Feeding device of coal mill

Abstract

The invention discloses a feeding device of a coal mill. The feeding device comprises a feeding bin, and an opening is formed in the side wall of the feeding bin; the sieve plate is obliquely arranged in the feeding bin; the crushing part comprises a collecting bin connected with the opening of the feeding bin, a crushing roller is rotationally arranged in the collecting bin, and a guide plate is further arranged on the outer wall of the crushing roller; a crushing table is arranged below the crushing rollers; a first power unit is arranged on one side of the collecting bin, and a material returning pipe is arranged between the collecting bin and the feeding bin; the transmission part is arranged between the crushing roller and the sieve plate; according to the coal crushing device, the sieve plate intercepts large-particle-size coal and conveys the coal into the collecting bin, the first power unit drives the crushing roller to rotate and guides the coal to move in the direction of the material returning pipe, and due to the fact that the gap between the crushing table and the crushing roller is gradually reduced, the coal is extruded between the crushing table and the crushing roller till the coal is crushed; and the crushed coal is conveyed into the feeding bin through the material returning pipe, so that the blockage probability of the feeding bin is reduced, and the quality and efficiency of the subsequent coal grinding procedure are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mills, and particularly to a coal feeding device for a coal mill. Background Art

[0002] A coal mill is an important device that grinds raw coal to reduce the size of coal particles and increase their surface area, thereby improving the combustion efficiency of coal materials. It is commonly used in fields such as the power industry and the metallurgical industry.

[0003] When actually feeding coal into the coal mill, due to the uneven size of coal materials, the coal materials are prone to blockage during the transportation to the coal mill. Moreover, when coal materials with a large difference in particle size are ground in the coal mill, the problem of insufficient grinding of coal materials easily occurs, resulting in some pulverized coal particles not meeting the requirements and affecting quality and efficiency.

[0004] Therefore, a coal feeding device for a coal mill that can break large - sized coal materials is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to address the above - mentioned deficiencies and provide a coal feeding device for a coal mill that can break large - sized coal materials and avoid blockage.

[0006] To solve the above - mentioned technical problems, the present invention adopts the following technical solutions: A coal feeding device for a coal mill includes a feeding bin, and an opening is provided on its side wall;

[0007] A sieve plate is inclined and movably connected to the inside of the feeding bin. Multiple sieve holes are distributed on the plate surface to form a coal material sorting surface, and the bottom end of its inclined surface extends to the opening of the feeding bin;

[0008] A crushing component includes a collection bin connected to the opening of the feeding bin, which is used to receive the coal materials screened by the sieve plate. A crushing roller is rotatably arranged in the collection bin and is conically arranged with its conical head end corresponding to the bottom end direction of the inclined surface of the sieve plate for crushing coal materials. A guiding plate for guiding the coal materials to move towards the conical tail end direction is spirally arranged on the outer wall of the crushing roller;

[0009] A crushing table is provided on the inner wall of the bin body below the crushing roller, and its working surface forms a gradually shrinking crushing cavity with the conical surface of the crushing roller, and the distance decreases along the direction from the conical head to the conical tail;

[0010] A first power unit for driving the crushing roller to rotate is provided on one side of the collection bin, and a return pipe for transporting the crushed coal materials into the feeding bin is provided between the collection bin and the feeding bin;

[0011] A transmission component is arranged between the crushing roller and the sieve plate, and the crushing roller drives the sieve plate to vibrate in the feeding bin through the transmission component.

[0012] Further, the crushing table is slidably arranged in the collecting bin along the axial direction of the crushing roller, and a pushing member for driving it to slide towards the tapered end is provided between the crushing table and the crushing roller.

[0013] Further, a guiding groove parallel to the axial direction of the crushing table and a communicating adjusting bin are provided on the side wall of the collecting bin;

[0014] The pushing member includes a positioning sleeve slidably arranged in the guiding groove, and an abutting rod axially slidable is inserted in the positioning sleeve. One end of the abutting rod close to the crushing roller extends to form a contact fit with the guiding plate;

[0015] A first magnetic attraction unit is provided at one end of the abutting rod away from the guiding plate, and a second magnetic attraction unit attracting it is provided at the corresponding position of the collecting bin. A first elastic unit for applying an elastic force to the abutting rod in the direction towards the crushing roller is provided between the positioning sleeve and the abutting rod;

[0016] A reset assembly is further included between the crushing table and the collecting bin, which is used to apply a pulling force to the crushing table in the direction close to the sieve plate.

[0017] Further, the reset assembly includes a second elastic unit between the crushing table and the collecting bin, which is used to provide a pulling force to the crushing table in the direction close to the sieve plate.

[0018] Further, a sliding groove extending along the direction of the guiding groove is formed in the adjusting bin;

[0019] A guiding member is provided in the adjusting bin, including a first abutting block vertically and slidably inserted at one end of the abutting rod close to the adjusting bin. A second abutting block for pressing down the first abutting block is provided at one end of the sliding groove away from the second magnetic attraction unit;

[0020] A third elastic unit for applying a vertically upward elastic force to the first abutting block is further provided between the first abutting block and the abutting rod.

[0021] Further, the transmission member includes a third abutting block arranged at the bottom of the inclined end of the sieve plate, and a connecting disc arranged at the conical top of the crushing roller. A fourth abutting block for top-pushing cooperation with the third abutting block is provided on the connecting disc.

[0022] Further, a coal material pushing plate is provided at the end of the crushing table close to the return pipe end, and a guiding plate for guiding the coal material into the return pipe is further provided at the joint of the collecting bin and the return pipe.

[0023] The beneficial effects of the present invention are embodied in:

[0024] In the present invention, in the cooperation between the sieve plate and the crushing component, the sieve plate intercepts large-sized coal materials and conveys them into the collection bin. At this time, the first power unit drives the crushing roller to rotate and guides the coal materials to move towards the return pipe. During the movement of the coal materials, since the gap between the crushing table and the crushing roller gradually decreases, the coal materials are thus squeezed between the crushing table and the crushing roller until the coal materials are crushed. The crushed coal materials are conveyed into the feed bin through the return pipe, reducing the probability of blockage in the feed bin and ensuring the quality and efficiency of the subsequent coal grinding process. Brief Description of the Drawings

[0025] Figure 1 is a three-dimensional view of the coal feeder device for the coal mill according to the present invention;

[0026] Figure 2 is a first cross-sectional view of the coal feeder device for the coal mill according to the present invention;

[0027] Figure 3 is a second cross-sectional view of the coal feeder device for the coal mill according to the present invention;

[0028] Figure 4 is Figure 3 an enlarged view of part A in

[0029] Figure 5 is a third cross-sectional view of the coal feeder device for the coal mill according to the present invention;

[0030] Figure 6 is Figure 5 an enlarged view of part B in

[0031] In the figure:

[0032] 1. Feed bin; 2. Sieve plate; 3. Crushing component; 31. Collection bin; 311. Guide groove; 312. Adjustment bin; 313. Slide groove; 32. Crushing roller; 33. Guide plate; 34. Crushing table; 35. First power unit; 4. Return pipe; 5. Transmission component; 51. Third abutting block; 52. Connecting plate; 53. Fourth abutting block; 6. Pushing component; 61. Positioning sleeve; 62. Abutting rod; 63. First magnetic attraction unit; 64. Second magnetic attraction unit; 65. First elastic unit; 66. Second elastic unit; 7. Guiding component; 71. First abutting block; 72. Second abutting block; 73. Third elastic unit; 8. Aggregating component; 81. Pushing plate; 82. Guide plate; 9. Baffle. Detailed Embodiment

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1-6 , the present invention discloses a coal feeder for a coal mill, including: a feed bin 1, having an opening on its side wall, and its discharge port end is connected to a coal mill (not shown in the figure);

[0035] A sieve plate 2, which is inclined and movably connected in the feed bin 1, and a plurality of sieve holes are distributed on its plate surface to form a coal material sorting surface, and the bottom end of its inclined surface extends to the opening of the feed bin 1;

[0036] A crushing component 3, including a collection bin 31 connected to the opening of the feed bin 1, which is used to receive the coal material screened by the sieve plate 2. A crushing roller 32 is rotatably arranged in the collection bin 31 and is conically arranged with its conical head end corresponding to the outlet direction of the sieve plate 2 for crushing the coal material. A guide plate 33 for guiding the coal material to move towards the conical tail end direction is spirally arranged on the outer wall of the crushing roller 32;

[0037] A crushing table 34 is arranged on the inner wall of the bin body below the crushing roller 32, and its working surface forms a gradually shrinking crushing cavity with the conical surface of the crushing roller 32, and the distance decreases along the direction from the conical head to the conical tail;

[0038] One side of the collection bin 31 is also provided with a first power unit 35 for driving the crushing roller 32 to rotate. A return pipe 4 for conveying the crushed coal material into the feed bin 1 is also arranged between the collection bin 31 and the feed bin 1;

[0039] A transmission component 5 is arranged between the crushing roller 32 and the sieve plate 2, and the crushing roller 32 drives the sieve plate 2 to vibrate in the feed bin 1 through the transmission component 5.

[0040] In specific implementation, when the coal material enters the feed bin 1, the coal material with qualified particle size falls into the coal mill through the sieve holes on the sieve plate 2. At the same time, the sieve plate 2 intercepts the coal material with particle size larger than the predetermined value and guides it into the collection bin 31. At this time, the crushing table 34 guides the coal material with large particle size to move to the gap between the crushing table 34 and the crushing roller 32. Meanwhile, the first power unit 35 drives the crushing roller 32 to rotate. The guiding plate 33 rotates together with the crushing roller 32 and guides the coal material to move towards the return pipe 4. When the crushing roller 32 rotates, it drives the sieve plate 2 to vibrate in the feed bin 1 through the transmission component 5, thereby improving the conveying efficiency of the coal material and preventing the sieve plate 2 from being blocked. When the coal material moves, since the gap between the crushing table 34 and the crushing roller 32 gradually decreases, the coal material is squeezed between the crushing table 34 and the crushing roller 32 until the coal material is crushed, thereby reducing the particle size of the coal material. The crushed coal material is conveyed into the feed bin 1 through the return pipe 4.

[0041] In the present invention, through the cooperation between the sieve plate 2 and the crushing component 3, the sieve plate 2 intercepts the coal material with large particle size and conveys it into the collection bin 31. At this time, the first power unit 35 drives the crushing roller 32 to rotate and guides the coal material to move towards the return pipe 4. During the movement of the coal material, since the gap between the crushing table 34 and the crushing roller 32 gradually decreases, the coal material is squeezed between the crushing table 34 and the crushing roller 32 until the coal material is crushed. The crushed coal material is conveyed into the feed bin 1 through the return pipe 4, reducing the probability of blockage of the feed bin 1 and ensuring the quality and efficiency of the subsequent coal grinding process.

[0042] Preferably, the first power unit 35 can adopt a motor in the prior art.

[0043] In an embodiment, the crushing table 34 is slidably arranged along the axial direction of the crushing roller 32 in the collection bin 31, and a pushing component 6 is arranged between the crushing table 34 and the crushing roller 32. One end of the pushing component 6 is connected to the guiding plate 33. When the crushing roller 32 rotates, the pushing component 6 drives the crushing table 34 to reciprocate along the axial direction of the crushing roller axis through the rotation of the guiding plate 33.

[0044] With such a design, when the crushing roller 32 rotates, since the corresponding end of the pushing component 6 contacts the guiding plate 33, when the guiding plate 33 rotates, it drives the crushing table 34 to move towards the direction close to the return pipe 4 through the pushing component 6. At this time, the gap between the guiding table and the crushing roller 32 decreases, and the coal material on the working surface of the guiding table is squeezed. Until the crushing table 34 moves to the predetermined position, the pushing component 6 drives the crushing table 34 to move away from the return pipe 4. At this time, the gap between the guiding table and the crushing roller 32 increases until the crushing table 34 moves towards the direction close to the return pipe 4 next time. Thus, through the reciprocating movement of the crushing table 34 along the axis of the crushing roller 32, the crushing and conveying efficiency of the coal material is improved.

[0045] It should be noted that a baffle 9 is provided above one end of the crushing table 34 close to the sieve plate 2. When the crushing table 34 moves away from the sieve plate 2, the baffle 9 prevents the coal material from falling between the corresponding inner wall of the collecting bin 31 and one end of the crushing table 34 close to the sieve plate 2, ensuring the normal operation of the crushing table 34.

[0046] In one embodiment, a guiding groove 311 parallel to the axial direction of the crushing table 34 and an adjusting bin 312 communicating with the inside of the collecting bin 31 are formed on the side wall of the collecting bin 31;

[0047] The pushing member 6 includes a positioning sleeve 61 slidably disposed in the guiding groove 311. An abutting rod 62 axially slidable is disposed in the positioning sleeve 61. One end of the abutting rod 62 close to the crushing roller 32 extends to form a contact fit with the guiding plate 33 and the crushing roller 32;

[0048] A first magnetic attraction unit 63 is provided at one end of the abutting rod 62 away from the guiding plate 33. A second magnetic attraction unit 64 attracted thereto is provided at the corresponding position of the collecting bin 31. A first elastic unit 65 applying an elastic force to the abutting rod 62 in the direction close to the crushing roller 32 is provided between the positioning sleeve 61 and the abutting rod 62;

[0049] A reset assembly is further included between the crushing table 34 and the collecting bin 31. When the abutting rod 62 is separated from the guiding plate 33, the reset assembly is used to apply a pulling force to the crushing table 34 in the direction close to the sieve plate 2.

[0050] With such a design, when the crushing roller 32 rotates, the guiding plate 33 rotates with the crushing roller 32 and drives the abutting rod 62 to move in the direction close to the tapered tail end of the crushing roller 32. The abutting rod 62 moves away from the crushing roller 32 under the influence of the radial extrusion force generated by the gradually increasing cross-sectional surface area of the crushing roller 32. At this time, the first elastic unit 65 is stretched. Since the first elastic unit 65 always applies a pulling force to the abutting rod 62 in the direction close to the crushing roller 32, the abutting rod 62 always contacts the crushing roller 32 and the guiding plate 33 until the first magnetic attraction unit 63 moves to the corresponding position of the second magnetic attraction unit 64. At this time, the second magnetic attraction unit 64 applies an attraction force to the first magnetic attraction unit 63 and separates it from the guiding plate 33. The crushing table 34 loses restraint, and the reset assembly drives the crushing table 34 to move in the direction close to the sieve plate 2 until the second magnetic attraction unit 64 is misaligned with the first magnetic attraction unit 63 and no longer applies an attraction force to it. The first elastic unit 65 loses restraint and drives the abutting rod 62 to move in the direction close to the crushing roller 32.

[0051] Preferably, the first elastic unit 65 can adopt a tension spring in the prior art.

[0052] Preferably, the first magnetic attraction unit 63 and the second magnetic attraction unit 64 can adopt magnetic attraction blocks in the prior art.

[0053] In one embodiment, the reset assembly includes a second elastic unit 66 disposed between the crushing table 34 and the collection bin 31, and the second elastic unit 66 is configured to provide a pulling force to the crushing table 34 in the direction close to the sieve plate 2.

[0054] With such a design, when the guiding table moves in the direction close to the return pipe 4, the second elastic unit 66 is stretched. When the abutting rod 62 is separated from the guiding plate 33, the second elastic unit 66 loses its constraint and applies a pulling force to the crushing table 34 in the direction close to the sieve plate 2, thereby resetting the guiding table.

[0055] Preferably, the second elastic unit 66 can adopt a tension spring in the prior art.

[0056] It should be noted that the pulling force of the second elastic unit 66 is greater than the magnetic attraction force between the first magnetic attraction unit 63 and the second magnetic attraction unit 64, so that the first magnetic attraction unit 63 and the second magnetic attraction unit 64 can be normally separated.

[0057] In one embodiment, a sliding groove 313 extending along the direction of the guiding groove 311 is formed in the adjustment bin 312;

[0058] A guiding member 7 is provided in the adjustment bin 312, including a first abutting block 71 vertically and slidably inserted at one end of the abutting rod 62 close to the adjustment bin 312. The first abutting block 71 corresponds to the sliding groove 313. When the first abutting block 71 is inserted into the sliding groove 313, the first abutting block 71 is configured to restrict the abutting rod 62 from moving in the direction close to the crushing roller 32. A second abutting block 72 for pressing down the first abutting block 71 is provided at one end of the sliding groove 313 away from the second magnetic attraction unit 64;

[0059] A third elastic unit 73 is further provided between the first abutting block 71 and the abutting rod 62, and is configured to apply an upward elastic force to the first abutting block 71.

[0060] With such a design, when the end of the abutting rod 62 close to the first magnetic attraction unit 63 contracts inside the sleeve, the first abutting block 71 contracts inside the abutting rod 62 and its top contacts the inner wall of the sleeve. The third unit is compressed. When the second magnetic attraction unit 64 attracts the first magnetic attraction unit 63, the end of the abutting rod 62 close to the first magnetic attraction unit 63 extends out of the sleeve and extends into the adjustment chamber 312. At this time, the first abutting block 71 corresponds to the chute 313. The third elastic unit 73 loses its restraint and applies an upward elastic force to the first abutting block 71, causing the first abutting block 71 to be inserted into the chute 313. At this time, the first abutting block 71 prevents the abutting rod 62 from moving towards the crushing roller 32, avoiding accidental contact between the abutting rod 62 and the guide plate 33 and the crushing roller 32. When the crushing table 34 moves towards the sieve plate 2, the first abutting block 71 moves together in the chute 313 until it contacts the second abutting block 72. At this time, the second abutting block 72 applies a downward squeezing force to the first abutting block 71 until the first abutting block 71 withdraws from the chute 313. At this time, the first elastic unit 65 loses its restraint and drives the abutting rod 62 to move towards the crushing roller 32 until the end of the abutting rod 62 close to the first magnetic attraction unit 63 contracts into the sleeve.

[0061] In one embodiment, the transmission component 5 includes a third abutting block 51 provided at the bottom of the inclined surface end of the sieve plate 2, and a connection disk 52 provided at the conical top of the crushing roller 32. A fourth abutting block 53 that is in top-pushing cooperation with the third abutting block 51 is provided on the connection disk 52.

[0062] With such a design, when the crushing roller 32 rotates, the connection disk 52 drives the fourth abutting block 53 to rotate together until the fourth abutting block 53 contacts the third abutting block 51 and applies an upward thrust to it. Subsequently, the fourth abutting block 53 separates from the third abutting block 51 and waits for the next contact. By the fourth abutting block 53 reciprocally pushing the third abutting block 51, the vibration of the sieve plate 2 is realized.

[0063] In one embodiment, an aggregate component 8 is further provided in the collection bin 31. The aggregate component 8 includes a push plate 81 provided at one end of the crushing table 34 close to the return pipe 4 for pushing the coal material. Two oppositely arranged guide plates 82 are further provided at the joint of the collection bin 31 and the return pipe 4. Inclined surfaces are formed on each guide plate 82, and the bottom end of its inclined surface is communicated with the inlet of the return pipe 4. Each guide plate 82 is used to guide the coal material into the return pipe 4.

[0064] With such a design, when the crushing table 34 moves towards the return pipe 4, the push plate 81 pushes the crushed small-particle coal material towards the return pipe 4. At the same time, each guide plate 82 conveys the small-particle coal material in the collection bin 31 towards the return pipe 4, improving the coal material conveying efficiency.

[0065] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0066] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0067] In addition, "a plurality of" means two or more.

[0068] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A coal mill feeding device, characterized in that, Comprising: A feed bin (1) with an opening provided on its side wall; A sieve plate (2) which is inclined and disposed in the feed bin (1) and is movably connected thereto. Multiple sieve holes are distributed on the plate surface to form a coal sorting surface, and the bottom end of its inclined surface extends to the opening of the feed bin (1); A crushing component (3), including a collection bin (31) connected to the opening of the feed bin (1) for receiving the coal screened by the sieve plate (2). A crushing roller (32) which is conically arranged and whose conical head end corresponds to the bottom end direction of the inclined surface of the sieve plate (2) is rotatably provided in the collection bin (31) for crushing coal. A guiding plate (33) for guiding the coal to move towards the conical tail end direction is spirally provided on the outer wall of the crushing roller (32); A crushing platform (34) is provided on the inner wall of the bin body below the crushing roller (32), and its working surface forms a gradually shrinking crushing cavity with the conical surface of the crushing roller (32), and the distance decreases along the direction from the conical head to the conical tail; On one side of the collection bin (31), a first power unit (35) for driving the crushing roller (32) to rotate is provided. A return pipe (4) for conveying the crushed coal into the feed bin (1) is also provided between the collection bin (31) and the feed bin (1); A transmission component (5) is disposed between the crushing roller (32) and the sieve plate (2), and the crushing roller (32) drives the sieve plate (2) to vibrate in the feed bin (1) through the transmission component (5).

2. The coal mill feeding device according to claim 1, characterized in that: The crushing platform (34) is slidably disposed along the axial direction of the crushing roller (32) in the collection bin (31), and a pushing component (6) for driving it to slide towards the conical tail end is provided between the crushing platform (34) and the crushing roller (32).

3. The coal feeder device for a coal mill according to claim 2, characterized in that: A guiding groove (311) parallel to the axial direction of the crushing platform (34) and a communicating adjustment bin (312) are provided on the side wall of the collection bin (31); The pushing component (6) includes a positioning sleeve (61) slidably disposed in the guiding groove (311). An abutting rod (62) which can axially slide is inserted into the positioning sleeve (61), and one end of the abutting rod (62) close to the crushing roller (32) extends to form a contact fit with the guiding plate (33); A first magnetic attraction unit (63) is provided at one end of the abutting rod (62) away from the guiding plate (33), and a second magnetic attraction unit (64) which attracts it is provided at the corresponding position of the collection bin (31). A first elastic unit (65) for applying an elastic force towards the crushing roller (32) direction to the abutting rod (62) is provided between the positioning sleeve (61) and the abutting rod (62); A reset assembly is further included and is disposed between the crushing platform (34) and the collection bin (31) for applying a pulling force towards the direction close to the sieve plate (2) to the crushing platform (34).

4. The coal feeder device for a coal mill according to claim 3, characterized in that: The reset assembly includes a second elastic unit (66) disposed between the crushing platform (34) and the collection bin (31) for providing a pulling force towards the direction close to the sieve plate (2) to the crushing platform (34).

5. The coal feeder device for a coal mill according to claim 3, characterized in that: A sliding groove (313) extending along the setting direction of the guiding groove (311) is provided in the adjustment bin (312); A guiding component (7) is arranged in the adjustment bin (312), which includes a first abutting block (71) vertically and slidably inserted at one end of the abutting rod (62) close to the adjustment bin (312), and a second abutting block (72) for pressing down the first abutting block (71) is arranged at one end of the sliding groove (313) far from the second magnetic attraction unit (64); A third elastic unit (73) that applies an upward vertical elastic force to the first abutting block (71) is further arranged between the first abutting block (71) and the abutting rod (62).

6. The coal feeder device for a coal mill according to claim 1, characterized in that: The transmission component (5) includes a third abutting block (51) arranged at the bottom of the inclined plane end of the sieve plate (2), and a connecting plate (52) arranged at the conical top of the crushing roller (32), and a fourth abutting block (53) that is in top-pushing cooperation with the third abutting block (51) is arranged on the connecting plate (52).

7. The coal feeder device for a coal mill according to claim 1, characterized in that: A coal material pushing plate (81) is arranged at the end of the crushing table (34) close to the return pipe (4), and a guide plate (82) for guiding the coal material into the return pipe (4) is further arranged at the joint of the collection bin (31) and the return pipe (4).

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