A bowl type medium speed coal mill grinding roller and bowl device

Abstract

The present invention discloses a bowl-type medium-speed coal mill grinding roller and bowl device, and relates to the field of coal mills. The present invention comprises a machine body, the outer surface of which is surrounded by a slide groove, the interior of which is connected to a gear ring via a slider, and the present invention is provided with a tooth key, a first driven gear, a second driven gear, a first rotating shaft, a second rotating shaft and bristles, so that when the grinding bowl rotates, the tooth key can be driven to rotate, and the rotation of the tooth key causes the first driven gear to drive the first rotating shaft to rotate, so that the grinding roller rotates to grind the coal, and the bristles can brush off the sticky materials on the grinding roller during rotation, and at the same time, the rotation of the first driven gear can cause the second driven gear to rotate, thereby causing the second rotating shaft to rotate in the opposite direction to the first rotating shaft, and the rotation of the second rotating shaft can drive the bristles to rotate, and the bristles can improve the cleaning effect on the grinding roller during rotation, and the grinding effect on the coal can be improved by removing the sticky materials on the grinding roller.

Description

Technical Field

[0001] The invention relates to the field of coal grinding machinery, in particular to a bowl-type medium-speed coal grinding machine grinding roller and bowl device. Background Art

[0002] A coal mill is a device that grinds raw coal into coal powder, and then sends the coal powder to the furnace of a boiler for combustion and power generation. The coal grinding assembly of the coal mill includes a grinding bowl mechanism, a grinding roller mechanism, and an impeller mechanism. The grinding roller mechanism and the grinding bowl mechanism work together to grind the raw coal into coal powder. The hot air from the primary air duct can generate upward lift through the impeller mechanism, thereby performing a primary separation of the coal powder.

[0003] The existing coal mill has a fixed distance between the grinding roller and the grinding bowl, which is not convenient to adjust according to actual conditions. For example, after long-term use, the grinding roller will wear, which will increase the distance between the grinding roller and the grinding bowl, thereby affecting the fineness of the coal powder. For another example, the block diameters of coal from different batches are different, and the distance between the grinding roller and the grinding bowl is fixed. Coal blocks with larger block diameters are difficult to enter under the grinding roller and cannot be ground. Secondly, some coal is easy to adhere to the grinding roller during the grinding process, so that the sticky matter keeps rotating with the grinding roller. In the long run, this will affect the grinding effect of the coal and the metal impurities in the coal will aggravate the wear of the grinding roller. Summary of the invention

[0004] Based on this, the purpose of the present invention is to provide a bowl-type medium-speed coal mill grinding roller and grinding bowl device to solve the technical problems that the distance between the grinding roller and the grinding bowl is difficult to adjust and the sticky matter on the grinding roller affects the grinding effect and accelerates the wear of the grinding roller.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a bowl-type medium-speed coal mill grinding roller and bowl device, comprising a body, a slide groove is arranged around the outer surface of the body, a gear ring is connected to the inside of the slide groove through a slider, wedge plates are fixed on both sides of the top of the gear ring, swing members are connected to the inside of the body through a connecting shaft, connecting blocks are fixed on both sides of the body, a spring is fixed on the bottom of the connecting block, a mounting plate is fixed on one end of the swing member, a first rotating shaft and a second rotating shaft are respectively mounted on one side of the mounting plate, a second driven gear and bristles are respectively arranged on the outer surface of the second rotating shaft, a first driven gear and a grinding roller are respectively arranged on the outer surface of the first rotating shaft, a crushing ball is fixed on one side of the grinding roller through a fixing frame, a grinding bowl is installed inside the body, a protrusion is arranged on the top of the grinding bowl, a tooth key is arranged around the top of the grinding bowl, a servo motor is mounted on one side of the body through a fixing plate, and a driving gear is connected to the output end of the servo motor.

[0006] Furthermore, the tooth key is meshed with the first driven gear, and the first driven gear is meshed with the second driven gear.

[0007] By adopting the above technical solution, the tooth key can drive the first driven gear to rotate, and the first driven gear can drive the second driven gear to rotate.

[0008] Furthermore, the bristles are made of nylon material, and the bristles are in contact with the grinding roller.

[0009] By adopting the above technical solution, the bristles can brush off the sticky substances on the grinding roller, thereby improving the grinding effect and reducing the degree of wear of the grinding roller by the sticky substances.

[0010] Furthermore, the protrusion is located in the middle of the top of the grinding bowl, and the protrusion is conical.

[0011] By adopting the above technical solution, the protrusion can achieve the purpose of diversion, thereby guiding the coal to the outer edge of the grinding bowl.

[0012] Furthermore, the springs are provided in two groups, and the two groups of springs are made of spring steel material.

[0013] By adopting the above technical solution, the spring steel material has stronger elasticity, which can drive the grinding roller to tilt upward, thereby increasing the gap between the grinding roller and the grinding bowl.

[0014] Furthermore, both sides of the wedge plate are sloped, and the wedge plate is in contact with the bottom of the swinging member.

[0015] By adopting the above technical solution, pressure can be applied to the swinging member during the movement of the wedge plate, thereby achieving the purpose of adjusting the gap.

[0016] Furthermore, the crushing balls are provided in multiple groups, and crushing cone teeth are fixed on the outer surfaces of the multiple groups of crushing balls.

[0017] By adopting the above technical solution, the crushing balls can crush the coal with larger block diameters during the rotation process, thereby reducing the block diameter of the coal.

[0018] In summary, the present invention mainly has the following beneficial effects:

[0019] 1. The present invention is provided with a swinging member, a servo motor, a driving gear, a crushing ball, a gear ring, a slider, a slide groove and a spring. When the grinding roller wears and causes the distance between the grinding roller and the grinding bowl to increase, the staff starts the servo motor, and the rotation of the servo motor causes the driving gear to rotate. The rotation of the driving gear causes the gear ring to rotate in the slide groove in cooperation with the slider, so that the wedge plate rotates. The rotation of the wedge plate can press one end of the swinging member upward, so that the other end of the swinging member moves downward, so that the distance between the grinding roller and the grinding bowl can be reduced, thereby avoiding the grinding effect being affected by the wear of the grinding roller; and when a batch of coal with a larger block diameter needs to be ground, the staff controls the servo motor to rotate in the opposite direction, so that the wedge plate does not press the swinging member. At this time, the elastic force of the spring can drive one end of the swinging member to move downward, so that the other end of the swinging member moves upward, thereby increasing the distance between the grinding roller and the grinding bowl, so that larger coal can be ground below the grinding roller, and before grinding, the crushing ball can squeeze and crush the larger coal, thereby reducing the block diameter of the coal, improving the grinding effect, and improving the versatility of the coal mill;

[0020] 2. The present invention is provided with a tooth key, a first driven gear, a second driven gear, a first rotating shaft, a second rotating shaft and bristles. When the grinding bowl rotates, the tooth key can be driven to rotate. The rotation of the tooth key causes the first driven gear to drive the first rotating shaft to rotate, so that the grinding roller rotates to grind the coal. During rotation, the bristles can brush off the sticky materials on the grinding roller. At the same time, the rotation of the first driven gear can cause the second driven gear to rotate, thereby causing the second rotating shaft and the first rotating shaft to rotate in opposite directions. The rotation of the second rotating shaft can drive the bristles to rotate. During the rotation process, the bristles can improve the cleaning effect of the grinding roller. By removing the sticky materials on the grinding roller, the grinding effect of the coal can be improved, and the wear of the grinding roller caused by metal debris can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0023] Figure 3 It is a schematic diagram of the side view structure of a crushing ball of the present invention;

[0024] Figure 4 It is a schematic diagram of the gear ring structure of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the swing member of the present invention.

[0026] In the figure: 1. body; 2. slide; 3. slider; 4. gear ring; 5. wedge plate; 6. swing member; 7. connecting shaft; 8. connecting block; 9. spring; 10. fixed plate; 11. servo motor; 12. driving gear; 13. grinding bowl; 14. bump; 15. grinding roller; 16. mounting plate; 17. first rotating shaft; 18. first driven gear; 19. gear key; 20. second rotating shaft; 21. second driven gear; 22. bristles; 23. fixed frame; 24. breaking ball. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] The following describes an embodiment of the present invention based on its overall structure.

[0029] A bowl-type medium-speed coal mill grinding roller and bowl device, such as Figure 1-5 As shown, it includes a body 1, the outer surface of the body 1 is surrounded by a slide groove 2, the interior of the slide groove 2 is connected to a gear ring 4 through a slider 3, wedge plates 5 are fixed on both sides of the top of the gear ring 4, the inner sides of the body 1 are connected to swinging members 6 through connecting shafts 7, connecting blocks 8 are fixed on both sides of the body 1, a spring 9 is fixed on the bottom of the connecting block 8, a mounting plate 16 is fixed at one end of the swinging member 6, a first rotating shaft 17 and a second rotating shaft 20 are respectively mounted on one side of the mounting plate 16, a second driven gear 21 and bristles 22 are respectively arranged on the outer surface of the second rotating shaft 20, the bristles 22 are made of nylon material, and the bristles 22 are in contact with the grinding roller 15, the bristles 22 can brush off the sticky matter on the grinding roller 15, thereby improving the grinding effect and reducing the wear degree of the sticky matter on the grinding roller 15, the first The outer surfaces of the rotating shaft 17 are respectively provided with a first driven gear 18 and a grinding roller 15. A crushing ball 24 is fixed to one side of the grinding roller 15 through a fixing frame 23. There are multiple groups of crushing balls 24, and the outer surfaces of the multiple groups of crushing balls 24 are fixed with crushing cone teeth. The crushing balls 24 can crush the coal with larger block diameters and reduce the block diameter of the coal during rotation. A grinding bowl 13 is installed inside the body 1. A protrusion 14 is provided on the top of the grinding bowl 13. The protrusion 14 is located in the middle of the top of the grinding bowl 13, and the protrusion 14 is conical. The protrusion 14 can serve the purpose of diversion, thereby guiding the coal to the outer edge of the grinding bowl 13. A tooth key 19 is arranged around the top of the grinding bowl 13. A servo motor 11 is installed on one side of the body 1 through a fixing plate 10, and the output end of the servo motor 11 is connected to a driving gear 12.

[0030] See also Figure 1 and Figure 2The tooth key 19 is meshed with the first driven gear 18 , and the first driven gear 18 is meshed with the second driven gear 21 . The tooth key 19 can drive the first driven gear 18 to rotate, and the first driven gear 18 can drive the second driven gear 21 to rotate.

[0031] See also Figure 1 There are two groups of springs 9, both of which are made of spring steel material. The spring steel material has stronger elasticity and can drive the grinding roller 15 to tilt upward, thereby increasing the gap between the grinding roller 15 and the grinding bowl 13.

[0032] See also Figure 1 and Figure 4 Both sides of the wedge plate 5 are sloped, and the wedge plate 5 is in contact with the bottom of the swing member 6. During the movement of the wedge plate 5, pressure can be applied to the swing member 6, thereby achieving the purpose of adjusting the gap.

[0033] The implementation principle of this embodiment is: when the coal mill is operating, the rotation of the grinding bowl 13 can drive the tooth key 19 to rotate, and the rotation of the tooth key 19 makes the first driven gear 18 drive the first rotating shaft 17 to rotate, so that the grinding roller 15 rotates to grind the coal. During the rotation, the bristles 22 can brush off the sticky materials on the grinding roller 15. At the same time, the rotation of the first driven gear 18 can make the second driven gear 21 rotate, and then make the second rotating shaft 20 and the first rotating shaft 17 rotate in the same direction. The rotation of the second rotating shaft 20 can drive the bristles 22 to rotate. The bristles 22 can improve the cleaning effect of the grinding roller 15 during the rotation process. When the grinding roller 15 wears and causes the distance between the grinding roller 15 and the grinding bowl 13 to increase, the staff starts the servo motor 11, and the rotation of the servo motor 11 causes the driving gear 12 to rotate. The rotation of the driving gear 12 causes the gear ring 4 to rotate. The slider rotates in the slide groove with the cooperation of the slider, so that the wedge plate 5 rotates. The rotation of the wedge plate 5 can squeeze one end of the swinging member 6 upwards, so that the other end of the swinging member 6 moves downwards, so that the distance between the grinding roller 15 and the grinding bowl 13 can be reduced, avoiding the grinding roller 15 from affecting the grinding effect after wear. When a batch of coal with a larger block size needs to be ground, the staff controls the servo motor 11 to rotate in the opposite direction, so that the wedge plate 5 does not squeeze the swinging member 6. At this time, under the elastic force of the spring 9, one end of the swinging member 6 can be driven to move downward, so that the other end of the swinging member 6 moves upward, thereby increasing the distance between the grinding roller 15 and the grinding bowl 13, so that larger coal can be ground under the grinding roller 15. Before grinding, the crushing ball 24 can squeeze and crush the larger coal, reduce the block size of the coal, and improve the grinding effect.

[0034] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A bowl-type medium-speed coal mill roller and bowl grinding device, comprising a machine body (1), characterized in that: The outer surface of the machine body (1) is surrounded by a slide groove (2), the interior of the slide groove (2) is connected to a gear ring (4) via a slider (3), wedge plates (5) are fixed on both sides of the top of the gear ring (4), the inner sides of the machine body (1) are connected to a swinging member (6) via a connecting shaft (7), both sides of the wedge plate (5) are sloped, and the wedge plate (5) is in contact with the bottom of the swinging member (6), connecting blocks (8) are fixed on both sides of the machine body (1), a spring (9) is fixed on the bottom of the connecting block (8), and one end of the swinging member (6) can be driven to move downward under the elastic force of the spring (9), a mounting plate (16) is fixed on one end of the swinging member (6), a first rotating shaft (17) and a second rotating shaft (20) are respectively mounted on one side of the mounting plate (16), a second driven gear (21) and a brush (22) are respectively mounted on the outer surface of the second rotating shaft (20), and the first rotating shaft ( The outer surface of the grinding roller (17) is provided with a first driven gear (18) and a grinding roller (15), the bristles (22) are made of nylon material, and the bristles (22) are in contact with the grinding roller (15), a crushing ball (24) is fixed to one side of the grinding roller (15) through a fixing frame (23), a grinding bowl (13) is installed inside the body (1), a protrusion (14) is arranged in the middle of the top of the grinding bowl (13), a tooth key (19) is arranged around the outer edge of the top of the grinding bowl (13), the tooth key (19) is meshed with the first driven gear (18), and the first driven gear (18) is meshed with the second driven gear (21), a servo motor (11) is installed on one side of the body (1) through a fixing plate (10), the output end of the servo motor (11) is connected to a driving gear (12), and the driving gear (12) rotates so that the gear ring (4) rotates in the slide groove (2) with the cooperation of the slider.

2. The bowl-type medium-speed coal mill grinding roller and bowl device according to claim 1, characterized in that: The bulge (14) is located in the middle of the top of the grinding bowl (13), and the bulge (14) is conical.

3. The bowl type medium speed coal mill grinding roller and bowl device according to claim 1, characterized in that: The springs (9) are provided in two groups, and the two groups of springs (9) are both made of spring steel material.

4. The bowl-type medium-speed coal mill grinding roller and bowl device according to claim 1, characterized in that: The crushing balls (24) are provided in multiple groups, and crushing cone teeth are fixed on the outer surfaces of the multiple groups of crushing balls (24).

Images