A coal mine underground dry separator discharge device

Abstract

This invention relates to the field of coal sorting technology, specifically to a discharge device for a dry coal separator in underground mines. It includes a discharge box and a frame supporting the discharge box. The discharge box is connected to the discharge end of the dry separator. The nozzles of the dry separator are aligned with the inside of the discharge box. Two independently driven conveyor belts are located below the discharge box. The inlet of the discharge box is aligned with the nozzles. The central space inside the discharge box is separated front and back by a central partition, and the lower space inside the discharge box is separated left and right by a lower partition. The two independent discharge ports of the discharge box open downwards and span the two conveyor belts. A drive groove is provided at the bottom of the discharge box near the left and right edges, facing upwards. Through a reasonable structural design, this invention achieves automatic reversal and fixed discharge of coal and gangue under different injection modes without changing the original nozzle control logic of the dry separator, thereby ensuring that coal always falls onto the same side conveyor belt and gangue always falls onto the other side conveyor belt.

Description

Technical Field

[0001] This invention relates to the field of coal sorting technology, specifically to a discharge device for an underground dry coal sorting machine. Background Technology

[0002] During underground coal mining, a large amount of roof, floor, and interbedded gangue rocks inevitably mix in, significantly increasing the gangue content of the raw coal. This not only reduces the calorific value and combustion efficiency of the coal, but also produces more harmful gases during subsequent combustion, causing long-term impacts on the ecological environment. Therefore, in the process of coal processing and utilization, coal gangue separation is a key link in achieving clean and efficient utilization of coal, and has important practical significance and strategic value.

[0003] Currently, dry separators based on dual-energy X-ray identification technology are widely used in underground coal mines to separate coal from gangue. Existing dry separators typically include a conveyor belt, an identification system, a nozzle array, and two parallel conveyor belts located at the discharge end of the dry separator. The nozzle array separates the target material by blowing air according to the identification results.

[0004] In existing technologies, the following two working modes typically exist: a. Gangue blowing mode: When the coal content in the raw coal is high, gangue is blown through nozzles onto a conveyor belt that is farther away, while the coal falls to a conveyor belt that is closer by free fall. b. Coal blowing mode: When the raw coal has a high gangue content, the coal is blown through nozzles to the far end conveyor belt, and the gangue falls freely to the near end conveyor belt.

[0005] While the above two methods can achieve coal and gangue separation, they have significant shortcomings in practical applications: a. The discharge positions of coal and gangue at the discharge end will change as the injection mode is switched; b. The downstream conveying, storage and subsequent processing systems require frequent adjustments or switching, which increases the system complexity and operating costs; c. In situations where downhole space is limited and automation is required, frequent switching of discharge logic is detrimental to the stable operation of the system.

[0006] Therefore, there is an urgent need for a simple and reliable discharge device that ensures that coal always falls onto the same side of the conveyor belt and gangue always falls onto the other side of the conveyor belt, regardless of whether coal blowing mode or gangue blowing mode is used, so as to improve the versatility and stability of the system. Summary of the Invention

[0007] To overcome the shortcomings of existing technologies, this invention proposes a discharge device for a coal mine dry separator. Through reasonable structural design, this invention achieves automatic reversal and fixed discharge of coal and gangue under different injection modes without changing the original nozzle control logic of the dry separator, thereby ensuring that coal always falls into the same side conveyor belt and gangue always falls into the other side conveyor belt.

[0008] The technical solution adopted by this invention to solve its technical problem is as follows: A coal mine underground dry separator discharge device includes a discharge box and a frame supporting the discharge box; the discharge box is connected to the discharge end of the dry separator; the nozzle of the dry separator is aligned with the inner side of the discharge box; two independently driven conveyor belts are provided below the discharge box; the inlet of the discharge box is aligned with the nozzle; the middle space inside the discharge box is separated front and back by a middle partition, and the lower space inside the discharge box is separated left and right by a lower partition; the two independently driven conveyor belts of the discharge box... The discharge port faces downwards and spans two conveyor belts; a drive groove is provided at the bottom of the discharge box near the left and right edges, facing upwards; the drive groove is rotatably connected to a screw; the screw is driven by a drive motor; a drive block is slidably connected to the drive groove; the drive block is threadedly connected to the screw; a take-up roller is connected to the drive block on the side facing the lower partition; the outer wall of the take-up roller is fixedly connected to the discharge belt; the width of the discharge belt is adapted to the left and right width of the discharge port of the discharge box; the discharge belt is inclined, and the upper end is fixedly connected to the inner wall of the discharge box.

[0009] Preferably, the drive block passes through and is rotatably connected to the drive rod; one end of the drive rod is connected to the end of the take-up roller, and the other end is fixedly connected to a gear; the gear meshes with a rack; the rack is fixedly connected to the left and right edges of the bottom of the discharge box.

[0010] Preferably, the lower surface of the lower partition is provided with two elongated pulling grooves; the length direction of the pulling groove is consistent with the front-to-back direction; a pulling block is slidably connected in the pulling groove; the pulling block passes through and is rotatably connected to a pulling rod; the end of the pulling rod is connected to the end of the take-up roller.

[0011] Preferably, the end of the take-up roller is eccentrically connected to the drive bar and the pull bar.

[0012] Preferably, the end of the take-up roller is provided with a square groove passing through the center; the square groove is elongated; a square block is slidably connected in the square groove; the square block is fixedly connected to the corresponding drive rod and pull rod; threaded holes pass through both ends of the square groove; bolts pass through and are threadedly connected in the threaded holes.

[0013] Preferably, the driving block and the corresponding pulling block are fixedly connected to a U-shaped plate below; a scraping groove is provided on the inner side of the U-shaped plate; a scraper is slidably connected in the scraping groove; the scraper is connected to the bottom of the scraping groove through a scraping spring.

[0014] Preferably, the lower surface of the drive block and the pull block is provided with an arc-shaped groove; the end of the U-shaped plate is movably connected in the corresponding arc-shaped groove.

[0015] Preferably, reinforcing ribs are uniformly arranged inside the discharge belt along its length; the reinforcing ribs are rod-shaped; and the length of the reinforcing ribs is the same as the width of the discharge belt.

[0016] Preferably, the discharge box and the lower partition are provided with arc-shaped reinforcing grooves; the center of the arc of the reinforcing groove is consistent with the upper end of the discharge belt; a reinforcing block is movably connected inside the reinforcing groove; the reinforcing block is rotatably connected to the corresponding reinforcing rib.

[0017] The beneficial effects of this invention are as follows: 1. Through reasonable structural design, this invention achieves automatic reversal and fixed material dropping of coal and gangue under different injection modes without changing the original nozzle control logic of the dry separator, thereby ensuring that coal always falls into the same side conveyor belt and gangue always falls into the other side conveyor belt.

[0018] 2. This invention utilizes the meshing of gears and racks, so that as the drive block moves the winding roller back and forth, it can drive the lower end of the discharge belt to be wound and unwound. This allows the length of the discharge belt to change according to the discharge requirements, thereby changing the discharge position while maintaining a consistent discharge height, ensuring smooth discharge and avoiding material impact caused by large discharge drop.

[0019] 3. During the rotation of the winding roller of the present invention, the winding roller will wind or unwind the discharge belt. The contact position between the eccentric winding roller and the lower end of the discharge belt will fluctuate up and down continuously during the rotation. This will cause the lower end of the discharge belt to vibrate up and down, so that the material on the discharge belt will slide off quickly under the vibration, avoiding the situation where material residue causes gangue and coal to mix. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a perspective view of the present invention; Figure 2 This is a perspective view of the discharge box in this invention; Figure 3 yes Figure 2 A stereoscopic view from another angle; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 This is a diagram showing the position of the scraper spring in this invention; Figure 6 yes Figure 3Enlarged view of point B in the middle; Figure 7 yes Figure 3 Enlarged view of point C in the middle; Figure 8 This is a perspective view of the discharge belt in this invention; Figure 9 yes Figure 8 Enlarged view of point D in the middle; Figure 10 This is a diagram showing the positions of the square groove and the square block in this invention.

[0022] In the diagram: 1. Discharge box, 11. Inlet, 12. Middle partition, 13. Lower partition, 14. Discharge port, 15. Drive groove, 16. Screw, 17. Drive motor, 18. Pull groove, 19. Reinforcing groove, 2. Frame, 3. Conveyor belt, 4. Drive block, 41. Drive rod, 42. Gear, 43. Rack, 44. Arc groove, 5. Take-up roller, 5. Square groove, 51. Square block, 52. Threaded hole, 53. Bolt, 54. Discharge belt, 6. Reinforcing rib, 61. Reinforcing block, 62. Pull block, 71. Pull rod, 8. U-shaped plate, 81. Scraper groove, 82. Scraper strip, 83. Scraper spring. Detailed Implementation

[0023] 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.

[0024] like Figures 1 to 10 As shown, the present invention includes the following embodiments: Example 1: A discharge device for a dry coal separator in an underground mine includes a discharge box 1 and a frame 2 supporting the discharge box 1; the discharge box 1 is connected to the discharge end of the dry separator; the nozzle of the dry separator is aligned with the inner side of the discharge box 1; two independently driven conveyor belts 3 are provided below the discharge box 1; the inlet 11 of the discharge box 1 is aligned with the nozzle; the central space inside the discharge box 1 is separated front and back by a middle partition 12, and the lower space inside the discharge box 1 is separated left and right by a lower partition 13; the two independent discharge ports 14 of the discharge box 1 open downwards and span the two conveyor belts. 3; A drive groove 15 is provided at the bottom of the discharge box 1 near the left and right edges facing upwards; the drive groove 15 is rotatably connected to a screw 16; the screw 16 is driven by a drive motor 17; a drive block 4 is slidably connected in the drive groove 15; the drive block 4 is threadedly connected to the screw 16; a take-up roller 5 is connected to the drive block 4 on the side facing the lower partition 13; a discharge belt 6 is fixedly connected to the outer wall of the take-up roller 5; the width of the discharge belt 6 is adapted to the width of the discharge port 14 of the discharge box 1 in the left and right direction; the discharge belt 6 is inclined and its upper end is fixedly connected to the inner wall of the discharge box 1.

[0025] In this embodiment, the drive block 4 passes through and is rotatably connected to the drive rod 41; one end of the drive rod 41 is connected to the end of the winding roller 5, and the other end is fixedly connected to the gear 42; the gear 42 meshes with the rack 43; the rack 43 is fixedly connected to the left and right edges of the bottom of the discharge box 1.

[0026] In this embodiment, an identification system is installed inside the dry separator. The nozzles of the dry separator are located at the discharge end of the dry separator. The two conveyor belts 3 are parallel and driven independently. The discharge box 1 is used to receive coal or gangue sprayed by the nozzles or falling freely. The discharge of the discharge box 1 has two working states. In the first working state, the material sprayed by the nozzles is guided to the far conveyor belt 3, and the falling material is guided to the near conveyor belt 3. In the second working state, the material sprayed by the nozzles is guided to the near conveyor belt 3, and the falling material is guided to the far conveyor belt 3. This ensures that in the coal blowing mode or gangue blowing mode, the coal always falls into the far conveyor belt 3, and the gangue always falls into the near conveyor belt 3. For ease of explanation, the conveyor belt 3 closer to the sorting position of the sorting machine is called the closer conveyor belt 3, and the conveyor belt 3 farther away from the sorting position of the sorting machine is called the farther conveyor belt 3. The two discharge channels are also divided into two, closer and farther, by the partition plate 12. The discharge belt 6 on the left is connected to the closer discharge channel, and the discharge belt 6 on the right is connected to the farther discharge channel. When the coal content at the dry separator's discharge end is less than the gangue content, the drive motor 17 drives the screw 16 to rotate. The screw 16 slides along the drive groove 15 via the screw drive block 4. The left drive block 4 drives the corresponding take-up roller 5 and gear 42 to move backward. The right gear 42 meshes with the corresponding rack 43, causing the left take-up roller 5 to rotate and move backward. During the backward movement of the left take-up roller 5, it will wind up the lower end of the left discharge belt 6 until the left take-up roller 5 moves close to the top of the conveyor belt 3. The right drive block 4 will... The corresponding take-up roller 5 and gear 42 are moved forward. The right gear 42 will mesh with the corresponding rack 43, thus causing the right take-up roller 5 to rotate and move forward. During the forward movement of the right take-up roller 5, it will take up the lower end of the right discharge belt 6 until the right take-up roller 5 moves to the top of the closer conveyor belt 3. The nozzle will blow the coal to the farther discharge channel and finally guide it to the farther conveyor belt 3 along the right discharge belt 6. The gangue falls into the closer discharge channel under the action of free fall and is finally guided to the closer conveyor belt 3 along the left discharge belt 6. When the coal content at the dry separator's discharge end is greater than the gangue content, the drive motor 17 drives the screw 16 to rotate. The screw 16 slides along the drive groove 15 via the screw drive block 4. The left drive block 4 drives the corresponding take-up roller 5 and gear 42 to move forward. The right gear 42 meshes with the corresponding rack 43, thus causing the left take-up roller 5 to rotate and move forward. During the forward movement of the left take-up roller 5, it unwinds the lower end of the left discharge belt 6 until the left take-up roller 5 moves directly above the far conveyor belt 3. The right drive block 4 then... The corresponding take-up roller 5 and gear 42 move backward. The right gear 42 will mesh with the corresponding rack 43, thus causing the right take-up roller 5 to rotate and move backward. During the backward movement of the right take-up roller 5, it will unwind the lower end of the right discharge belt 6 until the right take-up roller 5 moves to the top of the closer conveyor belt 3. The nozzle will blow the gangue to the farther discharge channel and finally guide it to the closer conveyor belt 3 along the right discharge belt 6. The coal falls into the closer discharge channel under free fall and is finally guided to the farther conveyor belt 3 along the left discharge belt 6. In this embodiment, the discharge logic is fixed. Regardless of whether the coal blowing mode or the gangue blowing mode is used, the drop positions of coal and gangue are always consistent, which facilitates the unified layout of downstream conveying and processing systems, adapts to multiple operating conditions, and allows for flexible switching of the injection mode according to the changes in the gangue content of the raw coal without adjusting the structure of the discharge system, thus improving the applicability of the equipment. The present invention has a simple structure, high reliability, and a compact structure of the discharge belt 6, which is suitable for underground environments with limited space. It is easy to maintain, has low operating and maintenance costs, avoids equipment adjustments and misoperations caused by frequent changes in the discharge direction, improves system stability, and provides overall automated control, making it more intelligent. Through a reasonable structural design, this invention achieves automatic reversal and fixed material dropping of coal and gangue under different injection modes without changing the original nozzle control logic of the dry separator, thereby ensuring that coal always falls into the same side conveyor belt 3 and gangue always falls into the other side conveyor belt 3. The present invention utilizes the meshing of gear 42 and rack 43 so that the drive block 4 drives the winding roller 5 to move back and forth, thereby driving the lower end of the discharge belt 6 to be wound and unwound. This allows the length of the discharge belt 6 to change according to the discharge requirements, thus ensuring that the discharge position changes while the discharge height remains consistent, thereby ensuring smooth discharge and avoiding material impact caused by large discharge drop.

[0027] Example 2: The lower surface of the lower partition 13 is provided with two elongated pull grooves 18; the length direction of the pull groove 18 is consistent with the front-to-back direction; a pull block 7 is slidably connected in the pull groove 18; the pull block 7 passes through and is rotatably connected to a pull rod 71; the end of the pull rod 71 is connected to the end of the take-up roller 5.

[0028] Since one end of the take-up roller 5 is connected to the pull rod 71 and the other end is connected to the drive rod 41, the drive block 4 moves back and forth, which in turn drives the drive rod 41 to move back and forth. The drive rod 41 moves back and forth, which in turn drives the take-up roller 5 to move back and forth. The take-up roller 5 moves back and forth, which in turn drives the pull rod 71 to move back and forth. The pull rod 71 drives the pull block 7 to slide back and forth along the pull groove 18. Both ends of the take-up roller 5 are supported, thus increasing the support strength of the lower end of the discharge belt 6 and improving the durability of the discharge device.

[0029] Example 3: The end of the take-up roller 5 is eccentrically connected to the drive rod 41 and the pull rod 71.

[0030] In this embodiment, the end of the take-up roller 5 is provided with a square groove 51 passing through the center; the square groove 51 is elongated; a square block 52 is slidably connected in the square groove 51; the square block 52 is fixedly connected to the corresponding drive rod 41 and the pull rod 71; the two ends of the square groove 51 pass through threaded holes 53; bolts 54 pass through and are threadedly connected in the threaded holes 53.

[0031] During the back-and-forth movement of the drive block 4, the drive rod 41 will move back and forth. The drive rod 41 rotates under the meshing of the gear 42 and the rack 43. During the rotation of the drive rod 41, the eccentric take-up roller 5 will rotate. During the rotation of the take-up roller 5, the discharge belt 6 will be wound or unwound. During the rotation of the eccentric take-up roller 5, the contact position with the lower end of the discharge belt 6 will fluctuate up and down continuously. This will cause the lower end of the discharge belt 6 to vibrate up and down, so that the material on the discharge belt 6 will slide down quickly under the action of vibration, avoiding the situation of material residue causing gangue and coal to mix. Before using the discharge belt 6 in the discharge device for material reversal, first turn the bolt 54 in the threaded hole 53 to rotate and move it out of the square groove 51. Then, control the square groove 51 and the square block 52 to slide. The closer the square block 52 is to the center of the end of the take-up roller 5, the smaller the eccentricity between the end of the take-up roller 5 and the drive rod 41 and the pull rod 71, and vice versa. In this way, the eccentricity can be adjusted according to different situations. After the position of the square block 52 in the square groove 51 is adjusted, turn the bolt 54 in the threaded hole 53. The end of the bolt 54 will abut against the outer wall of the square block 52 in the square groove 51, so that the square block 52 can slide out of the square groove 51. The purpose of locking the position within the square groove 51 is as follows: When the material is relatively small, the degree of eccentricity can be increased to improve the vibration frequency of the discharge belt 6, achieving better discharge; when the material is relatively complete and large, the degree of eccentricity can be reduced to decrease the shaking of the discharge belt 6, reducing the damage caused by the material shaking to the compression of the discharge belt 6, thus protecting the discharge belt 6; in this embodiment, the bolt can be replaced by a miniature electric push rod. The extension and retraction of the miniature electric push rod will change the position of the square block 52 within the square groove 51. This is the second adjustment method for the square block 52 within the square groove 51, which is more intelligent and automated.

[0032] Example 4: The driving block 4 and the corresponding pulling block 7 are fixedly connected to the U-shaped plate 8 below; a scraping groove 81 is provided on the inner side of the U-shaped plate 8; a scraper 82 is slidably connected in the scraping groove 81; the scraper 82 is connected to the bottom of the scraping groove 81 through a scraping spring 83.

[0033] In this embodiment, the lower surfaces of the driving block 4 and the pulling block 7 are provided with arc-shaped grooves 44; the end of the U-shaped plate 8 is movably connected in the corresponding arc-shaped groove 44.

[0034] Taking the right-hand take-up roller 5 as an example, as the right-hand take-up roller 5 moves forward driven by the drive motor 17, it winds up the right-hand discharge belt 6. Before winding, the discharge belt 6 passes through the scraper 82. Under the action of the scraper spring 83, the scraper 82 abuts against the outer wall of the discharge belt 6, thereby scraping the debris on the outer surface of the discharge belt 6. This scraping causes the debris on the outer surface of the discharge belt 6 to fall off, allowing the discharge belt 6 to... Before winding, keep the surface clean to prevent debris from adhering to the outer surface of the discharge belt 6 and affecting winding. During the backward movement of the winding roller 5 in the right position, the scraper 82 remains against the outer surface of the discharge belt 6 under the elastic force of the scraper spring 83. Whether the winding roller 5 is unwinding or winding, the scraper 82 always remains against the outer surface of the discharge belt 6. Furthermore, during the forward movement of the winding roller 5 in the right position, the friction between the discharge belt 6 and the scraper 82 will cause the U-shaped plate 8 to move along the arc groove 44. After the take-up roller 5 moves to a position directly above the far conveyor belt 3, the inclination of the discharge belt 6 becomes gentler, and the inclination of the U-shaped plate 8 and the scraper 82 adapts to the inclination of the discharge belt 6. During the backward movement of the take-up roller 5 in the right position, the friction between the discharge belt 6 and the scraper 82 will cause the U-shaped plate 8 to move in the opposite direction along the arc groove 44. After the take-up roller 5 moves to a position directly above the near conveyor belt 3, the inclination of the discharge belt 6 becomes steeper, and the inclination of the U-shaped plate 8 and the scraper 82 adapts to the inclination of the discharge belt 6. In this way, the U-shaped plate 8 and the scraper 82 can extend the material sliding down the discharge belt 6, so that the material on the discharge belt 6 is closer to the conveyor belt 3, achieving stable discharge. More importantly, because the U-shaped plate 8 and the scraper 82 adapt to the discharge inclination of the discharge belt 6, the material sliding down the discharge belt 6 can more easily carry away the debris attached to the U-shaped plate 8 and the scraper 82, achieving the purpose of self-cleaning.

[0035] Example 5: The discharge belt 6 is provided with reinforcing ribs 61 evenly arranged inside and along its length; the reinforcing ribs 61 are rod-shaped; the length of the reinforcing ribs 61 is the same as the width of the discharge belt 6.

[0036] In this embodiment, the surface of the discharge box 1 and the lower partition 13 is provided with an arc-shaped reinforcing groove 19; the arc center of the reinforcing groove 19 is consistent with the upper end of the discharge belt 6; a reinforcing block 62 is movably connected inside the reinforcing groove 19; the reinforcing block 62 is rotatably connected to the corresponding reinforcing rib 61.

[0037] During the material falling onto the surface of the discharge belt 6, the reinforcing ribs 61 are uniformly arranged along the length of the discharge belt 6, thus strengthening the discharge belt 6 and preventing it from bending in the width direction. This ensures stable material discharge. During the winding process of the discharge belt 6, the reinforcing ribs 61 do not affect the winding and unwinding of the winding roller 5. Furthermore, multiple arc-shaped reinforcing grooves 19 are symmetrically arranged on the inner wall of the discharge box 1 and the surface of the lower partition 13. The center of the arc of the reinforcing groove 19 is aligned with the upper end of the discharge belt 6. Therefore, when the tilt angle of the discharge belt 6 changes, the discharge belt 6 will drive the reinforcing block 62 at the end of the corresponding reinforcing rib 61 to move along the arc-shaped reinforcing groove 19. The rotational connection between the reinforcing block 62 and the reinforcing rib 61 prevents the discharge belt 6 from tilting in the width direction during the material discharge process, making the material discharge on the discharge belt 6 more stable and also improving the load-bearing capacity of the discharge belt 6 itself.

[0038] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be construed as indicating or implying relative importance. In the description of the present invention, "fixed connection" refers to a fixed connection.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A discharge device for a dry coal separator in an underground mine, comprising a discharge box and a frame supporting the discharge box; the discharge box is connected to the discharge end of the dry separator; the nozzle of the dry separator is aligned with the inside of the discharge box; characterized in that: Below the discharge box are two independently driven conveyor belts; the inlet of the discharge box is aligned with the nozzle; the central space inside the discharge box is separated front and back by a middle partition, and the lower space inside the discharge box is separated left and right by a lower partition; the two independent discharge ports of the discharge box face downwards and span the two conveyor belts; a drive groove is provided at the bottom of the discharge box near the left and right edges facing upwards; a screw is rotatably connected to the drive groove; the screw is driven by a drive motor; a drive block is slidably connected to the drive groove; the drive block is threadedly connected to the screw; a take-up roller is connected to the drive block facing the lower partition; the outer wall of the take-up roller is fixedly connected to the discharge belt; the width of the discharge belt is adapted to the left and right width of the discharge port of the discharge box; the discharge belt is inclined, and the upper end is fixedly connected to the inner wall of the discharge box.

2. The discharge device of a coal mine underground dry separator according to claim 1, characterized in that: The drive block passes through and is rotatably connected to the drive rod; one end of the drive rod is connected to the end of the take-up roller, and the other end is fixedly connected to a gear; the gear meshes with a rack; the rack is fixedly connected to the left and right edges of the bottom of the discharge box.

3. The discharge device of a coal mine underground dry separator according to claim 2, characterized in that: The lower surface of the lower partition plate is provided with two elongated pulling grooves; the length direction of the pulling groove is consistent with the front-to-back direction; a pulling block is slidably connected in the pulling groove; the pulling block passes through and is rotatably connected to a pulling rod; the end of the pulling rod is connected to the end of the take-up roller.

4. The discharge device of a coal mine underground dry separator according to claim 3, characterized in that: The end of the take-up roller is eccentrically connected to the drive bar and the pull bar.

5. The discharge device of a coal mine underground dry separator according to claim 4, characterized in that: The take-up roller has a centrally located square groove at its end; the square groove is elongated; a square block is slidably connected inside the square groove; the square block is fixedly connected to a corresponding drive rod and a pull rod; threaded holes pass through both ends of the square groove; bolts pass through and are threadedly connected inside the threaded holes.

6. The discharge device of a coal mine underground dry separator according to claim 2, characterized in that: The drive block and the corresponding pull block are fixedly connected to a U-shaped plate below; a scraping groove is provided on the inner side of the U-shaped plate; a scraper is slidably connected in the scraping groove; the scraper is connected to the bottom of the scraping groove through a scraping spring.

7. The discharge device of a coal mine underground dry separator according to claim 6, characterized in that: The driving block and the pulling block have arc-shaped grooves on their lower surfaces; the end of the U-shaped plate is movably connected to the corresponding arc-shaped groove.

8. The discharge device of a coal mine underground dry separator according to claim 2, characterized in that: The discharge belt has reinforcing ribs evenly arranged inside and along its length; the reinforcing ribs are rod-shaped; and the length of the reinforcing ribs is the same as the width of the discharge belt.

9. The discharge device of a coal mine underground dry separator according to claim 8, characterized in that: The discharge box and the lower partition are provided with arc-shaped reinforcing grooves; the center of the arc of the reinforcing groove is consistent with the upper end of the discharge belt; a reinforcing block is movably connected inside the reinforcing groove; the reinforcing block is rotatably connected to the corresponding reinforcing rib.

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