CN108325832A - A kind of multistage building waste screening vibrating screen - Google Patents
A kind of multistage building waste screening vibrating screen Download PDFInfo
- Publication number
- CN108325832A CN108325832A CN201810422329.5A CN201810422329A CN108325832A CN 108325832 A CN108325832 A CN 108325832A CN 201810422329 A CN201810422329 A CN 201810422329A CN 108325832 A CN108325832 A CN 108325832A
- Authority
- CN
- China
- Prior art keywords
- vibrating screen
- ontology
- vibrating
- wall
- material chamber
- 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
- 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
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
-
- 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
- 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
-
- 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
Abstract
The invention discloses a kind of multistage building waste screening vibrating screens, including ontology, it is provided with feed hopper above the ontology, and feed hopper is connected to the upper outer wall of ontology, the inside left of the ontology is provided with rotary electric machine, and the shaft of rotary electric machine is connect by shaft joint with bull stick, rubbing knife is welded on the outer wall of the bull stick, the inside of the ontology is left, right both sides are provided with cavity, and the bottom of cavity is both provided with beam, vibrating motor is installed above the beam, and the vibrating shaft of vibrating motor is connect by shaft joint with vibrating arm, the vibrating arm is connect by fixing bolt with the first vibrating screen.The present invention rubs knife, feed hopper by setting, feed hopper is connected to ontology, and it is provided with rubbing knife in the lower section of feed hopper, and rub knife and connect with rotary electric machine by shaft, i.e., directly can be broken into graininess rubbish by rubbing knife when building waste enters in feed hopper is convenient for preservation and recycling.
Description
Technical field
The present invention relates to garbage classification equipment technical field, specially a kind of multistage building waste screening vibrating screen.
Background technology
Vibrating screen is to be vibrated and worked using reciprocating rotary type caused by oscillator exciting, and the upper rotation weight of oscillator makes sieve
Face generates plane whirling vibration, and lower rotation weight then makes compass screen surface generate conical surface rotary vibration, and the effect of synergy then makes
Compass screen surface generates again rotation type and vibrates, and oscillation trajectory is a complicated space curve, which is projected as a circle in horizontal plane, and
On the vertical plane be projected as an ellipse, adjust the exciting force of upper and lower rotation weight, thus it is possible to vary amplitude, and adjusting upper and lower
The space phase angle of weight can then change the curve shape of compass screen surface movement locus and change the movement locus of material on compass screen surface.
The screening of conventional multi-level building waste has the following deficiencies place with vibrating screen：Traditional equipment can not divide rubbish
Class processing is to cause certain wasting of resources, while traditional building waste screening be easy to cause rubbish inside equipment with vibrating screen
Rubbish excessively to result in blockage the problem of.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of multistage building waste screening vibrating screen, biography is solved
The multistage building waste screening of system can not carry out rubbish classification processing to cause certain wasting of resources with vibrating screen, pass simultaneously
The building waste screening vibrating screen of system also have be easy to cause inside equipment rubbish excessively to result in blockage the problem of.
To achieve the above object, the present invention provides the following technical solutions：A kind of multistage building waste screening vibrating screen, packet
Ontology is included, feed hopper is provided with above the ontology, and feed hopper is connected to the upper outer wall of ontology, the inside of the ontology
Left side is provided with rotary electric machine, and the shaft of rotary electric machine is connect by shaft joint with bull stick, is welded on the outer wall of the bull stick
There is a rubbing knife, and the right end of bull stick and fixed axis connection, the inside arranged on left and right sides of the ontology is provided with cavity, and cavity
Bottom is both provided with beam, vibrating motor is equipped with above the beam, and the vibrating shaft of vibrating motor passes through connecting shaft
Device is connect with vibrating arm, and the vibrating arm is connect by fixing bolt with the first vibrating screen, and the top setting of the first vibrating screen
There is the second vibrating screen, third vibrating screen is provided with above second vibrating screen, and the second vibrating screen, third vibrating screen are all logical
It crosses fixing bolt to connect with vibrating arm, first material chamber, and second is provided between first vibrating screen and the second vibrating screen
Be provided with second material chamber between vibrating screen and third vibrating screen, the first material chamber, second material chamber right side inner wall on
It is provided with limited block, and is provided with telescopic rod between limited block, the right end of the telescopic rod is equipped with push plate, and push plate setting exists
The inside of first material chamber, second material chamber is provided with stopper on the left of the first material chamber, second material chamber, and hinders
Block is connected by the inner wall of hinge and ontology, and the bottom of the ontology is provided with holder, and holder be internally provided with it is universal
It takes turns, is provided with hinge on the right side of the upper outer wall of the ontology, and ontology is connect by hinge with side door, and be equipped on side door
Door handle is inlaid with control panel on the front side outer wall of the ontology.
Preferably, being twisted on the outer wall of the right end of the bull stick has external screw thread, and bull stick passes through external screw thread and fixation
The internal thread on inner wall perforated at the center of axis is connected, and the fixing axle is embedded on the right side inner wall of ontology.
Preferably, the through-hole of the inside of the second vibrating screens of through-hole little Yu of the inside of first vibrating screen, and second shakes
The through-hole of the inside of the through-hole little Yu third vibrating screens of the inside of dynamic sieve.
Preferably, the push plate be arranged first material chamber, second material chamber central axes on, and push plate and first material
The inner wall mating connection of chamber, second material chamber.
Preferably, the bottom of the vibrating motor totally two left and right cavitys for being separately positioned on body interior, and vibrate
Bar and the first vibrating screen, the second vibrating screen, third vibrating screen are all vertical.
The present invention provides a kind of multistage building waste screening vibrating screens, have following advantageous effect：
（1）The present invention can be realized by control panel to rotary electric machine and vibration by the way that universal wheel, side door, control panel is arranged
Motor carries out the startup of adjustment and equipment on rotating speed and closes to change the exploitation speed of equipment, while side door is arranged and is convenient for
It is daily that equipment is safeguarded and overhauled, while universal wheel is convenient for the displacement and carrying of equipment.
（2）By the way that the first vibrating screen, the second vibrating screen, third vibrating screen is arranged, the rubbish after blending falls the present invention
When can by the first vibrating screen, the second vibrating screen, third vibrating screen hierarchical screening and be trapped in the first vibrating screen, second vibration
Sieve, third vibrating screen upper chambers in can drive push plate that the indoor rubbish of chamber is pushed out stopper to quilt by telescopic rod
Classification recycling.
（3）The present invention rubs knife, feed hopper by setting, and feed hopper is connected to ontology, and is set in the lower section of feed hopper
It is equipped with rubbing knife, and rubs knife and connect with rotary electric machine by shaft, i.e., it can direct quilt when building waste enters in feed hopper
Rubbing knife is broken into graininess rubbish and is convenient for preserving and recycle, while decreasing the space that rubbish occupies inside equipment and increasing
Working efficiency is added.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the constructional appearance figure of the present invention.
In figure：1 ontology, 2 feed hoppers, 3 rotary electric machines, 4 bull sticks, 5 rubbing knives, 6 fixing axles, 7 cavitys, 8 beams, 9 shake
Dynamic motor, 10 shaft joints, 11 vibrating arms, 12 fixing bolts, 13 first vibrating screens, 14 second vibrating screens, 15 third vibrating screens, 16
First material chamber, 17 second material chambers, 18 limited blocks, 19 telescopic rods, 20 push plates, 21 stoppers, 22 holders, 23 universal wheels, 24
Hinge, 25 side doors, 26 door handles, 27 control panels.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
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 multistage building waste screening vibrating screen, including
The top of ontology 1, the ontology 1 is provided with feed hopper 2, and feed hopper 2 is connected to the upper outer wall of ontology 1, the ontology 1
Inside left is provided with rotary electric machine 3, and the shaft of rotary electric machine 3 is connect by shaft joint 10 with bull stick 4, the right side of bull stick 4
Being twisted on the outer wall of end has external screw thread, and bull stick 4 passes through the interior spiral shell at the center of external screw thread and fixing axle 6 on the inner wall of perforation
Line is connected, and the fixing axle 6 is embedded on the right side inner wall of ontology 1, and feed hopper 2 is connected to ontology 1, and in feed hopper 2
Lower section i.e. be provided with rub knife 5, and rub knife 5 connect with rotary electric machine 3 by bull stick 4, i.e., enter charging in building waste
Can graininess rubbish be directly broken by rubbing knife 5 when in bucket 2 and be convenient for preservation and recycling, welded on the outer wall of the bull stick 4
It being connected to and rubs knife 5, and the right end of bull stick 4 is connect with fixing axle 6, the inside arranged on left and right sides of the ontology 1 is provided with cavity 7, and
The bottom of cavity 7 is both provided with beam 8, and the top of the beam 8 is equipped with vibrating motor 9, two totally points of vibrating motor 9
The bottom of left and right cavity 7 inside ontology 1 is not set, and vibrating arm 11 and the first vibrating screen 13, the second vibrating screen 14,
Third vibrating screen 15 is all vertical, and the vibrating shaft of vibrating motor 9 is connect by shaft joint 10 with vibrating arm 11, and the vibrating arm 11 is logical
It crosses fixing bolt 12 to connect with the first vibrating screen 13, and the top of the first vibrating screen 13 is provided with the second vibrating screen 14, first shakes
The through-hole of the inside of the second vibrating screens of through-hole little Yu 14 of the inside of dynamic sieve 13, and the through-hole little Yu of the inside of the second vibrating screen 14
The top of the through-hole of the inside of third vibrating screen 15, second vibrating screen 14 is provided with third vibrating screen 15, and the second vibration
Sieve 14, third vibrating screen 15 are all connect by fixing bolt 12 with vibrating arm 11, can be by first when the rubbish after blending falls
Vibrating screen 13, the second vibrating screen 14, third vibrate 15 screening layereds and screen and be trapped in the first vibrating screen 13, the second vibrating screen
14, it can drive push plate 20 that the indoor rubbish of chamber is pushed out stopper by telescopic rod 19 in the upper chambers of third vibrating screen 15
To be classified recycling, it is provided with first material chamber 16 between first vibrating screen, 13 and second vibrating screen 14, and second shakes
Be provided with second material chamber 17 between dynamic sieve 14 and third vibrating screen 15, the first material chamber 16, second material chamber 17 the right side
It is provided with limited block 18 on the inner wall of side, and is provided with telescopic rod 19 between limited block 18, the right end of the telescopic rod 19 is equipped with
Push plate 20, and push plate 20 is arranged in the inside of first material chamber 16, second material chamber 17, push plate 20 is arranged in first material chamber
16, on the central axes of second material chamber 17, and push plate 20 and the inner wall of first material chamber 16, second material chamber 17 are connected,
The first material chamber 16, second material chamber 17 left side be provided with stopper 21, and stopper 21 passes through hinge 24 and ontology 1
Inner wall connection, the bottom of the ontology 1 is provided with holder 22, and holder 22 is internally provided with universal wheel 23, the ontology 1
Upper outer wall on the right side of be provided with hinge 24, and ontology 1 is connect by hinge 24 with side door 25, and is equipped with door on side door 25
Handle 26 is inlaid with control panel 27 on the front side outer wall of the ontology 1.
In use, putting into building waste into equipment by feed hopper 2, building waste can blend into particle by rubbing knife 5
The building waste of state, graininess can pass through third vibrating screen 14, and third vibrating screen 14 can be real under the action of vibrating motor 9
The medium and smaller building waste of its existing working effect particle can be directly entered in second material chamber 17, to by the second vibrating screen
14 are screened, and then short grained building waste can enter to be screened by the first vibrating screen 13 in first material chamber 16 and recycle, stagnant
More little particle can be blended by rubbing knife 5 again and be convenient for recycling by staying in the rubbish on 15 surface of third vibrating screen, and the first object
Building waste in material chamber 16 and second material chamber 17 can drive push plate 20 to push away the rubbish in it under the action of telescopic rod 19
Go out equipment to be convenient for recycling and utilize again.
It can to sum up obtain, the present invention rubs knife 5, feed hopper 2 by setting, and feed hopper 2 is connected to ontology 1, and in feed hopper 2
Lower section i.e. be provided with rub knife 5, and rub knife 5 connect with rotary electric machine 3 by bull stick 4, i.e., enter charging in building waste
Can graininess rubbish be directly broken by rubbing knife 5 when in bucket 2 and be convenient for preservation and recycling, while decrease rubbish occupancy
Space deflecting inside equipment increases the volume work efficiency of equipment.
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 (5)
1. a kind of multistage building waste screening vibrating screen, including ontology（1）, it is characterised in that：The ontology（1）Top set
It is equipped with feed hopper（2）, and feed hopper（2）With ontology（1）Upper outer wall connection, the ontology（1）Inside left be provided with
Rotary electric machine（3）, and rotary electric machine（3）Shaft pass through shaft joint（10）With bull stick（4）Connection, the bull stick（4）Outer wall
On be welded with rubbing knife（5）, and bull stick（4）Right end and fixing axle（6）Connection, the ontology（1）Inside arranged on left and right sides
Cavity is provided in inner wall（7）, and cavity（7）Bottom be both provided with beam（8）, the beam（8）Top installation
There is vibrating motor（9）, and vibrating motor（9）Vibrating shaft pass through shaft joint（10）With vibrating arm（11）Connection, the vibrating arm
（11）Pass through fixing bolt（12）With the first vibrating screen（13）Connection, and the first vibrating screen（13）Top be provided with the second vibration
Sieve（14）, second vibrating screen（14）Top be provided with third vibrating screen（15）, and the second vibrating screen（14）, third vibration
Sieve（15）All pass through fixing bolt（12）With vibrating arm（11）Connection, first vibrating screen（13）With the second vibrating screen（14）It
Between be provided with first material chamber（16）, and the second vibrating screen（14）With third vibrating screen（15）Between be provided with second material chamber
（17）, the first material chamber（16）, second material chamber（17）Right side inner wall on be provided with limited block（18）, and limited block
（18）Between be provided with telescopic rod（19）, the telescopic rod（19）Right end push plate is installed（20）, and push plate（20）Setting exists
First material chamber（16）, second material chamber（17）Inside, the first material chamber（16）, second material chamber（17）Left side set
It is equipped with stopper（21）, and stopper（21）Pass through hinge（24）With ontology（1）Inner wall connection, the ontology（1）Bottom
It is provided with holder（22）, and holder（22）Be internally provided with universal wheel（23）, the ontology（1）Upper outer wall on the right side of set
It is equipped with hinge（24）, and ontology（1）Pass through hinge（24）With side door（25）Connection, and side door（25）On door handle is installed
（26）, the ontology（1）Front side outer wall on be inlaid with control panel（27）.
2. a kind of multistage building waste screening vibrating screen according to claim 1, it is characterised in that：The bull stick（4）
Right end outer wall on be twisted have external screw thread, and bull stick（4）Pass through external screw thread and fixing axle（6）Center at perforate it is interior
Internal thread on wall is connected, the fixing axle（6）It is embedded in ontology（1）Right side inner wall on.
3. a kind of multistage building waste screening vibrating screen according to claim 1, it is characterised in that：First vibration
Sieve（13）Inside the second vibrating screens of through-hole little Yu（14）Inside through-hole, and the second vibrating screen（14）Inside through-hole
Little Yu third vibrating screens（15）Inside through-hole.
4. a kind of multistage building waste screening vibrating screen according to claim 1, it is characterised in that：The push plate（20）
It is arranged in first material chamber（16）, second material chamber（17）Central axes on, and push plate（20）With first material chamber（16）, second
Material cavity（17）Inner wall be connected.
5. a kind of multistage building waste screening vibrating screen according to claim 1, it is characterised in that：The vibrating motor
（9）Totally two are separately positioned on ontology（1）Internal left and right cavity（7）Bottom, and vibrating arm（11）With the first vibrating screen
（13）, the second vibrating screen（14）, third vibrating screen（15）It is all vertical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810422329.5A CN108325832A (en) | 2018-05-04 | 2018-05-04 | A kind of multistage building waste screening vibrating screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810422329.5A CN108325832A (en) | 2018-05-04 | 2018-05-04 | A kind of multistage building waste screening vibrating screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108325832A true CN108325832A (en) | 2018-07-27 |
Family
ID=62934655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810422329.5A Pending CN108325832A (en) | 2018-05-04 | 2018-05-04 | A kind of multistage building waste screening vibrating screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108325832A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109482300A (en) * | 2018-11-13 | 2019-03-19 | 文露 | A kind of environmental protection household garbage processing unit |
| CN111437970A (en) * | 2020-04-10 | 2020-07-24 | 商丘工学院 | Concrete waste recovery device for civil engineering |
| CN112808399A (en) * | 2019-11-15 | 2021-05-18 | 新沂新南资源综合利用技术研究院有限公司 | Screening and storing device for recycling solid waste resources |
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| DE19619411A1 (en) * | 1996-05-14 | 1997-11-20 | Werner Zink | Machine for treatment of mineral material e.g. stone for tiles |
| CN205392950U (en) * | 2016-03-02 | 2016-07-27 | 上海腾玉节能科技有限公司 | Take quick return mechanism's industrial chemicals swing screening device |
| CN106269490A (en) * | 2016-10-31 | 2017-01-04 | 王秀珠 | A kind of many precision integral type vibrations screening machine |
| CN205929535U (en) * | 2016-08-23 | 2017-02-08 | 李明扬 | Kitchen garbage processing device |
| CN207204318U (en) * | 2017-08-31 | 2018-04-10 | 洛阳市方德新材料科技有限公司 | Multistage wet grinding slurry treatment device |
| CN208527232U (en) * | 2018-05-04 | 2019-02-22 | 新乡市东振机械制造有限公司 | It is a kind of multistage building waste screening use vibrating screen |
-
2018
- 2018-05-04 CN CN201810422329.5A patent/CN108325832A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19619411A1 (en) * | 1996-05-14 | 1997-11-20 | Werner Zink | Machine for treatment of mineral material e.g. stone for tiles |
| CN205392950U (en) * | 2016-03-02 | 2016-07-27 | 上海腾玉节能科技有限公司 | Take quick return mechanism's industrial chemicals swing screening device |
| CN205929535U (en) * | 2016-08-23 | 2017-02-08 | 李明扬 | Kitchen garbage processing device |
| CN106269490A (en) * | 2016-10-31 | 2017-01-04 | 王秀珠 | A kind of many precision integral type vibrations screening machine |
| CN207204318U (en) * | 2017-08-31 | 2018-04-10 | 洛阳市方德新材料科技有限公司 | Multistage wet grinding slurry treatment device |
| CN208527232U (en) * | 2018-05-04 | 2019-02-22 | 新乡市东振机械制造有限公司 | It is a kind of multistage building waste screening use vibrating screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109482300A (en) * | 2018-11-13 | 2019-03-19 | 文露 | A kind of environmental protection household garbage processing unit |
| CN112808399A (en) * | 2019-11-15 | 2021-05-18 | 新沂新南资源综合利用技术研究院有限公司 | Screening and storing device for recycling solid waste resources |
| CN111437970A (en) * | 2020-04-10 | 2020-07-24 | 商丘工学院 | Concrete waste recovery device for civil engineering |
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Application publication date: 20180727 |
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