CN107185628A - A kind of frequency conversion type vibrates sampling machine - Google Patents
A kind of frequency conversion type vibrates sampling machine Download PDFInfo
- Publication number
- CN107185628A CN107185628A CN201710407798.5A CN201710407798A CN107185628A CN 107185628 A CN107185628 A CN 107185628A CN 201710407798 A CN201710407798 A CN 201710407798A CN 107185628 A CN107185628 A CN 107185628A
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- China
- Prior art keywords
- screen cloth
- material cup
- frequency conversion
- mesh
- conversion type
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- 238000005070 sampling Methods 0.000 title claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 20
- 239000004744 fabric Substances 0.000 claims abstract description 57
- 239000000463 material Substances 0.000 claims abstract description 52
- 238000012216 screening Methods 0.000 claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000227 grinding Methods 0.000 abstract description 2
- 239000000523 sample Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 4
- 235000013339 cereals Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005549 size reduction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 230000005352 galvanomagnetic phenomena Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000006101 laboratory sample Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C1/00—Crushing or disintegrating by reciprocating members
- B02C1/12—Mills with non-rotating spiked members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
Sampling machine is vibrated the present invention relates to a kind of frequency conversion type, including：Casing, crushing system, transmission system and screening system, PLC programmable controllers and transformer, it is characterised in that：The crushing system includes material cup, coil and sealing shell and the tubular type material being arranged in material cup hammer；Described transmission system includes bearing, runing rest, and the belt pulley I on runing rest, the motor installed in bearing bottom, belt pulley II, belt is connected motor shaft and runing rest by belt pulley I and belt pulley II；Described screening system includes being arranged on the screening motor of material cup bottom, the first screen cloth for being arranged on material cup internal upper part and the component of the second screen cloth two for being arranged on material cup bottom.Its advantage is：By the way that electromagnetic type is crushed into structure and the double-deck combination for screening structure instead of existing impact grinding crushing and screening device, it is possible to achieve high efficiency, high-quality screening crushing effect.
Description
Technical field
Triage techniques field, more particularly to a kind of vibration sample preparation of frequency conversion type are crushed the invention belongs to a kind of electromagnetic type ore
Machine.
Background technology
Electromagnetic type ore sampling machine drives expects pipe that material is broken into trickle state rapidly using electromagnetic attraction principle, has
Small volume, easy to operate, noise be low, totally-enclosed the characteristics of do not stir up a cloud of dust, and is novel experimental pulverizer, in laboratory sample preparation
Field is widely used.
Existing crushing and screening integrated device, is typically employed in dress and centers screen cloth the ore after crushing is screened.
Such as A of Chinese patent literature CN 105750061 disclose a kind of multistage screening formula crushing and screening equipment, and the equipment sets vibratory sieve
Component is selected quickly screen and selective purpose can be reached, but its multilevel screen is set to individual layer, after crushed
Ore particle diameter differ, crushing meticulous ore sample can equally be entered in sample collection box by screen cloth, and this situation is to essence
Thin experiment influence is serious.
Existing electromagnetic type ore sampling machine, can control whole crushing process is stable to carry out, reach efficient, stable crushing
Effect, but the problem of ore crushes meticulous can not be still solved, systematicness equally is not carried out yet to crushing process electricity consumption situation
Analysis, so the utilization rate of the energy can not be improved to greatest extent.Such as Y of Chinese patent literature CN 2349568 are disclosed
A kind of electromagnet vibration table type sample maker, belongs to size reduction machinery field, and upper hammer is with identical speed within the whole crushed work time
Progress is crushed to ore, and the dynamics that ore is subject in crushing process is identical, but there is ore crushing in the crushing process later stage
The problem of meticulous, energy waste.
Use for laboratory sampling machine is crushed to ore, according to different experiments to sample grain purpose requirement, unavoidably
Ore sample after sampling machine preliminary crushing is screened.Such as A of Chinese patent literature CN 104722371 disclose a kind of rock
Stone crushing and screening device, belongs to size reduction machinery field.Existing crushing and screening device uses the setting of individual layer screen cloth, finished product accuracy
It is not high, it is impossible to meet the requirement finely tested；Existing electromagnetic vibration sampling machine is shaken during crushed work with identical
Dynamic frequency is carried out, the problem of causing to crush meticulous, while the waste to the energy is inevitable；While existing ore crushing and screening
Device is complicated, noise is big, dynamics is uneven, the broken sample quality of crush efficiency self raising flour is poor, efficiency is low.
The content of the invention
The purpose of the present invention is that sample quality is good, efficiency high frequency conversion in order to solve the above technical problems, providing a kind of crushing
Formula vibrates sampling machine.
The purpose of the present invention is achieved through the following technical solutions.
A kind of frequency conversion type vibration sampling machine of the present invention, including：Casing, crushing system, transmission system and screening system,
PLC programmable controllers and transformer, it is characterised in that：
The crushing system includes material cup, the coil being arranged on the outside of material cup and sealing shell, is arranged on the tubular type material in material cup
Hammer, described coil is connected with transformer and PLC programmable controllers；
Described transmission system includes the bearing being arranged on the casing, and one end is fixed on the outer middle side part of sealing shell, another
The runing rest being fixedly connected with holder top is held, the belt pulley I on runing rest is fixedly mounted on bearing bottom
Motor, is provided with belt pulley II at driving motor output shaft end, belt by belt pulley I and belt pulley II by motor shaft and
Runing rest is connected；
Described screening system includes being arranged on the screening motor of material cup bottom, is arranged on the first screen cloth of material cup internal upper part and sets
Put the component of the second screen cloth two in material cup bottom.
Preferably, the present invention sets neck in the material cup upper inside wall, is set and institute in first screen cloth periphery
State the projection that neck is meshed, the projection of the first screen cloth periphery is screwed in the neck of the material cup inwall, pin described the
One screen cloth, in material cup, the bottom of the first screen cloth is additionally provided with stopping means.
Preferably, the described component of the second screen cloth two is by the containing box that is arranged on cabinet base, on containing box
Four spring stacks, the second screen cloth installed in containing box internal upper part and the vibration machine institute group installed in containing box bottom
Into.
Preferably, described vibration machine is two.
Preferably, the mesh of the first described screen cloth is the mesh of 60 mesh~200.
Preferably, the mesh of the second described screen cloth is less than the mesh of the first screen cloth, is the mesh of 70 mesh~210.
Beneficial effects of the present invention are, by the first screen cloth and the R. concomitans of the second screen cloth, to be recycled into so as to improve
The precision of product, has better met the requirement of high accuracy experiment, and the second screen cloth facilitates the receipts of sample independently of the setting of casing
Collection；Used cooperatively by PLC programmable controllers and transformer, tubular type material hammer up-down vibration in the way of frequency conversion is carried out powder
It is broken, so as to solve the problem of crushing is uneven, meticulous, improve the efficiency of crushing, reduce the loss of the energy；By by electricity
Magnetic-type crushes structure and the combination of double-deck screening structure replaces existing impact grinding crushing and screening device, it is possible to achieve efficiently
Rate, high-quality screening crushing effect.
Brief description of the drawings：
Fig. 1 vibrates the overall structure diagram of sampling machine for a kind of frequency conversion type of the invention.
Fig. 2 vibrates the overall structure stereo unfolding schematic diagram of sampling machine for a kind of frequency conversion type of the invention.
Fig. 3 is Fig. 2 side view.
Embodiment：
The present invention is described in further detail below according to drawings and examples.
As shown in Figure 1-Figure 3, a kind of frequency conversion type of the invention vibration sampling machine, including：Casing 1, crushing system, power train
System and screening system, PLC programmable controllers and transformer, it is characterised in that：
The crushing system includes material cup 2, is arranged on the coil 3 and sealing shell 4 in the outside of material cup 2, its sealing shell 4 is to protect
Protective ring, is arranged on the tubular type material hammer 15 in material cup 2, described coil 3 is connected with transformer and PLC programmable controllers
Connect；PLC programmable controllers use commercially available prod, during work, and the PLC transfers signals to transformation according to programming
Come in control coil to produce galvanomagnetic-effect by electric current in the size by electric current, coil in device, therefore coil can produce change
Electromagnetic attraction act on tubular type material hammer 15, to realize that tubular type material hammers the vibration of 15 Up/Down Conversion rates into shape, and then reach to ore sample
The effect crushed.
Transmission system of the present invention includes the bearing 5 being arranged on the casing 1, and one end is fixed on sealing shell 4
Outer middle side part, the runing rest 6 that the other end is fixedly connected with the top of bearing 5, the belt pulley I 7 on runing rest 6, Gu
Dingan County is mounted in the motor 9 of the bottom of bearing 5, and belt pulley II 10 is provided with driving motor output shaft end, and belt 8 crosses belt pulley
I 7 and belt pulley II 10 motor shaft and runing rest 6 are connected；When the motor 9 is started working, pass through belt pulley I 7
Rotated with the belt drive runing rest 6 on belt pulley II 10, and then realize that the 180 degree of material cup 2 is rotatable.
Screening system of the present invention is arranged on the screening motor 12 of the bottom of material cup 2, including is arranged on the internal upper part of material cup 2
The first screen cloth 13 and be arranged on the component 11 of the second screen cloth two of the bottom of material cup 2.
Preferably, the present invention sets neck 16 in the upper inside wall of material cup 2, is set in the periphery of the first screen cloth 13
The projection 14 being meshed with the neck 16, the projection 14 of the periphery of the first screen cloth 13 screws in the neck 16 of the material cup inwall
In, first screen cloth 13 is pinned, in material cup 2, the bottom of the first screen cloth 13 is additionally provided with stopping means 17, the stopping means
17 avoid during the tubular type material hammers 14 up-down vibrations into shape the first screen cloth 13 are damaged；The net of the first described screen cloth 13
Hole is the mesh of 60 mesh~200.The design of the structure not only facilitates the installation and replacing of the first screen cloth 13, while also ensure that screening work
Make the stabilization of the first screen cloth 13 among process.
Preferably, the second described screen assemblies are by the containing box 11-2 that is arranged on cabinet base, installed in containing box
Four spring stack 11-3 on 11-2, installed in the second screen cloth 11-1 of containing box 11-2 internal upper parts and installed in containing box 11-2
The vibration machine 11-4 of bottom is constituted, and described vibration machine 11-4 is two.The vibration machine 11-4 vibrations
Spring stack 11-3 is deformed upon, and then realizes the second screen cloth 11-1 vibration, programmed screening process is realized rapidly and efficiently
Completion；Second screen cloth facilitates the collection of sample independently of the setting of casing；
When the crushing system end-of-job carries out screening operation, in the bottom of material cup 2, size-reduced material is through the material cup 2
180 degree rotation is dropped into the first screen cloth 13, and the vibration of the material cup 2 is controlled by being arranged on the motor 12 of the bottom of material cup 2, is entered
The first time of ore quickly screens in the first screen cloth of row 13, and the periphery of coil 3 is provided with sealing shell 4, realizes in rotary work
Protection among process to the coil 3；And screen the ore sample of end for the first time and drop into the by the described first 13 nets of sieve
In two screen cloth 11-1, programmed screening is carried out.
The second screen cloth 11-1 is dropped into by the first screened ore sample of first screen cloth 13 and carries out secondary sieve
Choosing；It is the mesh of 70 mesh~210, finally, by because the second screen cloth 11-1 mesh specification is slightly less than the mesh of the first screen cloth 13
The grain mesh of the two garbled ore samples of screen cloth 11-1 can better meet requirement.
The setting of Double-layer screen of the present invention, improves the precision for reclaiming finished product, meets the requirement of high accuracy experiment；Its root
According to the voltage of the program adjustment control transformer output set to PLC, control crushing process reaches the function of vibration speed change, improved
Ore crushes the saving energy that is meticulous and causing, improves efficiency；Efficient electromagnetic type is crushed into sampling machine and automatic simultaneously
Screening function is combined, and realizes automatic integratedization of electromagnetism crushing and screening.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations, any to be familiar with the art
Technical staff, can also make other changes in different forms on the basis of the above description, should all cover this
In the protection domain of invention.
Claims (8)
1. a kind of frequency conversion type vibrates sampling machine, including：Casing, crushing system, transmission system and screening system, PLC programmables
Controller and transformer, it is characterised in that：
The crushing system includes material cup, the coil being arranged on the outside of material cup and sealing shell, if a kind of frequency conversion type of the present invention
Sampling machine is vibrated, including：Casing, crushing system, transmission system and screening system, PLC programmable controllers and transformer, its
It is characterised by：
The crushing system includes material cup, is arranged on material cup outer coil and sealing shell, is arranged on the tubular type material hammer in material cup,
The motor of material cup bottom is arranged on, described coil is connected with transformer and PLC programmable controllers；
Described transmission system includes the bearing being arranged on the casing, and one end is fixed on the outer middle side part of sealing shell, another
The runing rest being fixedly connected with holder top is held, the belt pulley I on runing rest is fixedly mounted on bearing bottom
Motor, is provided with belt pulley II at driving motor output shaft end, belt by belt pulley I and belt pulley II by motor shaft and
Runing rest is connected；
Described screening system includes being arranged on the first screen cloth of material cup internal upper part and is arranged on the second screen cloth two of material cup bottom
Component.
2. the frequency conversion type vibration sampling machine according to claims 1, sets groove, in institute in the material cup upper inside wall
State the first screen cloth periphery and the projection being meshed with the groove is set, the first screen cloth peripheral projections screw in the material cup inwall
Groove in, pin first screen cloth, in material cup, the bottom of the first screen cloth is additionally provided with stopping means.
3. the frequency conversion type vibration sampling machine according to claims 1, the described component of the second screen cloth two by base, be arranged on
Containing box on base, four spring stacks between containing box base angle and base, installed in the of containing box internal upper part
Two screen clothes and vibration machine installed in containing box bottom are constituted.
4. the frequency conversion type vibration sampling machine according to claims 1, it is characterised in that set in the material cup upper inside wall
Groove is put, the projection being meshed with the groove is set in screen cloth periphery, the raised of the first screen cloth periphery screws in institute
In the groove for stating material cup inwall, first screen cloth is pinned, in material cup, the bottom of the first screen cloth is additionally provided with stopping means.
5. according to claims 1 frequency conversion type vibration sampling machine, it is characterised in that the described component of the second screen cloth two by
The containing box on cabinet base is arranged on, four on containing box spring stack, installed in the second of containing box internal upper part
Screen cloth and vibration machine installed in containing box bottom are constituted.
6. the frequency conversion type vibration sampling machine according to claims 3, it is characterised in that described vibration machine is two.
7. the frequency conversion type vibration sampling machine according to claims 1, it is characterised in that the mesh of the first described screen cloth is
The mesh of 60 mesh~200.
8. the frequency conversion type vibration sampling machine according to claims 1, it is characterised in that the mesh of the second described screen cloth is small
Be that the mesh mesh number of the first screen cloth plus 10 in the mesh of the first screen cloth, i.e. the mesh of 70 mesh~210.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710407798.5A CN107185628B (en) | 2017-06-02 | 2017-06-02 | Variable-frequency vibration sampling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710407798.5A CN107185628B (en) | 2017-06-02 | 2017-06-02 | Variable-frequency vibration sampling machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107185628A true CN107185628A (en) | 2017-09-22 |
| CN107185628B CN107185628B (en) | 2022-09-16 |
Family
ID=59876882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710407798.5A Expired - Fee Related CN107185628B (en) | 2017-06-02 | 2017-06-02 | Variable-frequency vibration sampling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107185628B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110586289A (en) * | 2019-09-10 | 2019-12-20 | 徐州华峰测控技术有限公司 | Sealed vibration system appearance rubbing crusher of adjustable speed |
| CN115356173A (en) * | 2022-08-11 | 2022-11-18 | 天津海关化矿金属材料检测中心 | Tunnel type field ore sampling machine and using method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB642315A (en) * | 1947-04-25 | 1950-08-30 | Kenneth Gauldie | Improvements in power transmission in jaw crushers |
| CN2349568Y (en) * | 1998-11-11 | 1999-11-17 | 张利珍 | Electromagnet vibration table type sample maker |
| CN201871402U (en) * | 2010-12-06 | 2011-06-22 | 河南富耐克超硬材料有限公司 | Milling barrel of planetary ball mill |
| CN203470096U (en) * | 2013-08-05 | 2014-03-12 | 河南富耐克超硬材料股份有限公司 | Discharge device of ball-milling pot and ball-milling pot assembly using discharge device |
| CN203750647U (en) * | 2014-03-24 | 2014-08-06 | 潘显敏 | Electromagnetic vibratory crusher |
| CN105312141A (en) * | 2015-11-21 | 2016-02-10 | 嘉善远大新型墙体有限公司 | Gangue raw material processing device for insulating brick production |
| CN205110129U (en) * | 2015-11-13 | 2016-03-30 | 河南煜鑫高科有限公司 | Tabular corundum production line multilayer vibration screening device |
| CN105521867A (en) * | 2016-02-03 | 2016-04-27 | 梁小利 | Screening integrated device for material production raw material crushing and based on ball milling principle |
| CN205269827U (en) * | 2015-11-20 | 2016-06-01 | 嘉善远大新型墙体有限公司 | Screening integrated device is smashed with raw materials to insulating brick production |
| CN205628557U (en) * | 2016-04-14 | 2016-10-12 | 山东营丰生物科技有限公司 | Fertilizer sieving mechanism |
| CN206008811U (en) * | 2016-08-26 | 2017-03-15 | 无锡市恒达矿山机械有限公司 | A kind of ore reduction screening installation |
-
2017
- 2017-06-02 CN CN201710407798.5A patent/CN107185628B/en not_active Expired - Fee Related
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB642315A (en) * | 1947-04-25 | 1950-08-30 | Kenneth Gauldie | Improvements in power transmission in jaw crushers |
| CN2349568Y (en) * | 1998-11-11 | 1999-11-17 | 张利珍 | Electromagnet vibration table type sample maker |
| CN201871402U (en) * | 2010-12-06 | 2011-06-22 | 河南富耐克超硬材料有限公司 | Milling barrel of planetary ball mill |
| CN203470096U (en) * | 2013-08-05 | 2014-03-12 | 河南富耐克超硬材料股份有限公司 | Discharge device of ball-milling pot and ball-milling pot assembly using discharge device |
| CN203750647U (en) * | 2014-03-24 | 2014-08-06 | 潘显敏 | Electromagnetic vibratory crusher |
| CN205110129U (en) * | 2015-11-13 | 2016-03-30 | 河南煜鑫高科有限公司 | Tabular corundum production line multilayer vibration screening device |
| CN205269827U (en) * | 2015-11-20 | 2016-06-01 | 嘉善远大新型墙体有限公司 | Screening integrated device is smashed with raw materials to insulating brick production |
| CN105312141A (en) * | 2015-11-21 | 2016-02-10 | 嘉善远大新型墙体有限公司 | Gangue raw material processing device for insulating brick production |
| CN105521867A (en) * | 2016-02-03 | 2016-04-27 | 梁小利 | Screening integrated device for material production raw material crushing and based on ball milling principle |
| CN205628557U (en) * | 2016-04-14 | 2016-10-12 | 山东营丰生物科技有限公司 | Fertilizer sieving mechanism |
| CN206008811U (en) * | 2016-08-26 | 2017-03-15 | 无锡市恒达矿山机械有限公司 | A kind of ore reduction screening installation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110586289A (en) * | 2019-09-10 | 2019-12-20 | 徐州华峰测控技术有限公司 | Sealed vibration system appearance rubbing crusher of adjustable speed |
| CN115356173A (en) * | 2022-08-11 | 2022-11-18 | 天津海关化矿金属材料检测中心 | Tunnel type field ore sampling machine and using method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107185628B (en) | 2022-09-16 |
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Granted publication date: 20220916 |