CN105170444A - Grading type screening plant used for screening haycite - Google Patents
Grading type screening plant used for screening haycite Download PDFInfo
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- CN105170444A CN105170444A CN201510482645.8A CN201510482645A CN105170444A CN 105170444 A CN105170444 A CN 105170444A CN 201510482645 A CN201510482645 A CN 201510482645A CN 105170444 A CN105170444 A CN 105170444A
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Abstract
The invention provides a grading type screening plant used for screening haycite, and belongs to the technical field of building material machining. The problems that meshes of an existing haycite screen are prone to being blocked, the earpiece screening tension is insufficient, and the using stability is not high are solved. The grading type screening plant used for screening the haycite comprises a rack, a plurality of rotary screens which are sequentially connected in series and a motor used for driving the rotary screens to rotate; the rack comprises a first support used for supporting the rotary screens and a second support used for supporting the motor; and the mesh sizes of the rotary screens are all different, the mesh sizes of the rotary screens connected in series are sequentially increased from back to front, the rotary screen located at the backmost end is connected with the motor, the rotary screens are coaxially arranged, adjacent rotary screens are fixedly connected, and a receiving hopper is connected to the lower portion of each rotary screen. By means of the grading type screening plant, grading screening can be carried out, and the meshes are not prone to being blocked.
Description
Technical field
The invention belongs to building material technology, relate to a kind of screening plant, particularly a kind of stagewise screening plant for screening haydite.
Background technology
Building materials industry is Chinese important material industry.Building material product comprises construction material and goods, nonmetallic ore and goods, new inorganic non-metallic materials three is main kind of, is widely used in the fields such as building, military project, environmental protection, new high-tech industry and people's lives.China has been construction material producing country maximum in the world and country of consumption.Main building material product cement, plate glass, construction sanitary ceramic, stone material and materials for wall Isoquant rank first in the world for many years, meanwhile, building material product quality improves constantly, and the energy and raw materials consumption decline year by year, various building material continues to bring out, and building material product constantly upgrades.As the haydite of one of building materials, as the term suggests be exactly the particle of ceramic, there is density low, corrosion-resistant, the advantages such as frost resistance is good, the fields such as extensive use and building materials, gardening, chemical industry, oil.Rounded or the oval-shaped ball of external appearance characteristic major part of haydite, surface is the hard shell of one deck, and this layer of shell be ceramic or enamel, has the effect of water proof guarantor gas, and gives haydite higher intensity.Because different application occasion needs the haydite of different size, therefore need to sieve haydite.Current haydite screening is manually carried out mostly step by step, our company is for above-mentioned situation, once have submitted a patent application [license number: CN203356043U] on June 9th, 2013, disclose a kind of screening plant of haydite, it comprises a support body, support body is fixed with the barrel that several upper and lower two ends all have opening, several barrels are arranged in order and the height of upper end open end face successively decreases successively, a flase floor is fixed with in the upper end open of several barrels, flase floor is arranged along barrel upper end open end slope, and grate opening on flase floor becomes large from top to bottom gradually along the incline direction of flase floor, barrel is also fixed with vibrating motor.The screening plant of this haydite can sieve the haydite of different size, but the sieve aperture of haydite sieve easily blocks, and needs often to clear up, not only inefficiency, and wastes time and energy.
Summary of the invention
The object of the invention is to there are the problems referred to above for existing technology, propose a kind of stagewise screening plant for screening haydite, it can carry out sizing screening, and its sieve aperture not easily blocks.
Object of the present invention realizes by following technical proposal: a kind of stagewise screening plant for screening haydite, it is characterized in that, comprise frame, several rotary screens be connected in series successively and the motor for driving rotary screen to rotate, described frame comprises the bearing one for back-up roller shaft screen and the bearing two for support motor, the mesh size of each rotary screen is all not identical, and the mesh size of each rotary screen of serial connection increases back to front successively, the rotary screen being positioned at rearmost end is connected with motor, each rotary screen concentric is arranged, and be connected mutually between adjacent two rotary screens, the below of each described rotary screen is all connected with a receiving hopper.
In the technical program, each rotary screen is connected in series successively and is fixed together, the rotary screen being positioned at rearmost end is the first order, driven by motor first order rotary screen rotates, and rotary screen at different levels can drive the secondary one-level rotary screen be positioned on front side of it to rotate successively, make each rotary screen of being serially connected can coaxial rotation, thus the sizing screening realized haydite, overturn in rotary screen due to haydite simultaneously and roll, the haydite be stuck in sieve aperture can be ejected, sieve pore blockade can be prevented, in addition, in this screening plant between other rotary screen and motor without direct annexation, but rotated by another rotary screen drive of this rotary screen rear end, structure is simpler, when haydite can also be avoided to rotate in rotary screen simultaneously, the rotary screen supporting construction that may exist is collided, cause haydite damaged or cause damage to supporting construction, fully can ensure the integrality of haydite.
Above-mentioned for screening in the stagewise screening plant of haydite, described screening plant also comprises one and is arranged on motor and the connecting ring between the rotary screen of rearmost end, described connecting ring comprises one and is made as circular ring body and is positioned at the connecting axle of ring body center, described ring body is used for being connected mutually with the rotary screen being positioned at rearmost end, described connecting axle is positioned at ring body center, and be connected by some spokes between connecting axle and ring body, be connected by shaft coupling and reductor between described connecting axle and the motor shaft of motor.Because connecting ring and rotary screen are connected mutually, when driven by motor connecting ring rotates, rotary screen can rotate along with connecting ring, after motor via reducer reduction rotating speed, make the rotating speed of rotary screen relatively slow, effectively can avoid thing to be sieved because rotation is too fast and directly jump to the larger rotary screen of mesh size by the rotary screen that mesh size is less, guaranteeing that the screening of this screening plant is meticulousr.Be demountable structure between connecting ring and rotary screen, make the dismounting of this screening plant convenient, be convenient to cleaning and maintenance, the rotary screen of different mesh size can also be selected as required as the first order simultaneously, and connecting ring and this rotary screen are connected mutually.
Above-mentioned for screening in the stagewise screening plant of haydite, rotary screen described in each includes front retainer plate, rear retainer plate and the screen cloth being enclosed to form tubulose, the front end of described screen cloth is connected on front retainer plate, the rear end of screen cloth is connected on rear retainer plate, described front retainer plate have several front contiguous blocks, described front contiguous block line circular array centered by the axial line of rotary screen is evenly arranged, described rear retainer plate have several and front contiguous block position rear contiguous block one to one, in adjacent two rotary screens, be connected by dismountable securing member between contiguous block and the rear contiguous block of the rotary screen in front end before the rotary screen of rear end.Dismountable securing member can be bolt, screw or alignment pin, and demountable structure makes each rotary screen can carry out free collocation as required, namely in haydite size more as a child, relatively can reduce the rank of rotary screen, save energy consumption, improve screening efficiency.
Above-mentioned for screening in the stagewise screening plant of haydite, there is between described rear retainer plate and front retainer plate several strip connecting rods along the distribution of rotary screen circumference, the axis of described connecting rod and the axis of rotary screen consistent.One end of connecting rod is connected on front retainer plate, and the other end of connecting rod is connected on rear retainer plate.Connecting rod can strengthen the overall construction intensity of each rotary screen, and rotary screen can be avoided to be distorted in rotation process distortion.
Above-mentioned for screening in the stagewise screening plant of haydite, described connecting rod is positioned at the outside of screen cloth.Connecting rod is placed in outside screen cloth, can either avoids causing interference to haydite, affect screening effect, outside can be carried out to the screen cloth of rotary screen again spacing, avoid by haydite clashes into and deform.
Above-mentioned for screening in the stagewise screening plant of haydite, described bearing one comprises the support bar for supporting and is positioned at the supporting seat of support bar top, described supporting seat has upwards uncovered and for setting up rotary screen circular arc mounting groove, the internal face of described mounting groove has several roll shafts along the distribution of mounting groove circumference, the axis of described roll shaft and the axis of rotary screen consistent.Rotary screen is erected on supporting seat, is non-fixing mechanism, be convenient to dismounting, and rotary screen freely can rotates on mounting groove under the position-limiting action of motor between rotary screen and supporting seat, can not deviate from easily again owing to there is left and right skew.
Above-mentioned for screening in the stagewise screening plant of haydite, described supporting seat is connected with the clasp of an arc-shaped, one end of described clasp is hinged on a side channel of supporting seat, and the other end of clasp has the fastener that can removably connect with the opposite side of supporting seat.After clasp is connected with supporting seat, can carries out spacing to rotary screen, avoid rotary screen to offset in rotation process, because clasp can, relative to mounting groove folding, be convenient to clear up rotary screen and safeguard.
Above-mentioned for screening in the stagewise screening plant of haydite, described screening plant also comprises the dust cover being arranged on rotary screen top.Dust cover can hide the dust that haydite concussion produces, and can also avoid haydite and damage staff simultaneously.
Above-mentioned for screening in the stagewise screening plant of haydite, described rotary screen is all obliquely installed, and there is angle α between rotary screen axial line and horizontal plane, and the scope of described angle α is 0 ° of < α <5 °.There is between rotary screen and horizontal plane a relatively little inclination angle, can either make haydite in rotary screen in screening process, can be slipped to gradually by the rotary screen that mesh size is less in the relatively large next stage rotary screen of mesh size, haydite landing in screening process can be avoided again too fast and make damaged more and affect screening effect.
Above-mentioned for screening in the stagewise screening plant of haydite, described screening plant also comprise front end for being connected to the rotary screen be positioned at foremost uncovered on seal cover.Seal cover be connected to by removable syndeton the front end of the rotary screen be positioned at foremost uncovered on, the haydite not carrying out sieving can be avoided to be jumped out by vibration in the rotary screen tilted.
Compared with prior art, the present invention has following advantage:
1, after haydite enters screening plant, because mesh size increases back to front gradually, can sieve step by step haydite;
2, overturn in rotary screen due to haydite and roll, the haydite be stuck in sieve aperture can being ejected, preventing sieve pore blockade;
3, be connected by demountable structure between each rotary screen, clear up and safeguard more convenient and quicker, can also carry out combination collocation according to the actual conditions of material to the rotary screen with different mesh size, practicality is better simultaneously;
4, by arranging seal cover and dust cover, can ensure that haydite is sieved fully, dust can be reduced again and protect workman not receive the haydite injury of splashing.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of connecting ring in the present invention.
Fig. 3 is the structural representation of intermediate roll of the present invention sieve.
Fig. 4 is the connection diagram of intermediate roll of the present invention sieve and rotary screen and rotary screen and connecting ring.
Fig. 5 is the structural representation of another form rotary screen in the present invention.
Fig. 6 is the connection diagram of intermediate roll of the present invention sieve and bearing one.
Fig. 7 is A place enlarged drawing in Fig. 6.
Fig. 8 is the connection diagram of rotary screen in the present invention in embodiment two and bearing one.
Fig. 9 is the connection diagram of rotary screen in the present invention in embodiment three and bearing one.
In figure, 1, rotary screen; 11, front retainer plate; 111, front contiguous block; 12, rear retainer plate; 121, rear contiguous block; 13, screen cloth; 14, connecting rod; 2, motor; 3, bearing one; 31, support bar; 32, supporting seat; 321, mounting groove; 33, roll shaft; 34, clasp; 341, fastener; 4, bearing two; 5, receiving hopper; 6, reductor; 7, shaft coupling; 8, connecting ring; 81, ring body; 82, connecting axle; 83, spoke; 9, seal cover; 10, dust cover.
Detailed description of the invention
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.
Embodiment one:
With reference to Fig. 1, the present embodiment is a kind of stagewise screening plant for screening haydite, comprise frame, three rotary screens be connected in series successively 1 and the motor 2 for driving rotary screen 1 to rotate, frame comprises four bearings 1 for back-up roller shaft screen 1 and a bearing 24 for support motor 2, screen cloth 13 aperture of each rotary screen 1 is all not identical, and screen cloth 13 aperture of each rotary screen 1 of serial connection increases back to front successively, the rotary screen 1 being positioned at rearmost end is connected with motor 2, each rotary screen 1 concentric is arranged, and be connected mutually between adjacent two rotary screens 1, the below of each rotary screen 1 is all connected with a receiving hopper 5.Each rotary screen 1 is connected in series successively and is fixed together, the rotary screen 1 being positioned at rearmost end is the first order, motor 2 drives first order rotary screen 1 to rotate, and rotary screen 1 at different levels can drive the secondary one-level rotary screen 1 be positioned on front side of it to rotate successively, make each rotary screen 1 of being serially connected can coaxial rotation, thus the sizing screening realized haydite, in addition, in this screening plant between other rotary screen 1 and motor 2 without direct annexation, but rotated by another rotary screen 1 drive of this rotary screen 1 rear end, structure is simpler, when haydite can also be avoided to rotate in rotary screen 1 simultaneously, rotary screen 1 supporting construction that may exist is collided, cause haydite damaged or cause damage to supporting construction.In the present embodiment, bearing 1 is all arranged on the below of the connecting portion of two rotary screens 1, and can not cause covering to the sieve aperture of rotary screen 1 upper screen cloth 13.In the present embodiment, rotary screen 1 is all obliquely installed, angle α is there is between rotary screen 1 axial line and horizontal plane, the scope of angle α is 0 ° of < α <5 °, there is between rotary screen 1 and horizontal plane a relatively little inclination angle, can either make haydite in rotary screen 1 in screening process, can be slipped to gradually by the rotary screen 1 that mesh size is less in the relatively large next stage rotary screen 1 of mesh size, haydite landing in screening process can be avoided again too fast and affect screening effect.The front end being positioned at rotary screen 1 foremost is also removably connected with a seal cover 9, seal cover 9 be connected to by removable syndeton the front end of the rotary screen 1 be positioned at foremost uncovered on, the haydite not carrying out sieving can be avoided to jump out by vibrating in the rotary screen 1 tilted.
Specific as follows, composition graphs 3 and Fig. 4, each rotary screen 1 includes front retainer plate 11, rear retainer plate 12 and the screen cloth 13 being enclosed to form tubulose, the front end of screen cloth 13 is connected on front retainer plate 11, the rear end of screen cloth 13 is connected on rear retainer plate 12, front retainer plate 11 have several front contiguous blocks 111, front contiguous block 111 line circular array centered by the axial line of rotary screen 1 is evenly arranged, rear retainer plate 12 have several and front contiguous block 111 position rear contiguous block 121 one to one, in adjacent two rotary screens 1, before the rotary screen 1 of rear end, contiguous block 111 is connected by dismountable securing member with between the rear contiguous block 121 of the rotary screen 1 of front end.Dismountable securing member can be bolt, screw or alignment pin, and demountable structure makes each rotary screen can carry out free collocation as required, namely in haydite size more as a child, relatively can reduce the rank of rotary screen 1, save energy consumption, improve screening efficiency.
Composition graphs 2 and Fig. 4, this screening plant also comprises one and is arranged on motor 2 and the connecting ring 8 between the rotary screen 1 of rearmost end, connecting ring 8 comprises one and is made as circular ring body 81 and is positioned at the connecting axle 82 of ring body 81 center, ring body 81 is for being connected mutually with the rotary screen 1 being positioned at rearmost end, connecting axle 82 is positioned at ring body 81 center, and be connected by some spokes 83 between connecting axle 82 and ring body 81, be connected by shaft coupling 7 and reductor 6 between the motor shaft of connecting axle 82 and motor 2.Because connecting ring 8 and rotary screen 1 are connected mutually, when motor 2 drives connecting ring 8 to rotate, rotary screen 1 can rotate along with connecting ring 8, after motor 2 reduces rotating speed by reductor 6, make the rotating speed of rotary screen 1 relatively slow, effectively can avoid thing to be sieved because rotation is too fast and directly jump to the larger rotary screen of mesh size 1 by the rotary screen 1 that mesh size is less, guaranteeing that the screening of this screening plant is meticulousr.The ring body 81 of connecting ring 8 is connected with the rear contiguous block 121 of the rotary screen 1 being positioned at rearmost end mutually by securing members such as dismountable bolt, screws, and spoke 83 and rear contiguous block 121 position one_to_one corresponding, bonding strength and transmission efficiency can be ensured.Above-mentioned design can make the connection of connecting ring 8 and rotary screen 1 more firm, make the dismounting of this screening plant convenient simultaneously, be convenient to cleaning and maintenance, the rotary screen 1 of different mesh size can also be selected as required as the first order simultaneously, and connecting ring 8 and this rotary screen 1 are connected mutually.
With reference to Fig. 5, in order to improve the structural strength of rotary screen 1, the strip connecting rod 14 that several are axially arranged along rotary screen 1 can be provided with between the rear retainer plate 12 of rotary screen 1 and front retainer plate 11, and connecting rod 14 is positioned at the outside of screen cloth 13.Connecting rod 14 can strengthen the overall construction intensity of each rotary screen 1, rotary screen 1 can be avoided to be distorted in rotation process distortion, connecting rod 14 is placed in outside screen cloth 13, can either avoid causing interference to haydite, affect screening effect, outside can be carried out to the screen cloth 13 of rotary screen 1 again spacing, avoid by haydite clashes into and deform.
Composition graphs 6 and Fig. 7, bearing 1 comprises the support bar 31 for supporting and is positioned at the supporting seat 32 at support bar 31 top, supporting seat 32 has upwards uncovered and for setting up rotary screen 1 circular arc mounting groove 321, and the internal face of mounting groove 321 has several roll shafts 33 axially arranged along rotary screen 1.In the present embodiment, connecting rod 14 and rear contiguous block 121 position one_to_one corresponding.Rotary screen 1 is erected on supporting seat 32, is non-fixing mechanism, be convenient to dismounting, and rotary screen 1 freely can rotates on mounting groove 321 under the position-limiting action of motor 2 between rotary screen 1 and supporting seat 32, can not deviate from easily again owing to there is left and right skew.
Embodiment two:
Composition graphs 8, the structure of the present embodiment two is substantially identical with embodiment one, difference is, supporting seat 32 is connected with the clasp 34 of an arc-shaped, one end of clasp 34 is hinged on the side cell wall of mounting groove 321, and the other end of clasp 34 is by having the fastener 341 that can removably connect with the opposite side cell wall of mounting groove 321.After clasp 34 is connected with supporting seat 32, can carry out spacing to rotary screen 1 further, avoid rotary screen 1 skew occurs in rotation process or beats, and can, relative to mounting groove 321 folding, be convenient to clear up rotary screen 1 and safeguard due to clasp 34.
Embodiment three:
Composition graphs 9, the structure of the present embodiment three is substantially identical with embodiment one, and difference is, rotary screen 1 top is also coated with the dust cover 10 that is made as arc-shaped.Dust cover 10 can hide the dust that haydite concussion produces, and can also avoid haydite and damage staff simultaneously.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (10)
1. one kind for screening the stagewise screening plant of haydite, it is characterized in that, comprise frame, several rotary screens be connected in series successively (1) and the motor (2) for driving rotary screen (1) to rotate, described frame comprises the bearing one (3) for back-up roller shaft screen (1) and the bearing two (4) for support motor (2), screen cloth (13) aperture of each rotary screen (1) is all not identical, and screen cloth (13) aperture of each rotary screen (1) of serial connection increases back to front successively, the rotary screen (1) being positioned at rearmost end is connected with motor (2), each rotary screen (1) concentric is arranged, and be connected mutually between adjacent two rotary screens (1), the below of each described rotary screen (1) is all connected with a receiving hopper (5).
2. the stagewise screening plant for screening haydite according to claim 1, it is characterized in that, described screening plant also comprises one and is arranged on connecting ring (8) between motor (2) and the rotary screen (1) being positioned at rearmost end, described connecting ring (8) comprises one and is made as circular ring body (81) and is positioned at the connecting axle (82) of ring body (81) center, described ring body (81) is for being connected mutually with the rotary screen (1) being positioned at rearmost end, described connecting axle (82) is positioned at ring body (81) center, and be connected by some spokes (83) between connecting axle (82) and ring body (81), be connected by shaft coupling (7) and reductor (6) between the motor shaft of described connecting axle (82) and motor (2).
3. the stagewise screening plant for screening haydite according to claim 1, it is characterized in that, rotary screen described in each (1) includes front retainer plate (11), rear retainer plate (12) and be enclosed to form the screen cloth (13) of tubulose, the front end of described screen cloth (13) is connected on front retainer plate (11), the rear end of screen cloth (13) is connected on rear retainer plate (12), described front retainer plate (11) have several front contiguous blocks (111), described front contiguous block (111) line circular array centered by the axial line of rotary screen (1) is evenly arranged, described rear retainer plate (12) have several and front contiguous block (111) position rear contiguous block (121) one to one, in adjacent two rotary screens (1), the front contiguous block (111) being positioned at the rotary screen (1) of rear end is connected by dismountable securing member with between the rear contiguous block (121) of the rotary screen (1) being positioned at front end.
4. the stagewise screening plant for screening haydite according to claim 3, it is characterized in that, have between described rear retainer plate (12) and front retainer plate (11) several along rotary screen (1) circumference distribution strip connecting rod (14), the axis of described connecting rod (14) and the axis of rotary screen (1) consistent.
5. the stagewise screening plant for screening haydite according to claim 4, is characterized in that, described connecting rod (14) is positioned at the outside of screen cloth (13).
6. the stagewise screening plant for screening haydite according to claim 1, it is characterized in that, described bearing one (3) comprises the support bar (31) for supporting and is positioned at the supporting seat (32) at support bar (31) top, described supporting seat (32) has upwards uncovered and for setting up rotary screen (1) circular arc mounting groove (321), the internal face of described mounting groove (321) has several roll shafts (33) distributed along mounting groove (321) circumference, the axis of described roll shaft (33) and the axis of rotary screen (1) consistent.
7. the stagewise screening plant for screening haydite according to claim 6, it is characterized in that, described supporting seat (32) is connected with the clasp (34) of an arc-shaped, one end of described clasp (34) is hinged on the side of supporting seat (32), and the other end of clasp (34) has the fastener (341) that can removably connect with the opposite side of supporting seat (32).
8. according to the stagewise screening plant for screening haydite in claim 1-7 described in any, it is characterized in that, described rotary screen (1) is all obliquely installed, there is angle α in rotary screen (1), the scope of described angle α is 0 ° of < α <5 ° between axial line and horizontal plane.
9. according to the stagewise screening plant for screening haydite in claim 1-7 described in any, it is characterized in that, described screening plant also comprise front end for being connected to the rotary screen (1) be positioned at foremost uncovered on seal cover (9).
10. according to the stagewise screening plant for screening haydite in claim 1-7 described in any, it is characterized in that, described screening plant also comprises the dust cover (10) being arranged on rotary screen (1) top.
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| CN201510482645.8A CN105170444B (en) | 2015-08-07 | 2015-08-07 | A kind of stagewise screening plant for screening haydite |
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| CN110813699A (en) * | 2019-12-19 | 2020-02-21 | 徐州铭创自动化科技有限公司 | Mining multistage drum sieve |
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| CN112934693A (en) * | 2021-02-02 | 2021-06-11 | 格林美(武汉)城市矿山产业集团有限公司 | Self-cleaning drum screen |
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| CN204470049U (en) * | 2015-01-29 | 2015-07-15 | 营口洪亮机械发展有限公司 | The novel cage that rolls sieves |
| CN204953290U (en) * | 2015-08-07 | 2016-01-13 | 浙江方远建材科技有限公司 | A hierarchical formula screening plant for screening haydite |
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| CN106914407A (en) * | 2017-04-17 | 2017-07-04 | 安徽农业大学 | A kind of drum-type fresh leaf screening machine for tea making |
| CN106914407B (en) * | 2017-04-17 | 2023-03-14 | 安徽农业大学 | Drum-type fresh leaf screening machine for tea making |
| CN107989376A (en) * | 2017-12-26 | 2018-05-04 | 三汽车制造有限公司 | Sieve and hopper |
| CN107989376B (en) * | 2017-12-26 | 2023-08-25 | 三一汽车制造有限公司 | Screen and hopper |
| CN108380503A (en) * | 2018-02-05 | 2018-08-10 | 宁波松科磁材有限公司 | A kind of automation vacuum melting rapid-hardening flake chip select equipment |
| CN110813699A (en) * | 2019-12-19 | 2020-02-21 | 徐州铭创自动化科技有限公司 | Mining multistage drum sieve |
| CN112275612A (en) * | 2020-10-26 | 2021-01-29 | 曹瑛 | Iron ore edulcoration separator |
| CN112934693A (en) * | 2021-02-02 | 2021-06-11 | 格林美(武汉)城市矿山产业集团有限公司 | Self-cleaning drum screen |
| CN113953172A (en) * | 2021-11-16 | 2022-01-21 | 苏州华佑信息科技有限公司 | Screening plant is used in electronic material research and development |
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