Automatic spraying system for comprehensive fire preventing and extinguishing inhibitor in goaf

Abstract

The utility model discloses an automatic spraying system for a comprehensive fire preventing and extinguishing stopping agent in a goaf, which comprises a fully-mechanized coal mining support, a stopping pump system, a stopping agent pipeline system, a nitrogen injection pipeline system and a conveying pipe monitoring system, the stopping agent pump box and the stopping agent switch train are both arranged on a working face crossheading, the stopping agent pipeline system comprises a stopping agent main pipeline, a stopping agent hose branch and a stopping agent hose, and a liquid outlet of the stopping agent switch train is connected with the stopping agent main pipeline. On-line monitoring is conducted by combining fire prevention and extinguishing measures with a current conveying pipe monitoring system, powerful development of fire prevention and extinguishing work is facilitated, the automatic spraying system has the advantages of being more intelligent, more energy-saving, easy to operate, good in spraying effect, high in practicability and the like, and a guarantee defense line is added to mine safety production fire prevention and extinguishing work.

Description

Technical Field

[0001] The utility model relates to the field of mine fire prevention and extinguishing equipment, in particular to a comprehensive goaf fire prevention and extinguishing inhibitor automatic spraying system. Background Technique

[0002] Coal is the main energy source in China. At present, the fully mechanized top coal caving technology has been vigorously promoted and applied, which has greatly improved the production efficiency of coal mines. However, this method has a large caving height, a large amount of residual coal left in the goaf, and serious air leakage, resulting in frequent spontaneous combustion of coal in mines, which has become one of the main factors restricting the safe production and further development of mines.

[0003] Inhibitor fire prevention and extinguishing is a new technology for underground coal mine fire prevention and extinguishing that has been gradually promoted and widely applied in recent years. Spraying one or several medium solutions on the floating coal in the goaf at the prone-to-spontaneous combustion point can reduce the oxidation ability, prevent the oxidation process, and inhibit the spontaneous combustion of coal. Although this method has good fire prevention and extinguishing effects, the spraying method still stays at manual spraying. Its spraying equipment is cumbersome to move and operate, requires a lot of labor, and is time-consuming and laborious. It is easy to have phenomena such as less spraying, missing spraying, non-spraying, and uneven spraying. Therefore, the blank area where the inhibitor is not sprayed in place on the floating coal in the goaf becomes the source of spontaneous combustion of coal, leading to fire accidents in the working face, bringing a passive situation to the safety production management of mine fire prevention and extinguishing. If not handled in a timely and effective manner, it will cause casualties of miners due to carbon monoxide poisoning, bring immeasurable losses to the enterprise, and at the same time have a bad impact on society. Content of the Utility Model

[0004] The purpose of the utility model is to provide a comprehensive goaf fire prevention and extinguishing inhibitor automatic spraying system to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution:

[0006] A comprehensive goaf fire prevention and extinguishing inhibitor automatic spraying system includes fully mechanized supports. The spraying system includes an inhibitor pump system, an inhibitor pipeline system, a nitrogen injection pipeline system, and a pipeline monitoring system. The inhibitor pump system includes an inhibitor pump box and an inhibitor switch train. Both the inhibitor pump box and the inhibitor switch train are arranged on the working face crossheading of the mine. The inhibitor pipeline system includes an inhibitor main pipeline, inhibitor hose branches, and inhibitor hoses. The liquid outlet of the inhibitor switch train is connected to the inhibitor main pipeline, and one end of the inhibitor main pipeline is connected to the inhibitor hose branches;

[0007] There is a front scraper conveyor and a rear scraper conveyor under the fully mechanized support. The rear scraper conveyor is connected with a hydraulic cylinder. A hydraulic support valve group and a inhibitor operation valve are arranged on the fully mechanized support. An operation handle for controlling the telescopic movement of the hydraulic cylinder is arranged on the hydraulic support valve group. A limit switch is arranged on the hydraulic cylinder. The limit switch is electrically connected with a controller. One end of a branch of the inhibitor hose is connected with the controller. The controller is connected with the inhibitor hose. An electromagnetic valve for controlling the opening and closing of the inhibitor hose is arranged inside the controller.

[0008] One end of the inhibitor hose is provided with an inhibitor spray head. The inhibitor spray head is installed on the tail beam of the fully mechanized support. A hydraulic spray valve is arranged on the inhibitor hose. The hydraulic spray valve is connected with a high-pressure pipeline on the fully mechanized support.

[0009] On the basis of the above technical solutions, the present utility model further provides the following optional technical solutions:

[0010] In an optional solution: The nitrogen injection pipeline system includes a nitrogen injection pipeline and a nitrogen injection pipeline branch. An inhibitor fog cannon pipeline is arranged inside the nitrogen injection pipeline. The outside of the nitrogen injection pipeline is connected with the nitrogen injection pipeline branch. One end of the inhibitor main pipeline is connected with a hose. A connection valve is arranged on the nitrogen injection pipeline branch. The hose is connected with the nitrogen injection pipeline branch through the connection valve.

[0011] In an optional solution: One end of the inhibitor fog cannon pipeline penetrates out of the nitrogen injection pipeline and is connected with the inhibitor main pipeline. Fog cannon devices are arranged on both the inhibitor fog cannon pipeline and the nitrogen injection pipeline branch. The fog cannon device includes a spray head and an adjustment switch.

[0012] In an optional solution: The limit switch and the controller are electrically connected through a wire.

[0013] In an optional solution: A stop valve is arranged between the inhibitor fog cannon pipeline and the inhibitor main pipeline.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] The inhibitor automatic spraying system for comprehensive fire prevention and extinguishment in the goaf can perform automatic spraying in the goaf, providing a more scientific, reasonable, intelligent, energy-saving, good in use effect and strong in practicability fire prevention and extinguishment technology for the goaf. Through the fire prevention and extinguishment measures combined with the current pipeline monitoring system for online monitoring, it is beneficial to the effective development of the fire prevention and extinguishment work, solves the problems of cumbersome manual spraying operation, large investment in labor, time-consuming and laborious, and also effectively solves the actual problems such as less spraying, leakage spraying, non-spraying and uneven spraying on site when manually spraying the inhibitor, adding a safeguard line for the fire prevention and extinguishment work in the mine safety production. Description of the Drawings

[0016] Figure 1 It is a structural schematic diagram of an automatic spraying system for inhibitor for comprehensive fire prevention and extinguishment in goafs.

[0017] Figure 2 It is a structural schematic diagram of a fully mechanized mining support in the automatic spraying system for inhibitor for comprehensive fire prevention and extinguishment in goafs.

[0018] Figure 3 It is a structural schematic diagram of a nitrogen injection pipeline in the automatic spraying system for inhibitor for comprehensive fire prevention and extinguishment in goafs.

[0019] Annotation of reference numerals in the drawings: 1 - inhibitor pump box, 2 - inhibitor switch train, 3 - working face gate road, 4 - goaf, 5 - coal seam, 6 - fully mechanized mining support, 7 - front scraper conveyor, 8 - rear scraper conveyor, 9 - hydraulic cylinder, 10 - controller, 11 - hydraulic spray valve, 12 - inhibitor hose, 13 - inhibitor spray head, 14 - limit switch, 15 - wire, 16 - inhibitor hose branch, 17 - hydraulic support valve group, 18 - inhibitor operation valve, 19 - inhibitor main pipeline, 20 - nitrogen injection pipeline, 21 - nitrogen injection pipeline branch, 22 - regulating switch, 23 - hose, 24 - spray head, 25 - working face corner, 26 - inhibitor fog cannon pipeline, 27 - stop valve, 28 - connecting valve. Detailed implementation manners

[0020] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments; in the drawings or descriptions, similar or identical parts use the same reference numerals, and in actual applications, the shapes, thicknesses or heights of each component can be enlarged or reduced. Each embodiment listed in the present utility model is only used to illustrate the present utility model, and is not used to limit the scope of the present utility model. Any obvious modification or change made to the present utility model does not depart from the spirit and scope of the present utility model.

[0021] In one embodiment, as Figures 1-3 shown, an automatic spraying system for inhibitor for comprehensive fire prevention and extinguishment in goafs includes a fully mechanized mining support 6, the fully mechanized mining support 6 is arranged below the coal seam 5, and the goaf 4 after the working face is mined. The spraying system includes an inhibitor pump system, an inhibitor pipeline system, a nitrogen injection pipeline system and a pipeline monitoring system. The inhibitor pump system includes an inhibitor pump box 1 and an inhibitor switch train 2. The inhibitor pump box 1 and the inhibitor switch train 2 are both arranged on the working face gate road 3 of the mine. The inhibitor pipeline system includes an inhibitor main pipeline 19, an inhibitor hose branch 16 and an inhibitor hose 12. The liquid outlet of the inhibitor switch train 2 is connected with the inhibitor main pipeline 19, and one end of the inhibitor main pipeline 19 is connected with the inhibitor hose branch 16;

[0022] Below the fully-mechanized mining support 6, there are a front scraper conveyor 7 and a rear scraper conveyor 8. The scraper conveyors are scraper conveyors used for underground transportation. The rear scraper conveyor 8 is connected to a hydraulic cylinder 9. On the fully-mechanized mining support 6, there are a hydraulic support valve group 17 and an inhibitor operation valve 18. On the hydraulic support valve group 17, there is an operation handle for controlling the telescopic movement of the hydraulic cylinder 9. On the hydraulic cylinder 9, there is a limit switch 14. The limit switch 14 is electrically connected to a controller 10. One end of an inhibitor hose branch 16 is connected to the controller 10. The controller 10 is connected to an inhibitor hose 12. Inside the controller 10, there is an electromagnetic valve for controlling the opening and closing of the inhibitor hose 12. One end of the inhibitor hose 12 is provided with an inhibitor spray head 13. The inhibitor spray head 13 is installed on the tail beam of the fully-mechanized mining support 6;

[0023] When the hydraulic cylinder 9 finishes contracting inward, at this time the rear scraper conveyor 8 moves to the termination position, and the spatial position of the goaf 4 where the coal has been mined will be completely exposed. At this time, it is the best time and key node for inhibitor spraying for fire prevention and extinguishing. The limit switch 14 on the hydraulic cylinder 9 is turned on, and the electromagnetic valve inside the controller 10 automatically opens. The inhibitor spray head 13 installed on the support tail beam sprays inhibitor towards the goaf 4. Set the time according to the actual on-site situation, and the controller 10 will automatically close the electromagnetic valve and stop the inhibitor spraying task. Through each cycle of the key node for fire prevention and extinguishing (i.e., the hydraulic cylinder 9 finishes contracting), the inhibitor spraying work for fire prevention and extinguishing is completed cyclically, effectively liberating the labor force and various drawbacks brought by manual spraying. This setting is more intelligent, more energy-saving, simple to operate, and the spraying is uniform;

[0024] On the inhibitor hose 12, there is a hydraulic spray valve 11. The hydraulic spray valve 11 is connected to the high-pressure pipeline on the fully-mechanized mining support 6.

[0025] In one embodiment, as Figures 1-3 shown, the nitrogen injection pipeline system includes a nitrogen injection pipeline 20 and a nitrogen injection pipeline branch 21. Inside the nitrogen injection pipeline 20, there is an inhibitor fog cannon pipeline 26. The outside of the nitrogen injection pipeline 20 is connected to the nitrogen injection pipeline branch 21. One end of the inhibitor main pipeline 19 is connected to a hose 23. On the nitrogen injection pipeline branch 21, there is a connection valve 28. The hose 23 is connected to the nitrogen injection pipeline branch 21 through the connection valve 28. One end of the inhibitor fog cannon pipeline 26 passes through the nitrogen injection pipeline 20 and is connected to the inhibitor main pipeline 19. On both the inhibitor fog cannon pipeline 26 and the nitrogen injection pipeline branch 21, there are fog cannon devices. The fog cannon device includes a spray head 24 and an adjustment switch 22.

[0026] In one embodiment, as Figures 1-2 shown, the limit switch 14 and the controller 10 are electrically connected through a wire 15.

[0027] In one embodiment, as Figures 1-3 shown, a stop valve 27 is provided between the inhibitor fog cannon pipeline 26 and the main inhibitor pipeline 19.

[0028] In the above embodiment of the present utility model, an automatic spraying system for inhibitor for comprehensive fire prevention and extinguishment in a gob area is provided. The spraying system has three spraying methods. The first spraying method uses a hydraulic cylinder 9, a limit switch 14 and a controller 10 for cyclic automatic spraying. When the production process reaches the stage of retracting the rear scraper conveyor 8, the operator notifies the duty personnel at the inhibitor pump station to turn on the inhibitor pump through the remote communication system on the fully mechanized coal mining face, and then turns on the operating handles on the fully mechanized supports one by one to control the contraction of the hydraulic cylinder 9 and drive the rear scraper conveyor 8 to move. When the contraction of the hydraulic cylinder 9 is completed, it means that the rear scraper conveyor 8 has moved to the termination position, and the spatial position of the gob area 4 where the coal has been mined will be completely exposed. The solenoid valve of the controller 10 will automatically open, and the inhibitor high-pressure spray nozzles arranged on the support tail beam will spray inhibitor into the gob area 4 respectively. When the inhibitor is sprayed for the time set by the controller 10 according to the actual situation on site, the controller 10 automatically closes the solenoid valve and stops the inhibitor spraying task for this cycle.

[0029] The second spraying method is to use the hydraulic cylinder 9, the hydraulic spray valve 11 and the inhibitor pipeline system for mobile spraying. During the process of the hydraulic cylinder 9 driving the rear scraper conveyor 8 to move, the operator notifies the duty personnel at the inhibitor pump station to turn on the inhibitor pump through the remote communication system on the fully mechanized coal mining face, and then turns the inhibitor operation valve 18 one by one. The hydraulic spray valve 11 connected to the inhibitor hose 12 automatically opens the inhibitor spraying valve under the action of the hydraulic driving force in the high-pressure pipeline. At this time, the rear scraper conveyor 8 moves forward under the action of the hydraulic cylinder 9, and the high-pressure spray head (inhibitor spray nozzle 13) installed on the support tail beam will automatically start the inhibitor spraying and fire prevention task. The operator reversely turns the support handle (inhibitor operation valve 18), and the hydraulic spray valve 11 will close the valve through the hydraulic driving action and stop the inhibitor spraying work for this cycle.

[0030] The third spraying method is to use the inhibitor pump system and the nitrogen injection pipeline system to atomize and spray the inhibitor at the gob corner 25. Install the corresponding device in the outlet pipeline of the nitrogen injection system at the intake air gob corner of the working face, or it can also be installed in the sealed wall at the gob corner 25 of the working face. Then connect the inhibitor pipeline to the main nitrogen injection pipeline. Through the injection pressure of the rapid flow of nitrogen in the nitrogen injection pipeline 20, the atomization effect of the inhibitor is better, the flow and diffusion ability is stronger. At the same time, by using the driving force of nitrogen, the inhibitor mist can penetrate more evenly and effectively into the gob area 4. Under the action of gravity and electrostatic force, it descends and adheres to the floating coal to inertize the floating coal, so as to achieve the effect of preventing and extinguishing fire in the gob area, effectively reducing the floating of coal dust in the air, covering the residual coal, and achieving the characteristics of cooling, heat insulation and oxygen isolation; after nitrogen injection, the pressure difference between the gob area and the outside is reduced, and the oxygen content is reduced, thus improving the effect of preventing and extinguishing fire in the gob area of the working face.

[0031] As mentioned above, the above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. An automatic spraying system for comprehensive fire prevention and extinguishing agent in goaf, including a fully mechanized mining support, characterized in that: The spraying system includes a retardant pump system, a retardant pipeline system, a nitrogen injection pipeline system and a pipeline monitoring system. The retardant pump system includes a retardant pump box and a retardant switch train. The retardant pump box and the retardant switch train are both arranged on the working face drift of the mine. The retardant pipeline system includes a retardant main pipeline, a retardant hose branch and a retardant hose. The liquid outlet of the retardant switch train is connected to the retardant main pipeline, and one end of the retardant main pipeline is connected to the retardant hose branch. A front chute and a rear chute are arranged below the comprehensive mining support, the rear chute is connected to a hydraulic cylinder, a hydraulic support valve group and an inhibitor operating valve are arranged on the comprehensive mining support, an operating handle for controlling the extension and retraction of the hydraulic cylinder is arranged on the hydraulic support valve group, a limit switch is arranged on the hydraulic cylinder, the limit switch is electrically connected to a controller, one end of the inhibitor hose branch is connected to the controller, the controller is connected to an inhibitor hose, and a solenoid valve for controlling the switch of the inhibitor hose is arranged inside the controller; An inhibitor nozzle is arranged at one end of the inhibitor hose, and the inhibitor nozzle is installed on the tail beam of the comprehensive mining support. A hydraulic spray valve is arranged on the inhibitor hose, and the hydraulic spray valve is connected to the high-pressure pipeline on the comprehensive mining support.

2. The automatic spraying system for comprehensive fire prevention and extinguishing agent in goaf according to claim 1 is characterized in that: The nitrogen injection pipeline system includes a nitrogen injection pipeline and a nitrogen injection pipeline branch. An inhibitor fog cannon pipeline is arranged inside the nitrogen injection pipeline, and the nitrogen injection pipeline branch is connected to the outside of the nitrogen injection pipeline. A hose is connected to one end of the inhibitor main pipeline, and a connecting valve is arranged on the nitrogen injection pipeline branch. The hose is connected to the nitrogen injection pipeline branch through the connecting valve.

3. The automatic spraying system for comprehensive fire prevention and extinguishing agent in goaf according to claim 2 is characterized in that: One end of the inhibitor mist cannon pipeline passes through the nitrogen injection pipeline and is connected to the inhibitor main pipeline. The inhibitor mist cannon pipeline and the nitrogen injection pipeline branch are both provided with mist cannon devices, and the mist cannon devices include a nozzle and an adjustment switch.

4. The automatic spraying system for comprehensive fire prevention and extinguishing agent in goaf according to claim 1 is characterized in that: The limit switch is electrically connected to the controller via a wire.

5. The automatic spraying system for comprehensive fire prevention and extinguishing agent in goaf according to claim 3 is characterized in that: A stop valve is arranged between the inhibitor mist cannon pipeline and the inhibitor main pipeline.

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