CN1698965A - Vertical roller grinding machine for super-fine powder - Google Patents

Vertical roller grinding machine for super-fine powder Download PDF

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Publication number
CN1698965A
CN1698965A CN 200510017387 CN200510017387A CN1698965A CN 1698965 A CN1698965 A CN 1698965A CN 200510017387 CN200510017387 CN 200510017387 CN 200510017387 A CN200510017387 A CN 200510017387A CN 1698965 A CN1698965 A CN 1698965A
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China
Prior art keywords
bistrique
grinding
roller
big mill
shaft
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Granted
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CN 200510017387
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Chinese (zh)
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CN100493719C (en
Inventor
陆福才
徐长白
吴贵军
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Publication of CN1698965A publication Critical patent/CN1698965A/en
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Abstract

This invention relates to a multi-power ultrafine grinding vertical lapping machine, which comprises housing, a grinding board, a power transmitting means, an air intake duct system connecting the grinding board and charging pipe, wherein a motor and a decelerator in the lower of the grinding board constitute an actuating system, and in the grinding board is arranged a corresponding bistrique supported in the locomotive; the grinding roll of the bistrique presses to ginding board edge, and in the bistrique is arranged the grinding head motor used for driving the roll rotating; in the housing is arranged the crosswind gas flow duct channel for driving air flow upwards in housing.

Description

Vertical roller grinding machine for super-fine powder
Technical field
The present invention relates to a kind of mill and the grinding roller vertical roller grinding machine for super-fine powder of many power grindings of self-movement separately.
Background technology
Known vertical roll grinder, its structure is that big mill rotates around central shaft mostly, central shaft drives through lower motor, reductor, the bistrique grinding roller is driven by big mill and rotates around own axis, the bistrique grinding roller is passive not drive, this vertical roll grinder is in when work, and grinding roller and mill mainly are that material is milled to powder is main by pushing to the effect of material.Existing vertical roll grinder, bistrique is installed in the swing arm of fixed point swing, owing to install and foozle, each bistrique all has different with big mill relative position and gap, be in course of adjustment, because bistrique swing camber line, bistrique, grinding roller and big mill often have angle, meshing point bed of material angle is changed to some extent, stressed variation and influence the stability of grinding flour quality and work.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art and provide a kind of and can improve the vertical roller grinding machine for super-fine powder that grinds milling quality and increase powder process stability.
The object of the present invention is achieved like this: comprise body, be arranged on the big mill in the body, drive the actuating unit that big mill rotates, the gas handling system that is communicated with big mill and be arranged on the charge pipe of the adding material at body middle part, the transmission system that big mill is made up of the motor and the decelerator of its underpart is through the central vertical main shaft drives, big mill is provided with the bistrique that matches with big mill, bistrique is supported on the travelling car, bistrique is under the elastic compression devices effect, the grinding roller of bistrique is pressed on the big mill limit, the grinding head motor that the grinding roller that is used to drive bistrique rotates is installed on bistrique, in body, be provided with lateral airflow guiding air channel, upwards flow for entering the rotation of body gas.
Big mill connects with the transmission system of being made up of decelerator, main motor of its underpart mutually by central vertical main shaft, shaft joint, is provided with the column body in the bottom of big mill, and the central vertical main shaft is installed on the following awl seat of column body by block bearing.
Grinding roller is installed on the bistrique body by bistrique power transmission shaft, bearing, and the bistrique power transmission shaft connects with grinding head motor mutually by belt, belt pulley.
The bistrique body is connected with swing arm by locating shaft up and down, swing arm is connected with the vehicle frame of travelling car by swing arm movable axis, support wheel shaft, be furnished with four pair rollers in the vehicle frame bilateral symmetry, wherein two pair rollers are installed on the supporting shaft, one pair roller is installed in and supports on the wheel shaft, another pair roller is installed on the semiaxis wheel shaft, and travelling car slides rolling by roller on fixed saddle.
The pressure apparatus that the grinding roller of bistrique is pressed on the big mill limit is two groups of pressing spring that are arranged on the bistrique both sides, and an end of pressing spring is installed on the vehicle frame overhanging arm, and the other end is installed on the saddle support arm,
Be provided with annular airflow at big mill upper edge periphery and distribute the air channel, on annular airflow distribution air channel, be evenly equipped with some certain angle air channel blades that are directed to, sending air-flow here by air blast enters from the air port, air-flow rises and enters base, lower edge, air channel breach, under the effect of air channel blade and last back-up ring, air-flow becomes level and tangential flowing, and the powder that tangential horizontal gas flow and grinding roller and big mill grind is formed mixed airflow, and mixed airflow rises and enters grader.
Body is by upper machine body, lower body, installing down, the base plate and the seal of awl seat constitute closed body, upper machine body is provided with charge pipe, material adds from last charge pipe, connect grader on the body, underpart is the column body, column body top is big mill, the downside of fixed saddle and upper machine body, fixedly overhanging beam connects fastening, to guarantee the rigidity and the levelness of travelling car and bistrique motion in the work, the rotary body that rotates with the central vertical main shaft also is installed on the central vertical main shaft, the scraper plate that is arranged on the base plate is being installed on the rotary body, on base plate, is having the clout outlet.
The bistrique that matches with big mill that is bearing in the travelling car front end can be three, four, five, six, and each bistrique that is installed on the travelling car is the equal angles distribution on big mill.
Between pressing spring and vehicle frame overhanging arm, also be provided with the slow device that shakes, its center is an adjusting screw(rod), the front end of spring is fixed on the side saddle support arm of fixed saddle, the pretension of spring is to realize by the distance of regulating slow vibrator and screw rod, by adjusting nut and screw rod relative position, can adjust the size of grinding roller with the big mill horizontal clearance of definite bistrique, the control bistrique is to the pressure of big mill.
Grinding roller passes through grinding spindle, the grinding spindle bearing is installed on the bistrique body, gear wheel also is installed on the grinding spindle, on the bistrique body, also two of bistriques are installed by bearing, on two of bistriques, be equipped with and the gear wheel pinion in mesh, on two of bistriques, two shaft pulleys are installed, two shaft pulleys pass through belt, motor pulley connects mutually with grinding head motor, the bistrique body is by last locating shaft, following locating shaft is connected with swing arm, swing arm is by the swing arm movable axis, supporting wheel shaft is connected with the vehicle frame of travelling car, be furnished with four pair rollers in the vehicle frame bilateral symmetry, wherein two pair rollers are installed on the supporting shaft, one pair roller is installed in the support wheel shaft, another pair roller is installed on the semiaxis wheel shaft, and travelling car slides rolling by roller on fixed saddle.
Bistrique of the present invention is installed in and moves horizontally on the dolly, the parallel relation that bistrique grinding roller and big abrasive disk space remain unchanged, the bistrique grinding roller is change in adjusting or working, the grinding roller line keeping parallelism that is meshed with big mill, and do not produce angle, this is for improving and stable to grind milling quality and increase powder process stability be crucial, therefore have simple in structure and efficient high, grind the good and stable strong advantage of powder process of milling quality.
Description of drawings
Fig. 1 is a main pseudosection of the present invention.
Fig. 2 is a top view profile of the present invention.
Fig. 3 is a side elevational schematic view of the present invention.
1, body 11, upper machine body 12, last charge pipe
13, lower body 14, base plate 15, clout outlet
16, fixed saddle 17, saddle support arm 18, fixing overhanging beam
2, center stand column 21, upper bearing (metal) 22, central principal axis
23, lower bearing 24, big mill 25, following awl seat
26, rubbing board
3, main transmission
31, main motor 32, decelerator 33, shaft coupling
4, travelling car system 41, earrings 42, vehicle frame
43, roller 44, support wheel shaft 45, wheel shaft
46, swing arm 47, swing arm movable axis
48, locating shaft in locating shaft 49, bistrique and the swing arm under bistrique and the swing arm
410, loading spring 411, adjusting nut 412, screw rod 412
413, wheel shaft 414, semiaxis wheel shaft 415, overhanging arm
416, slow shake device 5, distribution of air flow air channel 51, air channel blade
52, enclose on air inlet 53, lower edge, air channel 54, the air channel
6, bistrique 61, grinding roller 62, bistrique body
63, grinding spindle 64, gear wheel 65, seal
66, grinding spindle bearing 67, pinion 68, bistrique are two
69, two shaft pulleys 610, motor pulley 611, grinding head motor
The specific embodiment
As shown in Figure 1, 2, 3, the charge pipe 12 that the present invention includes body 1, is arranged on the big mill 24 in the body 1, the actuating unit that drives big mill 24 rotations, the gas handling system that is communicated with big mill 24 and is arranged on the adding material at body middle part.
The transmission system 3 that big mill 24 is made up of the motor 31 and the decelerator 32 of its underpart drives through central vertical main shaft 22, big mill 24 is provided with the bistrique 6 that matches with big mill 24, bistrique 6 is supported on the travelling car 4, bistrique 6 is under the elastic compression devices effect, the grinding roller 61 of bistrique 6 is pressed on big mill 24 limits, the grinding head motor 611 that the grinding roller 61 that is used to drive bistrique 6 rotates is installed on bistrique 6, in body, be provided with lateral airflow guiding air channel, upwards flow for entering the rotation of body gas.
The big mill 24 that is arranged in the body 1 passes through central vertical main shaft 22, shaft joint 33 and its underpart by decelerator 32, the transmission system 3 that main motor 31 is formed connects mutually, main motor 31 drives big mill 24 and rotates, bottom at big mill 24 is provided with column body 2, central vertical main shaft 22 is installed on the following awl seat 25 of column body 2 by block bearing 21 and 23, following awl seat 25 is installed on the base plate 14, between base plate 14 and big mill 24 is lower body 13, the rotary body that rotates with the central vertical main shaft also is installed on central vertical main shaft 22, the scraper plate 26 that is arranged on the base plate 14 is being installed on the rotary body, on base plate 14, have clout outlet 15
Grinding roller 61 is installed on the bistrique body 62 by grinding spindle 63, grinding spindle bearing 66, gear wheel 64 also is installed on the grinding spindle 63, on bistrique body 62, also two 68 of bistriques are installed by bearing, on two 68 of bistriques, be equipped with and gear wheel 64 pinion in mesh 67, on two 68 of bistriques, two shaft pulleys 69 are installed, two shaft pulleys 69 connect with grinding head motor 611 mutually by belt, motor pulley 610, require to select different grinding head motor rotating speeds according to material variety and milling process; Bistrique body 62 is connected with swing arm 46 by last locating shaft 49, following locating shaft 48, swing arm 46 is connected with the vehicle frame 42 of travelling car 4 by swing arm movable axis 47, support wheel shaft 44, be furnished with four pair rollers 43 in vehicle frame 42 bilateral symmetry, wherein two pair rollers are installed on supporting shaft 45 and 413, one pair roller is installed in and supports wheel shaft 44, another pair roller is installed on the semiaxis wheel shaft 414, and travelling car 4 slides rolling by roller 43 on fixed saddle 16
Make the grinding roller 61 of bistrique 6 press to pressure apparatus 410 on big mill 24 limits for being arranged on two groups of pressing spring 410 of bistrique 6 both sides, an end of pressing spring 410 is installed on the vehicle frame overhanging arm 415, and the other end is installed on the saddle support arm 17,
Be provided with annular airflow at big mill 24 upper edge peripheries and distribute air channel 5, on annular airflow distribution air channel, be evenly equipped with some certain angle air channel blades 51 that are directed to, sending air-flow here by air blast 52 enters from the air port, air-flow rises and enters base, 5 lower edge, air channel breach 53, under air channel blade 51 and 54 effects of last back-up ring, air-flow becomes level and tangential flowing, and the powder that tangential horizontal gas flow and grinding roller 6 and big mill 24 grind is formed mixed airflow, and mixed airflow rises and enters grader.
Body 1 constitutes closed body by upper machine body 11, lower body 13, base plate 14 and seal 65, upper machine body 11 is provided with charge pipe 12, material adds from last charge pipe 12, connect grader on the body, body 1 bottom is a column body 2, column body 2 tops are big mill 24, the downside of fixed saddle 16 and upper machine body 11, fixedly overhanging beam 18 connect fastening, to guarantee the rigidity and the levelness of travelling car and bistrique motion in the work.
The bistrique that matches with big mill 24 can be three, four, five, six, and each bistrique that is installed on the travelling car is the equal angles distribution on big mill.
Also be provided with the slow device 416 that shakes between pressing spring 410 and vehicle frame overhanging arm 415, its center is an adjusting screw(rod) 412, and in the realization machine works, the slow of bistrique and fuselage shakes and commentaries on classics of bistrique mill and the accurate adjustment in gap between the mill greatly.The front end of spring 410 is fixed on the side saddle support arm 17 of fixed saddle 16, the pretension of spring is to realize by the distance of regulating slow vibrator 416 and screw rod 412, by adjusting nut 411 and screw rod 412 relative positions, can adjust the size of grinding roller 61 with big mill 24 horizontal clearances of definite bistrique 6, the control bistrique is to the pressure of big mill.
Settle an annular steam flow to distribute the air channel at big mill upper edge periphery, uniform some certain angle impeller that is directed to are encircled in the air channel, revolve on evenly to guarantee to enter air-flow.
Characteristics of the present invention be at process of lapping except that producing squeezing action, also produce strong shear action, be the abrasive dust mechanism that realizes that this is new, swing arm 46 rear sides at travelling car 4 are installed grinding head motor 611, grinding head motor 611 drives two 68 and pair of engaged gears 67 and 64 in the grinding head body 62 by belt pulley 610 and two shaft pulleys 69, thereby drives grinding spindle 63 and grinding roller 61 rotations.
Big mill 24 upper peripheries are installed has a ring-type great circle to claim moving air flow to distribute air channel 5, the border, air channel is distribution 20 blades 51 evenly, each blade is with radially angle is all the same, sending air-flow here by air blast 52 tangentially enters from the air port, air-flow rises and enters base, 5 lower edge, air channel breach 53, and under guide vane 51 and 54 effects of last back-up ring, air-flow becomes level and tangential flowing, the powder that tangential horizontal gas flow and grinding roller 6 and big mill 24 grind is formed mixed airflow, and mixed airflow rises and enters grader.
Operating process of the present invention is as follows:
As Fig. 1,2, shown in 3, during operation, material from hopper through screw feeder, a certain size size material piece is evenly added from central nozzle, material falls into big mill 24 middle parts, under centrifugal action, evenly throw to big mill 24 around, then the grinding roller 61 that is rotated, material is engaged between the big mill 24, big mill 24 pushes and shears material with grinding roller 61 actings in conjunction, before bulk or the attempt of the thicker bed of material enlarge the gap of big mill 24 and grinding roller 61, the result is loaded that spring imposes bigger pressure and acceleration makes the material refinement, the powder that generates surmise by difference and form, be so-called fine powder and meal and bigger in small, broken bits, send air-flow here through the air port 52 by air blast, on lower body 13 bottoms, rise, again through big mill 24 bottoms, through the lower edge in distribution of air flow air channel 5 breach 53, air-flow circle 54 common guiding air-flows on air channel blade 51 and air channel become horizontal rotatio direction, the powder that horizontally rotates air-flow and big mill is mixed into mixed airflow, the mixed airflow upwelling exports to grader to upper machine body 11, the thinner qualified fine powder of the effect of classified machine flows to collection conduit by grader, classified machine 60 effects, thin qualified fine powder flows to collection conduit by grader, be returned big mill 24 than coarse dispersion, and repeat above-mentioned process of lapping, above-mentioned is that air-flow can not mix than the thin piece of coarse crushing, only cross big mill 24 and drop to lower body 13 and center stand column composition space, be rotated big mill 24 at last and draw together clout outlet 15 whereabouts, and discharge outside the body from the clout outlet from base plate 14.

Claims (10)

1, a kind of vertical roller grinding machine for super-fine powder, the charge pipe that comprises body, is arranged on the big mill in the body, the actuating unit that drives big mill rotation, the gas handling system that is communicated with big mill and is arranged on the adding material at body middle part is characterized in that:
The transmission system that a, big mill are made up of the motor and the decelerator of its underpart is through the central vertical main shaft drives,
B, big mill are provided with the bistrique that matches with big mill, and bistrique is supported on the travelling car, and bistrique presses on the big mill limit grinding roller of bistrique under the elastic compression devices effect,
C, the grinding head motor that the grinding roller that is used to drive bistrique rotates is installed on bistrique,
D, in body, be provided with lateral airflow guiding air channel, upwards flow for entering the rotation of body gas.
2, a kind of vertical roller grinding machine for super-fine powder according to claim 1, it is characterized in that: big mill connects with the transmission system of being made up of decelerator, main motor of its underpart mutually by central vertical main shaft, shaft joint, bottom at big mill is provided with the column body, and the central vertical main shaft is installed on the following awl seat of column body by block bearing.
3, a kind of vertical roller grinding machine for super-fine powder according to claim 1 and 2 is characterized in that: grinding roller is installed on the bistrique body by bistrique power transmission shaft, bearing, and the bistrique power transmission shaft connects with grinding head motor mutually by belt, belt pulley.
4, a kind of vertical roller grinding machine for super-fine powder according to claim 3, it is characterized in that: the bistrique body is connected with swing arm by locating shaft up and down, swing arm is connected with the vehicle frame of travelling car by swing arm movable axis, support wheel shaft, be furnished with four pair rollers in the vehicle frame bilateral symmetry, wherein two pair rollers are installed on the supporting shaft, one pair roller is installed in and supports on the wheel shaft, and another pair roller is installed on the semiaxis wheel shaft, and travelling car slides rolling by roller on fixed saddle.
5, a kind of vertical roller grinding machine for super-fine powder according to claim 4, it is characterized in that: the pressure apparatus that the grinding roller of bistrique is pressed on the big mill limit is two groups of pressing spring that are arranged on the bistrique both sides, one end of pressing spring is installed on the vehicle frame overhanging arm, and the other end is installed on the saddle support arm.
6, a kind of vertical roller grinding machine for super-fine powder according to claim 5, it is characterized in that: be provided with annular airflow at big mill upper edge periphery and distribute the air channel, on annular airflow distribution air channel, be evenly equipped with some certain angle air channel blades that are directed to, sending air-flow here by air blast enters from the air port, air-flow rises and enters base, lower edge, air channel breach, under the effect of air channel blade and last back-up ring, air-flow becomes level and tangential flowing, the powder that tangential horizontal gas flow and grinding roller and big mill grind is formed mixed airflow, and mixed airflow rises and enters grader.
7, a kind of vertical roller grinding machine for super-fine powder according to claim 6, it is characterized in that: body is by upper machine body, lower body, installing down, the base plate and the seal of awl seat constitute closed body, upper machine body is provided with charge pipe, material adds from last charge pipe, connect grader on the body, underpart is the column body, column body top is big mill, the downside of fixed saddle and upper machine body, fixedly overhanging beam connects fastening, to guarantee the rigidity and the levelness of travelling car and bistrique motion in the work, the rotary body that rotates with the central vertical main shaft also is installed on the central vertical main shaft, the scraper plate that is arranged on the base plate is being installed on the rotary body, on base plate, is having the clout outlet.
8, a kind of vertical roller grinding machine for super-fine powder according to claim 7, it is characterized in that: the bistrique that matches with big mill that is bearing in the travelling car front end can be three, four, five, six, and each bistrique that is installed on the travelling car is the equal angles distribution on big mill.
9, a kind of vertical roller grinding machine for super-fine powder according to claim 8, it is characterized in that: between pressing spring and vehicle frame overhanging arm, also be provided with the slow device that shakes, its center is an adjusting screw(rod), the front end of spring is fixed on the side saddle support arm of fixed saddle, the pretension of spring is to realize by the distance of regulating slow vibrator and screw rod, by adjusting nut and screw rod relative position, can adjust the size of grinding roller with the big mill horizontal clearance of definite bistrique, the control bistrique is to the pressure of big mill.
10, a kind of vertical roller grinding machine for super-fine powder according to claim 3, it is characterized in that: grinding roller passes through grinding spindle, the grinding spindle bearing is installed on the bistrique body, gear wheel also is installed on the grinding spindle, on the bistrique body, also two of bistriques are installed by bearing, on two of bistriques, be equipped with and the gear wheel pinion in mesh, on two of bistriques, two shaft pulleys are installed, two shaft pulleys pass through belt, motor pulley connects mutually with grinding head motor, the bistrique body is by last locating shaft, following locating shaft is connected with swing arm, swing arm is by the swing arm movable axis, supporting wheel shaft is connected with the vehicle frame of travelling car, be furnished with four pair rollers in the vehicle frame bilateral symmetry, wherein two pair rollers are installed on the supporting shaft, one pair roller is installed in the support wheel shaft, another pair roller is installed on the semiaxis wheel shaft, and travelling car slides rolling by roller on fixed saddle.
CNB2005100173872A 2005-03-01 2005-03-01 Vertical roller grinding machine for super-fine powder Expired - Fee Related CN100493719C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2005100173872A CN100493719C (en) 2005-03-01 2005-03-01 Vertical roller grinding machine for super-fine powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2005100173872A CN100493719C (en) 2005-03-01 2005-03-01 Vertical roller grinding machine for super-fine powder

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Publication Number Publication Date
CN1698965A true CN1698965A (en) 2005-11-23
CN100493719C CN100493719C (en) 2009-06-03

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102407180A (en) * 2011-11-24 2012-04-11 武汉科技大学 Double-screw double-pyramid spring-weighted buffering device for vertical roller grinder
CN102421527A (en) * 2009-04-01 2012-04-18 Fl史密斯公司 Method for controlling the material feed to a roller mill and such similar mills
CN102463174A (en) * 2010-11-17 2012-05-23 王燕 Vertical teeth-roller grinder
CN102652039A (en) * 2010-03-18 2012-08-29 蒂森克虏伯伯利休斯股份有限公司 Roller mill and method for driving roller mill
CN103801430A (en) * 2014-02-17 2014-05-21 江苏天鹏机电制造有限公司 Hydraulically-loaded dual-power pulverizer
CN105435912A (en) * 2015-12-29 2016-03-30 盐城工学院 Roller mill with main drive grinding roller driving grinding disc in friction manner and grinding method of roller mill
CN108435339A (en) * 2018-04-23 2018-08-24 珠海市万顺睿通科技有限公司 A kind of powder manufacturing apparatus with safety guard
CN109746085A (en) * 2017-11-06 2019-05-14 三菱日立电力系统株式会社 The application method of pulverizer and pulverizer
CN114012574A (en) * 2022-01-05 2022-02-08 四川神光石英科技有限公司 Vertical grinding machine
CN114634753A (en) * 2022-03-02 2022-06-17 王仁武 Preparation method of composite fireproof coating

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102421527A (en) * 2009-04-01 2012-04-18 Fl史密斯公司 Method for controlling the material feed to a roller mill and such similar mills
CN102421527B (en) * 2009-04-01 2014-01-08 Fl史密斯公司 Method for controlling the material feed to a roller mill and such similar mills
CN102652039B (en) * 2010-03-18 2014-07-23 蒂森克虏伯伯利休斯股份有限公司 Roller mill and method for driving roller mill
CN102652039A (en) * 2010-03-18 2012-08-29 蒂森克虏伯伯利休斯股份有限公司 Roller mill and method for driving roller mill
CN102463174A (en) * 2010-11-17 2012-05-23 王燕 Vertical teeth-roller grinder
CN102407180B (en) * 2011-11-24 2013-09-11 武汉科技大学 Double-screw double-pyramid spring-weighted buffering device for vertical roller grinder
CN102407180A (en) * 2011-11-24 2012-04-11 武汉科技大学 Double-screw double-pyramid spring-weighted buffering device for vertical roller grinder
CN103801430A (en) * 2014-02-17 2014-05-21 江苏天鹏机电制造有限公司 Hydraulically-loaded dual-power pulverizer
CN103801430B (en) * 2014-02-17 2015-03-25 江苏天鹏机电制造有限公司 Hydraulically-loaded dual-power pulverizer
CN105435912A (en) * 2015-12-29 2016-03-30 盐城工学院 Roller mill with main drive grinding roller driving grinding disc in friction manner and grinding method of roller mill
CN109746085A (en) * 2017-11-06 2019-05-14 三菱日立电力系统株式会社 The application method of pulverizer and pulverizer
CN108435339A (en) * 2018-04-23 2018-08-24 珠海市万顺睿通科技有限公司 A kind of powder manufacturing apparatus with safety guard
CN114012574A (en) * 2022-01-05 2022-02-08 四川神光石英科技有限公司 Vertical grinding machine
CN114634753A (en) * 2022-03-02 2022-06-17 王仁武 Preparation method of composite fireproof coating

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Application publication date: 20051123

Assignee: Henan Liwei pipe equipment Co., Ltd.

Assignor: Lu Fucai|Xu Changbai|Wu Guijun

Contract record no.: 2012410000092

Denomination of invention: Vertical roller grinding machine for super-fine powder

Granted publication date: 20090603

License type: Exclusive License

Record date: 20121214

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Granted publication date: 20090603

Termination date: 20200301