Coal crushing device for thermal power generation

Abstract

The utility model relates to the technical field of thermal power generation, in particular to a coal crushing device for thermal power generation. Comprising a box body, a cylinder is fixedly arranged in the box body, an outlet is formed in the bottom of the cylinder, a mounting cavity is formed in the cylinder, the mounting cavity communicates with the interior of the outlet, an arc-shaped plate is slidably arranged in the mounting cavity, and a plurality of leakage grooves are transversely formed in the arc-shaped plate in an array mode; and two cleaning blocks are arranged in the leakage groove in a sliding manner. After coal briquettes crushed by the crushing blades fall on the arc-shaped plate, the arc-shaped plate screens the coal briquettes through the leakage grooves, the coal briquettes which do not pass through the leakage grooves can be crushed again by the crushing blades until all the coal briquettes are discharged out of the box body through the leakage grooves, so that the crushing quality of the coal briquettes is improved, and the arc-shaped plate rotates in a reciprocating manner in the coal briquette screening process, so that the coal briquettes are sieved by the arc-shaped plate. And the cleaning block cleans the coal blocks blocked in the leakage groove, the leakage groove is prevented from being blocked by the coal blocks, and the screening efficiency of the arc-shaped plate on the coal blocks is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of thermal power generation technology, and more specifically, to a coal crushing device for thermal power generation. Background Technology

[0002] Thermal power generation is a method of generating electricity by converting the heat energy produced when combustible materials burn into electrical energy through power generation equipment. China has abundant coal resources, and coal is the main combustible material for thermal power generation. Before combustion, large pieces of coal need to be broken into smaller pieces, as smaller pieces of coal have higher combustion efficiency.

[0003] Existing thermal power plants use coal crushers to crush large pieces of coal. Large pieces of coal are fed into the crusher and crushed by the crushing blades. The crushed coal is discharged after passing through a screen plate. Coal that is not completely crushed remains in the bin for further crushing. However, the incompletely crushed coal tends to accumulate on the screen plate, making it difficult for the crushing blades to crush it again. The coal accumulated on the screen plate can also easily clog the screen mesh, resulting in a decrease in the screening efficiency of the screen plate. In view of this, we propose a coal crushing device for thermal power plants. Summary of the Invention

[0004] The purpose of this invention is to provide a coal crushing device for thermal power generation to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, one objective of this utility model is to provide a coal crushing device for thermal power generation, comprising a housing, inside which a cylinder is fixedly installed. An outlet is opened at the bottom of the cylinder, and an installation cavity is opened inside the cylinder, communicating with the outlet. An arc-shaped plate is slidably installed inside the installation cavity. Several slots are horizontally arrayed on the arc-shaped plate, and two cleaning blocks are slidably installed inside each slot. The two cleaning blocks are respectively located on both sides of the outlet and are fixedly positioned inside the installation cavity near the outlet. A reciprocating rotation mechanism is provided on the arc-shaped plate. A rotating shaft is rotatably installed inside the housing, and several crushing blades are fixedly connected to the circumferential sidewall of the rotating shaft. The crushing blades are located inside the cylinder. A motor is provided at one end of the rotating shaft to drive its rotation. When the output shaft of the motor drives the rotating shaft to rotate, the rotating shaft drives the reciprocating rotation mechanism to rotate reciprocally, causing the reciprocating rotation mechanism to drive the arc-shaped plate to rotate reciprocally inside the installation cavity.

[0006] As a further improvement to this technical solution, a feeding hopper is fixedly connected to the top of the box body, the lower end of the feeding hopper is fixedly mounted on the cylinder, and the inside of the feeding hopper and the cylinder are connected. A discharge pipe is fixedly connected to the bottom of the box body, and the discharge pipe is connected to the inside of the outlet.

[0007] As a further improvement to this technical solution, the side wall of the cylinder is provided with a movable groove, which communicates with the interior of the mounting cavity. A slider is slidably arranged inside the movable groove. One end of the slider is fixedly arranged on the outer arc surface of the arc plate. The reciprocating rotation mechanism includes an arc rack fixedly arranged at the other end of the slider. A transmission rod is rotatably arranged inside the housing. A first gear is fixedly connected to the circumferential side wall of the transmission rod. The first gear meshes with the arc rack. A transmission assembly is provided on the transmission rod, which is used to drive the transmission rod to reciprocate.

[0008] As a further improvement to this technical solution, one end of the transmission rod passes through the housing and is fixedly provided with a second gear. The transmission assembly includes an eccentric wheel fixedly connected to the rotating shaft. A sleeve is slidably sleeved on the eccentric wheel. A horizontal rack is fixedly connected to one side of the sleeve, and the horizontal rack meshes with the second gear.

[0009] As a further improvement to this technical solution, an extension rod is fixedly connected to the side of the sleeve frame away from the transverse rack, and a guide sleeve is slidably sleeved on the extension rod, and the guide sleeve is fixedly installed on the side wall of the box.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] In this coal crushing device for thermal power generation, after the coal blocks are crushed by the crushing blades fall onto the arc-shaped plate, the arc-shaped plate screens the coal blocks through a trough. Coal blocks that do not pass through the trough are carried to a higher position by the rotating crushing blades, and then fall back onto the crushing blades under gravity for further crushing until all coal blocks are discharged from the box through the trough, thereby improving the crushing quality of the coal blocks. During the screening process, the arc-shaped plate reciprocates, causing the cleaning block to clear the coal blocks blocking the trough, preventing the trough from being blocked by coal blocks and ensuring the screening efficiency of the arc-shaped plate. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is one of the cross-sectional views of the overall structure of this utility model;

[0014] Figure 3 For the present utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0015] Figure 4 This is a second sectional view of the overall structure of this utility model;

[0016] Figure 5 This is an exploded view of a partial structure of the present invention;

[0017] Figure 6 This is a schematic diagram of the installation structure of the arc-shaped plate, slider, and arc-shaped rack of this utility model;

[0018] Figure 7 This is a schematic diagram of the reciprocating rotation mechanism of this utility model.

[0019] The meanings of the labels in the diagram are as follows:

[0020] 1. Box body; 11. Feed hopper; 12. Discharge pipe;

[0021] 2. Cylindrical tube; 21. Mounting cavity; 22. Outlet; 23. Cleaning block; 24. Movable groove;

[0022] 3. Curved plate; 31. Slot; 32. Curved rack; 33. Transmission rod; 34. First gear; 35. Second gear; 36. Slider;

[0023] 4. Shaft; 5. Crushing blades; 6. Motor;

[0024] 7. Transmission assembly; 71. Eccentric wheel; 72. Sleeve frame; 73. Extension rod; 74. Guide sleeve; 75. Horizontal rack. Detailed Implementation

[0025] 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. Example

[0026] Please see Figures 1-7As shown, one of the objectives of this embodiment is to provide a coal crushing device for thermal power generation, including a housing 1. A cylinder 2 is fixedly installed inside the housing 1. An outlet 22 is opened at the bottom of the cylinder 2. A feed hopper 11 is fixedly connected to the top of the housing 1. The lower end of the feed hopper 11 is fixedly installed on the cylinder 2, and the feed hopper 11 and the interior of the cylinder 2 are connected. A discharge pipe 12 is fixedly connected to the bottom of the housing 1. The discharge pipe 12 is connected to the interior of the outlet 22. A rotating shaft 4 is rotatably installed inside the housing 1. A plurality of crushing blades 5 are fixedly connected to the circumferential side wall of the rotating shaft 4. The crushing blades 5 are installed inside the cylinder 2. A motor 6 is installed at one end of the rotating shaft 4 to drive the rotating shaft 4 to rotate. After the motor 6 starts, its output shaft drives the rotating shaft 4 to rotate. The rotating shaft 4 drives several crushing blades 5 to rotate synchronously. After the worker pours the coal into the cylinder 2 through the feed hopper 11, the coal collides with the rotating crushing blades 5 and is crushed. The crushed coal is first discharged from the cylinder 2 through the outlet 22, and then discharged from the box 1 through the discharge pipe 12. In this way, the larger coal lumps are crushed into smaller coal lumps, thereby improving the combustion efficiency of the coal when burning coal.

[0027] Even after being crushed by the crusher blade 5, some coal chunks still retain a relatively large volume. This larger volume, mixed with smaller chunks, reduces the overall combustion efficiency. To address this, an installation cavity 21 is provided inside the cylinder 2, connected to the outlet 22. An arc-shaped plate 3 is slidably mounted inside the installation cavity 21, which has the same curvature as the plate 3. The arc-shaped plate 3 can reciprocate within the installation cavity 21. Several slots 31 are arranged horizontally on the arc-shaped plate 3. The arc-shaped plate 3 blocks the outlet 22, and the coal chunks crushed by the crusher blade 5 fall onto the arc-shaped plate 3. Smaller coal chunks fall through the chute 31 to the outside of the housing 1. Larger coal chunks, unable to pass through the chute 31, remain inside the cylinder 2. These larger coal chunks are carried to a higher position by the rotating crushing blade 5 and then fall back onto the crushing blade 5 under gravity for further crushing. If the crushed coal chunks can be discharged from the cylinder 2 through the chute 31, they meet the usage requirements. If the coal chunks cannot pass through the chute 31, the above process is repeated until all the coal chunks inside the cylinder 2 are discharged from the cylinder 2 through the chute 31, thus completely crushing the larger coal chunks into smaller ones and improving the overall combustion efficiency of the coal.

[0028] The trough 31 on the arc-shaped plate 3 is easily clogged by coal blocks during screening, resulting in a decrease in the screening efficiency of the trough 31. To solve this problem, refer to... Figure 3Two cleaning blocks 23 are slidably arranged inside the trough 31. The two cleaning blocks 23 are respectively arranged on both sides of the outlet 22, and the cleaning blocks 23 are fixedly arranged inside the installation cavity 21 near the outlet 22. A reciprocating rotation mechanism is provided on the arc plate 3. When the output shaft of the motor 6 drives the rotating shaft 4 to rotate, the rotating shaft 4 drives the reciprocating rotation mechanism to rotate back and forth, so that the reciprocating rotation mechanism drives the arc plate 3 to rotate back and forth inside the installation cavity 21. When the arc plate 3 rotates back and forth, the trough 31 and the cleaning blocks 23 move relative to each other. The cleaning blocks 23 clean out the coal blocks blocking the inside of the trough 31, so that the cleaned coal blocks either fall directly to the outside of the box 1 or enter the inside of the cylinder 2 for further crushing, thereby preventing the trough 31 from being blocked by coal blocks, which would reduce the screening efficiency of the arc plate 3.

[0029] To enable the arc-shaped plate 3 to reciprocate within the mounting cavity 21, the structure of the reciprocating rotation mechanism is detailed below, referring to... Figure 5 and Figure 6 The cylinder 2 has a movable groove 24 on its side wall, which is connected to the interior of the mounting cavity 21. A slider 36 is slidably arranged inside the movable groove 24. One end of the slider 36 is fixedly arranged on the outer arc surface of the arc plate 3. The reciprocating rotation mechanism includes an arc rack 32 fixedly arranged on the other end of the slider 36. A transmission rod 33 is rotatably arranged inside the housing 1. A first gear 34 is fixedly connected to the circumferential side wall of the transmission rod 33. The first gear 34 meshes with the arc rack 32. A transmission assembly 7 is arranged on the transmission rod 33. The transmission assembly 7 is used to drive the transmission rod 33 to reciprocate. When the transmission rod 33 drives the first gear 34 to reciprocate, the first gear 34 meshes with the arc rack 32, causing the arc rack 32 to drive the arc plate 3 to reciprocate through the slider 36. This, in turn, cleans the coal blockage inside the trough 31 through the cleaning block 23.

[0030] The structure of transmission component 7 is described in detail below, with reference to... Figure 7One end of the transmission rod 33 passes through the housing 1 and is fixedly mounted with a second gear 35. The transmission assembly 7 includes an eccentric wheel 71 fixedly connected to the rotating shaft 4. A sleeve frame 72 is slidably fitted on the eccentric wheel 71. A horizontal rack 75 is fixedly connected to one side of the sleeve frame 72, and the horizontal rack 75 meshes with the second gear 35. An extension rod 73 is fixedly connected to the side of the sleeve frame 72 away from the horizontal rack 75. A guide sleeve 74 is slidably fitted on the extension rod 73. The guide sleeve 74 is fixedly mounted on the side wall of the housing 1. The guide sleeve 74 and the extension rod 73 cooperate to restrict the movement of the sleeve frame 72. The path allows the frame 72 to move horizontally only along the axis of the extension rod 73. When the output shaft of the motor 6 drives the eccentric wheel 71 to rotate, the rotating eccentric wheel 71 pushes the inner wall of the frame 72, causing the frame 72, extension rod 73 and horizontal rack 75 to move horizontally back and forth. Through the meshing transmission of the horizontal rack 75 and the second gear 35, the second gear 35 drives the transmission rod 33 to rotate back and forth, thereby causing the arc plate 3 to rotate back and forth inside the mounting cavity 21. The cleaning block 23 cleans the coal blocks blocking the trough 31, ensuring the screening efficiency of the arc plate 3 for coal blocks.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A coal-crushing device for thermal power generation, comprising a housing (1), characterized in that: A cylinder (2) is fixedly installed inside the housing (1). An outlet (22) is opened at the bottom of the cylinder (2). An installation cavity (21) is opened inside the cylinder (2). The installation cavity (21) is connected to the inside of the outlet (22). An arc-shaped plate (3) is slidably installed inside the installation cavity (21). Several drainage grooves (31) are horizontally arrayed on the arc-shaped plate (3). Two cleaning blocks (23) are slidably installed inside the drainage grooves (31). The two cleaning blocks (23) are respectively located on both sides of the outlet (22), and the cleaning blocks (23) are fixedly installed in the installation cavity (1). 21) The arc plate (3) is equipped with a reciprocating rotation mechanism near the outlet (22). The box (1) is equipped with a rotating shaft (4). Several crushing blades (5) are fixedly connected to the circumferential side wall of the rotating shaft (4). The crushing blades (5) are located inside the cylinder (2). One end of the rotating shaft (4) is equipped with a motor (6) for driving the rotating shaft (4) to rotate. When the output shaft of the motor (6) drives the rotating shaft (4) to rotate, the rotating shaft (4) drives the reciprocating rotation mechanism to rotate back and forth, so that the reciprocating rotation mechanism drives the arc plate (3) to rotate back and forth inside the mounting cavity (21).

2. The coal crushing device for thermal power generation according to claim 1, characterized in that: The top of the box (1) is fixedly connected to a feeding hopper (11), the lower end of the feeding hopper (11) is fixedly set on the cylinder (2), and the feeding hopper (11) and the inside of the cylinder (2) are connected. The bottom of the box (1) is fixedly connected to a discharge pipe (12), and the discharge pipe (12) is connected to the inside of the outlet (22).

3. The coal crushing device for thermal power generation according to claim 1, characterized in that: The side wall of the cylinder (2) is provided with a movable groove (24), which is connected to the interior of the mounting cavity (21). A slider (36) is slidably arranged inside the movable groove (24). One end of the slider (36) is fixedly arranged on the outer arc surface of the arc plate (3). The reciprocating rotation mechanism includes an arc rack (32) fixedly arranged on the other end of the slider (36). A transmission rod (33) is rotatably arranged inside the box (1). A first gear (34) is fixedly connected to the circumferential side wall of the transmission rod (33). The first gear (34) meshes with the arc rack (32). A transmission component (7) is provided on the transmission rod (33). The transmission component (7) is used to drive the transmission rod (33) to reciprocate.

4. The coal crushing device for thermal power generation according to claim 3, characterized in that: One end of the transmission rod (33) passes through the housing (1) and is fixedly provided with a second gear (35). The transmission assembly (7) includes an eccentric wheel (71) fixedly connected to the rotating shaft (4). A sleeve frame (72) is slidably sleeved on the eccentric wheel (71). A horizontal rack (75) is fixedly connected to one side of the sleeve frame (72). The horizontal rack (75) meshes with the second gear (35).

5. The coal crushing device for thermal power generation according to claim 4, characterized in that: An extension rod (73) is fixedly connected to the side of the sleeve frame (72) away from the horizontal rack (75). A guide sleeve (74) is slidably sleeved on the extension rod (73). The guide sleeve (74) is fixedly installed on the side wall of the box body (1).

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