CN111871751A - Grading equipment is used in edible oil processing - Google Patents
Grading equipment is used in edible oil processing Download PDFInfo
- Publication number
- CN111871751A CN111871751A CN202010731980.8A CN202010731980A CN111871751A CN 111871751 A CN111871751 A CN 111871751A CN 202010731980 A CN202010731980 A CN 202010731980A CN 111871751 A CN111871751 A CN 111871751A
- Authority
- CN
- China
- Prior art keywords
- fixedly connected
- lateral wall
- side wall
- edible oil
- oil processing
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- 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
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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
- B07B1/04—Stationary flat screens
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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
- B07B1/42—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
- B07B1/522—Cleaning with brushes or scrapers with brushes
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B1/00—Production of fats or fatty oils from raw materials
- C11B1/02—Pretreatment
- C11B1/04—Pretreatment of vegetable raw material
-
- 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
Abstract
The invention relates to the technical field of edible oil processing, and discloses grading equipment for edible oil processing, which comprises a working box, wherein the side wall of the working box is provided with a plurality of net openings, a filter screen plate is inserted in each net opening, the side wall of the working box is fixedly connected with a plurality of clamping blocks which are respectively and fixedly connected to two sides of each net opening, the side wall of each clamping block is provided with a limiting hole, a limiting pin is inserted in each limiting hole, the side wall of each filter screen plate is provided with a jack matched with each limiting hole, the upper end of each limiting pin is fixedly connected with a pull plate, and the same spring which is sleeved outside each limiting pin is fixedly connected between each pull plate and the upper side wall of each clamping block positioned. This grading equipment for edible oil processing can appear damaging when the filter screen, and convenient quick change filter screen has improved the work efficiency of operating personnel and screening kernel and can carry out the screening in grades to the kernel under the condition that produces less noise, avoids the great meeting of noise to bring the influence to operating personnel's physical and mental health.
Description
Technical Field
The invention relates to the technical field of edible oil processing, in particular to grading equipment for edible oil processing.
Background
At present, the common processing and refining method of edible oil is that after raw materials are unshelled and crushed, the raw materials are extracted by Soxhlet extraction to prepare crude oil, the Soxhlet extraction method is used for preparing the crude oil, the extraction efficiency is high, the preparation cost is low, and then the crude oil is refined under the condition of reduced pressure distillation to obtain high-grade edible oil; there are many oil seeds for preparing edible oil, such as sunflower seeds, cotton seeds, olive, palm seeds, rapeseed, safflower seeds, sesame, macadamia nut, congola, plukenetia volubilis, watermelon seeds, cucurbita pepo seeds, buffalo gourd seeds, winter pumpkin seeds, etc., which are subjected to shelling and crushing, followed by soxhlet extraction, whereas the crushed nuts are subjected to size classification before being subjected to subsequent extraction processes.
The classification mode of sieve that shakes is mostly adopted to present the classification mode of kernel, and the noise that the sieve that shakes produced is great, and operating personnel can influence operating personnel's physical and mental health and shake the inconvenient change of the filter plate of sieve in noisy environment, and when filter plate damaged when needing to be changed, the time of operating personnel dismouting filter plate is longer, influences the work efficiency that the kernel was got to the sieve.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a grading device for processing edible oil, which has the advantages of low noise, convenience in replacing a filter screen plate and the like, and solves the problems that the existing kernel grading mode mostly adopts a vibrating screen grading mode, the noise generated by a vibrating screen is high, operators can influence the physical and mental health of the operators in a noisy environment, the filter screen plate of the vibrating screen is inconvenient to replace, and when the filter screen plate is damaged and needs to be replaced, the time for the operators to disassemble and assemble the filter screen plate is long, and the working efficiency of sieving to take kernels is influenced.
(II) technical scheme
In order to realize the purposes of low noise and convenient replacement of the filter screen plate, the invention provides the following technical scheme: a grading device for processing edible oil comprises a working box, wherein a plurality of net openings are formed in the side wall of the working box, a filter screen plate is inserted in each net opening, a plurality of clamping blocks fixedly connected to the two sides of each net opening respectively are fixedly connected to the side wall of the working box, a limiting hole is formed in the side wall of each clamping block, a limiting pin is inserted in each limiting hole, jacks matched with the limiting holes are formed in the side wall of each filter screen plate, a pulling plate is fixedly connected to the upper end of each limiting pin, a first spring sleeved outside each limiting pin is fixedly connected between each pulling plate and the upper side wall of each clamping block above each net opening, a plurality of sliding grooves are formed in the inner walls of the two sides of the working box, sliding blocks matched with the sliding grooves are fixedly connected to the side walls of the two sides of each filter screen plate, and a plurality of threaded barrels are rotatably connected to the side wall of, it is a plurality of the equal fixed cover of outer wall of a screw thread section of thick bamboo is equipped with intermeshing's driven gear, the last lateral wall fixedly connected with driving motor of work box, driving motor's output fixedly connected with and driven gear engaged with driving gear mutually, screw thread section of thick bamboo internal thread has cup jointed reciprocal lead screw, reciprocal lead screw is located one end of work box and is connected with the mounting panel, two fixed blocks of the lateral wall symmetry fixedly connected with of mounting panel, two the lateral wall of fixed block one side in opposite directions all is connected with same push pedal through the pivot rotation, the same root second spring of lateral wall fixedly connected with between mounting panel and the push pedal, the lateral wall fixedly connected with ejector pad of mounting panel.
Preferably: equal fixedly connected with damper cylinder in four corners department of work box lower surface, the shock attenuation pole has been pegged graft in the damper cylinder, the lower extreme fixedly connected with wheel board of shock attenuation pole, the upper end fixedly connected with cardboard of shock attenuation pole, two spring grooves have been seted up to the lower lateral wall symmetry of damper cylinder fixedly, two equal fixedly connected with damping spring in the spring groove, the last lateral wall fixed connection of damping spring and wheel board.
Preferably: the lower side wall of the wheel plate is fixedly connected with a universal self-locking wheel.
Preferably: the utility model discloses a material pushing device, including work box, last lateral wall fixedly connected with installation piece, the last lateral wall fixedly connected with material frame of installation piece, the lateral wall fixedly connected with pneumatic cylinder of material frame, the output of pneumatic cylinder runs through the lateral wall and the fixedly connected with scraping wings of material frame, it has same each inlet pipe to fix the intercommunication between material frame and the work box.
Preferably: the meshes of the filter screen plate are sequentially reduced from top to bottom.
Preferably: the lower side wall of the push plate is fixedly connected with bristles.
Preferably: the rod wall of the reciprocating screw rod is provided with a sliding groove, and the side wall of the working box is fixedly connected with a sliding rod with an L-shaped cross section.
Preferably: a plurality of discharge gates have been seted up to the lateral wall of work box, the lateral wall fixedly connected with cover of work box establishes the ejection of compact frame outside the discharge gate.
(III) advantageous effects
Compared with the prior art, the invention provides the grading equipment for processing the edible oil, which has the following beneficial effects:
1. this grading equipment is used in edible oil processing through work box, net gape, filter plate, fixture block, spacing hole, spacer pin, jack, arm-tie and the first spring that sets up, can appear damaging when the filter screen, convenient quick change filter screen has improved the work efficiency of operating personnel and screening kernel.
2. This grading equipment is used in edible oil processing through a screw thread section of thick bamboo, driven gear, driving motor, driving gear, reciprocal lead screw, mounting panel, fixed block, push pedal, second spring and ejector pad, can carry out the screening in grades to the kernel under the condition that produces less noise, avoids the great influence that can bring operating personnel's physical and mental health of noise.
Drawings
FIG. 1 is a schematic structural diagram of a grading apparatus for edible oil processing according to the present invention;
FIG. 2 is an enlarged view of a portion A of the grading apparatus for edible oil processing in FIG. 1 according to the present invention;
FIG. 3 is an enlarged view of a portion B of the grading apparatus for edible oil processing in FIG. 1 according to the present invention;
fig. 4 is a schematic diagram of a position relationship between a filter screen plate and a fixture block in the grading equipment for processing edible oil provided by the invention.
In the figure: 1 working box, 2 screen openings, 3 filter screen plates, 4 clamping blocks, 5 limiting holes, 6 limiting pins, 7 jacks, 8 pulling plates, 9 first springs, 10 sliding grooves, 11 sliding blocks, 12 threaded cylinders, 13 driven gears, 14 driving motors, 15 driving gears, 16 reciprocating screw rods, 17 mounting plates, 18 fixing blocks, 19 pushing plates, 20 second springs, 21 pushing blocks, 22 damping cylinders, 23 damping rods, 24 wheel plates, 25 clamping plates, 26 spring grooves, 27 damping springs, 28 universal self-locking wheels, 29 mounting blocks, 30 raw material frames, 31 hydraulic cylinders, 32 pushing plates, 33 feeding pipes, 34 bristles, 35 sliding grooves, 36 sliding rods, 37 discharging openings and 38 discharging frames.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a grading device for processing edible oil comprises a working box 1, a plurality of net openings 2 are formed in the side wall of the working box 1, a filter screen plate 3 is inserted into each net opening 2, a plurality of clamping blocks 4 fixedly connected to the two sides of each net opening 2 are fixedly connected to the side wall of the working box 1, a limiting hole 5 is formed in the side wall of each clamping block 4, a limiting pin 6 is inserted into each limiting hole 5, a jack 7 matched with each limiting hole 5 is formed in the side wall of each filter screen plate 3, a pull plate 8 is fixedly connected to the upper end of each limiting pin 6, a first spring 9 sleeved outside each limiting pin 6 is fixedly connected between each pull plate 8 and the upper side wall of each clamping block 4 above each net opening 2, a plurality of sliding grooves 10 are formed in the inner walls of the two sides of the working box 1, sliding blocks 11 matched with the sliding grooves 10 are fixedly connected to the side walls of the two sides of each filter screen plate 3, a plurality of, the equal fixed cover of outer wall of a plurality of screw thread section of thick bamboos 12 is equipped with intermeshing's driven gear 13, the last lateral wall fixedly connected with driving motor 14 of work box 1, driving motor 14's output fixedly connected with and driven gear 13 engaged with driving gear 15, screw thread section of thick bamboo 12 internal thread has cup jointed reciprocal lead screw 16, one end that reciprocal lead screw 16 is located work box 1 is connected with mounting panel 17, two fixed blocks 18 of the lateral wall symmetry fixedly connected with of mounting panel 17, the lateral wall of two fixed blocks 18 one side in opposite directions all is connected with same push pedal 19 through the pivot rotation, the same root second spring 20 of lateral wall fixedly connected with between mounting panel 17 and the push pedal 19, mounting panel 17's lateral wall fixedly connected with ejector pad.
Equal fixedly connected with damper cylinder 22 in four corners department of 1 lower surface of work box, it has the shock attenuation pole 23 to peg graft in the damper cylinder 22, the lower extreme fixedly connected with wheel board 24 of shock attenuation pole 23, the upper end fixedly connected with cardboard 25 of shock attenuation pole 23, two spring grooves 26 have been seted up to damper cylinder 22's lower lateral wall symmetry is fixed, equal fixedly connected with damping spring 27 in two spring grooves 26, damping spring 27 and wheel board 24's last lateral wall fixed connection, can slow down the vibrations of the device during operation, the device internals's wearing and tearing have been slowed down, the device's life has been improved.
The universal self-locking wheel 28 is fixedly connected to the lower side wall of the wheel plate 24, so that the moving convenience of the device is improved.
The side wall fixedly connected with installation piece 29 on work box 1, the side wall fixedly connected with material frame 30 on installation piece 29, the lateral wall fixedly connected with pneumatic cylinder 31 of material frame 30, the output of pneumatic cylinder 31 runs through the lateral wall and the fixedly connected with scraping wings 32 of material frame 30, fixed intercommunication has same each inlet pipe 33 between material frame 30 and the work box 1, can be automatic constantly carry the raw materials to in the work box 1, do not need the manual transport of operating personnel, reduced operating personnel's work load.
The meshes of the filter screen plates 3 are sequentially reduced from top to bottom, the upper filter screen plate 3 can screen kernels with larger diameters, and the kernels with slightly smaller diameters can be separated from the upper filter screen plate 3.
The lower side wall of the push plate 19 is fixedly connected with bristles 34, so that kernels with small volume can be prevented from being damaged.
The rod wall of the reciprocating screw rod 16 is provided with a sliding groove 35, the side wall of the working box 1 is fixedly connected with a sliding rod 36 with an L-shaped cross section, and the reciprocating screw rod 16 is prevented from rotating through the mutual matching of the sliding rod 26 and the sliding groove 35, so that the reciprocating screw rod 16 can only move left and right in the horizontal direction.
A plurality of discharge ports 37 are formed in the side wall of the working box 1, and a discharge frame 38 covering the discharge ports 37 is fixedly connected to the side wall of the working box 1, so that the kernels can flow out conveniently after being dried and selected.
In conclusion, according to the grading equipment for processing edible oil, when the filter screen plate 3 is damaged, the pulling plate 8 is lifted upwards, the pulling plate 8 drives the limiting pin 6 to move upwards to a proper position, the limiting pin 6 is separated from the jack 7, the filter screen plate 3 can be drawn out, the filter screen plate 3 can be installed and completed through secondary operation, when the filter screen is damaged, the filter screen can be replaced conveniently and quickly, and the working efficiency of operators and kernel screening is improved; the hydraulic cylinder 31 is started to work, the hydraulic cylinder 31 pushes the kernels placed in the raw material frame 30 to the feeding pipe 33 through the material pushing plate 32 to fall onto the filter screen plate 3, a part of the kernels with a smaller volume falls onto the filter screen plate 3 below, then the driving motor 14 is started to work, the driving motor 14 drives the threaded cylinder 12 to rotate through the mutual matching of the driving gear 15 and the driven gear 13, the reciprocating screw rod 16 is driven to move leftwards through the matching of threads, the reciprocating screw rod 16 drives the mounting plate 17 to move leftwards, the mounting plate 17 drives the pushing plate 19 to push the kernels to move leftwards through the fixed block 18, the kernels with a smaller volume continuously fall onto the filter screen plate 3 below in the moving process, the kernels with a larger volume are discharged out of the work box 1 through the discharge port 37 and the discharge frame 38, when the pushing plate 19 returns, the pushing plate 19 rotates around the fixed block 18 without pushing the kernels, the device can carry out the classified screening to the kernel under the condition that produces less noise, avoids the noise great can bring the influence to operating personnel's physical and mental health.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a grading plant is used in edible oil processing, includes work box (1), its characterized in that: a plurality of net gapes (2) have been seted up to the lateral wall of work box (1), it has filter plate (3) to peg graft in net gape (2), a plurality of fixed connection respectively of lateral wall fixedly connected with of work box (1) fixture block (4) in net gape (2) both sides, spacing hole (5) have been seted up to the lateral wall of fixture block (4), it has spacer pin (6) to peg graft in spacing hole (5), filter plate (3) lateral wall set up with spacing hole (5) assorted jack (7), the upper end fixedly connected with arm-tie (8) of spacer pin (6), arm-tie (8) and being located net gape (2) top fixedly connected with establishes first spring (9) outside spacer pin (6) with root cover between the last lateral wall of fixture block (4), a plurality of sliding tray (10) have all been seted up to the inner wall of work box (1) both sides, the equal fixedly connected with of lateral wall of filter plate (3) both sides has with sliding tray (10) assorted sliding tray (10), sliding tray The side wall of the working box (1) is rotatably connected with a plurality of threaded cylinders (12) through bearings, the outer wall of each threaded cylinder (12) is fixedly sleeved with a driven gear (13) meshed with each other, the upper side wall of the working box (1) is fixedly connected with a driving motor (14), the output end of the driving motor (14) is fixedly connected with a driving gear (15) meshed with the driven gear (13), a reciprocating lead screw (16) is sleeved in the threaded cylinders (12), one end of the reciprocating lead screw (16) positioned in the working box (1) is connected with a mounting plate (17), the side wall of the mounting plate (17) is symmetrically and fixedly connected with two fixing blocks (18), the two opposite side walls of the fixing blocks (18) are rotatably connected with the same push plate (19) through rotating shafts, and the same side wall between the mounting plate (17) and the push plate (19) is fixedly connected with the same second spring (20), the side wall of the mounting plate (17) is fixedly connected with a push block (21).
2. The classification apparatus for edible oil processing according to claim 1, wherein: equal fixedly connected with damper cylinder (22) in four corners department of work box (1) lower surface, it has shock attenuation pole (23) to peg graft in damper cylinder (22), lower extreme fixedly connected with wheel board (24) of shock attenuation pole (23), the upper end fixedly connected with cardboard (25) of shock attenuation pole (23), two spring groove (26), two have been seted up to the lower lateral wall symmetry of damper cylinder (22) is fixed equal fixedly connected with damping spring (27) in spring groove (26), the last lateral wall fixed connection of damping spring (27) and wheel board (24).
3. The classification apparatus for edible oil processing according to claim 2, wherein: the lower side wall of the wheel plate (24) is fixedly connected with a universal self-locking wheel (28).
4. The classification apparatus for edible oil processing according to claim 1, wherein: the utility model discloses a material pushing device, including work box (1), last lateral wall fixedly connected with installation piece (29) of work box (1), last lateral wall fixedly connected with material frame (30) of installation piece (29), lateral wall fixedly connected with pneumatic cylinder (31) of material frame (30), lateral wall and fixedly connected with scraping wings (32) that the output of pneumatic cylinder (31) runs through material frame (30), fixed intercommunication has same each inlet pipe (33) between material frame (30) and work box (1).
5. The classification apparatus for edible oil processing according to claim 1, wherein: the meshes of the filter screen plate (3) are sequentially reduced from top to bottom.
6. The classification apparatus for edible oil processing according to claim 1, wherein: the lower side wall of the push plate (19) is fixedly connected with bristles (34).
7. The classification apparatus for edible oil processing according to claim 1, wherein: a sliding groove (35) is formed in the rod wall of the reciprocating screw rod (16), and a sliding rod (36) with an L-shaped cross section is fixedly connected to the side wall of the working box (1).
8. The classification apparatus for edible oil processing according to claim 1, wherein: a plurality of discharge gates (37) have been seted up to the lateral wall of work box (1), the material frame (38) of establishing outside discharge gate (37) is covered to the lateral wall fixedly connected with cover of work box (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010731980.8A CN111871751B (en) | 2020-07-27 | 2020-07-27 | Grading equipment for edible oil processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010731980.8A CN111871751B (en) | 2020-07-27 | 2020-07-27 | Grading equipment for edible oil processing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111871751A true CN111871751A (en) | 2020-11-03 |
| CN111871751B CN111871751B (en) | 2022-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010731980.8A Active CN111871751B (en) | 2020-07-27 | 2020-07-27 | Grading equipment for edible oil processing |
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| CN (1) | CN111871751B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112275406A (en) * | 2020-11-11 | 2021-01-29 | 闻德亮 | Categorised recovery unit of integrated circuit components and parts |
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| CN210753625U (en) * | 2019-09-19 | 2020-06-16 | 福建三明草本宝藏生物工程有限公司 | Filtering equipment is used in processing of glossy ganoderma spore powder |
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| KR101475696B1 (en) * | 2014-09-17 | 2014-12-24 | (주)우리비앤비 | Disopsal devic for by-product of slaughter pig |
| CN108325807A (en) * | 2017-12-21 | 2018-07-27 | 臧倩 | A kind of civil engineering portable type Sand screen |
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| CN111871751B (en) | 2022-07-22 |
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