CN108160442B - Sand screening device for civil engineering - Google Patents
Sand screening device for civil engineering Download PDFInfo
- Publication number
- CN108160442B CN108160442B CN201711214977.3A CN201711214977A CN108160442B CN 108160442 B CN108160442 B CN 108160442B CN 201711214977 A CN201711214977 A CN 201711214977A CN 108160442 B CN108160442 B CN 108160442B
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- Prior art keywords
- box body
- screen
- motor
- side wall
- fixed
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Classifications
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/02—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
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- 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
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a sand screening device for civil engineering, which comprises a box body, a feed hopper, a feed channel, a breaking device, a sand sliding plate, a first spring, a sand and stone rotating fan, a first screen, a second spring, a third motor, a disc, a movable rod, a cross rod, a vertical rod and a knocking ball, wherein the breaking device comprises a first motor, a stirring shaft and a breaking rod, and the sand and stone rotating fan comprises a second motor, a mounting shaft, a fan plate and a hot air blower. The screening efficiency is improved.
Description
Technical Field
The invention relates to the technical field of civil engineering equipment, in particular to a sand screening device for civil engineering.
Background
Along with the development of economy and the rapid development of science and technology, people's standard of living is also being progressively improved, the construction of country is also in quick going on, in real life, house, road and bridge are all in a large amount of constructions, these engineering are collectively called civil engineering, can use the grit in civil engineering's work progress, but the size of the grit that needs sometimes is different, consequently just need the screening plant to sieve the grit, the most that use at the job site is the screening sand device, but present screening sand device sieve sand efficiency is lower, the shakeout speed is very fast, lead to the screening insufficient, and generally only have one-level screening sand function.
Disclosure of Invention
The invention aims to provide a sand screening device for civil engineering to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a sand sieving device for civil engineering comprises a box body, a first screen and a second screen, wherein supporting legs are fixed at four corners of the bottom of the box body, a first outlet is arranged in the middle of the bottom of the box body, a feed hopper is arranged at the upper left part of the box body, a feed passage is connected at the bottom of the feed hopper, the other end of the feed passage is communicated with an inner cavity of the box body, a smashing device is arranged in the feed passage and comprises a first motor, a stirring shaft and smashing rods, the first motor is arranged on the right side wall of the feed passage, an output shaft of the first motor is connected with the stirring shaft through a shaft coupling, the left end of the stirring shaft is rotatably connected with the inner wall at the left side of the feed passage through a bearing seat, a plurality of groups of smashing rods are fixed on the surface of the stirring shaft at equal intervals, a sand sliding plate is hinged below the smashing device, the sand-stone rotating fan is arranged in the box body right below the feeding channel and comprises a second motor, an installation shaft, fan plates and an air heater, an output shaft of the second motor is fixedly connected with the installation shaft through a coupler, the installation shaft is rotatably installed in the box body, the rear end of the installation shaft penetrates through the rear side wall of the box body and extends to the outside of the box body, a plurality of fan plates are fixed on the circumferential surface of the shaft section in the box body at equal intervals, the fan plates and the installation shaft are hollow, inner cavities of the fan plates and the installation shaft are communicated, an air pipe penetrates through the rear end of the installation shaft and is rotatably connected with the installation shaft through a bearing, the other end of the air pipe is connected with the air heater, a plurality of air injection holes are uniformly formed in the installation shaft between the two fan plates and in equal intervals on the surfaces of the fan plates, a filter screen is installed in each air, the right end of the first screen is hinged with the right side inner wall of the box body, the right end of the first screen is positioned on the right side wall of the box body and is provided with a second discharge port, a second screen is arranged below the first screen, the right high and left low of the second screen are obliquely arranged, the left end of the second screen is hinged with the left side inner wall of the box body, the left end of the second screen is positioned on the left side wall of the box body and is provided with a third discharge port, meshes of the first screen are larger than meshes of the second screen, second springs are fixed at the other ends of the first screen and the second screen, which are far away from a hinge joint, the other ends of the second springs are connected with a fixed block, elastic connecting belts are respectively connected between the other ends of the first screen and the second screen, which are far away from the hinge joint, and the inner wall of the box body, the elastic connecting belts are made of, be fixed with the cylindric lock on the disc leading flank, set up on the movable rod with cylindric lock complex lead to the groove, the guide bar is all worn to be equipped with at both ends about the movable rod, the movable rod left side wall is fixed with the horizontal pole, the horizontal pole other end runs through the box right side wall and extends to in the box, the horizontal pole other end is fixed with the montant, both ends all are fixed with about the montant and strike the ball, two are struck the ball and are contacted in first screen cloth bottom and second screen cloth upper portion respectively from top to bottom.
As a further scheme of the invention: the second motor is arranged on the front side wall of the box body.
As a further scheme of the invention: the air heater is fixedly arranged on the rear side wall of the box body.
As a further scheme of the invention: the fixed block is fixed on the side wall of the box body.
As a further scheme of the invention: the guide rod is fixed on the right side wall of the box body.
Compared with the prior art, the invention has the beneficial effects that: the invention is provided with a breaking device, the breaking device comprises a first motor, a stirring shaft and a breaking rod, the first motor drives the stirring rod to rotate, the stirring rod drives the breaking rod to rotate, the breaking rod breaks agglomerated graved gravels to avoid insufficient screening, the breaking device is provided with a sand sliding plate and a first spring, the sand sliding plate is matched with the first spring to slow down the falling speed of the gravels to avoid the insufficient screening caused by too fast falling of the gravels, the breaking device is provided with a gravels rotating fan, the gravels rotating fan comprises a second motor, a mounting shaft, a fan plate and a hot air blower, the second motor drives the mounting shaft to rotate, the mounting shaft drives the fan plate to rotate the gravels downwards, the insufficient screening caused by too fast falling speed is further avoided, meanwhile, the hot air blower conveys hot air into an air pipe to enter the mounting shaft, the hot air is sprayed out from air holes on the surfaces of the mounting shaft and the fan plate to dry the gravels, and wet, be equipped with first screen cloth, the second screen cloth, the third motor, the disc, the movable rod, horizontal pole and ball of strikeing, can carry out multistage screening, can filter simultaneously and divide the grit of piling different particle diameters, the third motor drives the disc and rotates, the disc passes through the cylindric lock and drives the movable rod side-to-side motion with the cooperation that leads to the groove, the movable rod drives the horizontal pole side-to-side motion, the horizontal pole drives the ball side-to-side motion of strikeing through the montant, it rocks about first screen cloth and the second screen cloth through driving with the cooperation of second spring to strike the ball, the screening efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of a sand sieving device for civil engineering.
Fig. 2 is an enlarged view of a portion a in fig. 1.
FIG. 3 is a schematic structural view of a sand-to-sand fan in the sand screening device for civil engineering. .
In the figure: 1-box body, 2-feeding channel, 3-feeding hopper, 4-breaking device, 5-sand-sliding plate, 6-first spring, 7-fan plate, 8-second motor, 9-elastic connecting belt, 10-second spring, 11-fixing block, 12-first screen, 13-third discharge hole, 14-second screen, 15-supporting leg, 16-first discharge hole, 17-knocking ball, 18-cross bar, 19-guide bar, 20-disc, 21-motor, 22-movable bar, 23-second discharge hole, 24-through groove, 25-hot air blower, 26-air pipe, 27-air jet hole and 28-cylindrical pin.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, in the embodiment of the invention, a sand sieving device for civil engineering comprises a box body 1, a first screen 12 and a second screen 14, wherein supporting legs are fixed at four corners of the bottom of the box body 1, a first outlet 16 is arranged in the middle of the bottom of the box body 1, a feed hopper 3 is arranged at the upper left part of the box body 1, a feed channel 2 is connected to the bottom of the feed hopper 3, the other end of the feed channel 2 is communicated with an inner cavity of the box body 1, a smashing device 4 is arranged in the feed channel 2, the smashing device 4 comprises a first motor, a stirring shaft and smashing rods, the first motor is arranged on the right side wall of the feed channel 2, an output shaft of the first motor is connected with the stirring shaft through a coupling, the left end of the stirring shaft is rotatably connected with the inner wall at the left side of the feed channel 2 through a bearing seat, a plurality of groups of smashing rods, the smashing rod smashes caked gravels to avoid insufficient screening, the inner walls at two sides of the feeding channel 2 are respectively hinged with a sand sliding plate 5 below the smashing device 4, a first spring 6 is fixed in the middle of the bottom of the sand sliding plate 5, the other end of the first spring 6 is fixedly connected with the side wall of the feeding channel 2, the sand sliding plate 5 is matched with the first spring 6 to slow down the falling speed of the gravels to avoid the insufficient screening caused by the too fast falling of the gravels, a gravel rotating fan is arranged in the box body 1 under the feeding channel 2 and comprises a second motor 8, an installation shaft, a fan plate 7 and a hot air fan 25, the second motor 8 is arranged on the front side wall of the box body 1, the output shaft of the second motor 8 is fixedly connected with the installation shaft through a coupler, the installation shaft is rotatably arranged in the box body 1, the rear end of the installation shaft penetrates through the rear side wall of the box body 1 and extends to the outside of the box body 1, a, the fan plates 7 and the mounting shaft are hollow and communicated with each other, the rear end of the mounting shaft is penetrated with an air pipe 26, the air pipe is rotatably connected with the mounting shaft through a bearing, the other end of the air pipe is connected with the air heater 25, the air heater 25 is fixedly mounted on the rear side wall of the box body 1, a plurality of air injection holes 27 are uniformly formed in the mounting shaft between the two fan plates 7 and on the surfaces of the fan plates 7 at equal intervals, a filter screen is mounted in the air injection holes 27, the diameter of meshes of the filter screen is smaller than that of gravels, the second motor 8 and the air heater 25 are started, the mounting shaft is driven by the second motor 8 to rotate, the fan plates 7 are driven by the mounting shaft to rotate, the gravels are rotated downwards, insufficient screening caused by too high falling speed is further avoided, meanwhile, the air heater 25 conveys hot air into the air pipe 26 and then enters the mounting shaft, the hot air is sprayed out through the, a first screen 12 is arranged at the upper part of the inner cavity of the box body 1, the first screen 12 is arranged in a manner of inclining from high to low, the right end of the first screen 12 is hinged with the inner wall at the right side of the box body 1, the right end of the first screen 12 is arranged at the right side wall of the box body 1 and is provided with a second discharge hole 23, a second screen 14 is arranged below the first screen 12, the second screen 14 is arranged in a manner of inclining from high to low from right, the left end of the second screen 14 is hinged with the inner wall at the left side of the box body 1, the left end of the second screen 14 is arranged at the left side wall of the box body 1 and is provided with a third discharge hole 13, the meshes of the first screen 12 are larger than the meshes of the second screen 14, the other ends of the first screen 12 and the second screen 14, which are far away from the hinge joint, are both fixed with a second spring 10, the other end of the second spring 10 is, the elastic connecting belt 9 is made of rubber, sand and stones are prevented from falling from gaps between the first screen 12 and the second screen 14 and the inner wall of the box body 1, a third motor 21 is arranged on the right side wall of the box body 1 below the second discharge port 23, a disc 20 is arranged on an output shaft of the third motor 21, a movable rod 22 is connected to the front side of the disc 20 in a matching way, a cylindrical pin 28 is fixed to the front side of the disc 20, a through groove 24 matched with the cylindrical pin 28 is formed in the movable rod 22, guide rods 19 are respectively arranged at the upper end and the lower end of the movable rod 22 in a penetrating way, the guide rods 19 are fixed to the right side wall of the box body 1, a cross rod 18 is fixed to the left side wall of the movable rod 22, the other end of the cross rod 18 penetrates through the right side wall of the box body 1 and extends into the box body 1, a vertical rod is fixed to the other end of the cross rod 18, the third motor 21 is started, the third motor 21 drives the disc 20 to rotate, the disc 20 drives the movable rod 22 to move left and right through the matching of the cylindrical pin 28 and the through groove 24, the movable rod 22 drives the cross rod 18 to move left and right, the cross rod 18 drives the knocking ball 17 to move left and right through the vertical rod, the knocking ball 17 drives the first screen 12 and the second screen 14 to rock up and down through the matching with the second spring 10, and the screening efficiency is improved.
The working principle of the invention is as follows: when the invention is used, the first motor is started, the second motor 8, the third motor 21 and the hot air blower 25 are started, firstly, gravel is added into the feed hopper 3, the first motor drives the stirring rod to rotate, the stirring rod drives the crushing rod to rotate, the crushing rod crushes the caked gravel, influence on screening is avoided, the gravel falls onto the slip plate 5 after crushing, the slip plate 5 slows down the falling speed of the gravel by matching with the first spring 6, insufficient screening caused by too fast falling of the gravel is avoided, then the gravel falls between the two fan plates 7, the second motor 8 drives the installation shaft to rotate, the installation shaft drives the fan plates 7 to rotate, the gravel is rotated downwards, further, insufficient screening caused by too fast falling speed is avoided, meanwhile, the hot air blower 25 conveys hot air into the air pipe 26 and then enters the installation shaft, the air jet holes on the surfaces of the installation shaft and the fan plates are sprayed, the gravel is dried, wet sand is prevented from influencing engineering use, the gravels fall on the first screen 12, the gravels smaller than the mesh diameter of the first screen 12 fall on the second screen 12, the gravels larger than the mesh diameter of the first screen 12 are directly discharged from the second discharge port 23, similarly, the gravels smaller than the mesh diameter of the second screen 14 are discharged from the first outlet 16, the gravels larger than the mesh diameter of the second screen 12 are directly discharged from the third discharge port 13, multi-stage screening is carried out, gravels with different particle sizes can be simultaneously screened and placed in piles, which is convenient for meeting different engineering requirements, meanwhile, the third motor 21 drives the disc 20 to rotate, the disc 20 drives the movable rod 22 to move left and right through the matching of the cylindrical pin 28 and the through groove 24, the movable rod 22 drives the cross rod 18 to move left and right, the cross rod 18 drives the knocking ball 17 to move left and right through the vertical rod, and the knocking ball 17 drives the first screen 12 and the second screen 14 to shake up and down through the matching with the second spring 10, so that the screening efficiency is improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. A sand screening device for civil engineering comprises a box body (1), a first screen (12) and a second screen (14), and is characterized in that supporting legs are fixed at four corners of the bottom of the box body (1), a first outlet (16) is arranged in the middle of the bottom of the box body (1), a feed hopper (3) is arranged at the upper left part of the box body (1), a feed channel (2) is connected to the bottom of the feed hopper (3), the other end of the feed channel (2) is communicated with an inner cavity of the box body (1), a crushing device (4) is arranged in the feed channel (2), the crushing device (4) comprises a first motor, a stirring shaft and crushing rods, the first motor is arranged on the right side wall of the feed channel (2), an output shaft of the first motor is connected with the stirring shaft through a shaft coupling, the left end of the stirring shaft is rotatably connected with the left inner wall of the feed channel (2, the inner walls of two sides of the feeding channel (2) are positioned below the smashing device (4) and are hinged with sand sliding plates (5), a first spring (6) is fixed in the middle of the bottom of each sand sliding plate (5), the other end of each first spring (6) is fixedly connected with the side wall of the feeding channel (2), a sand rotating fan is arranged in the box body (1) under the feeding channel (2) and comprises a second motor (8), a mounting shaft, fan plates (7) and a hot air fan (25), an output shaft of the second motor (8) is fixedly connected with the mounting shaft through a shaft coupling, the mounting shaft is rotatably arranged in the box body (1), the rear end of the mounting shaft penetrates through the rear side wall of the box body (1) and extends to the outside of the box body (1), a plurality of fan plates (7) are fixed on the surface of a shaft section in the box body (1) in a circumferential equidistant manner, the fan plates (7) are hollow inside and communicated with the inner cavities of the, the trachea passes through the bearing and is connected with installation hub rotation, and the trachea other end is connected with air heater (25), install epaxial position between two fan boards (7) and fan board (7) surface equidistance evenly to seted up a plurality of fumaroles (27), install the filter screen in fumarole (27), the mesh diameter of filter screen is less than the grit diameter, box (1) inner chamber upper portion is installed first screen cloth (12), first screen cloth (12) high right low slope setting in the left side, first screen cloth (12) right-hand member is articulated with box (1) right side inner wall, first screen cloth (12) right-hand member is located and is equipped with second discharge gate (23) on box (1) right side wall, first screen cloth (12) below is equipped with second screen cloth (14), second screen cloth (14) high right left low slope setting in the right side, second screen cloth (14) left end is articulated with box (1) left side inner wall, second screen cloth (14) left end is located and is equipped with third discharge gate (13) on box (, the mesh of the first screen (12) is larger than that of the second screen (14), the other ends of the first screen (12) and the second screen (14) far away from the hinged point are both fixed with a second spring (10), the other end of the second spring (10) is connected with a fixed block (11), the other ends of the first screen (12) and the second screen (14) far away from the hinged point and the inner wall of the box body (1) are both connected with an elastic connecting belt (9), the elastic connecting belt (9) is made of rubber, a third motor (21) is arranged on the right side wall of the box body (1) below the second discharge port (23), a disc (20) is arranged on an output shaft of the third motor (21), a movable rod (22) is connected on the front side of the disc (20) in a matched manner, a cylindrical pin (28) is fixed on the front side of the disc (20), a through groove (24) matched with the cylindrical pin (28) is formed in the, guide rods (19) are arranged at the upper end and the lower end of each movable rod (22) in a penetrating mode, a cross rod (18) is fixed to the left side wall of each movable rod (22), the other end of each cross rod (18) penetrates through the right side wall of the box body (1) and extends into the box body (1), a vertical rod is fixed to the other end of each cross rod (18), knocking balls (17) are fixed to the upper end and the lower end of each vertical rod, and the upper knocking balls (17) and the lower knocking balls (17) are in contact with the upper portion of the first screen (12) and the.
2. Sand screening device for civil engineering according to claim 1, characterized in that the second electric motor (8) is mounted on the front side wall of the box (1).
3. Sand sieving device for civil engineering according to claim 1, characterized in that said hot-air blower (25) is fixedly mounted on the rear side wall of the box (1).
4. The sand screening device for civil engineering work according to claim 1, characterized in that the fixing block (11) is fixed to the side wall of the box body (1).
5. Sand screening device for civil engineering according to claim 1, characterized in that the guide bar (19) is fixed to the right side wall of the box (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711214977.3A CN108160442B (en) | 2017-11-28 | 2017-11-28 | Sand screening device for civil engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711214977.3A CN108160442B (en) | 2017-11-28 | 2017-11-28 | Sand screening device for civil engineering |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108160442A CN108160442A (en) | 2018-06-15 |
| CN108160442B true CN108160442B (en) | 2021-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711214977.3A Active CN108160442B (en) | 2017-11-28 | 2017-11-28 | Sand screening device for civil engineering |
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| Country | Link |
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| CN (1) | CN108160442B (en) |
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| CN114347199B (en) * | 2022-03-21 | 2022-06-24 | 联合优发生物质能源徐州有限公司 | Biomass particle raw material manufacturing bamboo wood crushing equipment |
| CN115849794B (en) * | 2022-12-01 | 2024-01-26 | 中建八局第四建设有限公司 | Low-cost coarse aggregate UHPC and production equipment thereof |
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| CN205110128U (en) * | 2015-11-10 | 2016-03-30 | 仲健维 | High -efficient ore sorter |
| CN206661322U (en) * | 2017-02-13 | 2017-11-24 | 李丽芳 | One kind building sand sieving machine |
| CN107282250A (en) * | 2017-07-11 | 2017-10-24 | 侯添有 | A kind of medical Chinese medicinal herbs becomes more meticulous lapping device |
| CN107377176A (en) * | 2017-07-20 | 2017-11-24 | 刘占超 | A kind of chemical products processing screening plant |
| CN107279332A (en) * | 2017-07-24 | 2017-10-24 | 银川金帮手信息科技有限公司 | A kind of drying tea leaves screen selecting and separating mechanism |
| CN107282421A (en) * | 2017-07-25 | 2017-10-24 | 康泽波 | A kind of municipal construction sand screening plant |
| CN107252765A (en) * | 2017-07-31 | 2017-10-17 | 合肥多智科技开发有限公司 | The husky equipment of the classifying screen of construction |
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