Deslagging structure of low-speed steel ball coal mill

Abstract

The utility model provides a deslagging structure of a low-speed steel ball coal mill, which relates to the technical field of steel ball coal mills and comprises a deslagging pipeline and an exhaust fan, an ash removal pipe is sleeved on the outer side of the deslagging pipeline, a plurality of ash removal holes positioned in the ash removal pipe are uniformly arranged on the upper side of a pipe body of the deslagging pipeline, the exhaust fan is arranged at the tail end of the ash removal pipe, and the ash removal pipe is arranged in the ash removal pipe. The ash removal device comprises an ash removal pipe and ash removal holes formed in the ash removal pipe, a sliding groove distributed in the moving direction of coal cinder is formed in the inner side of the ash removal pipe, and a cleaning plate arranged on the ash removal pipe in a sleeving mode is arranged on the inner side of the ash removal pipe. The coal slag is driven by the spiral blade to rotate and roll in the slag discharging pipeline, and dust in the coal slag is sucked into the dust removing pipe through the dust removing holes after being raised and then discharged by the exhaust fan.

Description

Technical Field

[0001] This utility model relates to the technical field of ball mill coal mills, and in particular to a slag discharge structure for a low-speed ball mill coal mill. Background Technology

[0002] The ball mill is the main equipment in the coal powder preparation system of a thermal power plant. It is mainly used to grind coal of various hardnesses. Its function is to dry, crush and grind coal blocks of a certain size into coal powder for boiler combustion. When in use, it needs to use a slag discharge structure for slag discharge treatment.

[0003] Therefore, in the existing low-speed ball mill slag discharge structure, with publication number CN219024503U, the feed pipe is connected to the coal conveying pipe via a connecting plate, and the ball mill body performs coal grinding. Then, the slag is discharged into the slag discharge pipe through the discharge pipe. At this time, the slag in the slag discharge pipe is sent out by the feeding auger. The dust in the slag is sucked into the ash discharge pipe by the exhaust fan in the ash discharge box. Then, it is filtered by the detachable filter screen in the filter box.

[0004] The exhaust fan of the device is located on one side of the pipe. When the pipe is filled with coal ash, it greatly obstructs the airflow, causing the suction force generated by the exhaust fan to be greatly reduced when passing through the coal ash layer. As a result, the dust on the other side of the pipe and inside the coal ash is difficult to be effectively sucked into the exhaust fan and discharged. Utility Model Content

[0005] The purpose of this utility model is to solve the problems existing in the prior art, and to propose a slag discharge structure for a low-speed steel ball coal mill.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a slag discharge structure for a low-speed ball mill, comprising a slag discharge pipe and an exhaust fan, wherein an ash removal pipe is sleeved and installed on the outside of the slag discharge pipe, and a plurality of ash removal holes located inside the ash removal pipe are evenly opened on the upper side of the slag discharge pipe body, the exhaust fan is located at the tail end of the ash removal pipe, and a sliding groove distributed along the direction of coal slag movement is opened on the inner side of the ash removal pipe, a cleaning plate sleeved and installed on the inner side of the ash removal pipe, a slider is fixedly connected to the outside of the cleaning plate, the slider is slidably connected to the sliding groove, and a screw rod threadedly connected to the cleaning plate is rotatably connected to the inner side of the ash removal pipe.

[0007] Preferably, there are two lead screws that are symmetrically distributed.

[0008] Preferably, the outer side of the cleaning plate is slidably fitted with the inner side of the ash removal pipe, and the inner side of the cleaning plate is slidably fitted with the outer side of the slag discharge pipe.

[0009] Preferably, the cleaning plate has two coaxially arranged toothed rings rotatably connected to the side facing the exhaust fan, with the tooth surfaces of the two toothed rings facing each other. A gear located between and meshing with the two toothed rings is rotatably connected to the cleaning plate.

[0010] Preferably, a first motor is fixedly connected to the other side of the cleaning plate, the main shaft of the first motor passes through the cleaning plate and extends to the other side of the cleaning plate, and the through end of the main shaft of the first motor is fixed to a gear.

[0011] Preferably, a cleaning block that slides with the cleaning plate is fixedly connected to the outer side of the toothed ring with a larger radius, and a cleaning block that slides with the cleaning plate is also fixedly connected to the inner side of the toothed ring with a smaller radius.

[0012] Preferably, four sprockets arranged in a circular array are rotatably connected to one side of the ash removal pipe, wherein the middle of two opposing sprockets extends outward through the ash removal pipe and into the interior of the ash removal pipe, and the through ends of the two opposing sprockets are respectively fixed to two lead screws.

[0013] Preferably, the four sprockets are connected by a chain drive, and a second motor is fixedly connected to one end of the ash removal pipe, with the main shaft of the second motor fixed to one of the sprockets.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0015] 1. In this utility model, by setting an ash removal pipe sleeved on the outside of the slag discharge pipe and an ash removal hole on the slag discharge pipe, when the exhaust fan starts and forms a negative pressure, the slag is driven to rotate and tumble in the slag discharge pipe by the spiral blades. The dust inside is lifted and sucked into the ash removal pipe through the ash removal hole, and then discharged by the exhaust fan.

[0016] 2. In this utility model, by setting a cleaning plate that slides in cooperation with the slag discharge pipe and the ash removal pipe, as well as a lead screw, sprocket, chain and second motor that drive the cleaning plate to move, and a toothed ring, gear, cleaning block and first motor for cleaning the cleaning plate, the cleaning plate slides in the ash removal pipe along the direction of coal slag movement, scraping ash from the outside of the slag discharge pipe and the inside of the ash removal pipe, preventing coal slag and dust from adhering and accumulating, while the dust remaining on the cleaning plate can be automatically cleaned by the cooperation of the toothed ring and the cleaning block, ensuring the long-term stable operation of the device and reducing manual maintenance costs. Attached Figure Description

[0017] Figure 1 A three-dimensional structural diagram of the slag discharge structure of a low-speed ball mill is provided for this utility model.

[0018] Figure 2 In this utility model Figure 1 A side-section three-dimensional structural diagram;

[0019] Figure 3 This is a three-dimensional structural diagram of the ash removal hole in this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the exhaust fan in this utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of the toothed ring in this utility model.

[0022] Legend: 1. Slag discharge pipe; 2. Exhaust fan; 3. Ash removal pipe; 4. Second motor; 5. Sprocket; 6. Ash removal hole; 7. Cleaning plate; 8. Slide groove; 9. Gear ring; 10. Gear; 11. First motor; 12. Cleaning block; 13. Lead screw; 14. Sliding block. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0025] like Figure 1-5 As shown, a slag discharge structure for a low-speed ball mill includes a slag discharge pipe 1 and an exhaust fan 2. An ash removal pipe 3 is sleeved on the outside of the slag discharge pipe 1. Multiple ash removal holes 6 are evenly distributed on the upper side of the slag discharge pipe 1 and located inside the ash removal pipe 3. The exhaust fan 2 is located at the tail end of the ash removal pipe 3. A sliding groove 8 distributed along the direction of slag movement is opened on the inside of the ash removal pipe 3. A cleaning plate 7 is sleeved on the inside of the ash removal pipe 3 and installed with the slag discharge pipe 1. A slider 14 is fixedly connected to the outside of the cleaning plate 7 and is slidably connected to the sliding groove 8. Two screw rods 13 are rotatably connected to the inside of the ash removal pipe 3 and are threadedly connected to the cleaning plate 7. The outside of the cleaning plate 7 is slidably engaged with the inside of the ash removal pipe 3, and the inside of the cleaning plate 7 is slidably engaged with the outside of the slag discharge pipe 1.

[0026] In this technical solution, after the exhaust fan 2 is started, a negative pressure is formed in the ash removal pipe 3. The dust in the slag is then drawn into the ash removal pipe 3 through the ash removal holes 6 and discharged by the exhaust fan 2, achieving preliminary separation of slag and dust. Furthermore, through cooperation with the spiral blades in the slag discharge pipe 1, when the slag is rotated and tumbled by the spiral blades in the slag discharge pipe 1, the dust inside is dispersed and discharged by the exhaust fan 2 through the ash removal holes 6, thus improving the ash removal efficiency.

[0027] In addition, the cleaning plate 7 slides smoothly inside the ash removal pipe 3 along the direction of coal slag movement. During the movement, the cleaning plate 7 can scrape the ash from the outside of the slag discharge pipe 1 and the inside of the ash removal pipe 3 to prevent coal slag and dust from adhering and accumulating.

[0028] like Figure 2 and Figure 5 As shown, two coaxially arranged toothed rings 9 are rotatably connected to the side of the cleaning plate 7 facing the exhaust fan 2. The tooth surfaces of the two toothed rings 9 are arranged opposite each other. A gear 10 is rotatably connected to the cleaning plate 7, located between the two toothed rings 9 and meshing with them. A first motor 11 is fixedly connected to the other side of the cleaning plate 7. The main shaft of the first motor 11 passes through the cleaning plate 7 and extends to the other side of the cleaning plate 7. The through end of the main shaft of the first motor 11 is fixed to the gear 10. A cleaning block 12 that slides with the cleaning plate 7 is fixedly connected to the outer side of the toothed ring 9 with a larger radius. A cleaning block 12 that slides with the cleaning plate 7 is also fixedly connected to the inner side of the toothed ring 9 with a smaller radius.

[0029] In this technical solution, when the cleaning plate 7 slides to scrape away dust, dust will remain on the cleaning plate 7. Therefore, a cleaning block 12 is provided. When the first motor 11 is started, its main shaft drives the gear 10 to rotate. The rotation of the gear 10 drives the two gear rings 9 to rotate. By providing the cleaning block 12, it moves together with the gear rings 9 when they rotate. The cleaning block 12 on the gear ring 9 with the larger radius is used to scrape the outer edge of one side of the cleaning plate 7, and the cleaning block 12 on the gear ring 9 with the smaller radius is used to scrape the inner edge of one side of the cleaning plate 7.

[0030] like Figure 1 and Figure 3 As shown, four sprockets 5 arranged in a circular array are rotatably connected to one side of the ash removal pipe 3. Two opposing sprockets 5 extend outward from the middle, penetrating the ash removal pipe 3 and extending into the interior of the ash removal pipe 3. The penetrating ends of the two opposing sprockets 5 are respectively fixed to two lead screws 13. The four sprockets 5 are connected by a chain drive. A second motor 4 is fixedly connected to one end of the ash removal pipe 3. The main shaft of the second motor 4 is fixed to one of the sprockets 5.

[0031] In this technical solution, when the second motor 4 starts, its main shaft drives the sprocket 5 fixed to it to rotate. Since the four sprockets 5 are connected by chain transmission, the four sprockets 5 rotate simultaneously. Two of the sprockets 5 drive the lead screw 13 fixed to them to rotate. The rotation of the lead screw 13 will push the cleaning plate 7 to move linearly along the slide 8.

[0032] Working principle: The coal slag is driven by the spiral blades in the slag discharge pipe 1 to rotate, tumble and be conveyed forward in the pipe. After the exhaust fan 2 is started, a negative pressure is formed in the ash removal pipe 3. The dust in the coal slag is sucked into the ash removal pipe 3 through the ash removal hole 6 on the upper side of the slag discharge pipe 1, and then discharged by the exhaust fan 2, thus completing the separation of coal slag and dust.

[0033] The second motor 4 starts, and its main shaft drives the fixed sprocket 5 to rotate. The four sprockets 5 are connected by chain drive, so that the four sprockets 5 rotate synchronously. Two of the sprockets 5 drive the lead screw 13 to rotate. The lead screw 13 is threadedly connected to the cleaning plate 7, which pushes the cleaning plate 7 along the chute 8 and slides smoothly in the ash removal pipe 3 in the direction of coal slag movement. During the movement, the cleaning plate 7 scrapes the ash on the outside of the slag discharge pipe 1 and the inside of the ash removal pipe 3 to prevent coal slag and dust from adhering and accumulating.

[0034] The wiring diagrams of the first motor 11 and the second motor 4 in this utility model are common knowledge in the field. Their working principle is a well-known technology. The appropriate model is selected according to actual use. Therefore, the control method and wiring arrangement of the first motor 11 and the second motor 4 will not be explained in detail.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A slag discharge structure for a low-speed ball mill, comprising a slag discharge pipe (1) and an exhaust fan (2), characterized in that: A ash removal pipe (3) is sleeved on the outside of the slag discharge pipe (1). Multiple ash removal holes (6) are evenly opened on the upper side of the slag discharge pipe (1) and located inside the ash removal pipe (3). The exhaust fan (2) is set at the tail end of the ash removal pipe (3). A sliding groove (8) distributed along the direction of coal slag movement is opened on the inner side of the ash removal pipe (3). A cleaning plate (7) is sleeved on the inner side of the ash removal pipe (3) and installed with the slag discharge pipe (1). A slider (14) is fixedly connected to the outer side of the cleaning plate (7). The slider (14) is slidably connected to the sliding groove (8). A screw rod (13) is rotatably connected to the inner side of the ash removal pipe (3) and threadedly connected to the cleaning plate (7).

2. The deslagging structure of a low-speed steel ball mill according to claim 1, characterized in that: There are two lead screws (13) that are symmetrically distributed.

3. The deslagging structure of a low-speed steel ball mill according to claim 1, characterized in that: The outer side of the cleaning plate (7) is slidably fitted with the inner side of the ash removal pipe (3), and the inner side of the cleaning plate (7) is slidably fitted with the outer side of the slag discharge pipe (1).

4. The deslagging structure of a low-speed steel ball mill according to claim 1, characterized in that: The cleaning plate (7) facing the exhaust fan (2) is rotatably connected to two coaxially arranged toothed rings (9), with the tooth surfaces of the two toothed rings (9) facing each other. A gear (10) is rotatably connected to the cleaning plate (7) and located between the two toothed rings (9) and meshing with the two toothed rings (9).

5. The deslagging structure of a low-speed steel ball mill according to claim 4, characterized in that: A first motor (11) is fixedly connected to the other side of the cleaning plate (7). The main shaft of the first motor (11) passes through the cleaning plate (7) and extends to the other side of the cleaning plate (7). The through end of the main shaft of the first motor (11) is fixed to the gear (10).

6. The deslagging structure of a low-speed steel ball mill according to claim 5, characterized in that: A cleaning block (12) that slides with the cleaning plate (7) is fixedly connected to the outer side of the toothed ring (9) with a larger radius, and a cleaning block (12) that slides with the cleaning plate (7) is also fixedly connected to the inner side of the toothed ring (9) with a smaller radius.

7. The deslagging structure of a low-speed steel ball mill according to claim 1, characterized in that: The ash removal pipe (3) is rotatably connected to four sprockets (5) arranged in a ring array on one side. Two opposing sprockets (5) extend outward from the middle, penetrate the ash removal pipe (3) and extend into the interior of the ash removal pipe (3). The penetration ends of the two opposing sprockets (5) are respectively fixed to two lead screws (13).

8. The deslagging structure of a low-speed steel ball mill according to claim 7, characterized in that: Four sprockets (5) are connected by a chain drive. One end of the ash removal pipe (3) is fixedly connected to a second motor (4), and the main shaft of the second motor (4) is fixed to one of the sprockets (5).

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