CN110090686A - A kind of high purity quartz ore processing crushing device - Google Patents
A kind of high purity quartz ore processing crushing device Download PDFInfo
- Publication number
- CN110090686A CN110090686A CN201910522176.6A CN201910522176A CN110090686A CN 110090686 A CN110090686 A CN 110090686A CN 201910522176 A CN201910522176 A CN 201910522176A CN 110090686 A CN110090686 A CN 110090686A
- Authority
- CN
- China
- Prior art keywords
- breaker roll
- plate
- shell
- shaft
- connecting plate
- 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.)
- Pending
Links
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
- 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
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
- B02C4/08—Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/30—Shape or construction of rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/42—Driving mechanisms; Roller speed control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- 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
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
- B02C2023/165—Screen denying egress of oversize material
Abstract
The invention discloses a kind of high purity quartz ore processing crushing devices, including shell, breaker roll A and breaker roll B, the housing exterior walls side is provided with support plate A, the housing exterior walls other side is provided with support plate B, the upper surface the support plate A is provided with driving motor A, the upper surface the support plate B is provided with driving motor B, the output shaft of the driving motor A passes through the bearing on shell and is connect by shaft coupling with shaft B, the both ends the breaker roll B are provided with shaft B, the shaft B of the one end the breaker roll B passes through the bearing on shell, the both ends the breaker roll A are provided with shaft A, the shaft A of the one end the breaker roll A passes through the bearing on shell.The present invention carries out sifting sort after can crushing to quartz mine, the quartz mine not crushed completely can guarantee that the crushing of quartz mine is uniform to crush again after categorised collection by a series of setting of structures.
Description
Technical field
The present invention relates to quartz mine technical field of processing equipment, the broken dress of specifically a kind of high purity quartz ore processing
It sets.
Background technique
Quartz mine is the primary raw material of ferrosilicon factory, silicon metal factory, for producing the ferroalloys raw material such as ferrosilicon, silicomanganese, and
Glass factory produces the primary raw material of glass, and dosage is huge.Quartz sand is quartz through the broken quartz particles being process.Quartz
Stone is a kind of nonmetallic mineral, is a kind of hard, wear-resisting, stable chemical performance silicate mineral, and the color of quartz sand is
Milky or semi-transparent clear shape, Mohs' hardness 7.
Quartz mine carries out broken processing in production process after mining, but existing quartz mine crushing device exists
Exist when broken and be crushed non-uniform problem, therefore, it is necessary to carry out certain improvement.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of high purity quartz ore processing
With crushing device, to solve existing technical problem.
Technical solution: to achieve the above object, the invention provides the following technical scheme: a kind of high purity quartz ore processing is used
Crushing device, including shell, breaker roll A and breaker roll B, the housing exterior walls side are provided with support plate A, the housing exterior walls
The other side is provided with support plate B, and the upper surface the support plate A is provided with driving motor A, and the upper surface the support plate B is provided with
The output shaft of driving motor B, the driving motor A pass through the bearing on shell and are connect by shaft coupling with shaft B, described broken
The both ends roller B are provided with shaft B, and the shaft B of the one end the breaker roll B passes through the bearing on shell, and the both ends the breaker roll A are equal
It is provided with shaft A, the shaft A of the one end the breaker roll A passes through the bearing on shell, and the shaft A of the breaker roll A other end is logical
Cross the output axis connection of shaft coupling Yu driving motor B, the inner walls two sides are provided with connecting plate B, on the connecting plate B
Surface is provided with elastic spring, and the elastic spring other end is provided with connecting plate A, and the upper surface connecting plate B two sides are all provided with
It is equipped with limit plate B, the lower surface connecting plate A two sides are provided with limit plate A, and the upper surface the connecting plate A is provided with U-shaped card
Plate, sieve plate is provided on the U-shaped card plate, and U-shaped card plate upper surface is provided with vibrator, the inner walls bottom setting
There is splicing bucket, the inner walls side is provided with discharge nozzle, is provided with feed hopper at the top of the inner walls.
Preferably, the connecting plate A is connected by the gap limit plate B of the upper surface limit plate A and connecting plate B of lower surface
It connects.
Preferably, the sieve plate both ends pass through the U-type groove on U-shaped card plate and connect with U-shaped card sheet separation, on the sieve plate
It is provided with filter hole.
Preferably, crushing teeth, the crushing teeth on the breaker roll A are provided on the breaker roll A and breaker roll B outer wall
It is connect with the broken tooth engagement on breaker roll B.
Preferably, the upper surface the connecting plate B is provided with guide post, and guide post is arranged on the inner wall of elastic spring,
The inner walls side is provided with baffle, and baffle is located above vibrator.
Preferably, the housing forward end face is provided with hermatic door, and the hermatic door front end face is provided with safety lock.
The utility model has the advantages that it is of the invention, it has the beneficial effect that:
1) pass through the setting of driving motor A and driving motor B, the output shaft of driving motor A passes through shaft coupling and breaker roll B
The output shaft of the shaft B connection of one end, driving motor B is connect by shaft coupling with the shaft A of the one end breaker roll A, driving motor A
Breaker roll A and breaker roll B can be driven to be rotated with driving motor B, it is broken on the crushing teeth on breaker roll A and breaker roll B
Broken tooth engagement connection, by crushing quartz mine when breaker roll A and breaker roll B.
2) it by the setting of vibrator, is fallen on sieve plate when by breaker roll A and the smashed quartz mine of breaker roll B
When, vibrator can drive the sieve plate on U-shaped card plate to be shaken, can be by different size of stone by the filter hole on sieve plate
English ore is classified, and is discharged without completely broken quartz mine by discharge nozzle, is carried out again outward after can collecting
Secondary is broken, and complete broken quartz mine is fallen in splicing bucket by the filter hole on sieve plate to be collected.The present invention
By a series of setting of structures, sifting sort is carried out after can crushing to quartz mine, the quartz mine not crushed completely can
To crush again after categorised collection, guarantee that the crushing of quartz mine is uniform.
Detailed description of the invention
Accompanying drawing 1 is the structural representation of the present invention.
Attached drawing 2 is main view of the invention.
Attached drawing 3 is part section top view of the invention.
Attached drawing 4 is enlarged structure schematic diagram at the A in Fig. 1 of the present invention.
Attached drawing 5 is the structural schematic diagram of sieve plate of the present invention.
In figure: 1, shell;2, shaft coupling;3, driving motor A;4, support plate A;5, shaft A;6, baffle;7, vibrator;8,
Sieve plate;9, splicing bucket;10, discharge nozzle;11, support plate B;12, driving motor B;13, breaker roll A;14, crushing teeth;15, it feeds
Bucket;16, safety lock;17, hermatic door;18, breaker roll B;19, shaft B;20, U-shaped card plate;21, connecting plate A;22, limit plate A;
23, limit plate B;24, connecting plate B;25, guide post;26, elastic spring;27, filter hole.
Specific embodiment
The present invention will be further explained with reference to the accompanying drawing.
As shown in attached drawing 1-5, in the embodiment of the present invention, a kind of high purity quartz ore processing crushing device, including shell
1, breaker roll A13 and breaker roll B18,1 outer wall side of shell are provided with support plate A4, and the 1 outer wall other side of shell is provided with support
The upper surface plate B11, support plate A4 is provided with driving motor A3, and the upper surface support plate B11 is provided with driving motor B12, driving electricity
The output shaft of machine A3 passes through the bearing on shell 1 and is connect by shaft coupling 2 with shaft B19, and the both ends breaker roll B18, which are provided with, to be turned
The shaft B19 of the one end axis B19, breaker roll B18 passes through the bearing on shell 1, and the both ends breaker roll A13 are provided with shaft A5, breaks
The shaft A5 of the one end broken roller A13 passes through the bearing on shell 1, and the shaft A5 of the breaker roll A13 other end passes through shaft coupling 2 and driving
The output axis connection of motor B12,1 inner wall two sides of shell are provided with connecting plate B24, and the upper surface connecting plate B24 is provided with elastic
Spring 26, elastic 26 other end of spring are provided with connecting plate A21, and the upper surface connecting plate B24 two sides are provided with limit plate B23,
The lower surface connecting plate A21 two sides are provided with limit plate A22, and the upper surface connecting plate A21 is provided with U-shaped card plate 20, U-shaped card plate 20
On be provided with sieve plate 8,20 upper surface of U-shaped card plate is provided with vibrator 7, and 1 inner wall bottom of shell is provided with splicing bucket 9, in shell 1
Wall side is provided with discharge nozzle 10, is provided with feed hopper 15, the limit plate that connecting plate A21 passes through lower surface at the top of 1 inner wall of shell
A22 is connect with the gap limit plate B23 of the upper surface connecting plate B24, can be launched quartz mine by feed hopper 15 and be entered shell
Inside body 1, by the setting of driving motor A3 and driving motor B12, the output shaft of driving motor A3 by shaft coupling 2 and is crushed
The shaft B19 connection of the one end roller B18, the output shaft of driving motor B12 pass through the shaft A5 of shaft coupling 2 and the one end breaker roll A13
Connection, driving motor A3 and driving motor B12 can drive breaker roll A13 and breaker roll B18 to be rotated, on breaker roll A13
Crushing teeth 14 engage connection with the crushing teeth 14 on breaker roll B18, by making quartz mine when breaker roll A13 and breaker roll B18
Stone is crushed, and by the setting of vibrator 7, is fallen to when by breaker roll A13 and the smashed quartz mine of breaker roll B18
When on sieve plate 8, vibrator 7 can drive the sieve plate 8 on U-shaped card plate 20 to be shaken, can be with by the filter hole 27 on sieve plate 8
Different size of quartz mine is classified, is discharged outward without completely broken quartz mine by discharge nozzle 10,
Again broken is carried out after can collecting, complete broken quartz mine falls to splicing by the filter hole 27 on sieve plate 8
It is collected in bucket 9,8 both ends of sieve plate pass through the U-type groove on U-shaped card plate 20 and connect with 20 gap of U-shaped card plate, set on sieve plate 8
It is equipped with filter hole 27, is provided with crushing teeth 14, the crushing teeth 14 on breaker roll A13 on breaker roll A13 and breaker roll B18 outer wall
Connection is engaged with the crushing teeth 14 on breaker roll B18, the upper surface connecting plate B24 is provided with guide post 25, and guide post 25 is arranged
On the inner wall of elastic spring 26,1 inner wall side of shell is provided with baffle 6, and baffle 6 is located above vibrator 7, before shell 1
End face is provided with hermatic door 17, and 17 front end face of hermatic door is provided with safety lock 16.
The working principle of the invention is: in use, external power supply need to be connected, can be thrown quartz mine by feed hopper 15
It puts into inside shell 1, starting driving motor A3 and driving motor B12 works, and the output shaft of driving motor A3 passes through connection
Axis device 2 is connect with the shaft B19 of the one end breaker roll B18, and the output shaft of driving motor B12 passes through shaft coupling 2 and breaker roll A13 mono-
The shaft A5 connection at end, driving motor A3 and driving motor B12 can drive breaker roll A13 and breaker roll B18 to be rotated, and break
Crushing teeth 14 on broken roller A13 engages connection with the crushing teeth 14 on breaker roll B18, when by breaker roll A13 and breaker roll B18
Crush quartz mine, starting vibrator 7 works, when by breaker roll A13 and the smashed quartz of breaker roll B18
When ore is fallen on sieve plate 8, vibrator 7 can drive the sieve plate 8 on U-shaped card plate 20 to be shaken, and pass through the mistake on sieve plate 8
Filter opening 27 can classify different size of quartz mine, outside by discharge nozzle 10 without completely broken quartz mine
It is discharged, again broken is carried out after can collecting, complete broken quartz mine falls by the filter hole 27 on sieve plate 8
It falls in splicing bucket 9 and is collected.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (6)
1. a kind of high purity quartz ore processing crushing device, including shell (1), breaker roll A (13) and breaker roll B (18),
It is characterized in that, shell (1) the outer wall side is provided with support plate A (4), and shell (1) the outer wall other side is provided with support
Plate B (11), support plate A (4) upper surface are provided with driving motor A (3), and support plate B (11) upper surface is provided with drive
Dynamic motor B (12), the output shaft of the driving motor A (3) pass through the bearing on shell (1) and pass through shaft coupling (2) and shaft B
(19) it connects, breaker roll B (18) both ends are provided with shaft B (19), the shaft B (19) of described breaker roll B (18) one end
Bearing on shell (1), breaker roll A (13) both ends are provided with shaft A (5), described breaker roll A (13) one end
Shaft A (5) passes through the bearing on shell (1), and the shaft A (5) of breaker roll A (13) other end by shaft coupling (2) and drives
The output axis connection of dynamic motor B (12), shell (1) the inner wall two sides are provided with connecting plate B (24), the connecting plate B
(24) upper surface is provided with elastic spring (26), and elastic spring (26) other end is provided with connecting plate A (21), the connection
Plate B (24) upper surface two sides are provided with limit plate B (23), and connecting plate A (21) the lower surface two sides are provided with limit plate A
(22), connecting plate A (21) upper surface is provided with U-shaped card plate (20), is provided with sieve plate (8), institute on the U-shaped card plate (20)
It states U-shaped card plate (20) upper surface to be provided with vibrator (7), shell (1) the inner wall bottom is provided with splicing bucket (9), the shell
Body (1) inner wall side is provided with discharge nozzle (10), is provided with feed hopper (15) at the top of shell (1) inner wall.
2. a kind of high purity quartz ore processing crushing device according to claim 1, which is characterized in that the connecting plate
A (21) is connect by the limit plate A (22) of lower surface with limit plate B (23) gap of connecting plate B (24) upper surface.
3. a kind of high purity quartz ore processing crushing device according to claim 1, which is characterized in that the sieve plate
(8) both ends pass through the U-type groove on U-shaped card plate (20) and connect with U-shaped card plate (20) gap, are provided on the sieve plate (8)
Filter opening (27).
4. a kind of high purity quartz ore processing crushing device according to claim 1, which is characterized in that the breaker roll
It is provided with crushing teeth (14) on A (13) and breaker roll B (18) outer wall, the crushing teeth (14) on the breaker roll A (13) and broken
Crushing teeth (14) on broken roller B (18) engages connection.
5. a kind of high purity quartz ore processing crushing device according to claim 1, which is characterized in that the connecting plate
B (24) upper surface is provided with guide post (25), and guide post (25) is arranged on the inner wall of elastic spring (26), the shell
(1) inner wall side is provided with baffle (6), and baffle (6) is located above vibrator (7).
6. a kind of high purity quartz ore processing crushing device according to claim 1, which is characterized in that the shell
(1) front end face is provided with hermatic door (17), and hermatic door (17) front end face is provided with safety lock (16).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201910522176.6A CN110090686A (en) | 2019-06-17 | 2019-06-17 | A kind of high purity quartz ore processing crushing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201910522176.6A CN110090686A (en) | 2019-06-17 | 2019-06-17 | A kind of high purity quartz ore processing crushing device |
Publications (1)
Publication Number | Publication Date |
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CN110090686A true CN110090686A (en) | 2019-08-06 |
Family
ID=67451014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN201910522176.6A Pending CN110090686A (en) | 2019-06-17 | 2019-06-17 | A kind of high purity quartz ore processing crushing device |
Country Status (1)
Country | Link |
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CN (1) | CN110090686A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111013722A (en) * | 2019-11-29 | 2020-04-17 | 盐城集力劳务服务有限公司 | Waste treatment auxiliary device for bridge construction |
CN111841747A (en) * | 2020-07-21 | 2020-10-30 | 钟涛 | Grinding device for ore dressing of reducible dust pollution |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000084424A (en) * | 1998-09-14 | 2000-03-28 | Shinx Ltd | Apparatus for pulverizing waste gypsum board |
CN106238132A (en) * | 2016-08-26 | 2016-12-21 | 无锡市恒达矿山机械有限公司 | A kind of ore reduction screening installation |
CN106938211A (en) * | 2017-05-02 | 2017-07-11 | 张志通 | A kind of efficiently high-quality ore crusher |
CN207287563U (en) * | 2017-08-24 | 2018-05-01 | 四川安宁铁钛股份有限公司 | Circulating ore pulverizer |
CN208004079U (en) * | 2018-01-26 | 2018-10-26 | 李六英 | A kind of house refuse retracting device |
CN108889420A (en) * | 2018-08-27 | 2018-11-27 | 阜阳市三原食品有限公司 | A kind of production stewed meat products crushing cleaning device |
CN208695116U (en) * | 2018-07-09 | 2019-04-05 | 福建省吉康新型建材有限公司 | A kind of crushing system in quartz sand production line |
CN208824662U (en) * | 2018-07-11 | 2019-05-07 | 郭朝松 | A kind of garbage grinding device |
-
2019
- 2019-06-17 CN CN201910522176.6A patent/CN110090686A/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000084424A (en) * | 1998-09-14 | 2000-03-28 | Shinx Ltd | Apparatus for pulverizing waste gypsum board |
CN106238132A (en) * | 2016-08-26 | 2016-12-21 | 无锡市恒达矿山机械有限公司 | A kind of ore reduction screening installation |
CN106938211A (en) * | 2017-05-02 | 2017-07-11 | 张志通 | A kind of efficiently high-quality ore crusher |
CN207287563U (en) * | 2017-08-24 | 2018-05-01 | 四川安宁铁钛股份有限公司 | Circulating ore pulverizer |
CN208004079U (en) * | 2018-01-26 | 2018-10-26 | 李六英 | A kind of house refuse retracting device |
CN208695116U (en) * | 2018-07-09 | 2019-04-05 | 福建省吉康新型建材有限公司 | A kind of crushing system in quartz sand production line |
CN208824662U (en) * | 2018-07-11 | 2019-05-07 | 郭朝松 | A kind of garbage grinding device |
CN108889420A (en) * | 2018-08-27 | 2018-11-27 | 阜阳市三原食品有限公司 | A kind of production stewed meat products crushing cleaning device |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111013722A (en) * | 2019-11-29 | 2020-04-17 | 盐城集力劳务服务有限公司 | Waste treatment auxiliary device for bridge construction |
CN111841747A (en) * | 2020-07-21 | 2020-10-30 | 钟涛 | Grinding device for ore dressing of reducible dust pollution |
CN111841747B (en) * | 2020-07-21 | 2021-10-29 | 南京科信磁业有限公司 | Grinding device for ore dressing of reducible dust pollution |
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