Underground coal mine raw coal grading and grading system

Abstract

The utility model discloses an underground coal mine raw coal grading and grading system which comprises a raw coal crushing system, the lower portion of the raw coal crushing system is communicated with a particle size grading system through a raw coal discharging chute, the particle size grading system is communicated with a coal gangue sorting system, and the particle size grading system and the coal gangue sorting system are jointly communicated with a raw material storage system. And a discharging system is communicated below the raw material storage system. According to the underground coal mine raw coal grading and grading system, the raw coal crushing system, the particle size grading system, the coal and gangue sorting system, the raw material storage system and the discharging system can complete grading and grading of raw coal in the bin, underground space is saved, the grading and grading process is optimized, and the coal and gangue sorting efficiency is improved. And meanwhile, the grading and quality-grading precision of the underground raw coal is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of raw coal sorting and storage in underground coal mines, and relates to a raw coal grading and quality classification system in underground coal mines. Background Art

[0002] The underground classification and quality separation of raw coal in coal mines refers to the separation of coal and gangue underground. The separated coal generally enters the underground coal bunker and then is lifted to the surface; the separated gangue generally enters the underground gangue bunker and then is used for underground gangue filling or other ways.

[0003] In the prior art, the classification and separation of coal and gangue are usually achieved by building a coal gangue sorting chamber, an independent gangue bin and an independent coal bin in the coal mine. However, in the above raw coal classification and separation technology, the coal bin, the sorting chamber and the gangue bin are arranged independently and horizontally, and can only separate coal and gangue, and the fine coal is still mixed with the lump coal; at the same time, the chamber required by the prior art has a large cross-section and high safety risk; the classification and separation process is complex and prone to failure; there are many classification and separation equipment, and the maintenance and repair intensity is high. Utility Model Content

[0004] The utility model aims to provide a raw coal grading and quality classification system in a coal mine, which completes the grading and quality classification of raw coal by arranging raw coal crushing, screening, sorting, storage and discharge systems in a warehouse.

[0005] The technical solution adopted by the utility model is that the raw coal grading and quality classification system in the coal mine includes a raw coal crushing system, the raw coal crushing system is connected to a particle size grading system through a raw coal unloading chute, the particle size grading system is connected to a gangue sorting system, the particle size grading system and the gangue sorting system are connected to a raw material storage system, and the raw material storage system is connected to a discharge system below.

[0006] The utility model is also characterized in that:

[0007] The raw coal crushing system includes a double-toothed roller crusher and a raw coal belt conveyor which are interconnected. The double-toothed roller crusher is connected to the particle size classification system through a raw coal unloading chute.

[0008] The particle size classification system includes a grading screen. The double-toothed roller crusher is connected to the grading screen through a raw coal unloading chute. The grading screen is connected to a lump coal unloading chute and a fine coal unloading chute respectively. The lump coal unloading chute is connected to a coal gangue sorting system, and the fine coal unloading chute is connected to a raw material storage system.

[0009] The raw material storage system includes a lump coal bin, a lump gangue bin and a final coal bin. The lump coal bin, the lump gangue bin and the final coal bin are all arranged vertically. The lump coal bin and the lump gangue bin are respectively connected to the coal gangue sorting system, the final coal bin is connected to the final coal unloading chute, the lump coal bin is provided with a lump coal unloading gate, the lump coal bin is connected to the discharge system, the lump gangue bin is provided with a lump gangue unloading gate, and the final coal bin is provided with a final coal unloading gate.

[0010] The discharge system includes a loading chamber, in which a belt conveyor is arranged, and the lump coal bunker is connected to the loading chamber.

[0011] The beneficial effects of the utility model are:

[0012] The utility model of the underground raw coal classification and quality classification system of the coal mine enables the raw coal crushing system, the particle size classification system, the coal gangue sorting system, the raw material storage system and the discharge system to complete the classification and quality classification of the raw coal in the warehouse, saving the underground space, optimizing the classification and quality classification process, reducing the maintenance of the system equipment, and improving the efficiency of coal gangue sorting. At the same time, the layout of the coal bunker, the gangue bunker and the final coal bunker is optimized, and the traditional horizontally arranged coal bunker, the gangue bunker and the final coal bunker are arranged vertically, so that the final coal is stored independently, and the discharge of the block gangue, the block coal and the final coal is independent and does not affect each other, thereby improving the accuracy of the underground raw coal classification and quality classification. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model underground raw coal classification and quality classification system of a coal mine;

[0014] Figure 2 It is a structural schematic diagram of the raw coal crushing system of the utility model;

[0015] Figure 3 It is a structural schematic diagram of the particle size classification system and coal gangue separation system of the utility model;

[0016] Figure 4 It is a structural schematic diagram of the raw material storage system of the utility model;

[0017] Figure 5 It is a structural schematic diagram of the discharge system of the utility model.

[0018] In the figure, 1. raw coal crushing system, 2. particle size classification system, 3. coal gangue sorting system, 4. raw material storage system, 5. discharge system, 6. double-toothed roller crusher, 7. raw coal unloading chute, 8. grading screen, 9. lump coal unloading chute, 10. fine coal unloading chute, 11. lump coal bin, 12. lump gangue bin, 13. fine coal bin, 14. lump coal unloading gate, 15. lump gangue unloading gate, 16. fine coal unloading gate, 17. raw coal belt conveyor, 18. loading chamber, 19. belt conveyor. DETAILED DESCRIPTION

[0019] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0020] The utility model provides a raw coal classification and quality classification system in a coal mine, such as Figure 1As shown, it includes a raw coal crushing system 1, a particle size classification system 2, a coal gangue sorting system 3, a raw material storage system 4 and a discharge system 5; Figure 2 As shown, the raw coal crushing system 1 includes a double-toothed roller crusher 6 and a raw coal belt conveyor 17 which are connected to each other. The double-toothed roller crusher 6 is connected to the particle size classification system 2 through a raw coal unloading chute 7; Figure 3 As shown, the particle size classification system 2 includes a classification screen 8, a double-toothed roller crusher 6 is connected to the classification screen 8 through a raw coal discharge chute 7, the classification screen 8 is respectively connected to a lump coal discharge chute 9 and a fine coal discharge chute 10, the lump coal discharge chute 9 is connected to the coal gangue sorting system 3, and the fine coal discharge chute 10 is connected to the raw material storage system 4; Figure 4 As shown, the raw material storage system 4 includes a lump coal bin 11, a lump gangue bin 12 and a final coal bin 13. The lump coal bin 11, the lump gangue bin 12 and the final coal bin 13 are all arranged vertically. The lump coal bin 11 and the lump gangue bin 12 are respectively connected to the coal gangue sorting system 3, the final coal bin 13 is connected to the final coal unloading chute 10, the lump coal bin 11 is provided with a lump coal unloading gate 14, the lump coal bin 11 is connected to the discharge system 5, the lump gangue bin 12 is provided with a lump gangue unloading gate 15, and the final coal bin 13 is provided with a final coal unloading gate 16; Figure 5 As shown, the discharge system 5 includes a vertically arranged loading chamber 18 , in which a belt conveyor 19 is provided, and the lump coal bunker 11 is in communication with the loading chamber 18 .

[0021] Among them, the crusher in the raw coal crushing system 1 is a double-toothed roller crusher 6; the coal gangue sorting system 3 sorts the coal and gangue by photoelectric identification, and high-pressure gas hits the gangue into the gangue bin 12; the coal and gangue unloading gate 14, the gangue unloading gate 15 and the final coal unloading gate 16 are independent of each other and can be opened and closed individually or in combination; the raw coal crushing system 1, the particle size classification system 2, the coal gangue sorting system 3, the raw material storage system 4 and the discharge system 5 are all located in the bin.

[0022] Working principle of the utility model underground raw coal classification and quality classification system in coal mines:

[0023] Step 1: The raw coal is transported to the double-toothed roller crusher 6 in the main transport lane through the raw coal belt conveyor 17 in the raw coal crushing system 1 of the raw coal grading and quality classification bin;

[0024] Step 2: In the double-toothed roller crusher 6, the large pieces of raw coal are crushed to less than 300 mm and then enter the particle size classification system 2 through the raw coal discharge chute 7;

[0025] Step 3: In the particle size classification system 2, the raw coal passes through the classification screen 8, and the fine coal below 50 mm falls into the fine coal bin 13 through the fine coal unloading chute 10, and the raw coal above 50 mm enters the coal gangue sorting system 3 through the lump coal unloading chute 9;

[0026] Step 4: In the coal gangue sorting system 3, the lump coal and lump gangue are identified by photoelectricity, and the lump gangue is struck into the lump gangue bin 12 by high-pressure gas, and the lump coal falls into the lump coal bin 11;

[0027] Step 5: When lump coal is needed, the lump coal unloading gate 14 is opened, and the lump coal falls onto the belt conveyor 19 in the loading chamber 18 and is transported to the designated location.

[0028] Example 1

[0029] This embodiment provides a system for grading and classifying raw coal in underground coal mines, such as Figure 1 As shown, it includes a raw coal crushing system 1, the raw coal crushing system 1 is connected to a particle size grading system 2 through a raw coal unloading chute 7, the particle size grading system 2 is connected to a coal gangue sorting system 3, the particle size grading system 2 and the coal gangue sorting system 3 are connected to a raw material storage system 4, and the raw material storage system 4 is connected to a discharge system 5 below.

[0030] Example 2

[0031] This embodiment provides a system for grading and classifying raw coal in underground coal mines, such as Figure 1-3 As shown, it includes a raw coal crushing system 1, and the raw coal crushing system 1 is connected to a particle size grading system 2 through a raw coal unloading chute 7 below, and the particle size grading system 2 is connected to a gangue sorting system 3, and the particle size grading system 2 and the gangue sorting system 3 are commonly connected to a raw material storage system 4, and the raw material storage system 4 is connected to a discharge system 5 below, the raw coal crushing system 1 includes a double-toothed roller crusher 6 and a raw coal belt conveyor 17 that are interconnected, the double-toothed roller crusher 6 is connected to the particle size grading system 2 through the raw coal unloading chute 7, the particle size grading system 2 includes a grading screen 8, the double-toothed roller crusher 6 is connected to the grading screen 8 through the raw coal unloading chute 7, the grading screen 8 is respectively connected to a lump coal unloading chute 9 and a fine coal unloading chute 10, the lump coal unloading chute 9 is connected to the gangue sorting system 3, and the fine coal unloading chute 10 is connected to the raw material storage system 4.

[0032] Example 3

[0033] This embodiment provides a system for grading and classifying raw coal in underground coal mines, such as Figure 1-5As shown, it includes a raw coal crushing system 1, the raw coal crushing system 1 is connected to a particle size classification system 2 through a raw coal unloading chute 7, the particle size classification system 2 is connected to a gangue sorting system 3, the particle size classification system 2 and the gangue sorting system 3 are connected to a raw material storage system 4, and the raw material storage system 4 is connected to a discharge system 5 below, the raw coal crushing system 1 includes a double-toothed roller crusher 6 and a raw coal belt conveyor 17 that are connected to each other, the double-toothed roller crusher 6 is connected to the particle size classification system 2 through the raw coal unloading chute 7, the particle size classification system 2 includes a grading screen 8, the double-toothed roller crusher 6 is connected to the grading screen 8 through the raw coal unloading chute 7, the grading screen 8 is respectively connected to a lump coal unloading chute 9 and a fine coal unloading chute 10, the lump coal unloading chute 9 is connected to the gangue sorting system 3, and the final coal unloading chute 10 is connected to the raw material storage system 4. The raw material storage system 4 includes a lump coal bin 11, a lump gangue bin 12 and a final coal bin 13. The lump coal bin 11, the lump gangue bin 12 and the final coal bin 13 are all vertically arranged. The lump coal bin 11 and the lump gangue bin 12 are respectively connected to the gangue sorting system 3. The final coal bin 13 is connected to the final coal unloading chute 10. The lump coal bin 11 is provided with a lump coal unloading gate 14. The lump coal bin 11 is connected to the discharge system 5. The lump gangue bin 12 is provided with a lump gangue unloading gate 15. The final coal bin 13 is provided with a final coal unloading gate 16. The discharge system 5 includes a vertically arranged loading chamber 18. A belt conveyor 19 is provided in the loading chamber 18. The lump coal bin 11 is connected to the loading chamber 18.

[0034] By using the underground raw coal grading and quality classification system of the utility model, underground space can be saved, the grading and quality classification process is optimized, and the accuracy of underground raw coal grading and quality classification is improved.

Claims

1. The underground raw coal classification and quality classification system of coal mines is characterized by: The invention comprises a raw coal crushing system (1), wherein the raw coal crushing system (1) is connected to a particle size classification system (2) through a raw coal unloading chute (7) below the raw coal crushing system (1), the particle size classification system (2) is connected to a gangue sorting system (3), the particle size classification system (2) and the gangue sorting system (3) are connected to a raw material storage system (4), and the raw material storage system (4) is connected to a discharge system (5) below the raw coal crushing system (1); the raw coal crushing system (1) comprises a double-toothed roller crusher (6) and a raw coal belt conveyor (7) which are connected to each other. 17), the double-toothed roller crusher (6) is connected to the particle size classification system (2) through the raw coal discharge chute (7); the particle size classification system (2) includes a classification screen (8), the double-toothed roller crusher (6) is connected to the classification screen (8) through the raw coal discharge chute (7), the classification screen (8) is respectively connected to a lump coal discharge chute (9) and a fine coal discharge chute (10), the lump coal discharge chute (9) is connected to the coal gangue sorting system (3), and the fine coal discharge chute (10) is connected to the raw material storage system (4).

2. The underground raw coal classification and quality classification system of coal mine according to claim 1 is characterized in that: The raw material storage system (4) comprises a lump coal bin (11), a lump gangue bin (12) and a final coal bin (13); the lump coal bin (11), the lump gangue bin (12) and the final coal bin (13) are all arranged vertically; the lump coal bin (11) and the lump gangue bin (12) are respectively connected to a coal gangue sorting system (3); the final coal bin (13) is connected to a final coal unloading chute (10); the lump coal bin (11) is provided with a lump coal unloading gate (14); the lump coal bin (11) is connected to a discharge system (5); the lump gangue bin (12) is provided with a lump gangue unloading gate (15); and the final coal bin (13) is provided with a final coal unloading gate (16).

3. The underground raw coal classification and quality classification system of coal mine according to claim 2 is characterized in that: The discharge system (5) comprises a vertically arranged loading chamber (18), a belt conveyor (19) is arranged in the loading chamber (18), and the lump coal bin (11) is in communication with the loading chamber (18).

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