CN115970884A - Negative pole thick liquids edulcoration system - Google Patents
Negative pole thick liquids edulcoration system Download PDFInfo
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- CN115970884A CN115970884A CN202310011822.9A CN202310011822A CN115970884A CN 115970884 A CN115970884 A CN 115970884A CN 202310011822 A CN202310011822 A CN 202310011822A CN 115970884 A CN115970884 A CN 115970884A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a cathode slurry impurity removal system, which comprises: the stirring mechanism is used for containing and stirring the slurry; the filtering mechanism is communicated with the stirring mechanism and is used for receiving the slurry in the stirring mechanism, adsorbing magnetic impurities contained in the slurry and filtering large-particle impurities in the slurry; the filtering mechanism is internally provided with a filtering area, the filtering area is internally provided with a plurality of replaceable filtering components, the filtering components are sequentially distributed from top to bottom, and each filtering component is used for receiving the slurry above the filtering component and transmitting the slurry to the filtering component below the filtering component after impurity removal treatment. According to the method, the magnetic impurities and large-particle impurities in the slurry are adsorbed and filtered by the plurality of filtering parts, so that the quality problem caused by the magnetic impurities mixed in the slurry is avoided; moreover, a plurality of filter components can be correspondingly replaced, and the work of other filter components is not influenced in the replacement process, so that the operation without stopping the machine is ensured.
Description
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to a cathode slurry impurity removal system.
Background
The development of the new energy automobile market brings about the vigorous demand of the lithium ion battery and also brings about the fierce industry and product competition. Lithium ion battery production process, during the preparation of negative pole thick liquids, because agitating unit's stirring leaf forms for the metal material preparation, increase along with the live time of stirring, wearing and tearing can appear in the stirring leaf, and the wearing and tearing part can be sneaked into in the negative pole thick liquids, lead to sneaking into in the negative pole thick liquids has magnetic impurity, these magnetic impurity cause electric core from discharging too big, can lead to the battery short circuit and then cause the appearance of battery safety problem, the performance of electric core has seriously been influenced, so get rid of the magnetic impurity in the thick liquids and just very important.
At present, the cathode slurry of the commonly used lithium ion battery is installed in a discharge pipeline by using a magnetic filter, so that magnetic impurities in the slurry are removed, however, the iron content in the magnetic filter can be gradually increased along with the increase of the service time, and the magnetic filter needs to be replaced in time, and then the whole stirring device is stopped along with the replacement process, so that the actual production requirement is not met.
Disclosure of Invention
The invention aims to provide a cathode slurry impurity removal system and method ， The technical problem that in the prior art, the filter mechanism is not stopped during replacement is solved.
In order to achieve the purpose, the technical scheme of the invention comprises the following steps:
the invention provides a cathode slurry impurity removal system, which comprises:
the stirring mechanism is used for containing and stirring the slurry;
the filtering mechanism is communicated with the stirring mechanism and is used for receiving the slurry in the stirring mechanism, adsorbing magnetic impurities contained in the slurry and filtering large-particle impurities in the slurry;
the filtering mechanism is internally provided with a filtering area, the filtering area is internally provided with a plurality of replaceable filtering components, the filtering components are sequentially distributed and arranged from top to bottom, and each filtering component is used for receiving the slurry above the filtering component and transmitting the slurry to the filtering component below the filtering component after impurity removal treatment.
Compared with the prior art, the filter area is internally provided with the plurality of replaceable filter components, and the plurality of filter components are used for adsorbing and filtering magnetic impurities and large-particle impurities in the slurry, so that the quality problem caused by the magnetic impurities mixed in the slurry is avoided; moreover, a plurality of filter components can be correspondingly replaced, the work of other filter components cannot be influenced in the replacement process, and the filter mechanism can be ensured to continuously operate, so that the non-stop operation is ensured.
In one embodiment, the plurality of filter elements are divided into two groups, and the number of filter elements in each group is the same;
when one of the filter groups is within the filtration zone, then part or all of the other filter group is outside the filtration zone.
In one embodiment, when one of the filter groups is located in the filter zone, a transition zone is provided between two adjacent filter elements, and the transition zone is used for accommodating one filter element of the other filter group.
In one embodiment, the filter mesh number of the filter elements of another group of the filter groups located in the transition zone is the same as the filter mesh number of the filter elements above or below the filter group.
In one embodiment, the filter element comprises:
a housing having a feed inlet at an upper end of the housing and a discharge outlet at a lower end of the housing;
a partition plate provided in the housing to partition the housing into a chamber to be filtered and a chamber to be filtered;
the cavity to be filtered is communicated with the feed inlet, and the filtered cavity is communicated with the discharge outlet; the partition plate is provided with a plurality of filter holes.
In one embodiment, the caliber of the discharge hole is smaller than that of the feed hole;
the discharge hole is located the lower extreme of casing and be close to left side or right side setting.
In one embodiment, in the same group of the filter groups, the discharge ports of the filter parts are arranged on the same side; and is arranged at the opposite side of the discharge port of the filter component of the other filter group.
In one embodiment, a magnetic adsorption surface is arranged on the lower side of the filtered cavity, and the magnetic adsorption surface is obliquely arranged from top to bottom and extends to the discharge hole.
In one embodiment, the filter element further comprises a plurality of dispersion devices, which are located in the chamber to be filtered and connected with the inner wall surface of the housing, for dispersing and leveling the slurry stacked on the partition plate.
In one embodiment, the dispersing device comprises a driving motor and a swing rod, the driving motor is arranged on the inner wall surface of the shell, and the driving motor is in driving connection with the swing rod, so that the swing area of the swing rod is located above the partition plate.
For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a negative slurry purge system of the present application;
FIG. 2 is a schematic view of the filtration mechanism of the present application;
FIG. 3 is a schematic view of the filtration mechanism of the present application; (Filter elements of another filter group are inserted)
FIG. 4 is a schematic view of the filtration mechanism of the present application; (taking out a set of Filter elements of the Filter group)
FIG. 5 is a schematic view of a filter element of the present application.
Description of reference numerals:
10 stirring mechanism, 20 filtering mechanism, 210 filtering region, 220 filtering component, 221 casing, 221a inlet, 221b outlet, 222 partition plate, 223 magnetic adsorption surface, 224 auxiliary plate, 225 dispersing device, 30 coating mechanism, 40 pump mechanism, 50 manipulator mechanism
Detailed Description
In order to better illustrate the invention, the invention is described in further detail below with reference to the accompanying drawings.
It should be understood that the embodiments described are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the appended claims. In the description of the present application, it is to be understood that the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not necessarily used to describe a particular order or sequence, nor are they to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Further, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated object, indicating that there may be three relationships, for example, a and/or B, which may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
With reference to fig. 1 to 5, the present invention provides a negative electrode slurry impurity removal system, including: a stirring mechanism 10 for holding and stirring the slurry; a filtering mechanism 20, which is communicated with the stirring mechanism 10, and is used for receiving the slurry in the stirring mechanism 10, performing adsorption treatment on magnetic impurities contained in the slurry, and performing filtering treatment on large-particle impurities in the slurry; the filter mechanism 20 is provided with a filter area 210 therein, the filter area 210 is provided with a plurality of replaceable filter elements 220 therein, the filter elements 220 are sequentially distributed from top to bottom, and each filter element 220 is used for receiving the slurry above the filter element 220 and transferring the slurry to the filter element 220 below the filter element after impurity removal treatment.
Specifically, the present application uses the stirring mechanism 10 to stir and contain the slurry, the slurry after stirring is discharged into the filtering mechanism 20, and the filtering mechanism 20 is used to perform filtering operation, wherein a filtering region 210 is disposed in the filtering mechanism 20, the filtering region 210 has a plurality of replaceable filtering components 220 therein, each filtering component 220 has a function of adsorbing magnetic impurities contained in the slurry and filtering large-particle impurities in the slurry, and the quality problem caused by the magnetic impurities mixed in the slurry can be avoided by processing the slurry by using the plurality of filtering components 220; moreover, a plurality of filter elements 220 can be replaced correspondingly, the work of other filter elements 220 is not influenced in the replacement process, and the filter mechanism 20 can continue to operate, so that the non-stop operation is ensured.
In one embodiment, the plurality of filter elements 220 are divided into two groups, and the number of filter elements 220 in each group is the same; when one of the filter banks is within the filter zone 210, then some or all of the other filter bank is outside the filter zone 210. In this embodiment, two sets of the filtering groups may be defined as a first filtering group and a second filtering group, each of the first filtering group and the second filtering group has 5 filtering elements 220, the filtering effect of each filtering element 220 is different, and the filtering mesh numbers from top to bottom are respectively 100 meshes, 200 meshes, 300 meshes, 400 meshes and 500 meshes, so as to gradually filter large-particle impurities in the slurry; and each of the filter elements 220 has a magnetic attraction function.
Specifically, when the first filtering group is located in the filtering region 210, the filtering mechanism 20 performs impurity removal processing on the slurry through the 5 filtering elements 220 of the first filtering group (i.e., performs adsorption processing on the magnetic impurities contained in the slurry and performs filtering processing on the large-particle impurities in the slurry), and at this time, the 5 filtering elements 220 of the second filtering group are located outside the filtering region 210 and do not perform impurity removal processing on the slurry. When one of the filter elements 220 of the first filter group needs to be replaced, for example, a 100-mesh filter element 220 needs to be replaced, at this time, the corresponding 100-mesh filter element 220 of the second filter group is placed in the filter area 210 to replace the filter operation of the 100-mesh filter element 220 of the first filter group, and when the 100-mesh filter element 220 of the second filter group can completely replace the 100-mesh filter element 220 of the first filter group, the 100-mesh filter element 220 of the first filter group can be drawn out, so as to perform a cleaning and maintenance process on the 100-mesh filter element 220 of the first filter group. In the process of putting the 100-mesh filter elements 220 of the second filter group into the filter mechanism and taking the filter elements 220 of the first filter group out of the filter mechanism, the filter mechanism 20 does not need to be stopped, the stirring mechanism 10 does not need to be stopped, and the production efficiency is ensured.
Similarly, the above-described manner is also adopted when the other filter member 220 needs to be replaced.
Regarding how the filter elements 220 of another set of the filter groups are replaced, further, when one set of the filter groups is located in the filter area 210, there is a transition area between two adjacent filter elements 220, and the transition area is used for accommodating one filter element 220 of another set of the filter groups. For example, when the filter elements 220 of the first filter group are located in the filter area 210, a transition area is formed between the 100-mesh filter elements 220 and the 200-mesh filter elements 220, the height distance of the transition area is larger than the height setting of one filter element 220, and when the 100-mesh filter elements 220 need to be replaced, the 100-mesh filter elements 220 of the second filter group are placed in the transition area to receive the slurry from the 100-mesh filter elements 220 of the first filter group and the slurry from the stirring mechanism 10 and discharge the slurry into the 200-mesh filter elements 220 of the first filter group, and when the 100-mesh filter elements 220 of the second filter group can completely replace the 100-mesh filter elements 220 of the first filter group, the 100-mesh filter elements 220 of the first filter group can be drawn out of the filter area 210.
It should be noted that the filter mesh number of the filter elements 220 of the other filter group in the transition region is the same as the filter mesh number of the filter elements 220 above or below the transition region, and in this embodiment, the filter mesh number of the filter elements 220 of the other filter group in the transition region is the same as the filter mesh number of the filter elements 220 above the transition region.
In one embodiment, the placing in and taking out of the filtering component 220 can be assisted by the manipulator 50, which can save the carrying cost and ensure the physical health of workers, and can also ensure the successful replacement by using the high-precision operation of the manipulator. It should be noted that, the filter mechanism 20 has a corresponding positioning component to position and fix the filter component 220, a positioning groove may be disposed in the filter component 220 along the taking-out and putting-in direction, and a positioning column corresponding to the positioning groove may be disposed in the filter mechanism 20, so as to complete the positioning.
In one embodiment, the filter element 220 comprises: a casing 221 having an inlet 221a at an upper end of the casing 221 and an outlet 221b at a lower end of the casing 221; a partition plate 222 provided in the case 221 to divide the case 221 into a chamber to be filtered and a chamber to be filtered; the cavity to be filtered is communicated with the feeding hole 221a, and the filtered cavity is communicated with the discharging hole 221b; the partition plate 222 has a plurality of filtering holes. Specifically, the upper end of the casing 221 has an inlet 221a, the filtering component 220 receives the slurry above the casing (for example, the slurry output from the filtering component 220 above or the slurry output from the stirring mechanism 10) through the inlet 221a, the slurry enters the cavity to be filtered through the inlet 221a, and under the filtering action of the filtering holes on the partition plate 222, the slurry with small particles flows into the filtered cavity, and then flows out to the filtering component 220 below through the outlet 221b, or flows out to the next process (for example, the coating mechanism 30), and the impurities with large particles are confined in the region to be filtered 210, so as to complete the filtering process of the slurry. Wherein, the pump body mechanism 40 can be added to pump the slurry of the stirring mechanism 10 to the filtering mechanism 20.
The size of the filter holes in the partition plate 222 depends on the filtration requirement.
In one embodiment, the aperture of the discharge hole 221b is smaller than the aperture of the feed hole 221 a; the discharge hole 221b is located at the lower end of the housing 221 and is disposed near the left side or the right side. In this embodiment, the aperture of the discharge port 221b is set smaller than the aperture of the feed port 221a, so that the discharge speed of the filter element 220 can be reduced, the filter element 220 can be replaced with a new one for a long time, and the discharge loss caused by the too fast discharge speed can be avoided; in addition, the discharge hole 221b is disposed at a lower end of the housing 221 near the left or right side thereof, in preparation for subsequent replacement of the filter member 220.
Further, in the same group of filter groups, the discharge ports 221b of the filter components 220 are arranged on the same side; and is arranged at the side opposite to the discharge port 221b of the filtering part 220 of the other filtering set. For example, the discharge ports 221b of the filter members 220 of the first filter group are all disposed at the lower end of the housing 221 and near the left side, and the discharge ports 221b of the filter members 220 of the second filter group are all disposed at the lower end of the housing 221 and near the right side. When the 100-mesh filter element 220 of the first filter group needs to be replaced, the 100-mesh filter element 220 of the second filter group is firstly placed in the transition area, and at the moment, the feed port 221a of the 100-mesh filter element 220 of the second filter group receives the slurry output by the 100-mesh filter element 220 of the first filter group; the 100-mesh filtering components 220 of the first filtering group move rightward gradually, in the moving process, the 100-mesh filtering components 220 of the first filtering group still receive the slurry from the stirring mechanism 10, until the 100-mesh filtering components 220 of the first filtering group exceed the discharge port 221b of the stirring mechanism 10, the discharge port 221b of the stirring mechanism 10 directly conveys the slurry to the 100-mesh filtering components 220 of the second filtering group, and the 100-mesh filtering components 220 of the first filtering group do not receive the slurry of the stirring mechanism 10 any more, and continuously outputs the residual slurry in the shell 221 to the 100-mesh filtering components 220 of the second filtering group, until the slurry of the 100-mesh filtering components 220 of the first filtering group is completely output, the whole is taken out, and at this time, a replacing process is completed, so as to realize replacement.
In a similar way, when other filter components 220 need to be replaced, the above manner can be adopted, and in this embodiment, the position of the discharge port 221b is reasonably distributed and the taking-out direction of the filter component 220 is reasonably designed, so that the slurry sprinkling condition is avoided, and the slurry loss is reduced under the condition of ensuring the replacement without stopping.
Further, the downside that has filtered the chamber is equipped with magnetic adsorption face 223, magnetic adsorption face 223 top-down slope sets up and extends to discharge gate 221b, this application utilizes magnetic force of magnetic adsorption face 223 adsorbs the processing to the magnetic impurities who contains in the thick liquids, moreover magnetic adsorption face 223 top-down slope sets up and extends to discharge gate 221b, can be well come from treat that the thick liquids in filtering area 210 are guided to in the discharge gate 221b, and thick liquids are in when flowing in the magnetic adsorption face 223, can increase with magnetic adsorption face 223's area of contact ensures that more magnetic impurities are adsorbed on magnetic adsorption face 223. According to the magnetic impurity removing device, the magnetic impurities contained in the slurry are adsorbed through the plurality of filtering components 220, and the magnetic impurities in the slurry can be further fully removed.
Further, an auxiliary plate 224 is disposed in the filtered cavity, the auxiliary plate 224 is disposed in an inclined manner from top to bottom, and a projection of the auxiliary plate 224 is located above the discharge hole 221b, and is used for guiding the slurry onto the magnetic adsorption surface 223.
In one embodiment, the filtering component 220 further comprises a plurality of dispersion devices 225, which are located in the chamber to be filtered and connected to the inner wall surface of the casing 221, for dispersing and leveling the slurry accumulated on the partition plate 222. In this embodiment, the slurry in the chamber to be filtered is dispersed and pushed flat by the dispersing device, so that the slurry is ensured to exist at each position on the partition plate 222, and the slurry is prevented from being stacked high.
Further, the dispersing device comprises a driving motor and a swing rod, the driving motor is arranged on the inner wall surface of the shell 221, the driving motor is in driving connection with the swing rod, so that the swing area of the swing rod is located above the partition plate 222, the swing rod is driven to swing through the driving motor, and the dispersing and leveling of the pulp are achieved.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. The utility model provides a negative pole thick liquids edulcoration system which characterized in that includes:
the stirring mechanism is used for containing and stirring the slurry;
the filtering mechanism is communicated with the stirring mechanism and is used for receiving the slurry in the stirring mechanism, adsorbing magnetic impurities contained in the slurry and filtering large-particle impurities in the slurry;
the filtering mechanism is internally provided with a filtering area, the filtering area is internally provided with a plurality of replaceable filtering components, the filtering components are sequentially distributed and arranged from top to bottom, and each filtering component is used for receiving the slurry above the filtering component and transmitting the slurry to the filtering component below the filtering component after impurity removal treatment.
2. The negative electrode slurry impurity removal system according to claim 1, characterized in that:
the plurality of filter components are divided into two groups of filter groups, and the number of the filter components in each group of filter groups is the same;
when one of the filter sets is within the filter zone, then part or all of the other filter set is outside the filter zone.
3. The negative electrode slurry impurity removal system according to claim 2, characterized in that:
when one of the filter groups is in the filter area, a transition area is arranged between two adjacent filter components, and the transition area is used for accommodating one filter component of the other filter group.
4. The negative electrode slurry impurity removal system according to claim 3, characterized in that:
the filter mesh number of the filter elements of another group of the filter groups in the transition area is the same as the filter mesh number of the filter elements above or below the filter groups.
5. The negative electrode slurry impurity removal system according to claim 2, wherein the filter member includes: a housing having a feed inlet at an upper end of the housing and a discharge outlet at a lower end of the housing;
a partition plate provided in the housing to partition the housing into a chamber to be filtered and a chamber to be filtered; the cavity to be filtered is communicated with the feed inlet, and the filtered cavity is communicated with the discharge outlet; the partition plate is provided with a plurality of filter holes.
6. The negative electrode slurry impurity removal system according to claim 5, characterized in that:
the caliber of the discharge hole is smaller than that of the feed hole;
the discharge hole is located the lower extreme of casing and be close to left side or right side setting.
7. The negative electrode slurry impurity removal system according to claim 6, wherein:
in the same group of filtering groups, the discharge ports of the filtering components are arranged on the same side; and is arranged opposite to the discharge port of the filter component of the other group of filter groups.
8. The negative electrode slurry impurity removal system according to claim 6, wherein:
the lower side of the filtered cavity is provided with a magnetic adsorption surface which is obliquely arranged from top to bottom and extends to the discharge hole.
9. The negative electrode slurry impurity removal system according to claim 5, characterized in that:
the filter component also comprises a plurality of dispersing devices, and the dispersing devices are positioned in the cavity to be filtered, connected with the inner wall surface of the shell and used for dispersing and pushing the slurry stacked on the partition plate.
10. The negative electrode slurry impurity removal system according to claim 9, characterized in that:
the dispersion device comprises a driving motor and a swinging rod, the driving motor is arranged on the inner wall surface of the shell, and the driving motor is in driving connection with the swinging rod so that the swinging area of the swinging rod is located above the partition plate.
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| CN202310011822.9A CN115970884B (en) | 2023-01-05 | 2023-01-05 | Negative electrode slurry impurity removal system |
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| CN202310011822.9A CN115970884B (en) | 2023-01-05 | 2023-01-05 | Negative electrode slurry impurity removal system |
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| CN208340933U (en) * | 2018-07-03 | 2019-01-08 | 江西省耐力科技股份有限公司 | One kind being used for lithium battery apparatus for removing iron from slurry |
| CN208712223U (en) * | 2018-07-19 | 2019-04-09 | 剑阁县星荣粮油专业合作社 | A kind of rapeseed oil raw material handling device |
| CN209697425U (en) * | 2019-01-30 | 2019-11-29 | 合肥禾源粮油有限公司 | A kind of quick bolt-lock type classifying screen |
| CN211026979U (en) * | 2019-05-27 | 2020-07-17 | 合山市华美新能源科技有限公司 | Iron removing device for lithium battery slurry |
| CN110548333A (en) * | 2019-09-10 | 2019-12-10 | 邹娥贞 | Slurry filtering and deironing device for lithium battery production and manufacture |
| CN211030979U (en) * | 2019-09-10 | 2020-07-17 | 天津胜琦隆电子科技有限公司 | Injection molding machine loading attachment |
| CN211755417U (en) * | 2020-01-20 | 2020-10-27 | 龙岩荣创信息科技有限公司 | Lithium ion battery cathode material demagnetizer |
| CN212974317U (en) * | 2020-06-09 | 2021-04-16 | 东营辉耀石油设备有限公司 | Petroleum filtering device |
| CN213500497U (en) * | 2020-07-25 | 2021-06-22 | 天津市浩达日协橡塑制品有限公司 | Impurity removing device for feeding of injection molding machine |
| CN213222699U (en) * | 2020-09-04 | 2021-05-18 | 芯科众联新材料(常州)有限公司 | Demagnetization system for aluminum oxide preparation for lithium battery |
| CN215843222U (en) * | 2021-06-22 | 2022-02-18 | 元邦佳业(深圳)实业有限公司 | Breaker of lithium cell recovery usefulness |
| CN215695756U (en) * | 2021-07-03 | 2022-02-01 | 潍坊海心农业科技有限公司 | Multilayer vibration cleaning sieve |
| CN215964751U (en) * | 2021-10-21 | 2022-03-08 | 中晶(河南)钻石科技有限公司 | Diamond production is with sieve material device |
| CN114029160A (en) * | 2021-10-26 | 2022-02-11 | 江苏宇星科技有限公司 | Iron screening mechanism for iron oxide production slurry |
| CN217249712U (en) * | 2022-03-25 | 2022-08-23 | 蜂巢能源科技股份有限公司 | Slurry iron removing device |
| CN217830757U (en) * | 2022-07-20 | 2022-11-18 | 江苏傲农生物科技有限公司 | Fodder classifying screen device |
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