CN111482361A - Sieving mechanism is used in concrete production - Google Patents
Sieving mechanism is used in concrete production Download PDFInfo
- Publication number
- CN111482361A CN111482361A CN202010277406.XA CN202010277406A CN111482361A CN 111482361 A CN111482361 A CN 111482361A CN 202010277406 A CN202010277406 A CN 202010277406A CN 111482361 A CN111482361 A CN 111482361A
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- CN
- China
- Prior art keywords
- screening chamber
- screening
- piece
- assembly
- concrete production
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- B07B1/36—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens jigging or moving to-and-fro in more than one direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
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- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention is suitable for the technical field of concrete production, and provides a screening device for concrete production, which comprises: the screening chamber is internally provided with a screen; a mounting member; the screening chamber is rotatably mounted on the mounting member; a guide assembly; the intermittent reciprocating mechanism is used for intermittently driving the screening chamber to rotate clockwise and anticlockwise in a reciprocating manner; the intermittent reciprocating mechanism is arranged on the mounting piece; a transmission assembly; when the screening chamber carries out reciprocal in the same direction as, when anticlockwise rotating, drive assembly drives in step the installed part is along guide assembly carries out reciprocal linear motion. According to the invention, the intermittent reciprocating mechanism and the rotating assembly are arranged, so that the screening chamber can be driven to perform intermittent reciprocating rotation and reciprocating linear motion simultaneously, and materials in the screening chamber can perform multidirectional motion, thus the screening efficiency of the screen to the materials can be improved, and the material can be effectively prevented from blocking the screen.
Description
Technical Field
The invention belongs to the technical field of concrete production, and particularly relates to a screening device for concrete production.
Background
The concrete is artificial stone which is formed by taking cement as a main cementing material, water, sand, stones, chemical additives, mineral admixtures and other auxiliary raw materials and then stirring, compacting, forming, curing and hardening.
In the production process of concrete, raw materials such as sand and stones are generally required to be screened by a screening device so as to ensure the quality of concrete products. However, the conventional screening device for concrete raw materials mainly comprises a manual screen and a vibrating screen, and the screening device has the problems of low screening efficiency and the like.
Therefore, a screening device capable of efficiently screening concrete raw materials is urgently needed to be researched so as to improve the production efficiency of concrete.
Disclosure of Invention
The embodiment of the invention aims to provide a screening device for concrete production, and aims to solve the problems in the background art.
The embodiment of the invention is realized in such a way that the screening device for concrete production comprises:
the screening chamber is internally provided with a screen;
a mounting member; the screening chamber is rotatably mounted on the mounting member;
the guide assembly is used for enabling the mounting piece to linearly move along the guide assembly;
the intermittent reciprocating mechanism is used for intermittently driving the screening chamber to rotate clockwise and anticlockwise in a reciprocating manner; the intermittent reciprocating mechanism is arranged on the mounting piece and is connected with the screening chamber;
a transmission assembly; the transmission assembly is connected with the screening chamber; when the screening chamber carries out reciprocal in the same direction as, when anticlockwise rotating, drive assembly drives in step the installed part is along guide assembly carries out reciprocal linear motion.
As a preferable scheme of the embodiment of the invention, the screening chamber is provided with a feeding pipe and a discharging pipe, and the mounting pieces are provided with two groups; the feeding pipe and the discharging pipe are respectively and rotatably connected with the two mounting pieces; the feeding pipe and/or the discharging pipe are/is connected with the intermittent reciprocating mechanism; the feed pipe and/or the discharge pipe are also connected with the transmission assembly.
As another preferable aspect of the embodiment of the present invention, the transmission assembly includes:
the fixed rack is fixedly arranged on one side of the screening chamber;
the movable gear is fixed on the feeding pipe and/or the discharging pipe; the movable gear is meshed with the fixed rack.
As another preferable aspect of the embodiment of the present invention, the intermittent reciprocating mechanism includes:
the first driven gear is rotatably mounted on the mounting piece through a rotating shaft;
the two ends of the torsion spring are respectively connected with the mounting piece and the rotating shaft;
the second driven gear is fixed on the feeding pipe and/or the discharging pipe; the second driven gear is meshed with the first driven gear;
and the intermittent assembly is used for intermittently driving the first driven gear to rotate.
As another preferable aspect of the embodiment of the present invention, the intermittent assembly includes:
an incomplete gear intermittently meshed with the first driven gear;
the driving piece is used for driving the incomplete gear to rotate; the driving piece is connected with the incomplete gear.
As another preferable aspect of the embodiment of the present invention, the guide assembly includes:
the guide piece is fixedly arranged on one side of the screening chamber;
the sliding piece is used for driving the mounting piece to linearly slide; the sliding piece is in sliding fit with the guide piece and is fixedly connected with the mounting piece.
As another preferable aspect of the embodiment of the present invention, the screening apparatus further includes:
the elastic telescopic assembly is used for enabling the screen to perform vibrating motion; the screen is connected with the elastic telescopic component.
As another preferable aspect of the embodiment of the present invention, the elastic expansion assembly includes:
the second sliding block is in sliding fit with the inner wall of the screening chamber; the screen is arranged on the second sliding block;
the fixing column is fixedly arranged in the screening chamber;
the movable column is in sliding fit with the fixed column and is connected with the second sliding block;
and two ends of the elastic piece are respectively connected with the fixed column and the second sliding block.
According to the screening device for concrete production, provided by the embodiment of the invention, the intermittent reciprocating mechanism and the rotating assembly are arranged, so that the screening chamber can be driven to perform intermittent reciprocating rotation and reciprocating linear motion at the same time, and materials in the screening chamber can perform multidirectional motion, therefore, the screening efficiency of the screen to the materials can be improved, and the screen can be effectively prevented from being blocked by the materials.
Drawings
Fig. 1 is a schematic structural diagram of a screening device for concrete production according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an intermittent reciprocating mechanism provided in an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of another screening apparatus for concrete production according to an embodiment of the present invention.
Fig. 4 is a partially enlarged view of a portion a in fig. 3.
In the figure: 1-base, 2-support leg, 3-support, 4-top plate, 5-screening chamber, 6-feeding pipe, 7-discharging pipe, 8-screen, 9-movable plate, 10-first slide block, 11-guide bar, 12-first fixed block, 13-through hole, 14-second fixed block, 15-fixed rack, 16-movable gear, 17-motor, 18-incomplete gear, 19-first driven gear, 20-second driven gear, 21-rotating shaft, 22-torsion spring, 23-second slide block, 24-fixed column, 25-movable column, 26-spring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In addition, in the description of the present application, terms used should be construed broadly, and specific meanings of the terms may be understood by those skilled in the art according to actual situations. For example, the term "mounted" as used in this application may be defined as a fixed mounting that is removable or a fixed mounting that is not removable, etc.; the terms "set" and "provided" as used herein may be defined as either a contact or a non-contact arrangement, etc.; the terms "connected" and "coupled" as used herein may be defined as a fixed mechanical connection such as welded, riveted, bolted, interference fit, or as a movable mechanical connection such as hinged, connected through bearings, etc.; all the terms of orientation used are used with reference to the drawings or are based on the direction defined by the actual situation and the common general knowledge.
As shown in fig. 1, an embodiment of the present invention provides a screening apparatus for concrete production, including:
the screening chamber 5 is internally provided with a screen 8;
a mounting member; the screening chamber 5 is rotatably mounted on the mounting;
the guide assembly is used for enabling the mounting piece to linearly move along the guide assembly;
the intermittent reciprocating mechanism is used for intermittently driving the screening chamber 5 to rotate clockwise and anticlockwise in a reciprocating manner; the intermittent reciprocating mechanism is arranged on the mounting piece and is connected with the screening chamber 5;
a transmission assembly; the transmission assembly is connected with the screening chamber 5; when the screening chamber 5 rotates clockwise and anticlockwise in a reciprocating mode, the transmission assembly synchronously drives the mounting piece to do reciprocating linear motion along the guide assembly.
In practical application, the screening chamber 5 can adopt a cylindrical structure; the installed part is the fly leaf 9, and the fly leaf 9 can set up between base 1 and roof 4 through the guide assembly, and base 1 bottom is fixed with a plurality of groups of stabilizer blade 2, and roof 4 is through the top of a plurality of groups of support 3 fixed mounting at base 1.
According to the embodiment of the invention, the intermittent reciprocating mechanism and the rotating assembly are arranged, so that the screening chamber 5 can be driven to perform intermittent reciprocating rotation and reciprocating linear motion at the same time, and the material in the screening chamber 5 can perform multidirectional motion, so that the screening efficiency of the screen 8 on the material can be improved, and the material can be effectively prevented from blocking the screen 8.
As shown in fig. 1, as a preferred solution of the embodiment of the present invention, the screening chamber 5 is provided with a feeding pipe 6 and a discharging pipe 7, and the mounting members are provided in two sets; the feeding pipe 6 and the discharging pipe 7 are respectively and rotatably connected with the two groups of mounting pieces; the feeding pipe 6 and/or the discharging pipe 7 are/is connected with the intermittent reciprocating mechanism; the feed pipe 6 and/or the discharge pipe 7 are also connected to the drive assembly.
Specifically, in practical application, the feed pipe 6 and the discharge pipe 7 are respectively arranged at the bottom of the top of the screening chamber 5 and are communicated with the screening chamber 5; the feeding pipe 6 and the discharging pipe 7 are respectively and rotatably arranged on the two groups of movable plates 9 through bearing seats; all be equipped with through-hole 13 on base 1 and the roof 4 to inlet pipe 6 and discharging pipe 7 move about.
As another preferred aspect of the embodiment of the present invention, as shown in fig. 1, the transmission assembly includes:
a fixed rack 15, wherein the fixed rack 15 is fixedly arranged on one side of the screening chamber 5;
the movable gear 16 is fixed on the feeding pipe 6 and/or the discharging pipe 7; the movable gear 16 is engaged with the fixed rack 15.
Specifically, the fixed rack 15 is fixed between two groups of second fixed blocks 14, and the two groups of second fixed blocks 14 are both fixedly mounted on the top plate 4; the movable gear 16 is sleeved and fixed on the outer wall of the feeding pipe 6; when the feeding pipe 6 rotates, the movable gear 16 can roll along the fixed rack 15, so that the screening chamber 5 can be driven to move linearly along the length direction of the fixed rack 15.
As shown in fig. 1-2, as another preferable solution of the embodiment of the present invention, the intermittent reciprocating mechanism includes:
a first driven gear 19, wherein the first driven gear 19 is rotatably arranged on the mounting piece through a rotating shaft 21;
the two ends of the torsion spring 22 are respectively connected with the mounting piece and the rotating shaft 21;
a second driven gear 20, wherein the second driven gear 20 is fixed on the feeding pipe 6 and/or the discharging pipe 7; the second driven gear 20 is meshed with the first driven gear 19;
and the intermittent assembly is used for intermittently driving the first driven gear 19 to rotate.
Specifically, the first driven gear 19 is fixed on one end of the rotating shaft 21, and the other end of the rotating shaft 21 is rotatably mounted on the movable plate 9 through a bearing seat; the torsion spring 22 is sleeved outside the rotating shaft 21, and two ends of the torsion spring are respectively fixedly connected with the rotating shaft 21 and the movable plate 9. The second driven gear 20 is sleeved and fixed on the outer wall of the feeding pipe 6.
As shown in fig. 1-2, as another preferable solution of the embodiment of the present invention, the intermittent assembly includes:
an incomplete gear 18, the incomplete gear 18 being intermittently meshed with the first driven gear 19;
a driving member for driving the incomplete gear 18 to rotate; the drive member is connected to the partial gear 18.
Specifically, the driving member may adopt a motor 17, and the incomplete gear 18 is connected with a motor shaft of the motor 17; the incomplete gear 18 can be driven to rotate by the motor 17, and the rotation of the incomplete gear 18 can intermittently drive the first driven gear 19 to rotate, so that the first driven gear 19 can intermittently reciprocate under the action of the torsion spring 22, and the screening chamber 5 can be driven to intermittently reciprocate by the second driven gear 20; in addition, the intermittent reciprocating rotation of the screening chamber 5 can make the screening chamber 5 perform reciprocating linear motion along the direction vertical to the axis of the screening chamber 5 through the fixed rack 15 and the movable gear 16, so that the screening efficiency of the materials in the screening chamber 5 can be greatly improved.
As another preferred aspect of the embodiment of the present invention, as shown in fig. 1, the guide assembly includes:
a guide member fixedly provided at one side of the sieving chamber 5;
the sliding piece is used for driving the mounting piece to linearly slide; the sliding piece is in sliding fit with the guide piece and is fixedly connected with the mounting piece.
Specifically, the guide member is a guide rod 11, and the guide rod 11 is fixed on the top plate 4 or the base 1 through two groups of first fixing blocks 12; the sliding parts are first sliding blocks 10, and two groups of the first sliding blocks 10 can be arranged; one end of the first sliding block 10 is sleeved on the guide rod 11 and is in sliding fit with the guide rod 11; the other end of the first sliding block 10 is welded and fixed on the movable plate 9.
As shown in fig. 3, as another preferable solution of the embodiment of the present invention, the screening apparatus further includes:
the elastic telescopic component is used for enabling the screen 8 to perform vibration motion; the screen 8 is connected with the elastic telescopic component.
As shown in fig. 3 to 4, as another preferable solution of the embodiment of the present invention, the elastic expansion assembly includes:
the second sliding block 23 is in sliding fit with the inner wall of the screening chamber 5; the screen 8 is arranged on the second slide block 23;
the fixing columns 24 are fixedly arranged in the screening chamber 5;
the movable column 25 is in sliding fit with the fixed column 24, and is connected with the second sliding block 23;
and two ends of the elastic piece are respectively connected with the fixed column 24 and the second sliding block 23.
Specifically, the second slide block 23 may adopt an annular structure, and a screen 8 is installed inside the second slide block; the elastic member may employ a spring 26; the spring 26 is sleeved outside the movable column 25, and two ends of the spring are respectively connected with the fixed column 24 and the second sliding block 23. When the screening chamber 5 carries out reciprocal linear motion and reciprocating rotation, the material on the screen cloth 8 can move thereupon for the quality of material changes on the screen cloth 8, thereby can be under the effect of spring 26, makes screen cloth 8 vibrate from top to bottom, in order to further improve the screening effect of screen cloth 8 to the material.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. The utility model provides a sieving mechanism is used in concrete production, includes the screening chamber, be equipped with the screen cloth in the screening chamber, its characterized in that, sieving mechanism still includes:
a mounting member; the screening chamber is rotatably mounted on the mounting member;
the guide assembly is used for enabling the mounting piece to linearly move along the guide assembly;
the intermittent reciprocating mechanism is used for intermittently driving the screening chamber to rotate clockwise and anticlockwise in a reciprocating manner; the intermittent reciprocating mechanism is arranged on the mounting piece and is connected with the screening chamber;
a transmission assembly; the transmission assembly is connected with the screening chamber; when the screening chamber carries out reciprocal in the same direction as, when anticlockwise rotating, drive assembly drives in step the installed part is along guide assembly carries out reciprocal linear motion.
2. The screening apparatus for concrete production according to claim 1, wherein the screening chamber is provided with a feed pipe and a discharge pipe, and the mounting members are provided in two groups; the feeding pipe and the discharging pipe are respectively and rotatably connected with the two mounting pieces; the feeding pipe and/or the discharging pipe are/is connected with the intermittent reciprocating mechanism; the feed pipe and/or the discharge pipe are also connected with the transmission assembly.
3. The screening apparatus for concrete production according to claim 2, wherein the transmission assembly includes:
the fixed rack is fixedly arranged on one side of the screening chamber;
the movable gear is fixed on the feeding pipe and/or the discharging pipe; the movable gear is meshed with the fixed rack.
4. The screening apparatus for concrete production according to claim 2, wherein the intermittent reciprocating mechanism comprises:
the first driven gear is rotatably mounted on the mounting piece through a rotating shaft;
the two ends of the torsion spring are respectively connected with the mounting piece and the rotating shaft;
the second driven gear is fixed on the feeding pipe and/or the discharging pipe; the second driven gear is meshed with the first driven gear;
and the intermittent assembly is used for intermittently driving the first driven gear to rotate.
5. The screening apparatus for concrete production according to claim 4, wherein the intermittent assembly comprises:
an incomplete gear intermittently meshed with the first driven gear;
the driving piece is used for driving the incomplete gear to rotate; the driving piece is connected with the incomplete gear.
6. The screening apparatus for concrete production according to claim 1, wherein the guide assembly comprises:
the guide piece is fixedly arranged on one side of the screening chamber;
the sliding piece is used for driving the mounting piece to linearly slide; the sliding piece is in sliding fit with the guide piece and is fixedly connected with the mounting piece.
7. The screening apparatus for concrete production according to any one of claims 1 to 6, further comprising:
the elastic telescopic assembly is used for enabling the screen to perform vibrating motion; the screen is connected with the elastic telescopic component.
8. The screening apparatus for concrete production according to claim 7, wherein the elastic expansion assembly comprises:
the second sliding block is in sliding fit with the inner wall of the screening chamber; the screen is arranged on the second sliding block;
the fixing column is fixedly arranged in the screening chamber;
the movable column is in sliding fit with the fixed column and is connected with the second sliding block;
and two ends of the elastic piece are respectively connected with the fixed column and the second sliding block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010277406.XA CN111482361A (en) | 2020-04-10 | 2020-04-10 | Sieving mechanism is used in concrete production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010277406.XA CN111482361A (en) | 2020-04-10 | 2020-04-10 | Sieving mechanism is used in concrete production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111482361A true CN111482361A (en) | 2020-08-04 |
Family
ID=71790149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010277406.XA Withdrawn CN111482361A (en) | 2020-04-10 | 2020-04-10 | Sieving mechanism is used in concrete production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111482361A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113976818A (en) * | 2021-11-02 | 2022-01-28 | 含山县天宇机械铸造厂 | Molding sand dispersing and screening device for mechanical casting |
| CN114749374A (en) * | 2022-03-30 | 2022-07-15 | 贵州省凤冈县田坝魅力黔茶有限公司 | Screening device in tea manufacturing process |
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| GB190913722A (en) * | 1909-06-11 | 1910-04-14 | George Frederick Zimmer | A Combined Revolving and Reciprocating Sifting Conveyor. |
| CN107999385A (en) * | 2017-12-26 | 2018-05-08 | 郑州默尔电子信息技术有限公司 | A kind of multidirectional translational formula Concrete sandstone screening plant |
| CN108160438A (en) * | 2017-12-26 | 2018-06-15 | 郑州默尔电子信息技术有限公司 | A kind of rotating cylinder parallel-moving type Concrete sandstone screening plant |
| WO2018119659A1 (en) * | 2016-12-27 | 2018-07-05 | 深圳市玖创科技有限公司 | Dual-loading type mixing and stirring device for negative electrode material of lithium battery |
| CN109049417A (en) * | 2018-07-24 | 2018-12-21 | 黄山豪泰塑胶有限公司 | A kind of equipment for purifying of PVC packaging material |
| CN109317403A (en) * | 2018-11-26 | 2019-02-12 | 杨迪忠 | A kind of Chemical Manufacture PP GRANULES screening plant |
| CN209501980U (en) * | 2019-02-01 | 2019-10-18 | 射阳县云昭饲料有限公司 | A kind of rotary screening machine of production aquatic granulated feed |
| CN110727333A (en) * | 2019-10-22 | 2020-01-24 | 皖西学院 | Dustproof heat abstractor and computer machine case |
| CN210112911U (en) * | 2019-06-21 | 2020-02-25 | 重庆化工职业学院 | Chemical industry reducing mechanism with intermittent type unloading function |
| CN210159927U (en) * | 2019-06-21 | 2020-03-20 | 东海县华科环保科技有限公司 | Quartz sand screening machine |
-
2020
- 2020-04-10 CN CN202010277406.XA patent/CN111482361A/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190913722A (en) * | 1909-06-11 | 1910-04-14 | George Frederick Zimmer | A Combined Revolving and Reciprocating Sifting Conveyor. |
| WO2018119659A1 (en) * | 2016-12-27 | 2018-07-05 | 深圳市玖创科技有限公司 | Dual-loading type mixing and stirring device for negative electrode material of lithium battery |
| CN107999385A (en) * | 2017-12-26 | 2018-05-08 | 郑州默尔电子信息技术有限公司 | A kind of multidirectional translational formula Concrete sandstone screening plant |
| CN108160438A (en) * | 2017-12-26 | 2018-06-15 | 郑州默尔电子信息技术有限公司 | A kind of rotating cylinder parallel-moving type Concrete sandstone screening plant |
| CN109049417A (en) * | 2018-07-24 | 2018-12-21 | 黄山豪泰塑胶有限公司 | A kind of equipment for purifying of PVC packaging material |
| CN109317403A (en) * | 2018-11-26 | 2019-02-12 | 杨迪忠 | A kind of Chemical Manufacture PP GRANULES screening plant |
| CN209501980U (en) * | 2019-02-01 | 2019-10-18 | 射阳县云昭饲料有限公司 | A kind of rotary screening machine of production aquatic granulated feed |
| CN210112911U (en) * | 2019-06-21 | 2020-02-25 | 重庆化工职业学院 | Chemical industry reducing mechanism with intermittent type unloading function |
| CN210159927U (en) * | 2019-06-21 | 2020-03-20 | 东海县华科环保科技有限公司 | Quartz sand screening machine |
| CN110727333A (en) * | 2019-10-22 | 2020-01-24 | 皖西学院 | Dustproof heat abstractor and computer machine case |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113976818A (en) * | 2021-11-02 | 2022-01-28 | 含山县天宇机械铸造厂 | Molding sand dispersing and screening device for mechanical casting |
| CN114749374A (en) * | 2022-03-30 | 2022-07-15 | 贵州省凤冈县田坝魅力黔茶有限公司 | Screening device in tea manufacturing process |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200804 |
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