Coal mill capable of adjusting workload

Abstract

The coal mill comprises an outer shell, the upper side of the outer shell is communicated with a feeding pipe, the outer side of the feeding pipe is sleeved with a movable cover, an electric telescopic rod is installed on the top of the inner side of the outer shell, and the output end of the electric telescopic rod is connected with the movable cover; a fixing cover is installed in the outer shell, a first motor is installed in the fixing cover, the output end of the first motor is connected with a main rotating shaft, the outer side of the main rotating shaft is sleeved with an auxiliary rotating shaft, the lower end of the auxiliary rotating shaft is connected with a connecting frame, and a grinding roller is installed at the lower end of the connecting frame. And a convex block is mounted at the top of the inner side of the fixed cover. According to the coal mill capable of adjusting the workload, the movable cover can be controlled and driven to move, and the distance between the movable cover and the fixed cover can be adjusted, so that the size of a feeding channel between the movable cover and the fixed cover is adjusted, the grinding workload in the grinding mesh plate can be adjusted, and the situation that due to excessive feeding of coal briquettes, materials are stuck in a grinding area is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mills, in particular to a coal mill capable of adjusting workload. Background Art

[0002] Coal mill is used to crush coal blocks and grind them into powder. It is an important equipment and is often used in the auxiliary system of pulverized coal furnace. Coal mill plays an important role in industrial production, especially for industries that rely on pulverized coal production, such as cement, metallurgy, chemical industry, thermal power plants and other fields.

[0003] However, when the coal mill is grinding coal blocks, its workload cannot be easily adjusted. Excessive workload will lead to a large amount of coal grinding area, resulting in accumulation and jamming of materials. Directly using the rotating grinding method for grinding is not conducive to reducing the grinding gap according to the reduction of the volume of the coal blocks, affecting the coal powder grinding accuracy, and resulting in a large number of large coal blocks remaining in the grinding area. Therefore, we proposed a coal mill that can adjust the workload to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a coal mill capable of adjusting its workload, so as to solve the problem raised by the above-mentioned background technology that the workload cannot be conveniently adjusted in the current market, which is not conducive to reducing the grinding gap according to the reduction of the coal block volume, affecting the coal powder grinding accuracy, and resulting in a large number of large coal blocks remaining in the grinding area.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a coal mill capable of adjusting the workload, comprising an outer shell, the upper side of the outer shell being connected to a feeding pipe, the outer side of the feeding pipe being sheathed with a movable cover, an electric telescopic rod being installed on the top of the inner side of the outer shell, the output end of the electric telescopic rod being connected to the movable cover;

[0006] A fixed cover is installed inside the outer shell, and a first motor is installed inside the fixed cover. The output end of the first motor is connected to a main shaft, and an auxiliary shaft is sleeved on the outer side of the main shaft. The lower end of the auxiliary shaft is connected to a connecting frame, and the lower end of the connecting frame is installed with an abrasive roller;

[0007] A convex block is installed on the top of the inner side of the fixed cover;

[0008] An abrasive mesh plate is installed on the inner wall of the outer shell, a baffle is connected to the lower side of the inner shell, a second motor is installed inside the baffle, an output end of the second motor is connected to a screw, an outer side of the screw is threadedly connected to a baffle, a slide rod passes through the baffle, and the lower end of the slide rod is connected to the baffle;

[0009] A collecting tank is provided inside the lower section of the outer shell.

[0010] Preferably, a strong spring is connected between the secondary rotating shaft and the main rotating shaft, a limiting rod is connected to the inner side of the upper end of the secondary rotating shaft, the limiting rod passes through the main rotating shaft, a mounting plate is installed on the outer side of the secondary rotating shaft, and a protruding rod is connected to the end of the mounting plate.

[0011] Preferably, the movable cover is slidably connected to the feeding pipe, the lower section of the movable cover is inclined, and the inclined surface of the movable cover and the inclined surface of the fixed cover are parallel to each other. This design can adjust the distance between the movable cover and the fixed cover, thereby adjusting the amount of coal blocks entering.

[0012] Preferably, the auxiliary shaft and the limiting rod can both slide on the main shaft, and the main shaft is a "U"-shaped structure. This design ensures that the auxiliary shaft can move up and down while limiting the auxiliary shaft to rotate with the main shaft.

[0013] Preferably, the outer surface of the abrasive roller is rough, and the opposing surfaces of the abrasive roller and the abrasive mesh plate are both inclined. This design can utilize the friction between the abrasive roller and the abrasive mesh plate to grind the coal blocks.

[0014] Preferably, the convex block is a trapezoidal structure, and the position of the convex block is set corresponding to the position of the convex rod. This design can use the convex block to realize the downward movement of the convex rod, thereby controlling the movement of the auxiliary shaft and further controlling the movement of the abrasive roller.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] (1) The coal mill capable of adjusting the workload can control the movement of the movable cover, adjust the distance between the movable cover and the fixed cover, and thus adjust the size of the feed channel between the movable cover and the fixed cover, thereby adjusting the grinding workload in the abrasive mesh plate to avoid excessive feeding of coal blocks and causing material jamming in the grinding area;

[0017] (2) The coal mill capable of adjusting the workload can utilize the intermittent contact between the cam and the cam rod when the main shaft drives the secondary shaft to rotate, and cooperate with the elastic force of the strong spring to make the secondary shaft move up and down intermittently while following the rotation of the main shaft, thereby controlling the rotation and up and down movement of the abrasive roller, using the downward force to press the coal block, and adapting to the reduction in the volume of the ground coal block to reduce the gap between the abrasive roller and the abrasive mesh plate, thereby accelerating the grinding of the coal block into powder, improving its grinding fineness, and reducing the amount of large coal blocks remaining in the grinding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the outer shell of the utility model;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the auxiliary rotating shaft of the utility model;

[0022] Figure 5 This is a schematic diagram of the auxiliary shaft structure of the utility model;

[0023] Figure 6 For this utility model Figure 2 A in the figure is an enlarged structural diagram.

[0024] In the figure: 1. outer shell; 2. feeding tube; 3. electric telescopic rod; 4. movable cover; 5. fixed cover; 6. first motor; 7. main rotating shaft; 8. secondary rotating shaft; 9. connecting frame; 10. abrasive roller; 11. abrasive mesh plate; 12. block seat; 13. block cover; 14. second motor; 15. screw rod; 16. sliding rod; 17. collecting trough; 18. bump; 19. strong spring; 20. limit rod; 21. mounting plate; 22. bump rod. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0026] See also Figures 1-6 The utility model provides the following technical solution: a coal mill capable of adjusting the workload, comprising an outer shell 1, a feeding pipe 2 being connected to the upper side of the outer shell 1, a movable cover 4 being sleeved on the outer side of the feeding pipe 2, an electric telescopic rod 3 being installed on the top of the inner side of the outer shell 1, and an output end of the electric telescopic rod 3 being connected to the movable cover 4; a fixed cover 5 being installed inside the outer shell 1, a first motor 6 being installed inside the fixed cover 5, an output end of the first motor 6 being connected to a main rotating shaft 7, an auxiliary rotating shaft 8 being sleeved on the outer side of the main rotating shaft 7, a connecting frame 9 being connected to the lower end of the auxiliary rotating shaft 8, and an abrasive roller 10 being installed at the lower end of the connecting frame 9;

[0027] Furthermore, the movable cover 4 is slidably connected to the feeding pipe 2, the lower section of the movable cover 4 is inclined, and the inclined surface of the movable cover 4 and the inclined surface of the fixed cover 5 are parallel to each other;

[0028] The coal blocks are fed into the outer shell 1 through the feeding pipe 2 and fall onto the abrasive mesh plate 11 along the channel between the movable cover 4 and the fixed cover 5. The electric telescopic rod 3 can be powered on to control the movable cover 4 to move up and down. The upward movement of the movable cover 4 can increase the distance between the movable cover 4 and the fixed cover 5, while the downward movement of the movable cover 4 can reduce the distance between the movable cover 4 and the fixed cover 5, thereby adjusting the size of the feeding channel between the movable cover 4 and the fixed cover 5, and further adjusting the grinding workload in the abrasive mesh plate 11;

[0029] Furthermore, a protrusion 18 is installed on the top of the inner side of the fixed cover 5; an abrasive mesh plate 11 is installed on the inner wall of the outer shell 1, and a blocking cover 13 is connected to the lower side of the inner side of the outer shell 1. A second motor 14 is installed inside the blocking cover 13, and a screw rod 15 is connected to the output end of the second motor 14. The outer side of the screw rod 15 is threadedly connected to the blocking seat 12. A slide rod 16 passes through the blocking seat 12, and the lower end of the slide rod 16 is connected to the blocking cover 13; a collection tank 17 is opened inside the lower section of the outer shell 1;

[0030] Specifically, a strong spring 19 is connected between the auxiliary rotating shaft 8 and the main rotating shaft 7, and a limit rod 20 is connected to the inner side of the upper end of the auxiliary rotating shaft 8. The limit rod 20 passes through the main rotating shaft 7, and a mounting plate 21 is installed on the outer side of the auxiliary rotating shaft 8. The end of the mounting plate 21 is connected to a protruding rod 22; the auxiliary rotating shaft 8 and the limit rod 20 can both slide on the main rotating shaft 7, and the main rotating shaft 7 has a "U"-shaped structure; the outer surface of the abrasive roller 10 is rough, and the opposing surfaces of the abrasive roller 10 and the abrasive mesh plate 11 are both inclined; the protrusion 18 has a trapezoidal structure, and the position of the protrusion 18 corresponds to the position of the protruding rod 22.

[0031] The first motor 6 is powered on to control the main shaft 7 connected to the output end to rotate. The main shaft 7 drives the secondary shaft 8 to rotate, thereby controlling the connecting frame 9 to drive the abrasive roller 10 to rotate, and the abrasive roller 10 is used to grind the coal blocks on the abrasive mesh plate 11. When the position of the protruding rod 22 gradually corresponds to the position of the protruding block 18, the protruding block 18 presses the protruding rod 22, so that the mounting plate 21 drives the secondary shaft 8 to move downward, and the secondary shaft 8 presses and stores force on the strong spring 19. The secondary shaft 8 drives the abrasive roller 10 to move downward, and uses the downward force to press the coal blocks, and reduces the gap between the abrasive roller 10 and the abrasive mesh plate 11, thereby accelerating the grinding of the coal blocks into powder. When the position of the protruding rod 22 gradually staggers with the position of the protruding block 18, the strong spring 19 can control the secondary shaft 8 to move upward and reset, thereby controlling the connecting frame 9 to drive the abrasive roller 10 to move upward and reset, and the ground coal blocks are ground along the grinding wheel. The mesh holes of the material mesh plate 11 fall into the collecting trough 17, and the sealing door on the outside of the outer shell 1 is opened to clean the coal powder. The second motor 14 is powered on. The second motor 14 is a servo motor. Controlling the second motor 14 to rotate forward can drive the screw rod 15 to rotate, thereby controlling the block seat 12 connected by the outer thread to move downward. At this time, the block seat 12 slides on the slide rod 16 to ensure the vertical movement of the block seat 12. The upper end of the block seat 12 is gradually flush with the lower end of the abrasive mesh plate 11. The debris remaining on the abrasive mesh plate 11 can enter the block seat 12 and fall into the block cover 13 for discharge. Controlling the second motor 14 to reverse can drive the screw rod 15 to reverse, thereby controlling the block seat 12 to move up, and continue to enclose the edge of the abrasive mesh plate 11, so as to continue to grind the coal blocks. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A coal mill capable of adjusting workload, comprising an outer shell (1), characterized in that: The upper side of the outer shell (1) is connected to a feeding pipe (2), the outer side of the feeding pipe (2) is provided with a movable cover (4), the top of the inner side of the outer shell (1) is provided with an electric telescopic rod (3), and the output end of the electric telescopic rod (3) is connected to the movable cover (4); A fixed cover (5) is installed inside the outer shell (1), a first motor (6) is installed inside the fixed cover (5), an output end of the first motor (6) is connected to a main rotating shaft (7), an outer side of the main rotating shaft (7) is sleeved with a secondary rotating shaft (8), a lower end of the secondary rotating shaft (8) is connected to a connecting frame (9), and an abrasive roller (10) is installed at the lower end of the connecting frame (9); A protrusion (18) is installed on the top of the inner side of the fixed cover (5); An abrasive mesh plate (11) is installed on the inner wall of the outer shell (1), a baffle (13) is connected to the lower side of the inner part of the outer shell (1), a second motor (14) is installed inside the baffle (13), an output end of the second motor (14) is connected to a screw rod (15), an outer side of the screw rod (15) is threadedly connected to a baffle seat (12), a slide rod (16) passes through the baffle seat (12), and the lower end of the slide rod (16) is connected to the baffle seat (13); A collecting groove (17) is provided inside the lower section of the outer shell (1).

2. The coal mill capable of adjusting workload according to claim 1, characterized in that: A strong spring (19) is connected between the auxiliary rotating shaft (8) and the main rotating shaft (7); a limiting rod (20) is connected to the inner side of the upper end of the auxiliary rotating shaft (8); the limiting rod (20) passes through the main rotating shaft (7); a mounting plate (21) is installed on the outer side of the auxiliary rotating shaft (8); and a protruding rod (22) is connected to the end of the mounting plate (21).

3. The coal mill capable of adjusting workload according to claim 1, characterized in that: The movable cover (4) is slidably connected to the feeding pipe (2), the lower section of the movable cover (4) is distributed in an inclined shape, and the inclined surface of the movable cover (4) and the inclined surface of the fixed cover (5) are distributed parallel to each other.

4. The coal mill capable of adjusting workload according to claim 2, characterized in that: The auxiliary rotating shaft (8) and the limiting rod (20) can both slide on the main rotating shaft (7), and the main rotating shaft (7) is a "U"-shaped structure.

5. The coal mill capable of adjusting workload according to claim 1, characterized in that: The outer surface of the abrasive roller (10) is rough, and the opposing surfaces of the abrasive roller (10) and the abrasive mesh plate (11) are both inclined.

6. The coal mill capable of adjusting workload according to claim 1, characterized in that: The convex block (18) is a trapezoidal structure, and the position of the convex block (18) and the position of the convex rod (22) are arranged to correspond to each other.

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