CN105772395A - Double-mass vertical vibration anti-resonance screen - Google Patents
Double-mass vertical vibration anti-resonance screen Download PDFInfo
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- CN105772395A CN105772395A CN201610309378.9A CN201610309378A CN105772395A CN 105772395 A CN105772395 A CN 105772395A CN 201610309378 A CN201610309378 A CN 201610309378A CN 105772395 A CN105772395 A CN 105772395A
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- plastid
- exciting
- vibration
- screen cloth
- spring
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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
- B07B1/34—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens jigging or moving to-and-fro perpendicularly or approximately perpendiculary to the plane of the screen
- B07B1/343—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens jigging or moving to-and-fro perpendicularly or approximately perpendiculary to the plane of the screen with mechanical drive elements other than electromagnets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
A double-mass vertical vibration anti-resonance screen comprises an upper mass and a lower mass, wherein the upper mass comprises a screen and a screen connecting rack matched with the screen; the screen is fixed on the screen connecting rack; the middle of the screen is high while two ends of the screen are low or the two ends of the screen are high while the middle of the screen is low; the lower mass comprises a vibration excitation box, a vibration excitation spring assembly and a vibration exciter; the vibration excitation box is connected with the upper mass through the vibration excitation spring assembly, and is connected with a foundation through an isolation spring assembly; and when the double-mass vertical vibration anti-resonance screen works normally, the upper mass vibrates in the vertical direction under the effect of the vibration exciter.
Description
Technical field
The present invention relates to the technical field of vibrosieve equipment, particularly a kind of double mass vertical vibration antiresonance sieve.
Background technology
Screening plant is visual plant necessary to the industrial departments such as mine, ore dressing, coal separation, building materials, steam power plant, chemical industry, and the quality of its performance will directly affect production capacity and the technical-economic index of these industries.
At present, domestic and international vibrosieve is substantially all the employing far super resonance technique of elemental body and is designed research and development.There is technological deficiency in elemental body vibrosieve: 1. due to the far super resonant frequency of vibrosieve operating frequency, required exciting force is relatively larger, and power consumption is also relatively larger in practice principle；2. vibrosieve starts and has to pass through resonance region in stopping process, and amplitude when crossing resonance region is 4～7 times of working amplitude, and vibration equipment is big; cause that operation is unstable, it is easy to damaging, simultaneous faults rate is higher; add maintenance cost, reduce work efficiency, decrease service life；3. when vibrosieve works, amplitude can reduce along with the increase of feed, in order to meet production and application requirement, it is necessary to often adjusts exciting force according to feeding coal to keep vibrosieve amplitude.For tradition elemental body vibrosieve, its mass of vibration and exciting force are the relations of conflict, the big then required exciting force of mass of vibration is big, exciting force then increases greatly the thickness of component again to guarantee its intensity, thus causing the increase of mass of vibration, it is unfavorable for that vibrosieve develops to direction heavy, extra-duty.
nullApplication number a kind of anti-resonance vibrating sifter that has been the patent disclosure of 200810012489.9，It includes: screen box is upper plastid、Excitor is lower plastid、Main vibration spring、Vibrator、Isolation spring、Basis、Motor etc.，On screen box, plastid is anti-resonance vibrating sifter working portion，Under excitor, plastid is drive part，Equipped with vibrator on excitor，It is connected by main vibration spring between screen box and excitor，Excitor is seated on basis by isolation spring，Motor is arranged on motor rack，And be connected with vibrator by power transmission shaft，But screen box one end is high in the above application、One end low dip is arranged，Screen box vibrates along the direction vertical with compass screen surface，Make the poor stability that screen box vibrates，Additionally，Material runs from one end that screen box is high to low one end，The wear condition of screen box diverse location is inconsistent，The stability influence that screen box is vibrated by the material on screen box is bigger，Here it is the deficiencies in the prior art part.
Summary of the invention
The technical problem to be solved, it is simply that the deficiency existing for prior art, and a kind of double mass vertical vibration antiresonance sieve is provided, its simple in construction is ingenious.
This programme is achieved by the following technical measures: a kind of double mass vertical vibration antiresonance sieve, including upper plastid, lower plastid and vibrator,
Described upper plastid includes screen cloth and the screen cloth link coordinated with screen cloth, and described screen cloth is fixed on screen cloth link, and in the middle part of described screen cloth, high two ends are low or high middle part, two ends is low；
Described lower plastid includes exciting case and exciting vibration spring assembly；
Described exciting case is connected with upper plastid by exciting vibration spring assembly, and described exciting case is connected with basis by isolation spring assembly；
During normal operation, under the effect of vibrator, described upper plastid vibrates in vertical direction.
On the basis of technique scheme, it is also possible to have further technical scheme:
Preferably, ωa=(0.95-1.05) ω wherein, ωaFor the frequency of vibration of upper plastid, ω is the frequency of vibration of vibratork2For the global stiffness of exciting vibration spring assembly, m2Mass of vibration for upper plastid.
Adopting the technical program, under resonance state, screen cloth vibration is stable.
Preferably, described upper plastid is symmetrical structure.
Preferably, described upper plastid is all symmetrical on fore-and-aft direction and left and right directions.Adopt the technical program, when material sieves, the quality of the material entering two ends, screen cloth left and right and rear and front end is suitable, therefore on screen cloth, the quality of material is less on the impact of the mass of vibration of whole upper plastid, and the wear condition of two ends, screen cloth left and right and rear and front end is suitable, substantially synchronization vertical vibration is realized, it is ensured that the uniformity of upper mass vibrating and stability.
Preferably, described exciting vibration spring assembly includes organizing exciting vibration spring more.Adopt the technical program, increase the exciting force dispersion that vibrator is produced by the stress point of upper plastid, the service life of plastid in raising by exciting vibration spring assembly.
Preferably, described exciting vibration spring is arranged symmetrically with along the vertical line through upper plastid barycenter or is evenly arranged.Adopt the technical program so that exciting force uniform and stable suffered by upper plastid, be further ensured that the stability of mass vibrating.
Preferably, described isolation spring assembly includes organizing isolation spring more.Adopt the technical program, increase the exciting force dispersion that vibrator is produced by the stress point of upper plastid, the service life of plastid in raising by exciting vibration spring assembly.
Preferably, described isolation spring is arranged symmetrically with along the vertical line through upper plastid barycenter or is evenly arranged.Adopt the technical program, be further ensured that the stability of mass vibrating.
Preferably, also including the limit assembly connecting plastid and lower plastid, described limit assembly is for retraining plastid and the relative motion of lower plastid so that upper plastid and lower plastid only produce the relative motion in vertical direction.Adopt the technical program, stop is set and ensure that the stability of mass vibrating in startup and stopped process, also can reduce the situation owing to causing upper mass vibrating instability on screen cloth left and right directions and fore-and-aft direction owing to material is uneven in addition.
Preferably, described limit assembly includes least one set stop, and described stop includes symmetrically arranged limiting plate, and one end of described limiting plate is connected with exciting case, and the other end is connected with screen cloth link.
Preferably, described limiting plate is resin plate or metal steel strap.
Preferably, described exciting vibration spring includes the spring I, dividing plate and the spring II that are arranged in exciting case, described spring I is between exciting box plate and dividing plate, described spring II is between dividing plate and exciting roof box, described dividing plate is fixedly connected with connection axle, described connection axle passes exciting case and fixing with upper plastid is connected, and described spring I and spring II are in compressive state all the time.
Preferably, described vibrator is arranged on exciting case.Adopt the technical program, vibrator is arranged on exciting case, the mass of vibration of upper plastid can be reduced, needing exciting force to reduce therewith, reduce energy resource consumption, exciting case is not by the impact of screen cloth and screen cloth link, convenient design, additionally, exciting case vibrates hardly, it is easy to ensure the requirement of rigidity and intensity.
Preferably, along exciting force produced by the vibrator at the vertical line two ends of plastid barycenter in process on plastid barycenter produce moment equal in magnitude, in opposite direction.
Preferably, described vibrator is arranged symmetrically with along the vertical line through upper plastid barycenter, and described vibrator is driven the exciting force produced in vertical direction by motor, and the exciting force that corresponding vibrator produces is identical, and turning to of corresponding motor is contrary.
Preferably, described upper plastid also includes the stock guide being arranged on below screen cloth, and the minus mesh that described screen cloth sifts out is discharged through stock guide.
Preferably, the cross section of described screen cloth is V-structure or reverse V-shaped structure.
Preferably, described exciting case is connected with screen cloth link by exciting vibration spring assembly.
Beneficial effects of the present invention is appreciated that from above-mentioned technical scheme: a kind of double mass vertical vibration antiresonance sieve, including upper plastid, lower plastid and vibrator, described upper plastid includes screen cloth and the screen cloth link coordinated with screen cloth, described screen cloth is fixed on screen cloth link, and in the middle part of described screen cloth, high two ends are low or high middle part, two ends is low；Described lower plastid includes exciting case and exciting vibration spring assembly；Described exciting case is connected with upper plastid by exciting vibration spring assembly, and described exciting case is connected with basis by isolation spring assembly；During normal operation, under the effect of vibrator, described upper plastid vibrates in vertical direction.
The technical program overall structure is simple, screen cloth is designed as the middle part version that high two ends are low or high middle part, two ends is low cleverly, when high two ends, the middle part of screen cloth are low, from middle part charging, two ends discharging in the present invention；When the low two ends height in the middle part of screen cloth, from two endfeeds, middle part discharging, solve in prior art the defect that screen box one end is high, one end is low, and improve the screening efficiency of screen cloth；Under the effect of vibrator, upper plastid vibrates in vertical direction, whole screen cloth is effectively vibrated, there is not the vibration on other direction, facilitate the connection between each parts, improve the service life of whole screen cloth, be provided with screen cloth link, in convenience the installation of plastid and lower plastid be connected.
As can be seen here, the present invention compared with prior art, has prominent substantive distinguishing features and significant progressive, and the beneficial effect of its enforcement is also apparent from.
Accompanying drawing explanation
In order to be illustrated more clearly that technical scheme, the accompanying drawing used required in describing will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of embodiment 1；
Fig. 2 is that the B of Fig. 1 is to structural representation；
Fig. 3 is the partial enlargement structural representation in A portion in Fig. 1；
Fig. 4 is the structural representation of embodiment 2；
Fig. 5 is that the B of Fig. 4 is to structural representation；
Fig. 6 is the partial enlargement structural representation in A portion in Fig. 4.
In figure: 1-screen cloth, 2-screen cloth link, 3-exciting case, 4-limiting plate, 5-exciting vibration spring, 5.1-spring I, 5.2-dividing plate, 5.3-connects axle, 5.4-spring II, 5.5-locking member, 6-isolation spring, 7-basis, 8-motor, 9-shaft coupling, 10-vibrator, 11-stock guide, 12-baffle plate.
Detailed description of the invention
For making the goal of the invention of the present invention, feature, the advantage can be more obvious and understandable; specific embodiment and accompanying drawing will be used below; the technical scheme of present invention protection is clearly and completely described; obviously; the embodiments described below are only a part of embodiment of the present invention, and not all embodiment.Based on the embodiment in this patent, all other embodiments that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of this patent protection.
Embodiment 1
In order to solve in prior art, screen box one end in anti-resonance vibrating sifter is high, low the brought defect in one end, screen cloth is designed as reverse V-shaped version that high two ends, middle part are low in the present embodiment cleverly, from middle part charging, two ends discharging；So that whole screen cloth effectively vibrates, vibrator makes plastid vibrate in vertical direction；So that the stability of upper mass vibrating so that upper plastid and lower plastid reach resonance state, in order to convenient upper plastid and lower plastid installation be connected, be provided with screen cloth link, specific as follows:
As Figure 1-3, a kind of double mass vertical vibration antiresonance sieve, including upper plastid and lower plastid, described upper plastid includes screen cloth 1 and the screen cloth link 2 coordinated with screen cloth 1, and described screen cloth 1 is fixed on screen cloth link 2, and in the middle part of described screen cloth 1, high two ends are low；Described lower plastid includes exciting case 3, exciting vibration spring assembly and the vibrator 10 being arranged on exciting case 3；Described exciting case 3 is connected with upper plastid by exciting vibration spring assembly, and described exciting case 3 is connected with basis 7 by isolation spring assembly；During normal operation, under the effect of vibrator 10, described upper plastid vibrates in vertical direction, and ωa=(0.95-1.05) ω, wherein, ωaFor the frequency of vibration of upper plastid, ω is the frequency of vibration of vibrator 10k2For the global stiffness of exciting vibration spring assembly, m2Mass of vibration for upper plastid.
Further, in order to reduce the impact on upper mass vibrating of material on screen cloth 1 further, the upper plastid in the present embodiment is symmetrical structure on fore-and-aft direction and left and right directions.
Further, the service life of plastid in raising, the stress point of upper plastid is disperseed, exciting vibration spring assembly in the present embodiment includes many group exciting vibration springs 5, described exciting vibration spring 5 is arranged symmetrically with along the vertical line through upper plastid barycenter, described exciting vibration spring includes the spring I 5.1 being arranged in exciting case, dividing plate 5.2 and spring II 5.4, described spring I 5.1 is between exciting case 3 base plate and dividing plate 5.2, described spring II 5.4 is between dividing plate 5.2 and exciting case 3 top board, described dividing plate 5.2 is fixedly connected with connection axle 5.3, described connection axle 5.3 passes exciting case 3 and fixing with the screen cloth link 2 in upper plastid is connected, described spring I 5.1 and spring II 5.4 are in compressive state all the time.
Further, in order to ensure the stability of antiresonance sieve vibration, the isolation spring assembly in the present embodiment includes many group isolation springs 6, and described isolation spring 6 is arranged symmetrically with along the vertical line through upper plastid barycenter.
Further, start and the rocking and due to uneven due to material on screen cloth 1 left and right directions and fore-and-aft direction and that cause upper mass vibrating unstable situation of upper plastid in stopped process to reduce antiresonance sieve, in the present embodiment, it is additionally provided with the two groups of stops connecting upper plastid and lower plastid, often group stop includes symmetrically arranged two limiting plates 4, one end of described limiting plate is connected with exciting case 3, and the other end is connected with screen cloth link 2.Described limiting plate can be selected for resin plate or metal steel strap, it is preferred that spacing plate level is installed.
Further, vibrator 10 in the present embodiment is arranged symmetrically with along the vertical line through upper plastid barycenter, described vibrator 10 is driven the exciting force produced in vertical direction by motor 8, and the exciting force that corresponding vibrator 10 produces is identical, and turning to of corresponding motor 8 is contrary.
Further, the upper plastid in the present embodiment also includes the stock guide 11 being arranged on below screen cloth 1, and the minus mesh that described screen cloth 1 sifts out is discharged through stock guide 11.
Embodiment 2
It is different in that with above-described embodiment, as Figure 4-Figure 6, low in the middle part of the height of described screen cloth 1 two ends, during work, from two endfeeds, middle part discharging, described screen cloth 1 end is provided with the baffle plate 13 for separating oversize and minus mesh.
In this specification, each embodiment adopts the mode gone forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, identical similar portion reference mutually between each embodiment.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.The multiple amendment of these embodiments be will be apparent from for those skilled in the art, and generic principles defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention is not intended to be limited to the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and features of novelty, creationary feature.
Claims (10)
1. a double mass vertical vibration antiresonance sieve, including upper plastid, lower plastid and vibrator, is characterized in that:
Described upper plastid includes screen cloth and the screen cloth link coordinated with screen cloth, and described screen cloth is fixed on screen cloth link, and in the middle part of described screen cloth, high two ends are low or high middle part, two ends is low；
Described lower plastid includes exciting case and exciting vibration spring assembly；
Described exciting case is connected with upper plastid by exciting vibration spring assembly, and described exciting case is connected with basis by isolation spring assembly；
During normal operation, under the effect of vibrator, described upper plastid vibrates in vertical direction.
2. double mass vertical vibration antiresonance according to claim 1 sieve, is characterized in that: ωa=(0.95-1.05) ω, wherein, ωaFor the frequency of vibration of upper plastid, ω is the frequency of vibration of vibrator,k2For the global stiffness of exciting vibration spring assembly, m2For the mass of vibration on upper plastid.
3. double mass vertical vibration antiresonance according to claim 1 and 2 sieve, is characterized in that: described upper plastid is symmetrical structure；Preferably, described upper plastid is all symmetrical on fore-and-aft direction and left and right directions.
4. double mass vertical vibration antiresonance according to claim 1 and 2 sieve, is characterized in that: described exciting vibration spring assembly includes organizing exciting vibration spring more；Preferably, described exciting vibration spring is arranged symmetrically with along the vertical line through upper plastid barycenter or is evenly arranged；Preferably, described isolation spring assembly includes organizing isolation spring more；Preferably, described isolation spring is arranged symmetrically with along the vertical line through upper plastid barycenter or is evenly arranged.
5. double mass vertical vibration antiresonance according to claim 1 and 2 sieve, it is characterized in that: also include the limit assembly connecting plastid and lower plastid, described limit assembly is for retraining plastid and the relative motion of lower plastid so that upper plastid and lower plastid only produce the relative motion in vertical direction.
6. double mass vertical vibration antiresonance according to claim 5 sieve, it is characterized in that: described limit assembly includes least one set stop, described stop includes symmetrically arranged limiting plate, and one end of described limiting plate is connected with exciting case, and the other end is connected with screen cloth link；Preferably, described limiting plate is resin plate or metal steel strap.
7. double mass vertical vibration antiresonance according to claim 3 sieve, it is characterized in that: described exciting vibration spring includes the spring I, dividing plate and the spring II that are arranged in exciting case, described spring I is between exciting box plate and dividing plate, described spring II is between dividing plate and exciting roof box, described dividing plate is fixedly connected with connection axle, described connection axle passes exciting case and fixing with upper plastid is connected, and described spring I and spring II are in compressive state all the time.
8. the double mass vertical vibration antiresonance sieve according to Claims 2 or 3 or 4 or 5, is characterized in that: described vibrator is arranged on exciting case；Preferably, along exciting force produced by the vibrator at the vertical line two ends of plastid barycenter in process on plastid barycenter produce moment equal in magnitude, in opposite direction；Preferably, described vibrator is arranged symmetrically with along the vertical line through upper plastid barycenter, and described vibrator is driven the exciting force produced in vertical direction by motor, and the exciting force that corresponding vibrator produces is identical, and turning to of corresponding motor is contrary.
9. the double mass vertical vibration antiresonance sieve according to claim 1 or 2 or 3 or 4 or 5, is characterized in that: described upper plastid also includes the stock guide being arranged on below screen cloth, and the minus mesh that described screen cloth sifts out is discharged through stock guide.
10. the double mass vertical vibration antiresonance sieve according to claim 1 or 2 or 3 or 4 or 5, is characterized in that: the cross section of described screen cloth is V-structure or reverse V-shaped structure；Preferably, described exciting case is connected with screen cloth link by exciting vibration spring assembly.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106925509A (en) * | 2017-04-27 | 2017-07-07 | 济南中燃科技发展有限公司 | A kind of anti-resonance vibrating sifter |
| CN106944339A (en) * | 2017-05-08 | 2017-07-14 | 济南中燃科技发展有限公司 | Compass screen surface can floated vibratory sieve and method for sieving during one kind work |
| CN107570406A (en) * | 2017-09-13 | 2018-01-12 | 长兴贝塔新型装饰材料有限公司 | A kind of color sand vibratory sieve |
| CN108325615A (en) * | 2018-04-25 | 2018-07-27 | 肇庆益晟商贸有限公司 | A kind of grinding device of bio-medical material standby raw material turntable structure |
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| CN108686816A (en) * | 2018-05-15 | 2018-10-23 | 合肥龙之韵医药技术有限公司 | A kind of grinding device of bio-medical material standby raw material elastic piece structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106944339A (en) * | 2017-05-08 | 2017-07-14 | 济南中燃科技发展有限公司 | Compass screen surface can floated vibratory sieve and method for sieving during one kind work |
| CN107570406A (en) * | 2017-09-13 | 2018-01-12 | 长兴贝塔新型装饰材料有限公司 | A kind of color sand vibratory sieve |
| CN108325615B (en) * | 2018-04-25 | 2020-01-17 | 信阳农林学院 | A crushing device with a raw material turntable structure for the preparation of biomedical materials |
| CN108543569A (en) * | 2018-04-25 | 2018-09-18 | 肇庆益晟商贸有限公司 | A kind of grinding device of bio-medical material standby raw material elastic piece structure |
| CN108325615A (en) * | 2018-04-25 | 2018-07-27 | 肇庆益晟商贸有限公司 | A kind of grinding device of bio-medical material standby raw material turntable structure |
| CN108686816A (en) * | 2018-05-15 | 2018-10-23 | 合肥龙之韵医药技术有限公司 | A kind of grinding device of bio-medical material standby raw material elastic piece structure |
| CN109499695A (en) * | 2018-12-17 | 2019-03-22 | 东北大学 | A kind of multimachine drives the parameter determination method of large-scale high-frequency vibration grinding machine |
| CN109649966A (en) * | 2018-12-17 | 2019-04-19 | 东北大学 | A kind of two-shipper motor synchronizing drives three mass vibration feeders and its parameter determination method |
| CN109649965A (en) * | 2018-12-17 | 2019-04-19 | 东北大学 | A kind of parameter determination method of four machine of subresonance double mass driving vibrosieve conveyer |
| CN113731800A (en) * | 2021-09-09 | 2021-12-03 | 合肥金果缘视觉科技有限公司 | High-efficiency longitudinal vibrating screen |
| CN113731800B (en) * | 2021-09-09 | 2023-06-30 | 合肥金果缘视觉科技有限公司 | High-efficiency longitudinal vibrating screen |
| CN118305079A (en) * | 2024-06-07 | 2024-07-09 | 四川远方云天食品科技有限公司 | Hot pot seasoning raw materials sieving mechanism |
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