CN108212771A - A kind of construction sandy soil screening device - Google Patents
A kind of construction sandy soil screening device Download PDFInfo
- Publication number
- CN108212771A CN108212771A CN201810324618.1A CN201810324618A CN108212771A CN 108212771 A CN108212771 A CN 108212771A CN 201810324618 A CN201810324618 A CN 201810324618A CN 108212771 A CN108212771 A CN 108212771A
- Authority
- CN
- China
- Prior art keywords
- fixedly connected
- motor
- sandy soil
- fixed
- fixed column
- 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
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of construction sandy soil screening devices, including pedestal, the upper surface of the pedestal is fixedly connected with the first fixed column, the left side of first fixed column is fixedly connected with the first fixed plate, and first the upper surface of fixed plate be fixedly connected with the first motor, and first the output shaft of motor be fixedly connected with the left end of first rotating shaft, the surface of the first rotating shaft is socketed with clutch shaft bearing, and the surface of clutch shaft bearing is connected to the left side of the first fixed column.Construction sandy soil screening device, by setting the first motor, the first motor is made to pass through the first cam, thrust is applied to push plate so that screen box rearwardly moves, so as to which the sandy soil to be screened inside screen box be driven to move, so as to instead of artificial, cost is reduced, improves the efficiency of screening, the setting of fixed transverse slat, fixed function is played to slide bar and sliding sleeve, so as to which the work of screen box be made more to stablize.
Description
Technical field
The present invention relates to technical field of building construction, specially a kind of construction sandy soil screening device.
Background technology
As population is continuously increased, the continuous improvement of living standard, the whole infrastructure of society is also being carried out energetically,
The fast development of construction has driven social progress, provides convenience for people’s lives, in time cost, human cost
Under the overall situation constantly risen, awkward situation of high cost, that efficiency is low is just faced with for the screening operation of construction sandy soil, it is existing
Still the main screening operation that sandy soil are manually completed with simple device, such case exist in modern many construction places
It is simple device, inconvenient, high labor cost, the low problem of efficiency, if there is mechanical device replaces being accomplished manually work, just
Production cost can be reduced, improves production efficiency.
Invention content
（One）The technical issues of solution
In view of the deficiencies of the prior art, the present invention provides a kind of construction sandy soil screening device, it is simple to solve device,
It is inconvenient, the problem of high labor cost, efficiency is low.
（Two）Technical solution
To achieve the above object, the present invention provides following technical solution：A kind of construction sandy soil screening device, the bottom of including
Seat, the upper surface of the pedestal are fixedly connected with the first fixed column, and the left side of first fixed column is fixedly connected with first
Fixed plate, and the upper surface of the first fixed plate is fixedly connected with the first motor, and the output shaft of the first motor and first rotating shaft
Left end is fixedly connected, and the surface of the first rotating shaft is socketed with clutch shaft bearing, and the surface of clutch shaft bearing is connected to the first fixation
The left side of column, the surface of the first rotating shaft are socketed with second bearing, and second bearing is connected to the right side of the second fixed column
The opposite face of face, first fixed column and the second fixed column is fixedly connected with fixed transverse slat, the front card of the fixed transverse slat
The first sliding sleeve is connected to, and the first slide bar is slidably connected in the first sliding sleeve, the lower surface of first slide bar, which is fixedly connected with, to push away
Plate, the front of the push plate overlap, and first rotating shaft is connected in the first cam with the back side of the first cam, first slide bar
The one end at the back side is fixedly connected with the front of screen box, and the inner wall of screen box is fixedly connected with sieve, and the back side of the screen box is fixed
The second slide bar and telescopic rod are connected with, the surface of second slide bar is socketed with the second sliding sleeve, and the surface clamping of the second sliding sleeve
In the front of support plate, the front of the support plate is fixedly connected with telescopic rod, and the surface of the telescopic rod is socketed with spring, institute
The one end for stating spring is fixedly connected with the back side of screen box, and the other end of spring is fixedly connected with the front of support plate, the branch
The front of fagging is fixedly connected with motor cabinet, and the upper surface of motor cabinet is fixedly connected with the second motor, second motor
Output shaft is fixedly connected with active turntable, and active turntable is sequentially connected with driven turntable, the driven turntable by transmission belt
Right side be connected with the 4th shaft, the surface of the 4th shaft is socketed with fourth bearing, and the surface clamping of fourth bearing
In the side of the first fixed column, the 4th shaft is fixedly connected with the left side of the second cam, and the upper surface of the second cam
Lower surface with carrying husky plate overlaps, and the left side for carrying husky plate and right side have been fixedly connected with third shaft, and third turns
The surface of axis is socketed with 3rd bearing, and the surface of the 3rd bearing is connected to the side of support plate inner wall, and described second fixes
The left side of column is fixedly connected with the second fixed plate, and the left side of the second fixed plate is fixedly connected with the right side of deflector.
Preferably, the back side of the support plate is provided with switch, and the position switched is located at the top of the second sliding sleeve.
Preferably, the back side of the support plate is fixedly connected with accumulator, and the position of accumulator is located at the second sliding sleeve
Lower section.
Preferably, the output terminal of the accumulator be electrically connected with the input terminal switched, and the output terminal of switch is respectively with the
The input terminal of one motor and the second motor is electrically connected.
Preferably, the husky plate of the load opens up fluted, and the vertical line of groove minimum point is overlapped with the vertical line at deflector center.
Preferably, the deflector is heeling condition, and the left end of deflector is located at the top of screen box.
（Three）Advantageous effect
The present invention provides a kind of construction sandy soil screening devices, have following advantageous effect：
1st, construction sandy soil screening device by setting the first motor, makes the first motor pass through the first cam to push plate
Apply thrust so that screen box rearwardly moves, so as to which the sandy soil to be screened inside screen box be driven to move, so as to reach screening sandy soil
Purpose, the spring at the screen box back side generates the thrust to screen box under the effect of elasticity after being squeezed, so as to return to screen box
Position originally so as to achieve the purpose that screening again, makes the first motor work on, screen box just moves back and forth, ceaselessly
Sandy soil are screened, thus instead of artificial, reduce cost, improve the efficiency of screening, the setting of fixed transverse slat, to cunning
Bar and sliding sleeve play fixed function, so as to which the work of screen box be made more to stablize.
2nd, construction sandy soil screening device, by setting the second cam so that carrying that the angle of husky plate becomes can be with
It adjusts, the flowing velocity for carrying the sandy soil to be screened above husky plate is controlled by changing the rotation position of the second cam,
And which has a compact structure and a reasonable design of the present invention, it is highly practical.
Description of the drawings
Fig. 1 is the structure diagram that the present invention faces；
Fig. 2 is the structure diagram of left view of the present invention.
In figure：1 pedestal, 2 first fixed columns, 3 first fixed plates, 4 first motors, 5 first rotating shafts, 6 clutch shaft bearings, 7
Transverse slat, 13 first sliding sleeves, 14 first cunnings are fixed in two bearings, 8 second fixed plates, 9 deflectors, 10 first cams, 11 push plates, 12
Bar, 15 screen boxs, 16 second fixed columns, 17 support plates, 18 3rd bearings, 19 third shafts, 20 carry husky plate, 21 fourth bearings, 22
4th shaft, 23 driven turntables, 24 transmission belts, 25 second cams, 26 active turntables, 27 second motors, 28 motor cabinets, 29 are opened
Pass, 30 second sliding sleeves, 31 second slide bars, 32 telescopic rods, 33 springs, 34 accumulators, 35 sieves.
Specific 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 shall fall within the protection scope of the present invention.
As shown in Figs. 1-2, the present invention provides a kind of technical solution：A kind of construction sandy soil screening device, the bottom of including
Seat 1, the upper surface of pedestal 1 is fixedly connected with the first fixed column 2, the setting of the first fixed column 2, to the first motor 4 and first turn
Axis 5 plays supporting role, the work of the first motor 4 is made more to stablize, the left side of the first fixed column 2 is fixedly connected with first
Fixed plate 3, and the upper surface of the first fixed plate 3 is fixedly connected with the first motor 4, and the output shaft of the first motor 4 and first turn
The left end of axis 5 is fixedly connected, and the transmission of power that the setting of first rotating shaft 5 exports the first motor 4 is more efficient, first rotating shaft 5
Surface be socketed with clutch shaft bearing 6, and the surface of clutch shaft bearing 6 is connected to the left side of the first fixed column 2, first rotating shaft 5
Surface is socketed with second bearing 7, and second bearing 7 is connected to the right side of the second fixed column 16, and the first fixed column 2 and second is solid
The opposite face of fixed column 16 is fixedly connected with fixed transverse slat 12, and the setting of fixed transverse slat 12 plays fixed work to the first slide bar 14
With, it is ensured that the steady operation of screen box 15, and the first fixed column 2 is fixedly connected with the second fixed column 16, make structure more steady
Fixed, the front of fixed transverse slat 12 is connected with the first sliding sleeve 13, and the first slide bar 14 is slidably connected in the first sliding sleeve 13, and first slides
The lower surface of bar 14 is fixedly connected with push plate 11, and the front of push plate 11 is overlapped with the back side of the first cam 10, the first cam 10
Setting makes the simpler realization of forms of motion of structure, not only easy to produce to assemble but also reduce production cost, and the first cam 10
First rotating shaft 5 is inside connected with, the one end at 14 back side of the first slide bar is fixedly connected with the front of screen box 15, and the setting of screen box 15 makes sieve
Select work more convenient, and the inner wall of screen box 15 is fixedly connected with sieve 35, the back side of screen box 15 is fixedly connected with the second slide bar
31 and telescopic rod 32, fixed function is played to screen box 15 using telescopic rod 32, again limits the position of spring 33, the second slide bar
31 surface is socketed with the second sliding sleeve 30, and the surface of the second sliding sleeve 30 is connected to the front of support plate 17, the back of the body of support plate 17
Face is provided with switch 29, and the position of switch 29 is located at the top of the second sliding sleeve 30, and the back side of support plate 17 is fixedly connected with storage
Battery 34, the setting of accumulator 34 make the first motor 4 and the second motor 27 that can also work in the case of no extraneous power supply,
It provides convenience for user, and the position of accumulator 34 is located at the lower section of the second sliding sleeve 30, the output terminal of accumulator 34 is with opening
29 input terminal electrical connection is closed, and input terminal of the output terminal of switch 29 respectively with the first motor 4 and the second motor 27 is electrically connected,
The front of support plate 17 is fixedly connected with telescopic rod 32, and the surface of telescopic rod 32 is socketed with spring 33, one end of spring 33 and sieve
The back side of case 15 is fixedly connected, and the other end of spring 33 is fixedly connected with the front of support plate 17, is being fixed on support plate 17 just
The spring 33 at 15 back side of face and screen box, plays screen box 15 push-and-pull action, and the front of support plate 17 is fixedly connected with motor cabinet
28, and the upper surface of motor cabinet 28 is fixedly connected with the second motor 27, the output shaft of the second motor 27, which is fixedly connected with, actively to be turned
Disk 26, and active turntable 26 is sequentially connected with driven turntable 23 by transmission belt 24, the use of transmission belt 24, be more convenient for assembling and
Maintenance during use, the right side of driven turntable 23 are connected with the 4th shaft 22, and the surface of the 4th shaft 22 is socketed with the 4th
Bearing 21, and the surface of fourth bearing 21 is connected to the left side of the side of the first fixed column 2, the 4th shaft 22 and the second cam 25
Face is fixedly connected, and the upper surface of the second cam 25 is overlapped with carrying the lower surface of husky plate 20, and the husky plate 20 of load opens up fluted and recessed
The vertical line of slot minimum point is overlapped with the vertical line at 9 center of deflector, and the setting of groove controls the flow direction for the sandy soil to be screened
And position, it carries the left side of husky plate 20 and right side and has been fixedly connected with third shaft 19, and the surface socket of third shaft 19
There is 3rd bearing 18, the surface of 3rd bearing 18 is connected to the side of 17 inner wall of support plate, and the left side of the second fixed column 16 is consolidated
Surely the second fixed plate 8 is connected with, and the left side of the second fixed plate 8 is fixedly connected with the right side of deflector 9, deflector 9 is
Heeling condition, the setting of deflector 9, the sandy soil to be screened of being more convenient for are flowed into screen box 15, and the left end of deflector 9 is located at sieve
The top of case 15.
In use, by the way that the second cam 25 is controlled to rotate, when the second cam 25 rotates to lower section, the husky plate 20 of load, which is located at, to incline
Ramp-like state needs the sandy soil screened that will flow downward under the effect of gravity at this time, and the sandy soil flowed down are entered by deflector 9
Screen box 15, screen box 15 move, and the opposite side of screen box 15 can squeeze spring under the action of the first motor 4 and the first cam 10
33, when the first cam 10 leaves the surface of push plate 11, screen box 15 can be such that screen box 15 returns to just under the elastic force effect of spring 33
The position of beginning, such screen box 15 just complete primary reciprocal motion process, thus by the sieve 35 in screen box 15, to sandy soil
It is screened, the second motor 27, which continues to drive the second cam 25 to work, just makes screen box 15 continue to move reciprocatingly screening sandy soil.
It can to sum up obtain, 1, construction sandy soil screening device, by setting the first motor 4, pass through the first motor 4
First cam 10 applies thrust to push plate 11 so that screen box 15 rearwardly moves, so as to drive the sand to be screened inside screen box 15
Soil movement, so as to achieve the purpose that screen sandy soil, the spring 33 at 15 back side of screen box generates under the effect of elasticity after being squeezed
To the thrust of screen box 15, so as to which screen box 15 be made to return to original position, so as to achieve the purpose that screening again, make the first motor
4 work on, and screen box 15 just moves back and forth, and ceaselessly sandy soil are screened, thus instead of artificial, reduce cost, carry
The high efficiency of screening, the setting of fixed transverse slat 12 play fixed function, so as to make the work of screen box 15 to slide bar and sliding sleeve
More stablize.
2nd, construction sandy soil screening device, by setting the second cam 25 so that carrying the angle of husky plate 20 becomes
It can adjust, the stream for carrying the husky 20 top sandy soil to be screened of plate is controlled by changing the rotation position of the second cam 25
Dynamic speed, and which has a compact structure and a reasonable design of the present invention, it is highly practical.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of construction sandy soil screening device, including pedestal（1）, it is characterised in that：The pedestal（1）Upper surface consolidate
Surely it is connected with the first fixed column（2）, first fixed column（2）Left side be fixedly connected with the first fixed plate（3）, and first
Fixed plate（3）Upper surface be fixedly connected with the first motor（4）, and the first motor（4）Output shaft and first rotating shaft（5）A left side
End is fixedly connected, the first rotating shaft（5）Surface be socketed with clutch shaft bearing（6）, and clutch shaft bearing（6）Surface be connected to
One fixed column（2）Left side, the first rotating shaft（5）Surface be socketed with second bearing（7）, and second bearing（7）Clamping
In the second fixed column（16）Right side, first fixed column（2）With the second fixed column（16）Opposite face be fixedly connected with
Fixed transverse slat（12）, the fixed transverse slat（12）Front be connected with the first sliding sleeve（13）, and the first sliding sleeve（13）The interior company of slip
It is connected to the first slide bar（14）, first slide bar（14）Lower surface be fixedly connected with push plate（11）, the push plate（11）Just
Face and the first cam（10）Back side overlap joint, and the first cam（10）Inside it is connected with first rotating shaft（5）, first slide bar（14）
The one end at the back side and screen box（15）Front be fixedly connected, and screen box（15）Inner wall be fixedly connected with sieve（35）, the sieve
Case（15）The back side be fixedly connected with the second slide bar（31）And telescopic rod（32）, second slide bar（31）Surface be socketed with
Two sliding sleeves（30）, and the second sliding sleeve（30）Surface be connected to support plate（17）Front, the support plate（17）Front consolidate
Surely it is connected with telescopic rod（32）, the telescopic rod（32）Surface be socketed with spring（33）, the spring（33）One end and sieve
Case（15）The back side be fixedly connected, and spring（33）The other end and support plate（17）Front be fixedly connected, the support plate
（17）Front be fixedly connected with motor cabinet（28）, and motor cabinet（28）Upper surface be fixedly connected with the second motor（27）, institute
State the second motor（27）Output shaft be fixedly connected with active turntable（26）, and active turntable（26）Pass through transmission belt（24）Transmission
It is connected with driven turntable（23）, the driven turntable（23）Right side be connected with the 4th shaft（22）, the 4th shaft
（22）Surface be socketed with fourth bearing（21）, and fourth bearing（21）Surface be connected to the first fixed column（2）Side, institute
State the 4th shaft（22）With the second cam（25）Left side be fixedly connected, and the second cam（25）Upper surface with carrying husky plate
（20）Lower surface overlap joint, it is described to carry husky plate（20）Left side and right side be fixedly connected with third shaft（19）, and the
Three shafts（19）Surface be socketed with 3rd bearing（18）, the 3rd bearing（18）Surface be connected to support plate（17）Inner wall
Side, second fixed column（16）Left side be fixedly connected with the second fixed plate（8）, and the second fixed plate（8）A left side
Side and deflector（9）Right side be fixedly connected.
2. a kind of construction sandy soil screening device according to claim 1, it is characterised in that：The support plate（17）
The back side be provided with switch（29）, and switch（29）Position be located at the second sliding sleeve（30）Top.
3. a kind of construction sandy soil screening device according to claim 1, it is characterised in that：The support plate（17）
The back side be fixedly connected with accumulator（34）, and accumulator（34）Position be located at the second sliding sleeve（30）Lower section.
4. a kind of construction sandy soil screening device according to claim 3, it is characterised in that：The accumulator（34）
Output terminal and switch（29）Input terminal electrical connection, and switch（29）Output terminal respectively with the first motor（4）With the second electricity
Machine（27）Input terminal electrical connection.
5. a kind of construction sandy soil screening device according to claim 1, it is characterised in that：It is described to carry husky plate（20）
Open up fluted, and the vertical line and deflector of groove minimum point（9）The vertical line at center overlaps.
6. a kind of construction sandy soil screening device according to claim 1, it is characterised in that：The deflector（9）
For heeling condition, and deflector（9）Left end be located at screen box（15）Top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810324618.1A CN108212771A (en) | 2018-04-12 | 2018-04-12 | A kind of construction sandy soil screening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810324618.1A CN108212771A (en) | 2018-04-12 | 2018-04-12 | A kind of construction sandy soil screening device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108212771A true CN108212771A (en) | 2018-06-29 |
Family
ID=62657776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810324618.1A Pending CN108212771A (en) | 2018-04-12 | 2018-04-12 | A kind of construction sandy soil screening device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108212771A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07328546A (en) * | 1994-06-07 | 1995-12-19 | Aisin Sanki Kk | Size sorting machine |
| JP2000325886A (en) * | 1999-05-21 | 2000-11-28 | Okidate Tekko Kk | Hopper for sorting machine of shellfishes |
| CN203610311U (en) * | 2013-11-21 | 2014-05-28 | 天津市贝特瑞新能源科技有限公司 | Device improving artificial graphite smashing effect |
| CN205650453U (en) * | 2016-06-04 | 2016-10-19 | 山东胜伟园林科技有限公司 | Fertilizer screening plant |
| CN206578011U (en) * | 2016-12-16 | 2017-10-24 | 慈溪市匡堰盈兴竹制品厂(普通合伙) | A kind of sandstone category filter equipment |
| CN206716460U (en) * | 2017-05-23 | 2017-12-08 | 赵琼 | Husky equipment is sieved in a kind of multidirectional vibration-type construction |
| CN207071519U (en) * | 2017-06-07 | 2018-03-06 | 惠安康奥建材有限公司 | A kind of bridge sand screening plant |
| CN107855272A (en) * | 2017-11-03 | 2018-03-30 | 赣州牛研科技有限公司 | A kind of hydraulic engineering construction sand screening installation |
-
2018
- 2018-04-12 CN CN201810324618.1A patent/CN108212771A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07328546A (en) * | 1994-06-07 | 1995-12-19 | Aisin Sanki Kk | Size sorting machine |
| JP2000325886A (en) * | 1999-05-21 | 2000-11-28 | Okidate Tekko Kk | Hopper for sorting machine of shellfishes |
| CN203610311U (en) * | 2013-11-21 | 2014-05-28 | 天津市贝特瑞新能源科技有限公司 | Device improving artificial graphite smashing effect |
| CN205650453U (en) * | 2016-06-04 | 2016-10-19 | 山东胜伟园林科技有限公司 | Fertilizer screening plant |
| CN206578011U (en) * | 2016-12-16 | 2017-10-24 | 慈溪市匡堰盈兴竹制品厂(普通合伙) | A kind of sandstone category filter equipment |
| CN206716460U (en) * | 2017-05-23 | 2017-12-08 | 赵琼 | Husky equipment is sieved in a kind of multidirectional vibration-type construction |
| CN207071519U (en) * | 2017-06-07 | 2018-03-06 | 惠安康奥建材有限公司 | A kind of bridge sand screening plant |
| CN107855272A (en) * | 2017-11-03 | 2018-03-30 | 赣州牛研科技有限公司 | A kind of hydraulic engineering construction sand screening installation |
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Application publication date: 20180629 |
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