Intelligent spraying system of three-zone inhibitor for goaf of mine

Abstract

The application discloses a kind of intelligent spraying systems of mine goaf three-zone resistance agent, including monitoring unit, control unit, spraying pipeline and resistance agent preparation device;Monitoring unit includes three respectively arranged in asphyxia zone, oxidation zone and heat dissipation zone's beam tube monitoring device;Resistance agent preparation device is provided with at least two preparation cavities, each preparation cavity is provided with stirrer and discharge port;Spraying pipeline includes main pipe, with preparation cavity one-to-one corresponding feed pipe and three feed pipes, feed pipe one end with corresponding preparation cavity discharge port communication, the other end is all with the one end of main pipe communication, each feed pipe one end with the other end of main pipe communication;Three feed pipes the other end is respectively into goaf three-zone and is all installed with spray head;Control unit includes industrial computer and PLC programmable controller;Each feed pipe and each feed pipe are all provided with solenoid valve.The application realizes the intelligent spraying of goaf three-zone resistance agent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spontaneous combustion disaster prevention in coal mine underground, in particular to a kind of intelligent spraying system of three-zone inhibitor in goaf of mine. BACKGROUND

[0002] According to statistics, the fire caused by coal spontaneous combustion accounts for 90% to 94% of the total number of mine fires, and 56% of state-owned key coal mines are easy to spontaneously combust, so mine fire has been one of the main factors restricting mine safety production. Spraying inhibitor in mine coal mining face and goaf and other places prone to coal spontaneous combustion has been one of the common means to prevent mine fire.

[0003] However, in the actual production activities of the mine, the traditional inhibitor spraying device cannot intelligently switch the type of inhibitor according to the actual situation of the mine, causing a certain degree of waste of resources, and most importantly, it is difficult to achieve the expected prevention and control effect. Another major drawback of the traditional inhibitor spraying method is that it cannot intelligently spray other types of inhibitors when the corresponding inhibitor is used up according to the actual situation of the mine, which may lead to the best fire prevention opportunity, causing huge safety hazards and a certain degree of loss. SUMMARY

[0004] The purpose of the present application is to provide an intelligent spraying system of three-zone inhibitor in goaf of mine to solve the problems existing in the prior art and realize intelligent spraying of three-zone inhibitor in goaf.

[0005] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0006] The present application provides an intelligent spraying system of three-zone inhibitor in goaf of mine, comprising a monitoring unit, a control unit, a spraying pipeline and an inhibitor preparation device.

[0007] The monitoring unit comprises three beam tube monitoring devices arranged in the smothering zone, the oxidation zone and the heat dissipation zone respectively, and the beam tube monitoring devices are used to monitor the actual temperature value and the concentration value of the index gas; the inhibitor preparation device is provided with at least two preparation cavities, each of which is provided with a stirrer and a discharge port;

[0008] The spraying pipeline comprises a main pipe, a feed pipe corresponding to each preparation cavity and three feed pipes, one end of the feed pipe is communicated with the discharge port of the corresponding preparation cavity, and the other end is communicated with one end of the main pipe, and each feed pipe is communicated with the other end of the main pipe; the other end of the three feed pipes is respectively communicated with the three zones of the goaf and is provided with a spray head.

[0009] The control unit comprises an industrial computer and a PLC programmable controller connected with the industrial computer, and the beam tube monitoring device is connected with the industrial computer through a signal adapter; an electromagnetic valve connected with the PLC programmable controller is arranged on each of the feeding pipes and the material conveying pipes.

[0010] Preferably, the spray heads arranged on the material conveying pipes in the oxidation zone and the suffocation zone are high-pressure spray heads, and the spray heads arranged on the material conveying pipes in the heat dissipation zone are self-rotating injectors.

[0011] Preferably, the number of the preparation cavities is three; an infrared detector is arranged on the top of each of the preparation cavities, and an infrared receiving device is arranged on the top of the stirrer, the infrared receiving device is used for receiving infrared rays emitted by the infrared detector, and the infrared receiving device and the infrared detector are connected with the PLC programmable controller; the infrared receiving device is lower than the infrared detector and can be submerged in the material in the preparation cavity.

[0012] Preferably, a water pressure sensing device for detecting the hydraulic pressure is arranged in the preparation cavity, and the water pressure sensing device is connected with the PLC programmable controller.

[0013] Preferably, a water pump for pumping the material in the preparation cavity is further arranged in the preparation cavity, and the water pump is connected with the PLC programmable controller.

[0014] Preferably, each of the preparation cavities is connected with a sub-inlet water pipe, each of the sub-inlet water pipes is connected with one end of a total-inlet water pipe, the other end of the total-inlet water pipe is connected with a water outlet of a water tower, and an electromagnetic valve connected with the PLC programmable controller is arranged on each of the sub-inlet water pipes.

[0015] The present application has the following technical effects compared with the prior art:

[0016] The mine goaf three-zone inhibitor intelligent spraying system realizes intelligent spraying of the three-zone inhibitor in the goaf. The infrared detector can detect the concentration of the solution in the preparation cavity, when the concentration of the solution in the preparation cavity changes, the propagation path of the infrared light will also deviate, and the infrared light received by the infrared receiving device will also deviate, so the size of the deviation of the infrared light can be used to judge the concentration of the solution in the preparation cavity, so that the opening state of the stirrer can be adaptively adjusted; the water pressure value fed back by the water pressure sensing device installed in the preparation cavity can automatically store water in the preparation cavity. The inhibitor preparation device in the present application can realize automatic preparation of the inhibitor solution, which greatly saves the labor intensity of the mine workers.

[0017] The present application realizes real-time dynamic monitoring of the goaf of the mine through the beam tube monitoring device, actual information monitored is fed back to the signal adapter plate, the signal adapter plate converts the signal, the industrial computer judges according to the pre-set temperature index and gas index after receiving the data, and issues an instruction to the PLC programmable controller in the case of reaching the predetermined index, the PLC programmable controller controls the output of the retardant solution, so as to achieve the expected goal of preventing mine fire.

[0018] Compared with the existing retardant spraying technology, the present application has a certain degree of intelligence, different types of retardants can be sprayed according to the actual situation of the goaf of the mine, the goaf of the mine is prevented from coal spontaneous combustion more efficiently and intelligently, and the retardant resources are also saved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0020] Fig. 1 It is a structural schematic diagram of the goaf three-zone retardant intelligent spraying system of the present application;

[0021] Fig. 2 It is a partial structural schematic diagram of the goaf three-zone retardant intelligent spraying system of the present application;

[0022] Among them: 100, the goaf three-zone retardant intelligent spraying system; 1, the beam tube monitoring device; 2, the signal adapter plate; 3, the industrial computer; 4, the retardant preparation device; 5, the PLC programmable controller; 6, the preparation cavity; 7, the stirrer; 8, the water pump; 9, the infrared detector; 10, the water pressure sensing device; 11, the water tower; 12, the total water inlet pipe; 13, the sub-water inlet pipe; 14, the feed pipe; 15, the main pipe; 16, the feed pipe; 17, the electromagnetic valve; 18, the self-rotating injector; 19, the spray head; 20, the flange. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present application.

[0024] The purpose of this invention is to provide an intelligent spraying system for three-zone inhibitors in mine goaf areas, in order to solve the problems existing in the prior art and realize the intelligent spraying of three-zone inhibitors in goaf areas.

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figs. 1-2 As shown: This embodiment provides a smart spraying system 100 for three-zone inhibitors in a mine goaf, including a monitoring unit, a control unit, a spraying pipeline, and an inhibitor preparation device 4.

[0027] The mine goaf is divided into three zones: the asphyxiation zone, the oxidation zone, and the heat dissipation zone. The monitoring unit includes three bundled tube monitoring devices 1, each installed in one of these zones. These devices monitor the actual temperature and the concentration of indicator gases. The bundled tube monitoring devices 1 are existing, mature products and will not be described in detail here. The control unit includes an industrial computer 3 and a PLC programmable controller 5 connected to the industrial computer 3. The bundled tube monitoring devices 1 are connected to the industrial computer 3 via a signal adapter board 2.

[0028] The inhibitor preparation device 4 has three preparation chambers 6, each equipped with a stirrer 7 and a discharge port. Each preparation chamber 6 has an infrared detector 9 at its top, and an infrared receiver at its top. The infrared receiver receives infrared radiation emitted by the infrared detector 9. Both the infrared receiver and the infrared detector 9 are connected to a PLC programmable controller 5. The infrared receiver is positioned below the infrared detector 9 and can be submerged by the material in the preparation chamber 6. Each preparation chamber 6 is connected to a sub-inlet pipe 13, which is connected to one end of a main inlet pipe 12. The other end of the main inlet pipe 12 is connected to the outlet of the water tower 11. Each sub-inlet pipe 13 is equipped with a solenoid valve 17 connected to the PLC programmable controller 5.

[0029] The spraying pipeline includes a main pipe 15, a feed pipe 14 corresponding to the preparation chamber 6, and three conveying pipes 16. One end of the feed pipe 14 is connected to the outlet of the corresponding preparation chamber 6, and the other end is connected to one end of the main pipe 15. The preparation chamber 6 is also equipped with a water pump 8 for pumping out the material in the inhibitor preparation device 4. The water pump 8 is electrically connected to the PLC programmable controller 5.

[0030] Each of the material delivery pipes 16 is in communication with the other end of the main pipe 15; the other end of each of the three material delivery pipes 16 is connected to the three zones of the goaf and is provided with a spray head; the spray heads provided on the material delivery pipes 16 in the oxidation zone and the suffocation zone are high-pressure spray heads, and the spray head provided on the material delivery pipe 16 in the heat dissipation zone is a self-rotating injector 18, the self-rotating injector 18 is provided with a spray head 19, and the self-rotating injector 18 is connected to the material delivery pipe 16 through a flange 20. The electromagnetic valve 17 connected to the PLC programmable controller 5 in signal is provided on each of the material delivery pipes 16 and each of the material delivery pipes 14.

[0031] The preparation cavity 6 is provided with a water pressure sensing device 10 for detecting the hydraulic pressure, and the water pressure sensing device 10 is connected to the PLC programmable controller 5 in signal.

[0032] The specific working principle of the goaf three-zone inhibitor intelligent spraying system 100 of the mine in the embodiment is as follows:

[0033] The preparation cavity 6 of the inhibitor preparation device 4 is filled with water and raw materials, and then the inhibitor solution is prepared by automatically stirring the water and the raw materials by opening the stirrer 7. It should be noted that the infrared receiving device at the top of the stirrer 7 is fixed and does not move. When the infrared light emitted by the infrared detector 9 passes through the inhibitor solution above the infrared receiving device, the infrared light is refracted due to the different concentrations of the inhibitor solution. The infrared receiving device will feed back the refraction angle of the infrared light beam to the central control system. When the deflection angle of the infrared light refraction is greater than 8°, the stirrer 7 will automatically be in an open state. Specifically, the specific model of the infrared receiving device in the embodiment is Yiguang Infrared Receiver Head IRM-56384, which has a circular lens. When the concentration of the inhibitor solution is relatively large, the refraction angle of the infrared light will be large, and when the deflection angle of the infrared light refraction is greater than 8°, the infrared light emitted by the infrared detector 9 cannot enter the circular lens due to refraction, thereby causing the infrared receiving device to be unable to receive the infrared signal and feeding back the signal to the PLC programmable controller 5. At this time, the PLC programmable controller 5 will automatically open the stirrer 7 to stir the inhibitor solution. After the inhibitor solution is stirred, it will be uniformly mixed, so that the deflection angle of the infrared light refraction is less than 8°. At this time, the infrared receiving device can receive the infrared signal and feed back the signal to the PLC programmable controller 5. At this time, the PLC programmable controller 5 will automatically close the stirrer 7, and at this time, the PLC programmable controller 5 will issue a material shortage alarm signal through a buzzer or a flash lamp to notify the staff to add solid inhibitor raw materials.

[0034] The water pressure sensing device 10 can sense the water pressure in the preparation chamber 6 in real time. When the water pressure in the preparation chamber 6 is less than the set value, the PLC programmable controller 5 automatically opens the solenoid valve 17 on the corresponding sub-inlet pipe 13 to automatically replenish water. When the water pressure in the preparation chamber 6 is greater than the set value, the PLC programmable controller 5 automatically closes the solenoid valve 17 on the corresponding sub-inlet pipe 13 to stop water storage.

[0035] The bundled tube monitoring device 1, installed in the third zone of the goaf, transmits the concentration values ​​of the indicator gases and the actual temperature values ​​of the third zone to the signal converter board 2. The signal converter board 2 converts the transmitted information into electrical signals and transmits them to the industrial control computer 3 in the form of data. After receiving the data, the industrial control computer 3 performs intelligent analysis and comparison. When the received data exceeds the set standard value, the integrated control center will issue a work instruction to the PLC programmable controller 5 installed on the inhibitor preparation device 4 according to the different conditions of the goaf. After receiving the work instruction, the PLC programmable controller 5 will automatically control the water pump 8 to be turned on; and open the solenoid valves 17 on the corresponding feed pipe 14 and delivery pipe 16 according to the different abnormal areas, and open the solenoid valves 17 on the liquid inlet pipe and the liquid delivery pipe, thereby spraying the inhibitor liquid into the abnormal area.

[0036] Specifically, when the monitoring value of the bundle tube monitoring device 1 installed on the oxidation zone is abnormal, the industrial control computer 3 will send a working instruction to the PLC programmable controller 5 installed on the inhibitor preparation box. After receiving the working instruction, the PLC programmable controller 5 will automatically control the water pump 8 in the middle preparation chamber 6 of the inhibitor preparation device 4 to be turned on, and open the solenoid valve 17 on the middle feed pipe 14 and the solenoid valve 17 on the middle feed pipe 16, thereby spraying the inhibitor liquid onto the oxidation zone. When the monitoring value of the bundle tube monitoring device 1 installed on the heat dissipation zone is abnormal, the industrial control computer 3 will send a working instruction to the PLC programmable controller 5 installed on the inhibitor preparation box. After receiving the working instruction, the PLC programmable controller 5 will automatically control the water pump 8 in the right preparation chamber 6 of the inhibitor preparation device 4 to be turned on, and open the solenoid valve 17 on the right feed pipe 14 and the solenoid valve 17 on the right feed pipe 16, thereby spraying the inhibitor liquid onto the heat dissipation zone. When the monitoring value of the bundle tube monitoring device 1 installed in the asphyxiation zone is abnormal, the industrial control computer 3 will send a working instruction to the PLC programmable controller 5 installed on the inhibitor preparation box. After receiving the working instruction, the PLC programmable controller 5 will automatically control the water pump 8 in the preparation chamber 6 on the left side of the inhibitor preparation device 4 to be turned on, and open the solenoid valve 17 on the feed pipe 14 on the left side and the solenoid valve 17 on the feed pipe 16 on the left side, thereby spraying the inhibitor liquid into the asphyxiation zone.

[0037] That is, in the embodiment, the three zones in the goaf are one-to-one corresponding to the three preparation cavities 6, and different preparation cavities 6 prepare different types of inhibitors to meet the prevention and control needs of the corresponding areas; however, when the inhibitor solution in the preparation cavity 6 corresponding to a certain zone, such as the heat dissipation zone, is in a state of deficiency, and the heat dissipation zone still has a spontaneous combustion tendency, the industrial computer 3 can pump the inhibitor solution in the other two preparation cavities 6 to the heat dissipation zone according to the situation, so as to better prevent and control the mine coal spontaneous combustion; and during this period, the preparation cavity 6 with a deficient inhibitor solution can automatically prepare the inhibitor solution quickly.

[0038] It should be noted that, in actual application, the specific number of the preparation cavities 6 in the inhibitor preparation device 4 is not limited by the embodiment, and the preparation cavities 6 can be two, four or even more, that is, the specific number of the preparation cavities 6 in the inhibitor preparation device 4 can be adaptively adjusted according to specific needs.

[0039] In the description of the present application, it should be noted that the terms "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0040] In the description of the present application, specific examples are applied to describe the principles and implementation modes of the present application, and the above description of the embodiments is only for the purpose of helping to understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In view of the above, the content of the present application should not be understood as a limitation on the present application.

Claims

1. A mine goaf three-zone blocking agent intelligent spraying system, characterized in that: The application relates to a fire extinguishing system for goaf, which comprises a monitoring unit, a control unit, a spraying pipeline and a fire retardant preparation device. ​ The monitoring unit comprises three beam tube monitoring devices arranged in a suffocation zone, an oxidation zone and a heat dissipation zone respectively, and the beam tube monitoring devices are used for monitoring actual temperature values and concentration values of index gases; the fire retardant preparation device is internally provided with at least two preparation cavities, each of which is provided with a stirrer and a discharge port; The number of the preparation cavities is three; the top of each preparation cavity is provided with an infrared detector, and the top of the stirrer is provided with an infrared receiving device which is used for receiving infrared rays emitted by the infrared detector; the infrared receiving device and the infrared detector are respectively connected with a PLC programmable controller in signal mode; the infrared receiving device is lower than the infrared detector and can be submerged by materials in the preparation cavity; The spraying pipeline comprises a main pipe, a feeding pipe corresponding to each preparation cavity and three material conveying pipes; one end of each feeding pipe is communicated with the discharge port of the corresponding preparation cavity, and the other end of each feeding pipe is communicated with one end of the main pipe; one end of each material conveying pipe is communicated with the other end of the main pipe; the other end of each material conveying pipe is communicated with three zones in a goaf and is provided with a spray head; The control unit comprises an industrial computer and a PLC programmable controller connected with the industrial computer in signal mode; the beam tube monitoring devices are connected with the industrial computer in signal mode through a signal adapter; each feeding pipe and each material conveying pipe is provided with an electromagnetic valve connected with the PLC programmable controller in signal mode; when the fire retardant solution in the preparation cavity corresponding to a certain zone in the goaf is in a deficient state and the zone still has a spontaneous combustion tendency, the industrial computer can pump the fire retardant solutions in the other two preparation cavities into the zone according to the situation.

2. The gob three-zone inhibitor intelligent spraying system of claim 1, characterized in that: The spray heads on the material conveying pipes arranged in the oxidation zone and the suffocation zone are high-pressure spray heads, and the spray head on the material conveying pipe arranged in the heat dissipation zone is a self-rotating sprayer.

3. The gob three-zone inhibitor intelligent spraying system of claim 1, characterized in that: The preparation cavity is provided with a water pressure sensing device for detecting hydraulic pressure, and the water pressure sensing device is connected with the PLC programmable controller in signal mode.

4. The gob three-zone inhibitor intelligent spraying system of claim 1, characterized in that: The preparation cavity is further provided with a water pump for pumping materials in the preparation cavity, and the water pump is connected with the PLC programmable controller in electric mode.

5. The gob three-zone inhibitor intelligent spraying system of claim 1, characterized in that: Each preparation cavity is connected with a sub-water inlet pipe, each sub-water inlet pipe is communicated with one end of a total water inlet pipe, the other end of the total water inlet pipe is communicated with a water outlet of a water tower, and each sub-water inlet pipe is provided with an electromagnetic valve connected with the PLC programmable controller in signal mode.

Images