CN109351444A - A kind of freezing liquid nitrogen type ball mill - Google Patents
A kind of freezing liquid nitrogen type ball mill Download PDFInfo
- Publication number
- CN109351444A CN109351444A CN201811276172.6A CN201811276172A CN109351444A CN 109351444 A CN109351444 A CN 109351444A CN 201811276172 A CN201811276172 A CN 201811276172A CN 109351444 A CN109351444 A CN 109351444A
- Authority
- CN
- China
- Prior art keywords
- grinding jar
- liquid nitrogen
- ball mill
- low temperature
- freezing liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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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
- B02C19/00—Other disintegrating devices or methods
- B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
- B02C19/186—Use of cold or heat for disintegrating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/04—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container
- B02C17/08—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container with containers performing a planetary movement
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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
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/1815—Cooling or heating devices
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Crushing And Grinding (AREA)
Abstract
The present invention relates to ball mill technical fields, specifically disclose a kind of freezing liquid nitrogen type ball mill, including rack, low temperature resistant adapter and grinding jar, the rack is equipped with support base and the actuator for driving the grinding jar rotation, the grinding jar is set on the support base, described low temperature resistant adapter one end is detachably connected with the grinding jar, and the other end is connected to freezing liquid nitrogen container.The present invention will freeze liquid nitrogen container by the low temperature resistant adapter and be connected to the grinding jar, freezing liquid nitrogen container can be intermittently or lasting to grinding jar offer liquid nitrogen so as to be in a low temperature environment in the grinding jar, required granularity is crushed or be ground to after enabling the grinding jar crisp to the material jelly of the flexibles such as plastics, resin, ball mill is realized and ball milling is carried out to the material of the flexibles such as plastics, resin.
Description
Technical field
The present invention relates to ball mill technical field more particularly to a kind of freezing liquid nitrogen type ball mills.
Background technique
Currently, ball mill is crushed primarily directed to the powders such as dispersed metal, nonmetallic, Chinese herbal medicine, cosmetics, electronic product
Or grinding is equipped with ball grinder to be designed on ball mill, when turntable rotation, ball grinder is surrounding what turntable shaft revolved
Have simultaneously and carry out rotation around Pivot Point Center, form planetary motion, at this point, the abrading-ball in ball grinder is mutual in high-speed motion
Collision carries out ball milling to powder.But these can not be passed through for the material of the flexibles such as plastics, resin in some industries
Ball mill is crushed or is ground or even some materials need the environment of ultralow temperature to remove ball milling.
In consideration of it, it is necessary to study a kind of ball mill that can the material of flexible crushed or be ground is gone out, to make up
Blank of the relevant industries powder body material in this part.
Summary of the invention
The object of the present invention is to provide a kind of freezing liquid nitrogen type ball mills, solve conventional bead mill to the modeling in certain industries
The material of the flexibles such as material, resin can not ball mill crushing the problem of, compensate for relevant industries powder body material in the blank of this part.
The present invention is achieved through the following technical solutions: a kind of freezing liquid nitrogen type ball mill, including rack, low temperature resistant switching
Head and grinding jar, the rack are equipped with support base and the actuator for driving the grinding jar rotation, and the grinding jar is set to described
On support base, described low temperature resistant adapter one end is detachably connected with the grinding jar, and the other end is connected to freezing liquid nitrogen container.This hair
It is bright to be connected to freezing liquid nitrogen container with the grinding jar by the low temperature resistant adapter, it realizes interval or continues to mention to the grinding jar
For liquid nitrogen so as to be in a low temperature environment in the grinding jar, enable the grinding jar to the objects of the flexibles such as plastics, resin
It is crushed or is ground after material jelly is crisp.
As the preferred embodiment of above scheme, the low temperature resistant adapter include U-shaped outer tube, inner tube, hollow nipple,
Low temperature resistant thermal insulation set, rotary sleeve, snap ring and outside framework oil seal plate, the thermal insulation covers one end in the U-shaped outer tube, described
Thermal insulation covers the other end and is set in the nipple, and the nipple forms one by the outside framework oil seal plate and the U-shaped outer tube
A chamber, said inner tube is arranged in the thermal insulation set, and said inner tube one end is connected to by the U-shaped outer tube with liquid nitrogen container, institute
The inner tube other end is stated by being connected to the nipple, described nipple one end is connect with the grinding jar, and the nipple is another
End is embedded in the rotary sleeve, and the rotary sleeve is sheathed on the thermal insulation and puts on, the U-shaped outer tube and the rotary shaft
Rolling bearing and the tetrafluoro washer for sealing the rolling bearing are equipped between set, described rotary sleeve one end is located at described
Between rolling bearing and thermal insulation set, the rotary sleeve other end is fixed at the thermal insulation set and institute by the snap ring
State between reinforced seal plate, between the reinforced seal plate and the rotary sleeve be equipped with reinforced seal, the reinforced seal with
Low temperature pad is equipped between the rotary sleeve.
Scheme as a preferred embodiment of the above technical solution, said inner tube, thermal insulation set and the rotary sleeve are all made of super
Cryogenic material is made.
Scheme as a preferred embodiment of the above technical solution, the actuator include motor, driving shaft, driving gear, driven tooth
Wheel and bearing block, the driving shaft are set on the bearing block, and described driving shaft one end connects the grinding jar, and the driving shaft is another
One end connects the driven gear, and the motor drive terminal connects the driving gear, and the driving shaft passes through the driving tooth
Wheel and the driven gear engaged transmission, to drive the grinding jar.
Scheme as a preferred embodiment of the above technical solution, the grinding jar include grinding jar collet and for completely cutting off inside the grinding jar
The insulating layer of temperature, it is described to keep the temperature the interlayer for being placed on the grinding jar collet.
Scheme as a preferred embodiment of the above technical solution, the grinding jar are equipped with relief valve, and the relief valve is set to the mill
The inlet and outlet of tank.
Scheme as a preferred embodiment of the above technical solution, the grinding jar are removable by fast card device with the low temperature resistant adapter
Unload connection.
Scheme as a preferred embodiment of the above technical solution, the rack is equipped with quick-locking device and turnover device, described
The grinding jar is located in the rack when quick-locking device is used for ball milling, the turnover device is for the grinding jar in institute
Progress any angle overturning in rack is stated, and the turnover device is to automatically control.
Scheme as a preferred embodiment of the above technical solution is additionally provided with electric integrated self-con-tained unit, the electricity in the rack
Gas integral self-con-tained unit is used to automatically control the liquid nitrogen conveying of the low temperature resistant adapter and the ball milling of the grinding jar operates.
Scheme as a preferred embodiment of the above technical solution, the volume of the grinding jar can be 5 ~ 500L.
Compared with the prior art, the present invention has following technical advantage:
(1) heretofore described grinding jar is connected to by the low temperature resistant adapter with auto-pressurizing liquid nitrogen container, is realized material and is existed
In the grinding jar when ball milling, can interval or continue liquid nitrogen be provided into the grinding jar freeze material crisp, then pass through the grinding jar
Internal abrading-ball hits, shearing, dispersion, and then by material ball milling to required granularity, solve current ball mill industry without
The technical issues of materials of flexibles such as method ball milling plastics, resin；
(2) heretofore described low temperature resistant adapter uses super low-temperature resistant material and low temperature seal pad, effectively prevents Low Temperature Liquid
The phenomenon that nitrogen causes grinding jar to rotate locking；
(3) tank body of heretofore described grinding jar is equipped with the insulating layer of isolation internal temperature, has not only effectively completely cut off the grinding jar
Internal temperature and the extraneous hot transmitting of progress, reduce the consumption of energy, while improving the working efficiency of ball milling；
(4) heretofore described grinding jar is equipped with relief valve, quick-locking device and turnover device, and the relief valve eliminates behaviour
The operational risk of work person, the quick-locking device ensure that ball mill in mechanical milling process can stable operation, the overturning
Device makes input and output material operation more convenient.
Detailed description of the invention
Fig. 1 is present invention freezing liquid nitrogen type ball mill structural schematic diagram,
Fig. 2 is enlarged drawing at B in Fig. 1,
Fig. 3 is present invention freezing liquid nitrogen type ball milling side view,
Fig. 4 is the main view of present invention freezing liquid nitrogen type ball mill rollover states.
In figure, 1. racks, 2. low temperature resistant adapters, 21.U type outer tube, 22. inner tubes, 23. nipples, 24. thermal insulation sets, 25.
Rotary sleeve, 26. rolling bearings, 27. snap rings, 28. outside framework oil seal plates, 281. outside framework oil seals, 29. low temperature pads, 30. phenyl tetrafluoride pads
Circle, 3. grinding jars, 31. grinding jar collets, 32. insulating layers, 33. relief valves, 4. support bases, 5. actuators, 51. motors, 52. actively
Axis, 53. driving gears, 54. driven gears, 55. bearing blocks, 56. shields, 6. fast card devices, 7. quick-locking devices, 8. turn over
Rotary device, 9. electric integrated self-con-tained units.
Specific embodiment
In order that those skilled in the art will better understand the technical solution of the present invention, with reference to the accompanying drawing to the present invention
It is described in further detail.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of freezing liquid nitrogen type ball mill, including rack 1,2 and of low temperature resistant adapter
Grinding jar 3, the rack 1 are equipped with support base 4 and the actuator 5 for driving the grinding jar 3 to rotate, and the grinding jar 3 is set to institute
It states on support base 4, described low temperature resistant 2 one end of adapter is detachably connected with the grinding jar 3, and the other end and freezing liquid nitrogen container connect
It is logical.In the present embodiment, the material of flexible when ball milling, passes through the low temperature resistant adapter 2 and auto-pressurizing in the grinding jar 3
Liquid nitrogen container connection interval or can continue to provide liquid nitrogen into the grinding jar 3 so that the material of flexible is frozen crisp, then pass through
Abrading-ball inside the grinding jar 3 hits, shearing, disperses, and then material ball milling is realized ball mill pair to required granularity
The material of the flexibles such as plastics, resin carries out ball milling.
As shown in Figure 1 and Figure 2, it includes U-shaped outer tube 21, interior that the low temperature resistant adapter 2, which includes the low temperature resistant adapter 2,
Pipe 22, hollow nipple 23, low temperature resistant thermal insulation set 24, rotary sleeve 25, snap ring 27 and outside framework oil seal plate 28, the thermal insulation
24 one end are covered in the U-shaped outer tube 21, and the thermal insulation covers 24 other ends and is set in the nipple 23, the nipple 23
A chamber is formed by the outside framework oil seal plate 28 and the U-shaped outer tube 21, said inner tube 22 is arranged in the thermal insulation set 24,
And 22 one end of said inner tube is connected to by the U-shaped outer tube 21 with liquid nitrogen container, 22 other end of said inner tube with described by being inscribed
First 23 connection, described 23 one end of nipple are connect with the grinding jar 3, and 23 other end of nipple is embedded at the rotary sleeve
In 25, the rotary sleeve 25 is sheathed on the thermal insulation set 24, is equipped between the U-shaped outer tube 21 and the rotary sleeve 25
Rolling bearing 26 and tetrafluoro washer 30 for sealing the rolling bearing 26, described 25 one end of rotary sleeve is located at the rolling
Between dynamic bearing 26 and thermal insulation set 24,25 other end of rotary sleeve is fixed at the thermal insulation by the snap ring 27
Between set 24 and the reinforced seal plate 28, reinforced seal is equipped between the reinforced seal plate 28 and the rotary sleeve 25
281, low temperature pad 29 is equipped between the reinforced seal 281 and the rotary sleeve 25.In the present embodiment, the low temperature resistant switching
First 2 structure both ensure that liquid nitrogen interval or persistently be delivered in the grinding jar 3, and had been in low temperature environment in the grinding jar 3, has
To be frozen while crisp byed ball milling to the material of toughness on one side coming into full contact with liquid nitrogen, while also ensuring liquid nitrogen by described low temperature resistant turn
It is not in the phenomenon that causing 26 locking of rolling bearing when connector 2.
As shown in Fig. 2, said inner tube 22, thermal insulation set 24 and the rotary sleeve 25 are all made of ultralow adiabator production
It forms.In the present embodiment, during liquid nitrogen is delivered to the grinding jar 3 by the low temperature resistant adapter 2, liquid nitrogen only with it is described resistance to
Said inner tube 22, thermal insulation set 24 and the rotary sleeve 25 in low temperature adapter 2 directly contact, therefore it may only be necessary to will
Said inner tube 22, thermal insulation set 24 and the rotary sleeve 25 are made of ultralow adiabator, so that it may be guaranteed to the mill
When 3 interval of tank or persistently offer liquid nitrogen, is not in the phenomenon that rolling bearing 26 is because of low temperature locking, reduces component processing
Difficulty has saved processing cost.
As shown in Figure 1, the actuator 5 includes motor 51, driving shaft 52, driving gear 53, driven gear 54 and bearing
Seat 55, the driving shaft 52 are set on the bearing block 55, and described 52 one end of driving shaft connects the grinding jar 3, the driving shaft
52 other ends connect the driven gear 53, and the motor 51 drives end to connect the driving gear 52, and the driving shaft 52 is logical
The driving gear 53 and 54 engaged transmission of driven gear are crossed, to drive the grinding jar 3.In the present embodiment, the electricity
Machine 51 drives the driving gear 53, is engaged by the driving gear 53 with the driven gear 54, drives the driving shaft
52, to drive 3 positive and negative rotation of grinding jar, realize the stability and high efficiency operating of the grinding jar 3.In the present embodiment, the machine
Shield 56 is additionally provided on the outside of frame 1, the shield 56 effectively prevents the materials such as the dust of external environment, impurity to the drive
Each driving part of moving part 5 impacts, and improves the service life of each driving part.
As shown in Figure 1, the grinding jar 3 includes grinding jar collet 31 and the insulating layer for completely cutting off 3 internal temperature of grinding jar
32, the insulating layer 42 is placed in the interlayer of the grinding jar collet 41.In the present embodiment, by the insulating layer 32 by the mill
3 internal temperature of tank is completely cut off, so that the heat transmitting of 3 internal temperature of the grinding jar and external temperature weakens significantly, effectively
It ensure that inside the grinding jar 3 in low temperature or ultra low temperature state, further improve the powder material of the flexibles such as plastics, resin
Expect the grinding efficiency in the grinding jar 3.
As shown in Figure 1, the grinding jar 3 is equipped with relief valve 33, the relief valve 33 is set to the inlet and outlet of the grinding jar 3.
In the present embodiment, when to 3 interval of grinding jar or persistently offer liquid nitrogen, the pressure in the grinding jar 3 can be increasing, thus
There are security risks, and certain pressure is arranged by the relief valve 33 and carries out releasing pressure automatically, can exclude the behaviour of the ball mill
Make security risk.
As shown in Figure 1, the grinding jar 3 is detachably connected with the low temperature resistant adapter 2 by fast card device 6.This implementation
In example, the grinding jar 3 is detachably connected with the low temperature resistant adapter 2 by the fast card device 6, can quickly pass in and out modeling
The powder body material of the flexibles such as material, resin improves the working efficiency of ball mill.
As shown in Figure 3,4, the rack 1 is equipped with quick-locking device 7 and turnover device 8, the quick-locking device 7
The grinding jar 3 is located in the rack 1 when can be used for ball milling, the turnover device 8 is for the grinding jar 3 in the rack
Any angle overturning is carried out on 1, and the turnover device 8 is to automatically control.In the present embodiment, when the ball mill is in ball milling
When, the grinding jar 3 is located in the rack 1 by the quick-locking device 7 so that in the grinding jar 3 flexible material
Stable crisp and ball milling can be frozen by liquid nitrogen；When 3 input and output material of grinding jar, by automatically controlling the turnover device 8 in institute
It states and overturns the grinding jar 3 in rack 1, improve the working efficiency that operator passes in and out material.In other embodiments, described to turn over
Rotary device 8 can be to manually control.
As shown in figure 3, electric integrated self-con-tained unit 9 is additionally provided in the rack 1, the electric integrated self-con-tained unit
9 for automatically controlling the liquid nitrogen conveying of the low temperature resistant switching 2 and the ball milling operating of the grinding jar 3.In the present embodiment, pass through
The electric integrated self-con-tained unit 9 automatically controls the liquid nitrogen conveying of the low temperature resistant switching 2 and the ball milling of the grinding jar 3 is transported
Turn, improves the degree of automation of ball mill, manipulation accuracy is higher.
As shown in Figure 1, the volume of the grinding jar 3 can be 5 ~ 500L.In the present embodiment, the volume of the grinding jar 3 is set as 5 ~
500L can basically meet various user demands, applied widely.
A kind of freezing liquid nitrogen type ball mill provided by the present invention is described in detail above.Tool used herein
Principle and implementation of the present invention are described for body example, the above embodiments are only used to help understand this hair
Bright core concept.It should be pointed out that for those skilled in the art, before not departing from the principle of the invention
It puts, can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the guarantor of the claims in the present invention
It protects in range.
Claims (10)
1. a kind of freezing liquid nitrogen type ball mill, which is characterized in that including rack (1), low temperature resistant adapter (2) and grinding jar (3), institute
Rack (1) is stated equipped with support base (4) and the actuator (5) for driving the grinding jar (3) to rotate, the grinding jar (3) are set to
On the support base (4), described low temperature resistant adapter (2) one end is detachably connected with the grinding jar (3), the other end and freezing liquid
The connection of nitrogen tank.
2. freezing liquid nitrogen type ball mill as described in claim 1, which is characterized in that the low temperature resistant adapter (2) includes U-shaped
Outer tube (21), inner tube (22), hollow nipple (23), low temperature resistant thermal insulation set (24), rotary sleeve (25), snap ring (27) and
Outside framework oil seal plate (28), described thermal insulation set (24) one end are set in the U-shaped outer tube (21), and thermal insulation set (24) other end is set
In the nipple (23), the nipple (23) is formed by the outside framework oil seal plate (28) and the U-shaped outer tube (21)
One chamber, said inner tube (22) is arranged in the thermal insulation set (24), and said inner tube (22) one end passes through the U-shaped outer tube
(21) it is connected to liquid nitrogen container, said inner tube (22) other end with the nipple (23) by being connected to, the nipple (23) one
End is connect with the grinding jar (3), and nipple (23) other end is embedded in the rotary sleeve (25), the rotary sleeve
(25) it is sheathed on the thermal insulation set (24), rolling bearing is equipped between the U-shaped outer tube (21) and the rotary sleeve (25)
(26) and for the tetrafluoro washer (30) that seals the rolling bearing (26), described rotary sleeve (25) one end is located at the rolling
Between dynamic bearing (26) and the thermal insulation set (24), rotary sleeve (25) other end is fixed at by the snap ring (27)
Between the thermal insulation set (24) and the reinforced seal plate (28), the reinforced seal plate (28) and the rotary sleeve (25) it
Between be equipped with reinforced seal (281), equipped with low temperature pad (29) between the reinforced seal (281) and the rotary sleeve (25).
3. freezing liquid nitrogen type ball mill as claimed in claim 2, which is characterized in that said inner tube (22), the thermal insulation set
(24) it is all made of ultralow adiabator with the rotary sleeve (25) and is made.
4. freezing liquid nitrogen type ball mill as claimed in claim 1 or 2, which is characterized in that the actuator (5) includes motor
(51), driving shaft (52), driving gear (53), driven gear (54) and bearing block (55), the driving shaft (52) are set to described
On bearing block (55), described driving shaft (52) one end connects the grinding jar (3), driving shaft (52) other end connection it is described from
Moving gear (55), motor (51) driving end connect the driving gear (53), and the driving shaft (52) passes through the active
Gear (53) and the driven gear (54) engaged transmission, to drive the grinding jar (3).
5. freezing liquid nitrogen type ball mill as claimed in claim 4, which is characterized in that the grinding jar (3) includes grinding jar collet
(31) and the insulating layer (32) for completely cutting off the grinding jar (3) internal temperature, the insulating layer (32) are placed in the grinding jar collet
(31) in interlayer.
6. freezing liquid nitrogen type ball mill as claimed in claim 5, which is characterized in that the grinding jar (3) is equipped with relief valve
(33), the relief valve (33) is set to the inlet and outlet of the grinding jar (3).
7. freezing liquid nitrogen type ball mill as claimed in claim 6, which is characterized in that the grinding jar (3) and described low temperature resistant turn
Connector (2) is detachably connected by fast card device (6).
8. freezing liquid nitrogen type ball mill as claimed in claim 7, which is characterized in that the rack (1) is equipped with quick locking
The grinding jar (3) is located in the rack when quick-locking device (7) is used for ball milling by device (7) and turnover device (8)
(1) on, the turnover device (8) carries out any angle overturning for the grinding jar (3) on the rack (1), and described turns over
Rotary device (8) is to automatically control.
9. freezing liquid nitrogen type ball mill as claimed in claim 8, which is characterized in that be additionally provided with electrical one on the rack (1)
Body self-con-tained unit (9), the electric integrated self-con-tained unit (9) are used to automatically control the liquid of the low temperature resistant adapter (2)
The ball milling of nitrogen conveying and the grinding jar (3) operates.
10. the freezing liquid nitrogen type ball mill as described in claim 1 ~ 9, which is characterized in that the volume of the grinding jar (3) can for 5 ~
500L。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811276172.6A CN109351444B (en) | 2018-10-30 | 2018-10-30 | Freezing liquid nitrogen type ball mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811276172.6A CN109351444B (en) | 2018-10-30 | 2018-10-30 | Freezing liquid nitrogen type ball mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109351444A true CN109351444A (en) | 2019-02-19 |
| CN109351444B CN109351444B (en) | 2020-10-20 |
Family
ID=65347465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811276172.6A Active CN109351444B (en) | 2018-10-30 | 2018-10-30 | Freezing liquid nitrogen type ball mill |
Country Status (1)
| Country | Link |
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| CN (1) | CN109351444B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111495512A (en) * | 2020-04-28 | 2020-08-07 | 长沙天创粉末技术有限公司 | Vertical and horizontal all-dimensional multifunctional planetary ball mill |
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| CN108467194A (en) * | 2018-03-14 | 2018-08-31 | 长飞光纤光缆股份有限公司 | Automatic clamping device for bushing pipe in PCVD equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111495512A (en) * | 2020-04-28 | 2020-08-07 | 长沙天创粉末技术有限公司 | Vertical and horizontal all-dimensional multifunctional planetary ball mill |
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