Coal crushing and screening plant

Abstract

This utility model relates to the field of coal processing technology and discloses a coal crushing and screening equipment, including a shell. Two crushing rollers are rotatably connected to the top inner side of the shell. A collection drawer is slidably connected to the bottom front side of the shell. A dust treatment mechanism is provided at the left front end of the shell, which creates negative pressure inside the shell and adsorbs some dust. A screening mechanism is provided in the middle inner side of the shell, which adjusts the screening of coal particles of different sizes. A drive mechanism is provided at the rear side of the shell. In this utility model, a low-speed fan draws air from the pull-out frame to create negative pressure. Dust-laden air inside the shell enters the pull-out frame, where large particles are blocked by a grid and then filtered by a dust filter element. This achieves effective adsorption and filtration of dust during coal crushing and screening, reducing diffusion and facilitating cleaning and maintenance, thus minimizing the impact of dust on equipment and operators.

Description

Technical Field

[0001] This utility model relates to the field of coal processing technology, and in particular to a coal crushing and screening equipment. Background Technology

[0002] Coal is a solid combustible mineral formed from the remains of ancient plants through geological processes. It is mainly composed of carbon, hydrogen, and oxygen and is an important energy and industrial raw material. It comes in various forms and can be classified into lignite, bituminous coal, anthracite, etc., according to different degrees of coalification. Coal is widely used in energy production, iron and steel smelting, and chemical manufacturing. It provides heat energy through combustion or is used as a raw material to be converted into various chemical products. In the process of coal utilization, it needs to be crushed and screened to process large pieces of coal into particles of different sizes to meet the needs of different applications. The efficiency and environmental friendliness of the crushing and screening process directly affect the overall benefits of coal processing.

[0003] Existing coal processing equipment mostly adopts an open or semi-open crushing structure. The crushing roller is driven by a motor to rotate at high speed, which squeezes and shears the coal. The crushed particles are separated into different particle sizes by a screening device. This equipment acts directly on the coal with mechanical force, which can quickly realize the crushing and screening of coal, avoid the problem of low efficiency of manual processing, and meet the basic needs of large-scale production.

[0004] However, this type of equipment generates a large amount of dust due to the collision and friction between coal particles during the crushing process. The equipment lacks effective dust collection and treatment components, and the dust spreads to the surrounding environment through the gaps and openings of the equipment. Although some equipment is equipped with simple dust covers, the cover and the main body of the equipment cannot form a closed space, and the dust will still overflow from the gaps. At the same time, the airflow generated by crushing will carry the dust further and spread, resulting in a dusty working environment that affects the health of the operators. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a coal crushing and screening equipment, which aims to improve the problem in the prior art where the airflow generated by crushing carries dust and causes the working environment to be filled with dust, affecting the health of operators.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a coal crushing and screening processing device, comprising a shell, two crushing rollers rotatably connected to the top inner side of the shell, a collection tray slidably connected to the bottom front side of the shell, a dust treatment mechanism provided at the left front end of the shell, the dust treatment mechanism being used to generate negative pressure inside the shell and adsorb some dust, a screening mechanism provided in the middle inner side of the shell, the screening mechanism being used to adjust the screening of coal particles of different sizes, and a driving mechanism provided at the rear side of the shell; The dust handling mechanism includes a pull-out frame that is slidably connected to the front left end of the housing. A grid is fixedly connected to the bottom inner side of the pull-out frame. A dust filter element is installed inside the pull-out frame. A magnetic plate is fixedly connected to the front side of the pull-out frame and is magnetically connected to the front side of the housing. Two low-speed fans are fixedly connected to the left side of the housing, and the input ends of the two low-speed fans are connected to the top of the pull-out frame.

[0007] As a further description of the above technical solution: The screening mechanism includes a screening plate, which is slidably connected to the middle of the front side of the outer shell. The top of the screening plate has multiple drop-out holes, and the bottom of the screening plate has multiple adjusting plates. The bottom of the front side of the multiple screening plates is rotatably connected to adjusting screws. The multiple adjusting plates are all threadedly connected to the outside of the adjusting screws at equal intervals. The front end of the adjusting screws is fixedly connected to a knob. The left and right ends of the front side of the screening plate are provided with fixing components.

[0008] As a further description of the above technical solution: The drive mechanism includes a mounting platform, which is fixedly connected to the rear left end of the housing. A drive motor is fixedly connected to the top of the mounting platform. Drive gears are fixedly connected to the front and rear ends of the two crushing rollers. A transmission assembly is provided between the output end of the drive motor and the left crushing roller.

[0009] As a further description of the above technical solution: The fixing assembly includes two ear plates, which are respectively fixedly connected to the left and right ends of the front side of the screening plate. Fixing bolts pass through the upper and lower ends of the front side of the two screening plates, and the ends of the multiple fixing bolts are respectively threaded to the left and right ends of the front side of the outer shell.

[0010] As a further description of the above technical solution: The transmission assembly includes two gear chains, which are respectively fixedly connected to the outer rear side of the left crushing roller and the output end of the drive motor. Both gear chains are meshed with transmission chains on their outer sides.

[0011] As a further description of the above technical solution: The fixing assembly also includes multiple ring handles, which are respectively fixedly connected to the front end of multiple fixing bolts, and the exterior of the multiple ring handles is designed to be non-slip.

[0012] As a further description of the above technical solution: A control panel is fixedly connected to the right side of the housing, and the control panel is electrically connected to two low-speed fans and a drive motor.

[0013] As a further description of the above technical solution: The top inner side of the outer casing features an inverted triangular design, while the bottom of the outer casing features an anti-slip design.

[0014] This utility model has the following beneficial effects: 1. In this utility model, a low-speed fan draws air from the pull-out frame to create negative pressure. Dust-laden air inside the outer shell enters the pull-out frame, where large particles are blocked by a grid and then filtered by a dust filter element. A magnetic suction plate seals the pull-out frame with the outer shell. During cleaning, the pull-out frame can be pulled out to replace the filter element. This achieves effective adsorption and filtration of dust in coal crushing and screening, reducing its diffusion. It also facilitates cleaning and maintenance, ensures a clean working environment, and reduces the impact of dust on equipment and operators.

[0015] 2. In this utility model, rotating the knob drives the adjusting screw to rotate, causing the adjusting plate to move along the screw axis, changing the relative position with the drop outlet to adjust the screening gap; the screening plate is fixed by the fixing bolts of the fixing component, and the coal particles are separated according to the gap size, realizing flexible adjustment of the screening particle size and accurate separation of coal particles of different sizes in coal crushing and screening, and the fixing component ensures screening stability, improving the applicability of the equipment and screening efficiency. Attached Figure Description

[0016] Figure 1 This is a perspective view of a coal crushing and screening processing equipment proposed in this utility model; Figure 2 This is a front view of a coal crushing and screening processing equipment proposed in this utility model; Figure 3 This is a partial structural breakdown diagram of the dust treatment mechanism in a coal crushing and screening equipment proposed in this utility model. Figure 4 This is a schematic diagram of the screening mechanism in a coal crushing and screening equipment proposed in this utility model; Figure 5 This is a schematic diagram of the drive mechanism in a coal crushing and screening equipment proposed in this utility model.

[0017] Legend: 1. Outer shell; 2. Crushing roller; 3. Collection drawer; 4. Dust handling mechanism; 41. Pull-out rack; 42. Grille; 43. Dust filter element; 44. Magnetic suction plate; 45. Low-speed fan; 5. Screening mechanism; 51. Screening plate; 52. Drop outlet; 53. Adjusting plate; 54. Adjusting screw; 55. Knob; 56. Fixing assembly; 561. Ear plate; 562. Fixing bolt; 563. Ring handle; 6. Drive mechanism; 61. Mounting platform; 62. Drive motor; 63. Drive gear; 64. Transmission assembly; 641. Gear chain; 642. Transmission chain; 7. Control panel. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Reference Figure 1 , Figure 2 and Figure 3 An embodiment of this utility model provides a coal crushing and screening equipment, including a shell 1, two crushing rollers 2 rotatably connected to the top inner side of the shell 1, a collection tray 3 slidably connected to the bottom front side of the shell 1, a dust treatment mechanism 4 provided at the left front end of the shell 1, the dust treatment mechanism 4 is used to generate negative pressure inside the shell 1 and adsorb some dust, a screening mechanism 5 is provided in the middle inner side of the shell 1, the screening mechanism 5 is used to adjust the screening of coal particles of different sizes, and a drive mechanism 6 is provided at the rear side of the shell 1. The dust handling mechanism 4 includes a pull-out frame 41, which is slidably connected to the front left end of the housing 1. A grid 42 is fixedly connected to the bottom inner side of the pull-out frame 41. A dust filter element 43 is provided inside the pull-out frame 41. A magnetic suction plate 44 is fixedly connected to the front side of the pull-out frame 41. The magnetic suction plate 44 is magnetically connected to the front side of the housing 1. Two low-speed fans 45 are fixedly connected to the left side of the housing 1. The input ends of the two low-speed fans 45 are connected to the top of the pull-out frame 41. Specifically, the pull-out bracket 41 of the dust handling mechanism 4 is slidably connected to the front left end of the outer casing 1, and the inner bottom is fixedly connected to the grille 42, with a dust filter element 43 installed inside; the front side of the pull-out bracket 41 is fixedly connected to the magnetic plate 44, which is magnetically connected to the front side of the outer casing 1; two low-speed fans 45 are fixedly connected to the left side of the outer casing 1, with the input end connected to the top of the pull-out bracket 41. When the low-speed fan 45 starts, it draws air from inside the drawer 41 through the input end, creating a negative pressure inside the drawer 41. The dust-laden air inside the outer casing 1 enters the drawer 41 through the connection between the drawer 41 and the outer casing 1 under the action of the air pressure difference. The air first passes through the grille 42, which blocks larger particles of impurities to prevent them from entering the dust filter element 43. Then the air flows through the dust filter element 43, where the dust is intercepted. The purified air is then discharged by the low-speed fan 45. The magnetic connection between the magnetic plate 44 and the outer shell 1 ensures that the pull-out bracket 41 fits tightly against the outer shell 1 during operation, preventing negative pressure leakage. When dust needs to be cleaned, the pull-out bracket 41 is pulled to separate the magnetic plate 44 from the outer shell 1. After pulling out the pull-out bracket 41, the dust filter element 43 can be replaced or cleaned. The structural strength of the grille 42 can withstand the impact of larger particles. The filtration accuracy of the dust filter element 43 is adapted to the particle size of the dust generated by coal crushing. The air volume of the low-speed fan 45 is matched with the volume of the pull-out bracket 41 to ensure the negative pressure effect. The pull-out bracket 41 provides installation space for the dust treatment components, the grille 42 pre-treats the air, the dust filter element 43 filters the dust, the low-speed fan 45 generates negative pressure, and the magnetic suction plate 44 ensures a seal. The components work together to effectively adsorb and filter the dust inside the outer shell 1 in the coal crushing and screening operation environment, thereby reducing the spread of dust.

[0019] Reference Figure 1 , Figure 2 and Figure 4 The screening mechanism 5 includes a screening plate 51, which is slidably connected to the middle of the front side of the outer shell 1. The top of the screening plate 51 has multiple drop holes 52, and the bottom of the screening plate 51 has multiple adjusting plates 53. The bottom of the front side of the multiple screening plates 51 is rotatably connected to an adjusting screw 54. The multiple adjusting plates 53 are all threadedly connected to the outside of the adjusting screw 54 at equal intervals. The front end of the adjusting screw 54 is fixedly connected to a knob 55. The left and right ends of the front side of the screening plate 51 are each provided with a fixing component 56. The fixing component 56 includes two ear plates 561, which are fixedly connected to the left and right ends of the front side of the screening plate 51 respectively. The upper and lower ends of the front side of the two screening plates 51 are each penetrated by a fixing bolt 562. The ends of the multiple fixing bolts 562 are threadedly connected to the left and right ends of the front side of the outer shell 1 respectively. The fixing component 56 also includes multiple ring handles 563, which are fixedly connected to the front ends of the multiple fixing bolts 562 respectively. The outside of the multiple ring handles 563 is designed to be non-slip. Specifically, the screening plate 51 of the screening mechanism 5 is slidably connected to the middle of the front side of the outer shell 1, with multiple drop-out holes 52 at the top and multiple adjusting plates 53 at the bottom; the bottom of the front side of the screening plate 51 is rotatably connected to the adjusting screw 54, and the multiple adjusting plates 53 are threaded at equal intervals to the outside of the adjusting screw 54, with a knob 55 fixedly connected to the front end of the adjusting screw 54; the left and right ends of the front side of the screening plate 51 are provided with fixing components 56, the two ear plates 561 of the fixing components 56 are fixedly connected to the left and right ends of the front side of the screening plate 51 respectively, and fixing bolts 562 pass through the upper and lower ends of the front side, with the ends of the multiple fixing bolts 562 threadedly connected to the left and right ends of the front side of the outer shell 1 respectively, and annular handles 563 are fixedly connected to the front ends of the fixing bolts 562; Rotating the knob 55 drives the adjusting screw 54 to rotate, and the adjusting plate 53 moves axially along the adjusting screw 54 under the action of the thread, changing the relative position of the adjusting plate 53 and the drop port 52, thereby adjusting the screening gap; the screening plate 51 is fixed to the outer shell 1 by the fixing component 56, and rotating the ring handle 563 causes the fixing bolt 562 to be screwed into the outer shell 1, and the ear plate 561 provides fixed support; coal particles fall on the screening plate 51, particles smaller than the screening gap fall through the drop port 52, and particles larger than the gap continue to remain on the screening plate 51; The rotation direction of knob 55 determines the movement direction of adjusting plate 53, thereby expanding or shrinking the screening gap; the anti-slip design of ring handle 563 facilitates the operator's application of force; the movement distance of adjusting plate 53 is related to the thread pitch of adjusting screw 54; the tightening degree of fixing bolt 562 affects the stability of screening plate 51. The screening plate 51 provides the screening foundation, the adjusting plate 53 and the drop port 52 cooperate to form the screening gap, the adjusting screw 54 and the knob 55 realize the gap adjustment, and the fixing component 56 ensures the stability of the structure. The components work together to achieve the effect of flexibly adjusting the screening particle size and effectively separating coal of different particle sizes in the coal crushing and screening operation environment.

[0020] Reference Figure 1 , Figure 2 and Figure 5 The drive mechanism 6 includes a mounting platform 61, which is fixedly connected to the rear left end of the housing 1. A drive motor 62 is fixedly connected to the top of the mounting platform 61. Drive gears 63 are fixedly connected to the front and rear ends of the two crushing rollers 2. A transmission assembly 64 is provided between the output end of the drive motor 62 and the left crushing roller 2. The transmission assembly 64 includes two gear chains 641, which are fixedly connected to the rear side of the left crushing roller 2 and the output end of the drive motor 62, respectively. Both gear chains 641 are meshed with transmission chains 642 on their outer sides. Specifically, the mounting platform 61 of the drive mechanism 6 is fixedly connected to the rear left end of the housing 1, and the top is fixedly connected to the drive motor 62; the front and rear ends of the two crushing rollers 2 are fixedly connected to drive gears 63, and the front and rear drive gears 63 mesh with each other respectively; a transmission assembly 64 is provided between the output end of the drive motor 62 and the left crushing roller 2, and the two gear chains 641 of the transmission assembly 64 are fixedly connected to the rear side of the left crushing roller 2 and the output end of the drive motor 62 respectively, and the transmission chains 642 are meshed with each other on the outside; After the drive motor 62 starts, the gear chain 641 at its output end begins to rotate. Through the meshing transmission of the transmission chain 642, it drives the gear chain 641 on the rear side of the left crushing roller 2 to rotate synchronously. The left crushing roller 2 rotates with the rotation of the gear chain 641, and the drive gears 63 at its front and rear ends rotate accordingly. Since the drive gears 63 at the front and rear ends mesh with each other, the drive gear 63 of the left crushing roller 2 drives the drive gear 63 of the right crushing roller 2 to rotate in the opposite direction, so that the two crushing rollers 2 form a relative rotational motion. Mounting platform 61 provides stable support for drive motor 62, ensuring its position is fixed during operation; the tooth profile and module of drive gear 63 are matched to ensure the transmission accuracy of the two crushing rollers 2; the meshing depth of gear chain 641 and transmission chain 642 meets the power transmission requirements and avoids slippage during transmission; the output speed of drive motor 62 is adapted to the diameter of crushing roller 2 to ensure that the crushing force meets the operation requirements. Mounting platform 61 carries drive motor 62. Drive motor 62 transmits power to left crushing roller 2 through transmission component 64. Drive gear 63 drives right crushing roller 2 to rotate in the opposite direction, so that the two crushing rollers 2 work together. This achieves the effect of stably driving the two crushing rollers 2 to rotate relative to each other in the coal crushing operation environment, so as to effectively crush the coal.

[0021] Reference Figure 1 and Figure 2 The right side of the outer casing 1 is fixedly connected to a control panel 7, which is electrically connected to two low-speed fans 45 and a drive motor 62 respectively. The top of the inner side of the outer casing 1 adopts an inverted triangle design, and the bottom of the outer casing 1 adopts an anti-slip design. Specifically, the operator sends instructions through the control panel 7 to adjust the airflow of the low-speed fan 45 and the speed of the drive motor 62; the inverted triangular top causes the coal to slide down the inclined plane between the two crushing rollers 2, preventing coal accumulation; the bottom anti-slip design increases the friction between the outer shell 1 and the placement surface, preventing the equipment from shifting due to vibration during operation. The circuit connection of control panel 7 ensures accurate signal transmission; the tilt angle of the inverted triangle is adapted to the coal sliding speed; the texture depth of the anti-slip design matches the weight of the outer shell 1 to ensure placement stability.

[0022] Working principle: The outer shell 1 is the main frame of the equipment. Two crushing rollers 2 are rotatably connected to the top of the inner side, and the collection tray 3 is slidably connected to the bottom of the front side. A dust treatment mechanism 4 is set at the left end of the front side, a screening mechanism 5 is set in the middle of the inner side, and a drive mechanism 6 is set at the rear side. The control panel 7 is fixedly connected to the right side. The top of the inner side of the outer shell 1 adopts an inverted triangle design, and the bottom adopts an anti-slip design. Before the equipment is put into operation, the operator presets the speed of the drive motor 62 and the air volume of the low-speed fan 45 through the control panel 7; the coal to be processed is put into the top of the shell 1, and the inverted triangular design on the inner top guides the coal to slide down the slope between the two crushing rollers 2 to avoid accumulation. In the drive mechanism 6, the mounting platform 61 is fixed to the rear left end of the outer shell 1. The drive motor 62 at the top drives the left crushing roller 2 to rotate through the transmission assembly 64. The gear chain 641 at the output end of the drive motor 62 drives the gear chain 641 on the rear side of the left crushing roller 2 to rotate synchronously through the transmission chain 642. The drive gears 63 at the front and rear ends of the left crushing roller 2 rotate accordingly and mesh with the drive gears 63 at the front and rear ends of the right crushing roller 2, so that the two crushing rollers 2 rotate relative to each other and crush the falling coal. The crushed coal particles fall onto the screening plate 51 of the screening mechanism 5. The screening plate 51 is fixed to the middle of the front side of the outer casing 1 by the ear plate 561 of the fixing component 56 and the fixing bolt 562. The drop port 52 at the top and the adjusting plate 53 at the bottom form a screening gap. The operator can turn the knob 55 to move the adjusting plate 53 through the adjusting screw 54 to change the size of the screening gap and adapt to the screening requirements of different particle sizes. Particles smaller than the gap fall into the collection tray 3 through the drop port 52, while particles larger than the gap remain on the screening plate 51, thus completing the screening. The dust generated during the crushing and screening process is handled by the dust treatment mechanism 4; the two low-speed fans 45 on the left side of the outer shell 1 are started, and the air inside the drawer frame 41 is drawn through the input end to form a negative pressure; the dust-laden air inside the outer shell 1 enters the drawer frame 41 through the connecting part, first passes through the grid 42 to block large particles of impurities, and then passes through the dust filter element 43 to filter the dust. The purified air is discharged by the low-speed fans 45; the magnetic plate 44 on the front side of the drawer frame 41 is magnetically connected to the outer shell 1 to ensure a seal and prevent negative pressure leakage; After the operation is completed, turn off the control panel 7 and stop the drive motor 62 and low-speed fan 45; pull out the collection tray 3 at the bottom front of the outer casing 1 and take out the screened coal particles; pull the pull-out bracket 41 of the dust treatment mechanism 4 to separate the magnetic suction plate 44 from the outer casing 1, and clean or replace the dust filter element 43 after pulling it out; if it is necessary to adjust the screening specifications, rotate the ring handle 563 to loosen the fixing bolt 562, slide the screening plate 51 to the appropriate position and then fix it again, and then adjust the screening gap by using the knob 55. The anti-slip design on the bottom of the outer casing 1 increases friction with the placement surface, preventing the equipment from shifting due to vibration during operation; the electrical connection between the control panel 7 and the drive motor 62 and low-speed fan 45 ensures precise control of operating parameters; the various mechanisms work together to achieve continuous coal crushing, grading and screening, dust purification and collection in coal processing scenarios.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A coal crushing and screening processing device, comprising a shell (1), characterized in that: Two crushing rollers (2) are rotatably connected to the top inner side of the outer shell (1). A collection tray (3) is slidably connected to the bottom front side of the outer shell (1). A dust treatment mechanism (4) is provided at the left front end of the outer shell (1). The dust treatment mechanism (4) is used to generate negative pressure inside the outer shell (1) and adsorb some dust. A screening mechanism (5) is provided in the middle inner side of the outer shell (1). The screening mechanism (5) is used to adjust the screening of coal particles of different sizes. A driving mechanism (6) is provided at the rear side of the outer shell (1). The dust handling mechanism (4) includes a pull-out frame (41), which is slidably connected to the front left end of the outer shell (1). A grid (42) is fixedly connected to the bottom inner side of the pull-out frame (41). A dust filter element (43) is provided inside the pull-out frame (41). A magnetic suction plate (44) is fixedly connected to the front side of the pull-out frame (41). The magnetic suction plate (44) is magnetically connected to the front side of the outer shell (1). Two low-speed fans (45) are fixedly connected to the left side of the outer shell (1). The input ends of the two low-speed fans (45) are connected to the top of the pull-out frame (41).

2. The coal crushing and screening equipment according to claim 1, characterized in that: The screening mechanism (5) includes a screening plate (51), which is slidably connected to the middle of the front side of the outer shell (1). The top of the screening plate (51) is provided with multiple drop holes (52), and the bottom of the screening plate (51) is provided with multiple adjusting plates (53). The bottom of the front side of the multiple screening plates (51) is rotatably connected with adjusting screws (54). The multiple adjusting plates (53) are all threadedly connected to the outside of the adjusting screws (54) at equal intervals. The front end of the adjusting screws (54) is fixedly connected with a knob (55). The left and right ends of the front side of the screening plate (51) are provided with fixing components (56).

3. The coal crushing and screening equipment according to claim 1, characterized in that: The drive mechanism (6) includes a mounting platform (61), which is fixedly connected to the rear left end of the housing (1). A drive motor (62) is fixedly connected to the top of the mounting platform (61). Drive gears (63) are fixedly connected to the front and rear ends of the two crushing rollers (2). A transmission assembly (64) is provided between the output end of the drive motor (62) and the left crushing roller (2).

4. The coal crushing and screening equipment according to claim 2, characterized in that: The fixing component (56) includes two ear plates (561), which are fixedly connected to the left and right ends of the front side of the screening plate (51) respectively. The upper and lower ends of the front side of the two screening plates (51) are each connected to a fixing bolt (562), and the ends of the fixing bolts (562) are threaded to the left and right ends of the front side of the outer shell (1) respectively.

5. The coal crushing and screening equipment according to claim 3, characterized in that: The transmission assembly (64) includes two gear chains (641), which are respectively fixedly connected to the outer rear side of the left crushing roller (2) and the output end of the drive motor (62). Both gear chains (641) are meshed with transmission chains (642) on their outer sides.

6. The coal crushing and screening equipment according to claim 4, characterized in that: The fixing component (56) also includes a plurality of ring handles (563), which are respectively fixedly connected to the front end of a plurality of fixing bolts (562), and the exterior of the plurality of ring handles (563) is designed to be non-slip.

7. The coal crushing and screening equipment according to claim 1, characterized in that: A control panel (7) is fixedly connected to the right side of the outer casing (1). The control panel (7) is electrically connected to two low-speed fans (45) and a drive motor (62) respectively.

8. The coal crushing and screening equipment according to claim 1, characterized in that: The top inner side of the outer shell (1) adopts an inverted triangle design, and the bottom of the outer shell (1) adopts an anti-slip design.

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