CN105396650A - Screen-free type intelligent nanometer grinding system - Google Patents
Screen-free type intelligent nanometer grinding system Download PDFInfo
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- CN105396650A CN105396650A CN201510608433.XA CN201510608433A CN105396650A CN 105396650 A CN105396650 A CN 105396650A CN 201510608433 A CN201510608433 A CN 201510608433A CN 105396650 A CN105396650 A CN 105396650A
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Classifications
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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
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/02—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft
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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
- 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
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Crushing And Grinding (AREA)
- Centrifugal Separators (AREA)
Abstract
The invention relates to the field of dispersing and grinding equipment, in particular to a screen-free type intelligent nanometer grinding system. The screen-free type intelligent nanometer grinding system comprises a grinding cavity and a grinding rotor. One end of a discharging hollow shaft extends into the grinding cavity; a rotary separation device is installed on the discharging hollow shaft; materials inside the grinding cavity are ground through the grinding rotor and flow to the periphery of the rotary separation device; large-particle materials and grinding beads inside the grinding cavity are thrown out of the rotary separation device under the centrifugal action of the rotary separation device, and small-particle materials overcome centrifugal force under the feeding pressure action to enter the rotary separation device, the discharging hollow shaft and a subsidence and filter transfer container. The structure of an existing screen type separation device is completely abandoned, strong centrifugal force generated when the separation device rotates throws grinding media outwards namely the grinding beads and the large-particle materials, and the small-particle materials overcome centrifugal force under the feeding pressure action to enter the discharging hollow shaft and the subsidence and filter transfer container from a vortex groove, and therefore products with smaller particles are obtained.
Description
Technical field
The present invention relates to advanced material and wet method nanometer technology grinding time solid-liquid separation technique field, particularly a kind of adopt microsphere carry out wet method nano-milled without screen mesh type intelligent nano grinding system.
Background technology
The coal fired power generation of China, cement, powder metallurgy, petroleum gas, chemical industry, food, lithium titanate, LiFePO4, graphite is rare, nano-silicon, dyestuff, paint, ink, fire retardant, photoelectricity industry TFTLCD ﹑ Jetink ﹑ Ci Cai Liao ﹑ Bao Jian Pin ﹑ bio-pharmaceuticals and the biochemical Chan Ye ﹑ chemical fibre Chan Ye ﹑ building materials Chan Ye ﹑ metal Chan Ye ﹑ soap of Xi born of the same parents Po Sui ﹑ Yangization Wu ﹑ electricity Chan Ye ﹑ Guang electricity Chan Ye ﹑ medicine, leather, electronic ceramics, electrocondution slurry, offset ink, textile, bio-pharmaceuticals, painting printing ink, chip polishing fluid, clasmatosis, cosmetics, ink-jet ink, ceramic ink jet, metal nano material, plastic material, extraordinary nanometer aeronautical material, the powder industries such as ceramic material all have employed a large amount of separator technology.Separator is a kind of device of the separation for gas-solid system or liquid-solid body or gas-liquid system.Operation principle is tangentially introduce the rotary motion caused by air-flow, makes to have the solid particle of larger centrifugal force or drop and gets rid of and separate to outside wall surface.
But, owing to there is no correct understanding to the internal flow rule of separator, make the separator performance of China's these industries above-mentioned generally low, cause the situation of poor efficiency, high consumption.Such as, CFBB in coal-burning power plant, apply very general in coal-burning power plant of China, and in the fluidized bed jet mill of dry method in the separator of dynamic classification wheel and wet method horizontal sand mill the separator of dynamic classification wheel play critical effect.Especially the separator run under high temperature, high pressure, high rotating speed and high flow capacity, this gives the stable of separator and may run and brings great unfavorable factor.In addition, the secondary that conventional separation techniques can not solve powder at all such as to be carried under one's arms at the problem, makes separative efficiency low.The performance quality of separator has influence on the real nano particle fineness of device efficiency and product, has influence on the wearing and tearing of upstream device, dedusting and energy-conserving and environment-protective etc.Therefore, the performance promoting separator device becomes problem demanding prompt solution.Be with one's heart at China, have the whole world in view, when country 12 emphasis that continues promotes the industry developments such as new forms of energy, advanced material, ceramic ink jet, dyestuff, life science, the barrier of PHNHonor150, MORPHKDP nova nanometer sand mill breaks boundary, thoroughly break the monopolization general layout of centering state of external producer technology, fill in the technological gap of domestic ultra-large type nanometer sand mill, empirical tests is technical surmounts imported product.Nowadays this milling apparatus has been successfully applied to the industries such as new forms of energy battery (northern titanium difficult to understand, red four directions, Lishen Battery), advanced material (the precious science and technology of hat person of outstanding talent high-new, 999sunlord electronics, silicon, good must eugenic thing), ceramic ink jet (Dow technology, state's ceramic material)! .Except finding development new direction, the main policies that " high walling, extensively store up grain " Ye Shipaile company develops in adverse circumstance.The research and development that Lei.iMOSmartgM3000 rises nonferrous metals ore ultra-large type capacity sand mill " thunder intelligence easily mill " are sold, the critical corner of next three years enterprise turnover will be become, this product will make the rate of recovery of the nonferrous metals ores such as gold, platinum, copper mine improve tens points, and this kind of technology, equipment are forbidden to Chinese exports by Germany, Japan, Australia's monopolization at present.If next three years can sell tens, commercial mistake hundred million has been minimum target.Open Chinese intelligence and easily grind novel concept.Company breaks through from marketing model, breaks unit and sells thinking, make global nano-milled technology overall work station solution integration supplier.
Summary of the invention
For above-mentioned technical problem, the object of the present invention is to provide a kind of separative efficiency high, stable and can with less abrasive media without screen mesh type intelligent nano grinding system.
The present invention solves the problems of the technologies described above adopted technical scheme: without screen mesh type intelligent nano grinding system, comprise horizontally disposed grinding chamber and be arranged on the grinding rotor in grinding chamber, grinding chamber is stretched in one discharging hollow shaft one end rotated, described discharging hollow shaft is provided with and drives by it rotating separation device rotated, material in grinding chamber is by flowing to rotating separation device outside after grinding rotor and abrasive media impacting, under the centrifugal action of rotating separation device, the material of abrasive media and the larger particles after grinding gets rid of to outside rotating separation device, after grinding, more short grained material overcomes centrifugal force and enters rotating separation device under feed pressure effect, discharging hollow shaft is flowed into again from rotating separation device, then flowed into by swivel joint in the sedimentation filtration transfer container vertically arranged, finally manage by the material ratio restitution of hydrodynamics, from the finished product slurry products that this sedimentation filtration transfer container collection overflows.
As preferably, a main shaft rotated stretches into the grinding chamber other end, and described grinding rotor is arranged on this main shaft, and is driven by this main shaft and rotate.
As preferably, described grinding rotor is the mill on several interval is arranged on main shaft described main shaft, the end of described main shaft dip section is provided with dynamic classification wheel sleeve rotor DCA(DynamicClassifierAccelerator), described rotating separation device device stretches in this grading wheel sleeve rotor.
As preferably, described grinding rotor is that multichannel dynamic classification takes turns hollow grinding rotor, and this grinding rotor main body perisporium is provided with several energy saving high strength rod pin, and described rotating separation device stretches in this hollow grinding rotor.
As preferably, described rotating separation device comprises separation cylinder, column body is formed with cavity, this cylinder axis is to closed at both ends, described discharging hollow shaft axially inserts the cavity of cylinder, the inner space of this cavity and discharging hollow shaft, inwardly offers whirlpool groove from cylinder outer wall, the cavity connects of this whirlpool groove and described cylinder.
As preferably, the projection of described whirlpool groove on sagittal plane in the shape of a spiral.
As preferably, described cylinder side is provided with one and is set in end cap in described hollow discharging hollow shaft, and this end cap perisporium is being extended with flange near cylinder side, and this flange is tightly placed in cylinder periphery wall.
As preferably, described discharging hollow shaft is connected with conveying pipeline by swivel joint, and this conveying pipeline inserts in this container from described sedimentation filtration transfer container head.
As preferably, described sedimentation filtration transfer upper vessel portion sidewall offers products export, and bottom also has discharge gate and Butterworth Hatch etc.
As preferably, described sedimentation filtration transfer container bottom is provided with control valve, for pressure release and discharge abrasive media.
As can be known from the above technical solutions, the grinding system that the present invention adopts has abandoned the structure of existing screen mesh type separator completely, separator produces powerful centrifugal force and the material that abrasive media grinds pearl and larger particles is outwards thrown gets rid of when High Rotation Speed, thickness material is separated with abrasive media, avoids mill pearl to enter discharging hollow shaft from whirlpool groove; And the tiny material meeting granularity requirements overcomes centrifugal force from whirlpool groove under feed pressure effect enters discharging hollow shaft, realize first separation; From discharging hollow shaft flow out more short grained mass transport to vertical sedimentation filtration transfer container, in sedimentation filtration transfer container infall process, by proportion principle and the Separation of Solid and Liquid principle of hydrodynamics, namely abrasive media grinds pearl due to than great and be deposited in transfer container bottom for solid particle, and more short grained liquid slurry is from overflow stream in transfer container to the products export on this container side wall top, realize secondary separation, thus obtain more short grained liquid slurry product.This grinding system not only achieves high yield, and in the precision of cut point, maintain remarkable performance.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of preferred embodiment of the present invention.
Fig. 2 is the structural representation of the another kind of preferred embodiment of the present invention.
Fig. 3 is the schematic diagram of rotating separation device in the present invention.
Fig. 4 is A-A sectional view in Fig. 3.
Detailed description of the invention
Accompanying drawing is introduced of the present invention without screen mesh type intelligent nano grinding system (PHNHonor) in detail below, it grinding rotor 2 comprising horizontally disposed grinding chamber 1 and be arranged in grinding chamber, grinding chamber is stretched in one discharging hollow shaft 3 one end rotated, described discharging hollow shaft is provided with and drives by it rotating separation device 4 rotated, material in grinding chamber is by flowing to rotating separation device outside after grinding rotor and abrasive media impacting, under the centrifugal action of rotating separation device, the material of abrasive media and the larger particles after grinding gets rid of to outside rotating separation device, after grinding, more short grained material overcomes centrifugal force and enters rotating separation device under feed pressure effect, discharging hollow shaft is flowed into again from rotating separation device, then flowed into by double mechanical seal formula swivel joint 5 in the sedimentation filtration transfer container 6 vertically arranged, finally by the material strategy proportion principle of hydrodynamics, from the finished product slurry products that this sedimentation filtration transfer container collection overflows.Visible, the present invention realizes first separation by rotating separation device, then carries out secondary separation by sedimentation filtration transfer container, can obtain more short grained product.
In the present invention, a main shaft 7 rotated stretches into the grinding chamber other end, and described grinding rotor is arranged on this main shaft, and drive rotation by this main shaft, this separator and grinding rotor are distributed in the design at the two ends of grinding chamber, make material stroke in grinding chamber longer, fully to grind.
As a kind of preferred embodiment, as shown in Figure 1, grinding rotor can be several interval and is arranged on described mill on main shaft, mill is grinding element, can be the turbine rotor accelerator adopting DSE-Accelerator design element, the rational grinding chamber eccentric disc type design of mill, it is the result of lot of experimental data, and by the arrangement of certain hydrodynamics order, make whole grinding cavity radial force, large area eccentric disc produces high-density milling energy, and abrasive media produces uniform energy balance on material.The version of grinding element can be multiple, as three eccentricity shape, the turbine disk, ellipse or circular etc.; At the end of described main shaft dip section, dynamic classification wheel sleeve rotor DCA(DynamicClassifierAccelerator is installed) 21, described rotating separation device stretches in this grading wheel sleeve rotor, realizes disc type grinding.
As another kind of preferred embodiment, as shown in Figure 2, grinding transfers the multichannel dynamic classification be arranged in grinding chamber to and takes turns hollow grinding rotor, this rotor subject perisporium designs several Zeta-ECM(Zeta-EConoMize) energy saving high strength rod pin, described rotating separation device stretches in the hollow grinding rotor of this excellent pin, realizes the grinding of excellent pin; Greatly can improve the applicability of this grinding system like this.
As shown in Figure 3, Figure 4, rotating separation device 4 of the present invention comprises the separation cylinder 41 be arranged in grading wheel sleeve rotor or the hollow grinding rotor of excellent pin, column body is formed with cavity 411, cylinder axis is to closed at both ends, discharging hollow shaft 42 axially inserts described cavity, and this cavity is communicated with the inner chamber 421 of discharging hollow shaft; Cavity is by being arranged on the inner space of several discharge openings in discharging hollow shaft 422 and discharging hollow shaft; A whirlpool groove 412 is inwardly offered, this whirlpool groove and described cavity connects from cylinder outer wall.When material in the milling zone of grinding chamber through abrasive media grinding after, Disengagement zone is gathered under the effect of grinding cavity pressure, the material of Disengagement zone enters the cavity of cylinder from whirlpool groove, then discharging hollow shaft inner chamber is entered from cavity by discharge opening, thus realize the discharging of Dynamic Separation axle, improve separative efficiency and product quality.In the course of the work, discharging hollow shaft is under the driving of drive unit, drive splitter body high-speed rotation, from small to large, the less liquid slurry being positioned at inner side overcomes centrifugal force and flows into discharging hollow shaft from cavity the liquid slurry particle distributed from inside to outside around separation cylinder.
Separator of the present invention can use smaller abrasive media, not by the impact of grinding pearl pearl footpath and filter screen gap length, can reach the object that discharging flow is large, production efficiency is high; Therefore, the abrasive media of the minor diameter eliminated after adopting this separator device can again fully use traditional sand mill to use, avoids unnecessary waste, reaches the object of energy-conserving and environment-protective.In the present invention, the projection of described whirlpool groove on sagittal plane in the shape of a spiral or horn mouth form, can reduce separating energy consumption like this; This conveying pipeline is with installing flow control valve, the controlled flow making material; Conveying pipeline inserts in this container from described sedimentation filtration transfer container head.Specifically, spiral helicine whirlpool groove makes material not have pulsating nature in the groove of whirlpool, and is separated continuous, steady; Meanwhile, the whirlpool groove of rotation forms whirlpool whirlpool formula, can produce powerful centrifugal force, mill pearl and more coarse grained material outwards be thrown and gets rid of and can not enter whirlpool groove.In implementation process, the whirlpool groove hand of spiral should be consistent with cylinder direction of rotation, and such guarantee separative efficiency, reaches energy-conservation object.Under the effect of dynamic centrifugal, discharging of the present invention is unblocked, prevent sticky material be trapped in grinding in cavity for a long time and occur the problems such as overtemperature, variable color, emulsification, the present invention especially to the grinding of thermo-sensitive material, nanometer materials, flaky powder material, needle-like powder body material and dispersion effect better.
In implementation process, the length that whirlpool groove extends at axial direction is with equal in the length of axial direction with described cavity, and groove axially extended length in whirlpool is long as far as possible, and this can make most axial directions of cylinder all have gap, to accelerate discharging speed; Wherein, whirlpool groove circumferential width can be determined according to the quality requirement of product and rotational velocity range, and the design of whirlpool groove helix length can according to designs such as the mechanical property of fluid, separative efficiencies.Two halves cylinder is comprised at the cylinder 41 of separator of the present invention, can be with bolts between two and half cylinders, also can adopt clamping or other connected mode; Two halves cylinder sides adjacent all offers half whirlpool groove, and two halves whirlpool groove forms described whirlpool groove; That is whirlpool groove can be divided into symmetrical two halves, each half cylinder is arranged half whirlpool groove, but two halves cylinder side is all closed dorsad, prevent the material in cavity from flowing back to grinding drum.Cylinder of the present invention adopts split-type structural, not only facilitates installing/dismounting, and convenience is cleaned, maintenance.In implementation process, the side dorsad of half cylinder offers stepped hole 413 vertically, the side dorsad of second half cylinder offers through hole 414 vertically, described discharging hollow shaft is successively through through hole, cavity, its end is resisted against on the step surface of described stepped hole, improves the installation capability of discharging hollow shaft and cylinder like this; End-enclosed described in discharging hollow shaft, hammers into the screw 43 of stepped hole by fastening for the side dorsad of this end and described half cylinder; Make transmission more steady.Be provided with one in the side dorsad of second half cylinder described and be set in end cap 44 in described discharging hollow shaft, this end cap perisporium is being extended with flange 441 near cylinder side, this flange is tightly placed in the periphery wall of the side dorsad of second half cylinder described, the side of end cap is pushed against the end face of cylinder simultaneously, so not only make cylinder, end cap, discharging hollow shaft connects more firm, and cylinder cavity is sealed more; Hollowly described in implementation process drive described end cap and cylinder to rotate by key 45, ensure that the transmission of two and half cylinders balances more, steadily.Cylinder of the present invention, end cap, gland etc. can adopt ceramic material to make, and processing aspect, technique are simple.
In implementation process, discharging hollow shaft 3 is connected with conveying pipeline 8 by swivel joint 5, and conveying pipeline inserts in sedimentation filtration transfer container from sedimentation filtration transfer container 6 top, and material is flowed from top to bottom; In sedimentation filtration transfer container, due to the effect of gravity, at the bottom of oarse-grained material is deposited in barrel, more short grained material then floats over sedimentation filtration transfer upper vessel portion, and can flow out from the products export 61 of upper portion side wall, thus realizes secondary separation.When adopting native system grinding, as when starting shooting, material and the mill pearl of part larger particles enter discharging hollow shaft by the whirlpool groove of rotating separation device, then the material of larger particles or mill pearl can be deposited in bottom through sedimentation filtration transfer container, can not affect the quality of product.The present invention also installs control valve 62 in sedimentation filtration transfer container bottom, and the material and mill pearl that are deposited in the larger particles of bottom can be discharged, convenient next time uses.
Above-mentioned embodiment is used for illustrative purposes only, and be not limitation of the present invention, the those of ordinary skill of relevant technical field, without departing from the spirit and scope of the present invention, can also make various change and modification, therefore all equivalent technical schemes also should belong to category of the present invention.
Claims (10)
1. without screen mesh type intelligent nano grinding system, comprise horizontally disposed grinding chamber and be arranged on the grinding rotor in grinding chamber, grinding chamber is stretched in one discharging hollow shaft one end rotated, it is characterized in that: described discharging hollow shaft is provided with and drives by it rotating separation device rotated, material in grinding chamber is by flowing to rotating separation device outside after grinding rotor and abrasive media impacting, under the centrifugal action of rotating separation device, the material of abrasive media and the larger particles after grinding gets rid of to outside rotating separation device, more short grained material after grinding overcomes centrifugal force and enters rotating separation device under feed pressure effect, discharging hollow shaft is flowed into again from rotating separation device, then flowed into by swivel joint in the sedimentation filtration transfer container vertically arranged, finally from the finished product slurry products that this sedimentation filtration transfer container collection overflows.
2. according to claim 1 without screen mesh type intelligent nano grinding system, it is characterized in that: a main shaft rotated stretches into the grinding chamber other end, and described grinding rotor is arranged on this main shaft, and drives rotation by this main shaft.
3. according to claim 2 without screen mesh type intelligent nano grinding system, it is characterized in that: described grinding rotor is the mill that several interval is arranged on main shaft, be provided with grading wheel sleeve rotor at the end of described main shaft dip section, described rotating separation device stretches in this grading wheel sleeve rotor.
4. according to claim 2 without screen mesh type intelligent nano grinding system, it is characterized in that: described grinding rotor is that multichannel dynamic classification takes turns hollow grinding rotor, this grinding rotor main body perisporium is provided with several energy saving high strength rod pin, and described rotating separation device stretches in this hollow grinding rotor.
5. according in Claims 1-4 described in any one without screen mesh type intelligent nano grinding system, it is characterized in that: described rotating separation device comprises separation cylinder, column body is formed with cavity, this cylinder axis is to closed at both ends, described discharging hollow shaft axially inserts the cavity of cylinder, the inner space of this cavity and discharging hollow shaft, inwardly offers whirlpool groove from cylinder outer wall, the cavity connects of this whirlpool groove and described cylinder.
6. according to claim 5 without screen mesh type intelligent nano grinding system, it is characterized in that: the projection of described whirlpool groove on sagittal plane in the shape of a spiral.
7. according to claim 5 without screen mesh type intelligent nano grinding system, it is characterized in that: described cylinder side is provided with one and is set in end cap in described discharging hollow shaft, this end cap perisporium is being extended with flange near cylinder side, and this flange is tightly placed in cylinder periphery wall.
8. according to claim 1 without screen mesh type intelligent nano grinding system, it is characterized in that: described discharging hollow shaft is connected with conveying pipeline by double mechanical seal formula swivel joint, this conveying pipeline inserts in this container from described sedimentation filtration transfer container head.
9. according to claim 8 without screen mesh type intelligent nano grinding system, it is characterized in that: described sedimentation filtration transfer container side wall offers products export.
10. according to claim 9 without screen mesh type intelligent nano grinding system, it is characterized in that: described sedimentation filtration transfer container bottom is provided with control valve.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510608433.XA CN105396650A (en) | 2015-09-22 | 2015-09-22 | Screen-free type intelligent nanometer grinding system |
| PCT/CN2016/085436 WO2017049964A1 (en) | 2015-09-22 | 2016-06-12 | Screen-free intelligent nano-grinding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510608433.XA CN105396650A (en) | 2015-09-22 | 2015-09-22 | Screen-free type intelligent nanometer grinding system |
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| Publication Number | Publication Date |
|---|---|
| CN105396650A true CN105396650A (en) | 2016-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510608433.XA Pending CN105396650A (en) | 2015-09-22 | 2015-09-22 | Screen-free type intelligent nanometer grinding system |
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|---|---|
| CN (1) | CN105396650A (en) |
| WO (1) | WO2017049964A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017049964A1 (en) * | 2015-09-22 | 2017-03-30 | 广东派勒智能纳米科技股份有限公司 | Screen-free intelligent nano-grinding system |
| CN107824321A (en) * | 2017-12-08 | 2018-03-23 | 韶关市超微磨机设备有限公司 | A kind of liquid clasfficiator for colloid mill |
| CN108283970A (en) * | 2018-03-30 | 2018-07-17 | 同济大学 | A kind of centrifugal separating device and ball mill |
| CN110124805A (en) * | 2019-05-23 | 2019-08-16 | 长沙西丽纳米研磨科技有限公司 | A kind of grinder separator and grinder |
| CN110193408A (en) * | 2019-05-21 | 2019-09-03 | 东莞市琅菱机械有限公司 | Vertical centrifugal separation ejection of compact grinding system |
| CN111536240A (en) * | 2020-06-08 | 2020-08-14 | 山东慧敏科技开发有限公司 | Sand mill rotary joint for isolating material from contact with sealing ring and application thereof |
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| WO2017049964A1 (en) | 2017-03-30 |
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Address after: 511495 Guangzhou, Panyu District, Zhong Cun street, the source of the road on the 1st Applicant after: PUHLER (GUANGZHOU) MACHINERY AND EQUIPMENT CO., LTD. Address before: Four 510000 Guangdong village Shek Pik cliff street Panyu District city of Guangzhou province Xie Shi Road No. 88 Applicant before: Puhler Guangzhou Machinery and Equipment Co., Ltd. |
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Application publication date: 20160316 |