Coal mine collecting device in coal mining

Abstract

The invention discloses a coal mine collecting device in coal mining, and relates to the technical field of coal mine collection, the coal mine collecting device comprises a crushing unit horizontally and stably arranged on the ground, feeding units symmetrically and correspondingly arranged on two sides of the crushing unit, and three groups of feeding units are equidistantly distributed on two sides; the feeding units are symmetrically distributed on the two sides of the crushing unit, the material receiving range is widened, material accumulation on a mining site is avoided, the lifting units are matched with the feeding units in multi-group layout, the materials are rapidly received and conveyed to the crushing unit, the crushing unit can receive the materials of the lifting units on the two sides at the same time, and the treatment efficiency is improved; the screening unit screens the crushed materials, and a circular treatment mechanism is formed through the conveying unit, so that all the materials are ensured to reach qualified particle sizes, unqualified materials are prevented from being stacked, the situation that the quality and value of the materials are reduced due to environmental influence caused by long-time stacking is prevented, and the overall benefit and safety of coal mining operation are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of coal collection technology, specifically to a coal collection device used in coal mining. Background Technology

[0002] Coal mines refer to places rich in coal resources, generally divided into underground coal mines and open-pit coal mines. When the coal seam is far from the surface, underground tunnels are typically dug to extract the coal; this is called an underground coal mine. When the coal seam is very close to the surface, the surface soil layer is typically stripped away to extract the coal; this is called an open-pit coal mine. Coal is the most important solid fuel, a type of combustible organic rock. Based on the degree of coalification, it can be divided into four categories: peat, lignite, bituminous coal, and anthracite. In the coal mining industry, efficient coal collection and processing are crucial for ensuring smooth mining operations and improving overall economic efficiency. With the continuous advancement of coal mining technology and the significant increase in market demand, large-scale, high-intensity coal mining has become the mainstream trend in the industry.

[0003] Existing coal mine collection devices often fail to adequately consider the high output rate of coal during large-scale mining. Due to limitations in their processing capacity, they cannot keep up with such rapid material production, resulting in a large amount of mined coal not being received and processed in a timely manner. This coal accumulates at the mining site, occupying valuable mining space, affecting the normal movement and operation of subsequent mining equipment, increasing the difficulty of site management and safety risks. Furthermore, prolonged accumulation can expose the coal to external environmental factors, thereby reducing its quality and value. Therefore, this invention proposes a coal collection device for coal mining. Summary of the Invention

[0004] The purpose of this invention is to provide a coal collection device for coal mining, addressing the problem that existing coal collection devices, as mentioned in the background art, often fail to adequately consider the high output rate of coal materials during large-scale mining. Due to limitations in their processing capacity, they cannot keep up with such rapid material output, resulting in a large amount of mined coal materials not being received and processed in a timely manner and accumulating at the mining site. This accumulation not only occupies valuable mining space, affecting the normal movement and operation of subsequent mining equipment and increasing the management difficulty and safety risks at the mining site, but also, prolonged accumulation may lead to the coal materials being affected by external environmental factors, thereby reducing the quality and value of the coal.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A coal collection device for coal mining, comprising:

[0007] The crushing unit is horizontally and stably set on the ground. It is used to crush coal materials, so that large pieces of coal are crushed into suitable particle sizes.

[0008] The feeding units are symmetrically arranged on both sides of the crushing unit. There are three sets of feeding units on both sides at equal distances, which are used to receive coal and mineral materials from the coal mining site.

[0009] There are six sets of lifting units corresponding to the feeding units, and they are set on the side of the feeding units close to the crushing units. The lifting units are used to receive the coal and mineral materials conveyed by the feeding units and convey them to the crushing units.

[0010] A screening unit is located at the bottom of the crushing unit and is used to receive the coal and mineral materials crushed by the crushing unit and to screen and separate them. On the side of the screening unit, there is a recycling conveying unit for transporting larger pieces of coal and mineral materials that do not meet the particle size requirements screened out by the screening unit back to the feeding unit, and a collection conveying unit for transporting coal and mineral materials that meet the particle size requirements screened out by the screening unit to an external collection box. Both the recycling conveying unit and the collection conveying unit are connected to the screening unit.

[0011] Optionally, the feeding unit includes a feeding bin mounted on a base frame. The bottom of the feeding bin is provided with an inclined slot. A first conveyor belt is provided on the inner side of the base frame, below the inclined slot. Several support members are distributed along the belt body direction in the inner cavity of the first conveyor belt. A connecting frame is provided on the side of the base frame corresponding to the output port of the first conveyor belt. A discharge chute is installed on the connecting frame.

[0012] Optionally, the support includes a frame rod horizontally mounted on the side frame of the base frame, with uprights evenly spaced along the rod body direction, and support rollers rotatably connected between adjacent uprights.

[0013] Optionally, the lifting unit includes a lifting shell disposed next to the feed hopper. The bottom side of the lifting shell is provided with a lifting feed inlet that cooperates with the discharge chute, and the top side of the lifting shell is provided with a lifting discharge outlet. The upper and lower ends of the lifting shell are respectively provided with a driving member and a tensioning member that work together to act on the traction bar. The traction bar is wound around the shaft ends of the driving member and the tensioning member. A hopper for lifting coal and mineral materials from the lifting feed inlet to the lifting discharge outlet is fixed on the traction bar.

[0014] Optionally, the crushing unit includes a crushing box located between two lifting units. The top of the crushing box has a crushing inlet corresponding to the two lifting outlets. A crushing shaft is rotatably connected inside the crushing box, and the shaft body of the crushing shaft is provided with crushing and stirring blades. The bottom of the crushing box has a crushing outlet.

[0015] Optionally, the screening unit includes a support frame, with a first spring at each of the four top corners of the support frame. The top of the first springs is connected to an inclined fixing frame. A sieve plate is installed inside the fixing frame, and baffles are provided on the top of both sides of the fixing frame. A guide groove is provided at the bottom of the fixing frame corresponding to the lower part of the sieve plate, and a vibrating element is fixedly installed on the outside of the guide groove.

[0016] Optionally, the bottom of the two side supports of the support frame is fixedly connected to the side plates by connecting rods. The upper end face of the two side plates is provided with a fixed plate. Each side plate is provided with a movable box. A rotating body is rotatably installed in the movable box. A spiral groove is opened on the outer surface of the rotating body. Movable blocks are symmetrically installed in the spiral groove about the axis of the rotating body. A U-shaped frame is fixedly connected to the two movable blocks on opposite sides. A movable rod is fixedly connected to the side end face of the U-shaped frame. A drive box with a drive source is provided on the side of the movable box. The drive source in the drive box drives the rotating body in the movable box to rotate through a connecting shaft.

[0017] Optionally, the screening unit further includes a chute, which is formed on the upper surface of one side of the side plate. An extension rod is fixedly connected to each side of the fixed frame. An auxiliary slider that slides in the chute is provided at the bottom of the extension rod. The auxiliary slider is fixedly connected to the movable rod on the side facing the movable box.

[0018] Optionally, a plurality of second springs are distributed along the plate body direction on the end face of the fixing plate facing the fixing frame, and the other ends of the plurality of second springs are fixedly connected to the frame body of the fixing frame.

[0019] Optionally, the recycling conveying unit includes a second conveyor belt, which is bidirectional and is disposed on the lower side of the fixed frame; the collection conveying unit includes a third conveyor belt, which is disposed below the guide trough.

[0020] The beneficial effects of this invention are:

[0021] This invention utilizes symmetrically arranged, multiple feeding units distributed on both sides of the crushing unit to broaden the material receiving range. This enables rapid material collection from multiple directions, preventing material accumulation at the mining site, providing ample space for equipment operation, and reducing management difficulty and safety risks. Multiple lifting units are arranged to match the feeding units, quickly receiving and transporting materials to the crushing unit, solving the conveying bottleneck of vertical lifting, accelerating transmission speed, and preventing material accumulation. The crushing unit can simultaneously receive materials from both lifting units, improving processing efficiency. A screening unit filters the crushed material, a recycling conveyor returns unqualified materials to the feeding unit for recycling, and a collection conveyor sends qualified materials to an external collection box, forming a circular processing mechanism. This ensures all materials reach the qualified particle size, preventing the accumulation of unqualified materials and preventing the material from deteriorating in quality and value due to long-term accumulation and environmental impact. This comprehensive approach guarantees efficient and safe operation of the coal mining collection process, significantly improving the overall efficiency and safety of coal mining operations. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0023] Figure 1 This is a schematic diagram of the overall structure of a coal collection device in coal mining according to the present invention.

[0024] Figure 2 This is a front view of the present invention;

[0025] Figure 3 This is a schematic diagram of the feeding unit and the lifting unit in this invention;

[0026] Figure 4 This is a schematic diagram of the support structure in this invention;

[0027] Figure 5 This is a cross-sectional view of the feeding unit and the lifting unit in this invention;

[0028] Figure 6 This is a cross-sectional view of the crushing unit in this invention;

[0029] Figure 7 This is a schematic diagram of the coal mine conveying route after screening by the screening unit in this invention;

[0030] Figure 8 This is a schematic diagram of the screening unit in this invention;

[0031] Figure 9 This is a schematic diagram of the screening unit from another perspective in this invention;

[0032] Figure 10 for Figure 9 A magnified view of a section at point A in the middle;

[0033] Figure 11 for Figure 9 A magnified view of a section at point B.

[0034] The numbers on the map are:

[0035] 1. Feeding unit; 101. Feeding bin; 102. Base frame; 103. Inclined chute; 104. First conveyor belt; 105. Support components; 1051. Frame rod; 1052. Upright pole; 1053. Support roller; 106. Connecting frame; 107. Discharge chute;

[0036] 2. Lifting unit; 201. Lifting shell; 202. Lifting inlet; 203. Lifting outlet; 204. Drive component; 205. Tensioning component; 206. Traction bar; 207. Hopper;

[0037] 3. Crushing unit; 301. Crushing box; 302. Crushing feed inlet; 303. Crushing shaft; 304. Crushing mixing blades; 305. Crushing discharge outlet;

[0038] 4. Screening unit; 401. Support frame; 402. First spring; 403. Fixing frame; 404. Screen plate; 405. Guide channel; 406. Vibrating component; 407. Baffle; 408. Connecting rod; 409. Side plate; 410. Fixing plate; 411. Movable box; 412. Rotating body; 413. Spiral groove; 414. Movable block; 415. U-shaped frame; 416. Movable rod; 417. Drive box; 418. Slide groove; 419. Extension rod; 420. Auxiliary slider; 421. Second spring;

[0039] 5. Recycling conveyor unit; 501. Second conveyor belt;

[0040] 6. Collection and conveying unit; 601. Third conveyor belt. Detailed Implementation

[0041] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0042] As attached Figure 1 To be continued Figure 11 As shown, the present invention provides a coal collection device for coal mining, including a crushing unit 3, which is horizontally and stably set on the ground. It is used to crush coal materials, so that large pieces of coal are crushed into suitable particle sizes. The crushing unit 3 can simultaneously receive materials from the lifting units 2 on both sides, thereby improving the material processing efficiency.

[0043] Feeding unit 1 is symmetrically arranged on both sides of crushing unit 3. There are three sets of feeding units 1 on both sides at equal distances. They are used to receive coal and mineral materials from the coal mine. Compared with the traditional single or few feeding ports, the layout greatly expands the receiving range of coal and mineral materials. It can receive materials produced from the coal mine from multiple directions at the same time, avoiding the accumulation of materials at the mining site due to insufficient receiving ports. It leaves enough space for the normal movement and operation of subsequent equipment, and reduces the management difficulty and safety risks at the mining site.

[0044] The lifting unit 2 consists of six sets corresponding to the feeding unit 1, and is located on the side of the feeding unit 1 close to the crushing unit 3. The lifting unit 2 is used to receive the coal and mineral materials conveyed by the feeding unit 1 and transport them to the crushing unit 3. The layout of the multiple lifting units 2 matches the feeding unit 1, which can quickly and efficiently receive the coal and mineral materials conveyed by the feeding unit 1 and transport them to the crushing unit 3. This effectively solves the bottleneck problem of material conveying during vertical lifting, speeds up the material transmission speed, and ensures that the material will not accumulate due to the low efficiency of the lifting process.

[0045] Screening unit 4, located at the bottom of crushing unit 3, is used to receive and screen the coal and mineral materials after crushing by crushing unit 3. Next to screening unit 4 are recycling conveying unit 5, which transports larger pieces of coal and mineral materials that are not of the acceptable particle size back to feeding unit 1, and collection conveying unit 6, which transports the acceptable particle size coal and mineral materials to an external collection box. Both recycling conveying unit 5 and collection conveying unit 6 are connected to screening unit 4. This cyclical processing mechanism ensures that all materials reach the acceptable particle size, avoids the accumulation of unacceptable materials, and prevents the reduction in quality and value due to long-term accumulation and environmental influences.

[0046] like Figure 3-6 As shown, in one embodiment of the present invention, the feeding unit 1 includes a feeding bin 101 disposed on a base frame 102. The bottom of the feeding bin 101 is provided with a sloping slot 103. A first conveyor belt 104 is disposed on the inner side of the base frame 102 and below the sloping slot 103. A plurality of support members 105 are distributed in the inner cavity of the first conveyor belt 104 along the belt body direction. A connecting frame 106 is provided on the side of the base frame 102 corresponding to the output port of the first conveyor belt 104. A discharge chute 107 is installed on the connecting frame 106.

[0047] In one embodiment of the present invention, the support member 105 includes a frame rod 1051 horizontally arranged on the side frame of the base frame 102. The frame rod 1051 is provided with uprights 1052 at equal intervals along the rod body direction. A support roller 1053 is rotatably connected between adjacent uprights 1052. The support member 105 not only provides stable support for the first conveyor belt 104, reducing sagging and deformation during the conveying process, but also the rotation characteristics of the support roller 1053 effectively reduce the friction between the conveyor belt and the support member 105, extending the service life of the conveyor belt.

[0048] In one embodiment of the present invention, the lifting unit 2 includes a lifting shell 201 disposed beside the feeding bin 101. The bottom side of the lifting shell 201 is provided with a lifting feed inlet 202 that cooperates with the discharge trough 107, and the top side of the lifting shell 201 is provided with a lifting discharge outlet 203. The upper and lower ends of the lifting shell 201 are respectively provided with a driving member 204 and a tensioning member 205 that work together on the traction bar 206. The traction bar 206 is wound around the shaft end of the driving member 204 and the tensioning member 205. A hopper 207 for lifting coal and mineral materials from the lifting feed inlet 202 to the lifting discharge outlet 203 is fixed on the traction bar 206.

[0049] In one embodiment of the present invention, the crushing unit 3 includes a crushing box 301 located between two lifting units 2. The top of the crushing box 301 is provided with a crushing feed port 302 corresponding to the two lifting discharge ports 203. A crushing shaft 303 is rotatably connected inside the crushing box 301, and the shaft of the crushing shaft 303 is provided with a crushing stirring blade 304. The bottom of the crushing box 301 is provided with a crushing discharge port 305.

[0050] Specifically, when collecting coal and mineral materials, the collection vehicle, after connecting and cooperating with the feeding unit 1, pours the collected coal and mineral materials into the feeding hopper 101. Under its own gravity, the coal and mineral materials fall from the inclined chute 103 at the bottom of the feeding hopper 101 and land on the first conveyor belt 104 located inside the base frame 102 and correspondingly below the inclined chute 103. The support roller 1053 provides stable support for the first conveyor belt 104, reducing sagging and deformation during the conveying process. At the same time, the rotational characteristics of the support roller 1053 effectively reduce the friction between the conveyor belt and the support component 105, extending the service life of the conveyor belt. The first conveyor belt 104 transports the material to the output port, and the material is discharged through the discharge chute 107. At this time, the bottom side of the lifting unit 2 is connected to the discharge chute 107. The lifting feed inlet 202, which is matched with the feed trough 107, receives the material from the discharge trough 107. The coal and mineral materials are lifted from the lifting feed inlet 202 to the lifting discharge outlet 203 via the traction bar 206. As the traction bar 206 moves, the material is lifted from the lifting feed inlet 202 to the lifting discharge outlet 203 on the other side of the top of the lifting shell 201, and then enters the crushing box 301 through the crushing feed inlet 302. Subsequently, the crushing unit 3 starts to operate. The crushing shaft 303, which is rotatably connected inside the crushing box 301, drives the crushing and stirring blades 304 on its shaft to rotate, crushing the material entering the crushing box 301. The crushed material is discharged from the crushing discharge outlet 305 at the bottom of the crushing box 301 and falls into the subsequent screening unit 4.

[0051] like Figure 7-11 As shown, in one embodiment of the present invention, the screening unit 4 includes a support frame 401. Each of the four top corners of the support frame 401 is provided with a first spring 402. The top of the first springs 402 is connected to an inclined fixed frame 403. A sieve plate 404 is installed inside the fixed frame 403. Baffles 407 are provided on the top of both sides of the fixed frame 403. A guide groove 405 is provided at the bottom of the fixed frame 403 corresponding to the lower part of the sieve plate 404. A vibrating element 406 is fixedly installed on the outer side of the guide groove 405. The vibrating element 406 is an electromagnetic vibrator. By adjusting the current magnitude and frequency of the electromagnetic vibrator, the vibration amplitude and frequency of the fixed frame 403 and the sieve plate 404 can be precisely controlled.

[0052] In one embodiment of the present invention, the bottom of the two side supports of the support frame 401 are fixedly connected to the side plates 409 by the connecting rods 408. The upper end face of the two side plates 409 is provided with the fixing plate 410. Each side plate 409 is provided with a movable box 411. A rotating body 412 is rotatably provided in the movable box 411. A spiral groove 413 is opened on the outer surface of the rotating body 412. Movable blocks 414 are symmetrically installed in the spiral groove 413 about the axis of the rotating body 412. A U-shaped frame 415 is fixedly connected to the side opposite to the two movable blocks 414. A movable rod 416 is fixedly connected to the side end face of the U-shaped frame 415. A drive box 417 with a drive source is provided on the side of the movable box 411. The drive source in the drive box 417 drives the rotating body 412 in the movable box 411 to rotate through the connecting shaft.

[0053] Furthermore, the screening unit 4 also includes a slide 418, which is opened on the upper surface of one side of the side plate 409. An extension rod 419 is fixedly connected to each side of the fixed frame 403. An auxiliary slider 420 that slides in the slide 418 is provided at the bottom of the extension rod 419. The auxiliary slider 420 is fixedly connected to the movable rod 416 on the side facing the movable box 411.

[0054] Furthermore, a plurality of second springs 421 are distributed along the plate body direction on the end face of the fixing plate 410 facing the fixing frame 403, and the other end of the plurality of second springs 421 is fixedly connected to the frame body of the fixing frame 403.

[0055] Specifically, the vibrating element 406 first starts operating, generating continuous and regular vibration. This vibration is directly transmitted to the fixed frame 403 connected to it, causing the fixed frame 403 and the screen plate 404 installed inside it to vibrate together. When the material to be screened is put into the screen plate 404, under the vibration caused by the vibrating element 406, the material begins to jump and roll on the screen plate 404. Fine materials that meet the particle size requirements can pass smoothly through the screen holes of the screen plate 404 and fall into the corresponding guide groove 405 below. Large particles that do not meet the particle size requirements remain on the screen plate 404 because they cannot pass through the screen holes, thus initially achieving the screening and separation of materials.

[0056] At the same time, the drive source in the drive box 417 is activated, transmitting power to the rotating body 412 in the movable box 411 through the connecting shaft, causing the rotating body 412 to start rotating. Since the outer surface of the rotating body 412 has a spiral groove 413, as the rotating body 412 continues to rotate, the relative position of the spiral groove 413 and the movable block 414 installed therein changes continuously, forcing the movable block 414 to reciprocate along the trajectory of the spiral groove 413. The reciprocating motion of the movable block 414 causes the U-shaped frame 415 fixedly connected to it to follow the motion, which in turn causes the movable rod 416 fixedly connected to the side end face of the U-shaped frame 415 to also reciprocate linearly. The reciprocating linear motion of the movable rod 416 applies a lateral force to the fixed frame 403 through the auxiliary slider 420, so that the fixed frame 403 has a lateral vibration superimposed on the vibration originally caused by the vibrating element 406. Furthermore, the first springs 402 at the four corners of the top of the support frame 401 are connected to the fixed frame 403, providing elastic support for the fixed frame 403. Several second springs 421 distributed along the plate direction of the fixed plate 410 facing the end face of the fixed frame 403 are also connected to the fixed frame 403, further buffering and guiding the movement of the fixed frame 403. Under these multiple effects, the fixed frame 403 can more stably and efficiently superimpose lateral vibrations. This superposition of lateral vibrations further enhances the movement of the material on the screen plate 404, making the jumping and rolling of the material on the screen plate 404 more intense and thorough, greatly increasing the contact frequency and collision force between the material and the screen holes, allowing more material that meets the particle size requirements to pass through the screen holes faster. It also helps to shake out the material stuck in the screen holes, greatly enhancing the screening effect of the entire screening unit 4, and ultimately efficiently completing the material screening work. Meanwhile, the baffles 407 set on the top of both sides of the fixed frame 403 effectively prevent the material from spilling out from both sides during violent shaking.

[0057] like Figure 7 As shown, in one embodiment of the present invention, the recycling conveying unit 5 includes a second conveyor belt 501, which is bidirectional and is disposed on the lower side of the fixed frame 403. The collection conveying unit 6 includes a third conveyor belt 601, which is disposed below the guide trough 405.

[0058] Specifically, when the screening unit 4 screens out larger pieces of coal and mineral material that do not meet the particle size requirements, these materials fall onto the second conveyor belt 501 due to vibration on the inclined screen plate 404. The second conveyor belt 501, through the bidirectional transmission belt, transports the unqualified materials back to the feeding unit 1, so that they re-enter the crushing unit 3 for further crushing, forming a material circulation crushing mechanism to ensure that all coal and mineral material can meet the qualified particle size requirements. When the screening unit 4 screens out coal and mineral material that meets the particle size requirements, these materials fall onto the third conveyor belt 601 through the guide trough 405. The third conveyor belt 601 transports the qualified materials to the external collection box, realizing the efficient collection and storage of coal and mineral material.

[0059] It should be further noted that each unit is driven by an external driver source.

[0060] The first conveyor belt 104 is made of high-strength aramid rubber composite material. The aramid fiber reinforcement layer gives it excellent tensile strength, which can withstand the tension during large-scale coal and mineral material transportation and avoid breakage. The wear-resistant rubber layer on the surface is added with special wear-resistant particles to improve its wear resistance and effectively resist the frictional wear of sharp particles in coal and mineral materials.

[0061] The second conveyor belt 501 is made of polyurethane rubber, which features high strength, high elasticity, and wear resistance, making it particularly suitable for bidirectional transport of substandard coal and mineral materials. The high elasticity of the polyurethane material effectively cushions material impact during transport, reducing conveyor belt fatigue damage.

[0062] The third conveyor belt 601 is made of PVC solid-core flame-retardant conveyor belt. The solid-core structure gives it high lateral rigidity, making it less prone to deviation when conveying qualified coal and mineral materials.

[0063] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A coal collection device for coal mining, characterized in that, include: The crushing unit (3) is horizontally and stably set on the ground. It is used to crush coal materials so that large coal pieces are crushed into suitable particle sizes. Feeding units (1) are symmetrically arranged on both sides of the crushing unit (3). There are three sets of feeding units (1) on both sides at equal distances, which are used to receive coal and mineral materials from the coal mining site. The lifting unit (2) has six sets corresponding to the feeding unit (1) and is set on the side of the feeding unit (1) close to the crushing unit (3). The lifting unit (2) is used to receive the coal and mineral materials conveyed by the feeding unit (1) and convey them to the crushing unit (3). The screening unit (4) is located at the bottom of the crushing unit (3) and is used to receive the coal and mineral materials crushed by the crushing unit (3) and to screen and separate them. The side of the screening unit (4) is provided with a recycling conveying unit (5) for conveying the larger pieces of coal and mineral materials with unqualified particle size screened by the screening unit (4) back to the feeding unit (1) and a collection conveying unit (6) for conveying the coal and mineral materials with qualified particle size screened by the screening unit (4) to the external collection box. The recycling conveying unit (5) and the collection conveying unit (6) are connected to the screening unit (4).

2. A coal collection device for coal mining according to claim 1, characterized in that: The feeding unit (1) includes a feeding bin (101) disposed on a base frame (102). The bottom of the feeding bin (101) is provided with a sloping slot (103). A first conveyor belt (104) is disposed on the inner side of the base frame (102) and below the sloping slot (103). A plurality of support members (105) are distributed in the inner cavity of the first conveyor belt (104) along the belt body direction. A connecting frame (106) is provided on the side of the base frame (102) corresponding to the output port of the first conveyor belt (104). A discharge chute (107) is installed on the connecting frame (106).

3. A coal collection device for coal mining according to claim 2, characterized in that: The support member (105) includes a frame rod (1051) horizontally mounted on the side frame of the base frame (102). The frame rod (1051) is provided with uprights (1052) at equal intervals along the rod body direction. Support rollers (1053) are rotatably connected between adjacent uprights (1052).

4. A coal collection device for coal mining according to claim 1, characterized in that: The lifting unit (2) includes a lifting shell (201) located beside the feeding hopper (101). The bottom side of the lifting shell (201) is provided with a lifting feed inlet (202) that cooperates with the discharge chute (107), and the top side of the lifting shell (201) is provided with a lifting discharge outlet (203). The upper and lower ends of the lifting shell (201) are respectively provided with a driving member (204) and a tensioning member (205) that work together to pull the traction bar (206). The traction bar (206) is wrapped around the shaft end of the driving member (204) and the tensioning member (205). A hopper (207) for lifting coal and mineral materials from the lifting feed inlet (202) to the lifting discharge outlet (203) is fixed on the traction bar (206).

5. A coal collection device for coal mining according to claim 1, characterized in that: The crushing unit (3) includes a crushing box (301) located between the two lifting units (2). The top of the crushing box (301) is provided with a crushing feed port (302) corresponding to the two lifting discharge ports (203). The crushing box (301) is rotatably connected to a crushing shaft (303), and the shaft of the crushing shaft (303) is provided with crushing stirring blades (304). The bottom of the crushing box (301) is provided with a crushing discharge port (305).

6. A coal collection device for coal mining according to claim 1, characterized in that: The screening unit (4) includes a support frame (401). The support frame (401) has four first springs (402) at its top corners. The top of the first springs (402) is connected to an inclined fixed frame (403). The fixed frame (403) is equipped with a sieve plate (404). The top of both sides of the fixed frame (403) is equipped with baffles (407). The bottom of the fixed frame (403) is provided with a guide groove (405) corresponding to the bottom of the sieve plate (404). A vibrating element (406) is fixedly installed on the outside of the guide groove (405).

7. A coal collection device for coal mining according to claim 6, characterized in that: The support frame (401) has side plates (409) fixedly connected to the bottom of the two side supports by connecting rods (408). The upper end face of the two side plates (409) is provided with a fixing plate (410). Each side plate (409) is provided with a movable box (411). A rotating body (412) is rotatably provided in the movable box (411). The outer surface of the rotating body (412) is provided with a spiral groove (413). The spiral groove (413) is provided with a spiral groove about the rotation. The rotating body (412) is symmetrically equipped with movable blocks (414) at the axis. The movable blocks (414) on both sides are fixedly connected to a U-shaped frame (415) on the opposite side. The side end face of the U-shaped frame (415) is fixedly connected to a movable rod (416). The side of the movable box (411) is provided with a drive box (417) with a drive source. The drive source in the drive box (417) drives the rotating body (412) in the movable box (411) to rotate through the connecting shaft.

8. A coal collection device for coal mining according to claim 6, characterized in that: The screening unit (4) also includes a chute (418), which is opened on the upper surface of one side of the side plate (409). An extension rod (419) is fixedly connected to each side of the fixed frame (403). An auxiliary slider (420) that slides in the chute (418) is provided at the bottom of the extension rod (419). The auxiliary slider (420) is fixedly connected to the movable rod (416) on the side facing the movable box (411).

9. A coal collection device for coal mining according to claim 7, characterized in that: The end face of the fixing plate (410) facing the fixing frame (403) has a plurality of second springs (421) distributed along the plate body direction, and the other end of the plurality of second springs (421) is fixedly connected to the frame body of the fixing frame (403).

10. A coal collection device for coal mining according to claim 1, characterized in that: The recycling conveying unit (5) includes a second conveyor belt (501), which is bidirectional and is located on the lower side of the fixed frame (403). The collection conveying unit (6) includes a third conveyor belt (601), which is located below the guide trough (405).

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