CN209205439U - A kind of pressing device for ball mill grinding jar - Google Patents
A kind of pressing device for ball mill grinding jar Download PDFInfo
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- CN209205439U CN209205439U CN201821769863.5U CN201821769863U CN209205439U CN 209205439 U CN209205439 U CN 209205439U CN 201821769863 U CN201821769863 U CN 201821769863U CN 209205439 U CN209205439 U CN 209205439U
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- nut
- grinding jar
- opening
- closing plate
- screw rod
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Abstract
The utility model discloses a kind of pressing devices for ball mill grinding jar, including grinding jar, grinding jar transmission shaft, grinding jar baffle, screw rod, bottom plate, cover board, crossbeam, opening-closing plate, it the α nut and β nut of longitudinal sectional split type structure and holds down assembly, grinding jar is located in the chamber that grinding jar baffle and grinding jar transmission shaft are constituted, screw rod sequentially passes through cover board from outside to inside, opening-closing plate, nut and bottom plate are simultaneously connect with holding down assembly, grinding jar can effectively be compressed by rotating screw rod by holding down assembly, bottom plate, cover board and crossbeam constitute the hole with step, opening-closing plate is placed on stepped hole, and it is close to above the α nut and β nut of longitudinal sectional split type structure, and the α nut and β nut of longitudinal sectional split type structure being placed on bottom plate of being opened and closed of free shift.The α nut and β nut of longitudinal sectional split type structure are used in the utility model, so that holding down assembly on screw rod quickly can effectively be compressed close to grinding jar, have the characteristics that swift to operate, compression is reliable and structure is simple.
Description
Technical field
The present invention relates to ball mill transmission technical field more particularly to a kind of pressing devices for ball mill grinding jar.
Background technique
In the prior art, mineral are processed, and are mixed in ceramic process and powder metallurgy for powder, levigate, sample preparation,
Mainly using ball-milling method, principle is the impact by ball mill to material for nano material processing and material solid state alloying
It is crushed with abrasive action, this processing method simple process, required equipment is few, planetary ball mill institutes all at present
Grinding jar pressing device is that screw rod rotatably compresses structure, and when loading and unloading ball grinder, screw rod is required to revolve this compressing structure
Few ten multi-turns or even tens circles are gone to, the plenty of time of operator is not only wasted, keeps its working efficiency low, and should
Clamping mode reliability is not high.Therefore this compressing structure generally increases a fastening screw nut, when the grinding jar of handling ball mill
When, need also to rotate the fastening screw nut several circles or tens circles.This compressing structure is there is also some potential safety problems simultaneously,
If press it is too heavy if may be damaged ball grinder；If press it is too loose if may due to grinding jar high speed rotation and revolution and its just
The reasons such as reversion and vibration, cause the loosening of grinding jar, so that the safety accident of possible occurrence of equipment.
In consideration of it, R & D design goes out a kind of for easy to operate in ball mill grinding jar, safe and reliable pressing device is compressed
Tool has very important significance.
Summary of the invention
In view of the deficiencies in the prior art, the present invention provides a kind of easy to operate, compress securely and reliably and
Structure is simply to the pressing device of ball mill grinding jar.
In order to solve the above-mentioned technical problem, the present invention takes following technical scheme, provides a kind of for ball mill grinding jar
Pressing device, including,
Grinding jar and grinding jar transmission shaft, the grinding jar two sides are equipped with grinding jar baffle, and the grinding jar transmission shaft is located at the grinding jar
Bottom is simultaneously connect with the grinding jar baffle of two sides；
Bottom plate, cover board and Duo Gen crossbeam, the cover board are fixed on the crossbeam, and the more crossbeams are evenly arranged in institute
The surrounding of bottom plate is stated, and the more one end of the beam are connect with the bottom plate, the other end is connect with the grinding jar baffle, more institutes
It states crossbeam and constitutes the hole with step in clamping on the bottom plate；
Nut and opening-closing plate with curved notch, the opening-closing plate are rotatably set to the more crossbeams in the bottom
On the step in the hole constituted on plate, and it is close to the cover board inside, the nut is located on the bottom plate, and opens with described
Plywood is close to, and the nut is longitudinal sectional split type structure, including α nut and β nut, solid on the α nut and the β nut
It is sold equipped with folding, the folding pin can slide in the curved notch of the opening-closing plate keeps the α nut and the β nut opposite
Or reverse motions form folding, the opening-closing plate is equipped with the first control piece for controlling the opening-closing plate rotation and opens with described
Dowel pin cooperation is for the self-locking structure that the folding pin is fixed；
Hold down assembly and screw rod, the screw rod sequentially pass through from outside to inside the cover board, the opening-closing plate, the nut and
The bottom plate is simultaneously connect with described hold down assembly, and described hold down assembly is close to or by rotating the screw rod far from the grinding jar.
It is described to hold down assembly including briquetting with hole, axis card and hole card, the hole as the preferred embodiment of above scheme
It is arranged in the hole of the briquetting, the axis card is arranged on the screw rod, and the screw rod passes through the axis card and the hole
Card is connect with the briquetting.
As the preferred embodiment of above scheme, tetrafluoro cushion block, the phenyl tetrafluoride pad are equipped between the briquetting and the grinding jar
Block is detachably connected with the briquetting.
As the preferred embodiment of above scheme, the first butterfly spring, first butterfly are equipped between the briquetting and the screw rod
Spring is between the axis card and the axis card.
As the preferred embodiment of above scheme, the screw rod is equipped with the second control piece for controlling the screw rod rotation,
Second control piece can be handle, handwheel or goat's horn nut.
As the preferred embodiment of above scheme, positioning bead is additionally provided on the nut, the positioning bead includes spring and steel
Pearl, the opening-closing plate be equipped with the matched location dimples of the steel ball, when the nut closure when, the steel ball is by the bullet
Spring is pressed into the location dimples and limits to the nut.
As the preferred embodiment of above scheme, it is equipped between the opening-closing plate and the cover board to by the opening-closing plate pressure
Tightly the second butterfly spring on crossbeam step cutting pattern hole.
As the preferred embodiment of above scheme, first control piece can be handle, handwheel or goat's horn nut.
As the preferred embodiment of above scheme, the self-locking structure includes the curved groove of the folding pin and the opening-closing plate
Mouthful, the curve lift angle of two endpoint locations of curve notch of the opening-closing plate is set as zero, in nut folding, the folding
Pin can carry out self-locking in two endpoint locations that curve lift angle is zero.
As the preferred embodiment of above scheme, the self-locking structure includes the curved groove of the folding pin and the opening-closing plate
Mouthful, the curve notch of the opening-closing plate is equipped with one section of circular arc concentric with the step cutting pattern hole.
Compared with the prior art, the present invention has following technical advantage:
(1) the α nut and β nut that longitudinal sectional split type structure is used in the present invention, so that the institute being connect with the screw rod
State hold down assembly can quickly close to or far from the grinding jar, while only need to the screw rod rotate one circle left and right, can be realized
The grinding jar is effectively compressed and unclamped, has the characteristics that easy to operate, compression is safe and reliable and structure is simple；
(2) self-locking structure is provided in the present invention on the opening-closing plate curve notch, so that the nut is in ball mill
In operation process, can be stable rest on is opened and closed on position；
(3) it is provided with the second butterfly spring between heretofore described opening-closing plate and the cover board, is added by second butterfly spring
Frictional force when big opening-closing plate rotation between the crossbeam, effectively prevents the pine of the opening-closing plate and the nut
It is dynamic；
(4) positioning bead is used between heretofore described nut and the opening-closing plate, ensure that the opening-closing plate
It is reliable with the positioning of the nut；
(5) it is respectively provided between the screw rod and the briquetting, between the briquetting and the grinding jar in the present invention
Flexible first butterfly spring and tetrafluoro cushion block, so that with certain elasticity when the pressing device compresses the grinding jar, more
Add securely and reliably, while also ensuring and being unlikely to overexert and be subject to crushing when the grinding jar is compacted.
Detailed description of the invention
Fig. 1 is the longitudinal sectional cross-sectional view of structure of the invention,
Fig. 2 is enlarged drawing at the A of Fig. 1,
Fig. 3 is the cross-sectional view that nut is crosscutting in the present invention,
Fig. 4 is the bottom view of Fig. 3.
In figure: 1. grinding jars, 2. hold down assembly, 24. tetrafluoro cushion blocks, 25. briquettings, 26. axis cards, 27. first butterfly springs, 28. holes
Card, 3 grinding jar transmission shafts, 4. grinding jar baffles, 9. bottom plates, 10. crossbeams, 11. first control pieces, 12. second control pieces, 13. screw rods,
14. cover board, 15. second butterfly springs, 16. opening-closing plates, 18. nuts, 181. α nuts, 182. β nuts, 17. folding pins, 19. positioning
Pearl, 191. springs, 192. steel balls.
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.
Such as Fig. 1, Fig. 2, Fig. 3, shown in Fig. 4, a kind of pressing device for ball mill grinding jar, including,
Grinding jar 1 and grinding jar transmission shaft 3,1 two sides of grinding jar are equipped with grinding jar baffle 4, and the grinding jar transmission shaft 3 is located at described
1 bottom of grinding jar is simultaneously connect with the grinding jar baffle 4 of two sides；
Bottom plate 9, cover board 14 and Duo Gen crossbeam 10, the cover board 14 are fixed on the crossbeam 10, the more crossbeams 10
It is evenly arranged in the surrounding of the bottom plate 9, and more described 10 one end of crossbeam are connect with the bottom plate 9, the other end and the mill
Tank baffle 4 connects, and the more crossbeams 10 constitute the hole with step in clamping on the bottom plate 9；
Nut 18 and opening-closing plate 16 with curved notch, the opening-closing plate 16 are rotatably set to the more crossbeams 10
In on the step in the hole constituted on the bottom plate 9, and be close on the inside of the cover board 14, the nut 18 is located at the bottom plate
On 9, and it is close to the opening-closing plate 16, the nut 18 is longitudinal sectional split type structure, including α nut 181 and β nut 182, institute
It states and is installed with folding pin 17 on α nut 181 and the β nut 182, the folding pin 17 can be in the curved of the opening-closing plate 16
Sliding makes the α nut 181 in notch and the β nut 182 is opposite or reverse motions form folding, sets on the opening-closing plate 16
Have and controls the first control piece 11 that the opening-closing plate 16 rotates and cooperate with the folding pin 17 for by the folding pin 17
Fixed self-locking structure；
Hold down assembly 2 and screw rod 13, the screw rod 13 sequentially pass through from outside to inside the cover board 14, the opening-closing plate 16,
The nut 18 and the bottom plate 9 and with 2 connections that hold down assembly, it is described hold down assembly it is 2 tight by rotating the screw rod 13
Patch or the separate grinding jar 1.
In the present embodiment, when pressing device needs compress the grinding jar 1, due to 181 He of α nut
The β nut 182 is in far from state, and the screw rod 13 can drive described hold down assembly 2 quickly to support into the grinding jar 1, then
First control piece 11 controls the opening-closing plate 16 on the more crossbeams 10 in the platform in the hole constituted on the bottom plate
It is rotated on rank, the folding pin 17 is driven to move in the curve notch of the opening-closing plate 16, and then drive the α nut 181
It is moved toward one another with the β nut 182, realizes the closure of the nut 18, the folding pin 17 is carried out by self-locking structure at this time
Fixed limit can be realized and effectively be compressed to the grinding jar 1, while can also then to one circle of the screw rod 13 rotation
Contrary operation moves the α nut 181 and the β nut 182 towards opposite direction, realizes the opening of the nut 18, from
And it can make the screw rod 13 that the pressing device 2 be driven to be rapidly directed away from the grinding jar 1.The present embodiment uses longitudinal sectional split type structure
The α nut 181 and the β nut 182 realize operation that the grinding jar 1 is effectively compressed and unclamped, have and operate
Feature convenient and efficient, compression is safe and reliable and structure is simple.
As shown in Figure 1 and Figure 2, it is described hold down assembly 2 include briquetting 25 with hole, axis card 26 and hole card 28, the hole card
28 are arranged in the hole of the briquetting 25, and the axis card 26 is arranged on the screw rod 13, and the screw rod 13 passes through the axis card
26 and the hole card 28 connect with the briquetting 25.In the present embodiment, the screw rod 13 drives described hold down assembly 2 to support into described
It when grinding jar 1, is pressed on the hole card 28 by the axis card 26, so that the briquetting 25 directly carries out the grinding jar 1
It is effectively reliable to compress.
As shown in Figure 1 and Figure 2, tetrafluoro cushion block 24, the tetrafluoro cushion block 24 are equipped between the briquetting 25 and the grinding jar 1
It is embedded on the briquetting 25.In the present embodiment, when the briquetting 25 directly bears against the grinding jar 1 by the tetrafluoro cushion block 24
It, will not be to the grinding jar 1 pressing force is somewhat larger because the tetrafluoro cushion block 24 has certain compression resilience when upper
It damages.
As shown in Figure 1 and Figure 2, the first butterfly spring 27, first butterfly spring 27 are equipped between the briquetting 25 and the screw rod 13
Between the axis card 26 and the hole card 28.In the present embodiment, by being set between the briquetting 25 and the screw rod 13
First disc spring 27 is set, first butterfly spring 27 is between the axis card 26 and the hole card 28, when compressing, the spiral shell
Bar 13 is pressed in first butterfly spring 27, and first butterfly spring 27 is pressed on the briquetting 25, and the briquetting 25 is pressed in the mill
On tank 1；When the release of screw rod 13 is retracted, the screw rod 13 drives the axis card 26, and the axis card 26 drives first butterfly
Spring 27, first butterfly spring 27 drive the hole card 28, and the hole card 28 drives the release of briquetting 25 to retract.First butterfly
Spring 27 effectively prevent the grinding jar 1 to loosen between the briquetting 25 and the screw rod 13 when being clamped.
As shown in Figure 1, the screw rod 13 is equipped with the second control piece 12 rotated for controlling the screw rod 13, described second
Control piece 12 can be handle, handwheel or goat's horn nut.In the present embodiment, controlling the second control piece 12 that the screw rod 13 rotates is
Goat's horn nut rotates the screw rod 13 by the goat's horn nut to realize effective clamping to the grinding jar 1, and operation is extremely just
It is prompt.In other embodiments, second control piece 12 is also possible to handle or handwheel.
As shown in Figure 2, Figure 4 shows, positioning bead 19 is additionally provided on the nut 18, the positioning bead 19 includes spring 191 and steel
Pearl 192, the opening-closing plate 16 are equipped with and the matched location dimples of the steel ball 192, when the nut 18 closure, the steel
Pearl 192 is pressed into the location dimples by the spring 191 and limits to the nut 18.In the present embodiment, the nut
Be additionally provided with positioning bead 19 on 18, the opening-closing plate 16 be equipped with the matched location dimples of the positioning bead 19, when the α nut
181 and the β nut 182 be closed when, the positioning bead 19 match with the location dimples just, realize to the nut 8 limit
Position, to realize the folding of the nut 18 freely, and positioning is reliable when clamping.
As shown in Figure 1, being equipped between the opening-closing plate 16 and the cover board 14 opening-closing plate 16 is pressed on institute
State the second butterfly spring 15 on 10 step cutting pattern hole of crossbeam.In the present embodiment, it is equipped between the opening-closing plate 16 and the cover board 14
The opening-closing plate 16 is flexibly pressed on the cylinder step of the crossbeam 10 by second butterfly spring 15 by the second butterfly spring 15
On, the frictional force when opening-closing plate 16 rotates between the crossbeam 10 is considerably increased, to effectively prevent described open
Plywood 16 and the nut 13 loosen, and ensure that the folding of the nut 13 is reliable and stable.
As shown in Figure 1, first control piece 11 can be handle, handwheel or goat's horn nut.In the present embodiment, described first
Control piece 11 is handle, controls the rotation of opening-closing plate 16 by the handle to control the folding pin 17 in curved notch
Sliding, it is extremely convenient to operate.In other embodiments, first control piece 11 is also possible to handwheel or goat's horn nut.
As shown in figure 4, the self-locking structure includes the curve notch of the folding pin 17 and the opening-closing plate 16, it is described to open
The curve notch of plywood 16 is equipped with one section of circular arc concentric with the step cutting pattern hole.In the present embodiment, by being opened described
One section of circular arc concentric with the step cutting pattern hole is opened up on the curve notch of plywood 16, when the nut 18 is closed or is beaten entirely outside
When opening, the folding pin 17 enters real in circular arc concentric with the step cutting pattern hole on the curve notch of the opening-closing plate 16
It is existing self-locking, it ensure that in the ball mill operation process, what the nut 18 can be stable rests on not loose on folding position
It is dynamic.
As shown in figure 4, the self-locking structure includes the curve notch of the folding pin 17 and the opening-closing plate 16, it is described to open
The curve lift angle of two endpoint locations of curve notch of plywood 16 is set as zero, in the nut 13 folding, the folding pin 17
It can be carried out in two endpoint locations that curve lift angle is zero self-locking.In another embodiment, by by the song of the opening-closing plate 16
The curve lift angle of two endpoint locations of notches for wire be set as zero come realize it is described folding pin 17 it is self-locking, when the nut 18 closure or
The outer full endpoint location that when opening, the curve lift angle that the folding pin 17 enters on the curve notch of the opening-closing plate 16 is zero
It is self-locking to realize, it equally ensure that in the ball mill operation process, what the nut 18 can be stable rests on folding position
It sets and does not loosen.
It should be noted that the nut 18 has the internal screw thread to match with the screw rod 13, and described in the present invention
Nut 18 is made of the α nut 181 of longitudinal sectional split type structure and the β nut 182, the α nut 181 and the β spiral shell
Mother 182 is exactly two longitudinally slit half-nuts of the nut 18, be can be formed by when two half-nuts are closed complete
The nut 18；The nut 18 is a square nut, and the opening-closing plate 16 is a circular slab, therefore the more cross
Beam 10 is the hole with step cutting pattern in what is constituted on the bottom plate 9, and the upper end in the hole is one and the folding version 16
The step cutting pattern that shape matches, lower end are one and the matched square hole of 18 shape of nut, in other embodiments,
The hole can change with the shape of the opening-closing plate 16 and the nut 18 and be changed, but must assure that the opening-closing plate 16 can
It is rotated on the step, 18 free shift of nut realizes folding.
A kind of pressing device for ball mill grinding jar provided by the present invention is described in detail above.Herein
Apply that a specific example illustrates the principle and implementation of the invention, the explanation of above example is only intended to help
Understand core of the invention thought.It should be pointed out that for those skilled in the art, not departing from the present invention
, can be with several improvements and modifications are made to the present invention under the premise of principle, these improvement and modification also fall into right of the present invention
It is required that protection scope in.
Claims (10)
1. a kind of pressing device for ball mill grinding jar, which is characterized in that including,
Grinding jar (1) and grinding jar transmission shaft (3), grinding jar (1) two sides are equipped with grinding jar baffle (4), grinding jar transmission shaft (3) position
It is connect in the grinding jar (1) bottom and with the grinding jar baffle (4) of two sides；
Bottom plate (9), cover board (14) He Duogen crossbeam (10), the cover board (14) is fixed on the crossbeam (10), described in more
Crossbeam (10) is evenly arranged in the surrounding of the bottom plate (9), and more described crossbeam (10) one end are connect with the bottom plate (9),
The other end is connect with the grinding jar baffle (4), and one is constituted on more crossbeam (10) the Yu Suoshu bottom plates (9) has step
Hole；
Nut (18) and opening-closing plate (16) with curved notch, the opening-closing plate (16) are rotatably set to the more crossbeams
(10) on the step in the hole constituted on Yu Suoshu bottom plate (9), and it is close to the cover board (14) inside, nut (18) position
In on the bottom plate (9), and it is close to the opening-closing plate (16), the nut (18) is longitudinal sectional split type structure, including α nut
(181) and β nut (182) folding pin (17), the folding, are installed on the α nut (181) and the β nut (182)
Pin (17) sliding can keep the α nut (181) and the β nut (182) opposite in the curved notch of the opening-closing plate (16)
Or reverse motions form folding, the opening-closing plate (16) is equipped with the first control piece (11) for controlling opening-closing plate (16) rotation
And with folding pin (17) cooperation for the self-locking structure that the folding pin (17) is fixed；
It holds down assembly (2) and screw rod (13), the screw rod (13) sequentially passes through the cover board (14), the opening-closing plate from outside to inside
(16), it the nut (18) and the bottom plate (9) and is connect with hold down assembly (2), hold down assembly (2) pass through rotation
The screw rod (13) is close to or far from the grinding jar (1).
2. being used for the pressing device of ball mill grinding jar as described in claim 1, which is characterized in that described (2) packet that holds down assembly
Briquetting with hole (25), axis card (26) and hole card (28) are included, the hole card (28) is arranged in the hole of the briquetting (25), institute
It states axis card (26) to be arranged on the screw rod (13), the screw rod (13) passes through the axis card (26) and the hole card (28) and institute
State briquetting (25) connection.
3. as claimed in claim 2 be used for ball mill grinding jar pressing device, which is characterized in that the briquetting (25) with it is described
Tetrafluoro cushion block (24) are equipped between grinding jar (1), the tetrafluoro cushion block (24) is embedded on the briquetting (25).
4. as claimed in claim 3 be used for ball mill grinding jar pressing device, which is characterized in that the briquetting (25) with it is described
Be equipped with the first butterfly spring (27) between screw rod (13), first butterfly spring (27) be located at the axis card (26) and the hole card (28) it
Between.
5. being used for the pressing device of ball mill grinding jar as claimed in claim 4, which is characterized in that the screw rod (13), which is equipped with, to be used
In the second control piece (12) for controlling screw rod (13) rotation, second control piece (12) can be handle, handwheel or goat's horn
Nut.
6. being used for the pressing device of ball mill grinding jar as described in claim 1, which is characterized in that also set on the nut (18)
Have positioning bead (19), the positioning bead (19) includes spring (191) and steel ball (192), and the opening-closing plate (16) is equipped with and institute
Steel ball (192) matched location dimples are stated, when the nut (18) closure, the steel ball (192) is pressed by the spring (191)
Enter and the nut (18) is limited in the location dimples.
7. being used for the pressing device of ball mill grinding jar as claimed in claim 6, which is characterized in that the opening-closing plate (16) and institute
State the second butterfly being equipped between cover board (14) to be pressed on the opening-closing plate (16) on the crossbeam (10) step cutting pattern hole
Spring (15).
8. being used for the pressing device of ball mill grinding jar as described in claim 1, which is characterized in that first control piece (11)
It can be handle, handwheel or goat's horn nut.
9. being used for the pressing device of ball mill grinding jar as described in claim 1, which is characterized in that the self-locking structure includes institute
The curve notch of folding pin (17) and the opening-closing plate (16) is stated, two endpoint locations of curve notch of the opening-closing plate (16)
Curve lift angle is set as zero, and when the nut (18) open and close, the folding pin (17) can be in two endpoints that curve lift angle is zero
Position carries out self-locking.
10. being used for the pressing device of ball mill grinding jar as claimed in claim 7, which is characterized in that the self-locking structure includes
The curve notch of the folding pin (17) and the opening-closing plate (16), the curve notch of the opening-closing plate (16) be equipped with one section and
The concentric circular arc in the step cutting pattern hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821769863.5U CN209205439U (en) | 2018-10-30 | 2018-10-30 | A kind of pressing device for ball mill grinding jar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821769863.5U CN209205439U (en) | 2018-10-30 | 2018-10-30 | A kind of pressing device for ball mill grinding jar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209205439U true CN209205439U (en) | 2019-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821769863.5U Active CN209205439U (en) | 2018-10-30 | 2018-10-30 | A kind of pressing device for ball mill grinding jar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109201218A (en) * | 2018-10-30 | 2019-01-15 | 长沙天创粉末技术有限公司 | A kind of pressing device for ball mill grinding jar |
-
2018
- 2018-10-30 CN CN201821769863.5U patent/CN209205439U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109201218A (en) * | 2018-10-30 | 2019-01-15 | 长沙天创粉末技术有限公司 | A kind of pressing device for ball mill grinding jar |
| CN109201218B (en) * | 2018-10-30 | 2024-03-19 | 长沙天创粉末技术有限公司 | Pressing device for grinding tank of ball mill |
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