Intelligent control type medium-speed vertical coal mill separator

Abstract

The application relates to the technical field of coal mill equipment, and discloses a medium-speed vertical coal mill separator capable of being intelligently regulated, which comprises a shell, static blades, rotating blades, a static blade adjusting mechanism, a rotating blade driving control mechanism and a coal inlet pipe, and is characterized in that: the static blades and the rotating blades are both arranged in the shell; the static blade adjusting mechanism is used for controlling the inclination angle adjustment of the static blades; and the rotating blade driving control mechanism is used for controlling the rotation of the rotating blades. The medium-speed vertical coal mill separator can guide the airflow flow direction and flexibly adjust the coal powder fineness according to the working condition change by arranging the rotatable static blades and the rotating blades. When the driving pipe is positively rotated, the rotating frame is driven to rotate by the rotating blade driving control mechanism, the rotating blades rotatingly arranged on the rotating frame are rotated to realize the dynamic separation of the coal powder; when the driving pipe is reversely rotated, the rotating frame does not rotate with the driving pipe, but the rotating blades rotate with the driving pipe, so that the airflow flow direction can be flexibly guided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mill equipment, in particular to a medium-speed vertical coal mill separator capable of intelligent regulation and control. BACKGROUND

[0002] In the modern thermal power generation, cement production and other industrial fields, the medium-speed vertical coal mill has become the core equipment for preparing coal powder due to its advantages of high efficiency, energy saving, small floor area and the like. As a key component of the medium-speed vertical coal mill, the performance of the separator directly affects the particle size distribution and quality of the coal powder, and further relates to the energy consumption and efficiency of the entire production process. The traditional medium-speed vertical coal mill separator mostly adopts a static or dynamic structure. The static separator relies on fixed blade structure and airflow to realize classification of the coal powder, and has low separation efficiency, is difficult to flexibly adjust the fineness of the coal powder according to the working condition change, and is prone to wear after long-time operation, resulting in unstable coal powder particle size. The dynamic separator introduces a rotating component to improve the separation precision to a certain extent, but the speed regulation of the traditional dynamic separator often relies on manual experience, and cannot respond to the dynamic changes of the parameters such as the load of the coal mill and the properties of the raw coal in real time, and has problems such as response lag and inaccurate regulation and control.

[0003] Chinese patent CN114653464B discloses a rotating separator for coal mill of thermal power station, which fully mixes the coal powder and air entering the leaf cage by setting a spoiler mechanism, and reduces the difference in coal powder concentration at the powder outlet pipe.

[0004] The rotor guide vane provided in the above separator rotates with the hollow rotating shaft when the separator works, thereby realizing dynamic separation of the coal powder. However, this way cannot adjust the inclination angle of the rotor guide vane, and cannot flexibly adjust the fineness of the coal powder according to the working condition change. SUMMARY

[0005] (I) Technical problems solved

[0006] In view of the deficiencies of the prior art, the present application provides a medium-speed vertical coal mill separator capable of intelligent regulation and control, which has the function of adjusting the fineness of the coal powder and solves the problems mentioned in the above background.

[0007] (II) Technical solutions

[0008] To solve the above technical problems, the present application provides the following technical solutions:

[0009] The application discloses a smartly controllable separator of a medium-speed vertical coal mill, which comprises a shell, static blades, rotating blades, a static blade adjusting mechanism, a rotating blade driving control mechanism and a coal feeding pipe.

[0010] The rotating blade driving control mechanism comprises a driving pipe, a control disc, a rotating frame and a forward and reverse rotation control assembly.

[0011] The shell is internally provided with a material returning hopper, and the coal feeding pipe is arranged in the driving pipe and fixedly connected with the material returning hopper.

[0012] Preferably, the forward and reverse rotation control assembly comprises a forward rotation transmission structure.

[0013] Preferably, the forward and reverse rotation control assembly comprises a reverse rotation control structure.

[0014] Preferably, the outer wall of the driving pipe is fixedly installed with a transmission ring, the outer sidewall of the transmission ring is provided with an insertion slot, the end of the insertion slot is fixedly installed with a pressure spring, and the forward rotation transmission block and the reverse rotation transmission block are both slidingly inserted into the insertion slot and are fixedly connected with the pressure spring.

[0015] Preferably, the forward and reverse rotation control assembly further comprises a reverse rotation limiting structure, the reverse rotation limiting structure comprises a supporting ring, a connecting plate, a sliding block, a friction plate and a return spring, the rotating frame is rotatably overlapped on the upper surface of the supporting ring, the connecting plate is fixedly installed on the supporting ring, the sliding block is slidingly installed on the connecting plate, the friction surface of the friction plate and the outer sidewall of the rotating frame are provided with mutually adapted friction surfaces, the friction plate is fixedly installed at the end of the sliding block, and the two ends of the return spring are fixedly connected with the sliding block and the connecting plate.

[0016] Preferably, the outer shell and the material returning hopper are fixedly connected with a supporting rod, the coal inlet pipe and the material returning hopper are fixedly connected with a connecting rod, and the connecting plate is fixedly connected with the upper end of the material returning hopper.

[0017] Preferably, the stationary vane is arranged between the inner top wall of the outer shell and the top of the material returning hopper, and the stationary vane adjusting mechanism comprises a dust blocking cavity, a transmission gear ring, an adjusting motor, a driving gear, a driven shaft and a driven gear, the dust blocking cavity is arranged on the inner top wall of the outer shell, the transmission gear ring is rotatably installed in the dust blocking cavity, the adjusting motor is fixedly installed on the outside of the outer shell and the driving shaft of the adjusting motor is fixedly connected with the driving gear, the driven shaft is rotatably installed in the dust blocking cavity and extends through the inner bottom wall of the dust blocking cavity into the inside of the outer shell and is fixedly connected with the stationary vane, and the driving gear and the driven gear are both meshingly connected with the transmission gear ring.

[0018] Preferably, the top of the outer shell is fixedly installed with a distributor, the bottom of the distributor extends into the inside of the outer shell and is arranged on the inner side of the rotating vane, the upper end of the distributor is installed with a plurality of powder outlet pipes arranged in an annular array, the upper part of the distributor is arranged in an inverted conical shape, and the inner wall of the distributor is provided with a helical turbulence plate.

[0019] Preferably, the driving pipe is rotatably connected with the distributor, and the outer surface of the driving pipe in the inside of the distributor is fixedly installed with a disturbance rod.

[0020] Preferably, the rotating vane driving control mechanism further comprises a forward and reverse rotation driving motor, the forward and reverse rotation driving motor is installed on the outside of the distributor, and the driving end of the forward and reverse rotation driving motor is drivingly connected with the driving pipe through a transmission belt wheel.

[0021] (Three) beneficial effects

[0022] Compared with the prior art, the present application provides a medium-speed vertical coal mill separator which can be intelligently regulated, and has the following beneficial effects:

[0023] 1. The medium-speed vertical coal mill separator can guide the flow direction of the airflow and flexibly adjust the fineness of the pulverized coal according to the working condition by setting the rotatable adjusting static blades and the rotating blades. The rotating blade driving control mechanism drives the rotating frame to rotate when the driving pipe rotates in the forward direction, so that the rotating blades installed on the rotating frame rotate to realize the dynamic separation of the pulverized coal. When the driving pipe rotates in the reverse direction, the rotating frame does not rotate with the driving pipe, but the rotating blades rotate with the driving pipe, so that the airflow flow direction can be flexibly guided.

[0024] 2. The medium-speed vertical coal mill separator can realize the adjustment of the angle of the rotating blades by setting the forward rotation transmission structure, the reverse rotation control structure and the reverse rotation limiting structure. When the driving pipe rotates in the forward direction, the forward rotation transmission block pushes the inner ratchet ring fixed in the inner part of the control disc to rotate, so that the inner ratchet outer tooth ring installed in the inner part of the control disc is fixed relative to the reverse rotation transmission block and the angle of the rotating blades remains unchanged. When the driving pipe rotates in the reverse direction, the friction force between the friction plate and the rotating frame makes the forward rotation transmission block push the inner ratchet ring to come out from the inner part thereof and fail to push the control disc to rotate. At this time, the reverse rotation transmission block pushes the inner ratchet outer tooth ring to rotate, and the inner ratchet outer tooth ring drives the driven gear to rotate through the intermediate gear and the inner and outer tooth rings, thereby realizing the adjustment of the angle of the rotating blades.

[0025] 3. The medium-speed vertical coal mill separator can realize the full mixing of the pulverized coal and the air and reduce the concentration difference of the pulverized coal at the outlet pipe by setting the spiral turbulence plate in the distributor and the disturbance rod on the driving pipe. When the pulverized coal enters the distributor, it is disturbed by the disturbance rod and approaches the inverted conical inner wall at the upper part of the distributor. Under the action of the spiral turbulence plate, the pulverized coal and the air are fully mixed, and the concentration difference of the pulverized coal at the outlet pipe is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic view of the three-dimensional structure of the coal mill separator of the present application;

[0027] Figure 2 It is a schematic view of the three-dimensional structure of the coal mill separator of the present application;

[0028] Figure 3 It is a schematic view of the three-dimensional structure of the coal mill separator of the present application; Figure 2 It is an enlarged schematic view of the local structure at A in the present application;

[0029] Figure 4 It is an enlarged schematic view of the local structure at B in the present application; Figure 2 It is an enlarged schematic view of the local structure at B in the present application;

[0030] Figure 5 It is an enlarged schematic view of the local structure at C in the present application; Figure 2 It is an enlarged schematic view of the local structure at C in the present application;

[0031] Figure 6It is the three-dimensional structure schematic view of the coal mill separator of the present application;

[0032] Figure 7 It is the three-dimensional structure schematic view of the coal mill separator of the present application Figure 6 It is the local structure enlarged schematic view of D in the present application;

[0033] Figure 8 It is the three-dimensional structure schematic view of the coal mill separator of the present application Figure 6 It is the local structure enlarged schematic view of E in the present application;

[0034] Figure 9 It is the three-dimensional structure schematic view of the coal mill separator of the present application

[0035] Figure 10 It is the three-dimensional structure schematic view of the coal mill separator of the present application Figure 9 It is the local structure enlarged schematic view of F in the present application;

[0036] Figure 11 It is the three-dimensional structure schematic view of the coal mill separator of the present application

[0037] In the figure:

[0038] 1, shell; 2, stationary blade; 3, rotating blade; 4, static blade adjusting mechanism; 41, dust blocking cavity; 42, transmission gear ring; 43, adjusting motor; 44, driving gear; 45, driven shaft; 46, driven gear; 5, rotating blade driving control mechanism; 51, forward and reverse rotation driving motor; 52, driving pipe; 521, transmission ring; 522, insertion slot; 523, pressure spring; 53, control disc; 531, extension slot; 54, rotating frame; 541, adjusting cavity; 55, forward rotation transmission structure; 551, inner ratchet ring; 552, forward rotation transmission block; 56, reverse rotation control structure; 561, inner ratchet outer gear ring; 562, reverse rotation transmission block; 563, intermediate gear; 564, inner and outer gear ring; 565, driven gear; 566, rotating rod; 57, reverse rotation limiting structure; 571, support ring; 572, connecting plate; 573, sliding block; 574, friction plate; 575, reset spring; 6, coal inlet pipe; 7, material return hopper; 71, support rod; 72, connecting rod; 8, distributor; 81, powder outlet pipe; 82, spiral spoiler; 83, disturbance rod. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0040] Embodiment one: please refer to Figure 1 , Figure 2 andFigure 6 and Figure 9 The application provides a medium-speed vertical coal mill separator with intelligent regulation, which comprises a shell 1, static blades 2, rotating blades 3, a static blade adjusting mechanism 4, a rotating blade driving control mechanism 5 and a coal feeding pipe 6, the static blades 2 and the rotating blades 3 are both arranged in the interior of the shell 1, the static blade adjusting mechanism 4 is used for controlling the inclination angle adjustment of the static blades 2, and the rotating blade driving control mechanism 5 is used for controlling the rotation of the rotating blades 3 and the inclination angle adjustment of the rotating blades 3.

[0041] The rotating blade driving control mechanism 5 comprises a driving pipe 52, a control disc 53, a rotating frame 54 and a forward-reverse rotation control assembly, the driving pipe 52 is rotationally arranged in the interior of the shell 1, the control disc 53 is sleeved on the outer wall of the driving pipe 52, the rotating frame 54 is fixedly arranged on the exterior of the control disc 53, the rotating blades 3 are rotationally arranged on the rotating frame 54, and the forward-reverse rotation control assembly is arranged on the control disc 53 and used for driving the rotating frame 54 to rotate along with the driving pipe 52 when the driving pipe 52 rotates forward and for keeping the rotating frame 54 stationary while the rotating blades 3 rotate along with the driving pipe 52 when the driving pipe 52 rotates reversely.

[0042] The interior of the shell 1 is provided with a return hopper 7, and the coal feeding pipe 6 is arranged in the interior of the driving pipe 52 and fixedly connected with the return hopper 7.

[0043] As can be seen from the above, the medium-speed vertical coal mill separator has the shell 1 as a support structure, which provides installation space and an isolated environment for the internal components. The static blades 2 can be adjusted in inclination angle under the control of the static blade adjusting mechanism 4, preliminarily guide the airflow direction and create conditions for the separation of coal powder. The rotating blades 3 are controlled by the rotating blade driving control mechanism 5, which can not only adjust the rotating speed but also control the inclination angle, further screen and grade the coal powder through the centrifugal force generated by the rotation and improve the separation precision. When the driving pipe 52 of the rotating blade driving control mechanism 5 rotates forward, the forward-reverse rotation control assembly drives the rotating frame 54 and the rotating blades 3 to rotate synchronously, forms a dynamic separation field and enables the coal powder to be separated under the action of the centrifugal force and the airflow. When the driving pipe 52 reverses, the rotating frame 54 is stationary, only the rotating blades 3 rotate along with the driving pipe 52 and different separation effects are realized. The coal feeding pipe 6 is responsible for feeding raw coal into the separator, the return hopper 7 collects the coarse coal powder that does not meet the fineness requirement and sends it back to the coal mill for regrinding, improves the utilization rate of coal, and all the parts work cooperatively to achieve flexible adjustment of the fineness of the coal powder and optimized distribution of the airflow, thereby improving the working efficiency of the coal mill and the quality of the coal powder.

[0044] When using this device, the outer casing 1 is installed at the top of the medium-speed vertical coal mill. The coal blocks discharged from the lower end of the coal inlet pipe 6 and the coarse coal powder discharged from the lower end of the return hopper 7 fall into the coal mill for grinding. The fine powder produced by the grinding of the coal mill is conveyed upward through the internal air supply structure and enters the separator from between the return hopper 7 and the outer casing 1. After being separated by the stationary blades 2 and the rotating blades 3 in sequence, the qualified fine coal powder is discharged from the powder outlet pipe 81.

[0045] Example 2: Figure 2 , Figure 3 , Figures 6-10 As shown, the difference between this embodiment and the above embodiment is that the forward and reverse rotation control component includes a forward rotation transmission structure 55. The forward rotation transmission structure 55 includes an inner ratchet ring 551 and a forward rotation transmission block 552. The inner ratchet ring 551 is fixedly installed on the inner side wall of the control disk 53, and ratchet teeth are provided on the inner side of the inner ratchet ring 551. The forward rotation transmission block 552 is slidably installed on the outer wall of the drive tube 52, and the forward rotation transmission block 552 is adapted to be inserted into the ratchet teeth of the inner ratchet ring 551.

[0046] The forward and reverse rotation control assembly includes a reverse rotation control structure 56, which comprises an internal ratchet gear ring 561, a reverse rotation transmission block 562, an intermediate gear 563, internal and external gear rings 564, and a driven gear 565. The internal ratchet gear ring 561 is rotatably mounted on the inner side wall of the control panel 53, and ratchet teeth and gear teeth are respectively provided on its inner and outer sides. The reverse rotation transmission block 562 is slidably mounted on the outer wall of the drive tube 52, and the reverse rotation transmission block 562 is adapted to and inserted into the ratchet teeth of the internal ratchet gear ring 561. Both the reverse rotation transmission block 562 and the forward rotation transmission block 552 have a ramp surface at the end away from the drive tube 52, and the reverse rotation transmission block 562 and the forward rotation transmission block 552 have... The ramp surfaces face opposite directions. An extension groove 531 is provided on the outer wall of the control panel 53. An adjustment cavity 541 is provided inside the rotating frame 54. The interior of the extension groove 531 is connected to the interior of the adjustment cavity 541. The inner and outer gear rings 564 and the driven gear 565 are rotatably mounted inside the adjustment cavity 541. A rotating rod 566 is fixedly mounted on the driven gear 565. The rotating rod 566 is rotatably mounted inside the adjustment cavity 541, and the end of the rotating rod 566 extends through the inner wall of the adjustment cavity 541 to the outside and is fixedly connected to the rotating blade 3. The intermediate gear 563 is rotatably mounted inside the extension groove 531 and is meshed with the inner ratchet outer gear ring 561 and the inner and outer gear rings 564, respectively.

[0047] A transmission ring 521 is fixedly installed on the outer wall of the drive tube 52. A slot 522 is opened on the outer wall of the transmission ring 521. A pressure spring 523 is fixedly installed at the end of the slot 522. The forward transmission block 552 and the reverse transmission block 562 are slidably inserted into the inside of the slot 522, and the forward transmission block 552 and the reverse transmission block 562 are respectively fixedly connected to the pressure spring 523.

[0048] The positive and negative rotation control assembly further comprises a negative rotation limiting structure 57, which comprises a support ring 571, a connecting plate 572, a sliding block 573, a friction plate 574 and a return spring 575. The rotating frame 54 is rotatably lapped on the upper surface of the support ring 571, and the connecting plate 572 is fixedly installed on the support ring 571. The sliding block 573 is slidingly installed on the connecting plate 572. The friction surface of the friction plate 574 and the outer side wall of the rotating frame 54 are provided with mutually adapted friction surfaces. The friction plate 574 is fixedly installed on the end of the sliding block 573. The two ends of the return spring 575 are fixedly connected with the sliding block 573 and the connecting plate 572 respectively.

[0049] As can be seen from the above, when the driving pipe 52 rotates positively, the pressure spring 523 pushes the positive rotation transmission block 552 to insert into the ratchet of the inner ratchet ring 551, so that the control disc 53 rotates synchronously with the driving pipe 52, drives the rotating frame 54 and the rotating vane 3 to rotate as a whole, and realizes dynamic separation. At this time, the inclined surface of the negative rotation transmission block 562 is in contact with the ratchet of the inner ratchet outer tooth ring 561. Because the directions of the inclines are opposite, the negative rotation transmission block 562 is extruded back into the insertion groove 522 and is disengaged from the inner ratchet outer tooth ring 561. When the driving pipe 52 rotates reversely, the friction plate 574 of the negative rotation limiting structure 57 is pressed against the rotating frame 54 through the return spring 575 to limit the rotation of the rotating frame 54. At the same time, the negative rotation transmission block 562 is inserted into the ratchet of the inner ratchet outer tooth ring 561. The torque of the driving pipe 52 is transmitted to the rotating vane 3 through the driving pipe 52, the negative rotation transmission block 562, the inner ratchet outer tooth ring 561, the intermediate gear 563, the inner and outer tooth ring 564, the driven gear 565 and the rotating rod 566. In this process, the angle of the rotating vane 3 is adjusted by the rotation of the rotating rod 566, while the rotating frame 54 remains stationary, forming a special working condition of “fixed frame and rotating vane”.

[0050] When the driving pipe 52 rotates reversely, the friction surface of the friction plate 574 and the rotating frame 54 provides resistance to ensure that the rotating frame 54 does not rotate with the driving pipe 52. The return spring 575 ensures that the friction plate 574 is disengaged during positive rotation to avoid affecting normal transmission.

[0051] Two working modes are realized by a set of mechanisms. During positive rotation, the rotating centrifugal force is used to classify the coal powder. During reverse rotation, the angle of the vane is adjusted to optimize the airflow distribution, which significantly improves the adaptability and separation efficiency of the separator.

[0052] As shown in Figure 2 , Figure 4 , Figure 5 The difference between the present embodiment and the above-mentioned embodiments is that a support rod 71 is fixedly connected between the shell 1 and the material return hopper 7, a connecting rod 72 is fixedly connected between the coal inlet pipe 6 and the material return hopper 7, and the connecting plate 572 is fixedly connected with the upper end of the material return hopper 7.

[0053] From the above, by setting the support rod 71 and the connecting rod 72, so that the coal pipe 6 and the shell 1 fixed, while ensuring the size of the gap through the coal powder unchanged, the rigid connection of the support rod 71 and the connecting rod 72 ensure that the position of the return funnel 7 and the coal pipe 6 is stable during the process of adjusting the static blade, avoid uneven distribution of coal powder caused by vibration.

[0054] The static blade 2 is arranged between the inner top wall of the shell 1 and the top of the return funnel 7, and the static blade adjusting mechanism 4 comprises a dust blocking cavity 41, a transmission gear ring 42, an adjusting motor 43, a driving gear 44, a driven shaft 45 and a driven gear 46. The dust blocking cavity 41 is arranged on the inner top wall of the shell 1, the transmission gear ring 42 is rotatably installed inside the dust blocking cavity 41, the adjusting motor 43 is fixedly installed outside the shell 1, and the driving shaft of the adjusting motor 43 is fixedly connected with the driving gear 44. The driven shaft 45 is rotatably installed inside the dust blocking cavity 41, and extends to the inside of the shell 1 through the inner bottom wall of the dust blocking cavity 41 and is fixedly connected with the static blade 2. The driving gear 44 and the driven gear 46 are both meshingly connected with the transmission gear ring 42.

[0055] From the above, when the adjusting motor 43 is started, the driving gear 44 drives the transmission gear ring 42 to rotate, and the driven gear 46 drives the driven shaft 45 to rotate synchronously, so that the angle of the static blade 2 is uniformly adjusted.

[0056] Embodiment four: as shown in Figure 9 and Figure 11 The difference between the present embodiment and the above-mentioned embodiments is that the top of the shell 1 is fixedly installed with a distributor 8, the bottom of the distributor 8 extends into the inside of the shell 1, and the bottom of the distributor 8 is arranged on the inner side of the rotating blade 3. The upper end of the distributor 8 is installed with a plurality of powder outlet pipes 81 arranged in an annular array, and the upper part of the distributor 8 is arranged in an inverted conical shape. The inner wall of the distributor 8 is provided with a helical spoiler 82.

[0057] From the above, the inverted conical upper part of the distributor 8 utilizes the gradually expanding flow passage to reduce the air flow velocity, and the helical spoiler 82 guides the air flow to form a helical upward motion, thereby strengthening the mixing effect of the coal powder and air.

[0058] The driving pipe 52 is rotatably connected with the distributor 8, and the outer surface of the driving pipe 52 inside the distributor 8 is fixedly installed with a disturbance rod 83.

[0059] From the above, the rotating disturbance rotates synchronously with the driving pipe 52, which can break the coal powder agglomerates and improve the particle dispersion degree. At the same time, through the disturbance effect, the coal powder particles are dispersed and close to the inverted conical inner wall of the upper part of the distributor 8.

[0060] The rotating blade driving control mechanism 5 further comprises a forward and reverse rotation driving motor 51, which is installed outside the distributor 8. The driving end of the forward and reverse rotation driving motor 51 and the driving pipe 52 are drivingly connected through a transmission belt wheel.

[0061] As can be seen from the above, by providing the forward / reverse rotation driving motor 51, the driving pipe 52 can be controlled to rotate forward or reverse.

[0062] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since the scope of the application will be defined with respect to the appended claims and equivalents thereof, which can include other embodiments.

Claims

1. An intelligent controllable medium speed vertical coal mill classifier, comprising a housing, stationary vanes, rotating vanes, a stationary vane adjustment mechanism, a rotating vane drive control mechanism, and a coal feed pipe, characterized in that: The stationary blade and the rotating blade are both installed in the interior of the shell, the stationary blade adjusting mechanism is used for controlling the inclination angle adjustment of the stationary blade, the rotating blade driving control mechanism is used for controlling the rotation of the rotating blade and can control the inclination angle adjustment of the rotating blade; The rotating blade driving control mechanism comprises a driving pipe, a control disc, a rotating frame and a forward and reverse rotation control assembly, the driving pipe is rotationally arranged in the interior of the shell, the control disc is sleeved on the outer wall of the driving pipe, the rotating frame is fixedly installed on the exterior of the control disc, the rotating blade is rotationally arranged on the rotating frame, and the forward and reverse rotation control assembly is installed on the control disc and is used for driving the rotating frame to rotate with the driving pipe when the driving pipe rotates forward and to keep the rotating frame stationary while the rotating blade rotates with the driving pipe when the driving pipe reverses. The interior of the shell is provided with a material returning hopper, and the coal inlet pipe is arranged in the interior of the driving pipe and is fixedly connected with the material returning hopper. The forward and reverse rotation control assembly comprises a forward rotation transmission structure, the forward rotation transmission structure comprises an inner ratchet ring and a forward rotation transmission block, the inner ratchet ring is fixedly installed on the inner side wall of the control disc, and the inner side of the inner ratchet ring is provided with a ratchet, the forward rotation transmission block is slidingly installed on the outer wall of the driving pipe, and the forward rotation transmission block is adaptively inserted with the ratchet of the inner ratchet ring. The forward and reverse rotation control assembly comprises a reverse rotation control structure, the reverse rotation control structure comprises an inner ratchet outer tooth ring, a reverse rotation transmission block, an intermediate gear, an inner and outer tooth ring and a passive gear, the inner ratchet outer tooth ring is rotationally installed on the inner side wall of the control disc, and the inner and outer sides of the inner ratchet outer tooth ring are respectively provided with a ratchet and a gear tooth, the reverse rotation transmission block is slidingly installed on the outer wall of the driving pipe and is adaptively inserted with the ratchet of the inner ratchet outer tooth ring, and the ends of the reverse rotation transmission block and the forward rotation transmission block away from the driving pipe are both provided with inclined surfaces, and the inclined surfaces on the reverse rotation transmission block and the forward rotation transmission block face in opposite directions. The outer side wall of the control disc is provided with an extension groove, the interior of the rotating frame is provided with an adjusting cavity, the interior of the extension groove is in communication with the interior of the adjusting cavity, the inner and outer tooth ring and the passive gear are both rotationally installed in the interior of the adjusting cavity, a rotating rod is fixedly installed on the passive gear, the rotating rod is rotationally installed in the interior of the adjusting cavity, the end of the rotating rod extends to the outside through the inner wall of the adjusting cavity and is fixedly connected with the rotating blade, and the intermediate gear is rotationally installed in the interior of the extension groove and is in meshing connection with the inner ratchet outer tooth ring and the inner and outer tooth ring respectively.

2. A smart regulated medium speed vertical coal mill classifier as claimed in claim 1, wherein: The outer wall of the driving pipe is fixedly installed with a transmission ring, the outer side wall of the transmission ring is provided with a slot, the end of the slot is fixedly installed with a pressure spring, and the forward rotation transmission block and the reverse rotation transmission block are both slidingly inserted in the interior of the slot and are fixedly connected with the pressure spring respectively.

3. A smart regulated medium speed vertical coal mill classifier as claimed in claim 1, wherein: The reverse rotation limiting structure comprises a supporting ring, a connecting plate, a sliding block, a friction plate and a return spring, the rotating frame is rotatably lapped on the upper surface of the supporting ring, the connecting plate is fixedly installed on the supporting ring, the sliding block is slidingly installed on the connecting plate, the friction surface of the friction plate is provided with a mutually adaptive friction surface with the outer side wall of the rotating frame, and the friction plate is fixedly installed on the end of the sliding block, and the two ends of the return spring are fixedly connected with the sliding block and the connecting plate respectively.

4. A smart regulated medium speed vertical coal mill classifier as claimed in claim 3, wherein: The supporting rod is fixedly connected between the shell and the return funnel, the connecting rod is fixedly connected between the coal inlet pipe and the return funnel, and the connecting plate is fixedly connected with the upper end of the return funnel.

5. A smartly regulated medium speed vertical coal mill classifier as claimed in claim 1, wherein: The stationary blade is arranged between the inner top wall of the shell and the top of the return funnel, the stationary blade adjusting mechanism comprises a dust blocking cavity, a transmission gear ring, an adjusting motor, a driving gear, a driven shaft and a driven gear, the dust blocking cavity is arranged on the inner top wall of the shell, the transmission gear ring is rotatably installed in the dust blocking cavity, the adjusting motor is fixedly installed on the outside of the shell, the driving shaft of the adjusting motor is fixedly connected with the driving gear, the driven shaft is rotatably installed in the dust blocking cavity, the driven shaft extends to the inside of the shell through the inner bottom wall of the dust blocking cavity and is fixedly connected with the stationary blade, and the driving gear and the driven gear are in meshing connection with the transmission gear ring.

6. A smart regulated medium speed vertical coal mill classifier as claimed in claim 1, wherein: The distributor is fixedly installed on the top of the shell, the bottom of the distributor extends to the inside of the shell, the bottom of the distributor is arranged on the inner side of the rotating blade, the upper end of the distributor is provided with the powder outlet pipes arranged in an annular array, the upper part of the distributor is arranged in an inverted conical shape, and the inner wall of the distributor is provided with a spiral spoiler.

7. A smart regulated medium speed vertical coal mill classifier as claimed in claim 6, wherein: The driving pipe is rotatably connected with the distributor, and the outer surface of the driving pipe in the inside of the distributor is fixedly installed with the disturbance rod.

8. A smart regulated medium speed vertical coal mill classifier as claimed in claim 7, wherein: The rotating blade driving control mechanism further comprises a forward and reverse rotation driving motor, the forward and reverse rotation driving motor is installed on the outside of the distributor, and the driving end of the forward and reverse rotation driving motor is drivingly connected with the driving pipe through a transmission belt pulley.

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