Mine high water-absorbing resistance agent pneumatic spraying device and use method thereof

Abstract

The present application relates to a kind of mine high water-absorbing inhibitor pneumatic spraying device and its use method.For overcoming prior art defects, the present mine high water-absorbing inhibitor pneumatic spraying device includes solid inhibitor feeding mechanism, high-pressure air pipe and spray gun head, the solid inhibitor feeding mechanism includes sealed pressurized tank and screw feeder, the sealed pressurized tank is internally provided with A cavity and B cavity communicated at top, further including three-phase mixer, three-phase mixer includes feed inlet, water inlet and discharge outlet, the feed inlet is connected with the outlet of B cavity through air material pipe, and stop valve is provided on air material pipe, the water inlet is communicated with underground high-pressure water supply pipe through water inlet pipe, and flowmeter, water inlet regulating valve are provided on water inlet pipe, the discharge outlet is connected with the spray head through hose.The present application has large inhibitor storage capacity, and feeding is stable by using screw feeder, water ratio is scientific and stable, and it is particularly suitable for spraying high water-absorbing inhibitor colloid.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of mine high water-absorbing inhibitor pneumatic spraying device and its use method. BACKGROUND

[0002] Coal lost in coal mine and coal stored for a long time in ground coal yard need fire prevention treatment, 40-140 mesh particles and powdery high water-absorbing inhibitor are different from chlorinated salt inhibitor, high water-absorbing inhibitor has high water absorption multiple, and cannot use chlorinated salt inhibitor electric plunger pump to spray.

[0003] Chinese invention patent application with publication number CN 114517704 A disclosed on 2022.05.20 discloses a kind of mine granular inhibitor spraying device, mainly includes: gas delivery part, automatic weighing unit, granular inhibitor stirring unit, ultrasonic vibration system and broken material extraction system;Automatic weighing unit controls the use amount of granular inhibitor entering granular inhibitor stirring unit;Granular inhibitor stirring unit puts multiple granular inhibitors, and stirs granular inhibitor to form inhibitor material;Gas delivery part provides gas power in compressed air mode, so that the inhibitor material in storage bin is transported to the spraying system through the delivery pipeline;Ultrasonic vibration system provides ultrasonic vibration function to clean the inhibitor deposits inside the spraying system and / or the delivery pipeline;Broken material extraction system extracts broken material formed under ultrasonic vibration function.

[0004] According to the patent application file, the granular inhibitor sprayed by the device is stirred in three dimensions underground, which increases the difficulty and workload of on-site operation. The spraying port belongs to a kind of shower type nozzle, and the granular inhibitor with high water absorption is not suitable for using the shower type nozzle. The shower increases the resistance and is easy to block, and the same power loss is not conducive to increasing the spraying distance;The use amount of inhibitor is controlled by compressed air and lifting tray, which cannot be accurately controlled, resulting in large material consumption, high cost and poor coverage effect.

[0005] Chinese utility model patent application with publication number CN 204511497 U disclosed on 2015.07.29 discloses a kind of mine inhibitor jet delivery and pneumatic spraying device, mainly includes: inhibitor proportioning and mixing device, buffer pool, pneumatic delivery atomization spraying device. The device uses pressure water and compressed air as power to realize the whole process of automatic proportioning, mixing, delivery and spraying of solid granular inhibitor or liquid inhibitor in mine underground. When using, the inhibitor is sprayed out through the atomization nozzle, which is a chlorinated salt inhibitor spraying device that can be completely dissolved in water, and the chlorinated salt inhibitor has corrosion to the metal support and other equipment in coal mining face. SUMMARY

[0006] The technical problem to be solved by the present invention is how to overcome the above-mentioned defects of the prior art and provide a pneumatic spraying device for high water absorption inhibitor in mines and its usage method.

[0007] To solve the above-mentioned technical problems, this mine's high-absorption water-absorbing inhibitor pneumatic spraying device includes a solid inhibitor feeding mechanism, a high-pressure air pipe, and a spray gun head. Its features include: the solid inhibitor feeding mechanism comprising a sealed pressurized tank and a screw feeder; the sealed pressurized tank has two interconnected chambers, A and B; the screw feeder includes an outer cylinder and a feeding screw; the outer cylinder has an inlet port, an outlet port at one end, and a drive mechanism at the other end; the feeding screw is driven by the drive mechanism; the bottom of chamber A has an outlet port communicating with the inlet port of the screw feeder; the outlet port of the screw feeder communicates with chamber B; the top of the sealed pressurized tank has a feed port and an air inlet port; the feed port has an openable and closable sealing cover; the air inlet port is connected to a high-pressure air pipe underground via a blowing air pipe and a high-pressure air pipe, and the blowing air pipe is equipped with a blowing air regulating valve; and the bottom of chamber B has an outlet.

[0008] It also includes a three-phase mixer, which includes a feed inlet, a water inlet, and a discharge outlet. The feed inlet is connected to the outlet of chamber B through an air supply pipe, and a shut-off valve is provided on the air supply pipe. The water inlet is connected to the underground high-pressure water supply pipe through an inlet pipe, and a flow meter and an inlet regulating valve are provided on the inlet pipe. The discharge outlet is connected to the spray gun head through a flexible hose.

[0009] In this invention, the sealed pressurized tank A chamber can store more solid inhibitors. The solid inhibitors are fed by a screw feeder. As long as the speed of the screw feeder is controlled, the feeding speed of the solid inhibitors can be stabilized. At the same time, the opening of the water inlet regulating valve can be adjusted according to the speed of the screw feeder to control the water inlet flow rate. With this design, the highly absorbent inhibitor colloid can be sprayed out stably and continuously.

[0010] As an optimization, the three-phase mixer includes an outer tube and an inner core, forming an annular channel with a repeatedly changing inner diameter between them. The inner core and the outer tube are connected by multiple connecting columns. The two ends of the annular channel are the feed inlet and the discharge outlet, respectively. The water inlet is located on the outer tube wall near the feed inlet and communicates with the annular channel. With this design, water and the gas-solid mixture delivered by the blowing duct continuously collide and mix in the annular channel with its repeatedly changing inner diameter, resulting in rapid and thorough mixing and a good mixing effect.

[0011] As an optimization, the drive mechanism includes a pneumatic motor and a reducer. The pneumatic motor drives the feed screw through the reducer. The pneumatic motor has an air inlet and an air outlet. Its air inlet is connected to a high-pressure air pipe through a drive air pipe, and a pneumatic motor regulating valve is installed on the drive air pipe. This design, using a pneumatic motor, can make full use of the underground high-pressure air resources.

[0012] As an optimization, it also includes an electrical control box, which houses an industrial control computer and a control panel. The control panel includes a display screen, a pneumatic motor regulating valve knob, a water inlet valve regulating knob, a material blowing valve regulating knob, and a shut-off valve button. A water pressure gauge is installed on the water inlet pipe, and an air pressure gauge is installed on the material blowing pipe. The flow meter on the water inlet pipe is an electronic flow meter. The pneumatic motor also has a speed sensor. The speed sensor and the flow meter are respectively connected to the signal input terminal of the industrial control computer. The pneumatic motor regulating valve knob, the water inlet valve regulating knob, the material blowing valve regulating knob, and the shut-off valve button are respectively connected to the industrial control computer. The control signal input terminal is connected to the shut-off valve, which is a normally closed shut-off valve. The normally closed shut-off valve, along with the pneumatic motor regulating valve, the water inlet regulating valve, and the blowing air regulating valve, are all electromagnetic remote control valves or electric remote control valves. The aforementioned electromagnetic remote control valves or electric remote control valves are respectively connected to the control signal output terminal of the industrial control computer through control signal lines. The industrial control computer calculates the actual feeding speed of the solid superabsorbent inhibitor based on the actual rotation speed of the pneumatic motor, and then calculates the optimal water inlet flow rate required for preparing the superabsorbent inhibitor colloid based on the actual feeding speed of the solid superabsorbent inhibitor, and displays it on the display screen synchronously with the actual water inlet flow rate.

[0013] Note: The optimal inlet flow rate is usually calculated based on the maximum allowable moisture content of the qualified superabsorbent inhibitor colloid. When used for spraying water-containing coal, the flow rate can be appropriately reduced, and the same applies below.

[0014] With this design, when using the device, first turn on the pneumatic motor and stabilize it at an appropriate speed. The speed of the pneumatic motor is directly proportional to the feeding speed of the screw feeder. Adjust the water inlet valve knob according to the speed of the pneumatic motor to match the feeding speed of the solid inhibitor with the water flow rate, so as to continuously and stably output the highly absorbent inhibitor colloid.

[0015] As an optimization, a pressure regulating valve is also installed on the blowing duct. This valve is located upstream of the blowing air regulating valve. An air pressure sensor is installed inside the air pressure gauge, and a water pressure sensor is installed inside the water pressure gauge. Both the air pressure sensor and the water pressure sensor are connected to the signal input terminal of the industrial control computer. The display screen simultaneously displays the water pressure in the inlet pipe sensed by the water pressure sensor and the air pressure in the blowing duct sensed by the air pressure sensor. This design facilitates the observation of the water pressure in the inlet pipe and the air pressure in the blowing duct.

[0016] As an optimization, an inner partition is provided between chamber A and chamber B. This inner partition, together with part of the inner wall of the sealed pressurized tank, forms the inner wall of chamber A. A guide plate is provided between the inner wall of chamber A and the bottom outlet of chamber A. A guide air disc is also provided on the inner wall of the guide plate. A jet pipe is welded to the center of the guide air disc. Multiple air outlet holes are opened on the pipe wall at the root of the jet pipe. After the lower end of the jet pipe passes through the guide plate, it is connected to the high-pressure air pipe through a backflush pipe. A backflush valve is provided on the backflush pipe. There is a gap between the edge of the guide air disc and the guide plate.

[0017] With this design, when solid inhibitors become blocked in cavity A, simply open the backflush valve, and the air will be blown into cavity A through the backflush pipe, the jet pipe, and finally through the gap between the guide disc and the guide base plate, loosening the surrounding solid inhibitors.

[0018] As an optimization, the high-pressure air duct is also equipped with a high-pressure air main valve, and the water inlet pipe is also equipped with a water inlet main valve, which is located near the underground high-pressure water supply pipe. This design facilitates the connection between the mine's high-absorption water inhibitor pneumatic spraying device and the underground high-pressure water supply pipe and high-pressure air duct.

[0019] The method of using the aforementioned pneumatic spraying device for superabsorbent water inhibitors in mines includes the following steps:

[0020] ①. The pneumatic spraying device for high water absorption inhibitor in mines is described above. Open the closable sealing cover, take a sufficient amount of solid inhibitor, add it into the A cavity through the feed port, and then seal the feed port with the closable sealing cover.

[0021] ②. Transport the pneumatic spraying device for the high water absorption inhibitor of this mine to a suitable location in the underground coal mine, connect the high-pressure air pipe to the underground high-pressure air pipe, and connect the water inlet pipe to the underground high-pressure water supply pipe;

[0022] ③. Then, the operator holds the spray gun head, aims it at the coal body to be sprayed, starts the industrial control computer, and first opens the high-pressure air main valve. Next, the operator opens the material blowing air regulating valve using the material blowing air valve adjustment knob, gradually opening it to 20% of its opening. The operator then opens the stop valve using the stop valve button, allowing air to be sprayed out from the spray gun head. The operator checks if the spray gun head is unobstructed; if not, it is cleared immediately. After confirming the spray gun head is unobstructed, the operator opens the water inlet regulating valve using the inlet valve adjustment knob, gradually opening it to 20% of its opening, introducing water into the three-phase mixer. The water then flows through the hose and spray gun head. The operator adjusts the opening of the material blowing air regulating valve using the material blowing air valve adjustment knob to ensure the water vapor sprayed from the spray gun head reaches the coal body to be sprayed.

[0023] ④. Then, open the pneumatic motor regulating valve by turning the knob, gradually opening it to 20% to start the pneumatic motor. The pneumatic motor drives the feeding screw to rotate through the reducer, sending the solid inhibitor into chamber B. Along with the high-pressure air entering chamber B, the inhibitor passes through the outlet at the bottom of chamber B and the air-feed pipe, entering the three-phase mixer. In the three-phase mixer, it is thoroughly mixed with the water supplied from the water inlet pipe, forming a highly absorbent inhibitor colloid. This colloid is then sprayed out through the hose and spray gun nozzle.

[0024] ⑤. Then, gradually increase the opening of the pneumatic motor regulating valve to 80% using the pneumatic motor regulating valve knob, and observe the actual speed of the pneumatic motor on the display screen. After the pneumatic motor speed stabilizes, gradually increase the opening of the water inlet regulating valve using the water inlet valve regulating knob until the actual water inlet flow rate equals the optimal water inlet flow rate or the difference between the actual water inlet flow rate and the optimal water inlet flow rate does not exceed 5% of the optimal water inlet flow rate. Then, the superabsorbent inhibitor colloid can be continuously and stably output until the pneumatic spraying operation of the inhibitor is completed.

[0025] ⑥. First, turn off the pneumatic motor by adjusting the pneumatic motor control valve knob. Then, adjust the water inlet control valve to 20% by adjusting the water inlet valve knob. Observe the spray from the nozzle head at all times. After the spray turns into clear water, close the water inlet control valve by adjusting the water inlet valve knob to stop the water supply. Close the main water inlet valve and disconnect the water inlet pipe from the high-pressure water supply pipe in the well. Continue to observe the spray from the nozzle head. After the spray changes from water mist to dry air, continue blowing for 2 minutes. Then, close the blowing air control valve by adjusting the blowing air valve knob. Finally, disconnect the high-pressure air pipe from the high-pressure air pipe in the well.

[0026] Steps ③-⑤ are very convenient and quick to adjust. The adjustment effect can be seen in time through the display screen. After the speed of the fan motor is stabilized, the actual flow rate of the water inlet quickly reaches or basically reaches the optimal water inlet flow rate, thus obtaining the superabsorbent inhibitor colloid with the best water content.

[0027] The apparatus and method of this invention can be used to conveniently prepare a polymer superabsorbent inhibitor colloid with a mass concentration of 0.5%. Its adhesive covering and sealing performance is no less than that of a 20% magnesium chloride or calcium chloride inhibitor colloid, and its fireproof and cooling performance is even better.

[0028] This design makes operation and adjustment convenient, and allows for the continuous and stable output of the cheapest superabsorbent inhibitor colloid at the lowest possible cost.

[0029] The pneumatic spraying device for superabsorbent water inhibitors in mines of this invention has a large storage capacity of superabsorbent water inhibitors, stable feeding with a screw feeder, and a scientific and stable water ratio, making it particularly suitable for spraying superabsorbent water inhibitor colloids. Attached Figure Description

[0030] The pneumatic spraying device for high water absorption inhibitor in mines according to the present invention will be further described below with reference to the accompanying drawings:

[0031] Figure 1 This is a schematic diagram of the structure of one implementation method of the pneumatic spraying device for high water absorption inhibitor in this mine;

[0032] Figure 2 This is a schematic diagram of the end face of the three-phase mixer in Embodiment 2 of the pneumatic spraying device for high water absorption inhibitor in this mine.

[0033] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure of the three-phase mixer along the AA direction;

[0034] Figure 4 yes Figure 2 The diagram shows a cross-sectional view of the three-phase mixer along the BB direction.

[0035] In the diagram: 1 is the high-pressure air duct, 2 is the spray gun head, 3 is the sealed pressurized tank, 30 is the inner partition, 31 is chamber A, 32 is chamber B, 33 is the openable and closable sealing cover, 34 is the blowing air duct, 35 is the blowing air regulating valve, 36 is the air pressure gauge, 37 is the pressure stabilizing valve, 38 is the guide plate, 39 is the guide air disc, 4 is the screw feeder, 41 is the outer cylinder, 42 is the feeding screw, 43 is the feed port, 40 is the jet pipe, 44 is the solid inhibitor, 45 is the backflush pipe, 46 is the backflush valve, 47 is the actual speed of the pneumatic motor, 5 is the three-phase mixer, 51 is the feed port, 52 is the water inlet, 53 is the discharge port, 54 is the outer pipe, 541 is the arc plate, 542 is the clamping bar, 543 is the through hole, 55 is the inner core, 5 6 is the annular channel, 57 is the connecting column, 58 is the fastening bolt, 6 is the air duct, 7 is the shut-off valve, 8 is the water inlet pipe, 9 is the flow meter, 10 is the water inlet regulating valve, 11 is the hose, 12 is the pneumatic motor, 13 is the reducer, 14 is the drive duct, 15 is the pneumatic motor regulating valve, 16 is the electrical control box, 17 is the display screen, 18 is the pneumatic motor regulating valve knob, 19 is the water inlet valve regulating knob, 20 is the material blowing valve regulating knob, 21 is the shut-off valve button, 22 is the water pressure gauge, 23 is the speed sensor, 24 is the optimal water inlet flow rate required for preparing the high water absorption inhibitor colloid, 25 is the actual water inlet flow rate, 26 is the water pressure in the water inlet pipe, 27 is the air pressure in the material blowing duct, 28 is the high-pressure air main valve, and 29 is the water inlet main valve. Detailed Implementation

[0036] Implementation method one: such as Figure 1As shown, the pneumatic spraying device for high water absorption inhibitor in this mine includes a solid inhibitor feeding mechanism, a high-pressure air duct 1, and a spray gun head 2. Its features include: the solid inhibitor feeding mechanism comprising a sealed pressure tank 3 and a screw feeder 4; the sealed pressure tank 3 has two interconnected chambers, A 31 and B 32; the screw feeder 4 includes an outer cylinder 41 and a feeding screw 42; the outer cylinder 41 has an inlet port 43, an outlet port at one end, and a drive mechanism at the other end; the feeding screw 42... Driven by a drive mechanism, the bottom of chamber A 31 is provided with a discharge port, which is connected to the feed port 43 of the screw feeder 4. The discharge port of the screw feeder 4 is connected to chamber B 32. The top of the sealed pressure tank 3 is provided with a feeding port and an air inlet. The feeding port is provided with an openable and closable sealing cover 33. The air inlet is connected to the underground high-pressure air pipe (not shown in the figure) through the blowing air pipe 34 and the high-pressure air pipe 1. The blowing air pipe 34 is provided with a blowing air regulating valve 35. The bottom of chamber B 32 is provided with an outlet.

[0037] It also includes a three-phase mixer 5, which includes a feed inlet 51, a water inlet 52 and a discharge outlet 53. The feed inlet 51 is connected to the outlet of chamber B 32 through a material pipe 6. A shut-off valve 7 is provided on the material pipe 6. The water inlet 52 is connected to a high-pressure water supply pipe (not shown in the figure) for use underground through a water inlet pipe 8. A flow meter 9 and a water inlet regulating valve 10 are provided on the water inlet pipe 8. The discharge outlet 53 is connected to the spray gun head 2 through a hose 11.

[0038] The drive mechanism includes a pneumatic motor 12 and a reducer 13. The pneumatic motor 12 drives the feed screw 42 through the reducer 13. The pneumatic motor 12 has an air inlet and an air outlet. Its air inlet is connected to the high-pressure air pipe 1 through the drive air pipe 14. The drive air pipe 14 is equipped with a pneumatic motor regulating valve 15.

[0039] It also includes an electrical control box 16, which houses an industrial control computer (not shown) and a control panel. The control panel includes a display screen 17, a pneumatic motor regulating valve knob 18, a water inlet valve regulating knob 19, a material blowing valve regulating knob 20, and a shut-off valve button 21. A water pressure gauge 22 is installed on the water inlet pipe 8, and a gas pressure gauge 36 is installed on the material blowing pipe 34. The flow meter 9 on the water inlet pipe 8 is an electronic flow meter. A speed sensor 23 is also installed on the pneumatic motor 12. The speed sensor 23 and the flow meter 9 are respectively connected to the signal input terminal of the industrial control computer. The pneumatic motor regulating valve knob 18, the water inlet valve regulating knob 19, the material blowing valve regulating knob 20, and the shut-off valve button are also included. 21 are respectively connected to the control signal input terminal of the industrial control computer. The shut-off valve 7 is a normally closed shut-off valve. The normally closed shut-off valve 7, the pneumatic motor regulating valve 15, the water inlet regulating valve 10, and the blowing air regulating valve 35 are all electromagnetic remote control valves or electric remote control valves. The above-mentioned electromagnetic remote control valves or electric remote control valves are respectively connected to the control signal output terminal of the industrial control computer through control signal lines. The industrial control computer calculates the actual feeding speed of the solid superabsorbent inhibitor based on the actual rotation speed of the pneumatic motor 12, and then calculates the optimal water inlet flow rate 24 required for preparing the superabsorbent inhibitor colloid based on the actual feeding speed of the solid superabsorbent inhibitor, and displays it synchronously with the actual water inlet flow rate 25 on the display screen 17.

[0040] The blowing air duct 34 is also equipped with a pressure regulating valve 37, which is located upstream of the blowing air regulating valve 35. The air pressure gauge 36 is equipped with an air pressure sensor (not shown in the figure), and the water pressure gauge 22 is equipped with a water pressure sensor. The water pressure sensor and the air pressure sensor are respectively connected to the signal input terminal of the industrial control computer. The display screen 17 simultaneously displays the water pressure 26 of the inlet pipe sensed by the water pressure sensor and the air pressure 27 of the blowing air duct sensed by the air pressure sensor.

[0041] An inner partition 30 is provided between cavity A 31 and cavity B 32. This inner partition 30, together with part of the inner wall of the sealed pressurized tank, forms the inner wall of cavity A 31. A guide plate 38 is provided between the inner wall of cavity A 31 and the bottom outlet of cavity A. A guide air disc 39 is also provided on the inner wall of the guide plate 38. A jet pipe 40 is welded to the center of the guide air disc 39. Multiple air outlet holes are opened on the root wall of the jet pipe 40. The lower end of the jet pipe 40 passes through the guide plate 38 and communicates with the high-pressure air pipe 1 through a backflush pipe 45. A backflush valve 46 is provided on the backflush pipe 45. There is a gap between the edge of the guide air disc 39 and the guide plate 38. When high-pressure air is introduced, the high-pressure air blows out from the gap, loosening the surrounding solid inhibitor.

[0042] The high-pressure air duct 1 is also equipped with a high-pressure air main valve 28, and the water inlet pipe 8 is also equipped with a water inlet main valve 29. The water inlet main valve 29 is located near the well and is connected to a high-pressure water supply pipe.

[0043] The method of using the aforementioned pneumatic spraying device for superabsorbent water inhibitors in mines includes the following steps:

[0044] ①. The pneumatic spraying device for the mine high water absorption inhibitor, by opening the closable sealing cover 33, taking a sufficient amount of solid inhibitor 44, and adding it into the A cavity 31 through the feeding port, and then sealing the feeding port with the closable sealing cover 33, as described above. Figure 1 As shown;

[0045] ②. Transport the pneumatic spraying device for the high water absorption inhibitor of this mine to a suitable location in the underground coal mine, connect the high-pressure air pipe to the underground high-pressure air pipe, and connect the water inlet pipe to the underground high-pressure water supply pipe;

[0046] ③. Then, the operator holds the spray gun head 2, aims it at the coal body to be sprayed (not shown in the figure), starts the industrial control computer, and then first opens the high-pressure air main valve 28. Then, the operator opens the blowing air regulating valve 35 through the blowing air valve regulating knob 20 and gradually opens it to 20%. The operator opens the stop valve 7 through the stop valve button 21 and sprays air outward from the spray gun head 2. The operator checks whether the spray gun head 2 is unobstructed. If it is not unobstructed, it is cleared immediately. After confirming that the spray gun head 2 is unobstructed, the operator opens the water inlet regulating valve 10 through the water inlet valve regulating knob 19 and gradually opens it to 20% to introduce water into the three-phase mixer 5. Then, the water is sprayed out through the hose 11 and the spray gun head 2. The operator adjusts the opening of the blowing air regulating valve switch 35 through the blowing air valve regulating knob 20 so that the water and air sprayed from the spray gun head 2 reaches the coal body to be sprayed.

[0047] ④. Then, open the wind motor regulating valve 15 by turning the wind motor regulating valve knob 18, and gradually open it to 20% opening. Start the wind motor 12. The wind motor 12 drives the feeding screw 42 to rotate through the reducer 13, sending the solid inhibitor 44 into the B chamber 32. Along with the high-pressure air entering the B chamber 32, it enters the three-phase mixer 5 through the outlet at the bottom of the B chamber 32 and the air supply pipe 6. In the three-phase mixer 5, it is fully mixed with the water delivered by the water inlet pipe 8 to form a highly absorbent inhibitor colloid, which is then sprayed out through the hose 11 and the spray gun head 2.

[0048] ⑤. Then, gradually increase the opening of the pneumatic motor regulating valve 15 to 80% using the pneumatic motor regulating valve knob 18, and observe the actual speed of the pneumatic motor 12 on the display screen 17. After the speed of the pneumatic motor 12 stabilizes, gradually increase the opening of the water inlet regulating valve 10 using the water inlet valve regulating knob 19 until the actual water inlet flow rate 25 equals the optimal water inlet flow rate 24, or the difference between the actual water inlet flow rate 25 and the optimal water inlet flow rate 24 does not exceed 5% of the optimal water inlet flow rate 24. Then, the superabsorbent inhibitor colloid can be continuously and stably output until the pneumatic spraying operation of the inhibitor is completed.

[0049] ⑥. First, turn off the pneumatic motor 12 by turning the pneumatic motor regulating valve knob 18. Then, adjust the opening of the water inlet regulating valve 10 to 20% by turning the water inlet valve regulating knob 19. Observe the spray from the spray nozzle 2 at all times. After the spray turns into clear water, close the water inlet regulating valve 10 by turning the water inlet valve regulating knob 19 to stop the water intake. Close the main water inlet valve 29 and disconnect the water inlet pipe 8 from the underground high-pressure water supply pipe. Then, continue to observe the spray from the spray nozzle. After the spray changes from water mist to dry air, continue blowing for 2 minutes. Then, close the blowing air regulating valve 35 by turning the blowing air valve regulating knob 20. Finally, disconnect the high-pressure air pipe 1 from the underground high-pressure air pipe.

[0050] This allows the moisture to be thoroughly dried, preventing the superabsorbent polymer from absorbing water and deteriorating during the next use.

[0051] Implementation Method Two: (e.g.) Figures 2-4 As shown, the three-phase mixer 5 includes an outer tube 54 and an inner core 55. An annular channel 56 with a repeatedly changing inner diameter is formed between the outer tube 54 and the inner core 55. The inner core 55 and the outer tube 54 are connected by multiple connecting columns 57. The two ends of the annular channel 56 are the feed inlet 51 and the discharge outlet 53, respectively. The water inlet 52 is located on the wall of the outer tube 54 near the feed inlet 51 and communicates with the annular channel 56.

[0052] For ease of processing and manufacturing, the outer tube 54 is divided into two arc-shaped plates 541 and two clamping strips 542. The inner core 55 is disposed between the two clamping strips 542. The connecting column 57 is disposed between the inner core 5 and the clamping strips 542 on both sides to fix the inner core 55. The two arc-shaped plates 541 are clamped on the clamping strips 542 on both sides. The clamping strips 542 and the arc-shaped plates 541 are respectively provided with a pair of through holes 543 at opposite positions, and fastening bolts 58 are inserted in the opposite through holes 543. The two arc-shaped plates 541 and the clamping strips 542 are fixed together by the fastening bolts 58. The remaining structure is as shown in Embodiment 1, which is omitted.

Claims

1. A pneumatic spraying device for a high-absorption water-absorbing inhibitor in mines, comprising a solid inhibitor feeding mechanism, a high-pressure air pipe, and a spray nozzle, characterized in that: The solid inhibitor feeding mechanism includes a sealed pressure tank and a screw feeder. The sealed pressure tank has two chambers, A and B, which are connected at the top. The screw feeder includes an outer cylinder and a feeding screw. The outer cylinder has an inlet port, an outlet port at one end, and a drive mechanism at the other end. The feeding screw is driven by the drive mechanism. The bottom of chamber A has an outlet port that communicates with the inlet port of the screw feeder. The outlet port of the screw feeder communicates with chamber B. The sealed pressurized tank is equipped with a feeding port and an air inlet at the top. The feeding port has an openable and closable sealing cover. The air inlet is connected to the underground high-pressure air pipe via a blowing air pipe and a high-pressure air pipe. The blowing air pipe is equipped with a blowing air regulating valve. The bottom of chamber B has an outlet and also includes a three-phase mixer. The three-phase mixer includes a feeding port, a water inlet, and a discharging port. The feeding port is connected to the outlet of chamber B via a material pipe, which is equipped with a shut-off valve. The water inlet is connected to the underground high-pressure water supply pipe via a water inlet pipe, which is equipped with a flow meter and a water inlet regulating valve. The discharging port is connected to the spray gun head via a hose. The three-phase mixer includes an outer tube and an inner core. An annular channel with a repeatedly changing inner diameter is formed between the outer tube and the inner core. The inner core and the outer tube are connected by multiple connecting columns. The two ends of the annular channel are the feeding port and the discharging port, respectively. The water inlet is located on the outer tube wall near the feeding port and is connected to the annular channel. Chambers A and B... An inner partition is provided between the chambers. This inner partition, together with part of the inner wall of the sealed pressurized tank, forms the inner wall of chamber A. The inner wall of chamber A and the bottom outlet of chamber A are provided with a guide plate. A guide air disc is also provided on the inner wall of the guide plate. A jet pipe is welded to the center of the guide air disc. Multiple air outlets are opened on the pipe wall at the root of the jet pipe. After the lower end of the jet pipe passes through the guide plate, it is connected to the high-pressure air pipe through a backflush pipe. A backflush valve is provided on the backflush pipe. There is a gap between the edge of the guide air disc and the guide plate.

2. The pneumatic spraying device for high water absorption inhibitor in mines according to claim 1, characterized in that: The drive mechanism includes a pneumatic motor and a reducer. The pneumatic motor drives the feed screw through the reducer. The pneumatic motor has an air inlet and an air outlet. Its air inlet is connected to the high-pressure air pipe used in the well through a drive air pipe. The drive air pipe is equipped with a pneumatic motor regulating valve.

3. The pneumatic spraying device for high water absorption inhibitor in mines according to claim 2, characterized in that: It also includes an electrical control box, which houses an industrial control computer and a control panel. The control panel includes a display screen, a pneumatic motor regulating valve knob, a water inlet valve regulating knob, a material blowing valve regulating knob, and a shut-off valve button. A water pressure gauge is installed on the water inlet pipe, and an air pressure gauge is installed on the material blowing pipe. The flow meter on the water inlet pipe is an electronic flow meter. The pneumatic motor also has a speed sensor. The speed sensor and the flow meter are respectively connected to the signal input terminal of the industrial control computer. The pneumatic motor regulating valve knob, the water inlet valve regulating knob, the material blowing valve regulating knob, and the shut-off valve button are respectively connected to the control panel of the industrial control computer. The signal input terminal is connected, and the shut-off valve is a normally closed shut-off valve. This normally closed shut-off valve, along with the pneumatic motor regulating valve, the water inlet regulating valve, and the blowing air regulating valve, are all electromagnetic remote control valves or electric remote control valves. The aforementioned electromagnetic remote control valves or electric remote control valves are respectively connected to the control signal output terminal of the industrial control computer through control signal lines. The industrial control computer calculates the actual feeding speed of the solid superabsorbent inhibitor based on the actual rotation speed of the pneumatic motor, and then calculates the optimal water inlet flow rate required to prepare the superabsorbent inhibitor colloid based on the actual feeding speed of the solid superabsorbent inhibitor, and displays it on the display screen synchronously with the actual water inlet flow rate.

4. The pneumatic spraying device for high water absorption inhibitor in mines according to claim 3, characterized in that: The blowing air duct is also equipped with a pressure stabilizing valve, which is located upstream of the blowing air regulating valve. The air pressure gauge is equipped with an air pressure sensor, and the water pressure gauge is equipped with a water pressure sensor. The water pressure sensor and the air pressure sensor are respectively connected to the signal input terminal of the industrial control computer. The display screen simultaneously displays the water pressure in the inlet pipe sensed by the water pressure sensor and the air pressure in the blowing air duct sensed by the air pressure sensor.

5. The pneumatic spraying device for high water absorption inhibitor in mines according to claim 1, characterized in that: The high-pressure air duct is also equipped with a high-pressure air main valve, and the water inlet pipe is also equipped with a water inlet main valve. The water inlet main valve is located near the well and is connected to a high-pressure water supply pipe.

6. The method of using the pneumatic spraying device for high water absorption inhibitor in mines according to claim 5, comprising the following steps: ①. Open the closable sealing cap, take a sufficient amount of solid inhibitor, add it into cavity A through the feed port, and then seal the feed port with the closable sealing cap; ②. Transport the pneumatic spraying device for the high water absorption inhibitor of this mine to a suitable location in the underground coal mine, connect the high-pressure air pipe to the underground high-pressure air pipe, and connect the water inlet pipe to the underground high-pressure water supply pipe; ③. Then, the operator holds the spray gun head, aims it at the coal body to be sprayed, starts the industrial control computer, and first opens the high-pressure air main valve. Next, the operator opens the material blowing air regulating valve using the material blowing air valve adjustment knob, gradually opening it to 20% of its opening. The operator then opens the stop valve using the stop valve button, allowing air to be sprayed out from the spray gun head. The operator checks if the spray gun head is unobstructed; if not, it is cleared immediately. After confirming the spray gun head is unobstructed, the operator opens the water inlet regulating valve using the inlet valve adjustment knob, gradually opening it to 20% of its opening, introducing water into the three-phase mixer. The water then flows through the hose and spray gun head. The operator adjusts the opening of the material blowing air regulating valve using the material blowing air valve adjustment knob to ensure the water vapor sprayed from the spray gun head reaches the coal body to be sprayed. ④. Then, open the pneumatic motor regulating valve by turning the knob, gradually opening it to 20% to start the pneumatic motor. The pneumatic motor drives the feeding screw to rotate through the reducer, sending the solid inhibitor into chamber B. Along with the high-pressure air entering chamber B, the inhibitor passes through the outlet at the bottom of chamber B and the air-feed pipe, entering the three-phase mixer. In the three-phase mixer, it is thoroughly mixed with the water supplied from the water inlet pipe, forming a highly absorbent inhibitor colloid. This colloid is then sprayed out through the hose and spray gun nozzle. ⑤. Then, gradually increase the opening of the pneumatic motor regulating valve to 80% using the pneumatic motor regulating valve knob, and observe the actual speed of the pneumatic motor on the display screen. After the pneumatic motor speed stabilizes, gradually increase the opening of the water inlet regulating valve using the water inlet valve regulating knob until the actual water inlet flow rate equals the optimal water inlet flow rate or the difference between the actual water inlet flow rate and the optimal water inlet flow rate does not exceed 5% of the optimal water inlet flow rate. Then, the superabsorbent inhibitor colloid can be continuously and stably output until the pneumatic spraying operation of the inhibitor is completed. ⑥. First, turn off the pneumatic motor by adjusting the pneumatic motor control valve knob. Then, adjust the water inlet control valve to 20% by adjusting the water inlet valve knob. Observe the spray from the nozzle head at all times. After the spray turns into clear water, close the water inlet control valve by adjusting the water inlet valve knob to stop the water supply. Close the main water inlet valve and disconnect the water inlet pipe from the high-pressure water supply pipe in the well. Continue to observe the spray from the nozzle head. After the spray changes from water mist to dry air, continue blowing for 2 minutes. Then, close the blowing air control valve by adjusting the blowing air valve knob. Finally, disconnect the high-pressure air pipe from the high-pressure air pipe in the well.

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