Coal mine crushing device for thermal power generation

Abstract

The utility model relates to the technical field of thermal power generation, in particular to a coal mine crushing device for thermal power generation, which can effectively prevent coal briquettes from blocking the interior of a crusher due to incomplete crushing of the coal briquettes. Coal briquettes can be ground into powder at the pipe orifice of the powder grinding working cavity under the rotation of the powder grinding threaded roller, the powder falls down to the upper end face of the conveying outer belt, and under the rotation of the conveying outer belt, the coal powder can be uniformly spread on the upper surface of the conveying outer belt under the limiting and spreading of the coal powder spreading plate and then is conveyed to the outside; according to the coal pulverizing device, coal briquettes can be evenly pulverized, the coal briquettes are sequentially pulverized in a three-layer mode in batches, the situation that the coal briquettes are not completely pulverized can be effectively avoided, and meanwhile, due to the continuous rotation design of the pulverizing threaded rollers, the pulverizing efficiency is improved. And the situation that the pulverized coal manufacturing work is stopped due to the fact that the pulverizing working cavity is blocked by the coal briquettes can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal power generation, in particular to a coal mine crushing device for thermal power generation. Background Art

[0002] The coal-fired boilers of thermal power plants are usually connected to coal pulverizers, which crush the coal input from the outside and then send it into the coal-fired boiler for combustion and power generation. Since the coal pulverizer can crush the coal, the powdered coal expands the contact area with the air, allowing it to burn quickly and improve combustion efficiency.

[0003] In the coal crushing process, due to the large size of the coal blocks themselves, some coal blocks cannot be completely ground into coal powder if the crushing work is carried out directly, which can easily cause blockage problems. In addition, since the crusher is usually closed, these coal blocks are difficult to remove, resulting in a certain amount of waste of coal mine resources. Summary of the invention

[0004] The purpose of the utility model is to provide a coal mine crushing device for thermal power generation, which is used to overcome the above-mentioned defects in the prior art.

[0005] According to the utility model, a coal mine crushing device for thermal power generation comprises a machine body, a fixed base frame is fixedly arranged on the lower end surface of the machine body, a transmission outer belt is rotatably arranged in the fixed base frame, and the right end surface of the transmission outer belt is connected to an external transmission belt;

[0006] A grinding chamber is arranged in the machine body, an upper grinding chamber is connected to the lower wall of the grinding chamber, and a grinding working chamber connected up and down is arranged on the lower wall of the upper grinding chamber.

[0007] In some embodiments, a crushing motor is fixedly provided on the upper end surface of the machine body, an upper crushing roller is rotatably provided on the upper end surface of the machine body, and the upper end surface of the upper crushing roller is dynamically connected to the crushing motor.

[0008] In some embodiments, a coal powder paving plate is fixedly provided on the upper end surface of the fixed base frame, and the coal powder paving plate can spread the coal powder on the upper surface of the outer conveyor belt.

[0009] In some embodiments, a grinding thread roller is rotated in the grinding working chamber, the upper end surface of the grinding thread roller is fixedly connected to the lower end surface of the crushing upper roller, a certain gap is left between the grinding thread roller and the pipe opening of the lower wall of the grinding working chamber, and the outer cylindrical surface is a threaded structure.

[0010] In some embodiments, two preheating plates are fixedly provided on the left and right walls of the crushing chamber, and the preheating plates can be heated to preliminarily preheat the coal blocks to remove moisture from the coal blocks.

[0011] In some embodiments, two internal crushing rollers are rotatably provided in the upper grinding chamber, two side motors are symmetrically and fixedly provided on the right end surface of the machine body, and the right end surface of the internal crushing roller is dynamically connected to the side motor.

[0012] In some embodiments, a control panel is fixedly provided on the front end surface of the fixed base frame, and the control panel can control the start and stop of all motors and pumps of the utility model.

[0013] Compared with the prior art, the advantages of the utility model are:

[0014] 1. The utility model can grind the coal blocks into powder at the pipe mouth of the grinding working chamber through the conical design of the grinding working chamber and the rotation of the grinding threaded roller, and the powder falls downward to the upper end surface of the transmission outer belt. Under the rotation of the transmission outer belt, the coal powder can be evenly spread on the upper surface of the transmission outer belt under the limited flatness of the coal powder paving plate and then transported to the outside. The utility model can evenly crush the coal blocks and crush the coal blocks in batches in three layers in sequence, which can effectively avoid the situation of incomplete crushing of the coal blocks. At the same time, the continuous rotation design of the grinding threaded roller can prevent the grinding working chamber from being blocked by coal blocks, resulting in the situation that the coal powder production work stops. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the front view of the utility model;

[0016] Figure 2 It is a top view of the utility model;

[0017] Figure 3 It is a right view of the utility model;

[0018] Figure 4 It is a left view of the utility model;

[0019] Figure 5 The utility model is a schematic diagram of the overall structure of a coal mine crushing device for thermal power generation.

[0020] In the figure:

[0021] 11. Machine body; 12. Grinding chamber; 13. Grinding upper roller; 14. Grinding motor; 15. Transmission outer belt; 16. Fixed base frame; 17. Control panel; 18. Coal powder spreading plate; 19. Side motor; 20. Internal grinding roller; 21. Grinding threaded roller; 22. Grinding upper chamber; 23. Grinding working chamber; 24. Preheating plate. Implementation

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0023] See also Figure 1-Figure 5 , which is the first embodiment of the utility model, and provides an embodiment of a coal mine crushing device for thermal power generation, including a body 11, a fixed base frame 16 is fixedly provided on the lower end surface of the body 11, a transmission outer belt 15 is rotatably provided inside the fixed base frame 16, and the right end surface of the transmission outer belt 15 is connected to an external transmission belt;

[0024] A grinding chamber 12 is provided in the machine body 11 , and an upper grinding chamber 22 is connected to the lower wall of the grinding chamber 12 . A grinding working chamber 23 connected up and down is provided on the lower wall of the upper grinding chamber 22 .

[0025] A pulverizing motor 14 is fixedly disposed on the upper end surface of the machine body 11 , and an upper pulverizing roller 13 is rotatably disposed on the upper end surface of the machine body 11 . The upper end surface of the upper pulverizing roller 13 is dynamically connected to the pulverizing motor 14 .

[0026] A coal powder spreading plate 18 is fixedly provided on the upper end surface of the fixed base frame 16 , and the coal powder spreading plate 18 can spread the coal powder on the upper surface of the outer transmission belt 15 .

[0027] A grinding thread roller 21 is rotatably provided in the grinding working chamber 23, the upper end surface of the grinding thread roller 21 is fixedly connected to the lower end surface of the crushing upper roller 13, a certain gap is left between the grinding thread roller 21 and the lower wall pipe opening of the grinding working chamber 23, and the outer circumferential surface is a threaded structure.

[0028] Two preheating plates 24 are fixedly provided on the left and right walls of the pulverizing chamber 12. The preheating plates 24 can be heated to preheat the coal blocks and remove moisture from the coal blocks.

[0029] Two internal crushing rollers 20 are rotatably disposed in the grinding upper chamber 22 , and two side motors 19 are symmetrically and fixedly disposed on the right end surface of the machine body 11 , and the right end surface of the internal crushing roller 20 is dynamically connected to the side motor 19 .

[0030] A control panel 17 is fixedly disposed on the front end surface of the fixed base frame 16 , and the control panel 17 can control the start and stop of all motors and pumps of the utility model.

[0031] When coal powder production is required, after the worker places the coal block in the crushing chamber 12, the crushing motor 14 is started to drive the upper crushing roller 13 to start rotating. The larger coal in the crushing chamber 12 is initially crushed under the rotation of the upper crushing roller 13. Then the side motor 19 is started to drive the internal crushing roller 20 to rotate. After the coal block crushed in the crushing chamber 12 enters the upper grinding chamber 22, it can be crushed for the second time under the rotation of the internal crushing roller 20, thereby further reducing the volume of the coal block. After the coal block enters the grinding working chamber 23 under the influence of gravity, due to the conical design of the grinding working chamber 23, The rotation of the grinding threaded roller 21 can grind the coal blocks into powder at the pipe mouth of the grinding working chamber 23, and drop downward to the upper end surface of the transmission outer belt 15. Under the rotation of the transmission outer belt 15, the coal powder can be evenly spread on the upper surface of the transmission outer belt 15 under the limited flat paving of the coal powder paving plate 18, and then transported to the outside. The utility model can evenly crush the coal blocks, and can effectively avoid incomplete crushing of the coal blocks by crushing the coal blocks in batches in three layers. At the same time, the continuous rotation design of the grinding threaded roller 21 can prevent the grinding working chamber 23 from being blocked by coal blocks, resulting in the cessation of coal powder production.

[0032] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A coal crushing device for thermal power generation, comprising a body (11), characterized in that: A fixed base frame (16) is fixedly disposed on the lower end surface of the machine body (11), a transmission outer belt (15) is rotatably disposed inside the fixed base frame (16), and a right end surface of the transmission outer belt (15) is connected to an external transmission belt; A grinding chamber (12) is provided in the machine body (11), the lower wall of the grinding chamber (12) is connected to an upper grinding chamber (22), and the lower wall of the upper grinding chamber (22) is provided with a grinding working chamber (23) connected up and down.

2. A coal crushing device for thermal power generation according to claim 1, characterized in that: A pulverizing motor (14) is fixedly provided on the upper end surface of the machine body (11), an upper pulverizing roller (13) is rotatably provided on the upper end surface of the machine body (11), and the upper end surface of the upper pulverizing roller (13) is dynamically connected to the pulverizing motor (14).

3. A coal crushing device for thermal power generation according to claim 1, characterized in that: A coal powder spreading plate (18) is fixedly provided on the upper end surface of the fixed base frame (16), and the coal powder spreading plate (18) is capable of spreading coal powder on the upper surface of the outer transmission belt (15).

4. A coal crushing device for thermal power generation according to claim 2, characterized in that: A grinding thread roller (21) is rotatably disposed in the grinding working chamber (23), and the upper end surface of the grinding thread roller (21) is fixedly connected to the lower end surface of the pulverizing upper roller (13).

5. A coal crushing device for thermal power generation according to claim 1, characterized in that: Two preheating plates (24) are fixedly provided on the left and right walls of the pulverizing chamber (12).

6. A coal crushing device for thermal power generation according to claim 1, characterized in that: Two internal crushing rollers (20) are rotatably disposed in the grinding upper chamber (22), and two side motors (19) are fixedly disposed symmetrically in the front and rear directions on the right end surface of the machine body (11), and the right end surface of the internal crushing roller (20) is dynamically connected to the side motor (19).

7. A coal crushing device for thermal power generation according to claim 1, characterized in that: A control panel (17) is fixedly provided on the front end surface of the fixed base frame (16).

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