A mobile automatic grouting fire prevention and extinguishing equipment for coal mines

Abstract

The present invention discloses a mobile automatic grouting fire prevention and extinguishing equipment for coal mines. The grouting equipment includes a feeding system, a water supply system, a slurry making system, a pumping system, a control system, and a mobile assembly. First, the feeding system and the water supply system transport loess and clean water respectively, and are provided with a vibration feeding function to accelerate the loess transportation; secondly, the control system monitors and controls the material transportation volume of each system in real time, and adjusts the water-soil ratio of the slurry; thirdly, the slurry making system continuously stirs, mixes and filters the slurry; then, the pumping system uses a plunger pump to pressurize and pump the slurry to the grouting point, and a reducing flange is provided to change the diameter of the slurry delivery pipeline, reduce pipeline wear, and increase the grouting pressure; finally, the system is integrated into a skid-mounted shell and is moved to the grouting site for operation using a trailer. The present invention has a clear structure, is safe and reliable, and realizes large-flow mobile automatic grouting through system design, improves the grouting efficiency, and avoids the problems of excessively high pipeline laying costs and insufficient grouting pressure during long-distance grouting.

Description

Technical Field

[0001] The invention patent relates to the technical field of grouting equipment, and in particular to a mobile automatic grouting fire prevention and extinguishing equipment on the ground of a coal mine. Background Art

[0002] Mine fire is one of the five major disasters in my country's coal mines, of which 90-94% are caused by spontaneous combustion of coal. For coal mines with a tendency to spontaneous combustion, grouting fire prevention and extinguishing methods can be used for control. After the slurry is injected into the overlying rock layer and other areas of the goaf, it can effectively control the spontaneous combustion of coal in the goaf due to its good density and cooling effect.

[0003] The current mine grouting system can be divided into centralized grouting system and decentralized grouting system. The centralized grouting system is suitable for deep mining and fixed grouting stations need to be established on the ground; the decentralized grouting system includes ground drilling grouting and underground mobile grouting. The ground mobile grouting system is suitable for shallow coal seams and widely distributed grouting sites, which require ground drilling grouting conditions; underground mobile grouting is suitable for underground mining areas that are dispersed, grouting demand is small, and ground grouting is difficult.

[0004] The existing ground grouting system is difficult to meet the requirements of both mobility and large flow. It is unable to effectively solve the problem of spontaneous combustion of coal in the goaf when multiple overlapping disturbance mining of shallowly buried self-igniting coal seams occurs. Summary of the invention

[0005] In order to solve the problems of serious air leakage and high spontaneous combustion tendency of shallow buried coal seams, the present invention provides a grouting equipment for coal mine fire prevention and extinguishing, which has the characteristics of large flow, mobility, automatic grouting and wear resistance.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention proposes a coal mine ground mobile automatic grouting fire prevention and extinguishing equipment, the grouting equipment comprising:

[0008] A feeding system, the feeding system is used to provide loess materials required for the mixed slurry, and the feeding system is connected with the slurry making system;

[0009] A water supply system, the water supply system is used to provide clean water required for the mixed slurry, and the water supply system is in sealed communication with the slurry making system;

[0010] A pulping system, wherein the pulping system is used for stirring and mixing pulping, and a discharge port of the pulping system is sealed and connected to a pumping system;

[0011] A pumping system, the pumping system is used for pressurizing and pumping the slurry;

[0012] A control system, which is used to control the operation process of the equipment, and the control system is connected with the feeding system, the water supply system, the pulping system, and the pumping system through sensors;

[0013] Mobile assembly, the mobile assembly is used to carry system equipment components.

[0014] Preferably, the feeding system includes a vibrating feeder and a belt conveyor; the vibrating feeder is used to crush and filter loess and provide grouting materials. The vibrating feeder includes a feeder inlet, a feeder vibration motor, a feeder outlet, a feeder housing, a feeder vibration spring, and a fixed base. A filter screen is provided in the vibrating feeder, and the vibration motor crushes the loess and shakes it down, and the loess is filtered and discharged by the filter screen and then falls into the belt conveyor;

[0015] Preferably, the belt conveyor includes a fixed front section, a weighing middle section, a fixed rear section, a conveying belt, a tensioning device, a driving motor, a conveyor feed port and a conveyor discharge port; the belt conveyor is arranged at an angle, the upper feed port is connected to the feed port of the feeder, and the end discharge port is connected to the feed port of the pulping machine.

[0016] Preferably, the water supply system includes a water pump and a water hose; when the water pump is working, it is placed in the water reservoir and connected to the water inlet of the pulping machine through the water hose, and a metering flow meter is set at the connection between the water hose and the pump body drain port;

[0017] Preferably, the water pump includes a pump body casing and a water pump motor for driving the water pump, the pump body and the water pump motor are respectively placed inside and outside the water reservoir, the water pump water intake port is located at the bottom of the water reservoir, and the water pump discharge port is located at the upper part of the water reservoir; the water pump motor can pump out water when it is running.

[0018] Preferably, the pulping system includes a pulping machine, a pulp filter, and a slag collecting box; the pulping machine includes a pulping machine motor, a transmission belt, a protective cover, a stirring shaft, a shaft seal, a pulping machine feed port, a pulping machine water inlet, and a pulping machine outlet; the stirring shaft has a crushing function and can be disassembled and replaced to ensure that the pulping machine has the ability to crush loess and prepare slurry at high speed; the shaft seal is arranged at the connection between the stirring shaft and the pulping machine housing, and is a three-layer packing and two-layer oil seal design to ensure that the slurry does not overflow; the pulp filter is arranged at the end of the pulp filter screen, and the slurry enters the pulp filter after being evenly mixed in the pulping machine, and after the impurities are separated by the screen vibration, it enters the slag collecting box and is discharged;

[0019] Preferably, the pulp filter includes a shell, a base, a connecting plate, a screen frame, a spring, a vibration motor, and a pulp outlet; the screen frame includes a shell, a screen, and a screen frame strip; the shell is connected to the lower end base by a spring and fixed by a connecting plate; the screen frame strip fixes the screen in the shell and is arranged at an angle to ensure that the slurry residue can enter the residue collection box; the vibration motor is arranged at the upper end of the shell and fixedly connected to the shell, and the vibration of the shell is driven by the vibration of the motor.

[0020] Preferably, the pumping system comprises a slurry storage tank, a grouting pump, a reducer flange and a slurry delivery pipeline; the slurry outlet of the slurry storage tank is sealed and connected with the slurry suction port of the grouting pump; the slurry outlet of the grouting pump is sealed and connected with the slurry delivery pipeline through the reducer flange; a vacuum pump is arranged at the upper end of the slurry storage tank;

[0021] Preferably, the grouting pump outlet size is DN150, and the grouting pipeline includes two specifications of DN150 and DN100, which are suitable for the pipe diameter requirements of different grouting occasions and reduce grouting losses; the grouting pump outlet can be directly connected to the grouting pipeline of DN150 specification, which is used in large flow occasions such as surface fissure grouting; the reducer flange is DN150 to DN100, and the grouting pump can be connected to the grouting pipeline of DN100 specification through the reducer flange, which is used in occasions with smaller grouting flow.

[0022] Preferably, the control system includes a PLC control cabinet, a weighing sensor, a metering flow meter, and a liquid level monitor; the weighing sensor is arranged under the belt of the belt conveyor of the feeding system to monitor the quality of the transported loess; a metering flow meter 1 is arranged in the water belt of the water supply system to monitor the flow of clean water; a metering flow meter 2 is arranged at the slurry outlet of the grouting pump of the pumping system to monitor the slurry flow; a liquid level monitor 1 is arranged in the water reservoir to monitor the water level of the water reservoir to ensure sufficient water source; a liquid level monitor 2 is arranged at the upper end of the inner wall of the slurry storage tank of the pumping system to monitor the slurry inventory in the slurry storage tank.

[0023] Preferably, the mobile assembly includes a skid-mounted shell and a trailer; the skid-mounted shell is placed on and fixed to the trailer, and after the trailer is moved to the grouting site, the grouting equipment is moved as a whole to the ground through the lifting point at the upper end of the skid-mounted shell and the grouting work begins.

[0024] The control method of the mobile automatic grouting fire prevention and extinguishing equipment on the ground of a coal mine comprises the following steps:

[0025] S1 Ensure that the amount of loess in the loess storage area is sufficient to complete the grouting work, and ensure that the amount of water in the reservoir is sufficient to complete the grouting work;

[0026] S2 manually starts the PLC control cabinet, which controls the start-up of the vibrating feeder, pulping machine and pulp filter;

[0027] The S3 loader delivers sufficient loess to the vibrating feeder, then starts the pump and belt conveyor and sets the frequency;

[0028] The S4 weighing sensor monitors in real time whether the material delivery volume reaches the set target. If it does not reach the set target, the vibrating feeder and belt conveyor will continue to run. If it reaches the set target, the vibrating feeder and belt conveyor will stop running. The metering flow meter monitors in real time whether the clean water delivery volume reaches the set target. If it does not reach the set target, the water pump will continue to run. If it reaches the set target, the water pump will stop running.

[0029] After the S5 pulping machine has finished stirring and the pulp filter has finished filtering, the slurry is injected into the slurry storage tank, the vacuum pump and the grouting pump of the slurry storage tank are started, and the liquid level monitoring meter 2 monitors the slurry stock in the slurry storage tank in real time. If it is lower than the set target, the grouting pump is stopped;

[0030] S6 If grouting needs to be continued, repeat steps 3-5. If grouting is to be stopped, continue to run the grouting pump alone until the slurry is completely discharged, then start the water pump, inject clean water into the pipeline, clean the pipeline, stop all equipment after cleaning, and complete the grouting operation.

[0031] Due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0032] (1) The present invention can realize large-flow continuous grouting, select a high-specification plunger pump to pump the slurry, cooperate with a vibrating feeder to vibrate and crush the loess, and continuously prepare the slurry through a high-speed pulping machine, thereby improving the efficiency of grouting and grouting.

[0033] (2) The present invention is mobile, which reduces the cost of laying pipelines during long-distance grouting and improves the grouting effect. The skid-mounted casing is used as an equipment carrier to integrate various systems into the skid-mounted casing to avoid the influence of the surrounding environment and achieve a high degree of integration. A lifting point is provided at the upper end of the skid-mounted casing. After being lifted and fixed on a trailer, it can be quickly moved to the grouting site to carry out grouting operations.

[0034] (3) The present invention realizes the functions of soil-water ratio adjustment, process control, shutdown protection, etc. in the entire pulping and grouting process through the mutual cooperation of multiple liquid level monitors, metering flow meters, weighing sensors, PLC control cabinets, etc., thereby reducing the manual operation process and improving pulping efficiency and reliability.

[0035] (4) The present invention can reduce the loss during the grouting process, adjust the outlet diameter of the grouting pump through the variable-diameter flange, and thus reduce the kinetic energy loss of the slurry in the grouting pipeline under different grouting flow rates, effectively slow down the wear of the inner wall of the grouting pipeline, and adapt to the grouting flow requirements of different occasions such as surface fissures and working face goafs. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the overall structure of a coal mine ground mobile automatic grouting fire prevention and extinguishing equipment of the present invention;

[0037] Figure 2This is a structural schematic diagram of a vibrating feeder of a feeding system of a coal mine ground mobile automatic grouting fire prevention and extinguishing equipment according to the present invention;

[0038] Figure 3 This is a schematic diagram of the water supply system structure of a coal mine ground mobile automatic grouting fire prevention and extinguishing equipment of the present invention;

[0039] Figure 4 It is a structural schematic diagram of a belt conveyor of a feeding system of a coal mine ground mobile automatic grouting fire prevention and extinguishing equipment according to the present invention;

[0040] Figure 5 It is a schematic diagram of the structure of a grouting system of a coal mine ground mobile automatic grouting fire prevention and extinguishing equipment of the present invention;

[0041] Figure 6 This is a schematic diagram of the structure of a slurry storage tank of a pumping system of a coal mine ground mobile automatic grouting fire prevention and extinguishing equipment according to the present invention;

[0042] Figure 7 This is a schematic diagram of the structure of a grouting pump of a pumping system of a coal mine ground mobile automatic grouting fire prevention and extinguishing equipment according to the present invention;

[0043] Figure 8 The present invention is a schematic diagram of the structure of a mobile assembly of a coal mine ground mobile automatic grouting fire prevention and extinguishing equipment.

[0044] In the attached figure: 1 vibrating feeder, 11 feeder inlet, 12 feeder vibration motor, 13 feeder outlet, 14 feeder housing, 15 feeder vibration spring, 16 fixed base, 17 filter screen, 2 water pump, 21 water pump housing, 22 water pump motor, 23 water belt, 24 metering flow meter 1, 25 water pump suction port, 26 water pump discharge port, 3 belt conveyor, 31 fixed front section, 32 weighing middle section, 321 weighing sensor, 33 fixed rear section, 331 dust cover, 34 belt, 35 tensioning device, 36 conveying motor, 37 conveyor inlet, 38 conveyor outlet, 4 pulping machine, 41 pulping machine motor, 42 transmission belt, 43 protective cover, 44 stirring shaft, 45 shaft Seal, 46 pulping machine feed port, 47 pulping machine water inlet, 48 pulping machine outlet, 49 mixing bin, 5 pulp filter, 51 shell, 52 pulp filter base, 53 connecting plate, 54 screen, 55 pulp filter spring, 56 pulp filter vibration motor, 57 pulp filter outlet, 58 slag collecting box, 6 pulp storage tank, 61 vacuum pump, 62 liquid level monitoring meter, 63 pulp storage tank inlet, 64 pulp storage tank outlet, 65 metering flow meter 2, 7 grouting pump, 71 grouting pump suction port, 72 grouting pump outlet, 73 reducing flange, 74 slurry water belt, 75 grouting pump motor, 8PLC control cabinet, 9 mobile assembly, 91 skid-mounted shell, 911 lifting point, 92 trailer, 921 fixing pin, 922 hydraulic support. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] like Figure 1 to Figure 7 As shown, a coal mine ground mobile automatic grouting fire prevention and extinguishing equipment includes a feeding system, a water supply system, a slurry making system, a pumping system, a control system, and a mobile assembly.

[0048] The vibrating feeder 1 has a feeder inlet 11 at the top and a feeder outlet 13 at the bottom. A feeder vibration motor 12 is provided on the side wall of the vibrating feeder. The vibration motor 12 crushes the loess and shakes it down, and the loess is filtered and discharged by the filter screen 17 and falls into the feeder outlet 13. The feeder housing 14 is connected to the fixed base 16 through the feeder vibration spring 15. The feeder vibration motor 12 is connected to the PLC control cabinet 8 to control the start and stop of the vibration motor.

[0049] The water supply system is used to extract clean water from a water source, and includes a water pump 2 and a water hose 23. The water pump is placed in a water reservoir when in operation. The water pump 2 includes a water pump housing 21 and a water pump motor 22 for driving the water pump, and the water pump motor 22 is placed in a skid-mounted housing. The water pump suction port 25 is located at the bottom of the water reservoir, and the water pump discharge port 26 is located at the upper part of the water reservoir. The water pump motor 22 of the water pump is connected to a PLC control cabinet 8, and the control cabinet controls the start and stop of the water pump motor 22 to control the operation of the water pump 2.

[0050] A metering flow meter 24 is provided at the connection between the water hose 23 and the pump body drain port 26 , and the metering flow meter 24 is connected to the PLC control cabinet 8 to transmit the clean water flow data to the PLC control cabinet 8 .

[0051] The belt conveyor 3 is arranged below the vibrating feeder 1 and can convey loess to the pulping machine 4. The belt conveyor 3 is arranged at an angle and includes a fixed front section 31, a weighing middle section 32, a fixed rear section 33, a belt 34, a tensioning device 35, a conveying motor 36, a conveyor feed port 37, and a conveyor discharge port 38. The feeder discharge port 13 is located inside the conveyor feed port 37 and adopts non-contact docking to reserve space for the vibration amplitude of the vibrating feeder 1. The conveyor discharge port 38 is located above the pulping machine feed port 41. The drive motor 36 is connected to the PLC control cabinet 8 to control the start and stop of the belt conveyor 3.

[0052] The belt conveyor 3 and the vibrating feeder 1 are both located on a fixed base 16 , the connection point between the vibrating feeder 1 and the fixed base 16 is located on the outside, and the connection point between the belt conveyor 3 and the fixed base 16 is located on the inside.

[0053] In order to monitor the real-time loess transport volume of the belt conveyor 3, a weighing sensor 321 is provided in the weighing middle section 32. The weighing sensor 321 is connected to the PLC control cabinet 8 to transmit the real-time loess transport volume data to the PLC control cabinet 8, thereby controlling the total loess transport volume.

[0054] In order to prevent dust from leaking out of the conveyor discharge port 38 when the conveyor is working, the fixed rear section 33 is provided with a dust cover 331. The dust cover 331 can prevent dust from leaking out and causing environmental pollution when the belt conveyor 3 transports loess to the pulping machine 4.

[0055] The pulping machine 4 includes a pulping machine motor 41, a transmission belt 42, a protective cover 43, a stirring shaft 44, a shaft seal 45, a pulping machine feed port 46, a pulping machine water inlet 47, a pulping machine slurry outlet 48, and a stirring chamber 49, which are used for mixing loess and clean water. The upper end of the pulping machine feed port 46 is the conveyor outlet 38. The pulping machine water inlet 47 is arranged on the side of the pulping machine shell and is connected to the water pump 2 through a water belt 23. The pulping machine motor 41 is connected to the PLC control cabinet 8, and the pulping rate is adjusted by controlling the rotation speed of the stirring shaft 44, and the pulping machine 4 is controlled to start and stop. A pulp filter 5 is arranged below the pulping machine outlet 48.

[0056] The pulp filter 5 includes a housing 51, a pulp filter base 52, a connecting plate 53, a screen 54, a pulp filter spring 55, a pulp filter vibration motor 56, a pulp filter outlet 57, and a slag collecting box 58. After the slurry is evenly mixed in the pulping machine 4, it falls into the pulp filter 5 from the pulping machine outlet 48, and the impurities are separated by vibration through the screen 54. The lower layer of slurry enters the pulp storage tank 6 through the pulp filter outlet 57. The screen 54 is arranged obliquely so that the upper impurities fall into the slag collecting box 58 after vibration.

[0057] The pulp filter housing 51 is connected to the pulp filter base 52 through the pulp filter spring 55, and a pulp filter vibration motor 56 is provided at the upper end. The pulp filter vibration motor 56 is connected to the PLC control cabinet 8, and the screening function is realized by vibrating the housing 51. The connecting plate 53 is arranged between the housing 51 and the pulp filter base 52 to ensure the overall stability of the equipment when the pulp filter 5 stops working.

[0058] The slurry storage tank 6 is sealed, and a vacuum pump 61 is provided at the upper end of the outer shell. A liquid level monitor 62 is provided inside the slurry storage tank 6 to monitor the position of the slurry level in the tank. The vacuum pump 61 and the liquid level monitor 62 are connected to the PLC control cabinet 8. The slurry of the pulp filter 5 enters the tank through the slurry inlet 63 of the slurry storage tank. When the slurry level in the slurry storage tank 6 just reaches the upper end of the pipeline of the slurry inlet 63 of the slurry storage tank, the vacuum pump 61 is started to make the upper space of the slurry in the tank in a low pressure state, so as to ensure that the slurry will not flow back into the pulp filter 5.

[0059] The other end of the slurry storage tank 6 is provided with a slurry storage tank outlet 64, which is sealed and connected to the slurry suction port 71 of the grouting pump through a slurry conveying water belt 74, and the slurry storage tank 64 outlet is located below the slurry storage tank inlet 63. A metering flow meter 2 65 is provided at the slurry storage tank outlet 64 to record the total amount of slurry delivered to the grouting pump 7, and the metering flow meter 2 65 is connected to the PLC control cabinet 8.

[0060] The grouting pump 7 is a swash plate type axial piston pump, and the grouting pump 7 is connected to a PLC control cabinet 8 to control the operation of the grouting pump motor 7. The grouting pump motor 7 is a variable frequency motor to adjust the grouting amount of the grouting pump 7.

[0061] The grouting pump outlet 72 has a diameter of DN150 and can be directly connected to a grouting pipeline with a diameter of DN150, and is used in large flow situations such as surface fissure grouting.

[0062] In order to avoid the problem of insufficient grouting pressure caused by the incompatibility of the grouting pipeline diameter when the grouting flow rate is small, the grouting pump outlet 72 is provided with a reducing flange 73. The reducing flange 73 is a DN150 to DN100 model, and is connected to the grouting pipeline with a diameter of DN100.

[0063] The PLC controller 8 includes a frequency converter, a motor integrated protector, a circuit breaker, an intermediate relay, a mass flow recording module, a soil-water ratio calculation module, a start button, a stop button, an emergency stop and an alarm device.

[0064] The mobile assembly 9 includes a skid-mounted housing 91 and a trailer 92. The skid-mounted housing 91 is placed on the trailer 92 and is stabilized by a fixing pin 921. A lifting point 911 is provided at the upper end of the skid-mounted housing to lift the grouting equipment as a whole to the ground for operation. During the lifting, the hydraulic support 922 needs to be opened to stabilize the trailer 92.

[0065] The method for using the mobile automatic grouting fire prevention and extinguishing equipment on the ground of a coal mine comprises the following steps:

[0066] S1 Ensure that the amount of loess in the loess storage area is sufficient to complete the grouting work, and ensure that the amount of water in the reservoir is sufficient to complete the grouting work;

[0067] S2 manually starts the PLC control cabinet 8, and the PLC control cabinet 8 controls the vibration feeder 1, the pulping machine 4 and the pulp filter 5 to start;

[0068] S3 loader delivers enough loess to vibrating feeder 1, then starts pump 2 and belt conveyor 3 and sets the frequency. After vibration, large pieces of loess are broken and fall into belt conveyor 3, which then delivers the loess to pulping machine 4 and weighs the loess mass.

[0069] S4 weighing sensor 321 monitors in real time whether the material delivery volume reaches the set target. If it does not reach the set target, the vibrating feeder 1 and the belt conveyor 3 are continuously operated. If it reaches the set target, the vibrating feeder 1 and the belt conveyor 3 are stopped. Metering flow meter 24 monitors in real time whether the clean water delivery volume reaches the set target. If it does not reach the set target, the water pump 2 is continuously operated. If it reaches the set target, the water pump 2 is stopped.

[0070] After the mixing of the pulping machine S5 is completed, the slurry is filtered by the pulp filter 5 and injected into the slurry storage tank 6, and the grouting pump 7 is started. The liquid level monitoring meter 62 monitors the slurry storage in the slurry storage tank 6 in real time. If it is lower than the set target, the grouting pump 7 is stopped; the metering flow meter 2 65 monitors the real-time grouting volume and the cumulative total grouting volume;

[0071] S6 If grouting needs to be continued, repeat steps 3-5. If grouting is to be stopped, the grouting pump 7 is operated alone until the slurry is completely discharged, and then the pump 2 is started to inject clean water into the pipeline to clean the pipeline. After cleaning, all equipment is stopped to complete the grouting operation.

[0072] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A method for implementing mobile automatic grouting fire prevention and extinguishing equipment on the ground of a coal mine, characterized in that: It includes the following six steps: S1 Ensure that the amount of loess in the loess storage area is sufficient to complete the grouting work, and ensure that the amount of water in the reservoir is sufficient to complete the grouting work; S2 manually starts the PLC control cabinet, which controls the start-up of the vibrating feeder, pulping machine and pulp filter; The S3 loader delivers sufficient loess to the vibrating feeder, then starts the pump and belt conveyor and sets the frequency; The S4 weighing sensor monitors in real time whether the material delivery volume reaches the set target. If it does not reach the set target, the vibrating feeder and belt conveyor will continue to run. If it reaches the set target, the vibrating feeder and belt conveyor will stop running. The metering flow meter monitors in real time whether the clean water delivery volume reaches the set target. If it does not reach the set target, the water pump will continue to run. If it reaches the set target, the water pump will stop running. After the S5 pulping machine has finished stirring and the pulp filter has finished filtering, the slurry is injected into the slurry storage tank, the vacuum pump and the grouting pump of the slurry storage tank are started, and the liquid level monitoring meter 2 monitors the slurry stock in the slurry storage tank in real time. If it is lower than the set target, the grouting pump is stopped; S6 If grouting needs to be continued, repeat steps 3-5. If grouting is to be stopped, the grouting pump is operated alone until the slurry is completely discharged, and then the water pump is started to inject clean water into the pipeline to clean the pipeline. After cleaning, all equipment is stopped to complete the grouting operation; The coal mine ground mobile automatic grouting fire prevention and extinguishing equipment comprises: Feeding system, including vibrating feeder and belt conveyor; Water supply system, including pumps and hoses; Pulping system, including pulping machine, pulp filter and slag box; Pumping system, including grout storage tanks and grout pumps; Control system, including PLC control cabinet, level meter, weighing sensor, density meter and flow meter; Mobile assembly, including skid housing and trailer.

2. The implementation method of a coal mine ground mobile automatic grouting fire prevention and extinguishing equipment according to claim 1 is characterized in that: In the feeding system, a high-specification plunger pump is selected to powerfully pump the slurry, ensuring a stable supply of slurry and continuity of high-pressure grouting; in order to further improve the grouting efficiency, the system is equipped with a vibrating feeder, which is located above the belt conveyor and can efficiently vibrate and crush the loess to ensure full dispersion of the material, avoid the loess from clumping during the feeding process, and ensure that the loess can fall smoothly; in addition, the combined use of the vibrating feeder and the screen can effectively preliminarily screen out impurities in the loess, reduce the impurity content in the slurry, and ensure the quality of the slurry; the system continuously prepares the slurry through a high-speed pulping machine, which significantly improves the pulping speed and grouting efficiency, ensuring that the equipment can still operate efficiently and the slurry can be stably supplied in a high-flow operating environment, meeting the needs of coal mine fire prevention and extinguishing operations for large-scale and efficient grouting.

3. The implementation method of the coal mine ground mobile automatic grouting fire prevention and extinguishing equipment according to claim 1 is characterized in that: In the pumping system, a slurry storage tank is arranged inside the slurry storage tank, and a vacuum pump above the slurry storage tank is used to increase the pressure difference between the slurry filter and the slurry storage tank, thereby avoiding the complicated procedure of digging a slurry storage tank on the ground to transport the slurry in the traditional method. The slurry storage tank has the function of buffering the slurry to avoid the grouting pump from running idle. The grouting pump is connected to the slurry delivery pipeline to pump the slurry to the grouting site under pressure. A detachable reducing flange is arranged at the slurry outlet of the grouting pump. For occasions with a large grouting flow rate, the grouting pump is connected to a DN150 slurry delivery pipeline to reduce the wear of the inner wall of the pipeline and the loss of kinetic energy of the slurry. For occasions with a small grouting flow rate, a reducing flange is assembled to connect the DN100 slurry delivery pipeline to avoid too low grouting pressure and improve the grouting effect.

4. The implementation method of a coal mine ground mobile automatic grouting fire prevention and extinguishing equipment according to claim 1 is characterized in that: In the mobile assembly, the skid-mounted shell serves as an equipment carrier, and various systems are integrated therein to avoid the influence of the surrounding environment and temperature changes on the operation of the equipment, with a high degree of integration; a lifting point is arranged on the upper end of the skid-mounted shell, and after the equipment is lifted and fixed on the trailer as a whole, it can be quickly moved to the grouting site for grouting, thereby reducing the cost of laying pipelines, improving the grouting efficiency, and avoiding the defect that the fixed grouting station has poor effect on the grouting site at a long distance.

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