Grinding roller device of medium-speed coal mill

Abstract

The utility model provides a grinding roller device of a medium-speed coal mill, which relates to the technical field of grinding rollers of coal mills and comprises a shell and two symmetrically arranged grinding rollers, swing seats capable of swinging up and down are hinged to equal-height positions of inner walls of two sides of the shell, the two grinding rollers are respectively mounted on swing edges of the two swing seats, and the two swing seats are hinged to the shell. The middle of the swing seat is rotationally connected with an electric push rod hinged to the inner wall of the shell, a feeding port is formed in the top edge in the shell, and a scanner is fixedly installed around the feeding port. The scanner and the electric push rod are arranged, and the scanner is used for scanning the size and size of coal briquettes passing through the feeding port; and according to scanned data, the electric push rod stretches out and draws back to realize up-down swinging of the swinging seat, so that the distance between the two grinding rollers is automatically and quickly adjusted.

Description

Technical Field

[0001] This utility model relates to the field of coal mill grinding roller technology, and in particular to a medium-speed coal mill grinding roller device. Background Technology

[0002] The grinding rollers of a coal mill are one of the key components of a coal mill, mainly used to grind coal into pulverized coal to meet the needs of boiler combustion or other industrial processes. For example, a grinding roller device for a coal mill, with the publication number CN215878137U, uses two threaded sleeves to rotate, driving two lead screws to move up and down, which in turn drives the corresponding connecting blocks to move up and down. The up and down movement of the two connecting blocks drives the two grinding rollers to move in a fan-shaped motion around the rotating seat position, thereby adjusting the distance between them. The coal or pulverized coal to be ground is placed inside the feed nozzle, and the coal or pulverized coal is discharged into the U-shaped cover through the feed nozzle, falling between the two grinding rollers. The relative rotation of the two grinding rollers can crush and grind the coal or pulverized coal.

[0003] However, since the coal pieces are of varying sizes, the threaded sleeve needs to be rotated continuously during actual use to allow the lead screw to drive the corresponding grinding rollers to rise and fall and adjust the spacing via the connecting components, which is quite troublesome. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art and to propose a grinding roller device for a medium-speed coal mill.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a medium-speed coal mill grinding roller device, comprising a housing and two symmetrically arranged grinding rollers. Swing seats that swing up and down are hinged at the same height on both sides of the inner wall of the housing. The two grinding rollers are respectively installed on the swing sides of the two swing seats. An electric push rod hinged to the inner wall of the housing is rotatably connected to the middle of the swing seat. A feeding port is opened on the top inner side of the housing, and a scanner is fixedly installed around the feeding port. A baffle plate penetrating the side of the housing is fixedly installed on the top edge of the swing side of the swing seat. The side of the baffle plate is slidably connected to both ends of the grinding rollers, and a roller that is rotatably connected to the surface of the grinding rollers is also rotatably connected to the side of the baffle plate.

[0006] Preferably, the outer casing has a through groove on its side that is slidably connected to the baffle, and the center of the through groove and the baffle is located on the rotation axis of the swing seat.

[0007] Preferably, an inclined plate is fixedly installed inside the housing near the bottom, and a discharge port located on the lower side of the inclined plate is provided on the side of the housing.

[0008] Preferably, elastic cloths are installed inside the housing at both ends of the grinding roller, and the two elastic cloths are located between the two baffles and are fixedly installed on the opposite sides of the two baffles.

[0009] Preferably, two symmetrically arranged screen plates are slidably installed inside the housing near the bottom, with the two screen plates located below the two grinding rollers and the upper surface of the screen plates being concave.

[0010] Preferably, an arc-shaped shell is fixedly installed in the recessed part of the sieve plate, the surface of the arc-shaped shell and the surface of the sieve plate have sieve holes of the same diameter, and the inner wall of the arc-shaped shell is slidably connected to the surface of the grinding roller.

[0011] Preferably, an electric telescopic rod is fixedly installed at each of the four corners of the bottom of the outer shell, and the telescopic end of the electric telescopic rod is vertically upward and fixedly connected to the bottom surface of the sieve plate.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, by setting up a scanner and an electric push rod, the scanner scans the size and dimensions of the coal blocks passing through the feeding port, and the electric push rod is used to extend and retract to make the swing seat swing up and down according to the scanned data, thereby automatically and quickly adjusting the distance between the two grinding rollers.

[0014] 2. In this utility model, the coal powder is screened by setting a sieve plate. The qualified coal powder falls onto the inclined plate, but the unqualified coal powder or small coal lumps will slide along the surface of the sieve plate into the arc-shaped shell for collection. The sieve plate rises until the grinding roller enters the arc-shaped shell, so that the coal lumps collected in the arc-shaped shell are ground a second time until they are qualified and pass through the sieve plate. Attached Figure Description

[0015] Figure 1 This utility model provides a three-dimensional structural schematic diagram of a grinding roller device for a medium-speed coal mill;

[0016] Figure 2 This utility model proposes a grinding roller device for a medium-speed coal mill. Figure 1 A schematic diagram of the cross-sectional structure;

[0017] Figure 3 This utility model proposes a grinding roller device for a medium-speed coal mill. Figure 2 A schematic diagram of the cross-sectional structure;

[0018] Figure 4 for Figure 1 A bottom view.

[0019] Legend: 1. Outer shell; 2. Baffle; 3. Feed port; 4. Discharge port; 5. Electric telescopic rod; 6. Inclined plate; 7. Swing seat; 8. Electric push rod; 9. Roller; 10. Scanner; 11. Grinding roller; 12. Screen plate; 13. Arc-shaped shell; 14. Through groove; 15. Elastic cloth. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] like Figures 1-4 As shown, a medium-speed coal mill grinding roller device includes a housing 1 and two symmetrically arranged grinding rollers 11. Swing seats 7, which swing up and down, are hinged to the inner walls of both sides of the housing 1 at the same height. The two grinding rollers 11 are respectively mounted on the swing sides of the two swing seats 7. In actual use, the grinding rollers 11 are driven to rotate by installing commercially available servo motors on the swing seats 7. An electric push rod 8, hinged to the inner wall of the housing 1, is rotatably connected to the middle of the swing seat 7. The extension and retraction of the electric push rod 8 enables the swing seat 7 to swing up and down, thereby adjusting the distance between the two grinding rollers 11. A feeding port 3 is opened on the top edge of the inner wall of the housing 1, and a scanner 10 is fixedly installed around the feeding port 3. The scanner 10 scans the size and dimensions of the coal blocks passing through the feeding port 3, and, combined with commercially available related equipment and technologies, enables the electric push rod 8 to extend and retract according to the data scanned by the scanner 10. A through-hole is fixedly installed on the top edge of the swing side of the swing seat 7. A side baffle 2 is provided on the side of the housing 1. The side of the baffle 2 is slidably connected to both ends of the grinding roller 11, and a roller 9 is rotatably connected to the side of the baffle 2 and is slidably connected to the roller surface of the grinding roller 11. A through groove 14 is provided on the side of the housing 1 and is slidably connected to the baffle 2. The center of the through groove 14 and the baffle 2 is located on the rotation axis of the swing seat 7, which can ensure that the baffle 2 slides smoothly in the through groove 14 as the swing seat 7 swings. The baffle 2 can also ensure that the coal blocks passing through the feed port 3 do not have to pass only between the two grinding rollers 11. Therefore, elastic cloth 15 is installed at both ends of the grinding roller 11 inside the housing 1. The two elastic cloths 15 are located between the two baffles 2 and are fixedly installed on the opposite sides of the two baffles 2. When the gap between the two baffles 2 increases in the area other than the grinding roller 11 due to the swing of the swing seat 7, the gap between the two baffles 2 is sealed by the elastic expansion and contraction of the installed elastic cloth 15.

[0023] Additionally: An inclined plate 6 is fixedly installed inside the outer casing 1 near the bottom, and a discharge port 4 located on the lower side of the inclined plate 6 is provided on the side of the outer casing 1, which can ensure that qualified coal powder slides down the surface of the inclined plate 6 and is discharged through the discharge port 4.

[0024] Furthermore: Two symmetrically arranged sieve plates 12 are slidably installed near the bottom of the outer casing 1. The two sieve plates 12 are located below the two grinding rollers 11, and the upper surface of the sieve plates 12 is concave. An arc-shaped shell 13 is fixedly installed in the concave part of the sieve plate 12. The surface of the arc-shaped shell 13 and the surface of the sieve plate 12 have sieve holes of the same diameter, and the inner wall of the arc-shaped shell 13 is slidably connected to the surface of the grinding roller 11. Electric telescopic rods 5 are fixedly installed at the four corners of the bottom of the outer casing 1. The telescopic ends of the electric telescopic rods 5 extend vertically upwards and... The coal powder, which is fixedly connected to the bottom surface of the screen plate 12 and ground by the two grinding rollers 11, falls onto the two screen plates 12. The qualified coal powder falls onto the inclined plate 6 after being screened by the screen plates 12. However, the unqualified coal powder or small coal lumps will slide along the surface of the screen plate 12 into the arc-shaped shell 13 for collection. Then, under the extension of the electric telescopic rod 5, the screen plate 12 rises until the grinding rollers 11 enter the arc-shaped shell 13, so that the coal lumps collected in the arc-shaped shell 13 are ground a second time until they are qualified and pass through the screen plate 12.

[0025] Working principle: During use, coal blocks enter the outer shell 1 through the feeding port 3 and fall between the two grinding rollers 11 under the obstruction of the two baffles 2. According to the size of the falling coal blocks, the electric push rod 8 is used to extend and retract to swing the swing seat 7 to adjust the distance between the two grinding rollers 11. After being ground by the two grinding rollers 11, the coal powder falls onto the screen plate 12. After secondary screening by the screen plate 12, it falls onto the inclined plate 6 and is discharged. Unqualified coal powder or coal blocks on the screen plate 12 slide along the surface of the screen plate 12 to be collected in the arc-shaped shell 13. Then, under the extension of the electric telescopic rod 5, the screen plate 12 is raised to the grinding rollers 11 entering the arc-shaped shell 13, realizing the secondary grinding of the coal blocks collected in the arc-shaped shell 13 until they pass through the screen plate 12.

[0026] The wiring diagrams of the electric telescopic rod 5, scanner 10, and electric push rod 8 in this utility model are common knowledge in the field. Their working principles are known technologies. The appropriate model is selected according to actual use. Therefore, the control method and wiring layout of the electric telescopic rod 5, scanner 10, and electric push rod 8 will not be explained in detail.

[0027] 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 technical solution of the present utility model.

Claims

1. A medium speed coal mill roller arrangement comprising a housing (1) and two symmetrically arranged grinding rollers (11), characterized in that: The inner walls on both sides of the outer shell (1) are hinged with swing seats (7) that swing up and down at the same height. The two grinding rollers (11) are respectively installed on the swing sides of the two swing seats (7). The middle of the swing seat (7) is rotatably connected to an electric push rod (8) that is hinged to the inner wall of the outer shell (1). The top edge of the inner shell (1) is provided with a feeding port (3) and a scanner (10) is fixedly installed around the feeding port (3). The top edge of the swing side of the swing seat (7) is fixedly installed with a baffle (2) that penetrates the side of the outer shell (1). The side of the baffle (2) is slidably connected to both ends of the grinding roller (11) and the side of the baffle (2) is rotatably connected to a roller (9) that is rotatably connected to the roller surface of the grinding roller (11).

2. The medium speed coal mill roller arrangement of claim 1, wherein: The outer shell (1) has a through groove (14) on its side that is slidably connected to the baffle (2). The center of the through groove (14) and the baffle (2) is located on the rotation axis of the swing seat (7).

3. The medium speed coal mill roller arrangement of claim 1, wherein: An inclined plate (6) is fixedly installed inside the outer shell (1) near the bottom, and a discharge port (4) located on the lower side of the inclined plate (6) is provided on the side of the outer shell (1).

4. The medium speed mill roller assembly of claim 1, wherein: Elastic cloth (15) is installed inside the outer shell (1) at both ends of the grinding roller (11). The two elastic cloths (15) are located between the two baffles (2) and the elastic cloths (15) are fixedly installed on the opposite sides of the two baffles (2).

5. The medium speed mill roller assembly of claim 1, wherein: Two symmetrically arranged screen plates (12) are slidably installed inside the outer casing (1) near the bottom. The two screen plates (12) are located below the two grinding rollers (11) and the upper surface of the screen plates (12) is concave.

6. The medium speed coal mill roller arrangement of claim 5, wherein: An arc-shaped shell (13) is fixedly installed in the recess of the sieve plate (12). The surface of the arc-shaped shell (13) and the surface of the sieve plate (12) have sieve holes of the same diameter, and the inner wall of the arc-shaped shell (13) is slidably connected to the surface of the grinding roller (11).

7. The medium speed coal mill roller arrangement of claim 5, wherein: Electric telescopic rods (5) are fixedly installed at the four corners of the bottom of the outer shell (1). The telescopic ends of the electric telescopic rods (5) are vertically upward and fixedly connected to the bottom surface of the sieve plate (12).

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