Coal mill capable of preventing mixing air door from being jammed

Abstract

The utility model relates to the technical field of coal mills, in particular to a coal mill capable of preventing a mixing air door from being jammed, which comprises a base, a coal mill and a body, the coal mill body is arranged on the base and comprises a sealing fan, a primary air pipe and a hot air pipe, the primary air pipe is arranged on one side of the coal mill body, and the hot air pipe is arranged on the other side of the coal mill body. The primary air pipe is connected with the coal mill body, the sealing fan is located on the base and comprises an air outlet, a mixed air door is arranged between the primary air pipe and the hot air pipe and comprises an air door frame and an air door body, a lifting mechanism is arranged on the air door frame, and a dust removal assembly is arranged in the hot air pipe. Through the arrangement of the dust removal assembly, when the coal mill body works, the dust removal assembly can clean up pulverized coal on the air door frame, and the problems that too much pulverized coal is accumulated on the air door frame, so that the mixing air door is jammed when the mixing air door is closed, and the mixing air door is not closed tightly are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mills, in particular to a coal mill capable of preventing a mixing air door from getting stuck. Background Art

[0002] A coal mill is a machine that breaks coal into pieces and grinds them into coal powder. It is an important auxiliary equipment for a pulverized coal furnace.

[0003] At present, the existing mixing air door at the inlet of the coal mill often gets stuck or fails to open or close properly, causing hot air in the hot air duct to enter the coal mill, making it impossible to carry out normal internal inspection of the coal mill. After shutting down the furnace and conducting an internal inspection, it was found that there was serious dust accumulation on the mixing air door track, causing the air door to get stuck and the air door to not close tightly. Utility Model Content

[0004] In view of the above problems, a coal mill is provided which can prevent the mixing damper from getting stuck. By setting a dust removal component, when the coal mill body is working, the dust removal component will clean the coal powder on the damper frame to avoid excessive accumulation of coal powder on the damper frame, which would cause the mixing damper to get stuck when closing and the mixing damper to not close tightly.

[0005] To solve the problems of the prior art, the utility model provides a coal mill that can prevent a mixing damper from getting stuck, comprising a base, a coal mill and a body, the coal mill body being arranged on the base, the coal mill body comprising a sealed fan, a primary air duct and a hot air duct, the primary air duct being arranged on one side of the coal mill body, the primary air duct being connected to the coal mill body, the sealed fan being located on the base, the sealed fan comprising an air outlet, a mixing damper being arranged between the primary air duct and the hot air duct, the mixing damper comprising a damper frame and a damper body, the damper body being slidably connected to the damper frame, a lifting mechanism being arranged on the damper frame that can drive the damper body to move in the damper frame, and a dust removal component being arranged in the hot air duct that can clean the coal powder at the connection between the damper body and the damper frame.

[0006] Preferably, the dust removal assembly includes an air source pipe; the air source pipe is a seamless steel pipe, one end of the air source pipe is connected to the air outlet of the sealed fan, the other end of the air source pipe passes through the hot air pipe and extends to the interior of the hot air pipe, the air source pipe is connected to the hot air pipe, a hose is provided at one end of the air source pipe located at the hot air pipe, one end of the hose is connected to the air source pipe, a conical pipe is provided at the other end of the hose, an air nozzle is provided at the end of the conical pipe away from the hose, the output end of the air nozzle faces the connection between the damper body and the damper frame, and a moving part that can drive the air nozzle to move up and down is provided at the bottom of the conical pipe.

[0007] Preferably, the moving part includes a cylinder, a moving rod and a fixed ring; the cylinder is arranged on the base and the cylinder is connected to the base; the fixed ring is sleeved on the conical tube and the fixed ring is connected to the conical tube; the moving rod is vertically arranged on the fixed ring, one end of the moving rod is connected to the fixed ring, and the other end of the moving rod passes through the hot air pipe and is connected to the output shaft of the cylinder.

[0008] Preferably, the lifting mechanism includes a mounting plate, a rotating motor, a rotating rod, a gear and a rack; there are two mounting plates, and the two mounting plates are symmetrically arranged on one side of the top of the damper frame, the mounting plates are connected to the damper frame, and a limit portion for limiting the moving distance of the damper body is arranged on the top of the damper frame; the rotating rod is arranged between the two mounting plates, and the two ends of the rotating rod are respectively rotatably connected to the corresponding mounting plates; the rotating motor is arranged at one end of the rotating rod, the output shaft of the rotating motor is connected to the rotating rod, and the rotating motor is connected to the mounting plate; the gear is arranged on the rotating rod and is located in the middle of the rotating rod, and the gear is connected to the rotating rod; the rack is vertically arranged at the top of the damper body and is located in the middle of the damper body, the rack is connected to the damper body, and the rack is meshed with the gear.

[0009] Preferably, the limiting portion includes a limiting plate; there are two limiting plates, which are symmetrically arranged on both sides of the top of the damper frame, the limiting plates are connected to the damper frame, and the limiting plates can abut and cooperate with the damper body.

[0010] Preferably, a protective plate is provided on the damper frame; the protective plate is located in the middle of the damper frame, the protective plate is connected to the damper frame, a movable groove for the rack to move is provided on the protective plate, and the rack is slidably connected to the protective plate.

[0011] Preferably, a solenoid valve is provided on the gas source pipe.

[0012] Preferably, a support rod is provided on the base; one end of the support rod is connected to the base, and the other end of the support rod is connected to the air source pipe.

[0013] Compared with the prior art, the utility model has the following beneficial effects: through the arrangement of the dust removal assembly, the utility model can clean the coal powder on the damper frame when the coal mill body is working, thereby avoiding excessive accumulation of coal powder on the damper frame, which would cause the mixing damper to become stuck when closing and the mixing damper to be not tightly closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a three-dimensional structural schematic diagram of a coal mill for preventing a mixing air door from getting stuck.

[0015] Figure 2 It is a schematic diagram of the partial three-dimensional structure of a coal mill for preventing the mixing air door from getting stuck.

[0016] Figure 3The present invention is a partial three-dimensional structural cross-sectional view of a coal mill for preventing a mixing air door from getting stuck.

[0017] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0018] The numbers in the figure are: 1. Coal mill body; 11. Sealed fan; 111. Air outlet pipe; 12. Hot air pipe; 13. Primary air duct; 2. Mixing damper; 21. Damper frame; 22. Damper body; 3. Lifting mechanism; 31. Mounting plate; 32. Rotating motor; 33. Rotating rod; 34. Gear; 35. Rack; 36. Limiting part; 361. Limiting plate; 37. Protective plate; 4. Dust removal assembly; 41. Air source pipe; 42. Hose; 43. Air nozzle; 44. Conical pipe; 45. Moving part; 451. Cylinder; 452. Moving rod; 453. Fixed ring; 5. Solenoid valve; 6. Support rod; 7. Base. DETAILED DESCRIPTION

[0019] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Reference Figures 1 to 4 As shown, a coal mill for preventing a mixing damper from getting stuck comprises a base 7, a coal mill and a body, wherein a coal mill body 1 is arranged on the base 7, the coal mill body 1 comprises a sealed fan 11, a primary air duct 13 and a hot air duct 12, the primary air duct 13 is arranged on one side of the coal mill body 1, the primary air duct 13 is connected to the coal mill body 1, the sealed fan 11 is located on the base 7, the sealed fan 11 comprises an air outlet, a mixing damper 2 is arranged between the primary air duct 13 and the hot air duct 12, the mixing damper 2 comprises a damper frame 21 and a damper body 22, the damper body 22 is slidably connected to the damper frame 21, a lifting mechanism 3 capable of driving the damper body 22 to move in the damper frame 21 is arranged on the damper frame 21, and a dust removal component 4 capable of cleaning the coal powder at the connection between the damper body 22 and the damper frame 21 is arranged in the hot air duct 12.

[0021] The initial state of the mixing damper 2 is a closed state. When working, the coal mill body 1 is started and the coal mill body 1 begins to grind coal. During the operation of the coal mill body 1, the hot air in the hot air pipe 12 cannot enter the interior of the coal mill body 1. When the coal mill body 1 needs hot air drying, the lifting mechanism 3 is started, and the lifting mechanism 3 drives the damper body 22 to move in the damper frame 21. The staff can control the opening and closing size of the mixing damper 2 according to the current situation. When the mixing damper 2 is opened, the coal powder will float onto the damper frame 21. At this time, the dust removal component 4 is started, and the dust removal component 4 will clean the coal powder on the damper frame 21. Through the setting of the dust removal component 4, when the coal mill body 1 is working, the dust removal component 4 will clean the coal powder on the damper frame 21 to avoid excessive accumulation of coal powder on the damper frame 21, which will cause the mixing damper 2 to be stuck when closing and the mixing damper 2 to be not tightly closed.

[0022] Reference Figure 2 and Figure 4 As shown, the dust removal component 4 includes an air source pipe 41, which is a seamless steel pipe. One end of the air source pipe 41 is connected to the air outlet of the sealed fan 11, and the other end of the air source pipe 41 passes through the hot air pipe 12 and extends to the interior of the hot air pipe 12. The air source pipe 41 is connected to the hot air pipe 12. The air source pipe 41 is located at one end of the hot air pipe 12 and is provided with a hose 42. One end of the hose 42 is connected to the air source pipe 41, and the other end of the hose 42 is provided with a conical pipe 44. An air nozzle 43 is provided at one end of the conical pipe 44 away from the hose 42. The output end of the air nozzle 43 faces the connection between the damper body 22 and the damper frame 21, and a moving part 45 capable of driving the air nozzle 43 to move up and down is provided below the conical pipe 44.

[0023] When the sealed fan 11 is working, the air source pipe 41 guides the air blown by the sealed fan 11 to the air nozzle 43 through the hose 42 and the tapered tube 44. The output end of the air nozzle 43 is facing the connection between the damper body 22 and the damper frame 21, so as to blow away the coal powder at the connection between the damper body 22 and the damper frame 21. The setting of the movable part 45 can make the output surface of the air nozzle 43 wider, and the setting of the tapered tube 44 can make the wind speed from the hose 42 to the air nozzle 43 larger and blow cleaner.

[0024] Reference Figure 3 and Figure 4 As shown, the moving part 45 includes a cylinder 451, a moving rod 452 and a fixed ring 453. The cylinder 451 is arranged on the base 7, and the cylinder 451 is connected to the base 7. The fixed ring 453 is sleeved on the conical tube 44, and the fixed ring 453 is connected to the conical tube 44. The moving rod 452 is vertically arranged on the fixed ring 453, one end of the moving rod 452 is connected to the fixed ring 453, and the other end of the moving rod 452 passes through the hot air pipe 12 and is connected to the output shaft of the cylinder 451.

[0025] During operation, the cylinder 451 drives the moving rod 452 to move, the moving rod 452 moves through the fixing ring 453 to drive the tapered tube 44 to move, and the movement of the tapered tube 44 drives the air nozzle 43 to move.

[0026] Reference Figure 2 As shown, the lifting mechanism 3 includes a mounting plate 31, a rotating motor 32, a rotating rod 33, a gear 34 and a rack 35. The mounting plates 31 have two, and the two mounting plates 31 are symmetrically arranged on one side of the top of the damper frame 21. The mounting plates 31 are connected to the damper frame 21. A limit portion 36 for limiting the moving distance of the damper body 22 is arranged on the top of the damper frame 21. The rotating rod 33 is arranged between the two mounting plates 31. The two ends of the rotating rod 33 are respectively rotatably connected to the corresponding mounting plates 31. The rotating motor 32 is arranged at one end of the rotating rod 33. The output shaft of the rotating motor 32 is connected to the rotating rod 33. The rotating motor 32 is connected to the mounting plate 31. The gear 34 is arranged on the rotating rod 33 and is located in the middle of the rotating rod 33. The gear 34 is connected to the rotating rod 33. The rack 35 is vertically arranged on the top of the damper body 22 and is located in the middle of the damper body 22. The rack 35 is connected to the damper body 22, and the rack 35 is meshed with the gear 34.

[0027] During operation, the rotating motor 32 is started, and the output shaft of the rotating motor 32 rotates to drive the rotating rod 33 connected thereto to rotate. The rotation of the rotating rod 33 drives the gear 34 to rotate. The rotation of the gear 34 drives the rack 35 to move. The movement of the rack 35 drives the damper body 22 to move on the damper frame 21. The setting of the limit part 36 can limit the moving distance of the damper body 22.

[0028] As shown in reference 3, the limiting portion 36 includes a limiting plate 361, and there are two limiting plates 361. The two limiting plates 361 are symmetrically arranged on both sides of the top of the damper frame 21. The limiting plates 361 are connected to the damper frame 21, and the limiting plates 361 can abut and cooperate with the damper body 22.

[0029] When the top of the damper body 22 touches the limiting plate 361 , it means that the damper body 22 has reached the limit position, and the rotating motor 32 stops working.

[0030] Reference Figure 3 As shown, a protective plate 37 is provided on the damper frame 21, the protective plate 37 is located in the middle of the damper frame 21, the protective plate 37 is connected to the damper frame 21, a movable groove for the rack 35 to move is opened on the protective plate 37, and the rack 35 is slidably connected to the protective plate 37.

[0031] The provision of the protection plate 37 can protect the rack 35 and prevent the rack 35 from being broken due to external factors.

[0032] Reference Figure 3 As shown, a solenoid valve 5 is provided on the gas source pipe 41 .

[0033] During operation, the staff can individually control the on / off of the gas source pipe 41 by controlling the switch of the solenoid valve 5 .

[0034] Reference Figure 1 As shown, a support rod 6 is provided on the base 7, one end of the support rod 6 is connected to the base 7, and the other end of the support rod 6 is connected to the air source pipe 41.

[0035] The arrangement of the support rod 6 can make the gas source pipe 41 more stable during operation.

[0036] The above embodiments only express one or several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims

1. A coal mill for preventing a mixing air door from getting stuck, comprising a base (7), a coal mill and a body, wherein the coal mill body (1) is arranged on the base (7), the coal mill body (1) comprises a sealed fan (11), a primary air duct (13) and a hot air duct (12), the primary air duct (13) is arranged on one side of the coal mill body (1), the primary air duct (13) is connected to the coal mill body (1), the sealed fan (11) is located on the base (7), the sealed fan (11) comprises an air outlet, and is characterized in that: A mixing damper (2) is arranged between the primary air duct (13) and the hot air duct (12), the mixing damper (2) comprising a damper frame (21) and a damper body (22), the damper body (22) being slidably connected to the damper frame (21), a lifting mechanism (3) being arranged on the damper frame (21) and being capable of driving the damper body (22) to move within the damper frame (21), and a dust removal component (4) being arranged within the hot air duct (12) and being capable of cleaning coal powder at the connection between the damper body (22) and the damper frame (21).

2. A coal mill for preventing a mixing air door from getting stuck according to claim 1, characterized in that: The dust removal component (4) comprises an air source pipe (41); The air source pipe (41) is a seamless steel pipe. One end of the air source pipe (41) is connected to the air outlet of the sealed fan (11). The other end of the air source pipe (41) passes through the hot air pipe (12) and extends to the inside of the hot air pipe (12). The air source pipe (41) is connected to the hot air pipe (12). A hose (42) is provided at one end of the air source pipe (41) located at the hot air pipe (12). One end of the hose (42) is connected to the air source pipe (41). A conical pipe (44) is provided at the other end of the hose (42). An air nozzle (43) is provided at one end of the conical pipe (44) away from the hose (42). The output end of the air nozzle (43) faces the connection between the damper body (22) and the damper frame (21). A moving part (45) capable of driving the air nozzle (43) to move up and down is provided below the conical pipe (44).

3. A coal mill for preventing a mixing air door from getting stuck according to claim 2, characterized in that: The moving part (45) includes a cylinder (451), a moving rod (452) and a fixing ring (453); The cylinder (451) is disposed on the base (7), and the cylinder (451) is connected to the base (7); The fixing ring (453) is sleeved on the conical tube (44), and the fixing ring (453) is connected to the conical tube (44); The moving rod (452) is vertically arranged on the fixing ring (453), one end of the moving rod (452) is connected to the fixing ring (453), and the other end of the moving rod (452) passes through the hot air pipe (12) and is connected to the output shaft of the cylinder (451).

4. A coal mill for preventing a mixing air door from getting stuck according to claim 1, characterized in that: The lifting mechanism (3) comprises a mounting plate (31), a rotating motor (32), a rotating rod (33), a gear (34) and a rack (35); There are two mounting plates (31), the two mounting plates (31) are symmetrically arranged on one side of the top of the damper frame (21), the mounting plates (31) are connected to the damper frame (21), and a limiting portion (36) for limiting the moving distance of the damper body (22) is arranged on the top of the damper frame (21); The rotating rod (33) is arranged between the two mounting plates (31), and the two ends of the rotating rod (33) are respectively rotatably connected to the corresponding mounting plates (31); The rotating motor (32) is arranged at one end of the rotating rod (33), the output shaft of the rotating motor (32) is connected to the rotating rod (33), and the rotating motor (32) is connected to the mounting plate (31); The gear (34) is disposed on the rotating rod (33) and is located in the middle of the rotating rod (33), and the gear (34) is connected to the rotating rod (33); The rack (35) is vertically arranged on the top of the damper body (22) and located in the middle of the damper body (22). The rack (35) is connected to the damper body (22), and the rack (35) is meshedly connected to the gear (34).

5. A coal mill for preventing a mixing air door from getting stuck according to claim 4, characterized in that: The limiting portion (36) includes a limiting plate (361); There are two limit plates (361), which are symmetrically arranged on both sides of the top of the damper frame (21). The limit plates (361) are connected to the damper frame (21), and the limit plates (361) can abut against and cooperate with the damper body (22).

6. A coal mill for preventing a mixing air door from getting stuck according to claim 1, characterized in that: A protective plate (37) is provided on the damper frame (21); The protective plate (37) is located in the middle of the damper frame (21), the protective plate (37) is connected to the damper frame (21), a moving groove for the rack (35) to move is provided on the protective plate (37), and the rack (35) is slidably connected to the protective plate (37).

7. A coal mill for preventing a mixing air door from getting stuck according to claim 2, characterized in that: A solenoid valve (5) is provided on the gas source pipe (41).

8. A coal mill for preventing a mixing air door from getting stuck according to claim 1, characterized in that: A support rod (6) is arranged on the base (7); One end of the support rod (6) is connected to the base (7), and the other end of the support rod (6) is connected to the air source pipe (41).

Images