CN212418149U

CN212418149U - High-yield environment-friendly flour mill

Info

Publication number: CN212418149U
Application number: CN202021198826.0U
Authority: CN
Inventors: 卢乐民
Original assignee: Guilin Hongcheng Mining Equipment Manufacture Co
Current assignee: Guilin Hongcheng Mining Equipment Manufacture Co
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-01-29
Anticipated expiration: 2030-06-24

Abstract

The utility model relates to a high-yield environment-friendly flour mill, which comprises a base, a classifier, a plum blossom stand, a driving device, a grinding roller assembly and an air return box; a grinding ring is fixed at the upper part in the base; the cover cylinder is fixed on the upper part of the base, and the grader is fixed on the upper part of the cover cylinder; the plum blossom rack is rotatably arranged in the cover cylinder, and the driving device is arranged below the base and connected with the plum blossom rack through the central shaft rack and drives the plum blossom rack to rotate; the upper part of the grinding roller assembly is fixed at a corresponding position on the plum blossom frame, the grinding roller at the lower part of the grinding roller assembly extends downwards into the base and corresponds to the position of the grinding ring, and the grinding roller assembly is driven by the plum blossom frame to roll along the inner wall of the grinding ring so as to grind the materials shoveled upwards by the shovel blade into dust; the air return box wraps the outer side of the base, and air flow of the air blower is introduced to the upper portion of the base through the air return box. This milling machine joins with the air current by original material before the grinding and changes into the material and joins with the air current after the grinding to avoid material and air current mutual interference, make milling machine during operation host computer and fan electric current maximize simultaneously.

Description

High-yield environment-friendly flour mill

Technical Field

The utility model relates to a milling equipment field, concretely relates to high yield environmental protection milling machine.

Background

The existing pendulum flour mill has 3-6 grinding roller assemblies, and is installed on the plum blossom frame by the central shaft frame device, the plum blossom frame is driven by the driving device under the central shaft frame device to rotate, the grinding ring is fixed on the base, because the rotation generates centrifugal force, the grinding roller is pressed to the grinding ring and rolls on the inner surface, the material enters the interior from the side part of the cover cylinder through the feeder, and is shoveled by the shovel blade and crushed by the grinding action between the grinding roller and the grinding ring. The air flow enters the lower part of the mill through a grid at the lower part of the base from the air return box, flows upwards through the grinding area of the grinding roller and the grinding ring under the action of negative pressure, and drives the ground material dust to ascend into a grading area (a grading machine) at the upper part of the mill, the graded powder is collected into a finished product by subsequent equipment, and the powder which does not pass through the grading falls back to the grinding area of the grinding roller for re-grinding due to gravity.

The existing pendulum type pulverizer is widely applied to pulverizing and pulverizing processing of materials with 80-400 meshes in the pulverizing range of various metal and non-metal ores due to large handling capacity, convenient adjustment of product fineness, simplicity, reliability and high performance-price ratio, but has the problems of low energy utilization rate, poor feeding control, suspension of a large amount of coarse powder in the pulverizer, idle running and idle running, frequent oiling of a grinding roller assembly, larger vibration noise of the pulverizer and the like. The reason for this is because design route and structure cause, the material that gets into the milling machine and the air current that gets into the milling machine coincide in milling machine base lower part, both influence each other in the milling machine, the feeding can block up the air current when many and flow, lead to air current resistance big on the earth and wind-force decline, cause unable simultaneous working at the optimum of main frame motor of milling machine and air-blower motor, it is big to lead to the fact the main frame feed not enough or main frame internal resistance big, output is on the earth, and the feed is not enough to cause empty idle running again, the increase of host computer vibrations noise. And because the material that gets into the milling machine coincides in milling machine base lower part with the air current that gets into the milling machine, under the disturbance of air current in the base, can form a large amount of middlings circulation suspension in the base, can't subside, so both increased and ground internal resistance, also can't make unqualified powder can grind again. And original grinding roller assembly structure adopts the drier oil lubrication, easily withers under the higher operating temperature in grinding, and old oil is not discharged when filling new oil, makes the bearing easily damage because of lubricated badly, and these problems influence milling powder output of milling machine equipment and improve, are difficult to reduce the energy consumption, reduce vibrations noise, and the maintenance is frequent, and it is underneath to use the reliability, finally also restricts current pendulum-type milling machine and popularize and apply and develop.

SUMMERY OF THE UTILITY MODEL

To sum up, for overcoming prior art's is not enough, the utility model aims to solve the technical problem that a high yield environmental protection milling machine is provided, and it provides the combination solution, through redesign grinding process route and host computer part structure, makes milling machine during operation host computer and air-blower electric current maximize, under the condition that does not change installed power, makes the grinding roller and grinds the material of shovel between the ring enough, does benefit to the efficiency performance of milling, promotes milling machine energy utilization, promotes output 20% -30%. Meanwhile, the grinding roller assembly is lubricated by adopting the thin oil with positioning, so that the vibration is reduced, the lubricating efficiency is improved, and the working reliability of the grinding roller and the whole machine is improved.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a high-yield environment-friendly flour mill comprises a base, a cover cylinder, a classifier, a plum blossom stand, a driving device, a grinding roller assembly and an air return box; a grinding ring is fixed at the upper part in the base; the cover cylinder is fixed on the upper part of the base, and the grader is fixed on the upper part of the cover cylinder; the plum blossom frame is rotatably arranged in the cover cylinder, and the driving device is arranged below the base and connected with the plum blossom frame through a central shaft frame and drives the plum blossom frame to rotate; the upper part of the grinding roller assembly is fixed at a corresponding position on the plum blossom frame, the lower part of the grinding roller assembly extends downwards into the base and corresponds to the position of the grinding ring, and the lower part of the grinding roller assembly is driven by the plum blossom frame to roll along the inner wall of the grinding ring, so that materials between the lower part of the grinding roller assembly and the grinding ring are ground into dust; a scraper knife which is used for shoveling materials and raising the materials between the grinding roller and the grinding ring is arranged in the base; the air return box is wrapped on the outer side of the base and used for introducing air flow to carry dust to flow upwards to the classifier to separate fine powder, and the coarse powder is ground again after being settled downwards in the hood cylinder; and the air return box leads air flow to the upper part of the base.

The utility model has the advantages that: compare with current pendulum-type milling machine, change the order that the material converged around with the air current grinding, join with the air current before the grinding by original material promptly and change into the material and join with the air current after the grinding to avoid material and air current mutual interference, make milling machine during operation host computer and air-blower current maximize simultaneously.

On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:

furthermore, the top of the air return box is higher than the top of the base, and an air inlet channel for introducing air flow to the upper side of the base is formed between the top of the air return box and the top of the base.

Further, the air return box comprises a peripheral plate, a conical ring section and an upper cover plate; the peripheral plate is of a ring-shaped structure which surrounds the outer side of the upper part of the base and is vertically arranged, and the top of the peripheral plate is higher than that of the base; the conical ring section is fixed at the bottom of the peripheral plate and is fixedly connected with the lower part of the base; the upper cover plate is horizontally arranged, one end of the upper cover plate is fixed to the top of the peripheral plate and forms a hollow air storage cavity together with the peripheral plate and the conical ring section in an enclosing mode, an air inlet channel is formed between the upper cover plate and the top of the base, an air inlet square circle is arranged on the peripheral plate and connected with an air blower to introduce air into the air storage cavity, and air flow is introduced to the upper portion of the base through the air inlet channel; the other end of the upper cover plate is provided with a short cylinder which is vertically upward and is fixedly connected with the corresponding position of the cover cylinder.

The beneficial effect of adopting the further scheme is that: most of air flow is converged with the powder after the material is ground through the air inlet channel, so that the material is converged with the air flow after being ground, and the mutual interference of the material and the air flow is avoided.

Further, the base comprises a base block and a conical cylinder; the conical cylinder is fixed on the base block, and a plurality of material returning holes are formed in the lower part of the conical cylinder along the circumferential direction; the upper end of the conical ring section is fixed at the bottom of the peripheral plate, the lower end of the conical ring section extends downwards towards the base in an inclined mode for a preset distance, the conical ring section is connected with a first flange through a section pipe, the first flange is fixed on the base block, and therefore materials mixed in the air sink in the air storage cavity and then enter the base through the material returning hole to be ground.

The beneficial effect of adopting the further scheme is that: the material sucked by the air blower is prevented from settling and accumulating in the air return box, and the airflow resistance in the air return box is further increased.

Furthermore, a first access door is arranged on the upper cover plate in an openable and closable manner.

The beneficial effect of adopting the further technical scheme is as follows: the maintenance of the interior of the air return box is convenient.

Furthermore, a falling channel is arranged in the cover cylinder and used for coarse powder to settle downwards so as to avoid the upward airflow from disturbing the inner cylinder of the downward settled coarse powder.

Further, the cover cylinder comprises a cylinder body, an inner cylinder, a feeding hole, a guide groove and a spiral plate; the bottom of the cylinder body is fixedly connected with the short cylinder, and the top of the cylinder body is fixedly connected with the bottom of the grader through a second flange; the inner cylinder is positioned in the cylinder, the air supply flow in the inner cylinder moves upwards, and a space is reserved between the inner cylinder and the cylinder to form the falling channel for the coarse powder to settle downwards; one end of the feed port is communicated to the inside of the inner cylinder, and the other end of the feed port sequentially penetrates through the falling channel and the cylinder and then is connected to the outside of the cylinder to input materials; the spiral plate is fixed in the falling channel and used for collecting the coarse powder which is settled downwards, the width of the spiral plate is equal to that of the falling channel, and the upper end and the lower end of the spiral plate are vertically aligned to isolate the falling channel from top to bottom;

the spiral plate is provided with a notch, the guide groove is positioned in the falling channel, the upper end of the guide groove is connected with the notch, the lower end of the guide groove vertically extends downwards to the bottom of the falling channel, and then the coarse powder collected by the spiral plate is discharged downwards between the lower part of the grinding roller assembly and the grinding ring and is ground again; the lower end of the guide groove is provided with a guide sloping plate; and a second access door is arranged on the barrel.

The beneficial effect of adopting the further technical scheme is as follows: under the effect of cover section of thick bamboo the middlings can be smoothly and subside fast, make between grinding roller and the grinding ring shovel material sufficient, be favorable to milling efficiency performance, promote milling machine energy utilization and rate, under the condition that does not change the installed power of grinding system, promote output.

Furthermore, the spiral plate is formed by connecting two semicircular arc plates in an up-and-down mode after the two semicircular arc plates are inclined, and each arc plate is provided with the notch; the notch, the guide groove and the material guide inclined plate are arranged in a one-to-one correspondence mode.

The beneficial effect of adopting the further technical scheme is as follows: the coarse powder deposited on the spiral plate is discharged downwards in time.

Further, the grinding roller assembly comprises a roller seat frame, a connecting shaft, a grinding roller and a supporting sleeve; the roller seat frame is rotatably sleeved at the lower part of the connecting shaft through a bearing, and the lower part of the roller seat frame extends downwards into the base and corresponds to the position of the grinding ring; the grinding roller is fixed at the lower part of the roller seat frame and is driven by the plum blossom rack to roll along the inner wall of the grinding ring; the supporting sleeve is fixedly sleeved on the upper portion of the connecting shaft, one side of the supporting sleeve is arranged on the plum blossom frame through the transverse denier shaft in a swinging mode, a vertical screw is arranged on the other side of the supporting sleeve, the lower end of the screw abuts against the corresponding position of the plum blossom frame, and then the roller seat frame swings relative to the grinding ring through rotation of the screw so as to adjust the gap between the grinding roller and the grinding ring.

The beneficial effect of adopting the further technical scheme is as follows: the positioning contact is controlled by the screw rod to adjust the gap between the grinding roller and the grinding ring, so that the impact noise can be effectively reduced, the vibration can be reduced, and the working reliability of the grinding roller and the whole machine can be improved.

Furthermore, the grinding roller assembly also comprises a middle sleeve cover, a mechanical seal, an upper sleeve cover and a bottom seal plate; a middle sleeve cover is fixedly sleeved on the connecting shaft corresponding to the position between the support sleeve and the roller seat frame, and the mechanical seal is fixedly sleeved on the connecting shaft corresponding to the position between the support sleeve and the middle sleeve cover; the upper sleeve cover is fixed on the connecting shaft and corresponds to the top of the supporting sleeve; the bottom sealing plate is fixed at the bottom of the roller seat frame and corresponds to the position below the connecting shaft.

The beneficial effect of adopting the further technical scheme is as follows: the grinding roller assembly is lubricated by thin oil, and a special sealing structure is adopted, so that the grinding roller assembly is better in lubricating effect and is not easy to leak oil.

Drawings

Fig. 1 is a cross-sectional view of the overall structure of the present invention;

FIG. 2 is a three-dimensional cross-sectional view of the return air box;

FIG. 3 is a three-dimensional view of the base;

FIG. 4 is a three-dimensional cross-sectional view of the shroud;

FIG. 5 is a top view of an arcuate plate;

FIG. 6 is a cross-sectional view of the grinding roll assembly;

FIG. 7 is a schematic view of the grinding roller assembly mounted on the ume stand.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a base, 2, a cover cylinder, 3, a grader, 4, a plum blossom frame, 5, a driving device, 6, a grinding roller assembly, 7, an air return box, 8, a grinding ring, 9, a central shaft frame, 10, a scraper knife, 11, an air inlet channel, 12, an outer peripheral plate, 13, a cone ring section, 14, an upper cover plate, 15, a section pipe, 16, a first flange, 17, an air inlet square circle, 18, a material return hole, 19, a first access door, 20, a cover cylinder, 21, a cylinder body, 22, an inner cylinder and 23, the device comprises a feed inlet, 24, a guide groove, 25, a notch, 26, a feed inclined plate, 27, an arc-shaped plate, 28, a second access door, 29, a roller seat frame, 30, a connecting shaft, 31, a grinding roller, 32, a support sleeve, 33, a bearing, 34, a transverse shaft, 35, a screw, 36, a middle sleeve cover, 37, a mechanical seal, 38, an upper sleeve cover, 39, a bottom sealing plate, 40, a flow guide grid, 41, a short cylinder, 42, a base block, 43, a conical cylinder, 44 and a second flange.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in figure 1, the high-yield environment-friendly pulverizer comprises a base 1, a cover cylinder 2, a classifier 3, a plum blossom frame 4, a driving device 5, a grinding roller assembly 6, an air return box 7, a central shaft frame 9 and a scraper knife 10. A grinding ring 8 is fixed at the upper part in the base 1. The cover cylinder 2 is fixed on the upper part of the base 1, and the grader 3 is fixed on the upper part of the cover cylinder 2. The plum blossom frame 4 is rotatably arranged in the cover cylinder 2, and the driving device 5 is arranged below the base 1 and is connected with and drives the plum blossom frame 4 to rotate through a central shaft bracket 9. The upper part of the grinding roller assembly 6 is fixed at a corresponding position on the plum blossom rack 4, the lower part of the grinding roller assembly 6 extends downwards to the position corresponding to the grinding ring 8 in the base 1, and the lower part of the grinding roller assembly 6 is driven by the plum blossom rack 4 to roll along the inner wall of the grinding ring 8, so that the material between the lower part of the grinding roller assembly 6 and the grinding ring 8 is ground into dust. A shovel blade 10 which shovels materials and raises the materials between the grinding roller 31 and the grinding ring 8 is arranged in the base 1. The air return box 7 is wrapped on the outer side of the base 1, air flow is introduced above the base 1, the introduced air flow carries dust to flow upwards into the classifier 3 to separate qualified fine powder, and unqualified coarse powder is ground again after being settled downwards in the cover cylinder 2 under the action of self gravity. A falling channel is arranged in the cover cylinder 2 and used for downward sedimentation of coarse powder so as to avoid the disturbance of upward airflow on the downward sedimentation coarse powder.

As shown in fig. 2, the top of the air return box 7 is higher than the top of the base 1, and an air inlet channel 11 for introducing air flow above the base 1 is formed between the top of the air return box 7 and the top of the base 1. The method comprises the following specific steps: the air return box 7 comprises an outer peripheral plate 12, a conical ring section 13 and an upper cover plate 14. The peripheral plate 12 is a ring-shaped structure which surrounds the outer side of the upper portion of the base 1 and is vertically arranged, and the top of the peripheral plate 12 is higher than the top of the base 1. The cone ring segment 13 is fixed at the bottom of the peripheral plate 12, and is connected with a first flange 16 through a segment pipe 15, and the first flange 16 is fixed at a corresponding position at the lower part of the base 1. The upper cover plate 14 is horizontally arranged, one end of the upper cover plate 14 is fixed on the top of the peripheral plate 12, and a hollow air storage cavity is defined by the upper cover plate 14, the peripheral plate 12 and the cone ring segment 13, and the air inlet channel 11 is formed between the upper cover plate 14 and the top of the base 1. The peripheral plate 12 is provided with an air inlet square circle 17, and the air inlet square circle 17 is connected with an air blower to introduce air into the air storage cavity and introduce airflow to the upper part of the base 1 through the air inlet channel 11. The other end of the upper cover plate 14 is provided with a short tube 41 which is vertically upward and is provided with a first access door 19 which can be opened and closed. The short cylinder 41 is connected to the corresponding position of the cover cylinder 2.

As shown in fig. 3, the base 1 includes a base block 42 and a conical cylinder 43. The conical cylinder 43 is fixed on the base block 42, and a plurality of material returning holes 18 are formed in the circumferential direction of the lower portion of the base 1. The upper end of the conical ring section 13 is fixed at the bottom of the peripheral plate 12, and the lower end extends downwards towards the base 1 in an inclined way for a preset distance, so that materials mixed in the air sink in the air storage cavity and then enter the base 1 through the material returning hole 18 for grinding. The mill is in an environment in which some particulate material is suspended and this particulate material is sucked into the return air box 7 by the blower. Under the effect of cone ring section 13, the material that inhales in return air box 7 falls more easily under self action of gravity, and rethread feed back hole 18 enters into base 1 and carries out the grinding to avoid being subsided by the inspiratory material of air-blower and piling up in return air box 7, and then cause return air box 7 internal gas flow resistance to strengthen.

As shown in fig. 4, the mantle 2 includes a cylinder 21, an inner cylinder 22, a feed port 23, a guide groove 24, and a spiral plate. The bottom of the cylinder 21 is fixedly connected with the short cylinder 41, and the top of the cylinder is fixedly connected with the bottom of the grader 3 through a second flange 44. The inner cylinder 22 is positioned in the cylinder 21, air flows are supplied to move upwards in the inner cylinder 22, a space is reserved between the inner cylinder 22 and the cylinder 21 to form the falling channel for coarse powder to settle downwards, and a flow guide grid 40 is arranged at the lower part in the inner cylinder 22. One end of the feed inlet 23 is communicated to the inner cylinder 22, and the other end of the feed inlet passes through the falling channel and the cylinder 21 in sequence and then is connected to the outside of the cylinder 21 to input materials. The spiral plate is fixed in the falling passage for collecting the coarse powder which is settled downwards, and the width of the spiral plate is equal to the width of the falling passage, and the upper end and the lower end of the spiral plate are vertically aligned to isolate the falling passage from top to bottom. The spiral plate is provided with a gap 25, the guide groove 24 is positioned in the falling channel, the upper end of the guide groove 24 is connected with the gap 25, the lower end of the guide groove extends vertically downwards to the bottom of the falling channel, and therefore the coarse powder collected by the spiral plate is discharged downwards between the lower part of the grinding roller assembly 6 and the grinding ring 8 and is ground again. The lower end of the guide groove 24 is provided with a material guide sloping plate 26. A second access door 28 is arranged on the cylinder 21. Preferably: the spiral plate is formed by connecting two semicircular arc plates 27 up and down after inclining, as shown in fig. 5, each arc plate 27 is provided with the notch 25, and the notch 25, the guide groove 24 and the material guide sloping plate 26 are arranged in a one-to-one correspondence manner.

As shown in fig. 6 and 7, the grinding roller assembly 6 includes a roller bracket 29, a connecting shaft 30, a grinding roller 31, and a retainer 32. The roller seat frame 29 is rotatably fitted around the lower portion of the connecting shaft 30 through a bearing 33, and the lower portion of the roller seat frame 29 extends downward into the base 1 at a position corresponding to the grinding ring 8. The grinding roller 31 is fixed at the lower part of the roller seat frame 29 and rolls along the inner wall of the grinding ring 8 under the driving of the plum blossom rack 4. The supporting sleeve 32 is fixedly sleeved on the upper part of the connecting shaft 30, one side of the supporting sleeve 32 is arranged on the plum blossom frame 4 through a transverse shaft 34 in a swinging mode, a vertical screw 35 is arranged on the other side of the supporting sleeve, the lower end of the screw 35 props against the corresponding position of the plum blossom frame 4, and then the roller seat frame 29 swings relative to the grinding ring 8 through rotating the screw 35 so as to adjust the gap between the grinding roller 31 and the grinding ring 8. The grinding roller assembly 6 further comprises a middle sleeve cover 36, a mechanical seal 37, an upper sleeve cover 38 and a bottom sealing plate 39. A middle sleeve cover 36 is fixedly sleeved on the connecting shaft 30 corresponding to the position between the support sleeve 32 and the roller seat frame 29, and the mechanical seal 37 is fixedly sleeved on the connecting shaft 30 corresponding to the position between the support sleeve 32 and the middle sleeve cover 36. The upper sleeve cover 38 is fixed on the connecting shaft 30 and corresponds to the top of the supporting sleeve 32, and the bottom sealing plate 39 is fixed at the bottom of the roller seat frame 29 and corresponds to the position below the connecting shaft 30. The combined sealing structure in the middle of the grinding roller assembly 6 adopts a dynamic and static combined sealing ring, namely a mechanical seal 37, the dynamic and static combined sealing ring is respectively arranged on the fixed part supporting sleeve 32 and the moving part middle sleeve cover 36, and the combined sealing ring is always in plane contact with the corresponding part under the action of certain elastic force, so that the oil leakage caused by radial or axial micro-motion in the working process is avoided.

The operation of the mill is described in more detail below:

firstly, the gap between the grinding roller 31 and the grinding ring 8 is adjusted according to the actual production condition so as to reduce the noise generated by the impact between the grinding roller 31 and the grinding ring 8, reduce the vibration and improve the working reliability of the grinding roller and the whole machine. The method comprises the following specific steps: the screw 35 is rotated to change the height of the lower end of the screw contacting the plum blossom frame 4, so that the roller seat frame 29 swings relative to the grinding ring 8, and finally the gap between the grinding roller 31 and the grinding ring 8 is adjusted until the gap between the grinding roller 31 and the grinding ring 8 reaches the preset requirement. After the adjustment, on the premise of ensuring that the thickness of the material layer is sufficiently rolled, the empty impact collision between the grinding roller 31 and the grinding ring 8 is reduced, and the vibration and the noise are reduced.

After the gap between the grinding roller 31 and the grinding ring 8 is adjusted, the flour mill is started, the driving device 5 drives the plum blossom frame 4 to rotate through the central shaft frame 9, the plum blossom frame 4 drives the grinding roller assembly 6 to synchronously rotate, and the grinding ring is fixed on the base and does not move. In the process of the rotation of the grinding roller assembly 6, due to the centrifugal force generated by the rotation, the grinding roller 31 is pressed against the grinding ring 8 and rolls on the inner surface of the grinding ring 8 in a self-rotating manner, and the material enters the interior of the mill through the feeding port 23 at the side part of the cover cylinder 20 by the feeding machine and is shoveled by the shovel blade 10 to rise between the grinding roller 31 and the grinding ring 8 to be ground into dust (fine powder and coarse powder). In the grinding process, the external air forms airflow under the action of the blower, enters the air return box 7, enters the cover cylinder 2 from the upper part of the base 1 through the air inlet channel 11, and is finally upwards sprayed out through the flow guide grid 40 in the inner cylinder 22. When the airflow is above the base 1, it mixes with the ground and lifted dust and under negative pressure the airflow lifts the dust up into the classifier 3 area at the top of the mill. Compare with current pendulum-type milling machine, this milling machine changes the order that material and air current grinding front and back converged, joins with the air current by original material before the grinding and changes into the material and join with the air current after the grinding promptly to avoid material and air current mutual interference, make milling machine during operation 5's host computer and air-blower current maximize simultaneously.

After the dust rises into the classifier 3 at the top of the mill, the qualified dust classified by the classifier 3 is collected by subsequent equipment into finished product (fine powder), and the coarse powder which does not pass classification is collected by the hood 20 and falls back to the milling area between the milling roller 31 and the milling ring 8 for re-milling, as follows: under the action of the centrifugal force of the rotating airflow generated by the rotation of the pulverizer and the classifier 3, coarse powder is thrown out of the outer side of the inner cylinder 22 due to large mass and corresponds to the upper part of a falling channel (a gap is reserved between the inner cylinder 22 and the cylinder 21 to form the falling channel for downward sedimentation of the coarse powder), and then under the action of the self gravity and the friction force of the outer side wall of the inner cylinder 22 and the inner side wall of the cylinder 21, the coarse powder slides down between the outer side wall of the inner cylinder 22 and the inner side wall of the cylinder 21. Because the arc plate 27 isolates the falling channel from top to bottom, most of the air flow rises in the inner cylinder 22 under the shielding of the inner cylinder 4, coarse powder can smoothly fall onto the arc plate 27 without being disturbed by the air flow, and flows downwards into the guide groove 24 through the notch 25 under the guiding of the inclined arc plate 27, and falls into the base 1 under the guiding of the guide sloping plate 26 through the outlet of the guide groove 24, finally, the coarse powder can fall into the base 1 as soon as possible, the suspension phenomenon of the coarse powder is reduced, the shoveling between the grinding roller and the grinding ring is sufficient, the grinding efficiency is favorably exerted, the energy utilization rate of the grinding mill is improved, and the yield is improved under the condition that the installed power of the grinding system is not changed.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-yield environment-friendly flour mill comprises a base (1), a cover cylinder (2), a classifier (3), a plum blossom stand (4), a driving device (5), a grinding roller assembly (6) and an air return box (7); a grinding ring (8) is fixed at the upper part in the base (1); the cover cylinder (2) is fixed on the upper part of the base (1), and the grader (3) is fixed on the upper part of the cover cylinder (2); the plum blossom frame (4) is rotatably arranged in the cover cylinder (2), and the driving device (5) is arranged below the base (1) and is connected with and drives the plum blossom frame (4) to rotate through a central shaft frame (9); the upper part of the grinding roller assembly (6) is fixed at a corresponding position on the plum blossom rack (4), the lower part of the grinding roller assembly (6) extends downwards to the position in the base (1) corresponding to the grinding ring (8), and the lower part of the grinding roller assembly (6) rolls along the inner wall of the grinding ring (8) under the driving of the plum blossom rack (4), so that the material between the lower part of the grinding roller assembly (6) and the grinding ring (8) is ground into dust; a shovel blade (10) which shovels and raises materials between the grinding roller (31) and the grinding ring (8) is arranged in the base (1); the air return box (7) is wrapped on the outer side of the base (1) and is used for introducing air flow to carry dust to flow upwards into the classifier (3) to separate fine powder, and coarse powder is ground again after being settled downwards in the hood cylinder (2); the air return box is characterized in that airflow is introduced into the upper part of the base (1) through the air return box (7).

2. A high-yield environmentally friendly mill according to claim 1, characterized in that the top of the air return box (7) is higher than the top of the base (1), and an air inlet channel (11) for letting in air flow above the base (1) is formed between the top of the air return box (7) and the top of the base (1).

3. A high-yield environmentally friendly mill according to claim 2, characterized in that the gas return box (7) comprises a peripheral plate (12), a conical ring section (13) and an upper cover plate (14); the peripheral plate (12) is a ring-shaped structure which surrounds the outer side of the upper part of the base (1) and is vertically arranged, and the top of the peripheral plate (12) is higher than that of the base (1); the conical ring section (13) is fixed at the bottom of the peripheral plate (12) and is fixedly connected with the lower part of the base (1); the upper cover plate (14) is horizontally arranged, one end of the upper cover plate (14) is fixed to the top of the peripheral plate (12) and forms a hollow air storage cavity together with the peripheral plate (12) and the conical ring section (13), and the air inlet channel (11) is formed between the upper cover plate (14) and the top of the base (1); an air inlet square circle (17) is arranged on the peripheral plate (12), the air inlet square circle (17) is connected with an air blower to introduce air into the air storage cavity and introduce airflow above the base (1) through the air inlet channel (11); the other end of the upper cover plate (14) is provided with a short cylinder (41) which is vertically upward and is fixedly connected with the corresponding position of the cover cylinder (2).

4. A high-yield environmentally friendly mill according to claim 3, characterized in that the base (1) comprises a base block (42) and a cone (43); the conical cylinder (43) is fixed on the base block (42), and a plurality of material returning holes (18) are formed in the lower part of the conical cylinder along the circumferential direction; the upper end of awl ring section (13) is fixed the bottom of peripheral panel (12), its lower extreme court base (1) slant downwardly extending predetermined distance, and awl ring section (13) are connected with first flange (16) through section pipe (15), first flange (16) are fixed on base block (42), and then make the material that mix with in the air sink the back rethread in feed back hole (18) get into grind in base (1).

5. A high yield, environmentally friendly mill according to claim 3, characterized in that the upper cover plate (14) is provided with a first access door (19) that is openable and closable.

6. A high-yield, environmentally friendly mill according to claim 3, characterized in that a falling passage is provided in the mantle (2) and provides for downward settling of the coarse meal to avoid upward gas flow disturbing the downward settled coarse meal.

7. A high-yield environmentally friendly mill according to claim 6, characterized in that the mantle (2) comprises a cylinder (21), an inner cylinder (22), a feed inlet (23), a guide groove (24) and a spiral plate; the bottom of the cylinder body (21) is fixedly connected with the short cylinder (41), and the top of the cylinder body is fixedly connected with the bottom of the grader (3) through a second flange (44); the inner cylinder (22) is positioned in the cylinder body (21), the air supply flow in the inner cylinder moves upwards, a space is reserved between the inner cylinder (22) and the cylinder body (21) to form a falling channel for the coarse powder to settle downwards, and a flow guide grid (40) is arranged at the lower part in the inner cylinder (22); one end of the feed port (23) is communicated to the inner barrel (22), and the other end of the feed port sequentially penetrates through the falling channel and the barrel body (21) and then is connected to the outside of the barrel body (21) to input materials; the spiral plate is fixed in the falling channel and used for collecting the coarse powder which is settled downwards, the width of the spiral plate is equal to that of the falling channel, and the upper end and the lower end of the spiral plate are vertically aligned to isolate the falling channel from top to bottom;

the spiral plate is provided with a notch (25), the guide groove (24) is positioned in the falling channel, the upper end of the guide groove (24) is connected with the notch (25), the lower end of the guide groove vertically extends downwards to the bottom of the falling channel, and therefore the coarse powder collected by the spiral plate is downwards discharged between the lower part of the grinding roller assembly (6) and the grinding ring (8) and is ground again; the lower end of the guide groove (24) is provided with a material guide sloping plate (26); and a second access door (28) is arranged on the barrel body (21).

8. A high-yield environment-friendly pulverizer as claimed in claim 7, wherein said spiral plate is formed by connecting two semicircular arc plates (27) in an up-and-down manner after being inclined, and each arc plate (27) is provided with said notch (25); the notches (25), the guide grooves (24) and the material guide sloping plates (26) are arranged in a one-to-one correspondence manner.

9. A high yield environmental mill according to any one of claims 1 to 8, characterized in that the grinding roller assembly (6) comprises a roller stand (29), a connecting shaft (30), a grinding roller (31) and a retainer sleeve (32); the roller seat frame (29) is rotatably sleeved on the lower part of the connecting shaft (30) through a bearing (33), and the lower part of the roller seat frame (29) extends downwards to the position inside the base (1) and corresponding to the grinding ring (8); the grinding roller (31) is fixed at the lower part of the roller seat frame (29) and rolls along the inner wall of the grinding ring (8) under the drive of the plum blossom rack (4); the supporting sleeve (32) is fixedly sleeved on the upper portion of the connecting shaft (30), one side of the supporting sleeve (32) is arranged on the plum blossom frame (4) in a swinging mode through a transverse denier shaft (34), a vertical screw rod (35) is arranged on the other side of the supporting sleeve, the lower end of the screw rod (35) abuts against the corresponding position of the plum blossom frame (4), and then the roller seat frame (29) swings relative to the grinding ring (8) by rotating the screw rod (35) so as to adjust a gap between the grinding roller (31) and the grinding ring (8).

10. A high-yield environmentally friendly mill according to claim 9, wherein the grinding roller assembly (6) further comprises a center sleeve cover (36), a mechanical seal (37), an upper sleeve cover (38) and a bottom closure plate (39);

a middle sleeve cover (36) is fixedly sleeved on the connecting shaft (30) corresponding to the position between the supporting sleeve (32) and the roller seat frame (29), and the mechanical seal (37) is fixedly sleeved on the connecting shaft (30) corresponding to the position between the supporting sleeve (32) and the middle sleeve cover (36); the upper sleeve cover (38) is fixed on the connecting shaft (30) and corresponds to the top of the supporting sleeve (32); the bottom sealing plate (39) is fixed at the bottom of the roller seat frame (29) and corresponds to the position below the connecting shaft (30).