CN107051854B - The screening compound fertilizer device of automated cleaning - Google Patents
The screening compound fertilizer device of automated cleaning Download PDFInfo
- Publication number
- CN107051854B CN107051854B CN201611212679.6A CN201611212679A CN107051854B CN 107051854 B CN107051854 B CN 107051854B CN 201611212679 A CN201611212679 A CN 201611212679A CN 107051854 B CN107051854 B CN 107051854B
- Authority
- CN
- China
- Prior art keywords
- cleaning
- rotary screen
- air hose
- support frame
- scraper plate
- 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.)
- Expired - Fee Related
Links
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
- B07B1/18—Drum screens
- B07B1/22—Revolving drums
-
- 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
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
-
- 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
-
- 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
- B07B1/526—Cleaning with brushes or scrapers with scrapers
-
- 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
- B07B1/55—Cleaning with fluid jets
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
This patent discloses a kind of screening compound fertilizer devices of automated cleaning, are related to rotary screen cleaning plant；Including base, shell, rotary screen scraper cleaning portion and air blast cleaning portion, scraper cleaning portion includes support frame, scraper plate and cleaning brush, and the both ends of support frame are slidably connected on base, and scraper plate is fixed on the support frame, and cleaning brush is contacted with the top inner wall of rotary screen；Air blast cleaning portion includes air blower and cleaning air hose, and cleaning air hose is fixed inside the shell, and clears up the top that air hose is located at rotary screen, and air blower is connect with cleaning air hose, and cleaning air hose is equipped with several blowing holes towards rotary screen side wall；Rotary screen is divided into screening portion and pusher portion by a plane of rotary screen axis, the scraping wings of muti-piece spaced set is fixed on the inner wall in pusher portion, scraper plate is equipped with the gap passed through for scraping wings；When rotary screen rotation, support frame moves back and forth left and right, to can prevent scraping wings and scraper plate from interfering while clearing up binding material.
Description
Technical field
The present invention relates to rotary screen cleaning plants, and in particular to a kind of screening compound fertilizer device of automated cleaning.
Background technique
In field of compound fertilizer production, rotary screen is a kind of very strong screening plant of sieving capacity, but rotary screen is rotating through
Cheng Zhong, due to centrifugal force and storeroom mutual extrusion power, often on the interior compass screen surface of rotary screen sticky one layer it is compound
Fertilizer within a very short time just blocks sieve pore, has seriously affected screening effect.If manual cleaning, rotary screen can not be real
Row is totally-enclosed, will form biggish dust in operation process, is unfavorable for carrying out live manual cleaning, in addition manual cleaning increases labor
Dynamic load, in addition flying upward for dust causes production environment severe and the increase of material loss rate.
A kind of production compound fertilizer is disclosed application No. is 201010208009.3 Chinese patent to be cleared up automatically with rotary screen
Device；It include mainly transmission device and rapping apparatus, transmission device includes the drive sprocket being fixed on rotary screen main shaft and peace
Drive sprocket on rapping main shaft is connected by driving chain；The specific structure of rapping apparatus is that rapping main shaft passes through bearing
Device is mounted on rotary screen shell, on rapping main shaft be equipped with cam, cam is corresponding with retainer plate, by with rotary screen shell
Guide cylinder is fixed on right above retainer plate most vertex by the gusset of welding, and rapping ball is connected by being flexible coupling with lever, and is placed
In guide cylinder, lever is connected with the guiding fulcrum being welded on rotary screen shell.The device strikes rotary screen by rapping ball,
Vibrate the sieve of rotary screen, to complete to clear up, on the one hand which easily damages rotary screen sieve, on the other hand by
It should not be too large in vibration, therefore cleaning effect is bad.
In addition also there is the device that sieve is sieved by the automatic rolling barrel of hairbrush, primary structure is to fix hairbrush and be adjacent to rolling
Cleaning can be realized when rotary screen rolls in shaft screen side wall；If hairbrush is set to outside rotary screen, cleaning effect is still bad.By
In being equipped with helical blade in rotary screen, so that rotary screen can achieve the purpose that feeding while rolling, enable material not
It is sieved on the sieve of same level；If hairbrush is therefore arranged on the inside of rotary screen, helical blade will squeeze hairbrush, so that hair
Brush easily damages.
Summary of the invention
The purpose of the present invention is to provide a kind of screening compound fertilizer device of automated cleaning that can automatically clean rotary screen,
And improve cleaning effect.
In order to achieve the above objectives, base case of the invention is as follows:
The screening compound fertilizer device of automated cleaning includes base, shell and rotary screen, and the shell is fixed on base, outside
Shell lower part is equipped with discharge port, and the rotary screen is rotatably connected on base, and rotary screen is set in shell, is rotatablely connected on base
There is main shaft, main shaft is fixedly connected with the end of rotary screen；
It further include scraper cleaning portion and air blast cleaning portion, scraper cleaning portion includes that support frame, scraper plate and being fixed on is scraped
The both ends of cleaning brush on plate, support frame are slidably connected on base, and scraper plate is fixed on the support frame, and cleaning brush and rotary screen
Top inner wall contact；Air blast cleaning portion includes air blower and cleaning air hose, and cleaning air hose is fixed inside the shell, and clears up
Air hose is located at the top of rotary screen, and air blower connect with cleaning air hose, and cleaning air hose is equipped with several towards rotary screen side wall
Blowing holes；Rotary screen is divided into screening portion and pusher portion by a plane of the centre of gyration line of rotary screen, the pusher portion
The scraping wings of muti-piece spaced set is fixed on inner wall, scraper plate is equipped with the gap passed through for scraping wings, and scraping wings spiral
Setting；When rotary screen rotation, support frame moves back and forth left and right.
The principle of the screening compound fertilizer device of this programme automated cleaning is:
When work, main shaft drives rotary screen rotation, and cleaning air hose is fixed on support frame then always in rotary screen top
On cleaning brush by the tip contact always with rotary screen inner wall, but support frame will drive cleaning brush along the axis direction of rotary screen
It moves back and forth.When to rotary screen rotation, the scraper plate in scraper cleaning portion will wipe the bulk materials being attached on rotary screen inner wall off,
And cleaning brush loosens the material being embedded in rotary screen sieve opening, then cooperates the cleaning air hose in air blast cleaning portion from rotary screen
Outside air blast achievees the purpose that clear up automatically so as to the material cleaning that will be embedded in the sieve pore of rotary screen.
Rotary screen is made of multistage, and each section of sieve pore is different, so that different size of compound fertilizer granules are screened,
Therefore rotary screen has progradation to material by scraping wings, so that material be enable to sieve with different size in material screening
The screen contact in hole sufficiently sieves material.During rotary screen rolls, to prevent pusher dash-board injury scraper plate and cleaning
Brush, when the pusher portion of rotary screen turns to top, scraping wings will enter in the gap on scraper plate, and in rotary screen rotation process
In, support frame also forward slip, to prevent scraping wings from squeezing scraper plate.When the screening portion of rotary screen turns to top, support
Frame then slides backward and returns to initial position, so that next scraping wings can be again introduced into the gap on scraper plate；To prevent from scraping
Plate and scraping wings interference.
The beneficial effect that this programme generates is:
(1) this programme enhances cleaning efficiency by setting scraper cleaning portion and air blast cleaning portion；Wherein scraper plate can be with
Clean up the binding material of bulk；Cleaning brush can clean up material of the part adhesive in sieve pore, or be bonded in sieve pore
Material loosen, then clear up air hose the material loosened can be blown out from sieve pore.
(2) rotary screen is divided into screening portion and pusher portion by this programme, and slides support frame reciprocally, thus anti-thrust
Flitch squeezes cleaning brush, and the service life of cleaning brush can be improved.
(3) rotary screen can generate relative motion with scraper plate, cleaning brush and cleaning air hose in rotation, thus sieving
Rotary screen can be cleared up automatically when material.
Preferred embodiment one: advanced optimizing as to base case, and the end of support frame as described above is equipped with linkage block, described
Rotary screen end is equipped with cylindrical cam, and linkage block and cylindrical cam cooperate.Support frame is driven to move back and forth by cylindrical cam, it can
Keep drive mechanism simple, and cost is relatively low, is conducive to maintenance.
Preferred embodiment two: advanced optimizing as to base case, and the cleaning brush is made of several bristles, bristle card
It closes in the end of scraper plate, bristle lengths are 2~3cm；Bristle is shorter, and rigidity is better, then the effect for clearing up material is better；In addition
Bristle is shorter, the material of bulk can be cleared up to avoid bristle, to damage cleaning brush.
Preferred embodiment three: advanced optimizing as to base case, the cleaning brush and cleaning air hose be staggered 20 °~
40 °, and cleaning brush and cleaning air hose are followed successively by along the rotation direction of rotary screen；Then the sieve of rotary screen will pass through scraper cleaning portion
Cleaning after, cleared up using air blast cleaning portion, i.e., first the binding material of bulk cleared up, then clear up powder again
Shape material, so as to more thorough rotary screen, so that scraper cleaning portion and air blast cleaning portion can play optimal performance.
Preferred embodiment four: advanced optimizing as to base case, and the rotary screen tilts 5 °~10 ° along the horizontal plane；
When screening portion turns to the lower part of rotary screen, then material can slide downward, to extend material and sieves different in rotary screen
Time of contact, with abundant material screening.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the screening compound fertilizer Installation practice of automated cleaning of the present invention.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail:
Appended drawing reference in Figure of description includes: base 10, main shaft 11, shell 20, discharge port 21, rotary screen 30, pushes away
Flitch 31, scraper cleaning portion 40, support frame 41, cylindrical cam 42, linkage block 43, annular groove 44, scraper plate 45, cleaning brush 46,
Gap 47, air blast cleaning portion 50, air blower 51, cleaning air hose 52.
Embodiment is substantially as shown in Figure 1:
The screening compound fertilizer device of the automated cleaning of the present embodiment includes base 10, shell 20 and rotary screen 30, shell 20
It is fixed on base 10,20 lower part of shell is set there are three discharge port 21；Rotary screen 30 is made of three sections of sieves, and rotary screen 30 rotates
It is connected on base 10, and rotary screen 30 is set in shell 20 and is obliquely installed, the tilt angle of rotary screen 30 is 8 °, rotary screen
30 sieve pore is sequentially increased from lower end to upper end.The main shaft 11 driven by variable-frequency motor, main shaft 11 are rotatably connected on base 10
It is fixedly connected with the end of rotary screen 30, so that main shaft 11 can drive rotary screen 30 to rotate.
Also scraper cleaning portion 40 and air blast cleaning portion 50, scraper cleaning portion 40 include support frame 41,45 and of scraper plate in shell
It is fastened on the cleaning brush 46 of 45 upper end of scraper plate.Support frame 41 is a square axis, and the both ends of support frame 41 are slidably connected at base 10
On, the lower end of scraper plate 45 is fixed on support frame 41, and cleaning brush 46 is contacted with the top inner wall of rotary screen 30, and cleaning brush 46
It is made of several bristles, the length of bristle is 3cm.The end of support frame 41 is welded with linkage block 43, and 30 end of rotary screen is equipped with
Cylindrical cam 42, cylindrical cam 42 are equipped with annular groove 44.Linkage block 43 is fastened in annular groove 44, thus convex with cylinder
42 cooperation of wheel；Then when rotary screen 30 rotates, support frame 41 can be driven by mutually matched linkage block 43 and cylindrical cam 42
Along its axially reciprocating.Rotary screen 30 is divided for screening portion and pusher by a plane of the centre of gyration line of rotary screen 30
Portion, be fixed with the scraping wings 31 of five pieces of spaced sets on the inner wall in pusher portion, and scraper plate 45 is equipped with to be passed through for scraping wings 31
Gap, and 31 spiral of scraping wings is arranged；When rotary screen 30 rotates, and scraping wings 31 and scraper plate 45 meet, scraping wings 31 will be from
Gap on scraper plate 45 is passed through.
Air blast cleaning portion 50 includes air blower 51 and cleaning air hose 52, and cleaning air hose 52 is fixed in shell 20, and is cleared up
Air hose 52 is located at the top of rotary screen 30, and air blower 51 is connect with cleaning air hose 52, and cleaning air hose 52 is equipped with several towards rolling
The blowing holes of 30 side wall of shaft screen.In the present embodiment, cleaning brush 46 and cleaning air hose 52 are staggered 30 °, along the rotation side of rotary screen 30
To be followed successively by cleaning brush 46 and cleaning air hose 52.Scraper cleaning is carried out so as to the binding material first to bulk, is then cleared up again
Powder material, so as to more thorough rotary screen 30 so that scraper cleaning portion 40 and air blast cleaning portion 50 can play it is optimal
Performance.
When work, main shaft 11 drives rotary screen 30 to rotate, and the scraper plate 45 in scraper cleaning portion 40, which will be wiped off, is attached to rotary screen
Bulk materials on 30 inner walls, and cleaning brush 46 loosens the material being embedded in 30 sieve pore of rotary screen, then cooperates air blast clear
The cleaning outside air blast of the air hose 52 from rotary screen 30 in reason portion 50, it is clear so as to which the material in the sieve pore of rotary screen 30 will be embedded in
Reason, achievees the purpose that clear up automatically.
When 30 material screening of rotary screen, scraping wings 31 has progradation to material, to enable material and different size
The screen contact of sieve pore sufficiently sieves material.During rotary screen 30 rolls, when the pusher portion of rotary screen 30 rotates
When to top, scraping wings 31 will enter in the gap on scraper plate 45, and in 30 rotation process of rotary screen, and support frame 41 is also forward
Sliding, to prevent scraping wings 31 from squeezing scraper plate 45.When the screening portion of rotary screen 30 turns to top, support frame 41 is then backward
Initial position is slided and returns to, so that next scraping wings 31 can be again introduced into the gap on scraper plate 45, to prevent scraper plate 45
Interfere with scraping wings 31.When screening portion turns to the lower part of rotary screen 30, since rotary screen 30 is obliquely installed, then material can be to
Lower slider, to extend the time of contact of material from different sieves in rotary screen 30, with abundant material screening.
What has been described above is only an embodiment of the present invention, and the common sense such as well known specific structure and characteristic are not made herein in scheme
Excessive description.It, without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art
Several modifications and improvements are made, these also should be considered as protection scope of the present invention, these all will not influence what the present invention was implemented
Effect and patent practicability.The scope of protection required by this application should be based on the content of the claims, in specification
The records such as specific embodiment can be used for explaining the content of claim.
Claims (5)
1. a kind of screening compound fertilizer device of automated cleaning, including base, shell and rotary screen, the shell are fixed on base
On, outer casing underpart is equipped with discharge port, and the rotary screen is rotatably connected on base, and rotary screen is set in shell, turns on base
Dynamic to be connected with main shaft, main shaft is fixedly connected with the end of rotary screen；
It is characterized in that, further including scraper cleaning portion and air blast cleaning portion, scraper cleaning portion includes support frame, scraper plate and consolidates
The both ends of the cleaning brush being scheduled on scraper plate, support frame are slidably connected on base, and scraper plate is fixed on the support frame, and cleaning brush with
The top inner wall of rotary screen contacts；Air blast cleaning portion includes air blower and cleaning air hose, and cleaning air hose is fixed inside the shell,
And the top that air hose is located at rotary screen is cleared up, air blower is connect with cleaning air hose, and cleaning air hose is equipped with several towards rotary screen
The blowing holes of side wall；Rotary screen is divided into screening portion and pusher portion by a plane of the centre of gyration line of rotary screen, it is described to push away
The scraping wings of muti-piece spaced set is fixed on the inner wall in material portion, scraper plate is equipped with the gap passed through for scraping wings, and pusher
The setting of plate spiral；When rotary screen rotation, support frame moves back and forth left and right.
2. the screening compound fertilizer device of automated cleaning according to claim 1, which is characterized in that the end of support frame as described above
Equipped with linkage block, the rotary screen end is equipped with cylindrical cam, and linkage block and cylindrical cam cooperate.
3. the screening compound fertilizer device of automated cleaning according to claim 2, which is characterized in that the cleaning brush is by several
Bristle composition, bristle are fastened on the end of scraper plate, and bristle lengths are 2~3cm.
4. the screening compound fertilizer device of automated cleaning according to claim 3, which is characterized in that the cleaning brush and cleaning
Air hose is staggered 20 °~40 °, and is followed successively by cleaning brush and cleaning air hose along the rotation direction of rotary screen.
5. the screening compound fertilizer device of automated cleaning according to claim 4, which is characterized in that the rotary screen is along horizontal
Face tilts 5 °~10 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611212679.6A CN107051854B (en) | 2016-12-25 | 2016-12-25 | The screening compound fertilizer device of automated cleaning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611212679.6A CN107051854B (en) | 2016-12-25 | 2016-12-25 | The screening compound fertilizer device of automated cleaning |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107051854A CN107051854A (en) | 2017-08-18 |
| CN107051854B true CN107051854B (en) | 2019-01-29 |
Family
ID=59623532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611212679.6A Expired - Fee Related CN107051854B (en) | 2016-12-25 | 2016-12-25 | The screening compound fertilizer device of automated cleaning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107051854B (en) |
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| CN107912094A (en) * | 2017-12-23 | 2018-04-17 | 郑州源冉生物技术有限公司 | A kind of automatic plow adds the soil quick-restoring device of soil |
| CN108927328A (en) * | 2018-08-08 | 2018-12-04 | 盐城市联鑫钢铁有限公司 | A kind of online screening plant of coverter pig lime |
| CN109772679A (en) * | 2019-03-21 | 2019-05-21 | 南通飞跃重型工程设备制造有限公司 | A kind of self-cleaning type drum sieve |
| CN110102462A (en) * | 2019-05-23 | 2019-08-09 | 河南科润德机械有限公司 | A kind of material exclusion device of Double-layer screen |
| CN111589707A (en) * | 2020-05-18 | 2020-08-28 | 赖新亮 | Roller type dust-free stone removing method for bean processing |
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| CN112208060A (en) * | 2020-08-28 | 2021-01-12 | 安徽越洋达新能源科技有限公司 | Feeding device is used in power support production |
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| CN112934693A (en) * | 2021-02-02 | 2021-06-11 | 格林美(武汉)城市矿山产业集团有限公司 | Self-cleaning drum screen |
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| CN115121481B (en) * | 2022-06-14 | 2023-12-19 | 扬州市凯耀机械有限公司 | Multistage sieving mechanism |
| CN115283237A (en) * | 2022-09-28 | 2022-11-04 | 江苏百草恋食品科技有限公司 | Screening equipment for food additive preparation |
| CN115638417B (en) * | 2022-11-12 | 2023-07-25 | 江苏品德环保科技有限公司 | Pretreatment device before incineration of household garbage |
| CN116943813B (en) * | 2023-08-23 | 2024-05-14 | 广东冠星陶瓷企业有限公司 | Special ceramic production system and process thereof |
| CN117654762B (en) * | 2024-02-02 | 2024-04-30 | 中际山河科技有限责任公司 | Cylindrical ore washer with angle adjusting function |
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| CN2032509U (en) * | 1988-05-21 | 1989-02-15 | 湖州联合收割机厂 | Cleaning device for drum screening machine |
| KR100482824B1 (en) * | 2003-04-02 | 2005-04-14 | 주식회사 포스벨 | Device for preventing clogging of screen hole of wast selector. |
| KR101460659B1 (en) * | 2012-12-03 | 2014-11-20 | 주식회사 포스벨 | Apparatus for preventing clogging of screen hole of soil sorting machine |
| CN205701383U (en) * | 2016-05-23 | 2016-11-23 | 王兴武 | A kind of reciprocal type automatic cleaning formula trommelling machine |
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2016
- 2016-12-25 CN CN201611212679.6A patent/CN107051854B/en not_active Expired - Fee Related
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| CN107051854A (en) | 2017-08-18 |
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Effective date of registration: 20210106 Address after: Room 910, unit 1, building 2 and office 1, Shimao square, Yunlong District, Xuzhou City, Jiangsu Province, 221000 Patentee after: Xuzhou Zhicheng Accounting Service Co.,Ltd. Address before: 402185 Hegeng Town, Yongchuan District, Chongqing Patentee before: CHONGQING CITY YONGCHUAN DISTRICT TIANTANG CHEMICAL FACTORY |
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