Fire-fighting spraying system of blast furnace feeding belt conveyor

Abstract

The utility model relates to a fire-fighting spraying system of a blast furnace feeding belt conveyor, and belongs to the technical field of blast furnace production. Comprising a fire-fighting main pipe, the fire-fighting main pipe stretches across a feeding belt conveyor, a plurality of spraying units are arranged on the fire-fighting main pipe, and the spraying units are evenly arranged at intervals in the conveying direction of the feeding belt conveyor; an electric valve is arranged on the fire-fighting main pipe, an infrared temperature measurement camera is arranged on the feeding belt conveyor, the electric valve and the infrared temperature measurement camera are in signal connection with the PLC, the infrared temperature measurement camera monitors the temperature of the feeding belt conveyor and feeds back a monitoring result to the PLC, and the PLC controls the electric valve to be opened or closed. And the spraying unit sprays water or stops water supply to the feeding belt conveyor. According to the fire extinguishing device, fire disasters happening to the feeding belt conveyor can be extinguished at the first time, fire fighting water can be evenly sprayed to the feeding belt conveyor, multiple workers are prevented from entering a dangerous site, and the safety risk of operators is reduced.

Description

Technical Field

[0001] The utility model relates to a fire sprinkler system for a charging belt conveyor of a blast furnace, belonging to the technical field of blast furnace production. Background Art

[0002] The charging belt conveyor between the blast furnace bunker and the furnace top transports the stored ore and coke materials to the furnace top for the redox reaction of molten iron. Under normal circumstances, the charging belt conveyor operates stably. However, due to reasons such as high temperature and short circuit of the circuit, the charging belt conveyor may catch fire. If not extinguished and controlled in time, the fire will spread rapidly, not only causing poisoning of the operators in this area, but also highly likely to trigger major accidents such as gas explosion and pulverized coal explosion for the blast furnace filled with carbon monoxide and pulverized coal. The traditional fire extinguishing measure is that the repair personnel first find the fire hose, then assemble the sprinkler head and the fire hose, and then turn on the sprinkler head water pump to extinguish the fire. Such a treatment method cannot extinguish the fire in the first time, missing the opportunity to extinguish the fire. Secondly, it requires the cooperation of multiple repair personnel, which is time-consuming and laborious, and further increases the safety risk of the personnel. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a fire sprinkler system for a charging belt conveyor of a blast furnace aiming at the above-mentioned prior art, which can extinguish the fire occurring on the charging belt conveyor in the first time, the fire water can be evenly sprayed on the charging belt conveyor, avoiding multiple people entering the dangerous site and reducing the safety risk of the operators.

[0004] The technical solution adopted by the utility model to solve the above problems is: a fire sprinkler system for a charging belt conveyor of a blast furnace, including a fire main pipe, the fire main pipe straddles the charging belt conveyor, and a number of sprinkler units are arranged on the fire main pipe, and the number of the sprinkler units are evenly spaced along the conveying direction of the charging belt conveyor; an electric valve is arranged on the fire main pipe, an infrared temperature measuring camera is arranged on the charging belt conveyor, the electric valve and the infrared temperature measuring camera are respectively connected with a PLC controller in signal, the infrared temperature measuring camera monitors the temperature of the charging belt conveyor and feeds back the monitoring result to the PLC controller, and the PLC controller controls the opening or closing of the electric valve, so that the sprinkler unit sprays water or stops water on the charging belt conveyor.

[0005] Each sprinkler unit respectively includes a fire branch pipe, and a number of sprinkler heads evenly spaced are arranged on the fire branch pipe, and the sprinkler heads face the charging belt conveyor and have different spraying angles.

[0006] An electrical control box is also provided, and a number of display lights are arranged on the electrical control box: a fault indicator light, a power indicator light, an open-in-place indicator light, a close-in-place indicator light, an open-valve indicator light, a close-valve indicator light, and a manual-automatic switching indicator light, which are used to display the current state of the electric valve.

[0007] There are also multiple buttons on the electrical control box: a manual / automatic switching button, a manual valve opening button, and a manual valve closing button, which realize two control modes of automatic and manual control for the electric valve.

[0008] A fire protection bypass pipe is connected to the fire protection main pipe, and a bypass manual valve is provided on the fire protection bypass pipe.

[0009] Compared with the prior art, the advantages of the present utility model are as follows: a fire sprinkler system for a blast furnace charging belt conveyor

[0010] 1. Automatic fire sprinkling for the charging belt conveyor is realized: an electrical control box is newly added in the belt corridor, and the control main circuit of the electric valve is arranged in the electrical control box. When the electrical control box is in the automatic control state, once a fire occurs on the charging belt conveyor, the sprinkler system can be immediately activated to extinguish the fire in the first time; the electrical control box can also be in the manual control state, and when the operator discovers a fire on site, the sprinkler system can be manually opened to extinguish the fire.

[0011] 2. Multiple sprinkler heads facing the charging belt conveyor are evenly distributed on the fire protection branch pipes. Compared with the traditional method of manually assembling fire hoses by emergency repair personnel, it saves the emergency time for fire spraying, can evenly spray the fire protection water on the charging belt conveyor, and also avoids multiple people entering the dangerous site. While improving the overall efficiency, it also reduces the safety risks of the operators.

[0012] 3. If the electric valve fails or loses power, in case of an emergency such as a fire on the charging belt conveyor, the start and stop of the sprinkler system can be realized through the bypass manual valve. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of a fire sprinkler system for a blast furnace charging belt conveyor according to an embodiment of the present utility model;

[0014] Figure 2 It is a schematic diagram of the electrical control box;

[0015] In the figure, 1 is the fire protection main pipe, 2 is the electric valve, 3 is the fire protection bypass pipe, 4 is the bypass manual valve, 5 is the fire protection branch pipe, 6 is the sprinkler head, 7 and 8 are the charging belt conveyors, 9 is the electrical control box, 10 is the power indicator light, 11 is the fault indicator light, 12 is the open-in-place indicator light, 13 is the closed-in-place indicator light, 14 is the valve-opening indicator light, 15 is the valve-closing indicator light, 16 is the manual / automatic switching button, 17 is the manual / automatic switching indicator light, 18 is the manual valve-opening button, and 19 is the manual valve-closing button. Detailed Embodiment

[0016] The following further describes the present utility model in detail with reference to the embodiments of the drawings.

[0017] AsFigure 1 As shown in the figure, a fire sprinkler system for a blast furnace charging belt conveyor in this embodiment includes a fire main pipe that spans across the charging belt conveyor. The fire main pipe is connected to a number of fire branch pipes, and the several fire branch pipes are evenly spaced along the conveying direction of the charging belt conveyor. Each fire branch pipe is provided with 3 sprinkler heads that are evenly spaced, and the spraying directions of the sprinkler heads are respectively towards the charging belt conveyor and have different spraying angles. An electric valve is provided on the fire main pipe, and the electric valve is signal-connected to a PLC controller. An infrared temperature measuring camera is provided on the charging belt conveyor, and the infrared temperature measuring camera is signal-connected to the PLC controller. When the infrared temperature measuring camera monitors that the temperature on the charging belt conveyor exceeds the set temperature, the PLC controller controls the electric valve to open, so that the fire main pipe is conducted, and the sprinkler heads on the sprinkler branch pipes spray water on the charging belt conveyor from multiple angles.

[0018] As Figure 2 shown in the figure, an electrical control box is provided in the belt gallery. The electrical control box is provided with a number of display lights: a fault indicator light, a power indicator light, an open-in-place indicator light, a close-in-place indicator light, an open-valve indicator light, a close-valve indicator light, and a manual-automatic switch indicator light, which are used to display the current state of the electric valve. The electrical control box is also provided with a number of buttons: a manual-automatic switch button, a manual open-valve button, and a manual close-valve button, realizing two control modes of automatic and manual for the electric valve.

[0019] A fire bypass pipe is connected to the fire main pipe, and a bypass manual valve is provided on the fire bypass pipe. When the electric valve fails, the bypass manual valve is manually opened, so that the fire water is diverted to the fire branch pipes through the fire bypass pipe.

[0020] When the operator operates the manual-automatic switching button and the manual-automatic button indicator light is on, the spraying system is in the automatic state. At this time, once a fire breaks out on the feeding belt conveyor, the signal temperature obtained by the infrared temperature measuring camera above will increase. Once the temperature exceeds 200 °C, the PLC controller controls the electric valve to open, and the valve opening indicator light is on, and water spraying for cooling starts. After the electric valve is fully opened, the fully opened indicator light will be on and the valve opening indicator light will go out; when the temperature is lower than 150 °C, the PLC controller controls the electric valve to close, and the valve closing indicator light is on, and the water spraying stops. After the electric valve is fully closed, the fully closed indicator light will be on and the valve closing indicator light will go out. When the manual-automatic button indicator light on the electrical control box is off, the spraying system is in the manual state. At this time, once the operator discovers that the feeding belt conveyor is on fire, the operator can operate the manual valve opening button on the corresponding spraying system electrical control cabinet, and the valve opening indicator light is on, and water spraying for cooling starts. After the electric valve is fully opened, the fully opened indicator light will be on and the valve opening indicator light will go out. After the fire is extinguished, the operator operates the manual valve closing button on the electrical control box, and the valve closing indicator light is on, and the water spraying stops. After the valve is fully closed, the fully closed indicator light will be on and the valve closing indicator light will go out. If the fault indicator light is on, the electric valve is in the fault state at this time. In an emergency, the operator can open the bypass manual valve to make the sprinkler head spray water or stop spraying water. If the power indicator light is on, the key parts such as the switch should be comprehensively checked, and after ensuring safety, the power can be supplied again. In case of an emergency, it is agreed to manually open the bypass manual valve to spray water or stop spraying water.

[0021] This application can extinguish the fire in the first time, and the fire-fighting water can be evenly sprayed on the feeding belt conveyor, avoiding multiple people entering the dangerous site and reducing the safety risks of the operators.

[0022] In addition to the above embodiments, the present utility model also includes other implementation manners. Any technical solutions formed by equivalent transformation or equivalent substitution shall fall within the protection scope of the claims of the present utility model.

Claims

1. A fire sprinkler system for a blast furnace feeding belt conveyor, characterized in that: It includes a fire main pipe, which spans across the feeding belt conveyor. A plurality of spray units are arranged on the fire main pipe, and the plurality of spray units are evenly spaced along the conveying direction of the feeding belt conveyor; an electric valve is provided on the fire main pipe, and an infrared temperature measuring camera is provided on the feeding belt conveyor. The electric valve and the infrared temperature measuring camera are respectively connected to the PLC controller signal. The infrared temperature measuring camera monitors the temperature of the feeding belt conveyor and feeds back the monitoring result to the PLC controller. The PLC controller controls the electric valve to open or close, so that the spray unit sprays water or stops water on the feeding belt conveyor.

2. A blast furnace feeding belt conveyor fire sprinkler system according to claim 1, characterized in that: The spray units respectively include fire branch pipes, on which a plurality of spray heads arranged evenly spaced apart are provided, and the spray heads face the feeding belt conveyor and have different spray angles.

3. A blast furnace feeding belt conveyor fire sprinkler system according to claim 1, characterized in that: An electrical control box is also provided, on which a plurality of display lights are arranged: a fault indicator light, a power indicator light, an open position indicator light, a closed position indicator light, a valve opening indicator light, a valve closing indicator light, and a manual-automatic switching indicator light, which are used to display the current status of the electric valve.

4. A blast furnace feeding belt conveyor fire sprinkler system according to claim 3, characterized in that: The electrical control box is also provided with a plurality of buttons: a manual-automatic switching button, a manual valve opening button, and a manual valve closing button, so as to realize automatic and manual control modes of the electric valve.

5. A blast furnace feeding belt conveyor fire sprinkler system according to claim 1, characterized in that: The fire main pipe is connected to a fire bypass pipe, and the fire bypass pipe is provided with a bypass manual valve.

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