the gas in the starting bottle is transported through the starting pipeline, and after reaching the end, the starting gas pushes the piston rod to move, and the piston rod pushes the lock lever wrench to lift up, and the check valve No longer restricted, the F-type wrench is lifted. After lifting for 1 second, the controller controls the sealing valve to open. At this time, the gas in the gas storage cylinder passes through the main gas transmission pipeline to the gas transmission sub-pipeline, and the gas transmission sub-pipeline is transported to the paint spray pipe. , the gas is sprayed out through the nozzle on the jet pipe to extinguish the fire.

In order to realize positioning fire extinguishing, each corresponding jet pipe is provided with a control valve, and the controller determines the area where the fire occurs according to the image captured by the camera, and then controls the control valve on the corresponding jet pipe in the area to open to extinguish the fire.

Except for the technical features described in the description, the rest of the technical features are known to those skilled in the art.

Claims (6)

1. A fire monitoring and alarm device for a substation, comprising a column, a control box, an alarm one and an alarm two, is characterized in that, also includes a smoke temperature monitoring unit for monitoring smoke concentration and temperature in the air, Including the measurement box installed on the column, the measurement box is equipped with a conductive piece 1, the conductive piece 1 is installed on the side wall of the measurement box through a telescopic spring, the tail end of the conductive piece 1 is provided with a conductive piece 2, a conductive piece 1 and a conductive piece 2 Set apart, the rear end of the conductive sheet 2 is provided with a temperature-sensitive metal sheet, and the temperature-sensitive metal sheet acts on the conductive sheet 2. The lower end of the measurement box is also provided with a smoke collection hood, and the lower end of the smoke collection hood is provided with a smoke sensor. There is a rotating impeller, the rotating impeller is installed on the rotating shaft, and the rotating shaft is installed on the bottom of the measuring box through the bearing seat. There is also a driving element in the measuring box, and the driving element is connected to the rotating shaft through the transmission structure; An image monitoring unit for monitoring whether flames are generated in the monitoring area, including a camera, which is installed on the top of the column through a T-shaped frame; The signal processing unit used to receive and process the signals of the smoke temperature monitoring unit and the image monitoring unit is set inside the control box, including the smoke concentration processing module and the image comparison module, the smoke sensor is connected to the smoke concentration processing module, and the signal output terminal of the camera is connected to the image The comparison module, the smoke concentration processing module and the image comparison module are all connected to the controller; The fire extinguishing unit includes a gas storage bottle and a starting bottle. A sealing valve is provided at the outlet of the gas storage bottle. The sealing valve is connected to the main gas transmission line. A check valve is provided on the main gas transmission line. Wrench, the tail end of the main gas transmission pipeline is connected to several gas transmission sub-pipelines, each gas transmission sub-pipeline is provided with more than one air injection structure, the air injection structure includes a cross-shaped air injection pipe connected with the gas transmission sub-pipelines, each The air inlet end of the cross-shaped jet pipe is equipped with control valves, and the end of each jet pipe is provided with a nozzle; A piston barrel, the piston barrel is provided with a piston rod, the piston rod acts on the F-type wrench of the check valve, and the rear end of the piston rod is provided with a sealing ring. 2. A kind of fire monitoring and alarm device for substation according to claim 1, is characterized in that, the signal output end of described controller is respectively connected solenoid valve, sealing valve, alarm one and remote server, and remote server The mobile terminal is connected to the mobile phone through the wireless communication module. 3. A kind of fire monitoring and alarm device for substation according to claim 1, characterized in that, said conductive sheet one and conductive sheet two are electrically connected to alarm two by wires, and the signal output terminals of alarm two are connected controller. 4. A fire monitoring and alarm device for a substation according to claim 1, wherein the temperature-sensing metal sheet is composed of left and right temperature-sensing metal sheets with different thermal expansion coefficients. 5. A fire monitoring and alarm device for a substation according to claim 1, characterized in that the fume collecting hood is trumpet-shaped, and the lower end of the fume collecting hood is provided with a filter. 6. A fire monitoring and alarm device for a substation according to claim 1, wherein the transmission structure includes a driving wheel arranged at the output end of the driving element, a driven wheel connected to the rotating shaft, and the driving wheel and the driven shaft are connected by a drive belt.

Images