CN201728133U - Multi-stage crusher - Google Patents

Multi-stage crusher Download PDF

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Publication number
CN201728133U
CN201728133U CN2010202113393U CN201020211339U CN201728133U CN 201728133 U CN201728133 U CN 201728133U CN 2010202113393 U CN2010202113393 U CN 2010202113393U CN 201020211339 U CN201020211339 U CN 201020211339U CN 201728133 U CN201728133 U CN 201728133U
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CN
China
Prior art keywords
crushing chamber
housing
blade row
blade
crushing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2010202113393U
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Chinese (zh)
Inventor
李炳华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANDE HULIAN BUILDING MATERIALS CO Ltd
Original Assignee
JIANDE HULIAN BUILDING MATERIALS CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JIANDE HULIAN BUILDING MATERIALS CO Ltd filed Critical JIANDE HULIAN BUILDING MATERIALS CO Ltd
Priority to CN2010202113393U priority Critical patent/CN201728133U/en
Application granted granted Critical
Publication of CN201728133U publication Critical patent/CN201728133U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a multi-stage crusher which comprises a driving device, a drive mechanism, a stand, a housing, a feeding mechanism connected with a feed inlet of the housing, a crushing cutter array disposed in the housing, and a vacuum suction discharging mechanism connected with a feed outlet of the housing. The housing is provided therein with a first crushing chamber, a second crushing chamber, and a third crushing chamber in turn starting from the feed inlet on a front end; the crushing cutter array includes several material crushing hammers in the first crushing chamber, a plate-like medium-sized cutter array in the second crushing chamber, and a plate-like small-sized cutter array in the third crushing chamber; the material crushing hammers, the medium-sized cutter array, and the small-sized cutter array are detachably connected with a cutter array spindle; and the driving device drives the cutter array spindle through the drive mechanism. The crushing chambers and the cutter arrays are disposed at different stages, characterized by high crushing efficiency and obviously improved product fineness; furthermore, through adjusting feeding speed and air flow in the housing, the product fineness can be adjusted conveniently to meet crushing requirements of different materials.

Description

Multistage grinder
Technical field
The utility model relates to a kind of size reduction machinery, especially relates to a kind of multistage grinder that solid particles such as lime can be carried out meticulous pulverizing.
Background technology
The existing common structure of pulverizer that is used to pulverize solid particles such as lime comprises a frame, on frame, be fixed with housing, the blade row of pulverizing usefulness is set in the housing, blade row is by motor-driven, the blade row of high speed rotating clashes into crushed material, and the crushed material that is clashed into strikes on the sidewall of housing again, and the crushed material after the bounce-back is clashed into by blade row once more, so circulate repeatedly, crushed material is ground into tiny particle the most at last.Because blade row shape and structure are single, make it be difficult to adapt to the different crushed material of granular size, usually, be to guarantee the intensity and the service life of blade row, the structural design of blade row mainly is that crushed material with larger particles is a prerequisite, like this, will influence the grain fineness of final crushed material, though pulverize the fineness that can appropriateness improves crushed material by prolonging pulverizing time or secondary, can have a strong impact on the efficient of pulverizer, increase production cost.
Disclosed on Chinese patent literature " a kind of final grinder ", its Granted publication number is CN2822769Y, this pulverizer by the cylindrical shape pulverizing chamber that has tangential air inlet/outlet, be installed in pulverizing chamber inner wall belt triangle rib reflecting plate, be installed in rotor rotating disk on the arbor and the parts such as a plurality of hammer leaves of uniform rotating disk circumferential edges constitute; Its feeding manner is for the granule air-flow carries tangential admission, and the kinetic energy and the hammer leaf that utilize air-flow to give material particles hit the kinetic energy that transmits, and have improved grindability and crush efficiency.But it is applicable to the pulverizing of granule crushed material, can't adapt to the different crushed material of granular size equally.
The utility model content
The utility model is the defective that fineness is not high and crush efficiency is low that can't adapt to the different crushed material of granular size, final crushed material for the pulverizer that overcomes prior art is existing, the high high efficiency pulverizer of grain fineness after providing a kind of and adapt to variable grain size crushed material, pulverizing.
To achieve these goals, the utility model is by the following technical solutions: a kind of multistage grinder, comprise drive unit, transmission mechanism, frame, be fixedly connected on the housing of splitting on the frame, the feeding mechanism that links to each other with the housing charging aperture, be located at the vacuum suction discharging mechanism that the pulverizing in the housing is used blade row and linked to each other with the housing discharging opening, described housing is a horizontal type structure, and be spliced to form by left shell and right shell body, charging aperture from front end in the housing is provided with first crushing chamber successively, second crushing chamber and the 3rd crushing chamber, described pulverizing comprises the some particle hammers that are positioned at first crushing chamber with blade row, be arranged in the flat blade row and the flat little blade row that is positioned at the 3rd crushing chamber of second crushing chamber, described particle hammer, middle blade row and little blade row and blade row main shaft removably connect, and drive unit drives the blade row main shaft by transmission mechanism.Be provided with three crushing chambers in the housing of the present utility model, and be equipped with corresponding blade row structure, particle hammer in its first crushing chamber is applicable to that the crushed material to larger particles carries out initial pulverizing, not only can guarantee the mechanical strength and the service life of particle hammer, also help improving crush efficiency the bulky grain crushed material.Flat middle blade row in second crushing chamber and the flat little blade row in the 3rd crushing chamber then can carry out the degree of depth to the crushed material from first crushing chamber and pulverize, thereby can improve the fineness of final crushed material significantly, and shorten the corresponding pulverizing time, enhance productivity.In addition, housing of the present utility model is a horizontal type structure, and three crushing chambers are that level is arranged in order, and therefore helps controlling the time of staying of crushed material in each crushing chamber, to improve the uniform particles degree of final crushed material.Blade row and blade row main shaft adopt and removably connect, and help the maintenance and the replacing of blade row.
As preferably, it is horizontal cylindrical that described first crushing chamber is, and second crushing chamber and the 3rd crushing chamber all are the truncated cone of lateral arrangement, and the big end of its internal diameter is near charging aperture one side of housing, and the tapering of the frustum of a cone is 70 ° ~ 90 °.What discharging mechanism of the present utility model adopted is the vacuum suction, therefore, the transmission of three interior crushed materials of crushing chamber is to rely on the air-flow that sucks from the charging aperture of housing front end to promote, because the crushed material particle that has just entered in first crushing chamber is bigger, therefore can not taken away fast by air-flow, between the sidewall of itself and the particle hammer and first crushing chamber sufficient bump can be arranged, thereby make it be ground into more tiny particle, and columniform crushing chamber helps the producing balanced forces of particle hammer and crushing chamber, and can simplify the processing of housing.And the circular cone structure of second, third crushing chamber can make and strikes on the crushing chamber sidewall extreme direction bounce-back before housing of crushed material particle, thereby can avoid by the fast speed belt of air-flow from, clash into repeatedly thereby can guarantee to have fully, to improve crushed material effectively by the fineness after pulverizing.Further, because the internal diameter of second crushing chamber progressively dwindles, thereby, the effect that air-flow is had boundling, the small end that the flow velocity of air-flow joins at second crushing chamber and the 3rd crushing chamber has significantly and improves, thereby makes the crushed material particle have higher kinetic energy, in the time of in it enters into the 3rd crushing chamber, bigger with the impact of little blade row, and then help improving crushing effect.In addition, because of the sudden change in a cross section is arranged between second crushing chamber and the 3rd crushing chamber, so air-flow can produce a bigger turbulent flow, thereby help repeatedly fully clashing between crushed material particle and the little blade row, with the fineness of the final crushed material of further raising.
As preferably, described left shell and right shell body are provided with dismountable hard lining respectively on first crushing chamber, second crushing chamber and the 3rd crushing chamber place madial wall, both helped processing and manufacturing, convenient for maintaining and replacing simultaneously, in addition, the hard lining can adopt the material different with housing, and carries out corresponding heat treatment, thereby make it have higher mechanical strength, hardness and wearability, to increase the service life.
As preferably, the madial wall of being located at the hard lining in first crushing chamber is provided with sawtooth, thereby helps the quick pulverizing to the bulky grain crushed material, improves crush efficiency.
As preferably, described particle hammer is made up of a cylindricality hammer body and hammer stem, and the particle hammer is connected with the blade row main shaft by hammer stem, and it is 6 that described particle is hammered into shape, five equilibrium layout radially on the blade row main shaft.The hammer body quality of cylindricality is big, it has higher kinetic energy when high speed rotating, thereby both helped entering the pulverizing of the bigger crushed material particle of first crushing chamber, help again reducing the impact endurance test shock that the particle hammer produces with the crushed material particles hit time, can prolong its service life simultaneously.
As preferably, blade row comprises 6 flat middle blades in described, 6 flat small blades are drawn together in described pocket knife package, the plane of blade and small blade is parallel with the axis of blade row main shaft in described, and on the blade row main shaft radially five equilibrium arrange, outer end away from the blade row main shaft on described middle blade and the small blade is obliquely installed, and its incline direction is consistent with the madial wall of second crushing chamber and the 3rd crushing chamber respectively.Blade and small blade help the further pulverizing to fine particle in flat, middle blade and small blade outer end be obliquely installed the distance that then helps between balanced and the crushing chamber madial wall avoid the crushed material particle therefrom the gap location between blade, small blade and the crushing chamber madial wall flow away fast.
As preferably, described feeding mechanism comprises the charging pedestal that the charging aperture side of being located at housing is fixedlyed connected with frame, the upper end of charging pedestal is provided with hopper, be provided with the through hole that docks with the charging aperture of housing near on the sidewall of housing on the hopper, be provided with the feed shaft of level in the hopper, feed shaft and blade row main shaft are perpendicular, on the feed shaft radially five equilibrium 2 or 4 or 6 flight blades are set, the shape of flight blade and hopper inner chamber match, and feed shaft is by the charging motor-driven.Because the shape and the hopper inner chamber of the flight blade on the feed shaft match, and its quantity is even number, thereby when wherein the flight blade of pair of parallel is horizontal, hopper can be sealed, and along with the rotation of flight blade, progressively open in slit between itself and the hopper, the crushed material that falls within on the flight blade can slip into the hopper bottom, and the crushed material particle is sent in first crushing chamber by the through hole that docks with the charging aperture of housing, by control, can realize control to charging rate to the feed shaft rotating speed.
As preferably, described charging motor adopts stepper motor, thereby helps the accurate control to the feed shaft rotating speed, and then can be according to the speed of the different accurately control chargings of crushed material kind and smashing fineness.
As preferably, the sidewall of described hopper is provided with air inlet, and air inlet is provided with rotating air door.Because what discharging mechanism of the present utility model adopted is the vacuum suction, therefore, by rotating air door to regulate the size of air inlet, the speed of the flow of air-flow size and flow velocity in the adjustment housings easily, and then realization is to the adjustment of final crushed material fineness, make pulverizer can adapt to different types of crushed material, and produce the product of different smashing fineness.
As preferably, described discharging mechanism comprises a centrifugal fan, and the air inlet of centrifugal fan docks with the discharging opening of housing rear end.The blast height of centrifugal fan, air quantity is big, is suitable for the transmission of granular material.
Therefore, the utlity model has following beneficial effect: (1) crushing chamber and blade row classification are provided with, the crush efficiency height, and significantly improve the fineness of product; (2) simple and reasonable, operation and maintenance is convenient; (3) by adjustment to air-flow in charging rate and the housing, can adjust the fineness of product easily, make the pulverizing requirement of its suitable different materials.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation after the utility model is removed right shell body;
Fig. 3 is a front view of the present utility model;
Fig. 4 is the left view of Fig. 3.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further described.
As Fig. 1, among the embodiment shown in Figure 2, a kind of multistage grinder of the present utility model, comprise a frame 3 that is placed on ground, be respectively equipped with bearing block 31 in the rear and front end of frame, between former and later two bearing blocks, be provided with the housing of splitting 4, housing is the horizontal revolving body structure, its front end has charging aperture, housing is divided into left shell 41 and right shell body 42 along the vertical plane of crossing axial line, left shell and right shell body are respectively equipped with engaging lug on faying face, on the engaging lug with bolt with a left side, right shell body links into an integrated entity, also be provided with feeding mechanism 5 between the bearing block of housing and front end, this feeding mechanism comprises the charging pedestal 51 that is fixed on the frame, and it is the hopper 52 of rectangle that cross section is set in the upper end of charging pedestal, hopper one side is the inclined-plane, so that the landing of material.As shown in Figure 3, Figure 4, the feed shaft 53 of level is set in the hopper, the axis of rotation of feed shaft and housing is perpendicular, on the feed shaft radially five equilibrium the flight blade 54 of 4 rectangles is set, the outside of flight blade and hopper inner chamber match, feed shaft is connected with the rotating shaft of a charging motor 55, and the charging motor adopts stepper motor, so that its rotating speed is accurately controlled.On the hopper near be provided with on the sidewall of housing be positioned at feed shaft below and the through hole that dock with the charging aperture of housing, for improving the firm and sealing that connects, can connect by ring flange between the through hole of hopper and the charging aperture of housing.
As Fig. 2, shown in Figure 3, charging aperture from front end in the housing of the present utility model is provided with first crushing chamber 43, second crushing chamber 44 and the 3rd crushing chamber 45 successively, it is horizontal cylindrical that described first crushing chamber is, second crushing chamber and the 3rd crushing chamber all are the truncated cone of lateral arrangement, the big end of its internal diameter is near charging aperture one side of housing, and the tapering of the frustum of a cone is 80 °.Accordingly, be located at the flat pocket knife that the blade row that is used for comminuting matter in the housing comprises the particle hammer 61 that is positioned at first crushing chamber, is positioned at the flat blade row 62 of second crushing chamber and is positioned at the 3rd crushing chamber and arrange 63, particle hammer integral body is the iron hammer shape, form by the hammer body 611 of a cuboid and the flat hammer stem 612 of one, particle hammer quantity is 6, and radially five equilibrium is arranged on the blade row main shaft, and the hammer stem of particle hammer removably connects by bolt and blade row main shaft.Be positioned on the first crushing chamber place madial wall at left shell and right shell body dismountable hard lining 8 is set, and leg-of-mutton sawtooth 81 is set on the madial wall of hard lining; The blade row that is arranged in second crushing chamber comprises 6 flat blades, the little blade row that is positioned at the 3rd crushing chamber comprises 6 flat small blades equally, the plane of middle blade and small blade is parallel with the axis of blade row main shaft, and on the blade row main shaft radially five equilibrium arrange, its with the blade row main shaft between can adopt bolt to be connected equally, in be incline direction and the consistent hypotenuse of madial wall of second crushing chamber and the 3rd crushing chamber on blade and the small blade away from the outer side edges of blade row main shaft, similar with first crushing chamber, left shell and right shell body blade row in the correspondence on second crushing chamber and the 3rd crushing chamber place madial wall, pocket knife row place is provided with dismountable hard lining 8 respectively.
Further, the 3rd crushing chamber rear end at housing is provided with discharging mechanism 7, this discharging mechanism is a centrifugal fan, blower housing and the 3rd crushing chamber are connected as a single entity, the air inlet of centrifugal fan docks with the discharging opening of the 3rd crushing chamber, and the blade 71 of centrifugal fan is installed on the blade row main shaft, and the blade row main shaft then is installed on former and later two bearing blocks of frame, and the front end of blade row main shaft stretches out outside the bearing block of front end, and is connected with drive motors by driving-belt.
In addition, the sidewall of described hopper is provided with circular air inlet 56, and air door 57 is set on the air inlet, and air door is fixed on the sidewall of hopper with a screw, and loosening screw also rotates the area size that air door can be adjusted air door capping air inlet.
The utility model in use, be connected with the pipeline (not shown) of convey materials on the hopper of feeding mechanism, material can be sent in the hopper by pipeline, feed shaft in the hopper drives flight blade and rotates together under the driving of charging motor, when relative flight blade forwards horizontal level to about a pair of, it is just sealed hopper, material is laid on the flight blade, when flight blade is rotated further, progressively open a slit between blade and the hopper side wall, shelving superincumbent material can landing from the slit, and enter in first crushing chamber of housing by the through hole of hopper side wall and the charging aperture of housing, oarse-grained material is told behind the particle hammer bump of rotation the madial wall collision that is provided with sawtooth on the lining with first crushing chamber and cracked again in first crushing chamber, bump with the particle hammer once more after the cracked material bounce-back, so material is ground into tiny particle after the repeated multiple times.Because the swabbing action of the centrifugal fan of discharging mechanism, air-flow in the housing is held rapidly from front end backward and is flowed, air-flow drives in first the crushing chamber interior fine particle and second crushing chamber with its transmission, similar to the situation of first crushing chamber, after bumping, flies to by the middle blade that enters the fine particle of second crushing chamber and high speed rotating the lining madial wall of second crushing chamber, because the lining madial wall is a taper surface, fine particle can be to the front end bounce-back of housing behind bump, taken away by air-flow rapidly avoiding at once, further diminishing through the particle that repeatedly collides the back material, and under the drive of air-flow, enter in the 3rd crushing chamber, pulverizing situation and the situation second crushing chamber in of material in the 3rd crushing chamber is basic identical, material is further pulverized under the effect of small blade, to improve the fineness of final products, the material of finishing pulverizing enters in the centrifugal fan by the discharging opening of housing and the air inlet of centrifugal fan, and send from being located at the tangential air outlet of centrifugal fan shell edge, can connect the conveyance conduit (not shown) on the air outlet, material is sent to by conveyance conduit and stores the place.When the fineness requirement of the kind of material and final products changes, the rotating speed one that can change stepper motor is adjusted the charging rate of material, adjust the size of damper positions simultaneously, and then can change the time of staying of material in housing to adjust the fineness of material with the adjustment air inlet.

Claims (10)

1. multistage grinder, comprise drive unit, transmission mechanism, frame, be fixedly connected on the housing of splitting on the frame, the feeding mechanism that links to each other with the housing charging aperture, be located at the vacuum suction discharging mechanism that the pulverizing in the housing is used blade row and linked to each other with the housing discharging opening, it is characterized in that, described housing (4) is a horizontal type structure, and be spliced to form by left shell (41) and right shell body (42), charging aperture from front end in the housing is provided with first crushing chamber (43) successively, second crushing chamber (44) and the 3rd crushing chamber (45), described pulverizing comprises the some particle hammers (61) that are positioned at first crushing chamber with blade row, be arranged in the flat blade row (62) of second crushing chamber and be positioned at the flat little blade row (63) of the 3rd crushing chamber, described particle hammer, middle blade row and little blade row and blade row main shaft removably connect, and drive unit drives the blade row main shaft by transmission mechanism.
2. multistage grinder according to claim 1, it is characterized in that it is horizontal cylindrical that described first crushing chamber is, second crushing chamber and the 3rd crushing chamber all are the truncated cone of lateral arrangement, the big end of its internal diameter is near charging aperture one side of housing, and the tapering of the frustum of a cone is 70 °~90 °.
3. multistage grinder according to claim 1 is characterized in that, described left shell and right shell body are provided with dismountable hard lining (8) respectively on first crushing chamber, second crushing chamber and the 3rd crushing chamber place madial wall.
4. multistage grinder according to claim 3 is characterized in that, the madial wall of being located at the hard lining in first crushing chamber is provided with sawtooth (81).
5. multistage grinder according to claim 1, it is characterized in that described particle hammer is made up of a cylindricality hammer body (611) and hammer stem (612), the particle hammer is connected with the blade row main shaft by hammer stem, described particle hammer is 6, and radially five equilibrium is arranged on the blade row main shaft.
6. multistage grinder according to claim 1, it is characterized in that, blade row comprises 6 flat middle blades in described, 6 flat small blades are drawn together in described pocket knife package, the plane of blade and small blade is parallel with the axis of blade row main shaft in described, and on the blade row main shaft radially five equilibrium arrange, described on blade and the small blade outer end away from the blade row main shaft be obliquely installed, its incline direction is consistent with the madial wall of second crushing chamber and the 3rd crushing chamber respectively.
7. multistage grinder according to claim 1, it is characterized in that, described feeding mechanism (5) comprises the charging pedestal (51) that the charging aperture side of being located at housing is fixedlyed connected with frame (3), the upper end of charging pedestal is provided with hopper (52), be provided with the through hole that docks with the charging aperture of housing near on the sidewall of housing on the hopper, be provided with the feed shaft (53) of level in the hopper, feed shaft and blade row main shaft are perpendicular, on the feed shaft radially five equilibrium 2 or 4 or 6 flight blades (54) are set, the shape of flight blade and hopper inner chamber match, and feed shaft is driven by charging motor (55).
8. multistage grinder according to claim 7 is characterized in that, described charging motor adopts stepper motor.
9. multistage grinder according to claim 7 is characterized in that, the sidewall of described hopper is provided with air inlet (56), and air inlet is provided with rotating air door (57).
10. multistage grinder according to claim 1 is characterized in that, described discharging mechanism (7) comprises a centrifugal fan, and the air inlet of centrifugal fan docks with the discharging opening of housing rear end.
CN2010202113393U 2010-06-02 2010-06-02 Multi-stage crusher Expired - Fee Related CN201728133U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010202113393U CN201728133U (en) 2010-06-02 2010-06-02 Multi-stage crusher

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Application Number Priority Date Filing Date Title
CN2010202113393U CN201728133U (en) 2010-06-02 2010-06-02 Multi-stage crusher

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CN201728133U true CN201728133U (en) 2011-02-02

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104014406A (en) * 2013-03-01 2014-09-03 郎溪县恒云工程机械有限公司 Novel coal breaker
CN104383981A (en) * 2014-10-16 2015-03-04 贵州良济药业有限公司 Traditional Chinese medicine preparation apparatus
CN104707695A (en) * 2015-02-12 2015-06-17 天津市弘亚润滑粉制造有限公司 Crusher
CN105536948A (en) * 2015-12-31 2016-05-04 湖北天运消音防振新材料有限公司 Waste cloth smashing device
CN105597871A (en) * 2016-03-17 2016-05-25 张伟伟 Dry multi-level pulverizing mill and pulverizing production system
CN105597875A (en) * 2015-12-23 2016-05-25 苏州市凯业金属制品有限公司 Powder pulverizer
CN106140438A (en) * 2016-08-25 2016-11-23 王阳 The breaking method of Ore and apparatus for work in a kind of ore dressing process
CN107149964A (en) * 2017-07-19 2017-09-12 合盛硅业股份有限公司 A kind of silica flour pulverizer
CN113617458A (en) * 2021-08-03 2021-11-09 温州顶历医疗器械有限公司 Novel superfine pulverizer

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104014406A (en) * 2013-03-01 2014-09-03 郎溪县恒云工程机械有限公司 Novel coal breaker
CN104383981A (en) * 2014-10-16 2015-03-04 贵州良济药业有限公司 Traditional Chinese medicine preparation apparatus
CN104707695A (en) * 2015-02-12 2015-06-17 天津市弘亚润滑粉制造有限公司 Crusher
CN105597875A (en) * 2015-12-23 2016-05-25 苏州市凯业金属制品有限公司 Powder pulverizer
CN105536948A (en) * 2015-12-31 2016-05-04 湖北天运消音防振新材料有限公司 Waste cloth smashing device
CN105597871A (en) * 2016-03-17 2016-05-25 张伟伟 Dry multi-level pulverizing mill and pulverizing production system
CN105597871B (en) * 2016-03-17 2018-04-06 张伟伟 A kind of dry type multilevel grinding machine and grinding production system
CN106140438A (en) * 2016-08-25 2016-11-23 王阳 The breaking method of Ore and apparatus for work in a kind of ore dressing process
CN107149964A (en) * 2017-07-19 2017-09-12 合盛硅业股份有限公司 A kind of silica flour pulverizer
CN113617458A (en) * 2021-08-03 2021-11-09 温州顶历医疗器械有限公司 Novel superfine pulverizer

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GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110202

Termination date: 20140602