A vertical mill feed inlet air locking device and air locking method

Abstract

The present invention discloses a vertical mill feed port air locking device and air locking method, comprising a base, a vertical mill body being fixedly connected to the right side of the top of the base, and pressure sensors being fixedly installed on both sides of the top of the vertical mill body. The present invention relates to the field of vertical mill feed port air locking technology. The vertical mill feed port air locking device and air locking method load the material to be ground into the screening frame, and the material passes through the screening plate and the second discharge pipe and falls into the sealing frame, and then the motor is started, and the motor starts to drive the conveyor belt, and the material is conveyed to the inside of the buffer box through the conveyor belt. The pressure sensor transmits the real-time material weight pressure value in the buffer box to the data comparator. When the normal value does not match the detection value, the central processing unit will start the solenoid valve and accelerate the rotation of the motor. The two solenoid valves are opened to allow the material in the screening frame to pass through the three second discharge pipes and fall into the inside of the sealing frame at the same time, thereby achieving the effect of accelerating the discharge speed.

Description

Technical Field

[0001] The invention relates to the technical field of air locking technology for a vertical mill feed port, and in particular to an air locking device and an air locking method for a vertical mill feed port. Background Art

[0002] Vertical mill is an ideal large-scale grinding equipment, which is widely used in cement, electric power, metallurgy, chemical industry, non-metallic mineral and other industries. It integrates crushing, drying, grinding, grading and conveying in one, with high production efficiency. It can grind block, granular and powdered raw materials into required powdered materials. In normal use, the vertical mill needs to deliver hot air to the inside. Since the vertical mill needs to be continuously fed during use, the feed port needs to be locked. The existing air locking device uses the rotor scale to lock the air at the feed port of the vertical mill. The disadvantage is that the bottom of the rotor scale and the shell wear quickly, and the material is easily stuck between the rotor and the shell floor, causing the transmission device to trip and stop, affecting normal production. Therefore, it is necessary to design a new type of vertical mill feed port air locking device to solve the above problems. Summary of the Invention

[0003] In response to the deficiencies in the prior art, the present invention provides a vertical mill inlet air locking device and air locking method, which solves the problem that the existing air locking device uses a rotor scale to lock the air at the vertical mill inlet, but has the disadvantage that the bottom and shell of the rotor scale wear out quickly, and materials are easily stuck between the rotor and the shell floor.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a vertical mill inlet air locking device, comprising a base, a vertical mill body is fixedly connected to the right side of the top of the base, pressure sensors are fixedly installed on both sides of the top of the vertical mill body, a buffer box is placed on the top of the pressure sensor, the top of the vertical mill body is fixedly connected to a first sealing sleeve through an opening, the bottom of the buffer box is connected to a first discharge pipe, the bottom end of the first discharge pipe passes through the first sealing sleeve and extends to the interior of the vertical mill body, the two sides of the top of the base are fixedly connected to a first sleeve, the top of the first sleeve is slidably connected to a first load-bearing rod through an opening, the top of the first load-bearing rod on the right side is fixedly connected to a sealing frame, the top of the buffer box is fixedly connected to a second sealing sleeve through an opening, the bottom end of the sealing frame passes through the second sealing sleeve and extends to the interior of the buffer box.

[0005] Preferably, the left side of the surface of the sealing frame is fixedly connected to the chassis, and a motor is fixedly installed on the front part of the inner cavity of the chassis. Both sides of the front part of the inner cavity of the sealing frame are rotatably connected to the first rotating rod through bearing parts, and the surface of the first rotating rod is fixedly connected to a roller. The two rollers are connected by a conveyor belt transmission. The front end of the first rotating rod on the left side passes through the sealing frame and the chassis in sequence and extends to the interior of the chassis. The end of the first rotating rod extending to the interior of the chassis is fixedly connected to the output shaft of the motor through a coupling.

[0006] Preferably, the top of the first load-bearing rod on the left is fixedly connected to a screening frame, the bottom of the screening frame is connected to a second discharge pipe, and three second discharge pipes are arranged from front to back, the bottom end of the second discharge pipe passes through the sealing frame and extends to the interior of the sealing frame, solenoid valves are fixedly installed on the surfaces of the front and rear two second discharge pipes, and slide grooves are provided on both sides of the inner cavity of the screening frame, a slider is slidably connected to the inside of the slide groove, and a screen plate is fixedly connected between the two sliders.

[0007] Preferably, the rear portion of the inner cavity of the screening frame is rotatably connected to a second rotating rod through an opening, and the front end of the second rotating rod is fixedly connected to a cam.

[0008] Preferably, the rear end of the first rotating rod on the left side passes through the sealing frame and extends to the outside of the sealing frame. The rear end of the first rotating rod on the left side and the rear end of the second rotating rod are both fixedly connected to sprockets, and the two sprockets are connected by chain transmission.

[0009] Preferably, a second sleeve is fixedly connected to the left side of the top of the vertical mill body, the top of the second sleeve is slidably connected to a second load-bearing rod through an opening, and the top of the second load-bearing rod is fixedly connected to the bottom of the sealing frame.

[0010] Preferably, a drive box is fixedly connected to the top of the base, a power supply module is fixedly installed on the right side of the inner cavity of the drive box, and a central processing unit is fixedly installed on the left side of the inner cavity of the drive box.

[0011] Preferably, the output end of the pressure sensor is connected to the input end of the data comparator, the output end of the data comparator is connected to the input end of the feedback module, the output end of the feedback module is connected to the input end of the central processing unit, the output end of the central processing unit is connected to the input end of the data comparator, the solenoid valve and the motor, and the output end of the power supply module is electrically connected to the input end of the pressure sensor and the central processing unit respectively.

[0012] The present invention also discloses an air locking method for an air locking device for a vertical mill feed port, which specifically comprises the following steps:

[0013] S1. The operator inputs a normal pressure value into the central processing unit through a key as the normal value of the material weight inside the buffer box. The pressure sensor can detect the material weight in the buffer box as the detection value. The material to be ground is loaded into the screening frame. The material is screened by the screen plate and falls into the bottom of the inner cavity of the screening frame, and falls into the sealing frame through the second discharge pipe in the middle. Then the motor is started, and the motor starts to drive the first rotating rod to rotate. The rotation of the first rotating rod drives the roller to rotate. At this time, the two rollers are driven by the conveyor belt. When the material enters the sealing frame, it falls to the top of the conveyor belt and is transported to the inside of the buffer box through the conveyor belt. The material falling into the buffer box enters the interior of the vertical mill through the first discharge pipe;

[0014] S2. The pressure sensor transmits the real-time material weight and pressure value in the buffer box to the data comparator, which transmits the pressure value to the central processing unit through the feedback module. The normal value set before use is transmitted to the data comparator through the central processing unit. When the normal value does not match the detection value, the central processing unit will activate the solenoid valve and accelerate the rotation of the motor.

[0015] S3, the two solenoid valves are opened to allow the material in the screening frame to fall into the interior of the sealing frame through the three second discharge pipes at the same time, which speeds up the discharge speed. The motor drives the first rotating rod to rotate faster, making the conveying efficiency of the conveyor belt higher, increasing the speed of material accumulation in the buffer box, and thus making the height of the material in the buffer box constant;

[0016] S4. The first rotating rod rotates to drive the sprocket to rotate. The sprocket rotates to drive the second rotating rod to rotate through the chain. The second rotating rod rotates to drive the cam to rotate. The rotation of the cam causes the screen plate to move up and down reciprocatingly. The up and down reciprocating movement of the screen plate increases the efficiency of screening materials.

[0017] S5. Pull the two first load-bearing rods upward. The first load-bearing rods rise and drive the sealing frame and the screening frame to rise. The sealing frame rises and moves to the outside of the second sealing sleeve. At this time, pull the buffer box upward. The rising buffer box drives the first discharge pipe to move to the outside of the first sealing sleeve, so as to facilitate the dismantling and maintenance and quickly install the screening frame, sealing frame and buffer box.

[0018] Beneficial effects

[0019] The present invention provides a vertical mill feed inlet air locking device and air locking method. Compared with the existing technology, it has the following advantages:

[0020] (1) The vertical mill feed port air locking device and air locking method are as follows: the material to be ground is loaded into the screening frame, and the material falls into the sealing frame through the screening plate and the second discharge pipe, and then the motor is started. The motor starts to drive the conveyor belt, and the material is conveyed to the inside of the buffer box through the conveyor belt. The pressure sensor transmits the real-time material weight pressure value in the buffer box to the data comparator. When the normal value does not match the detection value, the central processing unit will start the solenoid valve and accelerate the rotation of the motor. The two solenoid valves are opened to allow the material in the screening frame to fall into the inside of the sealing frame through the three second discharge pipes at the same time, thereby achieving the effect of accelerating the discharge speed. In addition, the motor drives the first rotating rod to rotate faster, making the conveyor belt more efficient in conveying materials, increasing the speed of material accumulation in the buffer box, and keeping the height of the material in the buffer box constant. Not only does it achieve the air locking effect, but it also avoids the situation where the rotor scale and the shell are easily worn due to the use of the rotor scale.

[0021] (2) The air locking device and air locking method for the vertical mill feed port are configured such that the motor starts to drive the first rotating rod to rotate, the rotation of the first rotating rod drives the sprocket to rotate, the rotation of the sprocket drives the second rotating rod to rotate through the chain, the rotation of the second rotating rod drives the cam to rotate, the rotation of the cam causes the screen plate to move up and down reciprocatingly, and the up and down reciprocating movement of the screen plate increases the efficiency of screening materials.

[0022] (3) The vertical mill feed inlet air locking device and air locking method are configured such that the two first load-bearing rods are pulled upwards, and the first load-bearing rods rise to drive the sealing frame and the screening frame to rise, and the sealing frame rises and moves to the outside of the second sealing sleeve. At this time, the buffer box is pulled upwards, and the rising buffer box drives the first discharge pipe to move to the outside of the first sealing sleeve, so as to facilitate the dismantling and maintenance and quickly install the screening frame, the sealing frame and the buffer box. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a cross-sectional view of the sealing frame, buffer box and screening frame structure of the present invention;

[0025] Figure 3 For the present invention Figure 2 A partial enlarged view of point A in the middle;

[0026] Figure 4 It is a side view of the internal structure of the chassis, sealing frame and screening frame of the present invention;

[0027] Figure 5 It is a structural principle block diagram of the system of the present invention.

[0028] In the figure: 1. Base; 2. Vertical mill body; 3. First sleeve; 4. First load-bearing rod; 5. Sealing frame; 6. Pressure sensor; 7. Buffer box; 8. First discharge pipe; 9. First sealing sleeve; 10. Second sealing sleeve; 11. Chassis; 12. Motor; 13. First rotating rod; 14. Roller; 15. Conveyor belt; 16. Second sleeve; 17. Second load-bearing rod; 18. Screen frame; 19. Second discharge pipe; 20. Chute; 21. Slider; 22. Screen plate; 23. Second rotating rod; 24. Cam; 25. Sprocket; 26. Chain; 27. Drive box; 28. Power module; 29. CPU; 30. Solenoid valve; 31. Data comparator; 32. Feedback module. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1-5 , the present invention provides two technical solutions:

[0031] Example 1

[0032] A vertical mill inlet air locking device comprises a base 1, a vertical mill body 2 is fixedly connected to the right side of the top of the base 1, pressure sensors 6 are fixedly installed on both sides of the top of the vertical mill body 2, a buffer box 7 is placed on the top of the pressure sensor 6, the top of the vertical mill body 2 is fixedly connected to a first sealing sleeve 9 through an opening, the bottom of the buffer box 7 is connected to a first discharge pipe 8, the bottom end of the first discharge pipe 8 passes through the first sealing sleeve 9 and extends to the interior of the vertical mill body 2, the two sides of the top of the base 1 are fixedly connected to a first sleeve 3, the top of the first sleeve 3 is slidably connected to a first load-bearing rod 4 through an opening, the top of the first load-bearing rod 4 on the right side is fixedly connected to a sealing frame 5, the top of the buffer box 7 is fixedly connected to a second sealing sleeve 10 through an opening, the bottom end of the sealing frame 5 passes through the second sealing sleeve 10 and extends to the interior of the buffer box 7.

[0033] Furthermore, in order to achieve the effect of conveying the screened material, the left side of the surface of the sealing frame 5 is fixedly connected to the chassis 11, and a motor 12 is fixedly installed on the front part of the inner cavity of the chassis 11. The motor 12 is a servo motor. Both sides of the front part of the inner cavity of the sealing frame 5 are rotatably connected to the first rotating rod 13 through bearing parts. The surface of the first rotating rod 13 is fixedly connected to the roller 14. The two rollers 14 are connected by a conveyor belt 15. The left side, front and rear of the conveyor belt 15 are all in contact with the inner wall of the sealing frame 5. The front end of the first rotating rod 13 on the left side passes through the sealing frame 5 and the chassis 11 in sequence and extends to the interior of the chassis 11. The end of the first rotating rod 13 extending to the interior of the chassis 11 is fixedly connected to the output shaft of the motor 12 through a coupling.

[0034] Furthermore, in order to achieve the effect of keeping the material height inside the buffer box 7 unchanged, a drive box 27 is fixedly connected to the top of the base 1, a power module 28 is fixedly installed on the right side of the inner cavity of the drive box 27, and a central processing unit 29 is fixedly installed on the left side of the inner cavity of the drive box 27. The output end of the pressure sensor 6 is connected to the input end of the data comparator 31, the output end of the data comparator 31 is connected to the input end of the feedback module 32, the output end of the feedback module 32 is connected to the input end of the central processing unit 29, the output end of the central processing unit 29 is connected to the input end of the data comparator 31, the solenoid valve 30 and the motor 12, and the output end of the power module 28 is electrically connected to the input end of the pressure sensor 6 and the central processing unit 29 respectively.

[0035] Example 2

[0036] A vertical mill inlet air locking device comprises a base 1, a vertical mill body 2 is fixedly connected to the right side of the top of the base 1, pressure sensors 6 are fixedly installed on both sides of the top of the vertical mill body 2, a buffer box 7 is placed on the top of the pressure sensor 6, the top of the vertical mill body 2 is fixedly connected to a first sealing sleeve 9 through an opening, the bottom of the buffer box 7 is connected to a first discharge pipe 8, the bottom end of the first discharge pipe 8 passes through the first sealing sleeve 9 and extends to the interior of the vertical mill body 2, the two sides of the top of the base 1 are fixedly connected to a first sleeve 3, the top of the first sleeve 3 is slidably connected to a first load-bearing rod 4 through an opening, the top of the first load-bearing rod 4 on the right side is fixedly connected to a sealing frame 5, the top of the buffer box 7 is fixedly connected to a second sealing sleeve 10 through an opening, the bottom end of the sealing frame 5 passes through the second sealing sleeve 10 and extends to the interior of the buffer box 7.

[0037] Furthermore, in order to achieve the effect of conveying the screened material, the left side of the surface of the sealing frame 5 is fixedly connected to the chassis 11, and a motor 12 is fixedly installed on the front part of the inner cavity of the chassis 11. The motor 12 is a servo motor. Both sides of the front part of the inner cavity of the sealing frame 5 are rotatably connected to the first rotating rod 13 through bearing parts. The surface of the first rotating rod 13 is fixedly connected to the roller 14. The two rollers 14 are connected by a conveyor belt 15. The left side, front and rear of the conveyor belt 15 are all in contact with the inner wall of the sealing frame 5. The front end of the first rotating rod 13 on the left side passes through the sealing frame 5 and the chassis 11 in sequence and extends to the interior of the chassis 11. The end of the first rotating rod 13 extending to the interior of the chassis 11 is fixedly connected to the output shaft of the motor 12 through a coupling.

[0038] Furthermore, in order to achieve the effect of keeping the material height inside the buffer box 7 unchanged, a drive box 27 is fixedly connected to the top of the base 1, a power module 28 is fixedly installed on the right side of the inner cavity of the drive box 27, and a central processing unit 29 is fixedly installed on the left side of the inner cavity of the drive box 27. The output end of the pressure sensor 6 is connected to the input end of the data comparator 31, the output end of the data comparator 31 is connected to the input end of the feedback module 32, the output end of the feedback module 32 is connected to the input end of the central processing unit 29, the output end of the central processing unit 29 is connected to the input end of the data comparator 31, the solenoid valve 30 and the motor 12, and the output end of the power module 28 is electrically connected to the input end of the pressure sensor 6 and the central processing unit 29 respectively.

[0039] Furthermore, in order to increase the screening effect of the material, the top of the left first load-bearing rod 4 is fixedly connected to the screening frame 18, and the bottom of the screening frame 18 is connected to a second discharge pipe 19, and three second discharge pipes 19 are arranged from front to back, and the bottom ends of the second discharge pipes 19 pass through the sealing frame 5 and extend to the interior of the sealing frame 5. The surfaces of the front and rear two second discharge pipes 19 are fixedly installed with solenoid valves 30, and slide grooves 20 are provided on both sides of the inner cavity of the screening frame 18, and a slider 21 is slidably connected inside the slide groove 20. A screen plate 22 is fixedly connected between the two sliders 21, and the rear part of the inner cavity of the screening frame 18 is rotatably connected to the second rotating rod 23 through the opening, and the front end of the second rotating rod 23 is fixedly connected to the cam 24. The rear end of the left first rotating rod 13 passes through the sealing frame 5 and extends to the outside of the sealing frame 5, and the rear ends of the left first rotating rod 13 and the second rotating rod 23 are fixedly connected to a sprocket 25, and the two sprockets 25 are connected by a chain 26 for transmission.

[0040] Furthermore, in order to facilitate the removal, maintenance and installation of the screening frame 18, the sealing frame 5 and the buffer box 7, a second sleeve 16 is fixedly connected to the left side of the top of the vertical mill body 2, and the top of the second sleeve 16 is slidably connected to the second load-bearing rod 17 through an opening, and the top of the second load-bearing rod 17 is fixedly connected to the bottom of the sealing frame 5.

[0041] The advantages of the second embodiment over the first embodiment are that: the first rotating rod 13 is driven to rotate by the motor 12, the rotation of the first rotating rod 13 drives the sprocket 25 to rotate, the rotation of the sprocket 25 drives the second rotating rod 23 to rotate through the chain 26, the rotation of the second rotating rod 23 drives the cam 24 to rotate, the rotation of the cam 24 causes the screen plate 22 to move up and down, and the up and down reciprocating movement of the screen plate 22 increases the efficiency of screening materials, and by pulling the two first load-bearing rods 4 upward, the first load-bearing rods 4 rise and drive the sealing frame 5 and the screening frame 18 to rise, the sealing frame 5 rises and moves to the outside of the second sealing sleeve 10, at this time the buffer box 7 is pulled upward, and the rising buffer box 7 drives the first discharge pipe 8 to move to the outside of the first sealing sleeve 9, so as to achieve the effect of facilitating dismantling and maintenance and quickly installing the screening frame 18, the sealing frame 5 and the buffer box 7.

[0042] The present invention also discloses an air locking method for an air locking device for a vertical mill feed port, which specifically comprises the following steps:

[0043] S1. The operator inputs a normal pressure value to the central processor 29 by pressing a button as the normal value of the weight of the material inside the buffer box 7. The pressure sensor 6 can detect the weight of the material in the buffer box 7 as the detection value. The material to be ground is loaded into the screening frame 18. The material passes through the screening of the screen plate 22 and falls into the bottom of the inner cavity of the screening frame 18, and falls into the sealing frame 5 through the second discharge pipe 19 in the middle. Then the motor 12 is started. The motor 12 starts to drive the first rotating rod 13 to rotate. The rotation of the first rotating rod 13 drives the roller 14 to rotate. At this time, the two rollers 14 are driven by the conveyor belt 15. When the material enters the sealing frame 5, it falls to the top of the conveyor belt 15 and is transported to the inside of the buffer box 7 through the conveyor belt 15. The material falling into the buffer box 7 enters the interior of the vertical mill body 2 through the first discharge pipe 8;

[0044] S2, the pressure sensor 6 transmits the real-time material weight pressure value in the buffer box 7 to the data comparator 31, and the data comparator 31 transmits the pressure value to the central processing unit 29 through the feedback module 32. The normal value set before use is transmitted to the data comparator 31 through the central processing unit 29. When the normal value does not match the detection value, the central processing unit 29 activates the solenoid valve 30 and accelerates the rotation of the motor 12;

[0045] S3, the two solenoid valves 30 are opened to allow the material in the screening frame 18 to simultaneously fall into the interior of the sealing frame 5 through the three second discharge pipes 19, thereby accelerating the discharge speed. The motor 12 drives the first rotating rod 13 to rotate faster, making the conveying efficiency of the conveying belt 15 higher, increasing the speed of material accumulation in the buffer box 7, and thus making the height of the material in the buffer box 7 constant;

[0046] S4. The first rotating rod 13 rotates to drive the sprocket 25 to rotate. The sprocket 25 rotates through the chain 26 to drive the second rotating rod 23 to rotate. The second rotating rod 23 rotates to drive the cam 24 to rotate. The rotation of the cam 24 causes the screen plate 22 to reciprocate up and down. The reciprocating movement of the screen plate 22 increases the efficiency of screening materials.

[0047] S5. Pull the two first load-bearing rods 4 upwards. The rising of the first load-bearing rods 4 drives the sealing frame 5 and the screening frame 18 to rise. The sealing frame 5 rises and moves to the outside of the second sealing sleeve 10. At this time, pull the buffer box 7 upwards. The rising of the buffer box 7 drives the first discharge pipe 8 to move to the outside of the first sealing sleeve 9, so as to achieve the effect of facilitating dismantling and maintenance and quickly installing the screening frame 18, the sealing frame 5 and the buffer box 7.

[0048] At the same time, the contents not described in detail in this specification belong to the existing technology well known to those skilled in the art.

[0049] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A vertical mill feed inlet air locking device, comprising a base (1), characterized in that: The right side of the top of the base (1) is fixedly connected to the vertical mill body (2), and pressure sensors (6) are fixedly installed on both sides of the top of the vertical mill body (2). A buffer box (7) is placed on the top of the pressure sensor (6). The top of the vertical mill body (2) is fixedly connected to a first sealing sleeve (9) through an opening. The bottom of the buffer box (7) is connected to a first discharge pipe (8), and the bottom end of the first discharge pipe (8) passes through the first sealing sleeve (9) and extends to the interior of the vertical mill body (2). The two sides of the top of the base (1) are fixedly connected to a first sleeve (3), and the top of the first sleeve (3) is slidably connected to a first load-bearing rod (4) through an opening. The top of the first load-bearing rod (4) on the right side is fixedly connected to a sealing frame (5), and the top of the buffer box (7) is fixedly connected to a second sealing sleeve (10) through an opening. The bottom end of the sealing frame (5) passes through the second sealing sleeve (10) and extends to the interior of the buffer box (7); The left side of the surface of the sealing frame (5) is fixedly connected to the chassis (11), and the front part of the inner cavity of the chassis (11) is fixedly installed with a motor (12). Both sides of the front part of the inner cavity of the sealing frame (5) are rotatably connected to the first rotating rod (13) through bearings. The surface of the first rotating rod (13) is fixedly connected to a roller (14). The two rollers (14) are connected by a transmission belt (15). The front end of the first rotating rod (13) on the left side passes through the sealing frame (5) and the chassis (11) in sequence and extends to the interior of the chassis (11). The end of the first rotating rod (13) extending to the interior of the chassis (11) is fixedly connected to the output shaft of the motor (12) through a coupling. The top of the first load-bearing rod (4) on the left side is fixedly connected to a screening frame (18), the bottom of the screening frame (18) is connected to a second discharge pipe (19), and three second discharge pipes (19) are arranged from front to back, the bottom end of the second discharge pipe (19) passes through the sealing frame (5) and extends to the inside of the sealing frame (5), and electromagnetic valves (30) are fixedly installed on the surfaces of the two second discharge pipes (19) at the front and rear. Slide grooves (20) are provided on both sides of the inner cavity of the screening frame (18), and a slider (21) is slidably connected inside the slide groove (20), and a screen plate (22) is fixedly connected between the two sliders (21).

2. The vertical mill inlet air locking device according to claim 1, characterized in that: The rear portion of the inner cavity of the screening frame (18) is rotatably connected to a second rotating rod (23) through an opening, and the front end of the second rotating rod (23) is fixedly connected to a cam (24).

3. The vertical mill inlet air locking device according to claim 2, characterized in that: The rear end of the first rotating rod (13) on the left side passes through the sealing frame (5) and extends to the outside of the sealing frame (5). The rear end of the first rotating rod (13) on the left side and the rear end of the second rotating rod (23) are both fixedly connected to a sprocket (25), and the two sprockets (25) are connected by a chain (26).

4. The vertical mill inlet air locking device according to claim 3, characterized in that: A second sleeve (16) is fixedly connected to the left side of the top of the vertical mill body (2), and a second load-bearing rod (17) is slidably connected to the top of the second sleeve (16) through an opening, and the top end of the second load-bearing rod (17) is fixedly connected to the bottom of the sealing frame (5).

5. The vertical mill inlet air locking device according to claim 4, characterized in that: A drive box (27) is fixedly connected to the top of the base (1), a power module (28) is fixedly installed on the right side of the inner cavity of the drive box (27), and a central processing unit (29) is fixedly installed on the left side of the inner cavity of the drive box (27).

6. The vertical mill inlet air locking device according to claim 5, characterized in that: The output end of the pressure sensor (6) is connected to the input end of the data comparator (31), the output end of the data comparator (31) is connected to the input end of the feedback module (32), the output end of the feedback module (32) is connected to the input end of the central processing unit (29), the output end of the central processing unit (29) is connected to the input end of the data comparator (31), the solenoid valve (30) and the motor (12), and the output end of the power supply module (28) is electrically connected to the input end of the pressure sensor (6) and the input end of the central processing unit (29), respectively.

7. An air locking method for the vertical mill feed inlet air locking device according to claim 6, characterized in that: The specific steps include: S1. The operator inputs a normal pressure value to the central processor (29) by pressing a button as the normal value of the weight of the material inside the buffer box (7). The pressure sensor (6) can detect the weight of the material inside the buffer box (7) as the detection value. The material to be ground is loaded into the screening frame (18). The material is screened by the screen plate (22) and falls into the lower part of the inner cavity of the screening frame (18). It falls into the sealing frame (5) through the second discharge pipe (19) in the middle. Then the motor (12) is started. The motor (12) starts to drive the first rotating rod (13) to rotate. The rotation of the first rotating rod (13) drives the roller (14) to rotate. At this time, the two rollers (14) are driven by the conveyor belt (15). When the material enters the sealing frame (5), it falls to the top of the conveyor belt (15) and is transported to the inside of the buffer box (7) through the conveyor belt (15). The material falling into the buffer box (7) enters the inside of the vertical mill body (2) through the first discharge pipe (8); S2, the pressure sensor (6) transmits the real-time material weight pressure value in the buffer box (7) to the data comparator (31), and the data comparator (31) transmits the pressure value to the central processing unit (29) through the feedback module (32). The normal value set before use is transmitted to the data comparator (31) through the central processing unit (29). When the normal value does not match the detection value, the central processing unit (29) starts the solenoid valve (30) and accelerates the rotation of the motor (12); S3, the two solenoid valves (30) are opened to allow the material in the screening frame (18) to simultaneously fall into the interior of the sealing frame (5) through the three second discharge pipes (19), thereby accelerating the discharge speed, and the motor (12) drives the first rotating rod (13) to rotate faster, making the conveying efficiency of the conveying belt (15) higher, increasing the speed of the material accumulation inside the buffer box (7), and thus making the height of the material inside the buffer box (7) constant; S4, the first rotating rod (13) rotates to drive the sprocket (25) to rotate, the sprocket (25) rotates through the chain (26) to drive the second rotating rod (23) to rotate, the second rotating rod (23) rotates to drive the cam (24) to rotate, the cam (24) rotates to make the screen plate (22) move up and down reciprocatingly, and the reciprocating movement of the screen plate (22) increases the efficiency of screening materials; S5. Pull the two first load-bearing rods (4) upwards. The first load-bearing rods (4) rise and drive the sealing frame (5) and the screening frame (18) to rise. The sealing frame (5) rises and moves to the outside of the second sealing sleeve (10). At this time, pull the buffer box (7) upwards. The buffer box (7) rises and drives the first discharge pipe (8) to move to the outside of the first sealing sleeve (9), so as to facilitate the dismantling and maintenance and quickly install the screening frame (18), the sealing frame (5) and the buffer box (7).

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