Fire preventing and extinguishing method for coal yard

Abstract

The invention discloses a fire preventing and extinguishing method for a coal yard. The fire preventing and extinguishing method comprises the steps that S1, a material A and a material B are added into a material storage device; s2, adding a first set amount of water into the stirring cavity; s3, adding a second set amount of material A into the stirring cavity; s4, adding a third set amount of material B into the stirring cavity; s5, the slurry formed in the step S4 is sprayed to a fire prevention and extinguishment area to be sprayed, and when the pressure at a slurry spraying outlet is smaller than a set pressure value, a slurry spraying pump is controlled to be closed; s6, the control device controls a backwashing water supply assembly to quantitatively or regularly convey washing water into the stirring cavity; s7, judging whether fire preventing and extinguishing guniting work needs to continue or not, if yes, judging whether charging is needed in the A material storage device and the B material storage device or not, and if not, returning to the step S2; if yes, feeding is needed firstly, and then the step S2 is executed again. According to the fire preventing and extinguishing method for the coal yard, the fire preventing and extinguishing guniting construction process is more intelligent, and the construction process is stable and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of fire prevention and extinguishing, and in particular to a method for fire prevention and extinguishing in a coal yard. Background Art

[0002] Nowadays, in places where coal is piled up, such as power plants, steel mills, and ports, the coal piles are prone to spontaneous combustion due to oxidation, resulting in reduced calorific value, environmental pollution, fires, and other adverse effects. In order to solve this problem, the method of spraying is generally used to form an oxygen-isolating layer on the surface of the coal pile, cut off the air leakage and oxygen supply channel, slow down the oxidation process of the coal body, and thus play a role in preventing and extinguishing the fire of the coal pile. In the related technology, there are problems such as low degree of automation, cumbersome construction operation, and unsatisfactory spraying effect during spraying. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to propose a coal yard fire prevention and extinguishing method, which can realize automatic proportioning and adding of materials, automatic stirring and slurrying, automatic slurry spraying and automatic flushing, so that the fire prevention and extinguishing slurry spraying construction process is more intelligent and the construction process is stable and reliable, the construction process is simple to operate, and at the same time, the material proportioning accuracy is high and the finished slurry consistency is good.

[0004] According to the coal yard fire prevention and extinguishing method of the embodiment of the present invention, the coal yard fire prevention and extinguishing method adopts a coal yard fire prevention and extinguishing device to perform fire prevention and extinguishing work, the coal yard fire prevention and extinguishing device includes a motor vehicle body and a fire prevention and extinguishing part arranged on the motor vehicle body, the fire prevention and extinguishing part includes: an A material storage device for storing A material and a B material storage device for storing B material; a mixing component, the mixing component includes a mixing bin and a mixing member, a mixing chamber is defined in the mixing bin, the mixing member is rotatably arranged in the mixing chamber, the mixing bin is provided with a water inlet, an A material inlet, a B material inlet and a slurry outlet communicated with the mixing chamber, the slurry outlet is provided with a slurry outlet control valve; a mixing water supply component, the mixing water supply component is suitable for connecting a water source and the water inlet for quantitatively conveying water at the water source to the mixing chamber; an A material conveying component, the A material conveying component is connected to the A material storage device and the A material inlet for conveying the A material stored in the A material storage device A material conveying assembly, the B material conveying assembly is connected to the B material storage device and the B material inlet for quantitatively conveying the B material stored in the B material storage device to the stirring chamber; a grouting pump, the grouting pump has a grouting inlet and a grouting outlet, the grouting inlet is connected to the slurry discharge control valve, the grouting outlet is suitable for connecting a spray gun or a grouting pipe, and a connecting pipeline between the grouting inlet and the slurry discharge control valve is provided with a backwashing interface; a backwashing water supply assembly, the backwashing water supply assembly is suitable for connecting the water source and the backwashing interface for quantitatively or regularly conveying flushing water from the downstream side of the slurry discharge port toward the stirring chamber; a control device, the control device is electrically connected to the stirring element, the stirring water supply assembly, the A material conveying assembly, the B material conveying assembly, the grouting pump, the backwashing water supply assembly and the slurry discharge control valve; the coal yard fire prevention and extinguishing method comprises the following steps: S1: adding the A material into the A material storage device, and adding the B material into the B material storage device; S2: the control device controls the stirring and water supply assembly to add a first set amount of water into the stirring chamber; S3: the control device controls the material A conveying component to add a second set amount of material A into the stirring chamber. After the material A is added, the control device controls the stirring element to stir the water and material A added into the stirring chamber for a first set stirring time to form a mixed material. S4: the control device controls the B material conveying assembly to add a third set amount of the B material into the stirring chamber. After the B material is added, the control device controls the stirring member to stir the B material added into the stirring chamber with the mixed material formed in S3 for a second set stirring time to form the slurry required for spraying. S5: the control device controls the slurry discharge control valve and the spray pump to open, so as to spray the slurry formed in S4 to the fire prevention and extinguishing area to be sprayed. When the pressure at the spray outlet is less than the set pressure value, the control device controls the spray pump to close. S6: The control device controls the backwash water supply component to quantitatively or regularly deliver flushing water into the stirring chamber. When the water supply amount or water supply time of the backwash water supply component reaches the set flushing water supply amount or the set flushing water supply time, the control device controls the backwash water supply component to stop supplying water and controls the spray pump to start. When the pressure at the spray outlet is less than the set pressure value, the control device controls the spray pump and the slurry discharge control valve to close. S7: Determine whether the fire prevention and extinguishing spraying work needs to be continued. If it needs to be continued, determine whether the amount of the A material remaining in the A material storage device can meet the needs of the next pulping, and whether the amount of the B material remaining in the B material storage device can meet the needs of the next pulping: If it can be satisfied, return to S2; if it cannot be satisfied, it is necessary to first replenish the A material in the A material storage device and replenish the B material in the B material storage device, and then return to S2 until the fire prevention and extinguishing spraying work is completed.

[0005] According to the coal yard fire prevention and extinguishing method of the embodiment of the present invention, the fire prevention and extinguishing device used can move freely, and can be connected to the slurry site for slurry making and slurry spraying after receiving the material from the silo, thereby saving the slurry spraying pipeline, and can accurately spray according to the temperature measurement of the coal pile, improve work efficiency, and save costs; in addition, the fire prevention and extinguishing device integrates material storage, feeding, stirring, slurry spraying and flushing, and one-time material collection can meet the needs of multiple slurry making, without multiple round trips to the silo to collect materials, and the slurry spraying has high continuity, and can realize automatic quantitative proportioning and adding of materials, and no other vehicles (such as ash tankers or forklifts) are required to cooperate during the material addition process, thereby not only saving labor, but also making the finished slurry more consistent. The coal yard fire prevention and extinguishing method of the embodiment of the present application can realize automatic proportioning and adding of materials, automatic stirring and slurry making, automatic slurry spraying and automatic flushing, thereby making the fire prevention and extinguishing slurry spraying construction process more intelligent and the construction process stable and reliable, the construction process is simple to operate, and at the same time, the material ratio is high in precision and the finished slurry has good consistency.

[0006] In addition, the coal yard fire prevention and extinguishing method according to the embodiment of the present invention may also have the following additional technical features: According to one embodiment of the present invention, the fire prevention and extinguishing part also includes a display screen, which can be used to display at least one of the weight of the A material storage device, the weight of the B material storage device, the amount of water added into the stirring chamber by the stirring water supply component, the amount of the A material conveying component conveying into the stirring chamber, the amount of the B material conveying component conveying into the stirring chamber, the amount of water supplied into the stirring chamber by the backwashing water supply component or the water supply duration, the duration for the stirring element to stir the water added into the stirring chamber and the A material, the duration for the stirring element to stir the B material added into the stirring chamber and the mixed material, and the pressure value at the spraying outlet.

[0007] According to one embodiment of the present invention, the fire protection and extinguishing part also includes a power supply module, which has a mains power mode and a battery mode. The power supply module can switch between the mains power mode and the battery mode, and the background color of the display screen is different in the mains power mode and the battery mode.

[0008] According to one embodiment of the present invention, the fire protection and extinguishing part also includes a power supply module, which has a mains power mode and a battery mode. In the mains power mode, the spraying power of the spray pump can be switched between a low gear, a medium gear and a high gear; in the battery mode, the spraying power of the spray pump is at a low gear.

[0009] According to one embodiment of the present invention, the stirring chamber is provided with a low liquid level detection device for detecting the liquid level in the stirring chamber, and the low liquid level detection device is electrically connected to the control device. In S7, executing the return to S2 also needs to satisfy: the control device determines that the liquid level value detected by the low liquid level detection device is less than the set low liquid level threshold.

[0010] According to one embodiment of the present invention, the stirring bin includes a first stirring bin and a second stirring bin, the stirring element includes a first stirring element and a second stirring element, a first stirring chamber is defined in the first stirring bin, the first stirring bin is provided with a first water inlet, a first A material inlet, a first B material inlet and a first slurry outlet communicated with the first stirring chamber, a first slurry outlet control valve is provided at the first slurry outlet, the first slurry outlet control valve is connected to the spraying inlet, the first stirring element is rotatably provided in the first stirring chamber; a second stirring chamber is defined in the second stirring bin, the second stirring bin is provided with a second water inlet, a second A material inlet, a second B material inlet and a second slurry outlet communicated with the second stirring chamber, the second slurry outlet A second slurry discharge control valve is provided at the inlet of the mixing chamber, and the second slurry discharge control valve is connected to the spraying inlet. The second stirring member is rotatably arranged in the second stirring chamber, and the first stirring member, the second stirring member, the first slurry discharge control valve and the second slurry discharge control valve are all electrically connected to the control device; the mixing and water supply assembly is suitable for connecting the water source and the first water inlet, and connecting the water source and the second water inlet; the A material conveying assembly is connected to the A material storage device and the first A material inlet, and connects the A material storage device and the second A material inlet; the B material conveying assembly is connected to the B material storage device and the first B material inlet, and connects the B material storage device and the second B material inlet; In S2, the control device may control the stirring and water supplying assembly to add the first set amount of water to the first stirring chamber and the second stirring chamber respectively, and the control device may also control the stirring and water supplying assembly to add the first set amount of water to only one of the first stirring chamber and the second stirring chamber; In S3, the control device may control the A material conveying component to add the second set amount of the A material to the first stirring chamber and the second stirring chamber respectively, and the control device may also control the A material conveying component to add the second set amount of the A material only to one of the first stirring chamber and the second stirring chamber, and after the A material is added, the control device may control the first stirring member and the second stirring member to stir the materials in the first stirring chamber and the second stirring chamber respectively for the first set stirring time to form the mixed material, and the control device may also control only one of the first stirring member and the second stirring member to stir the materials in the corresponding stirring chamber for the first set stirring time to form the mixed material; In S4, the control device can control the B material conveying component to add the third set amount of the B material into the first stirring chamber and the second stirring chamber respectively, and the control device can also control the B material conveying component to add the third set amount of the B material only into one of the first stirring chamber and the second stirring chamber, and after the B material is added, the control device can control the first stirring member and the second stirring member to stir the materials in the first stirring chamber and the second stirring chamber respectively for the second set stirring time to form the slurry required for spraying, and the control device can also control only one of the first stirring member and the second stirring member to stir the material in the corresponding stirring chamber for the second set stirring time to form the slurry required for spraying.

[0011] According to one embodiment of the present invention, the stirring water supply assembly includes: a stirring water supply pipe and a flow metering device, the stirring water supply pipe includes a first stirring water supply section and a second stirring water supply section, the flow metering device is connected between the first stirring water supply section and the second stirring water supply section, the end of the first stirring water supply section away from the flow metering device is suitable for connecting to a water source, and the flow metering device is electrically connected to the control device; a first branch stirring water supply pipe and a first stirring water inlet control valve, one end of the first branch stirring water supply pipe is connected to the end of the second stirring water supply section away from the flow metering device, the other end of the first branch stirring water supply pipe is connected to the first water inlet, the first stirring water inlet control valve is arranged between the other end of the first branch stirring water supply pipe and the first water inlet, and the first stirring water inlet control valve is electrically connected to the control device; the second branch stirring water supply pipe A stirring water supply pipe and a second stirring water inlet control valve, one end of the second branch stirring water supply pipe is connected to an end of the second stirring water supply section away from the flow metering device, the other end of the second branch stirring water supply pipe is connected to the second water inlet, the second stirring water inlet control valve is arranged between the other end of the second branch stirring water supply pipe and the second water inlet, the second stirring water inlet control valve is electrically connected to the control device, in S2, the control device can control the first stirring water inlet control valve and the second stirring water inlet control valve to open so as to add the first set amount of water to the first stirring chamber and the second stirring chamber respectively, and the control device can also control only one of the first stirring water inlet control valve and the second stirring water inlet control valve to open so as to add the first set amount of water to only one of the first stirring chamber and the second stirring chamber.

[0012] According to one embodiment of the present invention, the connecting pipeline between the shotcrete inlet and the slurry discharge control valve includes a connecting joint, a first slurry discharge pipe and a second slurry discharge pipe, the connecting joint includes a first connecting port, a second connecting port and a third connecting port which are connected to each other, the third connecting port is connected to the shotcrete inlet, and the backwash interface is arranged on the side wall of the third connecting port; the first slurry discharge pipe connects the first slurry discharge control valve and the first connecting port, and the second slurry discharge pipe connects the second slurry discharge control valve and the second connecting port; the backwash water supply assembly includes a backwash water supply pipe and a backwash water supply control valve, one end of the backwash water supply pipe is suitable for connecting to a water source, and the other end of the backwash water supply pipe is connected to the backwash interface, the backwash water supply control valve is suitable for being arranged between the one end of the backwash water supply pipe and the water source, and the backwash water supply control valve is electrically connected to the control device.

[0013] According to one embodiment of the present invention, the mixing assembly further includes a connecting bin body and a switch door body, the connecting bin body being connected between the first stirring bin and the second stirring bin, a connecting chamber being defined in the connecting bin body, the connecting chamber being connected to both the first stirring chamber and the second stirring chamber, the switch door body being movably disposed on the connecting bin body between a first position and a second position, and when the switch door body is in the first position, the first stirring chamber and the second stirring chamber are connected through the connecting chamber; when the switch door body is in the second position, the switch door body separates the connecting chamber into a first connecting chamber and a second connecting chamber which are not connected to each other, the first connecting chamber being connected to the first stirring chamber, and the second connecting chamber being connected to the second stirring chamber; the backwash water supply assembly further includes a first backwash water supply branch pipe and a second backwash water supply branch pipe, the first backwash water supply branch pipe connecting the other end of the backwash water supply pipe with the backwash interface, and the second backwash water supply branch pipe connecting the other end of the backwash water supply pipe with the connecting chamber.

[0014] According to one embodiment of the present invention, the A material conveying component includes: a screw conveyor, the screw conveyor having an A material conveying inlet and an A material conveying outlet, the A material conveying inlet is located below the discharge port of the A material storage device and is connected to the discharge port, the A material conveying outlet is located above the mixing component and is connected to both the first A material inlet and the second A material inlet; a first A material control valve and a second A material control valve, the first A material control valve is arranged between the A material conveying outlet and the first A material inlet, and the second A material control valve is arranged between the A material conveying outlet and the second A material inlet; an A material weighing device, the A material weighing device is arranged at The bottom of the A material storage device is used to weigh the weight of the A material storage device, and the A material weighing device, the screw conveyor, the first A material control valve and the second A material control valve are all electrically connected to the control device. In S3, the control device can control the first A material control valve and the second A material control valve to be opened so as to add the second set amount of the A material into the first stirring chamber and the second stirring chamber respectively; the control device can also control only one of the first A material control valve and the second A material control valve to be opened so as to add the second set amount of the A material into only one of the first stirring chamber and the second stirring chamber.

[0015] According to one embodiment of the present invention, the B material conveying component includes: a first vacuum suction machine, the first vacuum suction machine includes a first negative pressure vacuum pump, a first vacuum silo, a first suction pipe, a first exhaust pipe and a first B material control valve, the first vacuum silo is provided with a first B material conveying inlet, a first B material conveying outlet and a first exhaust port, the first B material conveying outlet is communicated with the first B material inlet, the first suction pipe is connected between the B material storage device and the first B material conveying inlet, the first exhaust pipe connects the first negative pressure vacuum pump and the first exhaust port, and the first B material control valve is used to control the opening and closing of the first B material conveying outlet; a second vacuum suction machine, the second vacuum suction machine includes a second negative pressure vacuum pump, a second vacuum silo, a second suction pipe, a second exhaust pipe and a second B material control valve, the second vacuum silo is provided with a second B material conveying inlet, a second B material conveying outlet and a second exhaust port, the second B material conveying outlet is communicated with the second The B material inlet is connected, the second suction pipe connects the B material storage device and the second B material delivery inlet, the second exhaust pipe connects the second negative pressure vacuum pump and the second exhaust port, and the second B material control valve is used to control the opening and closing of the second B material delivery outlet; a B material weighing device, the B material weighing device is arranged at the bottom of the B material storage device to weigh the weight of the B material storage device, the B material weighing device, the first negative pressure vacuum pump and the second negative pressure vacuum pump are all electrically connected to the control device, in S4, the control device can control the first negative pressure vacuum pump and the second negative pressure vacuum pump to open so as to add the third set amount of the B material into the first stirring chamber and the second stirring chamber respectively; the control device can also control only one of the first negative pressure vacuum pump and the second negative pressure vacuum pump to open so as to add the third set amount of the B material into only one of the first stirring chamber and the second stirring chamber.

[0016] According to one embodiment of the present invention, the mixing bin is provided with an overflow port connected to the mixing chamber, the fire protection part also includes an overflow assembly, the overflow assembly includes: an overflow pipe, the overflow pipe connects the shotcrete outlet and the overflow port; a pressure relief valve and a pressure detection device for detecting the pressure at the shotcrete outlet, the pressure relief valve is arranged between the overflow pipe and the overflow port, the pressure relief valve and the pressure detection device are both electrically connected to the control device, and when the pressure value detected by the pressure detection device is greater than the set pressure value, the control device controls the pressure relief valve to open.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a three-dimensional diagram of a coal yard fire prevention and extinguishing device according to an embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the fire prevention and extinguishing device of the coal yard shown in another angle; Figure 3 yes Figure 1 A three-dimensional diagram of the fire-fighting part of the fire-fighting device for a coal yard shown in FIG. Figure 4 yes Figure 3 A cross-sectional view of the fire extinguishing part along line AA shown in FIG. Figure 5 yes Figure 3 The internal structure diagram of the fire protection and extinguishing part shown in FIG. Figure 6 yes Figure 5 A partial structural diagram of the fire protection and extinguishing part shown in ; Figure 7 yes Figure 6 A partial structural diagram of the fire protection and extinguishing part shown in ; Figure 8 is a cross-sectional view of a partial structure of a mixing assembly according to an embodiment of the present invention, wherein the switch door body is in a first position; Fig. 9 is a sectional view of a partial structure of a mixing assembly according to an embodiment of the present invention, wherein the switch door body is in the second position.

[0019] Reference numerals: Coal yard fire prevention and extinguishing device 100; fire prevention and extinguishing part 10; first mixing bin 101; first mixing chamber 101a; first water inlet 1011; first A material inlet 1012; first B material inlet 1013; first slurry outlet 1014; first slurry outlet control valve 10141; first overflow port 1015; second mixing bin 102; second mixing chamber 102a; second water inlet 1021; second A material inlet 1022; second B material inlet 1023; second slurry outlet 1024; second slurry outlet control valve 10241; second overflow port 1025; connecting bin body 103; switch door body 1031; connecting cavity 1032; first connecting cavity 10321; second connecting cavity 10322; spray pump 104; spray inlet 1041; spray outlet 1042; A material storage device 105a; silo body 105a1; feed inlet 105a11; discharge port 105a12; exhaust hole 105a13; silo legs 105a2; screw conveyor 105b1; A material delivery inlet 105b11; A material delivery outlet 105b12; A material weighing device 105b4; A material delivery tee 105b5; B material storage device 106a; first negative pressure vacuum pump 106b11; first vacuum material silo 106b12; second negative pressure vacuum pump 106b21; second vacuum silo 106b22; B material weighing device 106b3; stirring water supply pipe 1071; first stirring water supply section 10711; second stirring water supply section 10712; flow metering device 1072; first branch stirring water supply pipe 1073; first stirring water inlet control valve 1074; second branch stirring water supply pipe 1075; second stirring water inlet control valve 1076; stirring water supply tee pipe 1077; water supply control valve 1078; main water supply pipe 1079; total water supply tee pipe 10791; connecting joint 108a; first connecting Port 108a1; second connection port 108a2; third connection port 108a3; backwash interface 108a31; fourth connection port 108a4; slurry discharge control valve 108a41; first slurry outlet pipe 108b; second slurry outlet pipe 108c; backwash water supply pipe 108d1; backwash water supply control valve 108d2; first backwash water supply branch pipe 108d3; backwash three-way pipe 108d5; backwash branch control valve 108d6; first overflow pipe 1091; second overflow pipe 1092; first pressure relief valve 1093; second pressure relief valve 1094; slurry transmission pipe 109a; shotcrete control valve 109b; control device 109c; motor vehicle body 20; compartment 30; heat dissipation window 301; heat dissipation fan 302; operation window 303; door body 304. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0021] Reference below Figure 1-Figure 9 A method for preventing and extinguishing fire in a coal yard according to an embodiment of the present invention is described.

[0022] refer to Figure 1-Figure 7 As shown, the coal yard fire prevention and extinguishing method according to an embodiment of the present invention adopts a coal yard fire prevention and extinguishing device 100 to perform fire prevention and extinguishing work, and the coal yard fire prevention and extinguishing device 100 includes a motor vehicle body 20 and a fire prevention and extinguishing part 10 arranged on the motor vehicle body 20. The fire prevention and extinguishing part 10 includes: an A material storage device 105a, a B material storage device 106a, a mixing component, a stirring water supply component, an A material conveying component, a B material conveying component, a spraying pump 104, a backwashing water supply component and a control device 109c.

[0023] The A material storage device 105a is used to store A material, and the B material storage device 106a is used to store B material. The mixing component includes a mixing bin and a stirring member. A mixing chamber is defined in the mixing bin. The stirring member is rotatably disposed in the mixing chamber. The mixing bin is provided with a water inlet, an A material inlet, a B material inlet and a slurry outlet which are connected to the mixing chamber. The slurry outlet is provided with a slurry outlet control valve. The water inlet is used to add water into the mixing chamber, the A material inlet is used to add A material into the mixing chamber, the B material inlet is used to add B material into the mixing chamber, the stirring member is used to mix the materials to make slurry, and the slurry outlet is used to discharge the slurry in the mixing chamber after the slurry is made. The slurry outlet control valve is used to control the opening and closing of the slurry outlet. During the material adding and slurry making process, the slurry outlet control valve is in a closed state. When the slurry making is completed and the slurry is sprayed, the slurry outlet control valve can be controlled to open, so that the slurry in the mixing chamber can be discharged through the slurry outlet.

[0024] In the embodiments described in the present application, material A is fly ash, and material B is a powdered flame retardant chemical composite material (powdered material) for illustration. It is understandable that this cannot be used as a limitation to the present application. In some other embodiments, material A can also be a powdered material such as stone powder and bentonite, and material B can also be a liquid flame retardant material (liquid material).

[0025] The stirring water supply assembly is suitable for connecting a water source and a water inlet to quantitatively deliver water from the water source to the stirring chamber. It should be noted that the "water source" described in the present application can be arbitrarily selected according to actual needs. For example, the water source can be firefighting water in the fire prevention and extinguishing operation area. By making the water source the firefighting water in the fire prevention and extinguishing operation area, water can be directly taken at the spraying site, which is convenient and convenient to take water, which is conducive to improving the efficiency of the fire prevention and extinguishing spraying operation. Of course, the present application is not limited to this, and the water source can also be filtered flushing water, etc.

[0026] The A material conveying assembly connects the A material storage device 105a and the A material inlet to quantitatively convey the A material stored in the A material storage device 105a to the stirring chamber. The B material conveying assembly connects the B material storage device 106a and the B material inlet to quantitatively convey the B material stored in the B material storage device 106a to the stirring chamber. In other words, the A material conveying assembly can automatically add the A material to the stirring chamber quantitatively, and the B material conveying assembly can automatically add the B material to the stirring chamber quantitatively. In this way, the manual proportioning of the materials can be omitted, and there is no need to use other vehicles (such as ash tankers or forklifts) to add materials, which not only saves labor but also makes the finished slurry more consistent.

[0027] The amount of material A that can be stored in the material A storage device 105a can meet the needs of multiple pulping. In this way, after taking material from the material A silo once, it can meet the needs of multiple pulping, without the need to frequently return to the silo (fly ash silo) to take material. The amount of material B that can be stored in the material B storage device 106a can also meet the needs of multiple pulping, so there is no need to frequently add material B.

[0028] The spray pump 104 has a spray inlet 1041 and a spray outlet 1042. The spray inlet 1041 is connected to the slurry discharge control valve, and the spray outlet 1042 is suitable for connecting a spray gun or a grouting pipe. In other words, the spray inlet 1041 is connected to the slurry discharge port through the slurry discharge control valve, so that when the slurry discharge control valve is opened, the slurry in the stirring chamber can be transported toward the spray inlet 1041 through the slurry discharge port, and then the slurry is pumped from the spray inlet 1041 toward the spray outlet 1042 under the drive of the spray pump 104, and then sprayed onto the surface of the coal pile through the spray gun or injected into the coal pile through the grouting pipe, thereby realizing the fire prevention and extinguishing of the coal pile.

[0029] It is understandable that the coal yard fire prevention and extinguishing device 100 needs to go through multiple rounds of mixing, slurry making and spraying when performing fire prevention and extinguishing work. Due to the characteristics of slurry such as viscosity and easy solidification, the slurry outlet position of the mixing bin and the connecting pipeline between the slurry outlet and the spraying pump 104 are prone to blockage. In order to avoid the occurrence of this problem, it is necessary to flush the connecting pipeline between the mixing bin and the spraying pump 104 and the mixing bin in time at the end of spraying. In the prior art, when performing the flushing operation, flushing water is added from the water inlet of the mixing bin, which does not flush the residual slurry in the connecting pipeline between the mixing bin and the spraying pump 104 thoroughly, resulting in a high frequency of pipeline blockage.

[0030] In the application, the connection pipeline between the grouting inlet 1041 and the slurry discharge control valve is provided with a backwash interface. The backwash water supply assembly is suitable for connecting the water source and the backwash interface to be used for quantitatively or regularly delivering the flushing water from the downstream side of the slurry discharge port to the stirring chamber. In this way of reversely supplying water from the downstream side of the slurry discharge port to the stirring chamber for flushing, the residual slurry in the connection pipeline between the grouting inlet 1041 and the slurry discharge control valve can be flushed more cleanly and thoroughly, greatly reducing the occurrence of pipeline blockage.

[0031] It should be noted that the "water source" used to provide flushing water in the present application (i.e., the "water source" connected to the backwashing water supply assembly) can be the same as the "water source" used to provide water required for stirring and pulping (i.e., the "water source" connected to the stirring water supply assembly) described above, so as to facilitate water supply at the operation site without preparing two water source water supply pipelines. Of course, the present application is not limited to this, and the "water source" used to provide flushing water can also be different from the "water source" used to provide water required for stirring and pulping.

[0032] The control device 109c is electrically connected to the stirring element, the stirring water supply assembly, the A material conveying assembly, the B material conveying assembly, the spraying pump 104, the backwashing water supply assembly and the slurry discharge control valve. The coal yard fire prevention and extinguishing method includes the following steps: S1: Add material A to the material A storage device 105a, and add material B to the material B storage device 106a. It should be noted that the amount of material A that can be stored in the material A storage device 105a and the amount of material B that can be stored in the material B storage device 106a can both meet the needs of multiple pulping, so that frequent trips back and forth to the material bin to take materials can be avoided.

[0033] S2: The control device 109c controls the stirring and water supply assembly to add a first set amount of water into the stirring chamber. The first set amount is the amount of water required for one pulping.

[0034] S3: The control device 109c controls the A material conveying assembly to add a second set amount of A material into the stirring chamber. After the A material is added, the control device 109c controls the stirring element to stir the water and A material added into the stirring chamber for a first set stirring time to form a mixed material. The second set amount is the amount of A material required for one slurrying. The first set stirring time is the time required to stir the A material and water evenly.

[0035] S4: The control device 109c controls the B material conveying assembly to add a third set amount of B material into the stirring chamber. After the B material is added, the control device 109c controls the stirring member to stir the B material added to the stirring chamber with the mixed material formed in S3 for a second set stirring time to form the slurry required for spraying. The third set amount is the amount of B material required for one slurrying. The second set stirring time is the time required to stir the B material and the mixed material evenly.

[0036] S5: The control device 109c controls the slurry discharge control valve and the spray pump 104 to open, so as to spray the slurry formed in S4 to the fire prevention and extinguishing area to be sprayed. When the pressure at the spray outlet 1042 is less than the set pressure value, the control device 109c controls the spray pump 104 to close. Optionally, the set pressure value can be 0.001MPa. When the pressure at the spray outlet 1042 is less than the set pressure value, it means that the slurry of this round of slurrying has been sprayed.

[0037] Since the slurry is viscous and easy to solidify, after each round of spraying, the backwashing operation in the following step S6 can be performed to promptly remove the slurry remaining in multiple locations such as the inner wall of the stirring chamber, the surface of the stirring element and the connecting pipes, so as to avoid the occurrence of blockages caused by the solidification of the residual slurry.

[0038] S6: The control device 109c controls the backwash water supply component to quantitatively or regularly deliver flushing water to the stirring chamber. When the water supply amount or water supply time of the backwash water supply component reaches the set flushing water supply amount or the set flushing water supply time, the control device 109c controls the backwash water supply component to stop supplying water and controls the spray pump 104 to start, and discharges the mixed liquid of slurry and water generated during the flushing process through the spray outlet 1042, thereby completing the flushing operation of the device. It should be noted that in the process of the backwash water supply component supplying water to the stirring chamber and the spray pump 104 being turned on after the water supply is completed, the control device 109c can also control the rotation of the stirring element, so that the residual slurry in the stirring chamber and on the stirring element can be flushed more cleanly and thoroughly.

[0039] S7: Determine whether the fire prevention and extinguishing spraying work needs to be continued, that is, determine whether the fire prevention and extinguishing spraying work has been completed. If it has been completed, the spraying operation is completed; if it has not been completed, it is necessary to continue the pulping and spraying. If it needs to be continued, it is necessary to determine whether the amount of the A material remaining in the A material storage device 105a can meet the needs of the next pulping, and whether the amount of the B material remaining in the B material storage device 106a can meet the needs of the next pulping: If it can be satisfied, return to S2; if it cannot be satisfied, it is necessary to first replenish A material in the A material storage device 105a and replenish B material in the B material storage device 106a, and then return to S2 until the fire prevention and extinguishing spraying work is completed.

[0040] It should be noted that the "first set amount", "second set amount", "third set amount", "first set stirring time", "second set stirring time", "set flushing water supply time" and "set flushing water supply amount" mentioned above can be arbitrarily selected according to actual needs. Optionally, the first set amount is 1 m³, the second set amount is 1 t, the third set amount is 7 kg, the first set stirring time is 3 min, the second set stirring time is 5 min, and the set flushing water supply time is 160 s.

[0041] In addition, by setting the fire prevention and extinguishing part 10 on the motor vehicle body 20, the coal yard fire prevention and extinguishing device 100 can be freely moved during the process of adding materials, slurrying and spraying. For example, when the coal yard fire prevention and extinguishing device 100 needs to add fly ash, the coal yard fire prevention and extinguishing device 100 can be driven to the ash bin to receive ash, and then the coal yard fire prevention and extinguishing device 100 can be driven to the spraying site for slurrying and spraying. Therefore, the coal yard fire prevention and extinguishing device 100 is very flexible and convenient during use, thereby improving work efficiency, and can also greatly shorten the spraying pipeline, thereby saving costs.

[0042] Optionally, see Figure 1-Figure 7 The coal yard fire prevention and extinguishing device 100 further includes a compartment 30, and at least a part of the fire prevention and extinguishing part 10 is accommodated in the compartment 30. By providing the compartment 30, the fire prevention and extinguishing part 10 can be protected.

[0043] Optionally, a drainage ditch may be provided in the compartment 30, and rainwater may be discharged through the drainage ditch.

[0044] Optionally, see Figure 1 A heat dissipation window 301 may be further provided on the side wall of the compartment 30 , and a heat dissipation fan 302 may be provided in the heat dissipation window 301 . The heat dissipation fan 302 is used to drive the air inside and outside the compartment 30 to exchange, thereby reducing the internal temperature of the compartment 30 .

[0045] Optionally, a lighting lamp may be provided in the compartment 30 to facilitate maintenance.

[0046] Optionally, see Figure 1-Figure 2 There can be multiple operation windows 303 on the compartment 30, and each operation window 303 is provided with a door 304 for opening or closing the operation window 303, so that when it is necessary to inspect or operate the valve and other components of the fire protection part 10, the operation can be performed by opening the door 304 of the corresponding operation window 303. Or when it is necessary to dissipate heat from the fire protection part 10 located in the compartment 30, the door 304 can be opened to speed up the heat dissipation efficiency.

[0047] The size of the door 304 can be selected as needed. In some embodiments, when the door 304 is opened, the side wall of the compartment 30 is completely open, which is helpful for heat dissipation and is suitable for areas with hot climates. When the door 304 is opened, the heat dissipation is faster. In some embodiments, when the door 304 is opened, only a part of the side wall of the compartment 30 is opened, which is suitable for areas with cold climates and can ensure the heat preservation effect of the compartment 30.

[0048] Among them, the opening mode of the door body 304 can be arbitrarily selected as needed, for example, the door body 304 can be a swing door, a flip door (upward flip door or downward flip door) or a folding door. In addition, the door body 304 can also be an automatic door, such as a hydraulic door or an electric door, etc., so that there is no need to manually control the opening and closing of the door body 304, the operation is more labor-saving, and the coal yard fire prevention and extinguishing device 100 is more intelligent as a whole. Of course, the present application is not limited to this, and the door body 304 can also be a manual door, which is conducive to reducing costs. Or some of the door bodies 304 of the multiple door bodies 304 of the coal yard fire prevention and extinguishing device 100 are automatic doors, and the other door bodies 304 are manual doors. In this way, when the automatic door fails to drive and fails to open normally, the manual door can be manually opened, thereby ensuring that the fire prevention and extinguishing work of the coal yard fire prevention and extinguishing device 100 is not affected.

[0049] According to the coal yard fire prevention and extinguishing method of the embodiment of the present invention, the fire prevention and extinguishing device used can move freely, and can be connected to the slurry site for slurry making and slurry spraying after receiving the material from the silo, thereby saving the slurry spraying pipeline, and can accurately spray according to the temperature measurement of the coal pile, improve work efficiency, and save costs; in addition, the fire prevention and extinguishing device integrates material storage, feeding, stirring, slurry spraying and flushing, and one-time material collection can meet the needs of multiple slurry making, without multiple round trips to the silo to collect materials, and the slurry spraying has high continuity, and can realize automatic quantitative proportioning and adding of materials, and no other vehicles (such as ash tankers or forklifts) are required to cooperate during the material addition process, thereby not only saving labor, but also making the finished slurry more consistent. The coal yard fire prevention and extinguishing method of the embodiment of the present application can realize automatic proportioning and adding of materials, automatic stirring and slurry making, automatic slurry spraying and automatic flushing, thereby making the fire prevention and extinguishing slurry spraying construction process more intelligent and the construction process stable and reliable, the construction process is simple to operate, and at the same time, the material ratio is high in precision and the finished slurry has good consistency.

[0050] In one embodiment of the present invention, the fire prevention and extinguishing part 10 further includes a display screen, which can be used to display at least one of the weight of the A material storage device 105a, the weight of the B material storage device 106a, the amount of water added by the stirring water supply component to the stirring chamber, the amount of A material delivered by the A material conveying component to the stirring chamber, the amount of B material delivered by the B material conveying component to the stirring chamber, the amount of water supplied by the backwashing water supply component to the stirring chamber or the water supply duration, the duration of the stirring element stirring the water and A material added to the stirring chamber, the duration of the stirring element stirring the B material added to the stirring chamber and the mixed material, and the pressure value at the spraying outlet 1042. By setting up a display screen, it is convenient to understand the working progress of the coal yard fire prevention and extinguishing device 100 in real time.

[0051] Furthermore, the fire prevention and extinguishing part 10 also includes a power supply module, which has a mains mode and a battery mode, and the power supply module can switch between the mains mode and the battery mode. When the mains is powered, the mains mode is used for power supply by default, and when the mains is out of power, it will switch to the battery mode for power supply. When the coal yard fire prevention and extinguishing device 100 runs to the A material silo to add A material into the A material storage device 105a, the battery mode can be used for power supply so that the display screen displays the weight of the A material storage device 105a. In the mains mode and the battery mode, the background color of the display screen is different. For example, in the battery mode, the background color of the display screen can be green, and in the mains mode, the background color of the display screen can be blue.

[0052] Optionally, in the mains mode, the spraying power of the spraying pump 104 can be switched between low gear (e.g. 30HZ), medium gear (e.g. 40HZ) and high gear (e.g. 45HZ); in the battery mode, the spraying power of the spraying pump 104 is low gear (e.g. 30HZ). In the low gear, the power is small, the spraying amount is small, but the spraying is uniform, which is suitable for spraying in supplementary spraying or fire prevention scenarios; in the high gear, the power is large, the spraying amount is large, and the spraying is fast, which is suitable for spraying in emergency fire extinguishing scenarios.

[0053] In one embodiment of the present invention, a low liquid level detection device for detecting the liquid level in the stirring chamber is provided in the stirring chamber, and the low liquid level detection device is electrically connected to the control device 109c. In S7, execution of return to S2 also needs to satisfy: the control device 109c determines that the liquid level value detected by the low liquid level detection device is less than the set low liquid level threshold.

[0054] It should be noted that when the liquid level in the stirring chamber is less than the set low liquid level threshold, the stirring chamber can be considered to be in an empty state, that is, there is no residual flushing water in the stirring chamber. Or there is a small amount of residual flushing water in the stirring chamber, but it does not affect the next round of pulping ratio accuracy. In other words, in step S7, it is also necessary to ensure that the stirring chamber is in a low liquid level empty state before returning to step S2 for the next round of pulping.

[0055] In this way, it can be avoided that the flushing water in the mixing chamber is not completely discharged due to equipment operation failure, and the next round of pulping is directly returned to step S2, which causes the ratio of material and water during pulping to fail to meet the requirements. Optionally, the low liquid level detection device can be a pressure sensor.

[0056] Optionally, when executing S2-S7, the operation modes of the coal yard fire prevention and extinguishing device 100 include automatic mode (fully automatic), semi-automatic mode (important step reminder and confirmation operation) and single-step mode (each step requires manual confirmation). That is to say, when executing S2-S7, the automatic mode can be used to automatically execute S2-S7 in sequence; or the semi-automatic mode can be used to execute S2-S7; or the single-step mode can be used to execute S2-S7 in sequence. In the single-step mode, the instructions in the program can be executed one by one, and the operating status of the coal yard fire prevention and extinguishing device 100 can be observed. The automatic mode, semi-automatic mode and single-step mode can be switched freely during use.

[0057] In some application scenarios, the mixing component includes only one mixing chamber.

[0058] In some application scenarios, the mixing component includes multiple mixing chambers, and the slurry discharge control valve of each mixing chamber is connected to the spraying inlet 1041 of the spraying pump 104, so that multiple mixing chambers can provide spraying slurry to the spraying pump 104. In the present application, "multiple" refers to two or more, such as three, four or five. By connecting the spraying pump 104 to multiple mixing chambers, mixing and slurrying can be carried out in multiple mixing chambers at the same time; or mixing and slurrying can be carried out in only some of the multiple mixing chambers and the other mixing chambers are used for standby; or multiple mixing chambers perform mixing and slurrying alternately, which can not only meet the spraying demand of large spraying volume in emergency situations, but also avoid the inability to continuously supply spraying slurry to the spraying pump 104 due to equipment failure or pipeline blockage, thereby ensuring the continuity of the spraying work and improving the spraying efficiency.

[0059] The following is an illustrative description using two mixing chambers as an example, but it is understandable that the present application is not limited to this, and the number of mixing chambers may also be one, three, four or more.

[0060] See also Figure 1-Figure 7The mixing chamber includes two, namely, a first mixing chamber 101 and a second mixing chamber 102. Correspondingly, the mixing element also includes two, namely, a first mixing element and a second mixing element. A first mixing chamber 101a is defined in the first mixing chamber 101. The first mixing chamber 101 is provided with a first water inlet 1011, a first A material inlet 1012, a first B material inlet 1013 and a first slurry outlet 1014 which are connected to the first mixing chamber 101a. A first slurry outlet control valve 10141 is provided at the first slurry outlet 1014. The first slurry outlet control valve 10141 is connected to the spraying inlet 1041. The first mixing element is rotatably provided in the first mixing chamber 101a. That is to say, the stirring chamber formed in the first stirring chamber 101 is the first stirring chamber 101a, the water inlet, A material inlet, B material inlet and slurry outlet provided on the first stirring chamber 101 are the first water inlet 1011, the first A material inlet 1012, the first B material inlet 1013 and the first slurry outlet 1014 respectively, and the slurry outlet control valve provided at the first slurry outlet 1014 is the first slurry outlet control valve 10141.

[0061] A second stirring chamber 102a is defined in the second stirring chamber 102, and the second stirring chamber 102 is provided with a second water inlet 1021, a second A material inlet 1022, a second B material inlet 1023 and a second slurry outlet 1024 which are connected with the second stirring chamber 102a. A second slurry outlet 1024 is provided with a second slurry outlet control valve 10241, and the second slurry outlet control valve 10241 is connected to the spraying inlet 1041. The second stirring element is rotatably arranged in the second stirring chamber 102a, and the first stirring element, the second stirring element, the first slurry outlet control valve 10141 and the second slurry outlet control valve 10241 are all electrically connected to the control device 109c. That is to say, the stirring chamber formed in the second stirring chamber 102 is the second stirring chamber 102a, the water inlet, A material inlet, B material inlet and slurry outlet provided on the second stirring chamber 102 are the second water inlet 1021, the second A material inlet 1022, the second B material inlet 1023 and the second slurry outlet 1024 respectively, and the slurry outlet control valve provided at the second slurry outlet 1024 is the second slurry outlet control valve 10241.

[0062] Specifically, the first water inlet 1011 is used to add water required for pulping into the first stirring chamber 101a, the second water inlet 1021 is used to add water required for pulping into the second stirring chamber 102a, the first A material inlet 1012 is used to add A material required for pulping into the first stirring chamber 101a, the second A material inlet 1022 is used to add A material required for pulping into the second stirring chamber 102a, the first B material inlet 1013 is used to add B material required for pulping into the first stirring chamber 101a, and the second B material inlet 1023 is used to add B material required for pulping into the second stirring chamber 102a.

[0063] The first slurry outlet 1014 is used to discharge the slurry that has been slurried in the first stirring chamber 101a, and the first slurry outlet control valve 10141 is used to control the opening and closing of the first slurry outlet 1014. During the material addition and slurry making process, the first slurry outlet control valve 10141 is in a closed state; when the slurry is finished and the slurry is sprayed, the first slurry outlet control valve 10141 can be controlled to open, so that the slurry in the first stirring chamber 101a can be transported toward the spraying inlet 1041 through the first slurry outlet 1014, and then the slurry is pumped from the spraying inlet 1041 toward the spraying outlet 1042 under the drive of the spraying pump 104, and then sprayed onto the surface of the coal pile through the spray gun or injected into the coal pile through the grouting pipe. The second slurry outlet 1024 is used to discharge the slurry that has been slurried in the second stirring chamber 102a, and the second slurry outlet control valve 10241 is used to control the opening and closing of the second slurry outlet 1024. During the material adding and slurrying process, the second slurry outlet control valve 10241 is in a closed state; when the slurrying is completed and the slurry is sprayed, the second slurry outlet control valve 10241 can be controlled to open, so that the slurry in the second stirring chamber 102a can be transported toward the spraying inlet 1041 through the second slurry outlet 1024, and then the slurry is pumped from the spraying inlet 1041 toward the spraying outlet 1042 under the drive of the spraying pump 104, and then sprayed onto the surface of the coal pile through a spray gun or injected into the coal pile through a grouting pipe.

[0064] When the coal yard fire prevention and extinguishing device 100 is working, the control device 109c can control both the first stirring member and the second stirring member to start, or control only one of the first stirring member and the second stirring member to start, the control device 109c can control both the first slurry discharge control valve 10141 and the second slurry discharge control valve 10241 to be opened, or control only one of the first slurry discharge control valve 10141 and the second slurry discharge control valve 10241 to be opened; the stirring and water supply component is suitable for connecting the water source and the first water inlet 1011, and connecting the water source and the second water inlet 1021, and the stirring and water supply component can simultaneously supply water to the first stirring chamber 101a and the second stirring chamber 102a in a quantitative manner, or can only supply water to one of the first stirring chamber 101a and the second stirring chamber 102a in a quantitative manner; The A material conveying component connects the A material storage device 105a and the first A material inlet 1012, and connects the A material storage device 105a and the second A material inlet 1022. The A material conveying component can simultaneously convey the A material in a quantitative manner toward the first stirring chamber 101a and the second stirring chamber 102a, or can only convey the A material in a quantitative manner toward one of the first stirring chamber 101a and the second stirring chamber 102a; the B material conveying component connects the B material storage device 106a and the first B material inlet 1013, and connects the B material storage device 106a and the second B material inlet 1023. The B material conveying component can simultaneously convey the B material toward the first stirring chamber 101a and the second stirring chamber 102a, or can only convey the B material toward one of the first stirring chamber 101a and the second stirring chamber 102a.

[0065] Specifically, when the demand for the amount of slurry is high, such as in the case of emergency fire extinguishing in a coal yard, in step S2, the control device 109c can control the stirring and water supply component to add a first set amount of water required for slurrying to the first stirring chamber 101a and the second stirring chamber 102a respectively; in step S3, the control device 109c can control the A material conveying component to add a second set amount of A material required for slurrying to the first stirring chamber 101a and the second stirring chamber 102a respectively. After the addition of A material is completed, the control device 109c can control the first stirring member and the second stirring member to start to stir the materials in the first stirring chamber 101a and the second stirring chamber 102a to form Mixing materials; in step S4, the control device 109c can control the B material conveying assembly to add the third set amount of B material required for slurrying to the first stirring chamber 101a and the second stirring chamber 102a respectively. After the addition of B material is completed, the control device 109c controls the first stirring member and the second stirring member to continue stirring the materials in the first stirring chamber 101a and the second stirring chamber 102a respectively to form the slurry required for spraying; in step S5, the control device 109c can control the first slurry discharge control valve 10141 and the second slurry discharge control valve 10241 to be opened, and the first stirring chamber 101a and the second stirring chamber 102a simultaneously provide the spraying slurry to the spraying pump 104. That is to say, in this scenario, the first stirring chamber 101 and the second stirring chamber 102 are used for stirring and slurrying at the same time, so as to meet the slurrying demand of a large amount of spraying in an emergency.

[0066] When the demand for slurry spraying is not high, such as in the case of fire prevention or supplementary spraying in a coal yard, only one of the first mixing chamber 101 and the second mixing chamber 102 can be used for mixing and slurrying, while the other is used as a standby. The following description will take the first mixing chamber 101 being used for mixing and slurrying, while the second mixing chamber 102 is used as a standby as an example. In step S2, the control device 109c controls the stirring and water supply assembly to only add a first set amount of water required for pulping into the first stirring chamber 101a; in step S3, the control device 109c controls the A material conveying assembly to only add a second set amount of A material required for pulping into the first stirring chamber 101a. After the A material is added, the control device 109c only controls the first stirring element to start to stir the material in the first stirring chamber 101a to form a mixed material; in step S4, the control device 109c controls the B material conveying assembly to only add a third set amount of B material required for pulping into the first stirring chamber 101a. After the B material is added, the control device 109c only controls the first stirring element to continue stirring the material in the first stirring chamber 101a to form the slurry required for spraying; in step S5, the control device 109c only controls the first slurry discharge control valve 10141 to open, and only the first stirring chamber 101a provides spraying slurry toward the spraying pump 104.

[0067] Optionally, the first slurry discharge control valve 10141 and the second slurry discharge control valve 10241 are both electric butterfly valves, which are small in size and easy to install. In some other embodiments, the first slurry discharge control valve 10141 and the second slurry discharge control valve 10241 can also be electric ball valves.

[0068] In one embodiment of the present invention, the first stirring chamber 101a and the second stirring chamber 102a can be switched between a connected state in which they are connected to each other and a disconnected state in which they are isolated from each other. That is to say, the first stirring chamber 101a and the second stirring chamber 102a can be connected to each other or isolated from each other. When the first stirring chamber 101a and the second stirring chamber 102a are both used for stirring and pulping, in the process of adding water, material A and material B required for pulping into the first stirring chamber 101a and the second stirring chamber 102a, and in the process of stirring and pulping, the first stirring chamber 101a and the second stirring chamber 102a can be in a connected state in which they are connected to each other. In this way, the first stirring chamber 101a and the second stirring chamber 102a can share the pulping raw materials, thereby avoiding the problem of uneven distribution of the pulping raw materials in the first stirring chamber 101a and the second stirring chamber 102a, thereby improving the ratio accuracy of each component in the slurry prepared in each stirring chamber. When only one of the first stirring chamber 101a and the second stirring chamber 102a is used to stir the slurry and the other is in standby, or the first stirring chamber 101a and the second stirring chamber 102a are alternately used to make slurry, the first stirring chamber 101a and the second stirring chamber 102a can be in a disconnected state isolated from each other.

[0069] For further information, see Figure 8-Figure 9 The mixing assembly further includes a connecting chamber 103 and a switch door 1031. The connecting chamber 103 is connected between the first mixing chamber 101 and the second mixing chamber 102. A connecting chamber 1032 is defined in the connecting chamber 103. The connecting chamber 1032 is connected to both the first mixing chamber 101a and the second mixing chamber 102a. In other words, the connecting chamber 1032 is connected to the first mixing chamber 101a, and the connecting chamber 1032 is also connected to the second mixing chamber 102a. In this way, the first mixing chamber 101a and the second mixing chamber 102a can be connected to each other through the connecting chamber 1032.

[0070] The switch door body 1031 is movably disposed on the connection chamber body 103 between a first position and a second position. Figure 8-Figure 9 As shown in FIG, the switch door body 1031 is pluggable and arranged on the connection compartment body 103. When the switch door body 1031 is in the first position (such as Figure 8 ), the first stirring chamber 101a and the second stirring chamber 102a can be connected through the connecting chamber; when the switch door body 1031 is in the second position (as shown in Fig. 9), the switch door body 1031 separates the connecting chamber 1032 into a first connecting chamber 10321 and a second connecting chamber 10322 which are not connected to each other. The first connecting chamber 10321 is connected to the first stirring chamber 101a, and the second connecting chamber 10322 is connected to the second stirring chamber 102a. The first stirring chamber 101a and the second stirring chamber 102a are not connected to each other.

[0071] For further information, see Figure 4-Figure 5 The A material conveying assembly includes a screw conveyor 105b1, a first A material control valve (not shown), a second A material control valve (not shown) and an A material weighing device 105b4. The screw conveyor 105b1 has an A material conveying inlet 105b11 and an A material conveying outlet 105b12. The A material conveying inlet 105b11 is located below the discharge port 105a12 of the A material storage device 105a and is connected to the discharge port 105a12. The A material conveying outlet 105b12 is located above the stirring assembly and is connected to both the first A material inlet 1012 and the second A material inlet 1022. The first A material control valve is disposed between the A material conveying outlet 105b12 and the first A material inlet 1012, and the second A material control valve is disposed between the A material conveying outlet 105b12 and the second A material inlet 1022.

[0072] That is to say, the A material delivery outlet 105b12 and the first A material inlet 1012 are connected through the first A material control valve, so that the first A material control valve can control the on-off between the A material delivery outlet 105b12 and the first A material inlet 1012. When it is necessary to add A material into the first stirring chamber 101a, the first A material control valve is opened, and when it is not necessary to add A material into the first stirring chamber 101a, the first A material control valve is closed. The A material delivery outlet 105b12 and the second A material inlet 1022 are connected through the second A material control valve, so that the second A material control valve can control the on-off between the A material delivery outlet 105b12 and the second A material inlet 1022. When it is necessary to add A material into the second stirring chamber 102a, the second A material control valve is opened, and when it is not necessary to add A material into the second stirring chamber 102a, the second A material control valve is closed.

[0073] In some application scenarios, when materials need to be added to both the first stirring chamber 101a and the second stirring chamber 102a for slurrying, the first A material control valve and the second A material control valve are controlled to be opened, so that the screw conveyor 105b1 can transport A material into the first stirring chamber 101a and the second stirring chamber 102a at the same time; in some application scenarios, when only materials need to be added to the first stirring chamber 101a for slurrying, the first A material control valve is controlled to be opened and the second A material control valve is closed, so that the screw conveyor 105b1 can only transport A material into the first stirring chamber 101a; in some application scenarios, when only materials need to be added to the second stirring chamber 102a for slurrying, the first A material control valve is controlled to be closed and the second A material control valve is opened, so that the screw conveyor 105b1 can only transport A material into the second stirring chamber 102a.

[0074] The first A material control valve and the second A material control valve are both electrically connected to the control device 109c, that is, the first A material control valve is electrically connected to the control device 109c, and the second A material control valve is also electrically connected to the control device 109c. In this way, the control device 109c can control the opening and closing of the first A material control valve and the second A material control valve respectively according to the application scenario.

[0075] Optionally, see Figure 5 The A material delivery outlet 105b12, the first A material control valve and the second A material control valve are connected through the A material delivery three-way pipe 105b5, which can simplify the connection structure between the A material delivery outlet 105b12 and the first A material control valve and the second A material control valve. The overall structure is simple, neat and beautiful.

[0076] From the above, it can be seen that through the cooperation between the screw conveyor 105b1, the first A material control valve and the second A material control valve, one screw conveyor 105b1 can be used to realize the conveying and adding of A material in multiple stirring chambers in multiple application scenarios, thereby reducing costs.

[0077] For further information, please refer to Figure 4-Figure 5 , the material A weighing device 105b4 is arranged at the bottom of the material A storage device 105a to weigh the weight of the material A storage device 105a, and the material A weighing device 105b4 is electrically connected to the screw conveyor 105b1. That is to say, the material A weighing device 105b4 and the screw conveyor 105b1 are both electrically connected to the control device 109c of the coal yard fire prevention and extinguishing device 100, and the control device 109c controls the start and stop of the screw conveyor 105b1 according to the weight change of the material A storage device 105a detected by the material A weighing device 105b4, thereby realizing the quantitative transportation of the material A and eliminating the need for manual weighing of the material. Optionally, the material A weighing device 105b4 can be a weighing sensor.

[0078] Please continue reading Figure 4-Figure 5 The A material storage device 105a can be a storage bin, and the A material storage device 105a includes a bin body 105a1 and a bin leg 105a2. The bin body 105a1 defines an A material storage cavity for storing A material, and a feed port 105a11 and a discharge port 105a12 are respectively arranged on the top wall and the bottom wall of the bin body 105a1. The bin leg 105a2 is used to support the bin body 105a1, and the A material weighing device 105b4 is arranged at the bottom of the bin leg 105a2. An exhaust hole 105a13 is arranged on the top wall of the bin body 105a1, so that when adding fly ash into the storage bin, the exhaust hole 105a13 can be used to balance the air pressure inside and outside the storage bin, so as to avoid a large amount of dust generated at the feed port 105a11 when adding fly ash. The A material storage device 105a may have an overload alarm function, thereby preventing the A material storage device 105a from being overfilled and overflowing to cause environmental pollution.

[0079] Optionally, the storage bin is provided with a bin wall vibrator (not shown) to drive the fly ash in the storage bin into the screw conveyor 105b1 through the discharge port 105a12, so as to avoid the fly ash being transported poorly due to blockage, agglomeration, etc. The bin wall vibrator can be an electric vibrator or a pneumatic air hammer. The bin wall vibrator is electrically connected to the screw conveyor 105b1. When the screw conveyor 105b1 is started, the bin wall vibrator is also started; when the screw conveyor is turned off, the bin wall vibrator is also turned off. In other words, the bin wall vibrator and the screw conveyor are linked.

[0080] As can be seen from the above, in the above embodiment, the screw conveyor 105b1 and the material A weighing device 105b4 cooperate to achieve quantitative ash addition. Of course, the present application is not limited to this. In some other embodiments, it can be achieved by pneumatic conveying and the material A weighing device 105b4 cooperate.

[0081] See also Figure 1-Figure 7 The B material conveying assembly may include a first vacuum suction machine, a second vacuum suction machine and a B material weighing device 106b3. The first vacuum suction machine includes a first negative pressure vacuum pump 106b11, a first vacuum silo 106b12, a first suction pipe (not shown), a first air extraction pipe (not shown) and a first B material control valve. The first vacuum silo 106b12 is provided with a first B material conveying inlet, a first B material conveying outlet and a first air extraction port. The first B material conveying outlet is connected to the first B material inlet 1013. The first suction pipe is connected to the B material storage device 106a and the first B material conveying inlet. The first air extraction pipe is connected to the first negative pressure vacuum pump 106b11 and the first air extraction port. The first B material control valve is used to control the opening and closing of the first B material conveying outlet.

[0082] The second vacuum suction machine includes a second negative pressure vacuum pump 106b21, a second vacuum silo 106b22, a second suction pipe (not shown), a second exhaust pipe (not shown) and a second B material control valve. The second vacuum silo 106b22 is provided with a second B material conveying inlet, a second B material conveying outlet and a second exhaust port. The second B material conveying outlet is communicated with the second B material inlet 1023. The second suction pipe is connected to the B material storage device 106a and the second B material conveying inlet. The second exhaust pipe is connected to the second negative pressure vacuum pump 106b21 and the second exhaust port. The second B material control valve is used to control the opening and closing of the second B material conveying outlet.

[0083] The B material weighing device 106b3 is arranged at the bottom of the B material storage device 106a to weigh the weight of the B material storage device 106a, and the B material weighing device 106b3 is electrically connected to the first negative pressure vacuum pump 106b11 and the second negative pressure vacuum pump 106b21. That is to say, the B material weighing device 106b3 is electrically connected to the first negative pressure vacuum pump 106b11, and the B material weighing device 106b3 is also electrically connected to the second negative pressure vacuum pump 106b21. Specifically, the B material weighing device 106b3, the first negative pressure vacuum pump 106b11 and the second negative pressure vacuum pump 106b21 can all be electrically connected to the control device 109c of the coal yard fire prevention and extinguishing device 100, and the control device 109c controls the start and stop of the first negative pressure vacuum pump 106b11 and the second negative pressure vacuum pump 106b21 according to the signal fed back by the B material weighing device 106b3. For example, when the control device 109c receives feedback from the B material weighing device 106b3 that the weight change of the B material storage device 106a reaches the set required amount, the control device 109c controls the first negative pressure vacuum pump 106b11 and the second negative pressure vacuum pump 106b21 to turn off. Optionally, the B material weighing device 106b3 can be a subtraction scale.

[0084] The first negative pressure vacuum pump 106b11 evacuates air through the first exhaust pipe so that the first B material conveying inlet is in a negative pressure state, so that the B material stored in the B material storage device 106a is sucked into the first vacuum silo 106b12 through the first suction pipe, and gas and material are separated in the first vacuum silo 106b12. The separated material (B material) enters the first stirring chamber 101a through the first B material conveying outlet. Optionally, the first B material control valve may include a first counterweight and a first blocking plate. When the first negative pressure vacuum pump 106b11 is working, the first counterweight drives the first blocking plate to block the first B material delivery outlet, a vacuum is formed in the first vacuum silo 106b12, and the B material stored in the B material storage device 106a is sucked into the first vacuum silo 106b12 through the first suction pipe. When the weight change of the B material storage device 106a fed back by the B material weighing device 106b3 reaches a set demand, the control device 109c controls the first negative pressure vacuum pump 106b11 to close. At this time, the B material sucked into the first vacuum silo 106b12 will drive the first blocking plate to open the first B material delivery outlet, and the B material in the first vacuum silo 106b12 will enter the first stirring chamber 101a through the first B material delivery outlet and the first B material inlet 1013 in turn, thereby realizing the quantitative addition of B material in the first stirring chamber 101a.

[0085] Similarly, the second negative pressure vacuum pump 106b21 evacuates air through the second exhaust pipe so that the second B material conveying inlet is in a negative pressure state, so that the B material stored in the B material storage device 106a is sucked into the second vacuum silo 106b22 through the second suction pipe, and the gas and material are separated in the second vacuum silo 106b22, and the separated material (B material) enters the second stirring chamber 102a through the second B material conveying outlet. Optionally, the second B material control valve may include a second counterweight block and a second blocking plate. When the second negative pressure vacuum pump 106b21 is working, the second counterweight block drives the second blocking plate to block the second B material delivery outlet, and a vacuum is formed in the second vacuum silo 106b22. The B material stored in the B material storage device 106a is sucked into the second vacuum silo 106b22 through the second suction pipe. When the weight change of the B material storage device 106a fed back by the B material weighing device 106b3 reaches the set demand, the control device 109c controls the second negative pressure vacuum pump 106b21 to close. At this time, the B material sucked into the second vacuum silo 106b22 will drive the second blocking plate to open the second B material delivery outlet. The B material in the second vacuum silo 106b22 will enter the second stirring chamber 102a through the second B material delivery outlet and the second B material inlet 1023 in turn, thereby realizing the quantitative addition of B material in the second stirring chamber 102a.

[0086] Optionally, the B material storage device 106a can be connected to the first B material conveying inlet and the second B material conveying inlet through a B material conveying tee pipe, so that the overall structure of the coal yard fire prevention and extinguishing device 100 is simple and neat, and easy to maintain.

[0087] It can be understood that the first negative pressure vacuum pump 106b11 and the second negative pressure vacuum pump 106b21 can work at the same time, or only one of them can work. For example, when material B needs to be added to both the first stirring chamber 101a and the second stirring chamber 102a for pulping, both the first negative pressure vacuum pump 106b11 and the second negative pressure vacuum pump 106b21 work; when only the first stirring chamber 101a needs to add material B for pulping, the first negative pressure vacuum pump 106b11 works, and the second negative pressure vacuum pump 106b21 does not work; when only the second stirring chamber 102a needs to add material B for pulping, the first negative pressure vacuum pump 106b11 does not work, and the second negative pressure vacuum pump 106b21 works.

[0088] Of course, the present application is not limited to this. For example, in some other embodiments, the B material conveying component can also include an air amplifier, an air compressor, a B material control valve and a B material weighing device 106b3. The air amplifier has a B material inlet end, a B material outlet end and an ejection end. The air compressor is connected to the ejection end to deliver high-pressure ejection gas toward the air amplifier. The B material inlet end is connected to the B material storage device 106a, and the B material outlet end is connected to the first B material inlet 1013 and the second B material inlet 1023. That is to say, the B material outlet end is connected to the first B material inlet 1013, and the B material outlet end is also connected to the second B material inlet 1023.

[0089] Under the induced action of the high-pressure induced gas, the air amplifier can drive the B material in the B material storage device 106a to enter the air amplifier from the B material inlet end and flow out of the air amplifier through the B material outlet end. The B material flowing out of the B material outlet end can enter the first stirring chamber 101a and the second stirring chamber 102a through the first B material inlet 1013 and the second B material inlet 1023 respectively.

[0090] Optionally, the B material outlet end can be connected to the first B material inlet 1013 and the second B material inlet 1023 through a three-way structure, thereby realizing the connection between the B material outlet end and the first B material inlet 1013, and the connection between the B material outlet end and the second B material inlet 1023. The connection structure is simple, thereby simplifying the overall structure of the coal yard fire protection and extinguishing device 100.

[0091] Furthermore, in order to realize that the coal yard fire prevention and extinguishing device 100 can switch between a single-chamber pulping mode (only one of the first mixing chamber 101 and the second mixing chamber 102 is pulping and the other is on standby) and a double-chamber pulping mode (the first mixing chamber 101 and the second mixing chamber 102 are pulping at the same time), the three-way structure connecting the B material outlet end, the first B material inlet 1013 and the second B material inlet 1023 can be a three-way reversing valve (for example, a three-way ball valve). In this way, by controlling the three-way reversing valve, it can be achieved that the B material outlet end is connected with both the first B material inlet 1013 and the second B material inlet 1023 to meet the requirements of the double-chamber pulping mode, or the B material outlet end is only connected with one of the first B material inlet 1013 and the second B material inlet 1023 to meet the requirements of the single-chamber pulping mode.

[0092] The B material control valve is disposed between the B material inlet and the B material storage device 106a to control the connection between the B material inlet and the B material storage device 106a. Optionally, the B material control valve is disposed at the discharge port of the B material storage device 106a to control the opening and closing of the discharge port of the B material storage device 106a, thereby controlling the connection between the B material inlet and the B material storage device 106a by controlling the opening and closing of the discharge port of the B material storage device 106a. Specifically, when the B material control valve is opened, the outlet of the B material storage device 106a is opened, the B material storage device 106a is connected with the B material inlet end, and the B material stored in the B material storage device 106a can enter the air amplifier through the B material inlet end; when the B material control valve is closed, the outlet of the B material storage device 106a is blocked, the B material storage device 106a is not connected with the B material inlet end, and the B material stored in the B material storage device 106a cannot enter the air amplifier through the B material inlet end.

[0093] The B material weighing device 106b3 is arranged at the bottom of the B material storage device 106a to weigh the weight of the B material storage device 106a. The B material weighing device 106b3 is electrically connected to the air compressor and the B material control valve, that is, the B material weighing device 106b3 is electrically connected to the air compressor, and the B material weighing device 106b3 is also electrically connected to the B material control valve. Specifically, the B material weighing device 106b3, the air compressor and the B material control valve can all be electrically connected to the control device 109c of the coal yard fire prevention and extinguishing device 100, and the control device 109c controls the opening and closing of the air compressor and the B material control valve according to the weight change of the B material storage device 106a fed back by the B material weighing device 106b3.

[0094] Optionally, when the weight change of the B material storage device 106a fed back by the B material weighing device 106b3 reaches the set demand, the control device 109c can first control the B material control valve to close, and then delay for a certain time (such as 10s or 15s, etc.) to control the air compressor to close so that the supply of high-pressure induced gas to the air amplifier is disconnected.

[0095] When the weight change of the B material storage device 106a fed back by the B material weighing device 106b3 meets the pulping demand, the B material control valve is immediately controlled to close, thereby preventing excess B material from entering the pipeline; in addition, the control device 109c delays the control of the air compressor to close, thereby preventing material from accumulating in the pipeline. By combining the two, the ratio accuracy between the pulping material components can be better guaranteed, and the best fire protection performance of the spraying slurry can be guaranteed.

[0096] In the above embodiment, the quantitative addition of material B in the first stirring chamber 101a and the second stirring chamber 102a is achieved through the cooperation between the air amplifier, the air compressor, the material B control valve and the material B weighing device 106b3, and during the addition of material B, material B is added gradually, thereby reducing the risk of material B agglomeration, thereby making the material mixing more uniform during the pulping process.

[0097] In some other embodiments, the B material conveying component may also use a screw conveying method (such as a soft screw conveying method) to convey the B material stored in the B material storage device 106a to the first stirring chamber 101a and the second stirring chamber 102a.

[0098] When material B is a liquefied material, the material B delivery component further includes a liquid delivery pump, a flow meter, and a control valve, and the liquid delivery pump, the flow meter, and the control valve cooperate to achieve quantitative addition of liquid material B. Alternatively, in other embodiments, the material B delivery component further includes a metering pump, and the metering pump is used to achieve quantitative addition of liquid material B.

[0099] In one embodiment of the present invention, see Figure 4-Figure 7 The stirring water supply assembly includes a stirring water supply pipe 1071, a flow metering device 1072, a first branch stirring water supply pipe 1073, a first stirring water inlet control valve 1074, a second branch stirring water supply pipe 1075 and a second stirring water inlet control valve 1076. Optionally, the flow metering device 1072 may be a flow meter or a metering pump.

[0100] The stirring water supply pipe 1071 includes a first stirring water supply section 10711 and a second stirring water supply section 10712. The flow metering device 1072 is connected between the first stirring water supply section 10711 and the second stirring water supply section 10712. The end of the first stirring water supply section 10711 away from the flow metering device 1072 is suitable for connecting to a water source. One end of the first branch stirring water supply pipe 1073 is connected to the end of the second stirring water supply section 10712 away from the flow metering device 1072. The other end of the first branch stirring water supply pipe 1073 is connected to the first water inlet 1011. The first stirring water inlet control valve 1074 is provided between the other end of the first branch stirring water supply pipe 1073 and the first water inlet 1011. One end of the second branch stirring water supply pipe 1075 is connected to the end of the second stirring water supply section 10712 away from the flow metering device 1072, and the other end of the second branch stirring water supply pipe 1075 is connected to the second water inlet 1021, and the second stirring water inlet control valve 1076 is arranged between the other end of the second branch stirring water supply pipe 1075 and the second water inlet 1021. In this way, the water at the water source passes through the first stirring water supply section 10711, the flow metering device 1072 and the second stirring water supply section 10712 in sequence and then is divided into two paths. One path enters the first branch stirring water supply pipe 1073. When the first stirring water inlet control valve 1074 is opened, the water entering the first branch stirring water supply pipe 1073 can enter the first stirring chamber 101a through the first water inlet 1011; the other path enters the second branch stirring water supply pipe 1075. When the second stirring water inlet control valve 1076 is opened, the water entering the second branch stirring water supply pipe 1075 can enter the second stirring chamber 102a through the second water inlet 1021.

[0101] The flow metering device 1072 is electrically connected to the first stirring water inlet control valve 1074 and the second stirring water inlet control valve 1076, that is, the flow metering device 1072 is electrically connected to the first stirring water inlet control valve 1074, and the flow metering device 1072 is also electrically connected to the second stirring water inlet control valve 1076, and the on-off of the first stirring water inlet control valve 1074 and the second stirring water inlet control valve 1076 is controlled by the flow signal detected by the flow metering device 1072. Specifically, the flow metering device 1072, the first stirring water inlet control valve 1074 and the second stirring water inlet control valve 1076 are all electrically connected to the control device 109c of the coal yard fire prevention and extinguishing device 100, and the control device 109c controls the opening and closing of the first stirring water inlet control valve 1074 and the second stirring water inlet control valve 1076 according to the water flow detected by the flow metering device 1072.

[0102] Optionally, the first stirring water inlet control valve 1074 and the second stirring water inlet control valve 1076 are both electric butterfly valves, which are small in size and easy to install. In some other embodiments, the first stirring water inlet control valve 1074 and the second stirring water inlet control valve 1076 can also be electric ball valves.

[0103] It should be noted that the opening and closing of the first stirring water inlet control valve 1074 and the second stirring water inlet control valve 1076 are not only controlled by the water flow detected by the flow metering device 1072, but are also related to the working mode of the mixing component. When the mixing component is only stirring and slurrying in the first stirring chamber 101a, the opening and closing of the second stirring water inlet control valve 1076 is not affected by the water flow signal detected by the flow metering device 1072. The second stirring water inlet control valve 1076 is always in a closed state, and the opening and closing of the first stirring water inlet control valve 1074 is controlled by the water flow detected by the flow metering device 1072; when the mixing component is When stirring and slurrying work is carried out only in the second stirring chamber 102a, the first stirring water inlet control valve 1074 is not affected by the water flow signal detected by the flow metering device 1072, and the first stirring water inlet control valve 1074 is always in a closed state, and the opening and closing of the second stirring water inlet control valve 1076 is controlled by the water flow detected by the flow metering device 1072; when stirring and slurrying work is carried out in both the first stirring chamber 101a and the second stirring chamber 102a in the mixing assembly, the opening and closing of the first stirring water inlet control valve 1074 and the second stirring water inlet control valve 1076 are controlled by the water flow detected by the flow metering device 1072.

[0104] Optionally, see Figure 6-Figure 7 One end of the second stirring water supply section 10712 away from the flow metering device 1072 is connected to the first branch stirring water supply pipe 1073 and the second branch stirring water supply pipe 1075 through a stirring water supply three-way pipe 1077.

[0105] Optionally, see Figure 6-Figure 7The mixing water supply assembly also includes a water supply control valve 1078, the inlet end of the water supply control valve 1078 is suitable for connecting to a water source, and the outlet end of the water supply control valve 1078 is connected to the end of the first mixing water supply section 10711 away from the flow metering device 1072. That is to say, the connection and disconnection between the water source and the first mixing water supply section 10711 is controlled by the water supply control valve 1078. The water supply control valve 1078 can be a ball valve with a simple structure, convenient operation and low cost. When water supply is not required, the water supply control valve 1078 is in a closed state; when water supply is required, the inlet end of the water supply control valve 1078 is first connected to a water source pipeline (such as a fire water pipe), and then the water supply control valve 1078 is opened to realize water supply; after the water supply is completed, the water supply control valve 1078 is closed, and then the connection between the water source pipeline (such as a fire water pipe) and the water supply control valve 1078 is removed, and the coal yard fire prevention and extinguishing device 100 can automatically walk to perform spraying operations.

[0106] The stirring and water supply assembly according to the above embodiment of the present invention has a simple structure and is convenient for installation and maintenance.

[0107] In one embodiment of the present invention, a high liquid level detection device for detecting the liquid level in the stirring chamber (the first stirring chamber 101 and the second stirring chamber 102) is also provided in the stirring chamber (the first stirring chamber 101a and the second stirring chamber 102a), and the high liquid level detection device is electrically connected to the stirring water inlet control valve (the first stirring water inlet control valve 1074 and the second stirring water inlet control valve 1076) through the control device 109c. In other words, the high liquid level detection device is electrically connected to the control device 109c, and the stirring water inlet control valve (the first stirring water inlet control valve 1074 and the second stirring water inlet control valve 1076) is also electrically connected to the control device 109c. When the high liquid level detection device detects that the liquid level value in the stirring chamber (the first stirring chamber 101a and the second stirring chamber 102a) is greater than the high liquid level threshold, the control device 109c controls the stirring water inlet control valve (the first stirring water inlet control valve 1074 and the second stirring water inlet control valve 1076) to be closed. It should be noted that when the liquid level value in the stirring chamber (first stirring chamber 101a, second stirring chamber 102a) is greater than the high liquid level threshold, it means that the liquid level height in the stirring chamber (first stirring chamber 101a, second stirring chamber 102a) has exceeded the water level height required for pulping.

[0108] By arranging a high liquid level detection device for detecting the liquid level in the stirring chamber (the first stirring chamber 101a, the second stirring chamber 102a) in the stirring chamber (the first stirring chamber 101, the second stirring chamber 102), when the flow metering device 1072 fails, a signal can be fed back to the control device 109c in time, and the control device 109c controls the stirring water inlet control valve (the first stirring water inlet control valve 1074, the second stirring water inlet control valve 1076) to close according to the signal fed back by the high liquid level detection device, thereby preventing the stirring water supply component from continuously delivering stirring water to the stirring chamber (the first stirring chamber 101a, the second stirring chamber 102a). Optionally, the second liquid level detection device can also be a pressure sensor.

[0109] In some embodiments of the present invention, see Figure 6-Figure 7 The connection pipeline between the shotcrete inlet 1041 and the slurry discharge control valve includes a connection joint 108a, a first slurry discharge pipe 108b and a second slurry discharge pipe 108c. The connection joint 108a includes a first connection port 108a1, a second connection port 108a2 and a third connection port 108a3 which are connected to each other. The third connection port 108a3 is connected to the shotcrete inlet 1041, and a backwash interface 108a31 is provided on the side wall of the third connection port 108a3. The first slurry discharge pipe 108b connects the first slurry discharge control valve 10141 and the first connection port 108a1, and the second slurry discharge pipe 108c connects the second slurry discharge control valve 10241 and the second connection port 108a2, thereby realizing the communication between the first slurry discharge control valve 10141 and the shotcrete inlet 1041, and the communication between the second slurry discharge control valve 10241 and the shotcrete inlet 1041. The backwash water supply assembly includes a backwash water supply pipe 108d1 and a backwash water supply control valve 108d2, one end of the backwash water supply pipe 108d1 is suitable for connecting to a water source, the other end of the backwash water supply pipe 108d1 is connected to the backwash interface 108a31, and the backwash water supply control valve 108d2 is suitable for being arranged between one end of the backwash water supply pipe 108d1 and the water source. The backwash water supply control valve 108d2 is electrically connected to the control device 109c, and the opening and closing of the backwash water supply control valve 108d2 is controlled by the control device 109c. The backwash water supply assembly may also include a timing device, which is used to measure the duration of the backwash water supply control valve 108d2 being opened, and the timing device is electrically connected to the control device, so that the control device can control the opening and closing of the backwash water supply control valve 108d2 according to whether the time signal fed back by the timing device reaches the set duration. Alternatively, the backwash water supply assembly may further include a flow meter, which is used to detect the flow rate of water passing through the backwash water supply pipe 108d1. The flow meter is electrically connected to the control device, so that the control device can control the opening and closing of the backwash water supply control valve 108d2 according to whether the flow signal detected by the flow meter reaches the set flow rate. Optionally, the backwash water supply control valve 108d2 is a disc-type electric valve, which is easy to disassemble and assemble.

[0110] Specifically, when flushing is required, the backwash water supply control valve 108d2 is opened, and the water at the water source enters the third connection port 108a3 of the connection joint 108a through the backwash water supply pipe 108d1 and the backwash interface 108a31, and then is divided into two paths, one of which enters the first slurry outlet pipe 108b and can enter the first stirring chamber 101a through the first slurry outlet pipe 108b, and the other enters the second slurry outlet pipe 108c and can enter the second stirring chamber 102a through the second slurry outlet pipe 108c. During this process, the first stirring member and the second stirring member can also rotate in coordination. When the water supply of the backwash water supply pipe 108d1 reaches the set time or the water supply flow reaches the set flow, the backwash water supply control valve 108d2 can be closed to stop the water supply. Then the spray pump 104 is turned on to discharge the mixed liquid of slurry and water generated during the flushing process through the spray outlet 1042, thereby completing the flushing operation of the device.

[0111] As can be seen from the above, in the present application, the backwash interface 108a31 is arranged on the side wall of the third connection port 108a3. During the water supply process, one way of flushing water is reversely fed into the first stirring chamber 101a from the downstream end of the first slurry outlet 1014 via the first slurry outlet pipe 108b, and similarly, another way of flushing water is reversely fed into the second stirring chamber 102a from the downstream end of the second slurry outlet 1024 via the second slurry outlet pipe 108c. Through this reverse water supply method, during the flushing process, the high-pressure water flow can have a better flushing effect on the first slurry outlet pipe 108b and the second slurry outlet pipe 108c, and the flushing is more thorough, which greatly reduces the occurrence of pipeline blockage problems.

[0112] Optionally, see Figure 7 The connection joint 108a also includes a fourth connection port 108a4 connected to the first connection port 108a1, the second connection port 108a2 and the third connection port 108a3. The fourth connection port 108a4 forms a slurry discharge port, and the fourth connection port 108a4 is provided with a slurry discharge control valve 108a41. By providing the slurry discharge port, when the spray pump 104 fails, the slurry discharge control valve 108a41 can be opened to discharge the slurry in the first stirring chamber 101a, the first slurry discharge pipe 108b, the second stirring chamber 102a and the second slurry discharge pipe 108c in time, so as to avoid the slurry solidifying in the device, and at the same time, it can also facilitate maintenance. Optionally, the slurry discharge control valve 108a41 can be a ball valve, which is simple to operate and low in cost.

[0113] Furthermore, a slurry discharge port may also be provided on the first stirring chamber 101, and the slurry discharge port provided on the first stirring chamber 101 is connected to the first stirring chamber 101a, and a slurry discharge control valve 108a41 for controlling the opening and closing of the slurry discharge port is also provided at the slurry discharge port; similarly, a slurry discharge port may also be provided on the second stirring chamber 102, and the slurry discharge port provided on the second stirring chamber 102 is connected to the second stirring chamber 102a, and a slurry discharge control valve 108a41 for controlling the opening and closing of the slurry discharge port is also provided at the slurry discharge port.

[0114] Optionally, the slurry discharge port provided on the first mixing chamber 101 is located on the bottom wall of the first mixing chamber 101 ; the slurry discharge port provided on the second mixing chamber 102 is located on the bottom wall of the second mixing chamber 102 .

[0115] By setting slurry discharge ports on the first stirring chamber 101 and the second stirring chamber 102, and opening the corresponding slurry discharge control valve 108a41, the slurry in the first stirring chamber 101 and the second stirring chamber 102 can be directly discharged through the slurry discharge ports formed on the first stirring chamber 101 and the second stirring chamber 102, without passing through the first slurry discharge control valve 10141 and the first slurry discharge pipe 108b, the second slurry discharge control valve 10241 and the second slurry discharge pipe 108c. In this way, not only can the slurry in the first stirring chamber 101 and the second stirring chamber 102 be discharged more timely, but also it can be avoided that the slurry cannot be discharged in time due to the failure of the first slurry discharge control valve 10141 and the second slurry discharge control valve 10241 to open.

[0116] Optionally, a slurry discharge port is provided on the first mixing chamber 101 and the second mixing chamber 102, and a slurry discharge port (i.e., the fourth connection port 108a4) is also provided on the above-mentioned connecting joint 108a. In this way, there are more slurry discharge paths and the discharge efficiency is faster. At the same time, it can also avoid the slurry being unable to be discharged in time due to the failure of the first slurry discharge control valve 10141 and the second slurry discharge control valve 10241 to open.

[0117] Of course, the present application is not limited to this. In some other embodiments, the slurry discharge port can also be formed only on the first mixing chamber 101 and the second mixing chamber 102, and the slurry discharge port is not set on the above-mentioned connecting joint 108a, that is, the connecting joint 108a does not include the above-mentioned fourth connecting port 108a4.

[0118] In one embodiment of the present invention, see Figure 7The fire prevention and extinguishing part 10 further includes a main water supply pipe 1079, one end of which is suitable for connecting to a water source, and the other end of the main water supply pipe 1079 is connected to both the backwash water supply control valve 108d2 and the end of the first stirring water supply section 10711 away from the flow metering device 1072. In other words, the other end of the main water supply pipe 1079 is connected to the backwash water supply control valve 108d2, so that the backwash water supply control valve 108d2 and the water source are connected through the main water supply pipe 1079; the other end of the main water supply pipe 1079 is also connected to the end of the first stirring water supply section 10711 away from the flow metering device 1072, so that the water source and the first stirring water supply section 10711 are also connected through the main water supply pipe 1079. That is to say, the water source can be divided into two paths after passing through the main water supply pipe 1079, one of which flows to the stirring water supply pipe 1071, and the other flows to the backwashing water supply pipe 108d1. In this way, the water source can be supplied to the stirring water supply pipe 1071 and the backwashing water supply pipe 108d1 at the same time through the main water supply pipe 1079, thereby simplifying the overall pipeline connection of the coal yard fire protection and extinguishing device 100, facilitating maintenance and reducing costs.

[0119] Optionally, see Figure 7 The other end of the main water supply pipe 1079 is connected to the backwash water supply control valve 108d2 and the end of the first stirring water supply section 10711 away from the flow metering device 1072 through a main water supply tee pipe 10791, which can further simplify the connection between the pipelines.

[0120] On the basis of the above embodiment, the outlet end of the water supply control valve 1078 described in the above embodiment is connected to the one end of the main water supply pipe 1079. When it is necessary to supply water to the stirring water supply pipe 1071 or the backwashing water supply pipe 108d1, the water pipe providing the water source is first connected to the inlet end of the water supply control valve 1078, and then the water supply control valve 1078 is opened; when the stirring water supply pipe 1071 and the backwashing water supply pipe 108d1 do not need to supply water, the water supply control valve 1078 is closed, and after the water supply control valve 1078 is closed, the connection between the water pipe providing the water source and the inlet end of the water supply control valve 1078 can be removed.

[0121] In an alternative embodiment of the present invention, see Figure 6 and Figure 7The backwash water supply assembly further includes a first backwash water supply branch pipe 108d3 and a second backwash water supply branch pipe (not shown in the figure), the first backwash water supply branch pipe 108d3 connects the other end of the backwash water supply pipe 108d1 with the backwash interface 108a31, and the second backwash water supply branch pipe connects the other end of the backwash water supply pipe 108d1 with the communication chamber 1032. In other words, the other end of the backwash water supply pipe 108d1 is connected to the backwash interface 108a31 through the first backwash water supply branch pipe 108d3, and the other end of the backwash water supply pipe 108d1 is connected to the communication chamber 1032 through the second backwash water supply branch pipe. In this way, the water source can be divided into two paths after passing through the backwash water supply pipe 108d1, one path enters the first backwash water supply branch pipe 108d3, and can be transported to the backwash interface 108a31 through the first backwash water supply branch pipe 108d3; the other path enters the second backwash water supply branch pipe, and can be transported to the connecting cavity 1032 through the second backwash water supply branch pipe for flushing the connecting cavity 1032. In this embodiment, the backwash water supply assembly can be used not only to flush the first stirring chamber 101a, the second stirring chamber 102a, the first slurry outlet pipe 108b and the second slurry outlet pipe 108c described above, but also to flush the slurry in the connecting cavity 1032 to prevent the connecting cavity 1032 from being blocked.

[0122] Optionally, see Figure 6 and Figure 7 The other end of the backwash water supply pipe 108d1, the backwash interface 108a31 and the connecting chamber 1032 are connected through a backwash three-way pipe 108d5, thereby simplifying the pipeline connection of the entire device.

[0123] Optionally, see Figure 6 and Figure 7 A backwash branch control valve 108d6 may be provided between the backwash tee 108d5 and the second backwash water supply branch pipe, that is, the second backwash water supply branch pipe is connected to the backwash tee 108d5 through the backwash branch control valve 108d6. In this way, not only can the backwash branch control valve 108d6 be used to control whether to supply water to the second backwash water supply branch pipe, but also the second backwash water supply branch pipe can be removed separately when water supply to the second backwash water supply branch pipe is not required. Optionally, the backwash branch control valve 108d6 may be a ball valve, which is easy to operate and low in cost.

[0124] Optionally, the connection chamber 103 is provided with a connection flushing interface (not shown) connected to the connecting chamber 1032, and the connection flushing interface may be one or more. Exemplarily, in some embodiments, the connection chamber 103 is provided with only one connection flushing interface, so that when flushing the connection chamber 103, it is sufficient to ensure that the switch door 1031 is in the first position, so that during the flushing process, the first connection chamber 10321 and the second connection chamber 10322 can be flushed; in other embodiments, the connection chamber 103 may be provided with two connection flushing interfaces, which are the first connection flushing interface and the second connection flushing interface, respectively, the first connection flushing interface is connected to the first connection chamber 10321, and the second connection flushing interface is connected to the second connection chamber 10322. The first connection flushing interface and the second connection flushing interface are both connected to the second backwashing water supply branch pipe, so that when flushing the connection chamber 103, the switch door 1031 can be in the first position or in the second position.

[0125] In one embodiment of the present invention, the mixing bin is provided with an overflow port connected to the mixing chamber, and the fire protection part 10 also includes an overflow assembly, which includes an overflow pipe, a pressure relief valve and a pressure detection device for detecting the pressure at the spraying outlet 1042. The overflow pipe connects the spraying outlet 1042 and the overflow port, and the pressure relief valve is arranged between the overflow pipe and the overflow port. The pressure relief valve and the pressure detection device are both electrically connected to the control device 109c. When the pressure value detected by the pressure detection device is greater than the set pressure value, the control device 109c controls the pressure relief valve to open for pressure relief.

[0126] See also Figure 5-Figure 7The first mixing chamber 101 is provided with a first overflow port 1015 communicating with the first mixing chamber 101a, the second mixing chamber 102 is provided with a second overflow port 1025 communicating with the second mixing chamber 102a, and the overflow assembly includes a first overflow pipe 1091, a second overflow pipe 1092, a first pressure relief valve 1093, a second pressure relief valve 1094 and a pressure detection device (not shown). The first overflow pipe 1091 connects the spraying outlet 1042 and the first overflow port 1015, the second overflow pipe 1092 connects the spraying outlet 1042 and the second overflow port 1025, the first pressure relief valve 1093 is provided between the first overflow pipe 1091 and the first overflow port 1015, and the second pressure relief valve 1094 is provided between the second overflow pipe 1092 and the second overflow port 1025. That is, one end of the first overflow pipe 1091 is connected to the spraying outlet 1042, and the other end of the first overflow pipe 1091 is connected to the first overflow port 1015 through the first pressure relief valve 1093; one end of the second overflow pipe 1092 is connected to the spraying outlet 1042, and the other end of the second overflow pipe 1092 is connected to the second overflow port 1025 through the second pressure relief valve 1094. The pressure detection device is used to detect the pressure at the spraying outlet 1042, and the pressure detection device is electrically connected to the first pressure relief valve 1093 and the second pressure relief valve 1094 to control the opening and closing of the first pressure relief valve 1093 and the second pressure relief valve 1094 according to whether the pressure value detected by the pressure detection device is greater than the set pressure value. Specifically, the pressure detection device, the first pressure relief valve 1093 and the second pressure relief valve 1094 are all electrically connected to the control device 109c of the coal yard fire prevention and extinguishing device 100, and the control device 109c controls the opening and closing of the first pressure relief valve 1093 and the second pressure relief valve 1094 according to the pressure value at the spraying outlet 1042 detected by the pressure detection device. For example, when the pressure value at the spraying outlet 1042 detected by the pressure detection device is greater than the set pressure value, the control device 109c controls the first pressure relief valve 1093 and the second pressure relief valve 1094 to open for pressure relief. By setting an overflow assembly, when the connecting pipeline between the spraying outlet 1042 and the spray gun or the grouting pipe is blocked, the slurry pumped to the spraying outlet 1042 can be respectively transported back to the first stirring chamber 101a and the second stirring chamber 102a through the first overflow port 1015 and the second overflow port 1025, thereby improving the overall safety and reliability of the device. Optionally, the pressure detection device can be a pressure sensor.

[0127] Optionally, the first pressure relief valve 1093 and the second pressure relief valve 1094 are both disc-type electric valves, which are easy to disassemble and assemble.

[0128] See also Figure 6-Figure 7The fire prevention and extinguishing part 10 also includes a slurry transmission pipe 109a, one end of which is connected to the spraying outlet 1042, and the other end of the slurry transmission pipe 109a is suitable for being connected to a spray gun (not shown) or a grouting pipe (not shown). When the other end of the slurry transmission pipe 109a is connected to the spray gun, the slurry at the spraying outlet 1042 is transported to the spray gun through the slurry transmission pipe 109a, and then sprayed onto the surface of the coal pile by the spray gun. When the other end of the slurry transmission pipe 109a is connected to the grouting pipe, the slurry at the spraying outlet 1042 is transported to the grouting pipe located at the coal pile through the slurry transmission pipe 109a, thereby injecting the slurry into the coal pile.

[0129] Optionally, see Figure 6 , a grouting control valve 109b is provided at one end of the slurry transmission pipe 109a away from the grouting outlet 1042, and the grouting control valve 109b is suitable for connecting a spray gun or a grouting pipe. In other words, the slurry transmission pipe 109a is connected to the spray gun or the grouting pipe through the grouting control valve 109b, so that the connection between the grouting outlet 1042 and the spray gun, or between the grouting outlet 1042 and the grouting pipe can be controlled by the grouting control valve 109b, and the grouting control valve 109b can be a ball valve with a simple structure and low cost. Among them, the shape of the nozzle of the spray gun can be arbitrarily selected according to actual needs, for example, it can be a jet-shaped nozzle or an umbrella-shaped nozzle.

[0130] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0131] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A method for preventing and extinguishing fire in a coal yard, characterized in that: The coal yard fire prevention and extinguishing method adopts a coal yard fire prevention and extinguishing device to perform fire prevention and extinguishing work, and the coal yard fire prevention and extinguishing device includes a motor vehicle body and a fire prevention and extinguishing part arranged on the motor vehicle body, and the fire prevention and extinguishing part includes: A material storage device for storing A material and a B material storage device for storing B material; A mixing component, the mixing component comprises a mixing chamber and a mixing element, the mixing chamber defines a mixing chamber, the mixing element is rotatably arranged in the mixing chamber, the mixing chamber is provided with a water inlet, an A material inlet, a B material inlet and a slurry outlet communicated with the mixing chamber, and the slurry outlet is provided with a slurry outlet control valve; A stirring and water supply component, wherein the stirring and water supply component is suitable for connecting a water source and the water inlet to quantitatively transport water from the water source to the stirring chamber; A material conveying component, the A material conveying component is connected to the A material storage device and the A material inlet so as to quantitatively convey the A material stored in the A material storage device to the stirring chamber; A B material conveying component, the B material conveying component is connected to the B material storage device and the B material inlet so as to quantitatively convey the B material stored in the B material storage device to the stirring chamber; A spray pump, wherein the spray pump has a spray inlet and a spray outlet, wherein the spray inlet is connected to the slurry discharge control valve, the spray outlet is suitable for connecting a spray gun or a grouting pipe, and a connecting pipeline between the spray inlet and the slurry discharge control valve is provided with a backwash interface; A backwash water supply assembly, wherein the backwash water supply assembly is adapted to be connected to the water source and the backwash interface so as to quantitatively or regularly deliver the backwash water from the downstream side of the slurry outlet toward the stirring chamber; A control device, wherein the control device is electrically connected to the stirring element, the stirring water supply assembly, the A material conveying assembly, the B material conveying assembly, the spraying pump, the backwashing water supply assembly and the slurry discharge control valve; The coal yard fire prevention and extinguishing method comprises the following steps: S1: adding the A material into the A material storage device, and adding the B material into the B material storage device; S2: the control device controls the stirring and water supply assembly to add a first set amount of water into the stirring chamber; S3: the control device controls the material A conveying component to add a second set amount of material A into the stirring chamber. After the material A is added, the control device controls the stirring element to stir the water and material A added into the stirring chamber for a first set stirring time to form a mixed material. S4: the control device controls the B material conveying assembly to add a third set amount of the B material into the stirring chamber. After the B material is added, the control device controls the stirring member to stir the B material added into the stirring chamber with the mixed material formed in S3 for a second set stirring time to form the slurry required for spraying. S5: the control device controls the slurry discharge control valve and the spray pump to open, so as to spray the slurry formed in S4 to the fire prevention and extinguishing area to be sprayed. When the pressure at the spray outlet is less than the set pressure value, the control device controls the spray pump to close. S6: The control device controls the backwash water supply component to quantitatively or regularly deliver flushing water into the stirring chamber. When the water supply amount or water supply time of the backwash water supply component reaches the set flushing water supply amount or the set flushing water supply time, the control device controls the backwash water supply component to stop supplying water and controls the spray pump to start. When the pressure at the spray outlet is less than the set pressure value, the control device controls the spray pump and the slurry discharge control valve to close. S7: Determine whether the fire prevention and extinguishing spraying work needs to be continued. If it needs to be continued, determine whether the amount of the A material remaining in the A material storage device can meet the needs of the next pulping, and whether the amount of the B material remaining in the B material storage device can meet the needs of the next pulping: If it can be satisfied, return to S2; if it cannot be satisfied, it is necessary to first replenish the A material in the A material storage device and replenish the B material in the B material storage device, and then return to S2 until the fire prevention and extinguishing spraying work is completed.

2. The coal yard fire prevention and extinguishing method according to claim 1, characterized in that: The fire prevention and extinguishing part also includes a display screen, which can be used to display at least one of the weight of the A material storage device, the weight of the B material storage device, the amount of water added to the stirring chamber by the stirring water supply component, the amount of the A material conveying component conveyed into the stirring chamber, the amount of the B material conveying component conveyed into the stirring chamber, the amount of water supplied into the stirring chamber by the backwashing water supply component or the water supply duration, the duration for the stirring element to stir the water added to the stirring chamber and the A material, the duration for the stirring element to stir the B material added to the stirring chamber and the mixed material, and the pressure value at the spraying outlet.

3. The coal yard fire prevention and extinguishing method according to claim 2 is characterized in that: The fire prevention and extinguishing part also includes a power supply module, which has a mains power mode and a battery mode. The power supply module can be switched between the mains power mode and the battery mode, and the background color of the display screen is different in the mains power mode and the battery mode.

4. The coal yard fire prevention and extinguishing method according to claim 1 or 2, characterized in that: The fire prevention and extinguishing part also includes a power supply module, which has a mains power mode and a battery mode. In the mains power mode, the spraying power of the spray pump can be switched between a low gear, a medium gear and a high gear; in the battery mode, the spraying power of the spray pump is at a low gear.

5. The coal yard fire prevention and extinguishing method according to claim 1, characterized in that: A low liquid level detection device for detecting the liquid level in the stirring chamber is provided in the stirring chamber, and the low liquid level detection device is electrically connected to the control device. In S7, execution of returning to S2 also needs to satisfy: the control device determines that the liquid level value detected by the low liquid level detection device is less than a set low liquid level threshold.

6. The method for preventing and extinguishing fire in a coal yard according to claim 1, characterized in that: The stirring chamber includes a first stirring chamber and a second stirring chamber, the stirring element includes a first stirring element and a second stirring element, a first stirring chamber is defined in the first stirring chamber, the first stirring chamber is provided with a first water inlet, a first A material inlet, a first B material inlet and a first slurry outlet communicated with the first stirring chamber, a first slurry outlet control valve is provided at the first slurry outlet, the first slurry outlet control valve is connected to the spraying inlet, and the first stirring element is rotatably disposed in the first stirring chamber; a second stirring chamber is defined in the second stirring chamber, the second stirring chamber is provided with a second water inlet, a second A material inlet, a second B material inlet and a second slurry outlet communicated with the second stirring chamber, a second slurry outlet control valve is provided at the second slurry outlet, the second slurry outlet control valve is connected to the spraying inlet, the second stirring element is rotatably disposed in the second stirring chamber, and the first stirring element, the second stirring element, the first slurry outlet control valve and the second slurry outlet control valve are all electrically connected to the control device; The stirring water supply component is suitable for connecting the water source and the first water inlet, and connecting the water source and the second water inlet; the A material conveying component is connected to the A material storage device and the first A material inlet, and connecting the A material storage device and the second A material inlet; the B material conveying component is connected to the B material storage device and the first B material inlet, and connecting the B material storage device and the second B material inlet; In S2, the control device may control the stirring and water supplying assembly to add the first set amount of water to the first stirring chamber and the second stirring chamber respectively, and the control device may also control the stirring and water supplying assembly to add the first set amount of water to only one of the first stirring chamber and the second stirring chamber; In S3, the control device may control the A material conveying component to add the second set amount of the A material to the first stirring chamber and the second stirring chamber respectively, and the control device may also control the A material conveying component to add the second set amount of the A material only to one of the first stirring chamber and the second stirring chamber, and after the A material is added, the control device may control the first stirring member and the second stirring member to stir the materials in the first stirring chamber and the second stirring chamber respectively for the first set stirring time to form the mixed material, and the control device may also control only one of the first stirring member and the second stirring member to stir the materials in the corresponding stirring chamber for the first set stirring time to form the mixed material; In S4, the control device can control the B material conveying component to add the third set amount of the B material into the first stirring chamber and the second stirring chamber respectively, and the control device can also control the B material conveying component to add the third set amount of the B material only into one of the first stirring chamber and the second stirring chamber, and after the B material is added, the control device can control the first stirring member and the second stirring member to stir the materials in the first stirring chamber and the second stirring chamber respectively for the second set stirring time to form the slurry required for spraying, and the control device can also control only one of the first stirring member and the second stirring member to stir the material in the corresponding stirring chamber for the second set stirring time to form the slurry required for spraying.

7. The coal yard fire prevention and extinguishing method according to claim 6, characterized in that: The stirring water supply assembly comprises: A stirring water supply pipe and a flow metering device, wherein the stirring water supply pipe comprises a first stirring water supply section and a second stirring water supply section, the flow metering device is connected between the first stirring water supply section and the second stirring water supply section, an end of the first stirring water supply section away from the flow metering device is suitable for connecting to a water source, and the flow metering device is electrically connected to the control device; a first branch stirring water supply pipe and a first stirring water inlet control valve, wherein one end of the first branch stirring water supply pipe is connected to an end of the second stirring water supply section away from the flow metering device, the other end of the first branch stirring water supply pipe is connected to the first water inlet, the first stirring water inlet control valve is arranged between the other end of the first branch stirring water supply pipe and the first water inlet, and the first stirring water inlet control valve is electrically connected to the control device; a second branch stirring water supply pipe and a second stirring water inlet control valve, wherein one end of the second branch stirring water supply pipe is connected to one end of the second stirring water supply section away from the flow metering device, the other end of the second branch stirring water supply pipe is connected to the second water inlet, the second stirring water inlet control valve is arranged between the other end of the second branch stirring water supply pipe and the second water inlet, and the second stirring water inlet control valve is electrically connected to the control device; In S2, the control device may control both the first stirring water inlet control valve and the second stirring water inlet control valve to be opened so as to add the first set amount of water into the first stirring chamber and the second stirring chamber respectively, and the control device may also control only one of the first stirring water inlet control valve and the second stirring water inlet control valve to be opened so as to add the first set amount of water into only one of the first stirring chamber and the second stirring chamber.

8. The method for preventing and extinguishing fire in a coal yard according to claim 6, characterized in that: The connecting pipeline between the shotcrete inlet and the slurry discharge control valve comprises a connecting joint, a first slurry discharge pipe and a second slurry discharge pipe, the connecting joint comprises a first connection port, a second connection port and a third connection port which are connected to each other, the third connection port is connected to the shotcrete inlet, and the backwashing interface is arranged on the side wall of the third connection port; the first slurry discharge pipe is connected to the first slurry discharge control valve and the first connection port, and the second slurry discharge pipe is connected to the second slurry discharge control valve and the second connection port; The backwash water supply assembly includes a backwash water supply pipe and a backwash water supply control valve, one end of the backwash water supply pipe is suitable for connecting to a water source, the other end of the backwash water supply pipe is connected to the backwash interface, the backwash water supply control valve is suitable for being arranged between the one end of the backwash water supply pipe and the water source, and the backwash water supply control valve is electrically connected to the control device.

9. The coal yard fire prevention and extinguishing method according to claim 8, characterized in that: The mixing assembly further includes a connecting chamber and a switch door, wherein the connecting chamber is connected between the first mixing chamber and the second mixing chamber, a connecting chamber is defined in the connecting chamber, and the connecting chamber is connected with both the first mixing chamber and the second mixing chamber, and the switch door is movably disposed on the connecting chamber between a first position and a second position. When the switch door body is in the first position, the first stirring chamber and the second stirring chamber are connected through the connecting chamber; when the switch door body is in the second position, the switch door body separates the connecting chamber into a first connecting chamber and a second connecting chamber that are not connected to each other, the first connecting chamber is connected to the first stirring chamber, and the second connecting chamber is connected to the second stirring chamber; The backwash water supply assembly also includes a first backwash water supply branch pipe and a second backwash water supply branch pipe, wherein the first backwash water supply branch pipe connects the other end of the backwash water supply pipe with the backwash interface, and the second backwash water supply branch pipe connects the other end of the backwash water supply pipe with the connecting cavity.

10. The coal yard fire prevention and extinguishing method according to claim 6, characterized in that: The A material conveying assembly comprises: A screw conveyor, wherein the screw conveyor has an A material conveying inlet and an A material conveying outlet, wherein the A material conveying inlet is located below the discharge port of the A material storage device and is communicated with the discharge port, and the A material conveying outlet is located above the mixing component and is connected to both the first A material inlet and the second A material inlet; a first A material control valve and a second A material control valve, wherein the first A material control valve is arranged between the A material delivery outlet and the first A material inlet, and the second A material control valve is arranged between the A material delivery outlet and the second A material inlet; A material weighing device, the A material weighing device is arranged at the bottom of the A material storage device to weigh the weight of the A material storage device, the A material weighing device, the screw conveyor, the first A material control valve and the second A material control valve are all electrically connected to the control device, In S3, the control device can control both the first A material control valve and the second A material control valve to be opened, so as to add the second set amount of the A material into the first stirring chamber and the second stirring chamber respectively; the control device can also control only one of the first A material control valve and the second A material control valve to be opened, so as to add the second set amount of the A material into only one of the first stirring chamber and the second stirring chamber.

11. The coal yard fire prevention and extinguishing method according to claim 6, characterized in that: The B material conveying assembly comprises: A first vacuum suction machine, the first vacuum suction machine comprises a first negative pressure vacuum pump, a first vacuum silo, a first suction pipe, a first air extraction pipe and a first B material control valve, the first vacuum silo is provided with a first B material conveying inlet, a first B material conveying outlet and a first air extraction port, the first B material conveying outlet is communicated with the first B material inlet, the first suction pipe is connected to the B material storage device and the first B material conveying inlet, the first air extraction pipe is connected to the first negative pressure vacuum pump and the first air extraction port, and the first B material control valve is used to control the opening and closing of the first B material conveying outlet; A second vacuum suction machine, the second vacuum suction machine comprises a second negative pressure vacuum pump, a second vacuum silo, a second suction pipe, a second air extraction pipe and a second B material control valve, the second vacuum silo is provided with a second B material delivery inlet, a second B material delivery outlet and a second air extraction port, the second B material delivery outlet is communicated with the second B material inlet, the second suction pipe connects the B material storage device and the second B material delivery inlet, the second air extraction pipe connects the second negative pressure vacuum pump and the second air extraction port, and the second B material control valve is used to control the opening and closing of the second B material delivery outlet; A B material weighing device, the B material weighing device is arranged at the bottom of the B material storage device to weigh the weight of the B material storage device, and the B material weighing device, the first negative pressure vacuum pump and the second negative pressure vacuum pump are all electrically connected to the control device; In S4, the control device may control both the first negative pressure vacuum pump and the second negative pressure vacuum pump to be turned on so as to add the third set amount of the B material into the first stirring chamber and the second stirring chamber respectively; the control device may also control only one of the first negative pressure vacuum pump and the second negative pressure vacuum pump to be turned on so as to add the third set amount of the B material into only one of the first stirring chamber and the second stirring chamber.

12. The coal yard fire prevention and extinguishing method according to claim 1, characterized in that: The stirring chamber is provided with an overflow port communicating with the stirring chamber, and the fire prevention part further includes an overflow component, which includes: An overflow pipe, the overflow pipe connecting the shotcrete outlet and the overflow port; A pressure relief valve and a pressure detection device for detecting the pressure at the spraying outlet, wherein the pressure relief valve is arranged between the overflow pipe and the overflow port, and the pressure relief valve and the pressure detection device are both electrically connected to the control device. When the pressure value detected by the pressure detection device is greater than the set pressure value, the control device controls the pressure relief valve to open.

Images