CN113758774A - Laboratory soil crushing and screening method - Google Patents
Laboratory soil crushing and screening method Download PDFInfo
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- CN113758774A CN113758774A CN202110929869.4A CN202110929869A CN113758774A CN 113758774 A CN113758774 A CN 113758774A CN 202110929869 A CN202110929869 A CN 202110929869A CN 113758774 A CN113758774 A CN 113758774A
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- 239000002689 soil Substances 0.000 title claims abstract description 156
- 238000012216 screening Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 36
- 239000002245 particle Substances 0.000 claims abstract description 11
- 230000005484 gravity Effects 0.000 claims abstract description 6
- 238000001125 extrusion Methods 0.000 claims description 20
- 239000011148 porous material Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 5
- 239000000428 dust Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C1/00—Crushing or disintegrating by reciprocating members
- B02C1/02—Jaw crushers or pulverisers
- B02C1/04—Jaw crushers or pulverisers with single-acting jaws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/08—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within vertical containers
- B02C18/12—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within vertical containers with drive arranged below container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2866—Grinding or homogeneising
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Mechanical Engineering (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention relates to a laboratory soil crushing and screening method, wherein soil is manually placed into a feeding hole of a primary soil crushing mechanism, and the soil enters between a fixed jaw plate and a movable jaw plate; a rotating shaft of the first motor drives the belt to rotate, and drives the eccentric shaft to rotate through the belt, and the rotating eccentric shaft drives the movable jaw to swing left and right and then drives the movable jaw to swing left and right; the movable jaw plate which swings left and right extrudes and crushes soil between the fixed jaw plate and the movable jaw plate; the soil falls into the soil screening mechanism from the first discharge hole, and falls onto a screen of the soil screening box through the blanking pipe due to the gravity of the soil; a vibrating motor of the soil screening box drives the screen to vibrate through a vibrating rod; the crushed soil meeting the requirement of the particle size falls into the aggregate box through the holes on the screen, and the soil meeting the requirement is manually taken out from the aggregate box. The invention relates to a laboratory soil crushing and screening method, which effectively improves the soil crushing and screening quality.
Description
Technical Field
The invention relates to the technical field of laboratory soil sample pretreatment, in particular to a laboratory soil crushing and screening method.
Background
Along with the development of modernization, the road construction mileage in China is increasing at an unprecedented rate; therefore, road engineering needs to give different optimal solutions in the face of different geological soil conditions. For soil alone, various parameter index detections in various latitudes are required, such as: water content, density, specific gravity, consistency, temperature and humidity rebound and the like. When relevant parameter indexes are detected, the soil needs to have certain particle size for subsequent laboratory tests. Therefore, a pretreatment of soil crushing and soil screening is required in a laboratory.
Although the manpower is saved in the soil crushing and screening method of the existing soil crushing and screening integrated machine for the laboratory, the existing soil crushing mechanism cannot achieve the expected particle thickness degree in the process of crushing and grinding soil, and meanwhile, the existing soil screening mechanism is low in screening efficiency and easy to cause soil dust and particle escape to cause pollution to the laboratory. Therefore, a laboratory soil crushing and screening method which can improve the thickness degree of soil crushing and grinding and can improve the soil screening efficiency and prevent pollution to the laboratory is urgently needed in a road engineering soil detection laboratory.
Disclosure of Invention
The invention aims to overcome the defects and provide the laboratory soil crushing and screening method which can improve the thickness degree of soil crushing and grinding and can improve the soil screening efficiency and prevent pollution to a laboratory.
The purpose of the invention is realized as follows:
a laboratory soil crushing and screening method comprises the following steps:
step 1: manually putting soil into a feed inlet of the primary soil crushing mechanism, wherein the soil enters between the fixed jaw plate and the movable jaw plate;
step 2: a rotating shaft of the first motor drives a belt to rotate, an eccentric shaft is driven by the belt to rotate, and the rotating eccentric shaft drives a movable jaw to swing left and right and then drives a movable jaw plate connected with the movable jaw to swing left and right;
and step 3: the movable jaw plate which swings left and right extrudes and crushes soil between the fixed jaw plate and the movable jaw plate;
and 4, step 4: the soil falls into the soil screening mechanism from the first discharge hole, and falls onto a screen of the soil screening box through the blanking pipe due to the gravity of the soil;
and 5: a vibrating motor of the soil screening box drives the screen to vibrate through a vibrating rod;
step 6: the crushed soil meeting the requirement of the particle size falls into the aggregate box through the holes on the screen, and the soil meeting the requirement is manually taken out from the aggregate box.
The invention relates to a laboratory soil crushing and screening method.A soil enters a gap between a shell of a secondary soil crushing mechanism and an extrusion cone through a first discharge hole of a primary soil crushing mechanism; a rotating shaft of the second motor drives the gear box, and an output shaft of the gear box drives the extrusion cone to rotate clockwise; the extrusion cone rotates the soil that the extrusion is located between extrusion cone and the shell, and simultaneously, broken thread sword cuts the breakage and drives soil and removes to the second discharge gate to soil.
The invention relates to a laboratory soil crushing and screening method, wherein soil is discharged from a second discharge hole and falls into a soil screening mechanism.
The invention relates to a laboratory soil crushing and screening method, wherein soil which does not meet the requirements on a screen is poured into a feeding hole again for crushing until the soil meets the requirements.
Compared with the prior art, the invention has the beneficial effects that:
the laboratory soil crushing and screening method is provided with the primary soil crushing mechanism for primarily crushing the soil through the movable jaw plate and the fixed jaw plate, the primarily crushed soil enters the secondary soil crushing mechanism, and the soil is further crushed and ground through the extrusion cone and the shell, so that the soil can be effectively crushed and ground to the expected particle thickness, and the soil crushing quality is improved; the left and right column sleeves are respectively sleeved on the positioning columns to adjust the height of the soil screening box, the column sleeves are connected with a vibration motor, the vibration motor is connected with a fixing ring through a vibration rod, and a screen is arranged in the fixing ring; the vibration of the left vibrating motor and the right vibrating motor can drive the screen to vibrate so as to more effectively screen soil; a plurality of soil screening boxes top is provided with the baffle, soil dust and granule spill over the pollution to the laboratory in the time of the sieve soil of preventing.
Drawings
Fig. 1 is a schematic structural diagram of a laboratory soil crushing and screening machine based on the laboratory soil crushing and screening method of the invention.
Fig. 2 is a schematic structural view of the soil screening box in fig. 1.
Wherein: a primary soil crushing mechanism 1, a secondary soil crushing mechanism 2, a soil sieving mechanism 3, a mounting plate 4, a bottom plate 5, a first supporting column 6, a second supporting column 7, a collecting box 8, a handle 9,
A feed inlet 11, a movable jaw 12, an eccentric shaft 13, a belt 14, a first motor 15, a movable jaw plate 16, a fixed jaw plate 17, a spring pull rod 18, a spring 19,
A first discharge port 20, a shell 21, a crushing screw thread cutter 22, a gear box 23, a second motor 24, a second discharge port 25, an extrusion cone 26,
A positioning column 31, a blanking pipe 32, a baffle 33, a soil screening box 34,
Detailed Description
Referring to fig. 1 to 2, the invention relates to a laboratory soil crushing and screening method, which comprises the following steps:
step 1: manually putting soil into a feed inlet 11 of the primary soil crushing mechanism 1, wherein the soil enters between a fixed jaw plate 17 and a movable jaw plate 16;
step 2: a rotating shaft of a first motor 15 drives a belt 14 to rotate, and drives an eccentric shaft 13 to rotate through the belt 14, the rotating eccentric shaft 13 drives a movable jaw 12 to swing left and right, and then a movable jaw plate 16 connected with the movable jaw 12 is driven to swing left and right;
and step 3: the movable jaw plate 16 which swings left and right squeezes and crushes soil between the fixed jaw plate 17 and the movable jaw plate 16;
and 4, step 4: the soil after primary soil crushing enters a gap between the shell 21 and the extrusion cone 26 through the first discharge hole 20 of the primary soil crushing mechanism 1 due to the action of gravity;
and 5: the rotating shaft of the second motor 24 drives the gear box 23 to reduce the speed and increase the torque, and the output shaft of the gear box 23 drives the extrusion cone 26 to rotate clockwise;
step 6: the extrusion cone 26 rotates to extrude soil between the extrusion cone 26 and the shell 21, and meanwhile, the crushing screwer 22 cuts and crushes the soil and drives the soil to move towards the second discharge hole 25;
and 7: the soil falls into the soil screening mechanism 3 from the second discharge port 25, and falls onto the screen 44 of the soil screening box 34 through the discharge pipe 32 due to the gravity of the soil;
and 8: the vibrating motor 42 of the soil screening box 34 drives the screen 44 to vibrate through the vibrating rod 45, so as to screen soil particles;
and step 9: the crushed soil meeting the requirement of the particle size falls into the material collecting box 8 through the pores on the screen 44, and the soil meeting the requirement is manually taken out from the material collecting box 8; the unsatisfactory soil on the screen 44 is reground until it is satisfactory.
The laboratory soil crushing and screening method is based on a laboratory soil crushing and screening machine and comprises a primary soil crushing mechanism 1, a secondary soil crushing mechanism 2 and a soil screening mechanism 3 which are arranged from top to bottom; the soil screening mechanism 3 is arranged on the bottom plate 5; the primary soil crushing mechanism 1 comprises a feed inlet 11, a movable jaw plate 16 and a fixed jaw plate 17; the left side and the right side below the feed port 11 are respectively provided with a fixed jaw plate 17 and a movable jaw plate 16, the upper side of the movable jaw plate 16 is connected with a movable jaw 12, the center of the circle of the movable jaw 12 is connected with an eccentric shaft 13, and the rotation of the eccentric shaft 13 drives the movable jaw 12 to vibrate so as to drive the movable jaw plate 16 to swing left and right; the lower side of the movable jaw plate 16 is connected with a spring pull rod 18, the right side of the spring pull rod 18 is connected with a spring 19, the spring 19 can help the movable jaw plate 16 to reset when the movable jaw plate 16 swings, and soil between the movable jaw plate 16 and the fixed jaw plate 17 is primarily crushed through the swinging of the movable jaw plate 16; the secondary soil crushing mechanism 2 comprises a shell 21, a crushing screw thread cutter 22, a gear box 23 and a second motor 24; the top of the shell 21 is connected with a first discharge hole 20, the top of the first discharge hole 20 is connected with a gap between a movable jaw plate 16 and a fixed jaw plate 17, and soil primarily crushed by the primary soil crushing mechanism 1 is conveyed into the secondary soil crushing mechanism 2; an extrusion cone 26 is arranged in the shell 21, a crushing screwer 22 is spirally arranged on the extrusion cone 26, a second motor 24 is arranged below the shell 21, a rotating shaft of the second motor 24 is connected with a gear box 23, an output shaft of the gear box 23 is connected with the extrusion cone 26, and the extrusion cone 23 rotates to extrude and crush soil entering between the shell 21 and the extrusion cone 23 for secondary soil crushing; the side surface of the shell 21 is connected with a second discharge hole 25; through the primary jaw plate type primary soil crushing mechanism 1 and the further spiral type secondary soil crushing mechanism 2, the soil can be effectively crushed and ground to the expected particle thickness, and the soil crushing quality is improved; the soil screening mechanism 3 comprises a positioning column 31, a blanking pipe 32 and soil screening boxes 34, the bottom of the positioning column 31 is fixed on the bottom plate 5, the second discharge hole 25 is connected above the blanking pipe 32, a plurality of soil screening boxes 34 are arranged below the blanking pipe 32, and a baffle 33 is arranged above the soil screening boxes 34 to prevent soil dust and particles from escaping to pollute a laboratory during soil screening; the soil screening box 34 comprises column sleeves 41, a vibration motor 42, a fixing ring 43 and a screen 44, the left column sleeve 41 and the right column sleeve 41 are respectively sleeved on the positioning column 31, the height of the soil screening box 34 can be adjusted, the column sleeves 41 are connected with the vibration motor 42, the vibration motor 42 is connected with the fixing ring 43 through a vibration rod 45, and the screen 44 is arranged in the fixing ring 43; the left and right vibrating motors 42 can drive the screen 44 to vibrate to screen the soil more effectively;
further, a belt 14 is arranged on the eccentric shaft 13, and is connected with a rotating shaft of a first motor 15 through the belt 14;
further, a material collecting box 8 is arranged below the soil screening mechanism 3, a handle 9 is arranged on the material collecting box 8, and the material collecting box 8 is arranged above the bottom plate 5 and used for collecting soil meeting requirements;
further, 1 below of one-level hack mechanism is provided with mounting panel 4, and the right side of mounting panel 4 is fixed with second support column 7, and the bottom mounting of second support column 7 is at 5 right-hand members of bottom plate, and the left end of bottom plate 5 is fixed with first support column 6, and second grade hack mechanism 2 is fixed to the upper end of first support column 6.
In addition: it should be noted that the above-mentioned embodiment is only a preferred embodiment of the present patent, and any modification or improvement made by those skilled in the art based on the above-mentioned conception is within the protection scope of the present patent.
Claims (4)
1. A laboratory soil crushing and screening method is characterized in that: the method comprises the following steps:
step 1: manually putting soil into a feed inlet (11) of the primary soil crushing mechanism (1), wherein the soil enters between a fixed jaw plate (17) and a movable jaw plate (16);
step 2: a rotating shaft of the first motor (15) drives the belt (14) to rotate, and drives the eccentric shaft (13) to rotate through the belt (14), the rotating eccentric shaft (13) drives the movable jaw (12) to swing left and right, and then drives the movable jaw plate (16) connected with the movable jaw (12) to swing left and right;
and step 3: the movable jaw plate (16) which swings left and right squeezes and breaks soil between the fixed jaw plate (17) and the movable jaw plate (16);
and 4, step 4: the soil is discharged from the first discharge hole (20) and falls into the soil screening mechanism (3), and the soil falls onto a screen (44) of the soil screening box (34) through the discharging pipe (32) due to the gravity of the soil;
and 5: a vibrating motor (42) of the soil screening box (34) drives a screen (44) to vibrate through a vibrating rod (45);
step 6: the crushed soil meeting the requirement of the particle size falls into the aggregate box (8) through the pores on the screen (44), and the soil meeting the requirement is manually taken out from the aggregate box (8).
2. The laboratory soil crushing and screening method according to claim 1, wherein the method comprises the following steps: soil enters a gap between a shell (21) of the secondary soil crushing mechanism (2) and an extrusion cone (26) through a first discharge hole (20) of the primary soil crushing mechanism (1); a rotating shaft of the second motor (24) drives the gear box (23), and an output shaft of the gear box (23) drives the extrusion cone (26) to rotate clockwise; the extrusion cone (26) rotates to extrude soil between the extrusion cone (26) and the shell (21), and meanwhile, the crushing screwer (22) cuts and crushes the soil and drives the soil to move towards the second discharge hole (25).
3. The laboratory soil crushing and screening method according to claim 2, wherein the method comprises the following steps: the soil is discharged from the second discharge hole (25) and falls into the soil screening mechanism (3).
4. The laboratory soil crushing and screening method according to claim 1, wherein the method comprises the following steps: the soil on the screen (44) which is not qualified is poured into the feeding hole (11) again for crushing until the soil is qualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110929869.4A CN113758774A (en) | 2021-08-13 | 2021-08-13 | Laboratory soil crushing and screening method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110929869.4A CN113758774A (en) | 2021-08-13 | 2021-08-13 | Laboratory soil crushing and screening method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113758774A true CN113758774A (en) | 2021-12-07 |
Family
ID=78789270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110929869.4A Pending CN113758774A (en) | 2021-08-13 | 2021-08-13 | Laboratory soil crushing and screening method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113758774A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105082506A (en) * | 2015-08-28 | 2015-11-25 | 顺德职业技术学院 | Multi-segment coaxial and series-connected type cone-shaped extrusion device |
| CN106391184A (en) * | 2016-11-18 | 2017-02-15 | 河北建筑工程学院 | Clod crushing and screening machine for laboratory |
| CN208629739U (en) * | 2018-04-03 | 2019-03-22 | 叶锋 | A kind of plastics secondary breaker |
| WO2019062330A1 (en) * | 2017-09-28 | 2019-04-04 | 广东美的生活电器制造有限公司 | Screw, food processing cup assembly and food processor |
| CN209005858U (en) * | 2018-09-29 | 2019-06-21 | 安徽精怡科学仪器科技有限公司 | One kind can sieve soil beveller |
| CN211160153U (en) * | 2019-11-06 | 2020-08-04 | 会泽滇北工贸有限公司 | Recycling system is selected separately in building rubbish's breakage |
| CN212432712U (en) * | 2020-05-06 | 2021-01-29 | 生态环境部南京环境科学研究所 | A soil pretreatment device |
| CN112295684A (en) * | 2020-09-30 | 2021-02-02 | 邱敏 | Traditional chinese medicine raw materials smashes sieving mechanism |
| CN112934323A (en) * | 2021-01-26 | 2021-06-11 | 郑州航空工业管理学院 | Multifunctional crushing equipment with screening function for recycled coarse aggregate raw materials |
-
2021
- 2021-08-13 CN CN202110929869.4A patent/CN113758774A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105082506A (en) * | 2015-08-28 | 2015-11-25 | 顺德职业技术学院 | Multi-segment coaxial and series-connected type cone-shaped extrusion device |
| CN106391184A (en) * | 2016-11-18 | 2017-02-15 | 河北建筑工程学院 | Clod crushing and screening machine for laboratory |
| WO2019062330A1 (en) * | 2017-09-28 | 2019-04-04 | 广东美的生活电器制造有限公司 | Screw, food processing cup assembly and food processor |
| CN208629739U (en) * | 2018-04-03 | 2019-03-22 | 叶锋 | A kind of plastics secondary breaker |
| CN209005858U (en) * | 2018-09-29 | 2019-06-21 | 安徽精怡科学仪器科技有限公司 | One kind can sieve soil beveller |
| CN211160153U (en) * | 2019-11-06 | 2020-08-04 | 会泽滇北工贸有限公司 | Recycling system is selected separately in building rubbish's breakage |
| CN212432712U (en) * | 2020-05-06 | 2021-01-29 | 生态环境部南京环境科学研究所 | A soil pretreatment device |
| CN112295684A (en) * | 2020-09-30 | 2021-02-02 | 邱敏 | Traditional chinese medicine raw materials smashes sieving mechanism |
| CN112934323A (en) * | 2021-01-26 | 2021-06-11 | 郑州航空工业管理学院 | Multifunctional crushing equipment with screening function for recycled coarse aggregate raw materials |
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Application publication date: 20211207 |
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| RJ01 | Rejection of invention patent application after publication |