CN108672037B

CN108672037B - Superfine pulverizing device

Info

Publication number: CN108672037B
Application number: CN201810641353.8A
Authority: CN
Inventors: 周翔; 吴琴秀
Original assignee: Suzhou Jinyuansheng Intelligent Equipment Co ltd
Current assignee: Suzhou Jinyuansheng Intelligent Equipment Co ltd
Priority date: 2018-06-21
Filing date: 2018-06-21
Publication date: 2024-05-28
Anticipated expiration: 2038-06-21
Also published as: CN108672037A; CN118543418A

Abstract

The invention relates to an ultrafine grinding device which comprises a shell, a grinder arranged in a lower cavity of the shell and a classifier arranged in an upper cavity of the shell. The shell is provided with a feed inlet and an air inlet. The pulverizer comprises a vertical shaft, a plurality of pulverizing mechanisms and a first driving piece, wherein the vertical shaft is arranged in a rotating manner along the vertical direction and extends into the shell, the pulverizing mechanisms are connected with the vertical shaft, the first driving piece drives the vertical shaft to rotate, and the pulverizing mechanisms are arranged up and down along the vertical shaft. The crushing mechanism comprises a cutter disc arranged on the vertical shaft, a plurality of crushing cutters arranged on the cutter disc, and a gear ring sleeved on the periphery of the cutter disc, wherein crushing gaps are formed between the crushing cutters and the gear ring. According to the superfine grinding device, the classifier is additionally arranged to screen the material particles, and after the materials with larger particles are screened out, the screened materials are crushed again by using the plurality of crushing mechanisms, so that the crushing fineness and the crushing efficiency of the materials are improved.

Description

Superfine pulverizing device

Technical Field

The invention relates to an ultrafine grinding device.

Background

The crushing device is used for crushing large-size solid materials into material particles with required sizes, and the crushing device in the prior art can crush the materials, but has the problem that the crushed materials are not thoroughly crushed and the particle sizes of the crushed materials are uneven, so that the crushing requirement can be met by repeated crushing sometimes, and the crushing efficiency is lower.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an ultrafine grinding device which can grind materials in multiple stages and improve the grinding fineness and the grinding efficiency of the materials.

In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides an ultrafine grinding device, includes the casing, locates the rubbing crusher of casing lower chamber, locates the grader of casing upper chamber, feed inlet and air intake have been seted up on the casing, the rubbing crusher includes along vertical direction rotation setting and stretches out the vertical scroll of casing, with a plurality of rubbing crusher constructs that the vertical scroll is connected, drive vertical scroll pivoted first driving piece, a plurality of rubbing crusher constructs the edge the vertical scroll sets up from top to bottom, rubbing crusher constructs including locating on the vertical scroll cutterhead, locating a plurality of rubbing crusher sword on the cutterhead, cover are established the ring gear of cutterhead periphery, rubbing crusher with form crushing clearance between the ring gear.

Preferably, the outer diameter of the gear ring of the lower crushing mechanism is larger than that of the gear ring of the upper crushing mechanism, so that crushed material particles can flow upwards.

Preferably, the crushing gap of the lower crushing mechanism is larger than that of the upper crushing mechanism, so that the material particles with larger mass or larger volume thrown out by the classifier can enter the upper crushing mechanism for continuous crushing.

Preferably, the air intake is located the below of reducing mechanism, reducing mechanism with be equipped with material baffle between the air intake, material baffle is including the baffle body of seting up a plurality of vents, setting are in the aviation baffle of vent department, aviation baffle one end with baffle body is connected, and the other end slope upwards extends, can lead to the wind, also can prevent simultaneously that material granule from getting into the vent.

Preferably, a muffler and an air filter are arranged at the air inlet.

Preferably, the superfine grinding device further comprises a feeding mechanism communicated with the feeding hole, wherein the feeding mechanism comprises a hopper, a feeding channel communicated with the hopper and the shell, and a screw conveyor arranged in the feeding channel.

Preferably, the classifier comprises a classifying wheel, a second driving piece for driving the classifying wheel to rotate and a discharging recoil air sleeve, wherein one end of the discharging recoil air sleeve is positioned in the shell and is opposite to the classifying wheel, and the other end of the discharging recoil air sleeve is positioned outside the shell.

Further, the classifying wheel comprises two impeller plates and a plurality of blades which are fixed between the two impeller plates and form a circle, a feeding gap is formed between every two adjacent blades, an inner cavity is formed at the inner side of each circle of blades, one impeller plate is connected with the second driving piece, a through hole communicated with the inner cavity is formed in the other impeller plate, the through hole is communicated with the discharging recoil air sleeve, and the section of each blade is 5-15 degrees in the radial direction of the impeller plate. When the classifying wheel rotates, vortex generated by the blades can be effectively reduced, wind resistance is reduced, material particles are conveniently thrown out of the classifying wheel, and then the classifying precision of the classifier is improved.

Further, the ejection of compact recoil gas cover includes the inner tube, overlaps to establish the outer tube outside the inner tube, locate the annular closed loop at inner tube and outer tube both ends, form confined cavity between inner tube, outer tube and the two closed loops, the inner chamber of inner tube is the discharge channel, set up on the outer tube with the air inlet that the cavity is linked together, the air inlet is located outside the casing, be close to set up a plurality of with the through-hole that the cavity is linked together on the closed loop of grading wheel one end.

Preferably, the superfine grinding device further comprises a support, a plurality of rollers are arranged at the lower end of the support, and the shell and the first driving piece are arranged on the support.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: according to the superfine grinding device, the classifier is additionally arranged to screen the material particles, and after the materials with larger particles are screened out, the screened materials are crushed again by using the plurality of crushing mechanisms, so that the crushing fineness and the crushing efficiency of the materials are improved.

Drawings

FIG. 1 is a schematic perspective view of an ultrafine grinding device of the invention;

FIG. 2 is a schematic front view of the superfine pulverizing apparatus of the present invention;

FIG. 3 is a schematic left view of the superfine pulverizing apparatus of the present invention;

FIG. 4 is a schematic top view of the superfine pulverizing apparatus of the present invention;

FIG. 5 is a schematic cross-sectional view taken along the A-A direction in FIG. 4;

FIG. 6 is an exploded schematic view of the classifier wheel and the discharge recoil air jacket;

FIG. 7 is a schematic perspective view of a classification wheel;

Fig. 8 is a schematic side view of the classification wheel.

Wherein: 1. a housing; 101. an air inlet; 2. a pulverizer; 3. a classifier; 4. a crushing mechanism; 41. a cutterhead; 42. a crushing knife; 43. a gear ring; 5. a first driving member; 6. a material baffle; 61. a baffle body; 62. an air deflector; 7. a feeding mechanism; 71. a hopper; 72. a feed channel; 73. a screw conveyor; 8. a classification wheel; 81. an impeller disc; 82. a blade; 9. discharging recoil gas sleeve; 91. an inner tube; 92. an outer tube; 93. a closed loop; 94. a cavity; 95. an air inlet; 10. a second driving member; 11. a bracket; 12. a vertical shaft; 13. an air filter.

Detailed Description

The technical scheme of the invention is further described below with reference to the accompanying drawings and specific embodiments:

An ultrafine grinding device as shown in figures 1 to 5 comprises a bracket 11, a shell 1 arranged on the bracket 11, a grinder 2 arranged in the lower cavity of the shell 1 and a classifier 3 arranged in the upper cavity of the shell 1. The shell 1 is provided with a feed inlet and an air inlet 101.

The pulverizer 2 comprises a vertical shaft 12 rotatably arranged in a vertical direction and extending out of the housing 1, a plurality of pulverizing mechanisms 4 connected to the vertical shaft 12, and a first driving member 5 for driving the vertical shaft 12 to rotate. The crushing mechanisms 4 are arranged up and down along the vertical shaft 12, the first driving piece 5 is arranged on the bracket 11, and the first driving piece 5 is connected with the vertical shaft 12 through a belt for transmission.

The pulverizing mechanism 4 includes a cutter head 41 provided on the vertical shaft 12, a plurality of pulverizing blades 42 provided on the cutter head 41, and a ring gear 43 fitted around the outer periphery of the cutter head 41. The ring gear 43 is fixed to the housing 1, and a crushing gap is formed between the crushing blade 42 and the ring gear 43.

The outer diameter of the ring gear 43 of the pulverizing mechanism 4 located below is larger than the outer diameter of the ring gear 43 of the pulverizing mechanism 4 located above. Preferably, the inner diameter of the gear ring 43 of the lower pulverizing mechanism 4 is larger than the outer diameter of the gear ring 43 of the upper pulverizing mechanism 4, so that the pulverized material particles can flow upward. The crushing gap of the lower crushing mechanism 4 is larger than that of the upper crushing mechanism 4, so that the material particles with larger mass or larger volume thrown out by the classifier 3 can enter the upper crushing mechanism 4 for crushing. Preferably, the pulverizing mechanism 4 is provided directly below the classifier 3, and the present ultrafine pulverizing apparatus has two pulverizing mechanisms 4.

The air inlet 101 is arranged below the crushing mechanism 4, and a material baffle 6 is arranged between the crushing mechanism 4 and the air inlet 101. The material baffle 6 comprises a baffle body 61 provided with a plurality of ventilation openings and an air deflector 62 arranged at the ventilation openings. One end of the air deflector 62 is connected with the baffle body 61, and the other end extends obliquely upwards to guide wind, and meanwhile, material particles can be prevented from entering the ventilation opening.

A muffler and an air filter are arranged at the air inlet 101. The noise generated when the pulverizer 2 pulverizes the materials is reduced, and meanwhile, air entering the inner cavity of the shell 1 can be filtered, so that the cleanliness of the material particles is ensured.

The superfine grinding device also comprises a feeding mechanism 7 communicated with the feeding hole. The feeding mechanism 7 includes a hopper 71, a feeding path 72 that communicates the hopper 71 with the housing 1, and a screw conveyor 73 provided in the feeding path 72. The feed inlet is arranged at the position of the lowest crushing mechanism 4, and after materials enter the inner cavity of the shell 1, the materials enter the lowest crushing mechanism 4 for crushing.

As shown in fig. 6 to 8, the classifier 3 includes a classifier wheel 8, a second driving member 10 for driving the classifier wheel 8 to rotate, and a discharge recoil air jacket 9 provided on the housing 1. One end of the discharging recoil air sleeve 9 is positioned in the shell 1 and is opposite to the classifying wheel 8, and the other end is positioned outside the shell 1.

The classifying wheel 8 comprises two impeller plates 81 and a plurality of blades 82 which are fixed between the two impeller plates 81 and enclose a circle, a feeding gap is arranged between two adjacent blades 82, and an inner cavity is formed at the inner side of one circle of blades 82. One impeller plate 81 is connected with the second driving piece 10, and the other impeller plate 81 is provided with a through hole communicated with the inner cavity, and the through hole is communicated with the discharging recoil air sleeve 9. The material particles can enter the inner cavity from the gap between two adjacent blades 82 for classification, and the particles with larger particle size or heavier mass are thrown out of the classification wheel 8 under the action of centrifugal force and are not influenced by the centrifugal force any more and naturally fall into the crushing mechanism 4 for continuous crushing. The material particles with smaller particle size or lighter weight are subjected to smaller centrifugal force and cannot be thrown out of the classifier wheel 8, and can enter the middle channel of the discharging recoil air sleeve 9 from the inner cavity to flow out of the classifier 3, so that the purpose of classification is achieved.

The cross section of each blade 82 is 5 to 15 degrees from the radial direction of the impeller plate 81. Preferably, each blade 82 has a cross-section at 10 ° to the radial direction of the impeller disc 81. When the second driving member 10 drives the classifying wheel 8 to rotate, the rotating direction of the classifying wheel 8 is the same as the deflecting direction of the blades 82. When the classifying wheel 8 rotates, vortex generated by the blades 82 can be effectively reduced, wind resistance is reduced, material particles are conveniently thrown out of the classifying wheel 8, and the classifying precision of the classifier 3 is further improved.

One end of the discharging recoil air sleeve 9 is positioned in the shell 1, the other end of the discharging recoil air sleeve is positioned outside the shell 1, and one end positioned in the shell 1 is arranged opposite to the grading wheel 8. Because the classifying wheel 8 of the classifier 3 is a rotating part, the discharge recoil air sleeve 9 is a stationary part, and a gap exists between the rotating part and the stationary part, the existence of the gap easily causes materials to enter the gap and form accumulation, so that the classifying wheel 8 is difficult to rotate and even the second driving part 10 is burnt. Therefore, the discharging recoil air sleeve 9 comprises an inner pipe 91, an outer pipe 92 sleeved outside the inner pipe 91, and annular sealing rings 93 arranged at two ends of the inner pipe 91 and the outer pipe 92. A closed cavity 94 is formed among the inner tube 91, the outer tube 92 and the two closed rings 93, and the inner cavity of the inner tube 91 is a discharge channel. The discharging channel is communicated with the induced draft fan.

An air inlet 95 communicated with the cavity 94 is formed in the outer tube 92, the air inlet 95 is located outside the shell 1, and a plurality of through holes communicated with the cavity 94 are formed in a closed ring 93 close to one end of the classification wheel 8. The gas entering through the gas inlet 95 can flow out through the through hole, and the gap between the classifying wheel 8 and the discharging recoil gas sleeve 9 is cleaned, so that material particles are prevented from accumulating in the gap.

In this embodiment, the second driving member 10 is a high-speed motor, and the rotation speed thereof can reach 3000r/min to 12000r/min. The centrifugal force during particle classification can be adjusted by adjusting the rotating speed of the classification wheel 8 so as to screen out materials with specified granularity, and the size of the material particles entering the classification wheel 8 can be controlled. The motor is arranged outside the shell 1, a rotating shaft of the motor stretches into the shell 1 and is connected with the classifying wheel 8, and a sealing piece is arranged between the rotating shaft of the motor and the shell 1.

For easy assembly and disassembly, the shell 1 comprises an upper shell and a lower shell, the pulverizer 2 is arranged in the lower shell, and the classifier 3 is arranged in the upper shell. The upper shell and the lower shell are connected through a hinge.

When the superfine grinding device works, a discharging channel of the discharging recoil air sleeve 9 is communicated with a draught fan, and the draught fan forms negative pressure inside the shell 1. The first driving piece 5 is started to drive the crushing mechanism 4 to rotate, and the second driving piece 10 is started to drive the classifying wheel 8 to rotate. The materials are sent into the shell 1 through the feeding mechanism 7, the materials are crushed by the bottommost crushing mechanism 4 to form material particles, the material particles are driven by air flow to enter the classification wheel 8 from the gaps of the blades 32 of the classifier 3, and under the high-speed rotation of the classification wheel 8, some material particles with lighter mass or smaller volume are sucked away by the negative pressure of the induced draft fan, so that the crushing is completed. Some material particles with heavier mass or larger volume are thrown out of the classifying wheel 8, fall into the uppermost crushing mechanism 4 under the action of inertia, are further crushed, and enter the classifying wheel 8 for screening.

The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.

Claims

1. An ultra-fine pulverizing apparatus, comprising:

the shell is provided with a feed inlet and an air inlet;

The pulverizer is arranged in the lower cavity of the shell and comprises a vertical shaft, a plurality of pulverizing mechanisms, a first driving piece and a second driving piece, wherein the vertical shaft is arranged in a rotating mode along the vertical direction and extends into the shell, the pulverizing mechanisms are connected with the vertical shaft and drive the vertical shaft to rotate, the pulverizing mechanisms are arranged up and down along the vertical shaft, and the pulverizing mechanisms are arranged above the air inlet;

The classifier is arranged in the upper cavity of the shell and comprises a classifier wheel, a second driving piece for driving the classifier wheel to rotate and a discharging recoil air sleeve, and the classifier wheel comprises two impeller plates and a plurality of blades which are fixed between the two impeller plates and encircle the impeller plates;

the method is characterized in that:

A material baffle is arranged between the crushing mechanism and the air inlet, the material baffle comprises a baffle body provided with a plurality of ventilation openings and an air deflector arranged at the ventilation openings, one end of the air deflector is connected with the baffle body, and the other end of the air deflector extends obliquely upwards;

The crushing mechanism comprises a cutter disc arranged on the vertical shaft, a plurality of crushing cutters arranged on the cutter disc, and a gear ring sleeved on the periphery of the cutter disc, wherein the outer diameter of the gear ring of the lower crushing mechanism is larger than that of the gear ring of the upper crushing mechanism, a crushing gap is formed between the crushing cutters and the gear ring, and the crushing gap of the lower crushing mechanism is larger than that of the crushing mechanism positioned above;

The section of each blade is 5-15 degrees away from the radial direction of the impeller disc, and when the second driving piece drives the classifying wheel to rotate, the rotating direction of the classifying wheel is the same as the deflection direction of the blade;

When the superfine grinding device works, a discharging channel of the discharging backflushing air sleeve is communicated with a draught fan, the draught fan is used for forming negative pressure inside the shell, the first driving piece is started to drive the grinding mechanism to rotate, the second driving piece is started to drive the classifying wheel to rotate, materials are sent into the shell through the feeding mechanism and are ground by the lowest grinding mechanism to form material particles, the material particles enter the classifying wheel from blade gaps of the classifying machine under the driving of air flow, under the high-speed rotation of the classifying wheel, some material particles with lighter mass or smaller volume are sucked away by the negative pressure of the draught fan to finish grinding, some material particles with heavier mass or larger volume are thrown out of the classifying wheel, then fall into the uppermost grinding mechanism under the action of inertia to be further ground, and the ground material particles enter the classifying wheel to be screened.

2. The ultra-fine pulverizing apparatus according to claim 1, wherein: and a muffler and an air filter are arranged at the air inlet.

3. The ultra-fine pulverizing apparatus according to claim 1, wherein: the superfine grinding device further comprises a feeding mechanism communicated with the feeding port, wherein the feeding mechanism comprises a hopper, a feeding channel communicated with the hopper and the shell, and a screw conveyer arranged in the feeding channel.

4. The ultra-fine pulverizing apparatus according to claim 1, wherein: one end of the discharging recoil air sleeve is positioned in the shell and is opposite to the classifying wheel, and the other end of the discharging recoil air sleeve is positioned outside the shell.

5. The ultra-fine pulverizing apparatus according to claim 4, wherein: a feeding gap is formed between two adjacent blades, an inner cavity is formed at the inner side of one circle of blades, one impeller disc is connected with the second driving piece, a through hole communicated with the inner cavity is formed in the other impeller disc, and the through hole is communicated with the discharging recoil air sleeve.

6. The ultra-fine pulverizing apparatus according to claim 4, wherein: the discharging recoil air sleeve comprises an inner pipe, an outer pipe sleeved outside the inner pipe and annular closed rings arranged at two ends of the inner pipe and the outer pipe, a closed cavity is formed among the inner pipe, the outer pipe and the two closed rings, the inner cavity of the inner pipe is the discharging channel, an air inlet communicated with the cavity is formed in the outer pipe, the air inlet is located outside the shell, and a plurality of through holes communicated with the cavity are formed in the closed rings close to one end of the classifying wheel.

7. The ultra-fine pulverizing apparatus according to claim 1, wherein: the superfine grinding device further comprises a support, a plurality of rollers are arranged at the lower end of the support, and the shell and the first driving piece are arranged on the support.