Main shaft bottom coal spreading and cleaning system
The design of the Z-shaped conveyor chain and coal-gathering platform solved the problem of coal slag accumulation at the bottom of the mine, achieving efficient coal slag cleaning and lifting, and reducing equipment maintenance and manpower consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZAOZHUANG XINSHENG MECHANICAL & ELECTRICAL EQUIPMENT MANUFACTURING CO LTD
- Filing Date
- 2025-09-19
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, coal spilled at the bottom of the mine tends to accumulate during the hoisting process, leading to coal slag buildup at the bottom that cannot be effectively cleaned.
The conveyor chain and coal-gathering platform are arranged in a Z-shape. The coal slag is transported to the small bucket by a screw conveyor and is rotated and unloaded during the lifting process. Combined with support baffles and baffles, the coal slag is prevented from being pushed and piled up.
It has achieved efficient cleaning of coal slag at the bottom of the well, reduced the frequency of belt conveyor maintenance and manpower waste, and improved the efficiency of coal slag hoisting.
Smart Images
Figure CN224512651U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of coal spreading and cleaning technology, and relates to a coal spreading and cleaning system at the bottom of a main shaft. Background Technology
[0002] When vertical shaft hoisting is the primary hoisting method in a mine, skip hoisting of raw coal is generally used. During the loading, unloading, or hoisting of raw coal in the skip, some coal spills to the bottom of the shaft. Previously, skips mostly used old-style curved rail loading and unloading, resulting in a relatively large amount of spilled coal, approximately 3‰ to 5‰ of the mine's daily output. With advancements in technology, modern mines increasingly use pneumatic, hydraulic, or new curved rail loading and unloading methods, resulting in a smaller amount of spilled coal, approximately 1‰ to 2‰ of the mine's daily output. However, as the annual output of the mine increases, the daily amount of spilled coal is actually increasing. The spilled coal mixes with the water dripping from the shaft after loading and unloading, often forming a coal slurry that accumulates at the bottom of the shaft. Therefore, it is necessary to clean it up using appropriate methods to ensure the normal operation of the mine.
[0003] A Chinese invention patent with publication number CN105905554B describes a small bucket elevator mechanical coal cleaning system, comprising: a first belt conveyor, a water pump, a bucket elevator, and a second belt conveyor. The first belt conveyor is located in the connecting roadway between the bottom of the main shaft and the coal hoisting hole. The belt is inclined, with the lower end below the funnel at the bottom of the main shaft and the higher end at the coal receiving port of the coal hoisting hole. When the coal-water mixture is transported on the belt, the water flows downhill, while the scattered coal remains stationary relative to the belt, separating from the water. The separated water flows to the end of the connecting roadway and is pumped to the main roadway drainage system. The separated scattered coal falls into the coal hoisting hole. The bucket elevator... The bucket elevator is located inside the coal lifting hole. As the coal falls into the lifting hole, it enters the charging bucket of the bucket elevator and moves upward with it. When it reaches the top of the lifting hole, the charging bucket flips, dumping the coal onto the belt of the second belt conveyor. The second belt conveyor is located in the connecting roadway between the haulage roadway and the lifting hole. The second belt conveyor transports the coal to the haulage roadway, and the main roadway belt in the haulage roadway then transports the coal to the bottom of the main shaft. The bucket elevator includes a hoisting motor, a conveyor belt, and charging buckets. The conveyor belt is circular and driven by the hoisting motor. The charging buckets are evenly distributed on the outer side of the conveyor belt.
[0004] The existing technology has the following technical defects: While the above-mentioned technical solution can achieve the lifting and cleaning of coal spilled at the bottom of the well, the small bucket also pushes the coal piles that have fallen outwards as it continuously lifts the coal slag. Over time, this will cause more and more coal to accumulate at the bottom. However, if the coal slag is not located at the lifting position of the small bucket, it will be impossible to lift it. Utility Model Content
[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a coal spreading and cleaning system at the bottom of the main shaft.
[0006] The main shaft bottom coal spreading and cleaning system of this utility model includes a frame and a main shaft. The bottom of the main shaft is provided with a coal hopper, and a screw conveyor is connected to the bottom of the coal hopper. A drive motor is connected to the screw conveyor. A coal gathering platform is provided at the discharge port of the screw conveyor. The frame is set around the coal gathering platform. A Z-shaped conveying component adapted to the coal gathering platform is provided on the frame. The Z-shaped conveying assembly includes a drive mechanism, two parallel conveying chains, and several transmission teeth that are adapted to them to make the two conveying chains move synchronously. Several small buckets are evenly arranged between the two conveying chains.
[0007] The top of the small bucket is rotatably connected to a rotating rod, and the two ends of the rotating rod are respectively fixedly connected to two conveyor chains.
[0008] The conveyor chain is also fixedly connected to a support baffle corresponding to the small bucket.
[0009] The coal-gathering platform is equipped with a material-gathering plate on the side near the discharge port of the screw conveyor.
[0010] The coal-gathering platform is equipped with a baffle plate on its front side.
[0011] The coal-gathering platform is equipped with uprights.
[0012] Compared with the prior art, the beneficial effects of this utility model are: This utility model replaces belt conveyor with a Z-shaped conveyor chain, thereby reducing the need for frequent belt maintenance during conveying and reducing manpower waste. At the same time, the coal gathering platform avoids the problem of small buckets pushing and accumulating coal slag during loading and lifting. Attached Figure Description
[0013] Figure 1 This is one of the overall structural schematic diagrams of an embodiment of the present utility model. Figure 2 This is the second schematic diagram of the overall structure of an embodiment of this utility model. Figure 3 This is a perspective view of an embodiment of the present invention. Figure 4 This is a utility model Figure 3 Enlarged view of point A in the image. Figure 5 This is a schematic diagram of the coal-gathering platform in one embodiment of the present invention.
[0014] In the diagram: 1. Main shaft; 2. Coal hopper; 3. Drive motor; 4. Screw conveyor; 5. Coal gathering platform; 6. Small hopper; 7. Conveyor chain; 8. Rotating rod; 9. Support baffle; 10. Gathering plate; 11. Baffle plate; 12. Vertical plate; 13. Measuring hopper; 14. Transmission gear. Detailed Implementation
[0015] Example 1 like Figures 1-5 As shown, the main shaft 1 bottom coal spreading and cleaning system of this utility model includes a frame and a main shaft 1. The bottom of the main shaft 1 is provided with a coal hopper 2. The bottom of the coal hopper 2 is connected to a screw conveyor 4. A drive motor 3 is connected to the screw conveyor 4. A coal gathering platform 5 is provided at the discharge port of the screw conveyor 4. The frame is set around the coal gathering platform 5. A Z-shaped conveying component adapted to the coal gathering platform 5 is provided on the frame. The Z-shaped conveying assembly includes a drive mechanism and two parallel conveying chains 7 and several transmission teeth 14 adapted to them to make the two conveying chains 7 move synchronously. Several small buckets 6 are evenly arranged between the two conveying chains 7. A metering bucket 13 for unloading small buckets 6 is provided at the top of the frame. When the drive mechanism drives the two conveying chains 7 to move synchronously, the small buckets 6 move accordingly. When the small buckets 6 pass the coal gathering platform 5, the coal slag enters the small buckets 6 as they move. Then, the small buckets 6 are reversed and conveyed by the transmission teeth 14 at the front end. When the small buckets 6 are lifted to the top of the frame, they rotate during the reversal. The coal slag in the small buckets 6 falls into the metering bucket 13 under its own gravity, thereby realizing coal extraction from the bottom of the well.
[0016] The top of the small bucket 6 is rotatably connected to a rotating rod 8, and the two ends of the rotating rod 8 are respectively fixedly connected to two conveyor chains 7.
[0017] The conveying chain 7 is also fixedly connected with a support baffle 9 corresponding to the small bucket 6. Since the small bucket 6 is rotating, during the conveying process, the rotation of the small bucket 6 may affect the movement of the small bucket 6 in both directions, thus affecting the overall smooth operation. Therefore, the support baffle 9 is used to lift the small bucket 6 during transverse conveying to prevent the small bucket 6 from rotating to the underside of the conveying chain 7, thereby affecting the conveying of the small bucket 6 in the other direction.
[0018] The coal-gathering platform 5 is equipped with a material-gathering plate 10 on the side near the discharge port of the screw conveyor 4. When coal slag falls through the outlet of the screw conveyor 4, it slides down through the material-gathering plate 10 and accumulates on the coal-gathering platform 5, waiting to be filled by the small bucket 6.
[0019] The coal-gathering platform 5 is equipped with a baffle plate 11 on its front side. When the small bucket 6 is loading material during its forward movement, it will inevitably push the coal slag forward. Over time, it will push more and more coal slag, thus affecting the lifting of the coal slag. The baffle plate 11 allows the small bucket 6 to continue sliding down to the coal-gathering platform 5 after it has finished loading material, waiting for the next lifting.
[0020] The coal-gathering platform has five rows of upright plates 12 to prevent coal slag from falling off the edges.
[0021] Working process or working principle: During operation, when the drive mechanism drives the two conveyor chains 7 to move synchronously, the small bucket 6 moves accordingly. When the small bucket 6 passes the coal gathering platform 5, the coal slag enters the small bucket 6 as it moves. Then, the small bucket 6 is reversed and conveyed through the transmission gear 14 at the front end. During the conveying process, the rotation of the small bucket 6 may affect the movement of the two conveying buckets in different directions, causing motion interference. The support baffle 9 is used to lift the small bucket 6 during transverse conveying to prevent it from rotating to the underside of the conveyor chain 7, thus affecting the conveying of the small bucket 6 in the other direction. When the small bucket 6 is lifted to the top of the frame, it rotates during the reversal. The coal slag in the small bucket 6 falls into the metering bucket 13 under its own gravity, thereby realizing the extraction of coal from the bottom of the well and recording the amount of coal scattered at the bottom of the well.
[0022] This utility model replaces belt conveyor with a Z-shaped conveyor chain 7, thereby reducing the need for frequent belt maintenance during the conveying process and reducing manpower waste. At the same time, the coal gathering platform 5 avoids the problem of small buckets 6 pushing coal slag to move and accumulate during loading and lifting.
[0023] The descriptions of the orientation and relative positional relationships of the structure in this utility model, such as descriptions of front, back, left, right, up, and down, do not constitute a limitation on this utility model, but are merely for the convenience of description.
Claims
1. A main shaft bottom coal-distributing cleaning system comprising a main shaft (1) and a rack, characterized in that: The main shaft (1) is provided with a coal hopper (2) at the bottom, and a screw conveyor (4) is connected to the bottom of the coal hopper (2). A drive motor (3) is connected to the screw conveyor (4). A coal-gathering platform (5) is provided at the outlet of the screw conveyor (4). The frame is set around the coal-gathering platform (5). A Z-shaped conveying component adapted to the coal-gathering platform (5) is provided on the frame. The Z-shaped conveying assembly includes a drive mechanism and two parallel conveying chains (7) and several transmission teeth (14) adapted to them to make the two conveying chains (7) move synchronously. Several small buckets (6) are evenly arranged between the two conveying chains (7).
2. A main shaft well bottom coal spreading cleaning system according to claim 1, characterized in that: The top of the small bucket (6) is rotatably connected to a rotating rod (8), and the two ends of the rotating rod (8) are fixedly connected to two conveyor chains (7).
3. A main shaft well bottom coal spreading cleaning system according to claim 2, characterized in that: The conveyor chain (7) is also fixedly connected to a support baffle (9) corresponding to the small bucket (6).
4. A main shaft well bottom coal spreading cleaning system according to claim 3, characterized in that: The coal-gathering platform (5) is equipped with a material-gathering plate (10) on the side near the discharge port of the screw conveyor (4).
5. A main shaft well bottom coal spreading cleaning system according to claim 4, characterized in that: The coal-gathering platform (5) is equipped with a baffle plate (11) on the front side.
6. A main shaft well bottom coal spreading cleaning system according to claim 5, characterized in that: The coal-gathering platform (5) is equipped with a vertical plate (12).