Combined unblocking system for coal bunker of coal mine

Abstract

The utility model discloses a combined type unblocking system for a coal bunker of a coal mine. The combined type unblocking system comprises a central suspension vibration rod device, a pre-buried hydraulic alligator plate device, a suspension high-pressure water washing, dredging and spraying device, an air cannon device and a large coal gangue circulating cleaning device. According to the utility model, large coal gangue blocks are crushed into small blocks, so that the blockage probability in a coal seam is reduced, the problems of blockage, arching, wall sticking and the like of the coal bunker are solved by adopting a plurality of combined blockage clearing devices, the production interruption caused by the blockage of the coal bunker is reduced, the blockage of the coal bunker is prevented from becoming a neck pinching link for production, and the production continuity is ensured; the production cost is reduced, the labor intensity of workers is reduced, the safety of the workers is ensured, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mine production, and in particular relates to a combined coal mine bunker blocking clearing system for sizing. Background Art

[0002] Underground coal bunkers in coal mines are crucial components of coal production and transportation. They ensure the smooth operation of both mining area and main tunnel transportation, and act as a regulatory element during transportation, improving the reliability of the underground transportation system. Underground coal bunkers are crucial for stabilizing mine production, redirecting coal flow, storing, and loading coal. They play a positive role in ensuring coal product quality and regulating imbalances in coal production at the working face.

[0003] During storage, raw coal in a bunker can adhere to the bunker's inner walls or near the lower opening due to factors such as moisture content, temperature, and the effects of expansive minerals. This can reduce the bunker's usable capacity and even cause blockages. After a bunker blockage occurs, all upstream production systems must shut down while the bunker is cleared, significantly impacting the mine's economic production. Furthermore, the complex environment, long work cycles, and high risk of bunker cleanup can easily lead to safety incidents such as excessive gas levels and casualties. Consequently, bunker blockages have become a major challenge plaguing coal safety and economic production.

[0004] Traditional methods for clearing coal bunker blockages involve placing a number of compressed air tanks at the bottom of the bunker and using air cannons to instantly release compressed air, generating shock waves that disrupt and damage the blockage. Alternatively, workers wearing safety belts enter the bunker through the top or inspection hatch, using pneumatic picks to remove the blockage and firing "paste blasters" on the surface to disrupt and damage the blockage.

[0005] Drawbacks of traditional cleaning methods: Air cannons are used to vibrate and clean coal bunkers after a blockage. However, the air disturbance created by the air cannons can easily cause excessive gas to flow to the gas sensors at the upper bunker opening, causing gas over-limit accidents and impacting normal mine production. The disturbance created by air cannons is limited and only suitable for blockages of loose coal. Raw coal contains moisture and cemented soft rock. The blockage has already solidified and developed a certain strength due to the water and muddy soft rock, making air cannons ineffective at clearing. Alternatively, large blocks of coal may continue to block the lower bunker opening after clearing, preventing effective cleaning. Manual cleaning, currently used by many production mines, presents significant safety risks and low cleaning efficiency. Coal bunkers are typically 10-30 meters high. Manual cleaning involves personnel working above and below the blockage, which can be easily entrapped by sudden collapse. Furthermore, the risk of personnel being crushed by falling equipment, chute cast stone, and concrete walls within the bunker poses a threat to their physical and mental health. To improve blockage clearance efficiency, some mines are illegally using blasting to clear large-scale blockages. Blasting within coal bunkers is a specialized blasting environment. Due to factors such as gas accumulation within the bunker, structural safety, and the difficulty in ensuring the quality of drilling and filling, blasting within the bunker requires the use of the highest-grade, Class 5 explosives. Some mines resort to blasting to clear blockages when the conditions for blasting within the bunker are not met, using a significant safety hazard to address a potential safety issue, which can easily lead to major safety incidents. Utility Model Content

[0006] In order to solve the above technical problems existing in the prior art, the utility model provides a comprehensive, all-round, higher degree of automation, reduced manual labor intensity, and safer and more reliable coal mine coal bunker combined blockage clearing system.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions: a combined coal mine bunker clearing system, including a centrally suspended vibrating rod device, a pre-buried hydraulic crocodile plate device, a suspended high-pressure water flushing and dredging spray device, an air cannon device and a circulating cleaning device for large coal gangue;

[0008] The centrally suspended vibrating rod device is arranged along the vertical centerline of the coal bunker. The upper end of the centrally suspended vibrating rod device is hung and connected to the maintenance I-beam above the upper bunker opening, and the lower end of the centrally suspended vibrating rod device is connected to the upper end of the coal separator set at the center of the lower bunker opening.

[0009] The embedded hydraulic crocodile plate device is arranged on the left and right sides of the lower part of the hyperbolic closing funnel structure above the lower compartment opening;

[0010] The suspended high-pressure water flushing and dredging spray device is installed on the maintenance I-beam of the upper warehouse belt conveyor head chamber above the upper warehouse opening;

[0011] The feeding end of the gravity-sensing coal feeder device is set just below the lower bin opening;

[0012] Air cannon devices are installed on the left and right sides of the coal bunker maintenance platform and on the front and rear sides of the hyperbolic closing funnel structure above the lower bunker opening;

[0013] The device for circulating and cleaning large pieces of coal gangue is installed at the upper storage port.

[0014] The central suspended vibrating rod device includes a vertically arranged steel pipe. The upper end of the steel pipe is connected to the maintenance I-beam through a flexible sling, and the lower end of the steel pipe is connected to the upper end of the coal distributor through a flexible rope. Several vibrating rods are evenly arranged in the middle and lower part of the steel pipe along the height direction, and several linkage rods are evenly arranged on the outer circle of the steel pipe.

[0015] The embedded hydraulic crocodile plate device includes a movable crocodile plate and a reciprocating telescopic hydraulic cylinder. A mounting hole is opened on the lower side wall of the hyperbolic closing funnel structure. The movable crocodile plate is assembled in the mounting hole and closes the mounting hole. The upper side of the movable crocodile plate is connected to the upper side of the mounting hole through a hinge, and the outer side of the lower part of the movable crocodile plate is hinged to the telescopic rod of the reciprocating telescopic hydraulic cylinder.

[0016] The suspended high-pressure water flushing and unblocking spraying device includes a small winch and a suspension sheave installed on the maintenance I-beam. The suspension wire rope wrapped around the small winch passes around the suspension sheave. The movable end of the suspension wire rope is connected to a protective cover. The protective cover is a diamond cone structure or a spherical structure. Several nozzles are provided on the protective cover. The suspension wire rope is connected side by side with a high-pressure water pipe. The lower end of the high-pressure water pipe extends into the protective cover and is connected to the water inlets of several nozzles.

[0017] The circulating cleaning device for large coal gangue includes an anti-falling grate, a vibrating screen plate, a gravity sensor, a suspended belt conveyor, a first scraper conveyor, a second scraper conveyor, a crusher and a chute device. The anti-falling grate is laid at the upper warehouse entrance, and the vibrating screen plate is tilted with a low front and a high back and is located directly above the anti-falling grate. The rear end of the upper warehouse belt lane is connected to the front end of the upper warehouse belt machine head chamber. The suspended belt conveyor, the first scraper conveyor, the second scraper conveyor, the crusher and the chute device are located in the upper warehouse belt lane. The suspended belt conveyor is connected to the upper warehouse belt conveyor. Several hanging steel ropes are installed between the top plates of the belt tunnel. The lower end of the front side of the vibrating screen plate is connected with the feed end of the first scraper conveyor. The gravity sensor is arranged at the feed end of the rear side of the first scraper conveyor. The first scraper conveyor and the second scraper conveyor are located below the suspended belt conveyor. The front discharge end of the first scraper conveyor is connected to the feed port of the crusher. The crusher discharge port is located above the rear end feed end of the second scraper conveyor. The front discharge end of the second scraper conveyor is connected to the suspended belt conveyor through a chute device.

[0018] By adopting the above technical solution, compared with the existing technology, the utility model has the following beneficial effects:

[0019] 1) It solves the problems of coal bunker blockage, arching, and wall sticking, reduces production interruptions caused by coal bunker blockage, avoids bunker blockage from becoming a "neck-choking" link in production, and ensures production continuity.

[0020] 2) It prevents workers from entering the coal bunker to perform cleaning operations, reduces production costs, reduces workers' labor intensity, ensures workers' safety, and improves work efficiency.

[0021] 3) The large gangue recycling cleaning device can cyclically crush large gangue, preventing blockage caused by large gangue in the coal blocks transported to the upper hopper by the suspended belt conveyor. Manual cleaning of the upper hopper is eliminated, reducing labor intensity, improving safety and reliability, and significantly improving efficiency. Crushing large gangue into small pieces also reduces the probability of blockage within the coal seam.

[0022] 4) The pre-buried hydraulic crocodile plate device and the air cannon device are conventional configurations of the current coal bunker. The utility model adjusts the setting position. The pre-buried hydraulic crocodile plate device is set on the left and right sides of the lower part of the hyperbolic closing funnel structure above the lower bunker opening, and the air cannon device is set on the left and right sides of the coal bunker maintenance platform and on the front and back sides of the hyperbolic closing funnel structure above the lower bunker opening, which has a better effect in clearing blockages. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the utility model;

[0024] Figure 2 yes Figure 1 Middle AA section view;

[0025] Figure 3 yes Figure 1 Enlarged view of middle part B;

[0026] Figure 4 yes Figure 3 Side view of the mid-suspension high-pressure water flushing and dredging spray device;

[0027] Figure 5 yes Figure 4 Top or bottom view of the middle protective cover

[0028] Figure 6 yes Figure 2 Middle CC section view;

[0029] Figure 7 yes Figure 2 Middle DD cross-sectional view. DETAILED DESCRIPTION

[0030] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples.

[0031] like Figure 1-Figure 7As shown, the utility model is a combined coal mine bunker clearing system, comprising a centrally suspended vibrating rod device, a pre-buried hydraulic crocodile plate device, a suspended high-pressure water flushing and dredging spray device, an air cannon device 1 and a circulating cleaning device for large coal gangue;

[0032] The centrally suspended vibrating rod device is arranged along the vertical centerline of the coal bunker 2. The upper end of the centrally suspended vibrating rod device is suspended and connected to the maintenance I-beam 6 above the upper bunker opening 5. The lower end of the centrally suspended vibrating rod device is connected to the upper end of the coal separator 8 provided at the center of the lower bunker opening 7.

[0033] The embedded hydraulic crocodile plate device is arranged on the left and right sides of the lower part of the hyperbolic closing funnel structure 9 above the lower compartment opening 7;

[0034] The suspended high-pressure water flushing and dredging spray device is arranged on the maintenance I-beam 6 of the upper warehouse belt conveyor head chamber 10 above the upper warehouse opening 5;

[0035] The air cannon device 1 is installed on the left and right sides of the coal bunker maintenance platform 3 and on the front and rear sides of the hyperbolic closing funnel structure 9 above the lower bunker opening 7;

[0036] The circulating cleaning device for large coal gangue is arranged at the upper storage port 5.

[0037] The centrally suspended vibrating rod device includes a vertically arranged steel pipe 11. The upper end of the steel pipe 11 is connected to the maintenance I-beam 6 via a flexible sling 12. The lower end of the steel pipe 11 is connected to the upper end of the coal distributor 8 via a flexible rope 13. Several vibrating rods are evenly arranged in the middle and lower parts of the steel pipe 11 along the height direction, and several linkage rods 14 are evenly arranged on the outer circle of the steel pipe 11. The power cord of the vibrating rod is inserted into the steel pipe 11 through the upper end of the steel pipe 11. When a blockage occurs inside the coal bin 2, the vibrating rod is started. The working principle of the vibrating rod is to use a high-speed rotating motor and a reducer to reduce the rotation speed of the motor and convert the rotational force into a reciprocating force and a rocking force to generate strong vibration. The vibrating rod transmits the vibration force to the steel pipe 11 through the rubber vibrating head, and then the several linkage rods 14 arranged on the steel pipe 11 disturb the blocked coal body, thereby clearing the blocked area.

[0038] The pre-buried hydraulic crocodile plate device includes a movable crocodile plate 15 and a reciprocating telescopic hydraulic cylinder 16. A mounting hole is provided on the lower side wall of the hyperbolic closing funnel structure 9. The movable crocodile plate 15 is assembled in the mounting hole and closes the mounting hole. The upper side of the movable crocodile plate 15 is connected to the upper side of the mounting hole by a hinge 17. The lower outer side of the movable crocodile plate 15 is hinged to the telescopic rod of the reciprocating telescopic hydraulic cylinder 16. The lower part of the hyperbolic closing funnel structure 9 at the bottom of the coal bunker 2 is prone to causing blockage of the coal bunker 2. This position is often the arch angle position where the blocking body forms an arch. When constructing the coal bunker 2, a movable crocodile plate 15 is pre-buried and arranged at this location. The outer side of the movable crocodile plate 15 is connected to the reciprocating telescopic hydraulic cylinder 16. When a blockage occurs at this location, the reciprocating telescopic hydraulic cylinder 16 is activated, and the movable crocodile plate 15 swings back and forth with the upper end hinge 17 as the fulcrum, causing mechanical disturbance to the blocking body and destroying the blocking body.

[0039] The suspended high-pressure water flushing and dredging spraying device includes a small winch 18 and a suspension sheave 19 installed on the maintenance I-beam 6. The suspension wire rope 20 wound on the small winch 18 passes around the suspension sheave 19. The movable end of the suspension wire rope 20 is connected to a protective cover 21. The protective cover 21 is a diamond cone structure or a spherical structure. The protective cover 21 is provided with a plurality of nozzles 22. The suspension wire rope 20 is connected in parallel with a high-pressure water pipe 37. The lower end of the high-pressure water pipe 37 extends into the protective cover 21 and is connected to the water inlet of the plurality of nozzles 22. When the coal bunker 2 needs to be cleaned, the small winch 18 drives the suspension wire rope 20 to drag the protective cover 21 vertically up and down along the coal bunker 2. When not in use, it is suspended on the maintenance I-beam 6 of the upper bunker belt machine head chamber 10. The protective cover 21 is a diamond-shaped cone structure or a spherical structure. Four nozzles 22 are distributed in a ring on the upper half of the protective cover 21, and four nozzles 22 are distributed in a ring on the lower half. When a blockage occurs or a thick layer of coal slime accumulates around it, the suspended high-pressure water flushing and dredging spray device can be connected to the suspended wire rope 20, and the traction force of the small winch 18 is used to pull the device from bottom to top to impact and hit the blockage body to loosen the blocked coal and gangue. At the same time, the high-pressure water supply system is activated to spray high-pressure water through the nozzles 22 to dredge the coal bunker 2. Under the safe premise that no one enters the bunker body, the blocked coal body is softened by high-pressure water flushing to destroy the stability of the blockage body. The water mist sprayed when the bunker is empty can clean the stubborn coal slime attachments adhered to the bunker wall, so that the bunker wall remains smooth and facilitates the smooth sliding of the loose coal under the action of gravity.

[0040] Generally, avoid using air cannon devices 1 to prevent air disturbances in the chamber, which could cause gas levels at the upper chamber to exceed the limit. If air cannon disturbance devices are required, appropriate measures should be taken to prevent gas levels at the upper chamber to exceed the limit.

[0041] The circulating cleaning device for large coal gangue includes an anti-falling grate 28, a vibrating screen plate 29, a gravity sensor 30, a suspension belt conveyor 31, a first scraper conveyor 32, a second scraper conveyor 33, a crusher 34 and a chute device 35. The anti-falling grate 28 is laid on the upper warehouse opening 5, and the vibrating screen plate 29 is tilted and arranged at the front of the anti-falling grate 28. The rear end of the upper warehouse belt lane 36 is connected to the front end of the upper warehouse belt machine head chamber 10. The suspension belt conveyor 31, the first scraper conveyor 32, the second scraper conveyor 33, the crusher 34 and the chute device 35 are arranged in the upper warehouse belt lane 36. Several hanging steel ropes 38 are provided between the suspension belt conveyor 31 and the top plate of the upper warehouse belt lane 36. The lower front end of the vibrating screen plate 29 is connected to the feed end of the first scraper conveyor 32, the gravity sensor 30 is arranged at the feed end of the rear side of the first scraper conveyor 32, the first scraper conveyor 32 and the second scraper conveyor 33 are located below the suspended belt conveyor 31, and a bracket 39 is provided at the bottom of the first scraper conveyor 32 and the second scraper conveyor 33. The front end discharge end of the first scraper conveyor 32 is connected to the feed port of the crusher 34, and the discharge port of the crusher 34 is located above the rear end feed end of the second scraper conveyor 33. One side of the discharge end on the front side of the second scraper conveyor 33 is connected to the suspended belt conveyor 31 through a chute device 35, and a baffle 40 is provided at the front end of the second scraper conveyor 33.

[0042] The upper opening 5 of the coal bunker 2 is the coal inlet. A flat-surfaced grate is typically used to screen out large lumps of coal gangue, preventing them from entering the bunker 2. Mines typically manually remove large lumps of coal gangue, which is labor-intensive, inefficient, and poses safety risks due to the high-altitude nature of the work. To reduce labor intensity and improve work efficiency and safety, the present invention designs a cyclical large-lump coal gangue cleaning device. The specific operating process of the cyclical large-lump coal gangue cleaning device is as follows:

[0043] On the grate, a vibrating screen plate 29 is arranged with a low front and a high back. The screen hole of the vibrating screen plate 29 is 400×400mm, and the screen hole size is larger than the size of the suspension equipment (protective cover 21, etc.). The inclination angle of the vibrating screen plate 29 is larger than the natural repose angle of large pieces of coal gangue, so that large pieces of coal gangue can move under the screen plate under normal circumstances. The coal transported by the suspended belt conveyor 31 falls onto the vibrating screen plate 29 from the rear end. The coal body and small pieces of coal gangue that pass through the vibrating screen plate 29 fall through the grate and fall into the coal bunker 2. Large pieces of coal gangue cannot pass through the vibrating screen plate 29 and slide down along the vibrating screen plate 29. It falls to the rear feeding end of the first scraper conveyor 32, and the gravity sensor 30 monitors the weight of the large pieces of coal gangue. When the accumulated weight reaches the set weight, the first scraper conveyor 32 starts and conveys the large pieces of coal gangue forward to the crusher 34. The crusher 34 crushes the large pieces of coal gangue and then conveys them forward by the second scraper conveyor 33. It is conveyed to the suspension belt through the chute device 35, and the suspension belt conveyor 31 then conveys the crushed small pieces of coal gangue together with the coal conveyed backward to the vibrating screen plate 29. The operation is circulated like this, and finally the large pieces of coal gangue are crushed into small pieces and conveyed to the coal bunker 2.

[0044] Most of the equipment and devices in the present invention are commonly used in coal mine production, so their specific structures and working principles are not described in detail.

[0045] The above embodiments illustrate the basic principles and features of the present invention. However, the above merely illustrates preferred embodiments of the present invention and is not intended to limit the present invention to the embodiments described. Persons skilled in the art, inspired by this patent, may make various modifications and improvements without departing from the spirit of the present invention and the scope of protection of the claims, all of which fall within the scope of protection of the present invention. Therefore, the patent and scope of protection of this utility model shall be subject to the appended claims.

Claims

1. A combined coal mine bunker clearing system, characterized by: It includes a centrally suspended vibrating rod device, a pre-buried hydraulic crocodile plate device, a suspended high-pressure water flushing and dredging spray device, an air cannon device, and a circulating large coal gangue cleaning device; The centrally suspended vibrating rod device is arranged along the vertical centerline of the coal bunker. The upper end of the centrally suspended vibrating rod device is hung and connected to the maintenance I-beam above the upper bunker opening, and the lower end of the centrally suspended vibrating rod device is connected to the upper end of the coal separator set at the center of the lower bunker opening. The embedded hydraulic crocodile plate device is arranged on the left and right sides of the lower part of the hyperbolic closing funnel structure above the lower compartment opening; The suspended high-pressure water flushing and dredging spray device is installed on the maintenance I-beam of the upper warehouse belt conveyor head chamber above the upper warehouse opening; The feeding end of the gravity-sensing coal feeder device is set just below the lower bin opening; Air cannon devices are installed on the left and right sides of the coal bunker maintenance platform and on the front and rear sides of the hyperbolic closing funnel structure above the lower bunker opening; The device for circulating and cleaning large pieces of coal gangue is installed at the upper storage port.

2. A combined coal mine bunker blockage clearing system according to claim 1, characterized in that: The central suspended vibrating rod device includes a vertically arranged steel pipe. The upper end of the steel pipe is connected to the maintenance I-beam through a flexible sling, and the lower end of the steel pipe is connected to the upper end of the coal distributor through a flexible rope. Several vibrating rods are evenly arranged in the middle and lower part of the steel pipe along the height direction, and several linkage rods are evenly arranged on the outer circle of the steel pipe.

3. The combined coal mine bunker blockage clearing system according to claim 1 is characterized by: The embedded hydraulic crocodile plate device includes a movable crocodile plate and a reciprocating telescopic hydraulic cylinder. A mounting hole is opened on the lower side wall of the hyperbolic closing funnel structure. The movable crocodile plate is assembled in the mounting hole and closes the mounting hole. The upper side of the movable crocodile plate is connected to the upper side of the mounting hole through a hinge, and the outer side of the lower part of the movable crocodile plate is hinged to the telescopic rod of the reciprocating telescopic hydraulic cylinder.

4. The combined coal mine bunker blockage clearing system according to claim 1, characterized in that: The suspended high-pressure water flushing and unblocking spraying device includes a small winch and a suspension sheave installed on the maintenance I-beam. The suspension wire rope wrapped around the small winch passes around the suspension sheave. The movable end of the suspension wire rope is connected to a protective cover. The protective cover is a diamond cone structure or a spherical structure. Several nozzles are provided on the protective cover. The suspension wire rope is connected side by side with a high-pressure water pipe. The lower end of the high-pressure water pipe extends into the protective cover and is connected to the water inlets of several nozzles.

5. The combined coal mine bunker blockage clearing system according to claim 1 is characterized by: The circulating cleaning device for large coal gangue includes an anti-falling grate, a vibrating screen plate, a gravity sensor, a suspended belt conveyor, a first scraper conveyor, a second scraper conveyor, a crusher and a chute device. The anti-falling grate is laid at the upper warehouse entrance, and the vibrating screen plate is tilted with a low front and a high back and is located directly above the anti-falling grate. The rear end of the upper warehouse belt lane is connected to the front end of the upper warehouse belt machine head chamber. The suspended belt conveyor, the first scraper conveyor, the second scraper conveyor, the crusher and the chute device are located in the upper warehouse belt lane. The suspended belt conveyor is connected to the upper warehouse belt conveyor. Several hanging steel ropes are installed between the top plates of the belt tunnel. The lower end of the front side of the vibrating screen plate is connected with the feed end of the first scraper conveyor. The gravity sensor is arranged at the feed end of the rear side of the first scraper conveyor. The first scraper conveyor and the second scraper conveyor are located below the suspended belt conveyor. The front discharge end of the first scraper conveyor is connected to the feed port of the crusher. The crusher discharge port is located above the rear end feed end of the second scraper conveyor. The front discharge end of the second scraper conveyor is connected to the suspended belt conveyor through a chute device.

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