Coal preparation device for coking

Abstract

The present invention relates to the technical field of coking coal preparation, and specifically to a coal preparation device for coking, comprising a frame, a conveying mechanism arranged on the frame, a distribution unit, and a collection unit; the conveying mechanism comprises a horizontally arranged conveyor belt, a driving unit for driving the conveyor belt to circulate, and a plurality of screening units arranged on the conveyor belt; the screening units comprise screening holes arranged on the conveyor belt, a supporting plate arranged in the screening holes, and a blocking assembly for closing or opening the screening holes according to the movement state of the supporting plate, the supporting plate being slidably connected to the screening holes, and an unloading member being arranged on the frame, and when the conveyor belt rotates so that the open end of the screening hole faces downward, the unloading member forces the blocking assembly to open the screening hole. This solution has a simple structure, does not require the equipment of photoelectric, pneumatic, computer, and other equipment, has low investment, does not consume energy, and does not generate radiation that harms the environment.

Description

Technical Field

[0001] The present invention relates to the technical field of coking coal preparation, and in particular to a coal preparation device for coking. Background Art

[0002] Coal preparation is a key production process in a coking plant. Raw coal contains both raw coal and gangue, which needs to be separated. Typically, the raw coal is first crushed and screened by a crushing and screening mechanism to obtain a mixture of raw coal and gangue of similar particle size. The screened mixture is then passed through a coal preparation device to separate the raw coal from the gangue, resulting in purer raw coal for subsequent coking. Dry coal preparation is a commonly used method for preparing coal. Existing dry coal preparation devices primarily screen gangue from coal through computer-controlled linkage of optoelectronic devices such as X-rays and pneumatic equipment. For example, CN 115301579 A discloses a gangue detection device and method for dry coal preparation. This solution requires a complex and extensive system of computer-controlled optoelectronic and pneumatic equipment, resulting in high investment and energy consumption. The generated X-rays and other radiation can cause environmental pollution, and subsequent maintenance costs are high. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a coal preparation device for coking, so as to solve the problems of the existing dry coal preparation device such as complex structure, high energy consumption and environmental unfriendliness.

[0004] To solve the above technical problems, the present invention adopts a basic solution: a coal preparation device for coking, comprising a frame, a conveying mechanism arranged on the frame, a distribution unit and a collection unit;

[0005] The conveying mechanism includes a horizontally arranged conveyor belt, a driving unit for driving the conveyor belt to circulate, and a plurality of screening units arranged on the conveyor belt;

[0006] The screening unit includes a screening hole arranged on the conveyor belt, a carrying plate arranged in the screening hole and a blocking assembly for closing or opening the screening hole according to the moving state of the carrying plate, the screening hole being a blind hole arranged on the upper surface of the conveyor belt along the thickness direction of the conveyor belt, the diameter of the screening hole being larger than the particle size of the mixture so that only one raw coal or one coal gangue can be stored in any screening hole, the carrying plate is slidably connected to the screening hole, a spring is arranged between the carrying plate and the bottom wall of the screening hole, when the mixture particles entering the screening hole cause the carrying plate to move downward a certain distance, the blocking assembly blocks the open end of the screening hole to prevent the material in the screening hole from escaping from the screening hole, an unloading member is provided on the frame, and when the conveyor belt rotates so that the open end of the screening hole faces downward, the unloading member forces the blocking assembly to open the screening hole;

[0007] The material distribution unit includes a material distribution plate fixedly connected to the frame, the material distribution plate is arranged above the conveyor belt along the width direction of the conveyor belt, and the material distribution plate is arranged close to the upper surface of the conveyor belt to prevent the mixed material from accumulating on the conveyor belt;

[0008] The collecting unit includes a raw coal collecting trough arranged below the discharge end of the conveyor belt and a gangue collecting trough arranged below the unloading member.

[0009] In the above basic scheme, the mixture of raw coal and gangue with similar particle size after screening is placed on the front surface of the conveyor belt, and the driving unit drives the conveyor belt to rotate in a cycle. The distribution plate distributes the material so that only one piece of raw coal or one piece of gangue is placed in each screening hole. When raw coal particles are placed in a certain screening hole, the raw coal particles cannot force the supporting plate to slide downward. When gangue particles are placed in a certain screening hole, the gangue forces the supporting plate to slide downward due to its heavy weight. When the supporting plate slides downward, the sealing The blocking assembly blocks the gangue in the screening hole, preventing it from escaping when the screening hole moves with the conveyor belt to the rear end of the conveyor belt. When the screening hole filled with gangue moves to the lower end of the unloading member, the unloading member forces the blocking assembly to open the screening hole, allowing the gangue in the screening hole to fall into the gangue collection trough below the unloading member. Raw coal particles in other screening holes, under the action of gravity, fall out of the screening holes and into the raw coal collection trough when passing the rear end of the conveyor belt, thus achieving the separation of raw coal and gangue. Compared with the existing technology, this solution has a simple structure, does not require equipment such as photoelectric, pneumatic, and computer equipment, has low investment, consumes no energy, and does not generate radiation that harms the environment.

[0010] Furthermore, the driving unit includes a driving sprocket group and a driven sprocket group arranged on the frame, a driving motor driving the driving sprocket group to rotate, and a chain connecting the driving sprocket group and the driven sprocket group, and the conveyor belt is fixedly connected to the chain.

[0011] Furthermore, the conveyor belt includes a plurality of plate-shaped chain blocks hinged in sequence, both ends of the chain blocks are fixedly connected to the chain, and the screening holes are provided on the chain blocks.

[0012] The transmission mechanism that this sliding part is connected with this sliding part is that this sliding part is to be locked in the locking cam, and this sliding part has the locking cam on the top of this sliding part and the locking cam on the bottom of this sliding part. The lower surface of the chain block is fixedly connected, the lower end of spring two is fixedly connected to the block, the socket is connected to the slide, the upper end of the push rod is provided with a hook-shaped body, and the hook-shaped body is provided with an inclined surface. The bearing plate is provided with a groove that is connected to the slide and the socket and allows the hook-shaped body to slide. One end of the slide is connected to the screening hole, and spring three is horizontally arranged in the slide, one end of the spring three is fixedly connected to the bottom wall of the slide, and the other end of spring three is fixedly connected to the slide column. An annular groove coaxial with the slide column is recessed on the cylindrical surface of the slide column near one end of the push rod, and a rope channel for the pull rope to slide is provided in the bearing plate. When the supporting plate slides to align the insertion hole with the slideway, the slide column is inserted into the insertion hole under the elastic force of the spring three and squeezes the inclined surface on the hook-shaped body to make the push rod slide and finally insert the hook-shaped body into the annular groove. The unloading part includes a horizontally arranged push plate, which is fixedly connected to the frame and is provided with an inclined surface. When the screening hole continues to move over the rear end of the conveyor belt, the inclined surface on the push plate forces the push rod to move so that the hook-shaped body on the push rod is separated from the annular groove on the slide column.

[0013] Furthermore, a baffle is provided below the front end of the conveyor belt, the baffle is provided horizontally, the baffle is fixedly connected to the frame, and the lower part of the push rod contacts the baffle to prevent the supporting plate from moving downward when the mixture is poured onto the conveyor belt.

[0014] Furthermore, the lower surface of the stopper is rotatably connected to the second roller to reduce the friction between the push rod and the baffle and the push plate.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] The coal gangue is pushed up and down by the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled out of the gear train, and the gear train is pulled

[0017] This solution has a simple structure, does not require the installation of photoelectric, pneumatic and computer equipment, has low investment, consumes no energy and does not generate radiation that harms the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 It is a structural schematic diagram of the main view direction of the present invention.

[0020] Figure 2 A schematic diagram of a portion of the structure of the present invention from the left side

[0021] Figure 3 for Figure 2 Enlarged view of part A in the middle.

[0022] Figure 4 for Figure 3 Schematic diagram of the structure after gangue is placed in the middle screening hole.

[0023] Figure 5 for Figure 4 Enlarged view of part C in the middle.

[0024] Figure 6 for Figure 2 Enlarged view of middle part B

[0025] Figure 7 Schematic diagram of the conveyor belt structure from the top view.

[0026] Figure 8 for Figure 2 Enlarged view of part D in the middle.

[0027] The meanings of the reference numerals in the accompanying drawings are:

[0028] Frame 10, slide rail 101, conveyor belt 20, chain block 201, screening hole 2011, slideway 2012, slide column 2013, pull rope 2014, annular groove 2016, rope channel 2017, spring three 2018, bearing plate 202, slide groove 2021, push rod 2022, socket 2023, block 2024, hook 2025, slot 2026, spring two 2027, roller two 2028, flap 2029, spring one 203, distribution plate 30, notch 301, raw coal collecting trough 40, gangue collecting trough 50, drive motor 601, chain 602, driving sprocket 603, synchronous shaft 604, roller one 605, driven sprocket 606, push plate 701, baffle 702, coal gangue 80. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0031] A coal preparation device for coking in this embodiment, such as Figure 1 、 Figure 2 As shown, it includes a frame 10 fixedly connected to the ground, a conveying mechanism arranged on the frame 10, a material distribution unit and a collection unit.

[0032] The conveying mechanism includes a horizontally arranged conveyor belt 20 , a driving unit for driving the conveyor belt 20 to circulate, and a plurality of screening units arranged on the conveyor belt 20 .

[0033] The screening unit includes a screening hole 2011 provided on the conveyor belt, a carrying plate 202 provided in the screening hole 2011, and a blocking component for closing or opening the screening hole 2011 according to the movement state of the carrying plate 202. The screening hole 2011 is a blind hole provided on the upper surface of the conveyor belt 20 along the thickness direction of the conveyor belt 20. The diameter of the screening hole 2011 is larger than the particle size of the mixture so that only one raw coal or one coal gangue can be stored in any screening hole 2011. The carrying plate 202 slides with the screening hole 2011. A spring 203 is provided between the supporting plate 202 and the bottom wall of the screening hole 2011. When the mixed material particles entering the screening hole 2011 cause the supporting plate 202 to move downward a certain distance, the blocking component blocks the open end of the screening hole 2011 to prevent the material in the screening hole 2011 from escaping from the screening hole 2011. An unloading component is provided on the frame 10. When the conveyor belt 20 rotates so that the open end of the screening hole 2011 faces downward, the unloading component forces the blocking component to open the screening hole 2011.

[0034] The material distribution unit includes a material distribution plate 30 fixedly connected to the frame 10. The material distribution plate 30 is arranged above the conveyor belt 20 along the width direction of the conveyor belt 20. The material distribution plate 30 is arranged close to the upper surface of the conveyor belt 20 to prevent the mixed material from accumulating on the conveyor belt 20.

[0035] The collecting unit includes a raw coal collecting trough 40 provided below the discharge end of the conveyor belt 20 and a gangue collecting trough 50 provided below the unloading member.

[0036] like Figure 1 、 Figure 2 As shown, the driving unit includes a driving sprocket group, a driven sprocket group, a driving motor 601 for driving the driving sprocket group to rotate, and a chain 602 connected to the driving sprocket group and the driven sprocket group. The conveyor belt 20 is fixedly connected to the chain 602. The driving sprocket group includes two driving sprockets 603 arranged along the width direction of the conveyor belt 20. The two driving sprockets 603 are coaxially fixedly connected through a synchronous shaft 604. Both ends of the synchronous shaft 604 are connected to the frame 1 0 rotation connection, 2 driving sprockets 603 are located at the rear end of the conveyor belt 20, the drive motor 601 is fixedly connected to the frame 10, the output shaft of the drive motor 601 is coaxially fixedly connected to the synchronous shaft 604, the drive motor 601 is externally connected to the power supply, the driven sprocket group includes 2 driven sprockets 606 arranged along the width direction of the conveyor belt 20, the 2 driven sprockets 606 are located at the front end of the conveyor belt 20, the 2 driving sprockets 603 are coaxially fixedly connected through another synchronous shaft, and both ends of the synchronous shaft are also rotationally connected to the frame 10. Figure 7As shown, the conveyor belt 20 includes a plurality of plate-shaped chain blocks 201 hinged in sequence, both ends of the chain blocks 201 are fixedly connected to the corresponding chains 602, and the screening holes 2011 are provided on the chain blocks 201. Figure 1 As shown, the frame 10 is fixedly connected to the slide rail 101, and the end of the chain 602 away from the chain block 201 is rotatably connected to a roller 605 that is rollingly connected to the slide rail 101.

[0037] Further, if Figure 2-Figure 6 As shown, the blocking assembly includes a slide groove 2021 perpendicular to the lower end surface of the supporting plate 202, a push rod 2022 slidingly engaged with the slide groove 2021, a socket 2023 arranged in the supporting plate 202 along the length direction of the conveyor belt 20, a slide 2012 arranged in the chain block 201 along the length direction of the conveyor belt 20, a slide post 2013 slidingly connected to the slide 2012, a flap 2029 rotatably connected to the upper surface of the chain block 201, and a pull rope 2014 with one end wound around the rotating shaft of the flap 2029 and the other end connected to the slide post 2013.

[0038] The rotating shaft of the flap 2029 is arranged along the width direction of the conveyor belt 20, and a torsion spring is arranged on the rotating shaft of the flap 2029 to force the flap 2029 to rotate and open the screening hole 2011. In this embodiment, the flap 2029 is mainly used to block the open end of the screening hole 2011 to prevent the coal gangue in the screening hole 2011 from escaping the screening hole. It can be understood that the flap 2029 is arranged corresponding to the middle part of the screening hole 2011, so that when the width of the flap 2029 is smaller than the diameter of the screening hole 2011, the coal gangue in the screening hole 2011 still cannot escape from the screening hole 2011. In actual design, the diameter of the screening hole 2011 is larger than the maximum outer size of the raw coal or coal gangue but can only accommodate one raw coal or one coal gangue at a time, and the width and thickness of the flap 2029 are both set to be smaller than the minimum outer size of the raw coal particles or coal gangue particles. Correspondingly, Figure 1 、 Figure 2 As shown, the distance between the distribution plate 30 and the upper surface of the conveyor belt 20 is greater than the thickness of the flap 2029 and smaller than the minimum external dimension of the raw coal or coal gangue. The distribution plate 30 is provided with a gap 301 corresponding to the flap 2029 for allowing the flap to pass through. The opening of the gap 301 is greater than the width of the flap 2029 and smaller than the minimum external dimension of the raw coal or coal gangue. Therefore, when the conveyor belt 20 moves to make the flap 2029 pass over the distribution plate 30, the distribution plate 30 can block the raw coal or coal gangue behind the flap 2029 so that the raw coal or coal gangue cannot pass over the distribution plate 30.

[0039] The slide groove 2021 is a blind hole with an opening at the lower end. The lower end of the push rod 2022 extends downwardly out of the chain block 201. The push rod 2022 is slidably connected to the chain block 201. The lower end of the push rod 2022 is fixedly connected to the stopper 2024. The lower end of the push rod 2022 is sleeved with a spring 2027. The upper end of the spring 2027 is fixedly connected to the lower surface of the chain block 201, and the lower end of the spring 2027 is fixedly connected to the stopper 2024. Figure 5 As shown, the insertion hole 2023 is connected to the slide 2021. The upper end of the push rod 2022 is provided with a hook 2025, which is provided with an inclined surface. The support plate 202 is provided with a slot 2026 that is connected to both the slide 2021 and the insertion hole 2023 and accommodates the sliding of the hook 2025. One end of the slide 2012 is connected to the screening hole 2011. A spring 3 2018 is horizontally disposed within the slide 2012. One end of the spring 3 2018 is fixedly connected to the bottom wall of the slide 2012, and the other end of the spring 3 2018 is fixedly connected to the slide post 2013. An annular groove 2016 coaxial with the slide post 2013 is recessed on the cylindrical surface of the slide post 2013 near one end of the push rod 2022. A rope channel 2017 is provided within the support plate 202 for accommodating the sliding of the pull rope 2014.

[0040] like Figure 3 As shown, the axes of the insertion hole 2023 and the slideway 2012 are both located in a plane perpendicular to the upper surface of the conveyor belt 20 along the length direction of the conveyor belt 20. Figure 3 In the state shown, the axis of the socket 2023 is located above the axis of the slideway 2012. It is understood that the diameter of the socket 2023 should be larger than the outer diameter of the slide post 2013 so that the slide post 2013 can be smoothly inserted into the socket 2023. Figure 4 、 Figure 5 As shown, when the support plate 202 is squeezed and slides downward so that the insertion hole 2023 is aligned with the slideway 2012, the slide post 2013 is inserted into the insertion hole 2023 under the elastic force of the spring 3 2018 and squeezes the inclined surface of the hook 2025 so that the push rod 2022 slides downward first and then upward under the elastic force of the spring 2 2027, and finally the hook 2025 is inserted into the annular groove 2016, so that the slide post 2013 cannot slide away from the push rod 2022 and disengage from the insertion hole 2023. Figure 2 、 Figure 5 、 Figure 6As shown, the unloading member includes a horizontally arranged push plate 701, which is fixedly connected to the frame 10. The push plate 701 is provided with an inclined surface. When the screening hole 2011 continues to move over the rear end of the conveyor belt 20 so that the opening of the screening hole 2011 faces downward, the inclined surface on the push plate 701 forces the push rod 2022 to slide so that the hook-shaped body 2025 on the push rod 2022 disengages from the annular groove 2016 on the slide column 2013.

[0041] like Figure 2 As shown, a baffle 702 is provided below the front end of the conveyor belt 20. The baffle 702 is provided horizontally and fixedly connected to the frame 10. The lower surface of the baffle 2024 is rotatably connected to the second roller 2028. Specifically, the lower surface of the baffle 2024 is fixedly connected to the roller seat. The second roller 2028 is mounted on the roller seat. The second roller 2028 reduces the friction between the push rod 2022 and the baffle 702 and the push plate 701. Figure 2 、 Figure 8 As shown, the rear end of the baffle 702 exceeds the distribution plate 30 toward the rear end of the conveyor belt 20. Before the distribution plate 30 evenly distributes the material to ensure that only one raw coal particle or one coal gangue particle is stored in each screening hole 2011, the roller 2028 at the bottom of the push rod 2022 is always in contact with the upper surface of the baffle 702 so that the upper end of the push rod 2022 supports the supporting plate 202 to prevent the supporting plate 202 from moving downward when the mixture is poured onto the upper surface of the front end of the conveyor belt 20 or when more than two particles of the mixture are stored in a screening hole 2011.

[0042] When the present invention is working, the mixture of raw coal and coal gangue with similar particle size after screening is placed on the front end surface of the conveyor belt 20, and the driving motor is driven to drive the conveyor belt to rotate cyclically. The conveyor belt 20 with the mixed material is covered by the distribution plate 30 so that only one raw coal or one coal gangue 80 can be placed in each screening hole 2011. At the same time, the distribution plate 30 prevents the mixture from remaining on the upper surface of the conveyor belt 20 and passing over the distribution plate 30. The mixture particles outside the screening hole 2011 are intercepted by the distribution plate 30 and re-occupy the new screening hole 2011. After the screening hole 2011 moves with the conveyor belt 20 to surpass the baffle 702, the lower end of the push rod 2022 is in a suspended state. If raw coal is stored in a certain screening hole 2011, When the raw coal particles are stored in a certain screening hole 2011, the weight of the raw coal particles cannot force the supporting plate 202 to slide downward so that the insertion hole 2023 is aligned with the slide 2012. When the coal gangue 80 particles are stored in a certain screening hole 2011, due to the heavy weight of the coal gangue 80, the coal gangue 80 forces the supporting plate 202 to slide downward, and the push rod 2022 also moves downward a certain distance. When the supporting plate 202 slides downward so that the insertion hole 2023 is aligned with the slide 2012, the slide column 2013 is inserted into the insertion hole 2023 under the elastic force of the spring 3 2018 and presses the inclined surface of the hook 2025 to make the push rod 2022 slide and finally make the hook 2025 inserted into the annular groove 2016, and slides. The column 2013 slides through the pull rope 2014 to force the flap 2029 to rotate and seal the screening hole 2011, and then the flap 2029 blocks the coal gangue 80 in the screening hole 2011 to prevent the coal gangue 80 in the screening hole 2011 from escaping from the screening hole 2011 when the screening hole 2011 moves to the rear end of the conveyor belt 20 with the conveyor belt 20. When the screening hole 2011 containing the coal gangue 80 moves to the bottom of the push plate 701, the inclined surface on the push plate 701 squeezes the push rod 2022 so that the push rod 2022 slides to make the hook 2025 disengage from the annular groove 2016, and the sliding column 2013 can slide away from the push rod 2022, and then under the weight of the coal gangue 80, the coal gangue 80 pushes the flap 2029 to close the screening hole 2011. The plate 2029 rotates to open the screening hole 2011, allowing the coal gangue 80 to escape from the screening hole 2011 and fall into the gangue collecting trough 50. When the coal gangue 80 pushes the flap 2029 to rotate and open the screening hole 2011, the flap 2029 drives the rotating shaft of the flap to rotate and wind the tightening rope 2014, causing the slide column 2013 to slide out of the socket 2023. Under the elastic force of spring 1 203, the supporting plate 202 is reset, the socket 2023 is staggered with the slide 2012, and the slide column 2013 cannot slide toward the push rod 2022. The torsion force of the torsion spring on the rotating shaft of the flap 2029 prevents the flap 2029 from flipping over to cover the screening hole 2011. As the conveyor belt 20 circulates, the raw coal and coal gangue 80 are continuously sorted. Compared with the existing technology, this solution has a simple structure, does not require the equipment of photoelectric, pneumatic and computer equipment, has low investment, consumes no energy and does not generate radiation that harms the environment.

[0043] The above are only embodiments of the present invention, and the common knowledge such as the specific structure and characteristics of the scheme are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A coal preparation device for coking, comprising a frame, a conveying mechanism provided on the frame, a distribution unit, and a collection unit; The conveying mechanism includes a horizontally arranged conveyor belt, a driving unit for driving the conveyor belt to circulate, and a plurality of screening units arranged on the conveyor belt; The screening unit includes a screening hole arranged on the conveyor belt, a carrying plate arranged in the screening hole and a blocking assembly for closing or opening the screening hole according to the moving state of the carrying plate, the screening hole being a blind hole arranged on the upper surface of the conveyor belt along the thickness direction of the conveyor belt, the diameter of the screening hole being larger than the particle size of the mixture so that only one raw coal or one coal gangue can be stored in any screening hole, the carrying plate is slidably connected to the screening hole, a spring is arranged between the carrying plate and the bottom wall of the screening hole, when the mixture particles entering the screening hole cause the carrying plate to move downward a certain distance, the blocking assembly blocks the open end of the screening hole to prevent the material in the screening hole from escaping from the screening hole, an unloading member is provided on the frame, and when the conveyor belt rotates so that the open end of the screening hole faces downward, the unloading member forces the blocking assembly to open the screening hole; The material distribution unit includes a material distribution plate fixedly connected to the frame, the material distribution plate is arranged above the conveyor belt along the width direction of the conveyor belt, and the material distribution plate is arranged close to the upper surface of the conveyor belt to prevent the mixed material from accumulating on the conveyor belt; The collecting unit includes a raw coal collecting trough arranged below the discharge end of the conveyor belt and a gangue collecting trough arranged below the unloading member.

2. The coal preparation device for coking according to claim 1, characterized in that: The driving unit includes a driving sprocket group and a driven sprocket group arranged on the frame, a driving motor for driving the driving sprocket group to rotate, and a chain connecting the driving sprocket group and the driven sprocket group, and the conveyor belt is fixedly connected to the chain.

3. The coal preparation device for coking according to claim 2, characterized in that: The conveyor belt comprises a plurality of plate-shaped chain blocks hinged in sequence, both ends of the chain blocks are fixedly connected to the chain, and the screening holes are arranged on the chain blocks.

4. The coal preparation device for coking according to claim 3, characterized in that: The transmission mechanism that this sliding part is connected with this sliding part is that the sliding part is in the rotation with the cam face, and the sliding part has the shape of a cam face and the like, and the sliding part has the shape of a cam face and the like. The cam is fixedly connected to the lower surface of the slide, the lower end of the spring is fixedly connected to the stop block, the socket is communicated with the slide groove, the upper end of the push rod is provided with a hook-shaped body, the hook-shaped body is provided with an inclined surface, the bearing plate is provided with a slot that is communicated with the slide groove and the socket and allows the hook-shaped body to slide, one end of the slide is communicated with the screening hole, a spring three is horizontally arranged in the slide, one end of the spring three is fixedly connected to the bottom wall of the slide, the other end of the spring three is fixedly connected to the slide post, and the cylindrical surface of the slide post near one end of the push rod is concavely provided with an annular groove coaxial with the slide post, and the bearing plate is provided with a rope channel for the sliding of the pull rope; When the supporting plate slides to align the insertion hole with the slideway, the slide column is inserted into the insertion hole under the elastic force of the spring three and squeezes the inclined surface on the hook-shaped body to make the push rod slide and finally insert the hook-shaped body into the annular groove. The unloading part includes a horizontally arranged push plate, which is fixedly connected to the frame and is provided with an inclined surface. When the screening hole continues to move over the rear end of the conveyor belt, the inclined surface on the push plate forces the push rod to move so that the hook-shaped body on the push rod is separated from the annular groove on the slide column.

5. The coal preparation device for coking according to claim 4, characterized in that: A baffle is provided below the front end of the conveyor belt, the baffle is arranged horizontally, and the baffle is fixedly connected to the frame.

6. The coal preparation device for coking according to claim 5, characterized in that: The lower surface of the stopper is rotatably connected to the second roller.

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