CN113210251A - Grain dust collector with straw separating function - Google Patents
Grain dust collector with straw separating function Download PDFInfo
- Publication number
- CN113210251A CN113210251A CN202110388360.3A CN202110388360A CN113210251A CN 113210251 A CN113210251 A CN 113210251A CN 202110388360 A CN202110388360 A CN 202110388360A CN 113210251 A CN113210251 A CN 113210251A
- Authority
- CN
- China
- Prior art keywords
- dust
- collection bin
- grain
- dust collection
- sieve
- 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.)
- Pending
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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
- B07B1/34—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens jigging or moving to-and-fro perpendicularly or approximately perpendiculary to the plane of the screen
- B07B1/343—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens jigging or moving to-and-fro perpendicularly or approximately perpendiculary to the plane of the screen with mechanical drive elements other than electromagnets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/04—Cleaning by suction, with or without auxiliary action
Abstract
The invention discloses a grain dust removal device with a straw separation function, which comprises a base, wherein a conveying belt is obliquely arranged on the upper part of the base, mounting frames are fixedly connected to the tops of two sides of the base, and a vibrating screen, a dust hood, a collection bin and a dust collection bin are fixedly arranged between the two groups of mounting frames from right to left in sequence; a guide pipe is fixedly connected between the top of the dust hood and the right side wall of the collection bin, the collection bin is communicated with the upper part of the collection bin, a pulse dust collection bag is installed in the inner cavity of the dust collection bin, and a fan is fixedly installed on the left side of the dust collection bin; the dust collection device is simple in structure, convenient and practical, and can conveniently collect and recover dust attached to the surface of grain, so that the dust collection effect is enhanced, and the damage to the pulse dust collection bag caused by the fact that straw is sucked into the dust collection bin is avoided.
Description
The technical field is as follows:
the invention relates to the field of grain processing, in particular to a grain dust removal device with a straw separation function.
Background art:
the screening device utilizes the sieve to make fine materials smaller than the sieve mesh penetrate through the sieve surface and coarse materials larger than the sieve mesh stay on the sieve surface, thereby completing the process of separating coarse materials from fine materials. The separation process can be regarded as consisting of two stages, material stratification and fine grain screening. The material layering is the condition for completing the separation, the fine particles are suitable for screening for the purpose of separation, and the application of a screening device is also indispensable in agricultural processing production. In the one step, the efficient screening device obtains high-quality grain products in the production process of agricultural processing, and the existing screening device is complex in structure and poor in screening effect. In the collection of cereal, the processing procedure, need professional shaker to get rid of impurity, still difficult impurity such as doping a small amount of wheat straw, rice husk or even dust still need remove dust to it and handle, collect by pulse dust bag, and impurity such as straw rice husk can damage pulse dust bag, influences dust collection effect, needs separate it.
The invention content is as follows:
the invention aims to provide a grain dust removal device with a straw separation function, which can conveniently collect and recover dust attached to the surface of grain, enhance the dust removal effect and prevent the damage of a pulse dust collection bag caused by the suction of straw into a dust collection bin.
The technical problem to be solved by the invention is realized by adopting the following technical scheme: a grain dust removal device with a straw separation function comprises a base, wherein a conveying belt is obliquely arranged on the upper portion of the base, mounting frames are fixedly connected to the tops of two sides of the base, and a vibrating screen, a dust hood, a collection bin and a dust collection bin are fixedly arranged between the two groups of mounting frames from right to left in sequence;
a guide pipe is fixedly connected between the top of the dust hood and the right side wall of the collection bin, the collection bin is communicated with the upper part of the collection bin, a pulse dust collection bag is installed in the inner cavity of the dust collection bin, and a fan is fixedly installed on the left side of the dust collection bin;
and a conveyor is fixedly arranged at the bottom of the collection bin.
In passing through the leading-in shale shaker of feeder hopper with grain, carry out preliminary branch sieve, grain is derived by the shale shaker bottom, fall to the conveyer belt on, grain is at the in-process of whereabouts, the fan is removed dust by the suction hood through the pipe and is handled it, be attached to in dust and the straw on grain surface are inhaled and collect the storehouse, under the action of gravity, the straw falls to collecting the storehouse inside through the through-hole of pipe bottom, the dust is inhaled in the dust collection storehouse, collect the dust by the pulse dust bag. And the straw is prevented from entering the pulse dust collection bag to damage the pulse dust collection bag.
Preferably, the bottom fixed mounting of base has four groups to remove the wheel, can make things convenient for the transportation of device to remove.
Preferably, the right side top fixed mounting of shale shaker has the feeder hopper, from top to bottom once be provided with first sieve and second sieve in the shale shaker inner chamber, first discharge gate and second discharge gate have been seted up to the lateral wall of shale shaker left end, are located the top of first sieve and the below of second sieve respectively, can strengthen the branch sieve effect.
Preferably, the inner chamber top both ends of collecting the storehouse are rotated and are connected with reciprocal lead screw, the upper portion right side fixed mounting who collects the storehouse has first motor, the inner chamber upper portion swing joint who collects the storehouse has the walking beam, the walking beam passes through screw thread screwed connection with reciprocal lead screw, a plurality of taking off of the bottom side fixedly connected with of walking beam are grabbed, and it is rotatory to drive reciprocal lead screw through the motor, makes the walking beam be reciprocating motion at its top, and control is taken off to grab and is blockked the straw and fall into in collecting the storehouse, avoids the straw to be inhaled in the dust collection storehouse, causes the damage with pulse dust bag.
Preferably, the both sides top fixedly connected with baffle of conveyer belt can avoid cereal grain to fall down, plays limit function.
Preferably, the left end swing joint of second sieve has the articulated slab, and is two sets of it is connected with eccentric commentaries on classics roller to rotate between the baffle, the lateral wall fixed mounting of baffle has the second motor, eccentric commentaries on classics roller is located the downside of articulated slab, the articulated slab is located the below of suction hood, and the motor drives eccentric commentaries on classics roller rotation, can be with the swing that the articulated slab does not stop, can be raised grain when the blanking, makes the fluffy bottom that is located the suction hood of grain, can conveniently collect and retrieve the dust that adheres to grain surface, reinforcing dust removal effect.
The invention has the beneficial effects that: the grain is guided into the vibrating screen through the feed hopper to be primarily screened, the grain is guided out from the bottom of the vibrating screen and falls onto the conveying belt, the dust is removed by the dust hood through the guide pipe by the fan in the falling process of the grain, the dust and the straw attached to the surface of the grain are sucked into the collecting bin, the straw falls into the collecting bin through the through hole at the bottom of the guide pipe under the action of gravity, the dust is sucked into the dust collecting bin, the dust is collected by the pulse dust collecting bag, the reciprocating screw rod is driven to rotate by the motor, the movable beam reciprocates at the top of the movable beam, the straw is prevented from falling into the collecting bin by the control grab, the straw is prevented from being sucked into the dust collecting bin, the pulse dust collecting bag is damaged, the motor drives the eccentric rotating roller to rotate, the hinged plate can swing without stopping the blanking, the grain can be lifted when the grain is lifted, and the grain is fluffy positioned at the bottom of the dust hood, can conveniently collect and retrieve the dust that adheres to grain surface, reinforcing dust removal effect.
Description of the drawings:
in order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts;
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the collection chamber of the present invention;
FIG. 3 is an enlarged view of the invention at A;
FIG. 4 is a schematic view of the structure of the eccentric roller according to the present invention;
FIG. 5 is a schematic structural view of a walking beam and a grab in the present invention;
wherein: 1. a base; 2. vibrating screen; 3. a feed hopper; 4. a conveyor belt; 5. a dust hood; 6. a collection bin; 7. a conduit; 8. a baffle plate; 9. a conveyor; 10. a dust collection bin; 11. a pulse dust collection bag; 12. a fan; 13. a mounting frame; 14. a moving wheel; 15. a first motor; 16. a reciprocating screw rod; 17. a moving beam; 18. grabbing; 19. first discharging; 20. a second discharge port; 21. a first screen deck; 22. a second screen deck; 23. a hinge plate; 24. a second motor; 25. and (4) an eccentric rotating roller.
The specific implementation mode is as follows:
in order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
Example 1: as shown in fig. 1-5, a grain dust collector with straw separating function, includes base 1, its characterized in that: the upper part of the base 1 is obliquely provided with a conveying belt 4, the tops of two sides of the base 1 are fixedly connected with mounting frames 13, and a vibrating screen 2, a dust hood 5, a collection bin 6 and a collection bin 10 are fixedly arranged between the two groups of mounting frames 13 from right to left;
a guide pipe 7 is fixedly connected between the top of the dust hood 5 and the right side wall of the collection bin 6, the collection bin 6 is communicated with the upper part of the collection bin 10, a pulse dust collection bag 11 is installed in the inner cavity of the dust collection bin 10, and a fan 12 is fixedly installed on the left side of the dust collection bin 10;
the bottom of the collecting bin 6 is fixedly provided with a conveyor 9.
Pass through during the leading-in shale shaker of feeder hopper with grain, carry out preliminary branch sieve, grain is derived by the shale shaker bottom, fall to the conveyer belt on, grain is at the in-process of whereabouts, the fan is removed dust by the suction hood by the pipe and is handled it, be attached to in dust and the straw on grain surface are inhaled and collect the storehouse, under the action of gravity, the through-hole that the straw passes through the pipe bottom falls to collecting the storehouse inside, the dust is inhaled in the dust collection storehouse, collect the dust by the pulse dust bag, prevent that the straw from getting into the pulse dust bag and causing the damage to it.
Preferably, four sets of moving wheels 14 are fixedly mounted at the bottom of the base 1, so that the device can be conveniently transported and moved.
Preferably, the right side top fixed mounting of shale shaker 2 has feeder hopper 3, be provided with first sieve 21 and second sieve 22 from top to bottom once in the 2 inner chambers of shale shaker, first discharge gate 19 and second discharge gate 20 have been seted up to the lateral wall of 2 left ends of shale shaker, are located the top of first sieve 21 and the below of second sieve 22 respectively, can strengthen the branch sieve effect.
Preferably, the inner chamber top both ends of collecting the storehouse 6 are rotated and are connected with reciprocal lead screw 16, the upper portion right side fixed mounting who collects the storehouse 6 has first motor 15, the inner chamber upper portion swing joint who collects the storehouse 6 has walking beam 17, walking beam 17 passes through screw thread screwed connection with reciprocal lead screw 16, 18 are grabbed to a plurality of rakes of bottom side fixedly connected with of walking beam 17, and it is rotatory to drive reciprocal lead screw through the motor, makes the walking beam be reciprocating motion at its top, and control is grabbed and is blockked the straw to fall into in collecting the storehouse, avoids the straw to be inhaled in the dust collection storehouse, causes the damage with pulse dust bag.
Preferably, the top parts of the two sides of the conveying belt 4 are fixedly connected with baffle plates 8, so that grains can be prevented from falling down, and a limiting function is achieved.
Example 2: as shown in fig. 1-5, a grain dust collector with straw separating function, includes base 1, its characterized in that: the upper part of the base 1 is obliquely provided with a conveying belt 4, the tops of two sides of the base 1 are fixedly connected with mounting frames 13, and a vibrating screen 2, a dust hood 5, a collection bin 6 and a collection bin 10 are fixedly arranged between the two groups of mounting frames 13 from right to left;
a guide pipe 7 is fixedly connected between the top of the dust hood 5 and the right side wall of the collection bin 6, the collection bin 6 is communicated with the upper part of the collection bin 10, a pulse dust collection bag 11 is installed in the inner cavity of the dust collection bin 10, and a fan 12 is fixedly installed on the left side of the dust collection bin 10;
the bottom of the collecting bin 6 is fixedly provided with a conveyor 9.
Pass through during the leading-in shale shaker of feeder hopper with grain, carry out preliminary branch sieve, grain is derived by the shale shaker bottom, fall to the conveyer belt on, grain is at the in-process of whereabouts, the fan is removed dust by the suction hood by the pipe and is handled it, be attached to in dust and the straw on grain surface are inhaled and collect the storehouse, under the action of gravity, the through-hole that the straw passes through the pipe bottom falls to collecting the storehouse inside, the dust is inhaled in the dust collection storehouse, collect the dust by the pulse dust bag, prevent that the straw from getting into the pulse dust bag and causing the damage to it.
Preferably, four sets of moving wheels 14 are fixedly mounted at the bottom of the base 1, so that the device can be conveniently transported and moved.
Preferably, the right side top fixed mounting of shale shaker 2 has feeder hopper 3, be provided with first sieve 21 and second sieve 22 from top to bottom once in the 2 inner chambers of shale shaker, first discharge gate 19 and second discharge gate 20 have been seted up to the lateral wall of 2 left ends of shale shaker, are located the top of first sieve 21 and the below of second sieve 22 respectively, can strengthen the branch sieve effect.
Preferably, the inner chamber top both ends of collecting the storehouse 6 are rotated and are connected with reciprocal lead screw 16, the upper portion right side fixed mounting who collects the storehouse 6 has first motor 15, the inner chamber upper portion swing joint who collects the storehouse 6 has walking beam 17, walking beam 17 passes through screw thread screwed connection with reciprocal lead screw 16, 18 are grabbed to a plurality of rakes of bottom side fixedly connected with of walking beam 17, and it is rotatory to drive reciprocal lead screw through the motor, makes the walking beam be reciprocating motion at its top, and control is grabbed and is blockked the straw to fall into in collecting the storehouse, avoids the straw to be inhaled in the dust collection storehouse, causes the damage with pulse dust bag.
Preferably, the top parts of the two sides of the conveying belt 4 are fixedly connected with baffle plates 8, so that grains can be prevented from falling down, and a limiting function is achieved.
Preferably, the left end swing joint of second sieve 22 has articulated slab 23, and is two sets of it is connected with eccentric roller 25 to rotate between the baffle 8, the lateral wall fixed mounting of baffle 8 has second motor 24, eccentric roller 25 is located the downside of articulated slab 23, articulated slab 23 is located the below of suction hood 5, and the motor drives eccentric roller rotation, can be with the swing that the articulated slab does not stop, can be raised grain when the blanking, makes the fluffy bottom that is located the suction hood of grain, can conveniently collect and retrieve the dust that adheres to grain surface, reinforcing dust removal effect.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a grain dust collector with straw separating function, includes base (1), its characterized in that: the upper part of the base (1) is obliquely provided with a conveying belt (4), the tops of two sides of the base (1) are fixedly connected with mounting frames (13), and a vibrating screen (2), a dust collection cover (5), a collection bin (6) and a collection bin (10) are fixedly arranged between the two groups of mounting frames (13) from right to left in sequence;
a guide pipe (7) is fixedly connected between the top of the dust hood (5) and the right side wall of the collection bin (6), the collection bin (6) is communicated with the upper part of the collection bin (10), a pulse dust collection bag (11) is installed in the inner cavity of the dust collection bin (10), and a fan (12) is fixedly installed on the left side of the dust collection bin (10);
and a conveyor (9) is fixedly arranged at the bottom of the collection bin (6).
2. The grain dedusting device with the straw separating function as claimed in claim 1, wherein: four groups of moving wheels (14) are fixedly arranged at the bottom of the base (1).
3. The grain dedusting device with the straw separating function as claimed in claim 1, wherein: the right side top fixed mounting of shale shaker (2) has feeder hopper (3), from top to bottom once be provided with first sieve (21) and second sieve (22) in shale shaker (2) inner chamber, first discharge gate (19) and second discharge gate (20) have been seted up to the lateral wall of shale shaker (2) left end, are located the top of first sieve (21) and the below of second sieve (22) respectively.
4. The grain dedusting device with the straw separating function as claimed in claim 1, wherein: the utility model discloses a reciprocating screw rod (16) is connected with in the rotation of the inner chamber top both ends of collecting storehouse (6), the upper portion right side fixed mounting who collects storehouse (6) has first motor (15), the inner chamber upper portion swing joint who collects storehouse (6) has walking beam (17), walking beam (17) and reciprocating screw rod (16) pass through screw thread screwed connection, the bottom side fixedly connected with of walking beam (17) is a plurality of taking off and grabs (18).
5. The grain dedusting device with the straw separating function as claimed in claim 1, wherein: the tops of two sides of the conveying belt (4) are fixedly connected with baffle plates (8).
6. The grain dedusting device with the straw separating function as claimed in claim 5, wherein: the left end swing joint of second sieve (22) has articulated slab (23), and is two sets of it is connected with eccentric roller (25) to rotate between baffle (8), the lateral wall fixed mounting of baffle (8) has second motor (24), eccentric roller (25) are located the downside of articulated slab (23), articulated slab (23) are located the below of suction hood (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110388360.3A CN113210251A (en) | 2021-04-12 | 2021-04-12 | Grain dust collector with straw separating function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110388360.3A CN113210251A (en) | 2021-04-12 | 2021-04-12 | Grain dust collector with straw separating function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113210251A true CN113210251A (en) | 2021-08-06 |
Family
ID=77086934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110388360.3A Pending CN113210251A (en) | 2021-04-12 | 2021-04-12 | Grain dust collector with straw separating function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113210251A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116851338A (en) * | 2023-09-04 | 2023-10-10 | 浩宸建设科技有限公司 | Stone washing and mud removing device for highway engineering construction |
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| CN107670991A (en) * | 2017-10-31 | 2018-02-09 | 汤惠增 | A kind of soybean planting seed cleaning equipment |
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| CN208786933U (en) * | 2018-09-18 | 2019-04-26 | 山东省巨野粮食储备库 | A kind of grain high effect dust cleaner |
| CN209918324U (en) * | 2019-04-01 | 2020-01-10 | 安徽云龙粮机有限公司 | Combined vibrating screen dust removing device |
| CN112275630A (en) * | 2020-10-10 | 2021-01-29 | 安徽华宇机械制造有限公司 | A dust collector for grain sieve separator |
| CN112387575A (en) * | 2020-11-24 | 2021-02-23 | 安徽神健粮食机械设备有限公司 | Environment-friendly cereal cleaning device |
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| US4840727A (en) * | 1981-12-30 | 1989-06-20 | Humphrey Cecil T | Double bank grain cleaner and aspirator therefor |
| JPH08117622A (en) * | 1994-10-26 | 1996-05-14 | Iseki & Co Ltd | Hulled rice paddy separator |
| JP2001340775A (en) * | 2000-05-31 | 2001-12-11 | Seirei Ind Co Ltd | Dust removing device of shaking husker |
| KR20070061306A (en) * | 2006-09-18 | 2007-06-13 | 주식회사 광진이엔지 | Blow-sorting device |
| CN200963626Y (en) * | 2006-10-26 | 2007-10-24 | 杨永海 | Complex grain cleaner with vibrating screen and specific density screen up-down equipped |
| CN200977509Y (en) * | 2006-12-05 | 2007-11-21 | 徐水龙 | Fanning dressing sifter with vertical air suction channel |
| CN201592170U (en) * | 2009-12-28 | 2010-09-29 | 安徽省界首市云龙粮机配套工程有限公司 | Multifunctional grain wind power cleaner |
| CN201720189U (en) * | 2010-03-17 | 2011-01-26 | 沈一青 | Mobile vibration winnowing sieve |
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| CN108160484A (en) * | 2017-11-28 | 2018-06-15 | 深圳润丰投资咨询有限公司 | A kind of agricultural gravity paddy is rough to efficiently separate drying unit |
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| CN208786933U (en) * | 2018-09-18 | 2019-04-26 | 山东省巨野粮食储备库 | A kind of grain high effect dust cleaner |
| CN209918324U (en) * | 2019-04-01 | 2020-01-10 | 安徽云龙粮机有限公司 | Combined vibrating screen dust removing device |
| CN112275630A (en) * | 2020-10-10 | 2021-01-29 | 安徽华宇机械制造有限公司 | A dust collector for grain sieve separator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116851338A (en) * | 2023-09-04 | 2023-10-10 | 浩宸建设科技有限公司 | Stone washing and mud removing device for highway engineering construction |
| CN116851338B (en) * | 2023-09-04 | 2023-11-17 | 浩宸建设科技有限公司 | Stone washing and mud removing device for highway engineering construction |
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