Coal pulverizer

Abstract

The utility model relates to the field of processing machinery, and particularly discloses a coal crusher which comprises a crushing cavity and a material conveying channel, the crushing cavity comprises a crushing main cavity, a feed port and a discharge port, the material conveying channel is communicated with the feed port, and the feed port and the discharge port are respectively arranged at two ends of the crushing main cavity. The crushing cavity comprises a crushing main cavity, a plurality of crushing paddles and a discharging fan blade, the crushing paddles and the discharging fan blade coaxially rotate and are arranged in the crushing main cavity, the discharging opening is formed in one side of the crushing main cavity, and the discharging fan blade is located above the discharging opening. Coal is conveyed to the crushing main cavity through the conveying channel, the coal in the crushing main cavity is beaten and collided by the crushing paddles, the beaten coal is ground into small coal particles, and the coal is conveyed out of the crushing main cavity through the discharging fan blade through the discharging port. And the volume of a single coal particle can be greatly reduced by the coal material beaten by the heavy and heavy crushing paddles, so that the screening and reworking steps are reduced, and the working efficiency of crushing the coal material is improved.

Description

Technical Field

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

[0002] Coal is one of the most common combustible fuels. Power plant boilers require very fine coal powder for combustion. Before coal lumps are put into use, they need to be ground to improve their combustion efficiency. Therefore, the coal entering the power plant needs to be crushed. Depending on the crushing machinery, the crushing process is divided into two steps: coarse crushing and fine grinding. Coarse crushing breaks large coal lumps into smaller coal particles. However, even after crushing coal lumps, existing mechanical coal crushers still have large coal lumps mixed in. These large lumps need to be screened out and crushed again, which increases the number of working steps and reduces work efficiency.

[0003] The technical problem to be solved by this application is: how to improve the crushing efficiency of a coal crusher. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a coal crusher.

[0005] The technical solution adopted by this utility model is as follows: a coal crusher, including a crushing chamber and a conveying channel. The crushing chamber includes a main crushing chamber, a feed inlet and a discharge outlet. The conveying channel is connected to the feed inlet. The feed inlet and the discharge outlet are respectively located at both ends of the main crushing chamber. The crushing chamber includes a main crushing chamber, a number of crushing paddles and discharge fan blades. The crushing paddles and discharge fan blades rotate coaxially and are located inside the main crushing chamber. The discharge outlet is located on one side of the main crushing chamber and the discharge fan blades are located above the discharge outlet.

[0006] In some embodiments, the material conveying channel includes a material conveying chamber and a material conveying spiral blade. The material conveying spiral blade rotates within the material conveying chamber and is limited to one side. One end of the material conveying spiral blade is provided with a material conveying drive element, and the output end of the material conveying drive element drives the material conveying spiral blade to rotate.

[0007] In some embodiments, the crushing impeller includes a crushing stationary plate and crushing blades, with a plurality of crushing blades evenly distributed on the outer wall of the crushing stationary plate, and the included angle between the crushing blades and the crushing stationary plate being set as a right angle.

[0008] In some implementations, the number of crushing blades is reduced as the crushing paddle is closer to the feed inlet.

[0009] In some embodiments, the inner wall of the main crushing chamber is provided with transverse partitions between the crushing paddles to form crushing channels, the crushing channels are interconnected, and the channel walls of the crushing channels are provided with a number of crushing points.

[0010] In some implementations, the axial direction of the crushing protrusion is aligned with the axial direction of the main crushing chamber.

[0011] In some implementations, the discharge port is designed with an inner square and an outer circle shape, with the end of the discharge port near the main crushing chamber being square.

[0012] In some embodiments, the device includes a frame, a material conveying channel mounted on the frame, a material conveying drive element mounted on a mounting plate, a mounting plate with fixing holes at each of the four corners, fixing screws and fixing nuts below the fixing holes, the fixing screws and fixing nuts being threadedly engaged, the fixing screws being fixedly connected to the frame, and the fixing nuts abutting against the bottom of the mounting plate.

[0013] In some embodiments, the material conveying channel includes a material conveying port connected to the outside and a material feeding port connected to the inlet, with one end of the material conveying chamber connected to the material conveying port and the other end connected to the material feeding port.

[0014] In some embodiments, the material conveying channel includes an observation port located above the end of the material conveying auger near the inlet.

[0015] The beneficial effects of this utility model are as follows:

[0016] The coal crusher conveys coal into the main crushing chamber through a conveying channel. Inside the main crushing chamber, the coal is struck and collided by several crushing paddles. After being struck, the coal is ground into smaller coal particles. The discharge fan blows the coal out of the main crushing chamber through the discharge port. The coal, after being struck by multiple crushing paddles, can greatly reduce the volume of individual coal particles, reduce the screening and rework steps, and improve the working efficiency of coal crushing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the crushing chamber;

[0019] Figure 3 This is a schematic diagram of the internal structure of the main crushing chamber;

[0020] Figure 4 This is a schematic diagram of the connection structure between the material conveying drive element and the mounting plate.

[0021] The labels and names in the diagram correspond as follows: 1. Frame; 2. Crushing chamber; 3. Conveying channel; 21. Main crushing chamber; 22. Discharge port; 23. Crushing drive shaft; 24. Crushing paddle; 25. Discharge fan blade; 26. Crushing protrusion; 27. Crushing drive element; 28. Bearing seat; 31. Conveying port; 32. Observation window; 33. Conveying chamber; 35. Conveying drive element; 36. Mounting plate; 37. Fixing screw; 38. Fixing nut. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0023] Please see Figure 1 This utility model provides a technical solution: a coal crusher, including a frame 1, a crushing chamber 2, and a conveying channel 3. The crushing chamber 2 and the conveying channel 3 are respectively disposed on the frame 1. The crushing chamber 2 includes a main crushing chamber 21, a feed inlet, and a discharge outlet 22, which are respectively disposed at both ends of the main crushing chamber 21. The conveying channel 3 includes a conveying outlet 31 communicating with the outside and a feeding inlet communicating with the feed inlet.

[0024] The material conveying channel 3 includes a material conveying chamber 33 and a material conveying spiral blade. One end of the material conveying chamber 33 is connected to the material conveying port 31 and the other end is connected to the feeding port. The material conveying spiral blade rotates within the material conveying chamber 33. One end of the material conveying spiral blade is provided with a material conveying drive element 35. The output end of the material conveying drive element 35 drives the material conveying spiral blade to rotate through a chain and a sprocket.

[0025] Please see Figure 2 and Figure 3 The crushing chamber 2 includes a crushing drive shaft 23, a crushing paddle 24, and a discharge fan 25. The crushing paddle 24 and the discharge fan 25 rotate coaxially. The crushing paddle 24 and the discharge fan 25 are respectively fixedly installed on the outer wall of the crushing drive shaft 23. There are four crushing paddles. The crushing paddles 24 are installed in the main crushing chamber 21 and are positioned closer to the feed inlet. The discharge fan 25 are installed in the main crushing chamber 21 and are positioned closer to the discharge outlet 22. The crushing paddle 24 includes a crushing fixed plate and crushing blades. The center point of the crushing fixed plate is fixedly connected to the crushing drive shaft 23. Several crushing blades are evenly distributed on the outer wall of the crushing fixed plate, and the included angle between the crushing blades and the crushing fixed plate is set as a right angle. Because the crushing degree of the coal varies depending on the position of the crushing paddle 24, the crushing paddle 24 closer to the feed inlet crushes a larger volume of coal, so fewer crushing blades are set, which is convenient for crushing larger pieces of coal. If the crushing blades are set too densely, they are easily stuck by the coal. In this application, the four crushing paddles 24 set from the feed inlet to the discharge outlet 22 have 7, 9, 11 and 11 crushing blades respectively, with fewer crushing blades set closer to the feed inlet.

[0026] The inner wall of the main crushing chamber 21 is provided with transverse partitions between the crushing blades 24, which divide the position of a single crushing blade 24 into a single crushing channel. The crushing channels are interconnected. The channel wall of the crushing channel is provided with a number of crushing protrusions 26. The axial direction of the crushing protrusions 26 is consistent with the axial direction of the main crushing chamber 21. The crushing protrusions 26 increase the friction between the coal and the crushing channel. When the crushing blades 24 rotate, they can easily strike the coal in the crushing channel to achieve the purpose of crushing the coal.

[0027] The crushing drive shaft 23 is provided with bearing seats 28 at both ends. The bearing seats 28 are fixedly connected to the frame 1. The frame 1 is provided with a crushing drive element 27, which is a motor. The crushing drive element 27 drives the crushing drive shaft 23 to rotate through a synchronous belt and a pulley. The crushing drive shaft 23 rotates in the crushing main chamber 21 through the bearing seats 28.

[0028] The discharge port 22 is located on one side of the main crushing chamber 21, and the discharge fan 25 is located above the discharge port 22. The coal material crushed by the crushing paddle 24 is transferred to the discharge port 22 through the discharge fan 25. The discharge port 22 is designed with an inner square and an outer circle shape. The end of the discharge port 22 near the main crushing chamber 21 is square to facilitate the removal of coal material. Because the lower part of the main crushing chamber 21 is square, the cylindrical discharge port 22 is prone to coal material accumulation in the main crushing chamber 21. The inner square and outer circle discharge port 22 can reduce the accumulation of coal material and increase the convenience of coal output.

[0029] The rotational speed of the conveying drive element 35 is adjusted according to the amount of coal entering the conveying channel 3. The rotational speed of the conveying drive element 35 and the rotational speed of the crushing drive element 27 are set accordingly. When the rotational speed of the conveying drive element 35 is fast, the rotational speed of the crushing drive element 27 is fast, and when the rotational speed of the conveying drive element 35 is slow, the rotational speed of the crushing drive element 27 is fast.

[0030] Please see Figure 4 In order to adjust the tension of the chain, in this embodiment, preferably, the material conveying drive element 35 is provided with a mounting plate 36. The material conveying drive element 35 is fixedly mounted on the mounting plate 36. The mounting plate 36 has fixing holes at its four corners. Below the fixing holes, there are fixing screws 37 and fixing nuts 38. The fixing screws 37 are fixedly connected to the frame 1. The fixing screws 37 and fixing nuts 38 are threadedly engaged. The fixing nuts 38 abut against the bottom of the mounting plate 36. By rotating the fixing nuts 38 located at the four corners of the mounting plate 36, the height of the material conveying drive element 35 can be controlled, thereby adjusting the tension of the chain.

[0031] To facilitate observation or handling of the coal material in the conveying channel 3, the conveying channel 3 includes an observation port, which is located above the end of the conveying spiral blade near the feed inlet. This allows observation of both the conveying status of the spiral blade and the status of the feed inlet.

[0032] The working principle and usage process of this utility model are as follows: Coal enters the conveying channel 3 from the conveying port 31. The conveying spiral blade transports the coal to the feeding port and enters the crushing main chamber 21 through the feeding port. The coal collides and crushes with several crushing blades 24 in the crushing channel. Finally, the coal reaches the end of the crushing main chamber 21 and the discharge fan blade 25 sends the coal out of the feeding port to complete the discharge.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. Coal mill, characterized in that, The device includes a crushing chamber (2) and a conveying channel (3). The crushing chamber (2) includes a main crushing chamber (21), a feed inlet and a discharge outlet (22). The conveying channel (3) is connected to the feed inlet. The feed inlet and the discharge outlet (22) are respectively located at both ends of the main crushing chamber (21). The crushing chamber (2) includes a main crushing chamber (21), several crushing paddles (24) and discharge fan blades (25). The crushing paddles (24) and the discharge fan blades (25) rotate coaxially and are located inside the main crushing chamber (21). The discharge outlet (22) is located on one side of the main crushing chamber (21) and the discharge fan blades (25) are located above the discharge outlet (22).

2. The coal mill according to claim 1, characterized in that, The material conveying channel (3) includes a material conveying chamber (33) and a material conveying spiral blade. The material conveying spiral blade rotates within the material conveying chamber (33) and a material conveying drive element (35) is provided at one end of the material conveying spiral blade. The output end of the material conveying drive element (35) drives the material conveying spiral blade to rotate.

3. The coal mill according to claim 1, characterized in that, The crushing paddle (24) includes a crushing fixed plate and crushing blades. Several crushing blades are evenly distributed on the outer wall of the crushing fixed plate, and the included angle between the crushing blades and the crushing fixed plate is set as a right angle.

4. The coal mill according to claim 1, characterized in that, The closer the crushing paddle (24) is to the feed inlet, the fewer the number of crushing blades it has.

5. The coal mill according to claim 1, characterized in that, The inner wall of the main crushing chamber (21) is provided with a transverse partition between the crushing paddles (24) to form a crushing channel. The crushing channels are interconnected, and the channel wall of the crushing channel is provided with a number of crushing protrusions (26).

6. The coal mill according to claim 5, characterized in that, The axial direction of the crushing protrusion (26) is consistent with the axial direction of the crushing main cavity (21).

7. The coal mill according to claim 1, characterized in that, The discharge port (22) is designed with an inner square and an outer circle shape, and the end of the discharge port (22) near the main crushing chamber (21) is square.

8. The coal mill according to claim 2, characterized in that, The device includes a frame (1), a material conveying channel (3) is provided on the frame (1), a material conveying drive element (35) is provided with a mounting plate (36), the material conveying drive element (35) is fixedly provided on the mounting plate (36), the mounting plate (36) is provided with fixing holes at the four corners, and fixing screws (37) and fixing nuts (38) are provided below the fixing holes. The fixing screws (37) and fixing nuts (38) are threaded together, the fixing screws (37) are fixedly connected to the frame (1), and the fixing nuts (38) abut against the bottom of the mounting plate (36).

9. The coal mill according to claim 2, characterized in that, The material conveying channel (3) includes a material conveying port (31) connected to the outside and a feeding port connected to the inlet. One end of the material conveying chamber (33) is connected to the material conveying port (31) and the other end is connected to the feeding port.

10. The coal mill according to claim 1, characterized in that, The material conveying channel (3) includes an observation port, which is located above the end of the material conveying spiral blade near the inlet.

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