Coal ball pressing device

Abstract

The invention belongs to the technical field of coal processing, and particularly relates to a coal ball pressing device which comprises a rack and two pressing rollers on one side of the rack, a coal ball anti-sticking mechanism is arranged in an inner cavity of each pressing roller, and each coal ball anti-sticking mechanism comprises a plurality of mold cavities formed in the peripheral wall of the corresponding pressing roller. A finished briquette manufacturing area is arranged between the two pressing rollers, cams with the same number as the pressing rollers are installed on one side of the rack, the protruding positions of the cams right face the sides, away from each other, of the two pressing rollers, a plurality of abutting columns abutting against the cams are slidably connected to the inner circumferential walls of the pressing rollers, and an inner cavity of each mold cavity is slidably connected with a pushing plate fixedly connected with the abutting columns. The technical means that the cam is matched with the pressing roller is adopted, movement of the pushing plate is achieved through rotation of the pressing roller, the pushing plate can stretch out when the die cavity rotates to a defective coal briquette discharging area, and therefore defective coal briquettes adhering to the interior of the die cavity can be conveniently ejected out.

Description

Technical Field

[0001] The invention belongs to the technical field of coal processing, in particular to a coal briquetting device. Background Art

[0002] Coal briquetting is a process for converting powdered coal into balls of a certain strength and particle size to improve combustion efficiency, facilitate storage and transportation, meet industrial needs, and reduce pollution. A coal briquetting device is generally used to process coal.

[0003] To overcome the problem of a high proportion of fines during the briquetting process, often caused by factors such as coal's inherent physical properties (hardness, brittleness, and cracks), as well as improper crushing and transportation techniques, mismatched briquetting parameters, and unbalanced moisture control, a vibrating feeder can be added to the feed inlet. This device uses high-frequency vibration to promote uniform mixing of fines and coarse particles, optimizing material filling and reducing the risk of mold cavity sticking caused by localized accumulation of fines, thereby improving the stability and efficiency of the briquetting process.

[0004] However, the high-frequency vibration of the vibrating feeding device may cause some of the fine powder to be further broken into finer powder (such as an increase in the proportion of particles <0.075mm), resulting in an increase in the proportion of fine powder instead of a decrease, exacerbating the recurrence of the problem of defective coal balls sticking to the mold. Summary of the Invention

[0005] The purpose of the present invention is to provide a coal briquetting device to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a coal briquetting device, comprising a frame and two pressing rollers on one side of the frame, the two pressing rollers are driven by independent servo motors respectively, the inner cavity of each pressing roller is provided with a coal ball anti-sticking mechanism, the coal ball anti-sticking mechanism comprises a plurality of mold cavities opened on the outer peripheral wall of the pressing roller, and the area between the two pressing rollers is a finished coal ball production area, one side of the frame is equipped with cams with the same number of pressing rollers, and the protrusion thereof is facing the side where the two pressing rollers are away from each other, the inner peripheral wall of the pressing roller is slidably connected with a plurality of abutment columns abutting the cam, and the inner cavity of each mold cavity is slidably connected with a push plate fixedly connected to the abutment column.

[0007] Preferably, the inner peripheral wall of each of the pressing rollers is fixedly connected with a connection box having the same number as the mold cavities, and the abutment column is slidably connected to the inner cavity of the connection box.

[0008] Preferably, a support spring is fixedly connected to the inner wall of the connection box, and the support spring is fixedly connected to the support column.

[0009] Preferably, the push plate fits the outer shape of the inner wall of the mold cavity.

[0010] Preferably, an arc-shaped guide plate for guiding the discharge of defective coal balls is installed on one side of the frame.

[0011] Preferably, a collection box cooperating with the arc-shaped guide plate is also installed on one side of the frame.

[0012] Preferably, the coal ball anti-sticking mechanism includes a plurality of grooves opened on the outer peripheral wall of the pressing roller, and the inner cavity of each groove is installed with a mold, the inner cavity of the mold is provided with a mold groove, and a micropore group is provided on the side away from the mold groove. The inner cavity of the mold is also slidably connected with a sealing part for sealing the micropore group. The area between the two pressing rollers is the finished coal ball production area, and one side of the frame is provided with a concave wheel with the same number of pressing rollers, and the direction of the concave wheel is facing the side where the two pressing rollers are away from each other. The inner peripheral wall of each pressing roller is slidably connected with a plurality of arc rods, and the arc rods are fixedly connected to the sealing part. The rotating concave wheel causes the arc rods to rotate synchronously, and the sealing part is driven away from the micropore group when the arc rod enters the concave wheel's concave wheel groove.

[0013] Preferably, the inner circumferential wall of the pressure roller is fixedly connected to an outer sleeve, the arc rod is slidably connected to the inner cavity of the outer sleeve, the inner wall of the outer sleeve is fixedly connected to an extrusion spring, and the extrusion spring is fixedly connected to the arc rod.

[0014] Preferably, a trigger switch is installed at the notch of the cam, and a fan is fixedly installed on one side of the frame. The trigger switch is electrically connected to the fan, and the power supply of the fan is connected when the arc rod and the trigger switch are in contact, and the power supply of the fan is disconnected when the arc rod and the trigger switch are in non-contact state.

[0015] Preferably, an air supply channel is provided on the inner peripheral wall of each of the pressure rollers, and an air supply nozzle matching the air supply channel is installed at the air outlet end of the blower.

[0016] The beneficial effects of the present invention are as follows: 1. The present invention adopts the technical means of cooperating with a cam and a pressure roller. The movement of the push plate is realized by utilizing the rotation of the pressure roller. When the mold cavity rotates to the unloading area of ​​defective coal balls, the push plate will extend, thereby facilitating the ejection of defective coal balls adhering to the mold cavity, thereby facilitating the improvement of the problem of defective coal balls sticking to the mold in the equipment and making it convenient for workers to use.

[0017] 2. The present invention adopts a technical means of cooperating with a concave wheel and a fan. The concave wheel can convert the rotational motion of the pressure roller into the periodic opening and closing of the microporous group, realizing functional switching in the two stages of pressing and demolding. When the equipment is sticking to the mold, opening the microporous group can enable the defective coal balls to be discharged in a non-contact manner to avoid their deformation. At the same time, the fan is used to accelerate the discharge, which not only facilitates further improvement of the problem of defective coal balls sticking to the mold in the equipment, but also avoids the deformation of the coal balls, thereby enabling the equipment to better and more stably achieve the separation of the coal balls.

[0018] 3. The present invention adopts a technical means of coordinating pressure rollers and arc-shaped guide plates. By dividing the different positions of the pressure rollers into areas, that is, the area between the two pressure rollers is the finished coal ball production area, and the side away from each other is the defective coal ball unloading area. By dividing them into zones and coordinating with the arc-shaped guide plates, it is convenient to separate the finished coal balls from the defective coal balls, which not only ensures the quality of the finished coal balls, but also reduces the burden on workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the overall structure of the first embodiment of the present invention; Figure 2 It is a side structural schematic diagram of the present invention; Figure 3 This is a schematic structural diagram of the present invention for showing the pressing roller; Figure 4 This is a cross-sectional view of the present invention for showing the internal structure of the pressure roller; Figure 5 Schematic diagram of the overall structure of the second embodiment of the present invention; Figure 6 For the present invention Figure 5 A partial enlarged view of point A shown; Figure 7 For the present invention Figure 5 A cross-sectional view of the internal structure of the pressure roller shown; Figure 8 For the present invention Figure 7 A partial enlarged view of point B is shown.

[0020] In the picture: 1. Frame; 2. Round plate; 3. Pressing roller; 31. Groove; 32. Concave wheel; 33. Outer sleeve; 34. Curved rod; 35. Extrusion spring; 36. Linkage rod; 37. Die; 38. Micropore group; 39. Sliding groove; 310. Blocking; 312. Fan; 313. Air supply nozzle; 314. Trigger switch; 4. Feed hopper; 5. Curved guide plate; 6. Collection box; 7. Conveyor belt; 8. Cam; 81. Connecting box; 82. Column; 83. Support spring; 84. Synchronous rod; 85. Push plate; 9. Mold cavity. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0022] like Figures 1 to 4 As shown, an embodiment of the present invention provides a coal briquetting device, including a frame 1, on which a feed hopper 4 is installed. The feed hopper 4 is designed in an inverted trapezoidal shape, and its structure of being wide at the top and narrow at the bottom is convenient for the centralized introduction of coal raw materials. Its inner wall is made of wear-resistant stainless steel and is provided with an anti-stick coating to prevent fine coal powder from accumulating and adhering to the inner wall of the feed hopper 4. Two pressure rollers 3 are rotatably connected to one side of the frame 1, and the two pressure rollers 3 rotate in opposite directions. The pressure rollers 3 are forged from alloy steel, and the surface is quenched to have a certain hardness and wear resistance.

[0023] The two pressing rollers 3 are driven by independent servo motors respectively, and both servo motors are fixedly connected to the frame 1. The speed and torque of each pressing roller 3 can be adjusted individually to meet the requirements of different working conditions (such as coal particle size and hardness differences). The servo motor realizes stepless adjustment of speed (0-rated speed) and torque through the frequency converter.

[0024] The spacing between the rollers 3 can be fine-tuned using a hydraulic adjustment device to ensure the appropriate pressure is applied to the coal material, allowing the coal to be fully compacted and formed within the mold cavity 9. A conveyor belt 7 for receiving the coal briquettes is located below the frame 1. The conveyor belt 7 is made of wear-resistant rubber with a non-slip surface, ensuring stable conveyance of the formed coal briquettes. Protective baffles are installed on both sides of the conveyor belt 7 to prevent the coal briquettes from rolling off during transportation.

[0025] The area between the two pressing rollers 3 is the finished coal ball production area, and the side away from each other is the defective coal ball unloading area. By dividing the areas at different positions of the pressing rollers 3, it is convenient to carry out zoning processing of the finished coal balls. By processing them, the burden on workers is reduced and it is convenient to use.

[0026] One side of the frame 1 is also provided with a briquette anti-sticking mechanism, which includes a cam 8 fixedly mounted at the center of one side of the circular plate 2. The protrusion of the cam 8 is facing the defective briquette unloading area. The outer peripheral wall of each pressing roller 3 is provided with a number of mold cavities 9, and the inner peripheral wall of each pressing roller 3 is fixedly connected with a connecting box 81 with the same number of mold cavities 9. The inner cavity of the connecting box 81 is slidably connected with a post 82 abutting against the cam 8. The inner wall of the connecting box 81 is fixedly connected with a support spring 83. The side of the support spring 83 away from the inner wall of the connecting box 81 is in contact with the post 8. 2 is fixedly connected. The support spring 83 is used to provide an outward thrust for the support column 82 to ensure that the support column 82 always fits the outer peripheral wall of the cam 8. A synchronization rod 84 is fixedly connected to one side of the support column 82 and located in the inner cavity of the connecting box 81. One end of the synchronization rod 84 passes through the pressure roller 3 and extends to the inner cavity of the pressure roller 3. The end of the synchronization rod 84 extending to the pressure roller 3 is fixedly connected to a push plate 85 that fits the outer shape of the inner wall of the mold cavity 9. The push plate 85 fits precisely with the inner wall of the mold cavity 9 to avoid scratching the coal balls, while ensuring that the ejection force is evenly distributed and reducing the breakage rate of the coal balls.

[0027] More specifically, due to the non-circular design of the profile of the cam 8, the buttress 82 will produce radial telescopic movement due to the squeezing of the cam 8 during the rotation process.

[0028] In the finished coal ball production area (between the two pressing rollers 3): the support column 82 is in the non-raised part of the cam 8, the support spring 83 pushes the support column 82 outward, and the push plate 85 retracts to the bottom of the mold cavity 9. At this time, the mold cavity 9 is filled with coal and pressed, and the push plate 85 does not interfere with the molding process.

[0029] In the unloading area of ​​defective coal balls (the side where the two pressure rollers 3 are away from each other): the support column 82 contacts the protrusion of the cam 8, is squeezed inward, and pushes the push plate 85 out of the mold cavity 9 through the synchronization rod 84. At this time, the push plate 85 will push the defective coal balls out of the mold cavity 9.

[0030] Two arc-shaped guide plates 5 are fixedly installed on one side of the frame 1 and below the two pressure rollers 3. The arrangement of the arc-shaped guide plates 5 not only facilitates the guidance of defective coal balls, but also facilitates the collection of defective coal balls. A collection box 6 that cooperates with the arc-shaped guide plates 5 is also fixedly installed on one side of the frame 1.

[0031] Working principle: Before using the equipment, conduct a comprehensive inspection on it. After the inspection is correct, put the coal raw material between the two pressing rollers 3 through the feed hopper 4. By driving the servo motor to rotate the two pressing rollers 3 towards each other, the coal raw material is squeezed into the mold cavity 9 on the outer wall of the pressing roller 3 under the action of pressure. The raw material is squeezed into the coal ball blank in the mold cavity 9. As the pressing roller 3 continues to rotate, the mold cavities 9 in the two pressing rollers 3 are gradually aligned, so that high pressure can be applied to the coal material, making the coal ball blank densely formed.

[0032] By dividing the different positions of the pressure roller 3 into areas (the area between the two pressure rollers 3 is the finished coal ball production area, and the side away from each other is the defective coal ball unloading area), the pressure roller 3 is rotated to drive several anti-pillars 82 to rotate synchronously. Since the protrusion of the cam 8 is facing the defective coal ball unloading area, when the non-protrusion part of the cam 8 contacts the anti-pillar 82, the anti-pillar 82 is in an extended state under the action of the support spring 83. When the protrusion of the cam 8 squeezes the anti-pillar 82, it can overcome the elastic force of the support spring 83 to make it slide inward. The sliding of the anti-pillar 82 drives the push plate 85 to extend outward, thereby ejecting the defective products from the mold cavity 9. The arrangement of the arc-shaped guide plate 5 facilitates guiding the remaining defective coal balls to the inner cavity of the collection box 6, and the finished coal balls will fall onto the conveyor belt 7, thereby realizing the partitioned unloading of defective coal balls and finished coal balls, and finally the finished coal balls are conveniently transported through the conveyor belt 7. Example

[0033] like Figures 5 to 8 As shown, on the basis of Example 1, the present invention also provides another implementation of the coal ball anti-sticking mechanism, which is specifically as follows: the coal ball anti-sticking mechanism includes a circular plate 2 fixedly connected to one side of the frame 1, and the center of one side of the frame 1 is rotatably connected to a rotating shaft fixedly connected to the pressure roller 3, and a concave wheel 32 is fixedly installed at the center of the circular plate 2, and the concave wheel 32 is rotatably connected to the rotating shaft. The concave wheel 32 is concentric with the rotating shaft of the pressure roller 3 but does not rotate with the shaft, and its contour is non-circular (such as an elliptical shape), and a plurality of outer sleeves 33 are fixedly connected to the inner circumferential wall of the pressure roller 3, and the side of the outer sleeve 33 away from the inner circumferential wall of the pressure roller 3 is slidably connected to an arc rod 34 abutting against the concave wheel 32, and the inner wall of the outer sleeve 33 is fixedly connected to an extrusion spring 35, and the side of the extrusion spring 35 away from the inner wall of the outer sleeve 33 is fixedly connected to the arc rod 34, and the extrusion spring 35 is used to provide a buffer for the arc rod 34 to avoid damage to the arc rod 34 due to rigid collision, thereby facilitating the extension of the service life of the arc rod 34.

[0034] One end of the arc rod 34 is fixedly connected to the inner cavity of the outer sleeve 33 with a linkage rod 36. The outer peripheral wall of each pressure roller 3 is equidistantly provided with grooves 31 with the same number as the outer sleeve 33. The inner wall of the groove 31 is fixedly connected to a mold 37. The inner cavity of the mold 37 is provided with a mold groove, which is used to form coal balls. The inner cavity of the mold 37 and the side away from the mold groove are provided with a micropore group 38 (the micropore group 38 is composed of a plurality of evenly distributed through holes, and the diameter of the micropores is usually designed to be 0.5-1mm, so as to ensure the air jet effect while preventing coal powder from being blocked). The inner cavity of each pressure roller 3 is also provided with a sliding groove 39. The inner cavity of the sliding groove 39 is slidably connected with a sealing member 310 for sealing the micropore group 38. The sealing member 310 is fixedly connected to the linkage rod 36.

[0035] To be more specific, the elastic force of the extrusion spring 35 can ensure that the arc rod 34 always keeps in contact with the concave wheel 32, and facilitates the synchronous resetting of the sealing member 310. When the mold 37 leaves the finished coal ball production area, the arc rod 34 is squeezed by the concave wheel 32 again, and the sealing member 310 closes the micropore group 38 again, thereby preparing for the next cycle of pressing.

[0036] Furthermore, in the finished coal ball production area (between the two pressing rollers 3): the arc rod 34 is at the distal end of the concave wheel 32, and the arc rod 34 is squeezed inward and contracts, and the blocking piece 310 is pulled by the linkage rod 36 to block the micropore group 38. At this time, the coal material in the mold groove is suppressed and sealed by the micropore group 38 to prevent the material from entering.

[0037] In the unloading area of ​​defective coal balls (the side where the two pressure rollers 3 are away from each other): the arc rod 34 enters the notch (proximal end) of the concave wheel 32, and extends outward under the action of the extrusion spring 35, pushing the blocking member 310 away from the micropore group 38 through the linkage rod 36. At this time, the micropore group 38 is opened. The opening of the micropore group 38 facilitates the unloading of defective coal balls in a non-contact manner, thereby reducing mold sticking of the equipment.

[0038] A trigger switch 314 is installed at the recess of the concave wheel 32, and a fan 312 is fixedly installed on one side of the circular plate 2. The trigger switch 314 is electrically connected to the fan 312. When the arc rod 34 and the trigger switch 314 are in contact, the power supply of the fan 312 is connected, and when the arc rod 34 and the trigger switch 314 are in non-contact state, the power supply of the fan 312 is disconnected. The position of the micropore group 38 corresponds to the mold groove one by one, and the pore size and distribution are optimized, so as to ensure that the air ejected by the fan 312 acts evenly on the surface of the coal ball, thereby avoiding the damage of the coal ball caused by local uneven pressure.

[0039] An air supply channel 311 is formed on the inner wall of each pressing roller 3 . The air supply channel 311 is communicated with the inner cavity of the sliding groove 39 . An air supply nozzle 313 matching the air supply channel 311 is installed at the air outlet end of the fan 312 .

[0040] More specifically, by ensuring that the notch of the concave wheel 32 is positioned in strict correspondence with the lower area of ​​the defective briquettes, it is ensured that air is only injected during the demoulding stage, thereby avoiding air leakage during pressing that affects the molding effect.

[0041] Working principle: Before using the equipment, conduct a comprehensive inspection on it. After the inspection is correct, put the coal raw material between the two pressing rollers 3 through the feed hopper 4. By driving the servo motor to rotate the two pressing rollers 3 towards each other, the coal raw material is squeezed into the die groove of the mold 37 on the outer wall of the pressing roller 3 under the action of pressure. The raw material is squeezed into the coal ball blank in the die groove. As the pressing roller 3 continues to rotate, the die grooves in the two pressing rollers 3 are gradually aligned, so that high pressure can be applied to the coal material, making the coal ball blank densely formed.

[0042] By dividing the different positions of the pressure roller 3 into areas (the area between the two pressure rollers 3 is the finished coal ball production area, and the side away from each other is the defective coal ball unloading area), the pressure roller 3 is rotated to drive several arc rods 34 to rotate synchronously. When the arc rod 34 enters the recess of the concave wheel 32, the fixed shape of the concave wheel 32 is used to force the arc rod 34 to shrink inward. When the arc rod 34 shrinks inward, it drives the sealing member 310 away from the micropore group 38. The arrangement of the arc guide plate 5 facilitates guiding the remaining defective coal balls to the inner cavity of the collection box 6, and the finished coal balls will fall onto the conveyor belt 7, thereby realizing the partitioned unloading of defective coal balls and finished coal balls, and finally the finished coal balls are conveniently transported through the conveyor belt 7.

[0043] At the same time, the arc rod 34 contacts the trigger switch 314. When the arc rod 34 and the trigger switch 314 are in contact, the power of the fan 312 will be turned on. The external air source is driven by the air nozzle 313 to enter the mold cavity of the mold 37. The air can be sprayed into the mold cavity through the micropore group 38, and the formed coal balls are pushed out of the mold cavity by air pressure to avoid adhesion and complete demolding at the same time.

[0044] Compared with Example 1, this embodiment adopts the technical means of cooperating with a concave wheel and a fan. The concave wheel can convert the rotational motion of the pressure roller into the periodic opening and closing of the micropore group, realizing function switching in the two stages of pressing and demolding. When the equipment is sticking to the mold, opening the micropore group can enable the defective coal balls to be discharged in a non-contact manner to avoid their deformation. At the same time, the discharge is accelerated with the help of the fan, which not only facilitates further improvement of the problem of defective coal balls sticking to the mold in the equipment, but also avoids the deformation of the coal balls, thereby enabling the equipment to better and more stably achieve the separation of the coal balls.

[0045] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0046] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A coal briquetting device, comprising a frame (1) and two pressing rollers (3) on one side thereof, wherein the two pressing rollers (3) are driven by independent servo motors, and characterized in that: The inner cavity of each of the pressing rollers (3) is provided with a coal ball anti-sticking mechanism, and the coal ball anti-sticking mechanism includes a plurality of mold cavities (9) opened on the outer peripheral wall of the pressing roller (3). The area between the two pressing rollers (3) is a finished coal ball production area. One side of the frame (1) is provided with cams (8) with the same number as the pressing rollers (3), and the protrusions thereof are directly opposite to the sides of the two pressing rollers (3) away from each other. The inner peripheral wall of the pressing roller (3) is slidably connected to a plurality of abutting columns (82) abutting against the cams (8), and the inner cavity of each of the mold cavities (9) is slidably connected to a push plate (85) fixedly connected to the abutting columns (82).

2. The coal briquetting device according to claim 1, characterized in that: The inner peripheral wall of each pressing roller (3) is fixedly connected to a connection box (81) whose number matches the mold cavity (9), and the support column (82) is slidably connected to the inner cavity of the connection box (81).

3. The coal briquetting device according to claim 2, characterized in that: A support spring (83) is fixedly connected to the inner wall of the connection box (81), and the support spring (83) is fixedly connected to the support column (82).

4. The coal briquetting device according to claim 3, characterized in that: The push plate (85) fits the outer shape of the inner wall of the mold cavity (9).

5. The coal briquetting device according to claim 1, characterized in that: An arc-shaped guide plate (5) for guiding the discharge of defective coal briquettes is installed on one side of the frame (1).

6. The coal briquetting device according to claim 5, characterized in that: A collecting box (6) that matches the arc-shaped guide plate (5) is also installed on one side of the frame (1).

7. The coal briquetting device according to claim 1, characterized in that: The briquette anti-sticking mechanism comprises a plurality of grooves (31) provided on the outer peripheral wall of the pressing roller (3), the inner cavity of each groove (31) is provided with a mold (37), the inner cavity of the mold (37) is provided with a mold groove, and a micropore group (38) is provided on the side away from the mold groove, and the inner cavity of the mold (37) is also slidably connected with a blocking member (310) for blocking the micropore group (38), the area between the two pressing rollers (3) is the finished briquette production area, and the frame (1) is provided with a mold groove. One side is provided with a concave wheel (32) having the same number as the pressure rollers (3), and the direction of the concave wheel (32) is facing the side where the two pressure rollers (3) are away from each other. The inner peripheral wall of each pressure roller (3) is slidably connected to a plurality of arc-shaped rods (34), and the arc-shaped rods (34) are fixedly connected to the blocking member (310). The rotating concave wheel (32) causes the arc-shaped rods (34) to rotate synchronously, and when the arc-shaped rods (34) enter the concave wheel (32) concave groove, the blocking member (310) is driven away from the micropore group (38).

8. The coal briquetting device according to claim 7, characterized in that: The inner peripheral wall of the pressure roller (3) is fixedly connected to an outer sleeve (33), the arc rod (34) is slidably connected to the inner cavity of the outer sleeve (33), the inner wall of the outer sleeve (33) is fixedly connected to an extrusion spring (35), and the extrusion spring (35) is fixedly connected to the arc rod (34).

9. The coal briquetting device according to claim 8, characterized in that: A trigger switch (314) is installed at the notch of the cam wheel (32), and a fan (312) is fixedly installed on one side of the frame (1). The trigger switch (314) is electrically connected to the fan (312). When the arc rod (34) and the trigger switch (314) are in a contact state, the power supply of the fan (312) is connected, and when the arc rod (34) and the trigger switch (314) are in a non-contact state, the power supply of the fan (312) is disconnected.

10. The coal briquetting device according to claim 9, characterized in that: An air supply channel (311) is provided on the inner peripheral wall of each pressure roller (3), and an air supply nozzle (313) matching the air supply channel (311) is installed at the air outlet end of the fan (312).

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