A dustproof spraying device for a fully mechanized coal mining face

Abstract

The utility model relates to the technical field of coal mine fully mechanized working face dustproof spraying device, and disclose a coal mine fully mechanized working face dustproof spraying device, including the bottom plate, the top of bottom plate is fixedly connected with the water tank, the both sides of bottom plate top are all provided with a plurality of spray heads, the top of bottom plate is provided with the lifting assembly for adjusting the height of spray head, the top of bottom plate is provided with dustproof assembly for playing the protection effect to spray head. The coal mine fully mechanized working face dustproof spraying device, through the setting of dustproof assembly, can make the frame and spray head move upwards by lifting assembly, in this process, the abutting wheel on the L-shaped plate will ascend synchronously with the frame, and continuously abut the arc plate, make the arc plate keep the state of opening to both sides, at this moment, the spring loses the restraint of abutting force, and is reset and pushes the arc plate to move to the middle, until the sealing cloth is consistent with the corresponding spray head water outlet hole, and then can isolate the contact of coal dust, rock debris and other impurities and spray head, prevent the spray head hole from being blocked.

Description

Technical Field

[0001] This utility model relates to the field of dust suppression spray technology, and in particular to a dust suppression spray device for fully mechanized coal mining faces. Background Technology

[0002] Fully mechanized coal mining is a general term for coal mining with a mechanization rate of over 95%. Specifically, it refers to a longwall mining method involving underground mining. It is suitable for stable coal seams, hard roofs, and gently dipping medium-thick coal seams without faults, as well as layered longwall mining of thick coal seams. Hydraulic supports, scraper conveyors, and drum shearers are arranged in the longwall mining face. Roadway transfer conveyors and extendable belt conveyors are arranged in the transport roadway. The mining face is often arranged in an extra-long configuration, with the face length equivalent to two mining faces. Two mining machines ride on the same scraper conveyor, cutting the upper and lower halves of the coal face respectively. Alternatively, an intermediate roadway can be arranged in the middle of the extra-long mining face as a transport roadway. One scraper conveyor is arranged in each of the upper and lower halves of the mining face, transporting the coal in opposite directions, forming a counter-pull mining face.

[0003] However, the dust suppression spray device for the fully mechanized coal mining face has the following disadvantages:

[0004] (1) When the spraying device is idle, the nozzle is directly exposed to the harsh environment of the fully mechanized mining face. Coal dust, rock chips and other impurities can easily enter the nozzle holes, causing the nozzle to become blocked, affecting the subsequent use effect, and even requiring the nozzle to be replaced, increasing the use cost.

[0005] (2) The installation height of existing devices is mostly fixed and cannot be flexibly adjusted according to the actual dust prevention needs such as the mining progress of the fully mechanized mining face, the amount of dust generated and the diffusion height. When the dust diffusion height does not match the spray height, the dust prevention range is limited, the targeting and effectiveness of spray dust reduction are greatly reduced, and it is difficult to achieve the ideal dust prevention effect. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] The technical problem solved by this utility model is to provide a dust suppression spray device for fully mechanized coal mining faces that is highly practical, easy to operate, and has a simple structure. This solves the problems mentioned in the background art, such as the nozzles being directly exposed to the harsh environment of the fully mechanized mining face, the easy entry of impurities such as coal dust and rock cuttings into the nozzle holes, and the inability to flexibly adjust the device according to the actual dust suppression needs such as the mining progress, dust generation, and diffusion height of the fully mechanized mining face.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model is implemented through the following technical solution: a dust suppression spray device for a fully mechanized coal mining face, comprising a base plate, a water tank fixedly connected to the top of the base plate, a plurality of nozzles on both sides of the top of the base plate, a lifting assembly for adjusting the height of the nozzles on the top of the base plate, and a dust suppression assembly for protecting the nozzles on the top of the base plate.

[0010] The lifting assembly includes support bars fixedly connected to the four corners of the top of the base plate. A frame is provided at the top of the base plate. The inner walls of the frame are slidably connected to the support bars. A square pipe is fixedly connected to the inner wall of the frame. Two diagonal support bars have mounting grooves inside. A threaded rod is rotatably installed inside one of the mounting grooves. A limit rod is fixedly connected inside the other mounting groove. The threaded rod is threadedly connected to the frame. The limit rod is slidably connected to the frame.

[0011] The dustproof assembly includes a protective box fixedly connected between the tops of four support bars. Several pull rods are slidably connected to both sides inside the protective box. An arc-shaped plate is fixedly connected between one end of the pull rods. Springs are sleeved on the outer periphery of each pull rod. Sealing cloths are fixedly connected to the opposite sides of two arc-shaped plates. An abutment wheel is provided at the top of the frame.

[0012] Optionally, L-shaped plates are fixedly connected to both sides of the frame, and the abutting wheels are rotatably installed inside the L-shaped plates. The abutting wheels abut against the corresponding arc-shaped plates, which can synchronously control the opening and closing of the arc-shaped plates when the frame is raised and lowered, without the need for additional driving components.

[0013] Optionally, two corrugated pipes are fixedly connected to the top of the water tank, and a water inlet pipe is fixedly connected to the top of each corrugated pipe. The end of the water inlet pipe away from the corrugated pipe extends into the interior of the square pipe. The corrugated pipes can flexibly extend and retract with the lifting and lowering of the frame, avoiding the water pipe from breaking or twisting due to the movement of the frame.

[0014] Optionally, a servo motor is fixedly installed inside one of the support bars. The output shaft of the servo motor is fixedly connected to the rotation shaft of the threaded rod, which can precisely control the rotation angle of the threaded rod, thereby realizing precise adjustment of the frame lifting height.

[0015] Optionally, two water pumps are fixedly installed inside the water tank, and the output ends of the water pumps are fixedly connected to corresponding corrugated pipes, which not only saves water resources, but also enhances the dust suppression effect through dual-path spraying when the dust concentration is high.

[0016] Optionally, casters are rotatably installed at the four corners of the bottom of the base plate, a water inlet pipe is fixedly connected to the top of the water tank, and a push handle is fixedly connected to the top of the base plate. The casters and the push handle work together to allow the device to move flexibly in the fully mechanized mining face, facilitating dust prevention operations in different working areas.

[0017] (III) Beneficial Effects

[0018] This utility model provides a dust suppression spray device for fully mechanized coal mining faces, which has the following beneficial effects:

[0019] 1. The dust suppression spray device for the fully mechanized coal mining face, through the setting of the dust suppression components, can use the lifting components to move the frame and nozzles upward. During this process, the contact wheel on the L-shaped plate will rise synchronously with the frame and continuously contact the arc plate, keeping the arc plate open to both sides. At this time, the spring loses its resistance force, elastically resets, and pushes the arc plate to move towards the middle until the sealing cloth is in contact with the corresponding nozzle water outlet, thereby isolating coal dust, rock chips and other impurities from contacting the nozzle and preventing the nozzle holes from being blocked.

[0020] 2. The dust suppression spray device for the fully mechanized coal mining face, through the setting of the lifting component, can drive the threaded rod to rotate through the rotation of the output shaft of the servo motor, while the limiting rod in the other diagonal support bar will guide and limit the frame, thereby driving the frame to rise vertically along the support bar until the height of the nozzle is adapted to the dust diffusion height of the fully mechanized mining face, so as to achieve the best performance of the device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0022] Figure 2 This is a schematic diagram of the lifting component of this utility model;

[0023] Figure 3 This is a schematic diagram of the dustproof component of this utility model;

[0024] Figure 4 This is a partial schematic diagram of the present invention.

[0025] In the diagram: 1. Base plate; 2. Water tank; 3. Water inlet pipe; 4. Lifting assembly; 401. Frame; 402. Support bar; 403. Square pipe; 404. Threaded rod; 405. Limiting rod; 5. Dustproof assembly; 501. Protective box; 502. Arc plate; 503. Sealing cloth; 504. Pull rod; 505. Spring; 506. Abutment wheel; 6. Water inlet pipe; 7. Servo motor; 8. Corrugated pipe; 9. Universal wheel; 10. L-shaped plate; 11. Nozzle. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] Please see Figures 1 to 4 This utility model provides a technical solution: a dust suppression spray device for a fully mechanized coal mining face, including a base plate 1, a water tank 2 fixedly connected to the top of the base plate 1, several nozzles 11 on both sides of the top of the base plate 1, a lifting assembly 4 for adjusting the height of the nozzles 11 on the top of the base plate 1, and a dust suppression assembly 5 for protecting the nozzles 11 on the top of the base plate 1; the base plate (1): is made of Q235 low carbon steel plate, and the surface is treated by sandblasting and rust removal + epoxy zinc-rich primer + chlorinated rubber topcoat (total coating thickness ≥80μm), which has good impact resistance and coal dust corrosion resistance; the base plate size is 1200mm×600mm×8mm, and universal wheel mounting holes are reserved at the four corners of the bottom, the hole spacing is adapted to the universal wheel (9) to ensure safety. The installation is stable; the water tank (2) is made of 304 stainless steel plate welded and formed, with a plate thickness of 3mm and a volume of 500L. The inner wall is passivated to prevent water quality oxidation and pollution; the top of the water tank has a reserved inlet pipe (3) interface (pipe diameter DN50) and a corrugated pipe (8) connection port (pipe diameter DN32). A drain valve (pipe diameter DN25) is set on the lower side for easy regular cleaning and sewage discharge; the nozzle (11) is made of brass (H62) with chrome plating on the surface, which is wear-resistant and not easy to scale; the nozzle type is a high-pressure atomizing nozzle with an adjustable spray angle of 60°-90°, a working pressure of 0.8-1.2MPa, a single nozzle flow rate of 1.5-2.0L / min, and 6 nozzles are evenly set on each side with a spacing of 150mm to ensure that the spray coverage is continuous and without dead corners.

[0028] The lifting assembly 4 includes support bars 402 fixedly connected to the four corners of the top of the base plate 1. A frame 401 is provided at the top of the base plate 1. The inner walls of the frame 401 are slidably connected to the support bars 402. A square pipe 403 is fixedly connected to the inner wall of the frame 401. The two diagonal support bars 402 have mounting grooves inside. A threaded rod 404 is rotatably installed inside one mounting groove, and a limit rod 405 is fixedly connected inside the other mounting groove. The threaded rod 404 is threadedly connected to the frame 401, and the limit rod 405 is slidably connected to the frame 401. When the device needs to perform dust prevention operations, the output shaft of the servo motor 7 can be rotated to drive the threaded rod 404 to rotate. The limit rod 405 in the other diagonal support bar 402 will guide and limit the frame 401, thereby driving the frame 401 to rise vertically along the support bars 402 until the height of the nozzle 11 is adapted to the dust diffusion height of the fully mechanized mining face, thus achieving the best performance of the device. Support bar (402): Made of 20# seamless steel pipe, with an outer diameter of 50mm, a wall thickness of 5mm, and a length of 1800mm. The bottom is fully welded to the base plate (1), and the welding strength is ≥150MPa. Two diagonal support bars have installation grooves (groove width 30mm, groove depth 20mm) inside for installing threaded rods (404) and limit rods (405). Frame (401): Made of rectangular steel pipe (material Q235) welded together. The frame size matches the base plate (1) (1180mm×580mm). mm), steel pipe section 20mm×40mm, wall thickness 3mm, inner wall welded sliding sleeve (material polytetrafluoroethylene, thickness 5mm) to ensure smooth sliding and wear resistance with support bar (402); threaded rod (404): made of No. 45 steel, heat treated (hardness HB220-250), thread specification M30×2, length 1700mm, bottom is rotatably connected to support bar (402) through deep groove ball bearing (model 6206), and a limit block is set at the top to prevent frame (401) from falling out.

[0029] The dustproof component 5 includes a protective box 501 fixedly connected between the tops of four support bars 402. Several pull rods 504 are slidably connected to both sides inside the protective box 501. An arc-shaped plate 502 is fixedly connected to one end of each pull rod 504. Springs 505 are fitted around the outer periphery of each pull rod 504. Sealing cloths 503 are fixedly connected to opposite sides of the two arc-shaped plates 502. An abutment wheel 506 is provided at the top of the frame 401. When the device is idle after operation, the lifting component 4 can be used to... As the frame 401 and nozzle 11 move upward, the abutting wheel 506 on the L-shaped plate 10 rises synchronously with the frame 401 and continuously abuts the arc plate 502, keeping the arc plate 502 open to both sides. At this time, the spring 505 loses its abutting force, elastically resets, and pushes the arc plate 502 to move towards the center until the sealing cloth 503 fits against the corresponding nozzle 11 water outlet hole, thereby isolating impurities such as coal dust and rock chips from contact with the nozzle 11 and preventing the nozzle 11 hole from becoming blocked. Arc plate (502): Made of 2mm thick Q235 steel plate bent into shape, with an arc curvature radius of 200mm, which is compatible with the distribution trajectory of the nozzle (11). A 5mm thick silicone pad (Shore hardness 60±5) is pasted on the inner side to ensure a tight seal. Spring (505): Made of 304 stainless steel compression spring with a wire diameter of 2mm, an outer diameter of 10mm, a free length of 80mm, a compression stroke of 30mm, and an elastic coefficient of 5N / mm to ensure stable reset force of the arc plate (502). Sealing cloth (503): Made of PVC coated nylon cloth (thickness 0.5mm, tensile strength ≥20MPa), which is fixed to the arc plate (502) by rivets. It has waterproof, dustproof and wear-resistant properties and can flexibly expand and contract with the opening and closing of the arc plate.

[0030] Both sides of the frame 401 are fixedly connected to L-shaped plates 10. The abutting wheels 506 are rotatably installed inside the L-shaped plates 10. The abutting wheels 506 abut against the corresponding arc plates 502. The abutting cooperation between the abutting wheels 506 and the arc plates 502 can synchronously control the opening and closing of the arc plates 502 when the frame 401 is raised and lowered, without the need for additional driving components.

[0031] Two corrugated pipes 8 are fixedly connected to the top of the water tank 2. A water inlet pipe 6 is fixedly connected to the top of each corrugated pipe 8. The end of the water inlet pipe 6 away from the corrugated pipe 8 extends into the interior of the square pipe 403. The corrugated pipe 8 can flexibly extend and retract with the lifting and lowering of the frame 401, thus avoiding the water pipe from breaking or twisting due to the movement of the frame 401.

[0032] One of the support bars 402 has a servo motor 7 fixedly installed inside. The output shaft of the servo motor 7 is fixedly connected to the rotation shaft of the threaded rod 404. The servo motor 7 provides stable power to the threaded rod 404 and can accurately control the rotation angle of the threaded rod 404, thereby realizing the precise adjustment of the lifting height of the frame 401.

[0033] Two water pumps are fixedly installed inside the water tank 2. The output end of each water pump is fixedly connected to the corresponding corrugated pipe 8. Single or dual spray can be flexibly controlled according to the actual dust prevention needs, which saves water resources and can enhance the dust reduction effect through dual spray when the dust concentration is high.

[0034] The bottom of the base plate 1 is equipped with four rotatable casters 9 at the four corners. The top of the water tank 2 is fixedly connected to the water inlet pipe 3. The top of the base plate 1 is fixedly connected to the push handle. The casters 9 and the push handle work together to allow the device to move flexibly in the fully mechanized mining face, which is convenient for dust prevention operations in different working areas. The water inlet pipe 3 makes it convenient to replenish water to the water tank 2.

[0035] In this invention, the working steps of the device are as follows:

[0036] First step: When the device needs to perform dust prevention operations, the output shaft of the servo motor 7 can be rotated to drive the threaded rod 404 to rotate. The limiting rod 405 in the other diagonal support bar 402 will guide and limit the frame 401, thereby driving the frame 401 to rise vertically along the support bar 402 until the height of the nozzle 11 is adapted to the dust diffusion height of the fully mechanized mining face, so as to achieve the best performance of the device.

[0037] The second step: When the device is idle after the operation is completed, the lifting component 4 can be used to move the frame 401 and the nozzle 11 upward. During this process, the abutting wheel 506 on the L-shaped plate 10 will rise synchronously with the frame 401 and continuously abut against the arc plate 502, keeping the arc plate 502 open to both sides. At this time, the spring 505 loses its abutting force, elastically resets and pushes the arc plate 502 to move towards the middle until the sealing cloth 503 is in contact with the corresponding nozzle 11 water outlet hole, thereby isolating impurities such as coal dust and rock chips from contact with the nozzle 11 and preventing the nozzle 11 hole from being blocked.

[0038] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0039] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0040] It will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dust suppression spray device for a fully mechanized coal mining face, comprising a base plate (1), characterized in that: A water tank (2) is fixedly connected to the top of the base plate (1). Several nozzles (11) are provided on both sides of the top of the base plate (1). A lifting assembly (4) for adjusting the height of the nozzles (11) is provided on the top of the base plate (1). A dustproof assembly (5) for protecting the nozzles (11) is provided on the top of the base plate (1). The lifting assembly (4) includes support bars (402) fixedly connected to the four corners of the top of the base plate (1). The top of the base plate (1) is provided with a frame (401). The inner walls of the frame (401) are slidably connected to the support bars (402). The inner walls of the frame (401) are fixedly connected with square pipes (403). The support bars (402) at two opposite corners are provided with mounting grooves. A threaded rod (404) is rotatably installed in one of the mounting grooves. A limit rod (405) is fixedly connected in the other mounting groove. The threaded rod (404) is threadedly connected to the frame (401). The limit rod (405) is slidably connected to the frame (401). The dustproof assembly (5) includes a protective box (501) fixedly connected between the tops of four support bars (402). Several pull rods (504) are slidably connected to both sides inside the protective box (501). An arc plate (502) is fixedly connected between one end of the several pull rods (504). A spring (505) is sleeved on the outer periphery of each pull rod (504). A sealing cloth (503) is fixedly connected to the opposite side of each of the two arc plates (502). An abutment wheel (506) is provided at the top of the frame (401).

2. The dust suppression spray device for fully mechanized coal mining faces according to claim 1, characterized in that: Both sides of the frame (401) are fixedly connected to L-shaped plates (10), and the abutting wheels (506) are rotatably installed inside the L-shaped plates (10). The abutting wheels (506) abut against the corresponding arc-shaped plates (502).

3. The dust suppression spray device for fully mechanized coal mining faces according to claim 1, characterized in that: The top of the water tank (2) is fixedly connected to two corrugated pipes (8), and the top of each corrugated pipe (8) is fixedly connected to a water inlet pipe (6). The end of the water inlet pipe (6) away from the corrugated pipe (8) extends into the interior of the square pipe (403).

4. A dust suppression spray device for a fully mechanized coal mining face according to claim 1, characterized in that: One of the support bars (402) has a servo motor (7) fixedly installed inside it, and the output shaft of the servo motor (7) is fixedly connected to the rotation shaft of the threaded rod (404).

5. A dust suppression spray device for fully mechanized coal mining faces according to claim 1, characterized in that: Two water pumps are fixedly installed inside the water tank (2), and the output ends of the water pumps are fixedly connected to the corresponding corrugated pipes (8).

6. A dust suppression spray device for a fully mechanized coal mining face according to claim 1, characterized in that: The bottom of the base plate (1) is equipped with casters (9) at all four corners, the top of the water tank (2) is fixedly connected to a water inlet pipe (3), and the top of the base plate (1) is fixedly connected to a push handle.

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