A coal mine underground foaming spraying device

Abstract

The present application provides a kind of coal mine underground foaming spraying equipment, comprising: slurry mixing barrel;Pipe is arranged at the bottom of the one side of slurry mixing barrel.The present application provides a kind of coal mine underground foaming spraying equipment, by slurry mixing barrel, double suction pump, gas circuit mixer, bubble maker, slurry bubble mixer, spray gun, liquid material barrel and pipeline cooperation, equipment volume is small, compact structure, can be sprayed distance greater than 30m, wherein bubble maker in bubble element, slurry bubble mixer in agitator independent research and development small volume parts, overall volume is small, it is convenient to use replacement, equipment uses double suction pump, it is suitable for suction viscous slurry, maximum pressure can reach 3MPa, solve the demand of coal mine underground physical foaming equipment, equipment reaches suction viscous slurry, slurry pressure is big, long-distance injection requirement, slurry output and liquid output are stable, improve the stability of spraying, equipment overall volume is small, meet the requirement of small size of coal mine underground equipment.

Description

Technical Field

[0001] This invention relates to the field of underground foaming spraying equipment for coal mines, and more particularly to an underground foaming spraying equipment for coal mines. Background Technology

[0002] Existing underground foaming spraying equipment in coal mines all use polyurethane chemical foaming equipment. The raw materials for polyurethane chemical foaming are two liquids, which are simultaneously drawn in and discharged by a high-pressure dual-liquid pump, and then mixed and sprayed out from the nozzle. The raw materials for physical cement slurry foaming are slurry and liquid, and the preparation principles are fundamentally different. There is currently no matching equipment. Due to its flammability, polyurethane organic foaming is being phased out, and physical foaming spraying is becoming the trend.

[0003] Coal mine underground spaces are relatively narrow and long, while physical foaming spraying equipment is generally large in size and cannot meet the needs of long-distance spraying, making it impractical. At the same time, physical foaming slurry is relatively viscous during foaming, making it difficult to be sucked out, resulting in low slurry pressure and unstable slurry output efficiency.

[0004] Therefore, it is necessary to provide a foaming spraying equipment for underground coal mines to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention provides a foaming spraying device for underground coal mines, which solves the problems that physical foaming spraying devices are generally large in size and cannot meet the needs of long-distance spraying, resulting in poor practicality. At the same time, the physical foaming slurry is relatively viscous during foaming, making it difficult to be sucked out, resulting in low slurry pressure and unstable slurry output efficiency.

[0006] To solve the above-mentioned technical problems, the present invention provides a foaming spraying equipment for underground coal mines, comprising: a slurry mixing tank;

[0007] The pipeline is located at the bottom of one side of the slurry mixing tank, and a double suction pump is installed at the other end of the pipeline. A liquid tank is installed on the other side of the double suction pump.

[0008] An air-path mixer is located on the other side of the slurry mixing tank. A spray gun is provided on one side of the air-path mixer, with an atomizing power inlet on one side and an atomizing port on the other side. A slurry inlet is provided on one side of the bottom of the spray gun. A foam maker is provided on the other side of the air-path mixer, and a slurry-foam mixer is provided on the other side of the foam maker. A foam inlet is provided on one side of the slurry-foam mixer, and a slurry outlet is provided on the other side. An agitator is provided inside the slurry-foam mixer, and a slurry inlet is provided on one side of the top of the slurry-foam mixer.

[0009] Preferably, a pneumatic actuator is provided at the top of the slurry mixing tank, an air volume control valve is provided on one side of the pneumatic actuator, and a slurry flow control valve is provided at the bottom of one side of the slurry mixing tank.

[0010] Preferably, a slurry pump is provided on one side of the dual suction pump, and a slurry discharge control valve is provided on the other side of the slurry pump. A slurry flow stabilizer is provided on the top of the slurry discharge control valve. A liquid pump is provided on the other side of the dual suction pump, and a liquid discharge control valve is provided on the other side of the liquid pump. A liquid flow stabilizer is provided on the top of the liquid discharge control valve.

[0011] Preferably, a first pressure regulating valve is provided on one side of the gas mixer, a first gas volume regulating valve is provided on the other side of the first pressure regulating valve, a second pressure regulating valve is provided on the other side of the gas mixer, and a second gas volume regulating valve is provided on the other side of the second pressure regulating valve.

[0012] Preferably, the foam maker has a power end on one side, a foam outlet end on the other side, a foam-making element inside, and a liquid inlet end on one side of the bottom of the foam maker.

[0013] Preferably, a stirring trough is provided in the middle of the top of the slurry mixing tank, a fixing plate is fixedly installed on the top of the inner cavity of the stirring trough, a first stirring device is provided in the middle of the bottom of the slurry mixing tank, a second stirring device is rotatably installed on all four sides of the top of the fixing plate, a protective box is fixedly installed on the outer surface of the servo motor, and support feet are fixedly installed on all four sides of the bottom of the slurry mixing tank.

[0014] Preferably, the first stirring device includes a servo motor, the output shaft of the servo motor is fixedly connected to a stirring rod, a first stirring plate is fixedly installed on the outer surface of the stirring rod, and a drive gear is fixedly installed on the bottom of the outer surface of the stirring rod.

[0015] Preferably, the second stirring device includes a rotating rod, a driven gear is fixedly installed at the bottom of the outer surface of the rotating rod, and a second stirring plate is fixedly installed at the top of the outer surface of the rotating rod.

[0016] Preferably, the driving gear rotates in mesh with the driven gear.

[0017] Preferably, the rotation of the second stirring plate does not affect the rotation of the first stirring plate.

[0018] Compared with related technologies, the foaming spraying equipment for underground coal mines provided by this invention has the following beneficial effects:

[0019] This invention provides a foaming spraying device for underground coal mines. The device comprises a slurry mixing tank, a dual-suction pump, an air mixer, a foam maker, a slurry-foam mixer, a spray gun, a liquid tank, and pipelines. The device is small in size and compact in structure, with a spraying distance exceeding 30 meters. The foaming element in the foam maker and the agitator in the slurry-foam mixer are independently developed small-volume parts, resulting in a compact overall size and ease of use and replacement. The device uses a dual-suction pump, suitable for drawing viscous slurries, with a maximum pressure reaching 3 MPa. This addresses the needs of physical foaming equipment in underground coal mines, achieving the requirements for drawing viscous slurries, high slurry pressure, and long-distance spraying. The stable slurry and liquid output improves spraying stability. The overall small size of the device meets the requirements for small-size equipment in underground coal mines. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a first embodiment of a foaming spraying device for underground coal mines provided by the present invention;

[0021] Figure 2 for Figure 1 The diagram shows the structure of the slurry mixing tank.

[0022] Figure 3 for Figure 1 The diagram shows the structure of the dual-suction pump.

[0023] Figure 4 for Figure 1 The diagram shows the structure of the gas mixer.

[0024] Figure 5 for Figure 1 The diagram shows the structure of the bubble maker.

[0025] Figure 6 for Figure 1 The diagram shows the structure of the bubble mixer.

[0026] Figure 7 for Figure 1 The diagram shows the structure of the spray gun.

[0027] Figure 8 This is a schematic diagram of the structure of a second embodiment of a foaming spraying device for underground coal mines provided by the present invention;

[0028] Figure 9 for Figure 8 The diagram shows a cross-sectional view of the slurry mixing tank.

[0029] Figure 10 for Figure 9 The enlarged schematic diagram at point A is shown.

[0030] The diagram is labeled as follows: 1. Slurry mixing tank; 101. Pneumatic actuator; 102. Air volume control valve; 103. Slurry flow control valve; 2. Dual suction pump; 21. Slurry discharge control valve; 22. Slurry flow stabilizer; 23. Suction pump; 24. Liquid suction pump; 25. Liquid flow stabilizer; 26. Liquid discharge control valve; 3. Air mixer; 31. First air pressure regulating valve; 32. First air volume regulating valve; 33. Second air pressure regulating valve; 34. Second air volume regulating valve; 4. Foam maker; 41. Power end; 42. Liquid inlet end; 43. Foaming element; 44. Foam outlet end. 5. Pulp mixer; 51. Foam inlet; 52. Pulp inlet; 53. Agitator; 54. Mixed slurry outlet; 6. Spray gun; 61. Spray gun atomization power inlet; 62. Mixed slurry inlet; 63. Atomization port; 7. Liquid tank; 8. Pipeline; 9. Mixing tank; 10. Fixing plate; 11. First mixing device; 111. Servo motor; 112. Mixing rod; 113. First mixing plate; 114. Drive gear; 12. Second mixing device; 121. Rotating rod; 122. Second mixing plate; 123. Driven gear; 13. Support leg; 14. Protective box. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 ,in, Figure 1 This is a schematic diagram of the structure of a first embodiment of a foaming spraying device for underground coal mines provided by the present invention; Figure 2 for Figure 1 The diagram shows the structure of the slurry mixing tank. Figure 3 for Figure 1 The diagram shows the structure of the dual-suction pump. Figure 4 for Figure 1 The diagram shows the structure of the gas mixer. Figure 5 for Figure 1 The diagram shows the structure of the bubble maker.

[0033] Figure 6 for Figure 1 The diagram shows the structure of the bubble mixer. Figure 7 for Figure 1 The diagram shows the structure of a spray gun. A foaming spraying device for underground coal mines includes: a slurry mixing tank 1;

[0034] Pipeline 8 is located at the bottom of one side of the slurry mixing tank 1, and a double suction pump 2 is provided at the other end of the pipeline 8. A liquid tank 7 is provided on the other side of the double suction pump 2.

[0035] An air-path mixer 3 is located on the other side of the slurry mixing tank 1. A spray gun 6 is provided on one side of the air-path mixer 3. A spray gun atomization power inlet 61 is provided on one side of the spray gun 6. An atomization port 63 is provided on the other side of the spray gun 6. A slurry mixing inlet 62 is provided on one side of the bottom of the spray gun 6. A foam maker 4 is provided on the other side of the air-path mixer 3. A slurry-foam mixer 5 is provided on the other side of the foam maker 4. A foam inlet end 51 is provided on one side of the slurry-foam mixer 5. A slurry mixing outlet 54 is provided on the other side of the slurry-foam mixer 5. An agitator 53 is provided inside the slurry-foam mixer 5. A slurry inlet end is provided on one side of the top of the slurry-foam mixer 5.

[0036] A pneumatic actuator 101 is provided on the top of the slurry mixing tank 1, an air volume control valve 102 is provided on one side of the pneumatic actuator 101, and a slurry flow control valve 103 is provided at the bottom of one side of the slurry mixing tank 1.

[0037] A slurry pump 23 is provided on one side of the dual suction pump 2, and a slurry discharge control valve 21 is provided on the other side of the slurry pump 23. A slurry flow stabilizer 22 is provided on the top of the slurry discharge control valve 21. A liquid suction pump 24 is provided on the other side of the dual suction pump 2, and a liquid discharge control valve 26 is provided on the other side of the liquid suction pump 24. A liquid flow stabilizer 25 is provided on the top of the liquid discharge control valve 26.

[0038] A first pressure regulating valve 31 is provided on one side of the gas mixer 3, a first gas volume regulating valve 32 is provided on the other side of the first pressure regulating valve 31, a second pressure regulating valve 33 is provided on the other side of the gas mixer 3, and a second gas volume regulating valve 34 is provided on the other side of the second pressure regulating valve 33.

[0039] The foam maker 4 has a power end 41 on one side and a foam outlet end 44 on the other side. The foam maker 4 has a foaming element 43 inside and a liquid inlet end 42 on one side of the bottom.

[0040] Slurry is prepared in slurry mixing tank 1. During slurry preparation, slurry flow control valve 103 is closed, and air volume control valve 102 is adjusted to regulate the stirring speed. After slurry preparation is completed, the stirring speed is reduced and slurry flow control valve 103 is opened. Slurry is drawn in by the left suction pump 23 of the double suction pump 2, passes through slurry flow stabilizer 22 and slurry output control valve 21, and enters the slurry inlet 52 of the slurry-foam mixer 5. Liquid is prepared in liquid tank 7. After liquid preparation is completed, it is placed in pipeline 8 so that the right suction pump 24 of the double suction pump 2 draws in liquid, passes through liquid flow stabilizer 25 and liquid output control valve 26, and enters the liquid inlet 42 of the foam maker 4. Bubbles are formed at the foam outlet 44 by the foaming element 43 and enter the pipeline to the foam inlet 51 of the slurry-foam mixer 5. The bubbles and slurry are mixed evenly by the agitator 53 and reach the mixed slurry outlet 54. Through the pipeline, they reach the mixed slurry inlet 62 of the spray gun 6. The atomizing power inlet 61 of the spray gun pushes the mixed slurry atomized and sprayed out.

[0041] The working principle of the underground foaming spraying equipment for coal mines provided by this invention is as follows:

[0042] During operation, the slurry mixing tank 1 is used for slurry preparation, and the liquid tank 7 is used for liquid preparation. The slurry is drawn into the pump body by the double suction pump 2 through the pipeline 8. The left pump body 23 is the slurry suction pump, which draws in the slurry and delivers it to the slurry-foam mixer 5 through the pipeline. The right pump body 24 is the liquid suction pump, which draws in the liquid and delivers it to the foam maker 4 through the pipeline. The generated foam enters the slurry-foam mixer 5 through the pipeline. After mixing, the slurry is transported to the spray gun through the pipeline.

[0043] The slurry mixing tank 1 is composed of a pneumatic actuator 101, an air volume control valve 102, and a slurry flow control valve 103. It has a small overall size and compact structure, and can prepare 120kg of slurry at a time. The mixing speed is adjustable from 0 to 360r / min.

[0044] The dual suction pump 2 consists of a slurry flow control valve 21, a slurry flow stabilizer 22, a slurry suction pump 23, a liquid suction pump 24, a liquid flow stabilizer 25, and a liquid flow control valve 26. The slurry flow and liquid flow are adjusted according to the required slurry flow rate. The conventional slurry flow rate is 0.6 m3 / h, and the liquid flow rate is 0.2 m3 / h. The flow stabilizer stabilizes the flow rate to make the mixing more uniform.

[0045] The air mixer 3 consists of a first air pressure regulating valve 31, a first air volume regulating valve 32, a second air pressure regulating valve 33, and a second air volume regulating valve 34. The first air pressure regulating valve 31 provides the foaming power, and stable power can make the foaming effect reach the best. The pressure value of the first air pressure regulating valve 31 is 0.4MPa and the flow rate is 0.4m3 / min. The first air volume regulating valve 32 provides the atomization power of the spray gun. Stable pressure and flow rate can make the atomization effect of the spray gun reach the best and the coating smoothness is higher. The pressure value of the first air volume regulating valve 32 is 0.05MPa and the flow rate is 0.1m3 / min.

[0046] The foaming power provided by the first gas volume regulating valve 32 enters the power end 41 and enters the slurry to form bubbles in the foaming element 43.

[0047] The slurry mixer 5 consists of a bubble inlet 51, a slurry inlet 52, a stirrer 53, and a mixed slurry outlet 54. The slurry inlet adopts a 45° inclined structure, which makes the slurry inlet pipe smoother and prevents back pressure and backflow.

[0048] The spray gun 6 consists of a spray gun atomizing power inlet 61, a mixing slurry inlet 62, and an atomizing port 63.

[0049] The first air pressure regulating valve 31, the first air volume regulating valve 32, the second air pressure regulating valve 33, the second air volume regulating valve 34, the slurry output control valve 24, and the liquid output control valve 26 in the air mixer 3 are adjusted according to the slurry flow rate. Under the condition that the flow rate is constant, it only needs to be adjusted once when used for the first time. After adjustment, it is locked and can be used stably.

[0050] Compared with related technologies, the foaming spraying equipment for underground coal mines provided by this invention has the following beneficial effects:

[0051] This invention provides a foaming spraying device for underground coal mines. The device comprises a slurry mixing tank 1, a dual-suction pump 2, an air mixer 3, a foam maker 4, a slurry-foam mixer 5, a spray gun 6, a liquid tank 7, and pipelines 8, all working in concert. The device is small in size and compact in structure, with a spraying distance exceeding 30 meters. The foaming element 43 in the foam maker 4 and the agitator 53 in the slurry-foam mixer 5 are independently developed small-volume parts, contributing to the overall small size and ease of use and replacement. The dual-suction pump 2 is suitable for suctioning viscous slurries, with a maximum pressure reaching 3 MPa. This addresses the needs of physical foaming equipment in underground coal mines, achieving the requirements for suctioning viscous slurries, high slurry pressure, and long-distance spraying. The stable slurry and liquid output improves spraying stability. The overall small size of the device meets the requirements for small-size equipment in underground coal mines.

[0052] Second Embodiment

[0053] Please refer to the following: Figure 8 , Figure 9 and Figure 10 Based on the first embodiment of this application, which provides a foaming spraying device for underground coal mines, the second embodiment of this application proposes another foaming spraying device for underground coal mines. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0054] Specifically, the second embodiment of this application provides a different type of foaming spraying equipment for underground coal mines. In this equipment, a mixing tank 1 has a mixing trough 9 in the middle of its top, a fixing plate 10 is fixedly installed on the top of the inner cavity of the mixing trough 9, a first mixing device 11 is provided in the middle of the bottom of the mixing tank 1, a second mixing device 12 is rotatably installed on all four sides of the top of the fixing plate 10, a protective box 14 is fixedly installed on the outer surface of the servo motor 111, and support feet 13 are fixedly installed on all four sides of the bottom of the mixing tank 1.

[0055] The first stirring device 11 includes a servo motor 111, the output shaft of which is fixedly connected to a stirring rod 112. A first stirring plate 113 is fixedly installed on the outer surface of the stirring rod 112, and a drive gear 114 is fixedly installed on the bottom of the outer surface of the stirring rod 112.

[0056] The second stirring device 12 includes a rotating rod 121, a driven gear 123 is fixedly installed on the bottom of the outer surface of the rotating rod 121, and a second stirring plate 122 is fixedly installed on the top of the outer surface of the rotating rod 121.

[0057] When the driving gear 114 rotates, it meshes with the driven gear 123 and rotates.

[0058] The rotation of the second stirring plate 122 does not affect the rotation of the first stirring plate 113.

[0059] The driving gear 114 rotates and meshes with the driven gear 123 around it. The driven gear 123 drives the rotating rod 121 to rotate in the opposite direction to the rotation direction of the driving gear 114, so that the first stirring plate 113 and the second stirring plate 122 rotate in opposite directions.

[0060] The working principle of the underground foaming spraying equipment for coal mines provided by this invention is as follows:

[0061] During operation, the output shaft of the servo motor 111, controlled by the external power supply, rotates to drive the stirring rod 112, the first stirring plate 113, and the drive gear 114. The drive gear 114 meshes with the driven gear 123 to drive the rotating rod 121 and the second stirring plate 122 to rotate. The rotation of the first stirring plate 113 and the second stirring plate 122 mixes the slurry inside the mixing tank 9.

[0062] Compared with related technologies, the foaming spraying equipment for underground coal mines provided by this invention has the following beneficial effects:

[0063] This invention provides a foaming spraying device for underground coal mines. An external power source controls the output shaft of a servo motor 111 to rotate, driving a stirring rod 112, a first stirring plate 113, and a drive gear 114. The drive gear 114 meshes with a driven gear 123, driving a rotating rod 121 and a second stirring plate 122 to rotate. The rotation of the first stirring plate 113 and the second stirring plate 122 mixes the slurry inside the mixing tank 9. This device has a simple structure and strong practicality. Four sets of second stirring devices 12 and one set of first stirring devices 11 stir and mix the slurry in opposite directions inside the mixing tank 9, improving the mixing effect.

[0064] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A foaming spraying equipment for underground coal mines, characterized in that, include: Slurry mixing tank; The pipeline is located at the bottom of one side of the slurry mixing tank, and a double suction pump is installed at the other end of the pipeline. A liquid tank is installed on the other side of the double suction pump. An air-path mixer is located on the other side of the slurry mixing tank. A spray gun is provided on one side of the air-path mixer, with an atomizing power inlet on one side of the spray gun and an atomizing port on the other side. A slurry inlet is provided on one side of the bottom of the spray gun. A foam maker is provided on the other side of the air-path mixer, and a slurry-foam mixer is provided on the other side of the foam maker. A foam inlet is provided on one side of the slurry-foam mixer, and a slurry outlet is provided on the other side. An agitator is provided inside the slurry-foam mixer, and a slurry inlet is provided on one side of the top of the slurry-foam mixer. The top of the slurry mixing tank is equipped with a pneumatic actuator. A slurry pump is installed on one side of the dual suction pump, and a liquid pump is installed on the other side of the dual suction pump. A first air pressure regulating valve is installed on one side of the air mixer, which provides foaming power. A second air pressure regulating valve is installed on the other side of the air mixer, which provides atomizing power for the spray gun. A power end is installed on one side of the foam maker, and a foam outlet end is installed on the other side of the foam maker. A foaming element is installed inside the foam maker, and a liquid inlet end is installed on one side of the bottom of the foam maker.

2. The underground foaming spraying equipment for coal mines according to claim 1, characterized in that, A pneumatic actuator is provided with an air volume control valve on one side, and a slurry flow control valve is provided at the bottom of one side of the slurry mixing tank.

3. The underground foaming spraying equipment for coal mines according to claim 1, characterized in that, A slurry discharge control valve is provided on the other side of the slurry pump, and a slurry flow stabilizer is provided on the top of the slurry discharge control valve. A liquid discharge control valve is provided on the other side of the liquid pump, and a liquid flow stabilizer is provided on the top of the liquid discharge control valve.

4. The underground foaming spraying equipment for coal mines according to claim 1, characterized in that, A first air volume regulating valve is provided on the other side of the first air pressure regulating valve, and a second air volume regulating valve is provided on the other side of the second air pressure regulating valve.

5. The underground foaming spraying equipment for coal mines according to claim 4, characterized in that, A mixing trough is provided in the middle of the top of the slurry mixing tank. A fixing plate is fixedly installed on the top of the inner cavity of the mixing trough. A first mixing device is provided in the middle of the bottom of the slurry mixing tank. A second mixing device is rotatably installed around the top of the fixing plate. The first mixing device includes a servo motor. A protective box is fixedly installed on the outer surface of the servo motor. Support feet are fixedly installed around the bottom of the slurry mixing tank.

6. The underground foaming spraying equipment for coal mines according to claim 5, characterized in that, The output shaft of the servo motor is fixedly connected to a stirring rod, a first stirring plate is fixedly installed on the outer surface of the stirring rod, and a drive gear is fixedly installed on the bottom of the outer surface of the stirring rod.

7. A foaming spraying equipment for underground coal mines according to claim 6, characterized in that, The second stirring device includes a rotating rod, a driven gear is fixedly installed at the bottom of the outer surface of the rotating rod, and a second stirring plate is fixedly installed at the top of the outer surface of the rotating rod.

8. The underground foaming spraying equipment for coal mines according to claim 7, characterized in that, When the driving gear rotates, it meshes with the driven gear and rotates.

9. A foaming spraying equipment for underground coal mines according to claim 7, characterized in that, The rotation of the second stirring plate does not affect the rotation of the first stirring plate.

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