CN107715989B - Multistage damage-proof roller press-grinding device - Google Patents
Multistage damage-proof roller press-grinding device Download PDFInfo
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- CN107715989B CN107715989B CN201711251613.2A CN201711251613A CN107715989B CN 107715989 B CN107715989 B CN 107715989B CN 201711251613 A CN201711251613 A CN 201711251613A CN 107715989 B CN107715989 B CN 107715989B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/30—Shape or construction of rollers
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Abstract
The invention relates to a multistage damage-proof roller press-grinding device.A plurality of slots are arranged on a processing roller, roller teeth are embedded in the slots, springs and sleeves are arranged at the lower parts of the roller teeth, and the roller teeth can retract into the slots when being subjected to larger external force, so that the damage of the roller teeth caused by overlarge external force is avoided, and the roller teeth are protected. The processing roller is sequentially divided into a plurality of different areas according to the advancing direction of the processing materials, each area is provided with a corresponding slotted hole, roller teeth, a sleeve and a spring which are matched with the roller teeth, and the springs in the different areas have different maximum elastic forces. In addition, the springs with different maximum elastic forces can be replaced according to different processing materials, so that the adaptability of the roller is further improved.
Description
Technical Field
The invention relates to a material processing device, in particular to a multistage damage-proof roller press-grinding device.
Background
A roller crushing processing device, in particular to a roller press grinding device, is a common and common processing device for crushing materials, and in the general processing process, the roller teeth arranged on a processing roller are used for tearing and beating material blocks fed into the processing roller, so that the blocky materials are crushed or the sizes of the blocky materials are reduced.
The treatment rollers in the roller treatment device in the prior art are all non-adjustable rollers with fixed tooth shapes and tooth heights, and researches show that the treatment force of the treatment rollers on materials and the treatment load on the roller teeth are directly related to the tooth heights of the roller teeth, if the tooth heights of the roller teeth are large, the treatment force on the materials is also large, correspondingly, the treatment load on the roller teeth is also large, and vice versa. Because the processing roller is always driven by the motor to rotate at a high speed, if the instantaneous processing load on the roller teeth is overlarge, the roller teeth are likely to be accidentally damaged, and once the roller teeth on the roller are accidentally damaged, such as tooth breakage, tooth breakage and the like, the processing roller is basically scrapped in an area, so that great use cost is brought to production enterprises.
Through research, the drum-type processing device has a bigger fractional size when processing the material, normally just the material is fed into, and its processing load to cylinder tooth is also the biggest, and along with the going on of handling, the foreign matter of material is constantly torn, is pulled off, and its size is littleer and smaller, and then also littleer and smaller to the processing load that cylinder tooth applyed. That is, the roller teeth are subjected to the greatest external load immediately after feeding and then gradually decrease. According to the discovery, different tooth profile heights can be designed to adapt to different processing loads, but similar products do not exist in the market at present, so that a need is urgently needed to develop a novel roller processing device, the roller tooth height can be adjusted according to the processing load, the technical effects of protecting the roller teeth and processing in sequence are achieved, and the damage to the bast fibers caused by excessive processing can be prevented.
Disclosure of Invention
In order to solve the problems related to the background technology, the invention provides a roller processing device capable of adaptively adjusting the tooth profile height of the roller teeth, and the anti-damage technical effect of the roller teeth and the bast fibers can be realized by virtue of the self-adjusting function of the tooth profile height.
In order to achieve the technical effects, the technical scheme of the invention is as follows: a multi-stage damage-proof roller press-grinding device comprises a rack and a roller processing device, wherein the roller processing device is obliquely arranged on the rack, a feeding device is arranged at the upstream position of the roller processing device, and a discharge hole and a discharge slideway are arranged at the downstream position of the roller processing device; the roller treatment device is connected with a driving device, a flushing water pump is arranged on the roller treatment device, and the flushing water pump is connected with a flushing water pipe; the drum treatment device comprises a drum peripheral treatment side wall and a treatment drum, and the outlet end of the flushing water pipe is positioned in a gap between the drum peripheral treatment side wall and the treatment drum; the treatment roller is a cylindrical solid roller, and a driving shaft is arranged at the central position of two sides of the treatment roller; the processing roller is provided with a plurality of slotted holes, and the slotted holes comprise a first slotted hole section and a second slotted hole section; the processing roller is provided with a plurality of roller teeth corresponding to the slotted holes, the roller teeth are all positioned in the slotted holes on the corresponding processing roller, and the tooth top surfaces of the roller teeth are higher than the outer edges of the slotted holes; the slotted holes are arranged in the diameter direction of the processing roller, and the shapes of the slotted holes and the roller teeth positioned in the slotted holes are axisymmetric relative to the diameter of the processing roller; the roller teeth are arranged in the first slotted hole section of the slotted hole and are matched with the appearance of the first slotted hole section, and the roller teeth are attached to the inner wall of the first slotted hole section and can move in the first slotted hole section along the radial direction of the processing roller; the bottom of the roller tooth is provided with a sleeve, one end of the sleeve is fixedly connected to the bottom of the roller tooth, the other end of the sleeve is positioned in the second slotted hole section, the appearance of the sleeve is matched with the second slotted hole section, the outer wall of the sleeve is attached to the inner wall of the second slotted hole section and can move in the second slotted hole section along the radial direction of the processing roller; the outer side surface of the bottom of the sleeve is provided with a sleeve limiting bulge, the inner side wall of the top of the second slotted hole section is provided with a slotted hole limiting bulge, the sleeve limiting bulge and the slotted hole limiting bulge are matched to limit the radial displacement range of the sleeve in the treatment roller, and the sleeve is prevented from sliding out of the second slotted hole section; a spring is arranged in the sleeve, one end of the spring is fixedly connected to the bottom of the second slotted hole section, and the other end of the spring is positioned in the sleeve and fixedly connected to the bottom of the roller tooth; the sleeve is axisymmetrical with respect to the diameter of the treatment drum; the processing roller is sequentially divided into a plurality of different areas according to the advancing direction of the processing materials, each area is provided with a corresponding slotted hole, roller teeth, a sleeve and a spring which are matched with the roller teeth, and the springs in the different areas have different maximum elastic forces.
Preferably, the initial length of the spring is such that the top land of the roller tooth is higher than the outer edge of the slot.
Preferably, the maximum spring force of the spring in the same region is less than the maximum pressure exerted by the material on the drum teeth by the peripheral treatment side wall of the drum.
Preferably, the spring is detachably fixed at the bottom of the second slotted hole section and the bottom of the roller tooth.
Preferably, the maximum spring force of the springs in different regions of the processing drum increases successively in the direction of travel of the process material.
Preferably, the sleeve limiting protrusion and the slotted hole limiting protrusion are limited in a staggered limiting mode, and the limiting effect can be relieved.
Advantageous effects
In the using process, the material to be processed is sent into the roller processing device, the material is scattered between the peripheral processing side wall of the roller and the processing roller, the processing roller is provided with roller teeth, and the material is extruded and torn by the peripheral processing side wall of the roller and the processing roller. The drum teeth are embedded in the slots of the treatment drum and can be displaced within the slots to a certain extent, i.e. can emerge from the slots or can be pressed into the slots under the action of external forces. The bottom of the roller tooth is provided with a sleeve and a spring, the sleeve is positioned in the second slotted hole section, and the roller tooth can be stably kept in the slotted hole under the action of the sleeve, so that the roller tooth is prevented from being pulled out of the slotted hole by the axial external force of the processing roller; the second slotted hole and the sleeve are provided with limiting devices, the limiting devices can prevent roller teeth arranged on the sleeve from being popped out from the slotted holes by the elasticity of the spring, namely, the roller teeth are stably kept in the roller slotted holes in the radial direction and the axial direction, the roller teeth are matched with the appearance of the first slotted hole section, the roller teeth are attached to the inner wall of the first slotted hole section, and then the roller teeth are stably held in the slotted holes. The spring is arranged at the bottom of the roller tooth, the spring has a certain compression amount, under the initial state, the spring enables the roller tooth to extend out of the outer edge of the slotted hole, a bulge is formed on the surface of the roller, the spring keeps a certain supporting force and is not compressed by the pressure of the material to return to the slotted hole, and the bulges can act on the material to be processed to tear and crush the material; if a large material or a hard material is encountered in the treatment process, the material exceeds the bearable capacity of the treatment roller, in this case, the material also inevitably exceeds the maximum elastic force of the spring, so that the elastic force of the spring can be offset by large pressure, the roller teeth are pressed and retracted into the slotted holes, namely, the roller teeth are prevented from being hard-touched with the materials, and further the damage of the roller teeth caused by overlarge external force, such as tooth beating, tooth breaking and the like, is avoided, and the roller teeth are protected. When the material with larger ratio or exceeding the processing capacity of the roller is discharged from the roller, the spring pushes out the roller teeth from the slotted hole again to enable the tooth top surface to be higher than the outer edge of the slotted hole, and the processing work according with the processing capacity is carried out. The processing roller is sequentially divided into a plurality of different areas according to the advancing direction of the processing materials, each area is provided with a corresponding slotted hole, roller teeth, a sleeve and a spring which are matched with the roller teeth, and the springs in the different areas have different maximum elastic forces. The maximum spring force of the springs in different areas of the processing drum increases in sequence in the direction of travel of the process material. In the processing drum, the material just entering the processing drum is generally larger in size along the advancing direction of the processed material, the load applied to the drum teeth on the processing drum is also largest, in order to avoid damaging the drum teeth and the side wall of the drum, the material is not suitable to be hard-touched with the large-size material, the region adopts a spring with the largest elasticity and is smaller, the large-size material is firstly subjected to primary processing, the surface of the material is crushed and ground, the size of the material is preliminarily reduced, and the material is then conveyed to a subsequent drum region for further processing. The maximum elastic force of the spring arranged in the front area of the processing roller is smaller, and the size of the material is gradually reduced by adopting a soft-gram method; the maximum elastic force of the springs in the subsequent processing area is gradually increased in sequence, the size of the materials is reduced through the processing of the previous area, and if the maximum elastic force of the springs is set to be smaller, the expected processing effect on the materials cannot be achieved. The springs with different maximum elastic forces are adopted, the maximum elastic forces of the springs are sequentially increased along the material processing direction, the materials are subjected to progressive treatment force, a good treatment effect can be obtained, and damage to objects such as tooth beating and the like caused by strong treatment can be effectively avoided. In addition, the springs with different maximum elastic forces can be replaced according to different processing materials, so that the adaptability of the roller is further improved.
Drawings
FIG. 1 is a schematic view of the main structure of the present invention;
FIG. 2 is a schematic side view of a processing drum;
fig. 3 is a schematic cross-sectional structure of the processing drum.
In the figure, 1: side wall, 2: treatment drum, 3: roller tooth, 4: drive shaft, 5: sleeve, 6: first slot segment, 7: second slot segment, 8: spring, 12: frame, 13: drum processing device, 14: feeding device, 15: discharge chute, 16: drive device, 17: a flushing water pump 18 is a flushing water pipe.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and the accompanying drawings.
As shown in fig. 1-3, a multi-stage damage-proof roller press-grinding device comprises a frame 12, a roller processing device 13, wherein the roller processing device 13 is obliquely arranged on the frame 12, a feeding device 14 is arranged at the upstream position of the roller processing device 13, and a discharge hole and a discharge slideway 15 are arranged at the downstream position of the roller processing device 13; the roller processing device 13 is connected with a driving device 16, a flushing water pump 17 is arranged on the roller processing device 13, and the flushing water pump 17 is connected with a flushing water pipe 18; the roller processing device 13 comprises a roller peripheral processing side wall 1 and a processing roller 2, the outlet end of a flushing water pipe 18 is positioned in the gap between the roller peripheral processing side wall 1 and the processing roller 2, a flushing water pump 17 pressurizes water to flush the processing roller 2, so that the crushed materials are flushed out, and the materials are generally cleaned after the previous batch of materials are processed, so that the materials are prevented from being influenced; the treatment roller 2 is a cylindrical solid roller, and a driving shaft 4 is arranged at the central position of two sides of the treatment roller 2; the processing roller 2 is provided with a plurality of slotted holes, and the slotted holes comprise a first slotted hole section 6 and a second slotted hole section 7; a plurality of roller teeth 3 are arranged on the processing roller 2 corresponding to the slotted holes, the roller teeth 3 are all positioned in the slotted holes on the corresponding processing roller 2, and the tooth top surfaces of the roller teeth 3 are higher than the outer edges of the slotted holes; the slotted holes are arranged in the diameter direction of the processing roller 2, and the shapes of the slotted holes and the roller teeth 3 positioned in the slotted holes are in axial symmetry relative to the diameter of the processing roller 2; the roller teeth 3 are arranged in the first slotted hole section 6 of the slotted hole and are matched with the appearance of the first slotted hole section 6, and the roller teeth 3 are attached to the inner wall of the first slotted hole section 6 and can move in the first slotted hole section 6 along the radial direction of the processing roller 2; the bottom of the roller tooth 3 is provided with a sleeve 5, one end of the sleeve 5 is fixedly connected to the bottom of the roller tooth 3, the other end of the sleeve 5 is positioned in a second slotted hole section 7, the appearance of the sleeve 5 is matched with the second slotted hole section 7, the outer wall of the sleeve 5 is attached to the inner wall of the second slotted hole section 7 and can move in the second slotted hole section 7 along the radial direction of the processing roller 2; a sleeve limiting bulge is arranged on the outer side face of the bottom of the sleeve 5, a slotted hole limiting bulge is arranged on the inner side wall of the top of the second slotted hole section 7, the sleeve limiting bulge and the slotted hole limiting bulge are matched to limit the radial displacement range of the sleeve 5 in the treatment roller 2, and the sleeve 5 is prevented from sliding out of the second slotted hole section 7; a spring 8 is arranged in the sleeve 5, one end of the spring 8 is fixedly connected to the bottom of the second slotted hole section 7, and the other end of the spring 8 is positioned in the sleeve 5 and fixedly connected to the bottom of the roller teeth 3; the sleeve 5 is axisymmetrical with respect to the diameter of the treatment drum 2; the processing roller 2 is sequentially divided into a plurality of different areas according to the advancing direction of the processing materials, each area is provided with a corresponding slotted hole, roller teeth 5, a sleeve 5 matched with the roller teeth 3 and springs 8, and the springs 8 in the different areas have different maximum elastic forces.
In order to ensure the material-handling action of the drum tooth, the initial length of the spring is such that the tooth tip face of the drum tooth is higher than the outer edge of the slotted hole.
In order to enable the roller teeth to retract into the slotted holes when being subjected to larger external force, the maximum elastic force of the spring in the same area is smaller than the maximum pressure applied to the roller teeth by the material on the peripheral processing side wall of the roller.
In order to facilitate the disassembly and replacement of the spring, the spring is fixedly connected to the bottom of the second groove section and the bottom of the roller teeth in a detachable mode, the sleeve limiting protrusion and the groove hole limiting protrusion are limited in a staggered limiting mode, and the limiting effect can be relieved.
The maximum spring force of the springs in different areas of the processing drum increases in sequence in the direction of travel of the process material.
In the using process, the material to be processed is sent into the roller processing device, the material is scattered between the peripheral processing side wall of the roller and the processing roller, the processing roller is provided with roller teeth, and the material is extruded and torn by the peripheral processing side wall of the roller and the processing roller. The drum teeth are embedded in the slots of the treatment drum and can be displaced within the slots to a certain extent, i.e. can emerge from the slots or can be pressed into the slots under the action of external forces. The bottom of the roller tooth is provided with a sleeve and a spring, the sleeve is positioned in the second slotted hole section, and the roller tooth can be stably kept in the slotted hole under the action of the sleeve, so that the roller tooth is prevented from being pulled out of the slotted hole by the axial external force of the processing roller; the second slotted hole and the sleeve are provided with limiting devices, the limiting devices can prevent roller teeth arranged on the sleeve from being popped out from the slotted holes by the elasticity of the spring, namely, the roller teeth are stably kept in the roller slotted holes in the radial direction and the axial direction, the roller teeth are matched with the appearance of the first slotted hole section, the roller teeth are attached to the inner wall of the first slotted hole section, and then the roller teeth are stably held in the slotted holes. The spring is arranged at the bottom of the roller tooth, the spring has a certain compression amount, under the initial state, the spring enables the roller tooth to extend out of the outer edge of the slotted hole, a bulge is formed on the surface of the roller, the spring keeps a certain supporting force and is not compressed by the pressure of the material to return to the slotted hole, and the bulges can act on the material to be processed to tear and crush the material; if a large material or a hard material is encountered in the treatment process, the material exceeds the bearable capacity of the treatment roller, in this case, the material also inevitably exceeds the maximum elastic force of the spring, so that the elastic force of the spring can be offset by large pressure, the roller teeth are pressed and retracted into the slotted holes, namely, the roller teeth are prevented from being hard-touched with the materials, and further the damage of the roller teeth caused by overlarge external force, such as tooth beating, tooth breaking and the like, is avoided, and the roller teeth are protected. When the material with larger ratio or exceeding the processing capacity of the roller is discharged from the roller, the spring pushes out the roller teeth from the slotted hole again to enable the tooth top surface to be higher than the outer edge of the slotted hole, and the processing work according with the processing capacity is carried out. The processing roller is sequentially divided into a plurality of different areas according to the advancing direction of the processing materials, each area is provided with a corresponding slotted hole, roller teeth, a sleeve and a spring which are matched with the roller teeth, and the springs in the different areas have different maximum elastic forces. The maximum spring force of the springs in different areas of the processing drum increases in sequence in the direction of travel of the process material. In the processing drum, the material just entering the processing drum is generally larger in size along the advancing direction of the processed material, the load applied to the drum teeth on the processing drum is also largest, in order to avoid damaging the drum teeth and the side wall of the drum, the material is not suitable to be hard-touched with the large-size material, the region adopts a spring with the largest elasticity and is smaller, the large-size material is firstly subjected to primary processing, the surface of the material is crushed and ground, the size of the material is preliminarily reduced, and the material is then conveyed to a subsequent drum region for further processing. The maximum elastic force of the spring arranged in the front area of the processing roller is smaller, and the size of the material is gradually reduced by adopting a soft-gram method; the maximum elastic force of the springs in the subsequent processing area is gradually increased in sequence, the size of the materials is reduced through the processing of the previous area, and if the maximum elastic force of the springs is set to be smaller, the expected processing effect on the materials cannot be achieved. The springs with different maximum elastic forces are adopted, the maximum elastic forces of the springs are sequentially increased along the material processing direction, the materials are subjected to progressive treatment force, a good treatment effect can be obtained, and damage to objects such as tooth beating and the like caused by strong treatment can be effectively avoided. In addition, the springs with different maximum elastic forces can be replaced according to different processing materials, so that the adaptability of the roller is further improved.
Claims (4)
1. A multi-stage damage-proof roller press-grinding device comprises a rack and a roller processing device, wherein the roller processing device is obliquely arranged on the rack, a feeding device is arranged at the upstream position of the roller processing device, and a discharge hole and a discharge slideway are arranged at the downstream position of the roller processing device; the roller treatment device is connected with a driving device, a flushing water pump is arranged on the roller treatment device, and the flushing water pump is connected with a flushing water pipe; the device is characterized in that the roller processing device comprises a roller peripheral processing side wall and a processing roller, and the outlet end of a flushing water pipe is positioned in a gap between the roller peripheral processing side wall and the processing roller; the treatment roller is a cylindrical solid roller, and a driving shaft is arranged at the central position of two sides of the treatment roller; the processing roller is provided with a plurality of slotted holes, and the slotted holes comprise a first slotted hole section and a second slotted hole section; the processing roller is provided with a plurality of roller teeth corresponding to the slotted holes, the roller teeth are all positioned in the slotted holes on the corresponding processing roller, and the tooth top surfaces of the roller teeth are higher than the outer edges of the slotted holes; the slotted holes are arranged in the diameter direction of the processing roller, and the shapes of the slotted holes and the roller teeth positioned in the slotted holes are axisymmetric relative to the diameter of the processing roller; the roller teeth are arranged in the first slotted hole section of the slotted hole and are matched with the appearance of the first slotted hole section, and the roller teeth are attached to the inner wall of the first slotted hole section and can move in the first slotted hole section along the radial direction of the processing roller; the bottom of the roller tooth is provided with a sleeve, one end of the sleeve is fixedly connected to the bottom of the roller tooth, the other end of the sleeve is positioned in the second slotted hole section, the appearance of the sleeve is matched with the second slotted hole section, the outer wall of the sleeve is attached to the inner wall of the second slotted hole section and can move in the second slotted hole section along the radial direction of the processing roller; the outer side surface of the bottom of the sleeve is provided with a sleeve limiting bulge, the inner side wall of the top of the second slotted hole section is provided with a slotted hole limiting bulge, the sleeve limiting bulge and the slotted hole limiting bulge are matched to limit the radial displacement range of the sleeve in the treatment roller, and the sleeve is prevented from sliding out of the second slotted hole section; a spring is arranged in the sleeve, one end of the spring is fixedly connected to the bottom of the second slotted hole section, and the other end of the spring is positioned in the sleeve and fixedly connected to the bottom of the roller tooth; the sleeve is axisymmetrical with respect to the diameter of the treatment drum; the processing roller is sequentially divided into a plurality of different areas according to the advancing direction of the processing materials, each area is provided with a corresponding slotted hole, a roller tooth, a sleeve and a spring which are matched with the roller tooth, the springs in the different areas have different maximum elastic forces, and the initial length of the spring enables the tooth top surface of the roller tooth to be higher than the outer edge of the slotted hole.
2. The multi-stage damage-preventing roller burnishing apparatus of claim 1, wherein the maximum spring force of the spring in the same region is less than the maximum pressure exerted by the peripheral treatment sidewall of the roller on the roller teeth via the material, and the spring is detachably secured to the bottom of the second grooved hole section and the bottom of the roller teeth.
3. The multi-stage damage-preventing roller burnishing apparatus of claim 2, wherein the maximum spring force of the springs in different regions of the processing roller increases sequentially in the direction of travel of the work material.
4. The multi-stage damage-preventing roller press-grinding device as claimed in claim 3, wherein the sleeve limiting protrusions and the groove hole limiting protrusions are limited in a staggered limiting manner, and the limiting function can be released.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711251613.2A CN107715989B (en) | 2017-12-01 | 2017-12-01 | Multistage damage-proof roller press-grinding device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711251613.2A CN107715989B (en) | 2017-12-01 | 2017-12-01 | Multistage damage-proof roller press-grinding device |
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| CN107715989A CN107715989A (en) | 2018-02-23 |
| CN107715989B true CN107715989B (en) | 2020-06-30 |
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| CN201711251613.2A Active CN107715989B (en) | 2017-12-01 | 2017-12-01 | Multistage damage-proof roller press-grinding device |
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| CN115254266B (en) * | 2022-08-01 | 2023-12-19 | 浙江联创焊接技术有限公司 | High-pressure-resistant wear-resistant extrusion roller and installation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2148752C3 (en) * | 1971-09-30 | 1979-11-22 | Hazemag Dr. E. Andreas Gmbh & Co, 4400 Muenster | Device for fixing blow bars in impact mill rotors |
| CN203044094U (en) * | 2012-11-28 | 2013-07-10 | 江阴市大阪涂料有限公司 | Horizontal type sand mill for coatings |
| CN204365409U (en) * | 2014-12-30 | 2015-06-03 | 开县百安居建材有限公司 | Impact breaker |
| CN204523060U (en) * | 2015-01-27 | 2015-08-05 | 罗文凤 | A kind of cement plant roll crushing grinding all-in-one machine |
| CN204892017U (en) * | 2015-06-25 | 2015-12-23 | 余苏祥 | Ceramic manufacture uses energy -concerving and environment -protective ball mill |
| CN205109747U (en) * | 2015-11-20 | 2016-03-30 | 西安外事学院 | Building material reducing mechanism |
| CN205269768U (en) * | 2015-12-17 | 2016-06-01 | 中国矿业大学 | Novel selective crushing double -geared roller crusher |
| CN205700815U (en) * | 2016-04-25 | 2016-11-23 | 枣庄市金山机械有限公司 | A kind of impact breaker |
| CN106732982B (en) * | 2016-12-26 | 2020-11-17 | 广东博晖华升科技有限公司 | Powder crushing method and device |
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