CN107899935A - A kind of building sand two level screening plant - Google Patents
A kind of building sand two level screening plant Download PDFInfo
- Publication number
- CN107899935A CN107899935A CN201711304090.3A CN201711304090A CN107899935A CN 107899935 A CN107899935 A CN 107899935A CN 201711304090 A CN201711304090 A CN 201711304090A CN 107899935 A CN107899935 A CN 107899935A
- Authority
- CN
- China
- Prior art keywords
- level
- sieve plate
- screen box
- screening plant
- 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.)
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Classifications
-
- 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
- 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
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
-
- 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
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- 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
- B07B2201/00—Details applicable to machines for screening using sieves or gratings
- B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a kind of building sand two level screening plant, including base, screen box, damping noise reduction component, No.1 cam, No. two cams, level-one sieve plate and two level sieve plate, the damping noise reduction component that screen box is set by its bottom four corners is erected at the top of base, level horizontally slips equipped with level-one sieve plate in screen box upper lumen, level horizontally slips equipped with two level sieve plate in the middle part inner cavity of screen box, the right end of level-one sieve plate is fixedly connected with the connecting spring end on a stop sleeve, the right end of two level sieve plate is fixedly connected with the other end of connecting spring with the connecting spring end on another stop sleeve, the left end of level-one sieve plate is installed with No.1 pressing plate, the left end of two level sieve plate is installed with No. two pressing plates.The configuration of the present invention is simple, easy to use, efficient, not only good damping effect, but also effectively reduce noise good to the screening effect of building sand.
Description
Technical field
The present invention relates to a kind of screening plant, is specifically a kind of building sand two level screening plant.
Background technology
Construction refers to the production activity of engineering construction implementation phase, is the building course of all kinds of buildings, also just with
Say it is various lines on design drawing, in specified place, become process in kind.It includes basic engineering construction, master
Body structure construction, roof construction, decorative engineering construction etc..The place of construction operation is known as " construction site " or cries
" construction site, is also named building site.
During construction, often in sandstone containing many bulky grain rubbles etc., it is impossible to directly use, but need by
After sieve takes, construction requirement can be only achieved.When carrying out sieving husky operation on building site at present, typically completed by construction worker,
Its heavy workload, and work efficiency is low, it is difficult to realize efficient construction.
The content of the invention
It is an object of the invention to provide a kind of building sand two level screening plant, to solve to propose in above-mentioned background technology
The problem of.
To achieve the above object, the present invention provides following technical solution：
A kind of building sand two level screening plant, including base, screen box, damping noise reduction component, No.1 cam, No. two cams,
Level-one sieve plate and two level sieve plate, the damping noise reduction component that the screen box is set by its bottom four corners are erected at the upper of base
Side；Level horizontally slips equipped with level-one sieve plate in the screen box upper lumen；It is horizontal left in the middle part inner cavity of the screen box
Right slip is equipped with two level sieve plate；Two stop sleevees, two branch are symmetrically fixedly installed on the right plate inner wall of the screen box
Sliding chamber is offered in support set cylinder, sliding intracavitary is equipped with connecting spring, and one end of connecting spring is fixedly connected with the bottom of sliding chamber；
The right end of the level-one sieve plate is fixedly connected with the connecting spring end on a stop sleeve；The right side of the two level sieve plate
End is fixedly connected with the other end of connecting spring with the connecting spring end another described on stop sleeve；The level-one sieve plate
Left end be installed with No.1 pressing plate；The left end of the two level sieve plate is installed with No. two pressing plates；A left side for the screen box
Be fixedly installed L-type support on side plate, L-type support it is upper by bearing connection mode distinguish rotating turret be equipped with No.1 cam and
It is sequentially connected between No. two cams, wherein No.1 cam and No. two cams by transmission belt.
As the further scheme of the present invention：The damping noise reduction component includes supporting slider, fixes sleeve, sliding block, slow
The top of spring and sound-absorbing ball, wherein fixes sleeve fixed setting base is rushed, sliding block is slided up and down arranged on the inside of fixes sleeve,
The top of supporting slider is fixedly connected with the bottom of screen box, and the basal sliding of supporting slider is through opening on fixes sleeve top plate
If guiding slide opening after be fixedly connected with a slide block, buffer spring is placed in bottom in fixes sleeve.
As the further scheme of the present invention：The sound-absorbing ball uses sponge ball, and sound-absorbing ball is filled between buffer spring
Between gap.
As the further scheme of the present invention：Also it is fixedly mounted in the L-type support and is useful for driving No.1 cam rotation
Servomotor.
As the further scheme of the present invention：The No.1 cam and No. two pressing plates are in same level and highly set；Institute
State No. two cams and No.1 pressing plate is in same level and highly sets.
As the further scheme of the present invention：The inner cavity top of the screen box offers the window that feeds intake.
As the further scheme of the present invention：The intracavity bottom of the screen box is obliquely installed for right low left high, screens
The right end of box cavity bottom is provided with and communicated with drainage conduit.
As the further scheme of the present invention：The back side panel of the screen box offer two respectively with level-one sieve plate and two
Level sieve plate is engaged the scum pipe of setting.
As the further scheme of the present invention：The structure of the No.1 pressing plate and No. two pressing plates is identical, No.1 pressing plate and two
The both ends of number pressing plate are equipped with arc panel.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention synchronizes rotation, No.1 cam and No. two cams point using servomotor driving No.1 cam and No. two cams
No. two pressing plates and No.1 pressing plate, the setting of mating connection spring are not impacted not constantly, can realize that level-one sieve plate and two level sieve plate exist
Swinging in horizontal direction, and the convex portion on the convex portion and No. two cams on No.1 cam is in opposite direction all the time, makes
Obtain level-one sieve plate and two level sieve plate remains that opposite direction is moved, improve screening effect and screening efficiency；The damping of setting
Noise reduction components not only good damping effect, but also effectively reduce noise.
Brief description of the drawings
Fig. 1 is the structure diagram of building sand two level screening plant.
Fig. 2 is the structure diagram of damping noise reduction component in building sand two level screening plant.
In figure：1- bases, 2- screen boxes, 3- damping noise reduction components, 4-L type stents, 5- No.1 cams, No. bis- cams of 6-,
7- level-one sieve plates, 8- two level sieve plates, 9- feed intake window, 10- deslagging windows, 11- stop sleevees, 12- connecting springs, 13- drainage conduits,
14- No.1 pressing plates, 15- transmission belts, No. bis- pressing plates of 16-, 17- slide chamber, 31- supporting sliders, 32- fixes sleeves, 33- sliding blocks, 34-
Buffer spring, 35- sound-absorbing balls.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
Please refer to Fig.1~2, in the embodiment of the present invention, a kind of building sand two level screening plant, including base 1, screen box
2nd, damping noise reduction component 3,5, No. two cams 6 of No.1 cam, level-one sieve plate 7 and two level sieve plate 8, the screen box 2 pass through its bottom
The damping noise reduction component 3 that portion corner is set is erected at the top of base 1；Level horizontally slips in 2 upper lumen of screen box
Equipped with level-one sieve plate 7；Level horizontally slips equipped with two level sieve plate 8 in the middle part inner cavity of the screen box 2；The screen box 2
Two stop sleevees 11 are symmetrically fixedly installed on right plate inner wall, sliding chamber 17, sliding chamber are offered in two stop sleevees 11
Connecting spring 12 is equipped with 17, one end of connecting spring 12 is fixedly connected with the bottom of sliding chamber 17；The right side of the level-one sieve plate 7
End, which is slided, to be arranged in the cunning chamber 17 on a stop sleeve 11, and the right end of level-one sieve plate 7 and a stop sleeve
12 end of connecting spring on 11 is fixedly connected, and the left part of level-one sieve plate 7 is slided leads through what is opened up on 2 left plate of screen box
Into passage；The right end of the two level sieve plate 8, which slides, to be arranged in the cunning chamber 17 on another described stop sleeve 11, and two level is sieved
The right end of plate 8 is fixed with the other end of connecting spring 12 with 12 end of connecting spring on another described stop sleeve 11 to be connected
Connect, the left end of two level sieve plate 8 is slided through in the guide channel opened up on 2 left plate of screen box；A left side for the level-one sieve plate 7
End is installed with No.1 pressing plate 14；The left end of the two level sieve plate 8 is installed with No. two pressing plates 16；The screen box 2
It is fixedly installed L-type support 4 on left plate, the upper of L-type support 4 distinguishes rotating turret by bearing connection mode to be equipped with No.1 convex
Wheel 5 and No. two cams 6, are wherein sequentially connected between No.1 cam 5 and No. two cams 6 by transmission belt 15, the L-type support 4
On be also fixedly mounted and be useful for the servomotor that driving No.1 cam 5 rotates；The No.1 cam 5 and No. two pressing plates 16 are in same
One level height is set, and when No.1 cam 5 rotates, the convex portion on No.1 cam 5 can be impacted on No. two pressing plates 16；Institute
State No. two cams 6 and No.1 pressing plate 14 is in same level and highly sets, it is convex on No. two cams 6 when No. two cams 6 rotate
Portion can be impacted on No.1 pressing plate 14.
The inner cavity top of the screen box 2 offers the window 9 that feeds intake；The intracavity bottom of the screen box 2 is right low left high
Be obliquely installed, the right end of 2 intracavity bottom of screen box is provided with and communicated with drainage conduit 13, and blow-off valve is provided with drainage conduit 13；Institute
The back side panel for stating screen box 2 offers two scum pipes 10 for being engaged setting with level-one sieve plate 7 and two level sieve plate 8 respectively, beats
The convenient waste residue by level-one sieve plate 7 and two level sieve plate 8 of scum pipe 10 is opened to discharge.
Convex portion on the No.1 cam 5 is reversed with the convex portion direction on No. two cams 6 so that level-one sieve plate
7 and two level sieve plate 8 remain and move in the opposite direction, improve screening effect.
The No.1 pressing plate 14 is identical with the structure of No. two pressing plates 16, and the both ends of No.1 pressing plate 14 and No. two pressing plates 16 are all provided with
There is arc panel.
The damping noise reduction component 3 includes supporting slider 31, fixes sleeve 32, sliding block 33, buffer spring 34 and sound-absorbing ball
35, the top of base 1 is fixedly installed in wherein fixes sleeve 32, and sliding block 33 is slided up and down arranged on the inside of fixes sleeve 32, support
The top of slide bar 31 is fixedly connected with the bottom of screen box 2, and the basal sliding of supporting slider 31 is through 32 top plate of fixes sleeve
On be fixedly connected with sliding block 33 after the guiding slide opening that opens up, buffer spring 34 is placed in bottom in fixes sleeve 32, and sound-absorbing ball 35 is adopted
With sponge ball, sound-absorbing ball 35 is filled between the gap of buffer spring 34；The setting of buffer spring 34 can play whole device
To good damping, buffering effect, and sound-absorbing ball 35 can effectively absorb the friction that buffer spring 34 produces in contraction process and make an uproar
Sound, not only good damping effect, but also effectively reduce noise.
The present invention synchronizes rotation, No.1 cam 5 and two using servomotor driving No.1 cam 5 and No. two cams 6
Constantly No. two pressing plates 16 of impact and No.1 pressing plate 14, the setting of mating connection spring 12 respectively of number cam 6, can realize that level-one is sieved
Plate 7 and two level sieve plate 8 swinging in the horizontal direction, and the convex portion on the convex portion and No. two cams 6 on No.1 cam 5 is begun
Be in opposite direction eventually so that level-one sieve plate 7 and two level sieve plate 8 remain that opposite direction is moved, improve screening effect with
Screening efficiency；The damping noise reduction component not only good damping effect, but also effectively reduce noise of setting.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference numeral in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical solution, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (9)
1. a kind of building sand two level screening plant, including base（1）, screen box（2）, damping noise reduction component（3）, No.1 cam
（5）, No. two cams（6）, level-one sieve plate（7）With two level sieve plate（8）, it is characterised in that the screen box（2）Pass through its bottom four
The damping noise reduction component that angle is set（3）It is erected at base（1）Top, the screen box（2）Horizontal left and right is sliding in upper lumen
It is dynamic to be equipped with level-one sieve plate（7）, the screen box（2）Middle part inner cavity in level horizontally slip equipped with two level sieve plate（8）, the sieve
Select case（2）Right plate inner wall on be symmetrically fixedly installed two stop sleevees（11）, two stop sleevees（11）Inside open up
There is sliding chamber（17）, sliding chamber（17）Inside it is equipped with connecting spring（12）, connecting spring（12）One end and sliding chamber（17）Bottom consolidate
Fixed connection, the level-one sieve plate（7）Right end and a stop sleeve（11）On connecting spring（12）End, which is fixed, to be connected
Connect, the two level sieve plate（8）Right end and connecting spring（12）The other end and another described stop sleeve（11）On company
Connect spring（12）End is fixedly connected, the level-one sieve plate（7）Left end be installed with No.1 pressing plate（14）, the two level sieve
Plate（8）Left end be installed with No. two pressing plates（16）, the screen box（2）Left plate on be fixedly installed L-type support
（4）, L-type support（4）It is upper by bearing connection mode distinguish rotating turret be equipped with No.1 cam（5）With No. two cams（6）, its
Middle No.1 cam（5）With No. two cams（6）Between pass through transmission belt（15）It is sequentially connected.
A kind of 2. building sand two level screening plant according to claim 1, it is characterised in that the damping noise reduction component
（3）Including supporting slider（31）, fixes sleeve（32）, sliding block（33）, buffer spring（34）With sound-absorbing ball（35）, wherein fixing sleeve
Cylinder（32）Base is fixedly installed（1）Top, sliding block（33）Slide up and down and be arranged on fixes sleeve（32）Inside, supporting slider
（31）Top and screen box（2）Bottom be fixedly connected, supporting slider（31）Basal sliding through fixes sleeve（32）
After the guiding slide opening opened up on top plate with sliding block（33）It is fixedly connected, buffer spring（34）It is placed in fixes sleeve（32）Interior bottom.
A kind of 3. building sand two level screening plant according to claim 2, it is characterised in that the sound-absorbing ball（35）Adopt
With sponge ball, sound-absorbing ball（35）It is filled in buffer spring（34）Gap between.
A kind of 4. building sand two level screening plant according to claim 1, it is characterised in that the L-type support（4）On
Also it is fixedly mounted and is useful for driving No.1 cam（5）The servomotor of rotation.
A kind of 5. building sand two level screening plant according to claim 1, it is characterised in that the No.1 cam（5）
With No. two pressing plates（16）Highly set in same level, No. two cams（6）With No.1 pressing plate（14）In same level
Highly set.
A kind of 6. building sand two level screening plant according to claim 1, it is characterised in that the screen box（2）'s
Inner cavity top offers the window that feeds intake（9）.
A kind of 7. building sand two level screening plant according to claim 1, it is characterised in that the screen box（2）'s
Intracavity bottom is obliquely installed for right low left high, screen box（2）The right end of intracavity bottom is provided with and communicated with drainage conduit（13）.
A kind of 8. building sand two level screening plant according to claim 1, it is characterised in that the screen box（2）'s
Back side panel offer two respectively with level-one sieve plate（7）With two level sieve plate（8）It is engaged the scum pipe of setting（10）.
A kind of 9. building sand two level screening plant according to claim 1, it is characterised in that the No.1 pressing plate（14）
With No. two pressing plates（16）Structure it is identical, No.1 pressing plate（14）With No. two pressing plates（16）Both ends be equipped with arc panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711304090.3A CN107899935A (en) | 2017-12-11 | 2017-12-11 | A kind of building sand two level screening plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711304090.3A CN107899935A (en) | 2017-12-11 | 2017-12-11 | A kind of building sand two level screening plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107899935A true CN107899935A (en) | 2018-04-13 |
Family
ID=61865261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711304090.3A Withdrawn CN107899935A (en) | 2017-12-11 | 2017-12-11 | A kind of building sand two level screening plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107899935A (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108372108A (en) * | 2018-05-12 | 2018-08-07 | 杨冬梅 | A kind of Chinese medicine removal pesticide residue device |
| CN108372107A (en) * | 2018-05-12 | 2018-08-07 | 杨冬梅 | A kind of safe Chinese medicine removal pesticide residue device |
| CN108576914A (en) * | 2018-05-31 | 2018-09-28 | 江西中烟工业有限责任公司 | Based on the tobacco processing offal and stalk head two level screening plant for shaking screening |
| CN108672270A (en) * | 2018-06-13 | 2018-10-19 | 江明科 | A kind of quick sand sifter of architectural engineering |
| CN108838961A (en) * | 2018-07-10 | 2018-11-20 | 兰州集智信息技术有限公司 | A kind of damping noise reduction precision machinery machine table device |
| CN109174607A (en) * | 2018-08-22 | 2019-01-11 | 芜湖禧来旺农业科技有限公司 | Screening installation is used in a kind of processing of horseshoe |
| CN109396037A (en) * | 2018-09-05 | 2019-03-01 | 安徽粮友机械科技有限公司 | A kind of grain cleaning dust-extraction unit |
| CN109894343A (en) * | 2019-04-16 | 2019-06-18 | 昆山新浦瑞金属材料有限公司 | The screening machine of shot for metallic surface finishing |
| CN110201876A (en) * | 2019-05-06 | 2019-09-06 | 林有连 | A kind of sand screening machine |
| CN110470560A (en) * | 2019-08-08 | 2019-11-19 | 河南省第二公路工程有限公司 | Cement stabilized macadam mixture ratio designs automatic sieving instrument and backstepping design method |
| CN110732370A (en) * | 2019-12-02 | 2020-01-31 | 东阳潘辰竹木工艺品有限公司 | bamboo charcoal smashing and screening equipment |
| CN111014036A (en) * | 2019-11-22 | 2020-04-17 | 安徽顺科生产力促进中心有限公司 | Rapeseed screening equipment for agricultural production and processing |
| CN111014007A (en) * | 2019-12-03 | 2020-04-17 | 芜湖鼎恒材料技术有限公司 | Metal powder storage bin for secondary classified screening |
| CN111069034A (en) * | 2020-01-09 | 2020-04-28 | 潘品鸿 | Sand and stone separator for building |
| CN112827810A (en) * | 2021-01-05 | 2021-05-25 | 九江昌顺新材料有限公司 | Shockproof high-reflectivity powder coating screening device |
| CN115155755A (en) * | 2022-07-28 | 2022-10-11 | 唐山神州机械集团有限公司 | Dry coal preparation equipment for coal mine |
| CN117463613A (en) * | 2023-12-26 | 2024-01-30 | 洛阳海思德重工有限公司 | Vibration screening device |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108372107A (en) * | 2018-05-12 | 2018-08-07 | 杨冬梅 | A kind of safe Chinese medicine removal pesticide residue device |
| CN108372108A (en) * | 2018-05-12 | 2018-08-07 | 杨冬梅 | A kind of Chinese medicine removal pesticide residue device |
| CN108576914B (en) * | 2018-05-31 | 2023-05-19 | 江西中烟工业有限责任公司 | Tobacco stem and stem head secondary screening device for tobacco processing based on shaking screening |
| CN108576914A (en) * | 2018-05-31 | 2018-09-28 | 江西中烟工业有限责任公司 | Based on the tobacco processing offal and stalk head two level screening plant for shaking screening |
| CN108672270A (en) * | 2018-06-13 | 2018-10-19 | 江明科 | A kind of quick sand sifter of architectural engineering |
| CN108838961A (en) * | 2018-07-10 | 2018-11-20 | 兰州集智信息技术有限公司 | A kind of damping noise reduction precision machinery machine table device |
| CN109174607A (en) * | 2018-08-22 | 2019-01-11 | 芜湖禧来旺农业科技有限公司 | Screening installation is used in a kind of processing of horseshoe |
| CN109396037A (en) * | 2018-09-05 | 2019-03-01 | 安徽粮友机械科技有限公司 | A kind of grain cleaning dust-extraction unit |
| CN109894343A (en) * | 2019-04-16 | 2019-06-18 | 昆山新浦瑞金属材料有限公司 | The screening machine of shot for metallic surface finishing |
| CN110201876A (en) * | 2019-05-06 | 2019-09-06 | 林有连 | A kind of sand screening machine |
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