CN114950929B - Lime production and processing device with screening function - Google Patents

Lime production and processing device with screening function Download PDF

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Publication number
CN114950929B
CN114950929B CN202210540806.4A CN202210540806A CN114950929B CN 114950929 B CN114950929 B CN 114950929B CN 202210540806 A CN202210540806 A CN 202210540806A CN 114950929 B CN114950929 B CN 114950929B
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China
Prior art keywords
plate
screen
screening
barrel
lime
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CN202210540806.4A
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Chinese (zh)
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CN114950929A (en
Inventor
佘宝福
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Shanxi Xinghuo Hengyuan Industry And Trade Co ltd
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Shanxi Xinghuo Hengyuan Industry And Trade Co ltd
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Priority to CN202210540806.4A priority Critical patent/CN114950929B/en
Publication of CN114950929A publication Critical patent/CN114950929A/en
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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
    • B07B1/08—Screens rotating within their own plane
    • 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
    • B07B1/50—Cleaning
    • B07B1/52—Cleaning with brushes or scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
    • B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills

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  • Combined Means For Separation Of Solids (AREA)

Abstract

The invention relates to a lime production and processing device with a screening function, belongs to the technical field of lime production equipment, and solves the technical problem that the existing lime processing device is not ideal in lime and stone screening effect. The device comprises a screening barrel, wherein the top of the screening barrel is bolted with a barrel cover, the center of the barrel cover is rotationally connected with a connecting shaft and extends into the screening barrel, and a feed inlet is formed in the barrel cover; the motor is arranged on the barrel cover; the screen plate and the screen mesh are fixedly connected to the connecting shaft, a plurality of through holes are formed in the screen plate, and protruding blocks are arranged on the surface of the screen plate; a first outlet and a second outlet are formed in the side wall of the screening barrel, the first outlet is positioned above the screen plate, the second outlet is positioned between the screen plate and the screen mesh, and a door plate is connected to the barrel wall of the screening barrel; the lower part of the screening barrel is provided with a slot, and the receiving slot is spliced in the slot. Therefore, the lime production and processing device with the screening function provided by the invention screens lime by using the screen plate and the screen mesh, and the screening effect is better.

Description

Lime production and processing device with screening function
Technical Field
The invention belongs to the technical field of lime production equipment, and particularly relates to a lime production and processing device with a screening function.
Background
Lime is obtained by calcining natural rock of calcium carbonate at high temperature, decomposing the calcium carbonate into calcium oxide and carbon dioxide at high temperature, and discharging the carbon dioxide. In the calcining process, the temperature difference exists between the inside and the outside of the rock, so that the surface layer of the rock is thoroughly calcined, the calcining effect is not added at the center of the rock to form stone cores, the stone cores do not form lime, and the stone cores are actually stone blocks with larger hardness.
At present, when lime is processed by a lime production and processing device, in order to screen out stone cores, products obtained after calcination are usually separated from stone blocks/stone cores by a screen, and the lime is separated from the stone blocks/stone cores by the screen.
Disclosure of Invention
The invention provides a lime production and processing device with a screening function, which is used for solving the technical problem that the existing lime processing device is not ideal in lime and stone screening effect.
The invention is realized by the following technical scheme: lime production processingequipment with screening function, characterized by, include:
the top of the screening barrel is bolted with a barrel cover, the center of the barrel cover is rotationally connected with a connecting shaft, the connecting shaft stretches into the screening barrel, and a feed inlet is further formed in the barrel cover;
the motor is arranged on the barrel cover and connected with the connecting shaft to drive the connecting shaft to rotate;
the screen plate and the screen mesh are fixedly connected to the connecting shaft, the screen mesh is positioned below the screen plate, the outer edges of the screen plate and the screen mesh are respectively attached to the inner wall of the screening barrel, a plurality of through holes are uniformly formed in the screen plate, and protruding blocks are arranged on the surface of the screen plate between every two adjacent through holes;
a first outlet and a second outlet are formed in the side wall of the screening barrel, the first outlet is located above the screen plate, the second outlet is located between the screen plate and the screen mesh, and a door plate for covering the first outlet and the second outlet is connected to the barrel wall of the screening barrel;
the lower part of the screening barrel is provided with a slot, and the receiving slot is inserted into the slot and is positioned under the screen.
Further, in order to better realize the invention, a first inclined plate and a second inclined plate are further arranged in the screening barrel, the first inclined plate and the second inclined plate are arranged in a radial inclined manner relative to the screening barrel, the first inclined plate and the second inclined plate are overlapped up and down, the first inclined plate is positioned above the screen plate, the second inclined plate is positioned between the screen plate and the screen, and a gap for lime to pass through is formed between the first inclined plate and the second inclined plate and the connecting shaft.
Further, in order to better realize the invention, the first inclined plate and the second inclined plate are fixedly connected to the side walls of the first outlet and the second outlet respectively through bolts.
Further, in order to better realize the invention, the top end and the bottom end of the second inclined plate are fixedly connected with brushes, the brushes at the top end of the second inclined plate are in contact with the bottom surface of the sieve plate, and the brushes at the bottom end of the second inclined plate are in contact with the top surface of the sieve plate.
Further, in order to better realize the invention, a feeding hopper is inserted into the feeding port, and a sealing plate for sealing the feeding hopper is hinged to the side wall of the feeding hopper.
Further, in order to better realize the invention, a controller is arranged on the outer wall of the sieving barrel, and the motors are electrically connected with the controller.
Further, in order to better realize the invention, the bottom of the receiving groove is provided with a pulley.
Further, in order to better realize the invention, a fixing frame is also arranged on the outer wall of the screening barrel.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a lime production and processing device with a screening function, which comprises a screening barrel, a motor, a screen plate, a screen and a receiving groove, wherein the top of the screening barrel is bolted with a barrel cover, the center of the barrel cover is rotationally connected with a connecting shaft, the connecting shaft stretches into the screening barrel, the barrel cover is also provided with a feed inlet for adding raw materials into the screening barrel, the motor is arranged on the barrel cover, the motor is connected with the connecting shaft to drive the connecting shaft to rotate, the screen plate and the screen plate are fixedly connected on the connecting shaft and rotate along with the connecting shaft, the screen plate is positioned below the screen plate, the outer edges of the screen plate and the screen plate are attached to the inner wall of the screening barrel, a plurality of through holes for passing lime powder are uniformly formed in the screen plate, bumps for crushing lime blocks are arranged among the through holes, the pore diameter of the screen plate is smaller than the pore diameter of the through holes of the screen plate, a first outlet and a second outlet are formed in the barrel wall of the screening barrel, the first outlet is positioned above the screen plate, the second outlet is positioned between the screen plate and the screen plate, the first outlet and the second outlet are connected on the barrel wall of the screening barrel and are used for covering the first outlet and the second outlet, the slot is positioned under the slot.
Through the structure, when the lime production and processing device with the screening function is used, lime blocks are added to the sieve plate of the screening barrel through the feed inlet, the motor rotates to drive the sieve plate and the screen to rotate, the convex blocks on the sieve plate are contacted with stone cores and rubbed, so that lime which is not easy to fall off on the surface of the stone cores is rubbed off, the lime falls onto the screen through the through holes to screen the lime again, the powdery lime falls into the receiving groove through the screen, after screening is completed, the door plate is opened, and the screen and the stone cores which are not completely decomposed on the sieve plate are discharged. Therefore, the lime production and processing device with the screening function provided by the invention has the advantages that lime is crushed and screened by using the screen plate and the screen mesh, the screen plate not only has the screening effect, but also contacts and rubs the convex blocks on the screen plate with stone cores, and the lime which is not easy to fall off from the surfaces of the stone cores is scraped, so that the screening effect of the lime production and processing device is better.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of a lime production and processing device with a screening function;
fig. 2 is a schematic view of a mounting structure of a first swash plate in an embodiment of the invention;
fig. 3 is a schematic view of the structure of a screening deck in an embodiment of the invention.
In the figure:
1-a screening barrel; 2-a barrel cover; 3-connecting shaft; 4-an electric motor; 5-sieve plates; 51-bump; 6, screening; 7-a door plate; 8-receiving grooves; 9-a first sloping plate; 10-a second sloping plate; 11-a brush; 12-feeding hopper; 13-closing plates; 14-a controller; 15-pulleys; 16-fixing frame.
Description of the embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
Examples
The invention provides a lime production and processing device with a screening function, which is used for solving the technical problem that the existing lime processing device is not ideal in lime and stone screening effect. This lime production processingequipment with divide sieve function includes screening bucket 1, motor 4, sieve 5, screen cloth 6, connects silo 8, wherein:
the top bolt of screening bucket 1 has bung 2, and bolted connection is convenient for bung 2's installation and dismantlement, dismantles bung 2 and is convenient for to the installation of screening bucket 1 inside each part, and the center rotation of bung 2 is connected with a connecting axle 3, and connecting axle 3 stretches into screening bucket 1 in, has still offered the feed inlet on the bung 2, and broken lime piece adds to screening bucket 1 through the feed inlet in.
The motor 4 is mounted on the tub cover 2, and an output shaft of the motor 4 is coupled to the coupling shaft 3 through a coupling to drive the coupling shaft 3 to rotate.
The sieve 5 and the screen cloth 6 are all fixedly connected to the connecting shaft 3, the outer edges of the sieve 5 and the screen cloth 6 are attached to the inner wall of the screening barrel 1, so that lime is prevented from passing through gaps between the sieve 5 and the inner wall of the screen cloth 6 and the inner wall of the screening barrel 1, the connecting shaft 3 can be enabled to rotate more stably, a plurality of through holes are uniformly formed in the sieve 5, bumps 51 for crushing lime powder are arranged among the through holes, stone cores which are not completely decomposed cannot be crushed and stay on the sieve 5, the screen cloth 6 is arranged below the sieve 5, the aperture of the through holes is larger than the aperture of a sieve mesh on the screen cloth 6, the sieve 5 rubs lime which is not easy to fall on the surface of blocky lime, the lime falls on the screen cloth 6 from the through holes, lime is screened again by the screen cloth 6, the screening effect on lime is better, more preferably, the bumps are rectangular, the square prism is arranged above, and the prismatic angle of the square prism has better crushing effect on lime blocks.
The side wall of the screening barrel 1 is provided with a first outlet and a second outlet, the first outlet is positioned above the screen plate 5, the second outlet is positioned between the screen plate 5 and the screen mesh 6, the barrel wall of the screening barrel 1 is connected with a door plate 7 for covering the first outlet and the second outlet, after lime screening is completed, the door plate 7 is opened, stone cores which are not completely decomposed on the screen plate 5 and the screen mesh 6 and other impurities are discharged from the first outlet and the second outlet, and the lime screening barrel is remarkable in that the door plate 7 is in a closed state when lime is screened, so that lime is prevented from flying out from the first outlet and the second outlet to cause damage to a user during screening.
The lower part of the screening barrel 1 is provided with a slot, a receiving groove 8 is spliced in the slot, lime powder screened from the screen 6 is stored in the receiving groove 8, and the receiving groove 8 is positioned under the screen 6.
Through the structure, when the lime production and processing device with screening function provided by the embodiment is used, lime blocks are added to the screen plate 5 of the screening barrel 1 through the feed inlet, the motor 4 rotates to drive the screen plate 5 and the screen plate 6 to rotate, the convex blocks 51 on the screen plate 5 are contacted with stone cores and rubbed, so that lime which is not easy to fall off on the stone cores is rubbed off, the lime falls onto the screen plate 6 through the through holes to screen the lime again, the powdery lime falls into the receiving groove 8 through the screen plate 6, after screening is completed, the door plate 7 is opened, and the stone cores which are not completely decomposed on the screen plate 6 and the screen plate 5 are discharged. Therefore, the lime production processingequipment with divide sieve function that this embodiment provided carries out broken screening with lime through using sieve 5 and screen cloth 6, and wherein sieve 5 not only can play the effect of screening, and the lug 51 on it contacts friction with stone core moreover, rubs the lime that is difficult for dropping on stone core surface, and consequently this lime production processingequipment's screening effect is better.
An alternative implementation of this embodiment is as follows: the screening barrel 1 is internally provided with the first inclined plate 9 and the second inclined plate 10, the first inclined plate 9 and the second inclined plate 10 are arranged in a radial inclined mode of the screening barrel 1, the first inclined plate 9 and the second inclined plate 10 are vertically overlapped, the first inclined plate 9 is located above the screen plate 5 and used for enabling lime blocks to be gathered towards the center of the screening barrel 1, the second inclined plate 10 is located between the screen plate 5 and the screen 6 and used for enabling lime powder to be gathered towards the center of the screening barrel 1, and when gaps for lime to pass through are formed between the first inclined plate 9 and the second inclined plate 10 and the connecting shaft 3, lime on the screen plate 5 and the screen 6 moves towards the barrel wall of the screening barrel 1 under the action of centrifugal force, the inclined plates enable lime to be gathered towards the center of the screening barrel 1 again, the screening effect on lime is better, when stone cores on the screen plate 5 and the screen 6 are discharged, the motor is reversed, the stone cores are blocked by the first inclined plate 9 and the second inclined plate 10, and stone cores are discharged more conveniently.
An alternative implementation of this embodiment is as follows: the first inclined plate 9 and the second inclined plate 10 are fixedly connected to the side walls of the first outlet and the second outlet through bolts, respectively, so that the installation of the inclined plates is more convenient after the screen plate 5 and the screen 6 are installed.
An alternative implementation of this embodiment is as follows: this lime production processingequipment with divide sieve function still includes brush 11, and the equal fixedly connected with brush 11 of upper end and the lower extreme of above-mentioned second swash plate 10, the brush 11 on second swash plate 10 top and the bottom surface contact of sieve 5, the brush 11 of second swash plate 10 bottom and the top surface contact of screen cloth 6, and when sieve 5 and screen cloth 6 rotated, brush 11 was last brushed sieve 5 and screen cloth 6, prevented that lime from blocking the sieve mesh of above-mentioned through-hole and screen cloth 6, improved the efficiency to lime screening.
An alternative implementation of this embodiment is as follows: the feeding port is inserted with the feeding hopper 12, the feeding hopper 12 is convenient for adding lime to be screened into the screening barrel 1, the side wall of the feeding hopper 12 is hinged with the sealing plate 13, and when lime is screened, the sealing plate 13 is blocked at the feeding port to prevent powder generated when lime is screened from being diffused into the air, so that the environment is polluted.
An alternative implementation of this embodiment is as follows: the outer wall of the screening barrel 1 is provided with a controller 14, the motor 4 is electrically connected with the controller 14, and the controller 14 is used for controlling the opening and closing of the motor 4, so that the screening barrel is more convenient and safer to use.
An alternative implementation of this embodiment is as follows: the pulley 15 is arranged at the bottom of the receiving groove 8, and after the receiving groove 8 is filled with lime, the pulley 15 is used for moving the receiving groove 8, so that the labor is saved and the convenience is improved.
An alternative implementation of this embodiment is as follows: the outer wall of the screening barrel 1 is also provided with the fixing frame 16, and the fixing frame 16 enables the screening barrel 1 to be fixed more stably, so that the screening barrel 1 is prevented from being toppled over to cause injury to a user in the use process.
The above description is merely an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present invention, and it is intended to cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (5)

1. Lime production processingequipment with screening function, characterized by, include:
the top of the screening barrel is bolted with a barrel cover, the center of the barrel cover is rotationally connected with a connecting shaft, the connecting shaft stretches into the screening barrel, and a feed inlet is further formed in the barrel cover;
the motor is arranged on the barrel cover and connected with the connecting shaft to drive the connecting shaft to rotate;
the screen plate and the screen mesh are fixedly connected to the connecting shaft, the screen mesh is positioned below the screen plate, the outer edges of the screen plate and the screen mesh are respectively attached to the inner wall of the screening barrel, a plurality of through holes are uniformly formed in the screen plate, and protruding blocks are arranged on the surface of the screen plate between every two adjacent through holes;
a first outlet and a second outlet are formed in the side wall of the screening barrel, the first outlet is located above the screen plate, the second outlet is located between the screen plate and the screen mesh, and a door plate for covering the first outlet and the second outlet is connected to the barrel wall of the screening barrel;
a receiving groove is formed in the lower portion of the screening barrel, and the receiving groove is inserted into the inserting groove and is located right below the screen;
the screening barrel is internally provided with a first inclined plate and a second inclined plate, the first inclined plate and the second inclined plate are arranged in a radial inclined manner, the first inclined plate and the second inclined plate are vertically overlapped, the first inclined plate is positioned above the screen plate, the second inclined plate is positioned between the screen plate and the screen mesh, a gap for lime to pass through is formed between the first inclined plate and the second inclined plate and the connecting shaft, when stone cores on the screen plate and the screen mesh are discharged, the motor is reversed, and the first inclined plate and the second inclined plate block the stone cores, so that the stone cores are discharged out of the screening barrel along the first inclined plate and the second inclined plate;
the first inclined plate and the second inclined plate are fixedly connected to the side walls of the first outlet and the second outlet through bolts respectively;
the top and the bottom of second swash plate all rigid coupling have the brush, the brush on second swash plate top with the bottom surface contact of sieve, the brush on second swash plate bottom with the top surface contact of screen cloth.
2. The lime production and processing device with a screening function according to claim 1, wherein: the feeding port is inserted with a feeding hopper, and the side wall of the feeding hopper is hinged with a sealing plate for sealing the feeding hopper.
3. The lime production and processing device with a screening function according to claim 1, wherein: and a controller is arranged on the outer wall of the screening barrel, and the motors are electrically connected with the controller.
4. The lime production and processing device with a screening function according to claim 1, wherein: the pulley is installed at the bottom of the receiving groove.
5. The lime production and processing device with a screening function according to claim 1, wherein: and a fixing frame is also arranged on the outer wall of the screening barrel.
CN202210540806.4A 2022-05-17 2022-05-17 Lime production and processing device with screening function Active CN114950929B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210540806.4A CN114950929B (en) 2022-05-17 2022-05-17 Lime production and processing device with screening function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210540806.4A CN114950929B (en) 2022-05-17 2022-05-17 Lime production and processing device with screening function

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CN114950929A CN114950929A (en) 2022-08-30
CN114950929B true CN114950929B (en) 2023-05-05

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3959672B2 (en) * 2001-10-30 2007-08-15 株式会社大竹製作所 Granule sorter
CN207288038U (en) * 2017-09-01 2018-05-01 余擎宇 A kind of grain and oil process fine screening machine
CN107744938A (en) * 2017-10-09 2018-03-02 宋萍萍 One kind building municipal administration sieves husky equipment with environment-friendly type
CN209334139U (en) * 2018-12-06 2019-09-03 武汉杰斯特重工装备有限责任公司 A kind of centrifugal screening plant
CN210253131U (en) * 2019-07-23 2020-04-07 贵港市和顺食品有限公司 Suction type specific gravity stoner for selenium-rich red rice
CN211247357U (en) * 2019-12-04 2020-08-14 西安顺通建材有限责任公司 Silt screening plant is used in concrete processing
CN211937740U (en) * 2020-03-30 2020-11-17 鄂尔多斯市蒙泰铝业有限责任公司 Aluminum ash processing device for electrolytic aluminum processing
CN212791853U (en) * 2020-07-16 2021-03-26 重庆庆华璧山混凝土有限公司 Raw material screening machine for concrete production
CN214320847U (en) * 2020-12-26 2021-10-01 郑州东方磨料磨具有限公司 Abrasive material two-stage screening plant
CN214515812U (en) * 2021-03-15 2021-10-29 成都理工大学工程技术学院 Screening device applying electronic technology

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