CN111855334A - Grinding, screening and weighing assembly for preparing soil sample - Google Patents
Grinding, screening and weighing assembly for preparing soil sample Download PDFInfo
- Publication number
- CN111855334A CN111855334A CN201910333668.0A CN201910333668A CN111855334A CN 111855334 A CN111855334 A CN 111855334A CN 201910333668 A CN201910333668 A CN 201910333668A CN 111855334 A CN111855334 A CN 111855334A
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- Prior art keywords
- grinding
- soil sample
- screen
- screening
- weighing
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- 239000002689 soil Substances 0.000 title claims abstract description 73
- 238000000227 grinding Methods 0.000 title claims abstract description 70
- 238000005303 weighing Methods 0.000 title claims abstract description 35
- 238000012216 screening Methods 0.000 title claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 18
- 239000004744 fabric Substances 0.000 abstract description 13
- 238000002360 preparation method Methods 0.000 abstract description 11
- 239000008187 granular material Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- 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
- B02C18/16—Details
- B02C18/24—Drives
-
- 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
- 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
-
- 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
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/52—Weighing apparatus combined with other objects, e.g. furniture
-
- 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
-
- 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
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Food Science & Technology (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Combined Means For Separation Of Solids (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to the technical field of soil sample preparation, in particular to an assembly for automatically preparing a soil sample. A grinding and screening weigh assembly for preparing a soil sample, comprising: the device comprises a base, a weighing platform, a receiving hopper, a vibrating platform, a screen and a soil sample particle crusher; the soil sample particle crusher, the vibration table and the weighing table are respectively arranged on the upper part, the middle part and the lower part of the base; the receiving hopper is arranged on the weighing platform; the screen cloth sets up on the shaking table, includes: the filter screen embedded in the outer frame is arranged on the outer wall of the outer frame; the screen cloth and connect the hopper coaxial arrangement, and the bottom surface of screen cloth just to connect the hopper. The invention realizes the automatic grinding, screening and high-precision weighing of soil sample particles and improves the sample preparation efficiency.
Description
Technical Field
The invention relates to the technical field of soil sample preparation, in particular to an assembly for automatically preparing a soil sample.
Background
The soil sample preparation refers to the process of uniformly mixing, drying, grinding and sieving the soil sample after the soil sample is collected from the field. As shown in fig. 1, the conventional soil sample preparation process includes: sampling, removing foreign matters such as bricks, lime concretions, rhizome animal and plant residues and the like mixed in soil, air-drying, coarse grinding, fine grinding, weighing, bottling and the like. In the traditional process, a pure manual mode is needed to grind, screen and weigh the soil sample, and the problems of large workload, long period, high requirement on personnel quality, low sample preparation efficiency and the like exist in the preparation process.
Disclosure of Invention
The purpose of the invention is: in order to improve the preparation efficiency of the soil sample, a grinding, screening and weighing assembly for preparing the soil sample is provided.
The technical scheme of the invention is as follows: a grinding and screening weigh assembly for preparing a soil sample, comprising: the device comprises a base, a weighing platform, a receiving hopper, a vibrating platform, a screen and a soil sample particle crusher;
the soil sample particle crusher, the vibration table and the weighing table are respectively arranged on the upper part, the middle part and the lower part of the base;
the receiving hopper is arranged on the weighing platform;
the screen cloth sets up on the shaking table, includes: the filter screen embedded in the outer frame is arranged on the outer wall of the outer frame; the screen cloth and connect the hopper coaxial arrangement, and the bottom surface of screen cloth just to connect the hopper.
During operation, at first utilize soil granule rubbing crusher to grind the soil sample, grind the completion back, pour the soil sample into the sieve of soil sample granule grinding machine below in, then start the shaking table, under the vibration of shaking table, the soil sample sieves to the screen cloth below connect the hopper in, the platform of weighing weighs the soil sample that gets into in connecing the hopper, if soil sample weight is not enough, then the repetition is ground, the screening link, satisfies the requirement until weighing.
In the above-mentioned scheme, it is specific, weighing platform includes: the scale comprises a balance bracket, a weighing sensor and a weighing plate; the weighing sensor is arranged between the balance bracket and the weighing plate; the balance support is fixedly connected with the base, and the weighing plate is provided with a material placing hole for placing the material receiving hopper.
In the above scheme, specifically, the vibrating table has a transverse, longitudinal and diagonal three-dimensional vibrating function, and a mode of combining diagonal vibration, transverse vibration and longitudinal vibration can be adopted when screening.
In the above-mentioned scheme, specifically, soil sample granule rubbing crusher includes: the grinding device comprises a grinding cylinder, a cutting grinding head arranged in the grinding cylinder, a motor used for driving the cutting grinding head to rotate, and a cover plate used for opening/closing the grinding cylinder. Further, the motor is arranged at the bottom of the grinding cylinder, and the grinding cylinder can be turned over up and down; when grinding is carried out, firstly, the dried soil sample is poured into a grinding cylinder, the cover plate is turned downwards to seal the grinding cylinder, and then a motor is started to grind the soil sample through a cutting grinding head; and after the grinding is finished, the cover plate is turned upwards, and the grinding cylinder is turned downwards to pour the ground soil sample out to the screen below the grinding cylinder. Furthermore, the motor is a variable frequency motor, and soil samples with different meshes can be obtained by adjusting the grinding time and the grinding speed of the motor and selecting different blades.
On the basis of the scheme, a sample splitter is further arranged on the material receiving hopper or the screen; symmetrical four-divided or even-number-divided intervals which are more than four are designed in the sample divider along the diameter direction, the centers of the grids are overlapped with the cylinder axis of the sample divider, and the bottoms of the intervals in the sample divider are sealed; when the soil samples are normally distributed and naturally fall along the central line of the sample splitter structure, half of the soil samples enter a screen or a receiving hopper through an unsealed interval, and the other half of the soil samples are uniformly intercepted in an interval with a closed bottom, so that the soil samples are uniformly separated; the properties of the two parts of powdery samples are kept as uniform and consistent as possible in principle and are representative of each other, so that the aim of sampling the soil samples in a divided manner is fulfilled.
On the basis of above-mentioned scheme, furtherly, the cross-section of filter screen is fallen for the toper design, has placed the grinding ball in the annular face of filter screen and frame, and when the screen cloth vibration, the grinding ball receives screen cloth elasticity to do the secondary vibrations, and the screen cloth is hit to the bullet when the whereabouts is kick-backed, strengthens vibrations effect, increases sample screening efficiency.
Has the advantages that: the invention realizes the automatic grinding, screening and high-precision weighing of soil sample particles and improves the sample preparation efficiency.
Drawings
FIG. 1 is a flow chart of a conventional soil sample preparation process described in the background art;
FIG. 2 is a schematic structural view of the present invention in example 1;
FIG. 3 is a schematic structural view of a screen cloth in example 2;
FIG. 4 is a cross-sectional view along AA of FIG. 3;
FIG. 5 is a schematic view showing the structure of a soil sample grain pulverizer in example 3;
FIG. 6 is a schematic view showing the structure of the sampler in example 4;
wherein: 1-base, 2-weighing table, 3-receiving hopper, 4-vibration table, 5-screen, 51-outer frame, 52-filter screen, 53-clamping and positioning structure, 54-grinding ball, 6-soil sample particle crusher, 61-grinding cylinder, 62-cutting grinding head, 63-motor, 64-cover plate and 7-sample divider.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
Example 1: referring to fig. 2, a grinding and screening weigh assembly for preparing a soil sample, comprising: the device comprises a base 1, a weighing platform 2, a receiving hopper 3, a vibrating platform 4, a screen 5 and a soil sample particle crusher 6;
the soil sample particle crusher 6, the vibration table 4 and the weighing table 2 are respectively arranged on the upper part, the middle part and the lower part of the base 1;
the receiving hopper 3 is arranged on the weighing platform 2;
the screen 5 is provided on the vibrating table 4, and includes: the filter screen 52 is embedded into the outer frame 51, and the outer wall of the outer frame 51 is provided with a clamping and positioning structure 53; the screen 5 and the receiving hopper 3 are coaxially arranged, and the bottom surface of the screen 5 is opposite to the receiving hopper 3;
In this example, the vibration table 4 has a three-dimensional vibration function of transverse, longitudinal, and diagonal directions, and a combination of diagonal vibration, transverse vibration, and longitudinal vibration may be used for the screening.
During operation, at first utilize soil granule rubbing crusher 6 to grind the soil sample, grind the completion back, pour the soil sample into in the screen cloth 5 of soil sample granule grinding machine 6 below, then start shaking table 4, under the vibration of shaking table 4, the soil sample sieves to the screen cloth below in connecing hopper 3, the platform of weighing 2 weighs the soil sample that gets into in connecing hopper 3, if soil sample weight is not enough, then the repeated grinding, the screening link, satisfy the requirement until weighing.
Example 2: referring to fig. 3 and 4, on the basis of embodiment 1 or 2, in order to enhance the vibration effect, the cross section of the filter screen 52 is inverted into a conical design, the grinding balls 54 are placed in the annular surface between the filter screen 52 and the outer frame 51, when the filter screen 5 vibrates, the grinding balls 54 are subjected to secondary vibration by the elasticity of the filter screen 5, and when the filter screen 5 falls and rebounds, the grinding balls impact the filter screen 5, so that the sample screening efficiency is increased.
Example 3: referring to fig. 5, on the basis of the embodiment 1, 2 or 3, the structure of the soil-like particle crusher 6 is specifically defined:
the soil sample particle mill 6 includes: a grinding cylinder 61, a cutting grinding head 62 mounted in the grinding cylinder 61, a motor 63 for driving the cutting grinding head 62 to rotate, and a cover plate 64 for opening/closing the grinding cylinder 61. Further, a motor 63 is installed at the bottom of the grinding cylinder 61, and the grinding cylinder 61 can be turned over up and down; when grinding is carried out, firstly, the dried soil sample is poured into the grinding cylinder 61, the cover plate 64 is turned downwards to seal the grinding cylinder 61, and then the motor 63 is started to grind the soil sample through the cutting grinding head 62; after the grinding is completed, the cover plate 64 is turned upwards, the grinding cylinder 61 is turned downwards, and the ground soil sample is poured out to the screen 5 below the grinding cylinder 61. Furthermore, the motor 63 is a variable frequency motor, has three modes of low speed, medium speed and high speed, can realize knocking, crushing and grinding of bulk and block soil samples, and can finish the preparation of soil samples with different particle sizes such as large particles, medium particles, small particles and the like in a specific time; the ultra-low speed rotation of the cutting grinding head 62 can also realize the stirring of the prepared sample, so that the prepared sample is uniformly mixed and homogenized.
Example 4: on the basis of the embodiment 1 or 2 or 3 or 4, a sample splitter 7 is further arranged on the receiving hopper 3 or the screen 5;
referring to fig. 6, the inside of the sample splitter 7 is provided with symmetric quartering or even number equal-dividing intervals larger than four divided by grids along the diameter direction, the center of the grids coincides with the cylinder axis of the sample splitter 7, and the bottom of the interval in the sample splitter 7 is sealed; in this example, the sample splitter 7 is internally divided into four sections for implementing a soil sample quartering method; when the soil samples are normally distributed and naturally fall along the structural center line of the sample splitter 7, half of the soil samples enter the screen 5 or the receiving hopper 3 through an unsealed interval, and the other half of the soil samples are uniformly intercepted in an interval with a closed bottom, so that the soil samples are uniformly separated; the properties of the two parts of powdery samples are kept as uniform and consistent as possible in principle and are representative of each other, so that the aim of sampling the soil samples in a divided manner is fulfilled.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A grinding and screening weighing assembly for preparing soil samples, comprising: the device comprises a base (1), a weighing platform (2), a receiving hopper (3), a vibrating platform (4), a screen (5) and a soil sample particle crusher (6);
the soil sample particle crusher (6), the vibration table (4) and the weighing table (2) are respectively arranged on the upper part, the middle part and the lower part of the base (1);
the receiving hopper (3) is arranged on the weighing platform (2);
the screen (5) is arranged on the vibrating table (4) and comprises: the filter screen comprises an outer frame (51) and a filter screen (52) embedded into the outer frame (51), wherein a clamping and positioning structure (53) is arranged on the outer wall of the outer frame (51); the screen (5) and the receiving hopper (3) are coaxially arranged, and the bottom surface of the screen (5) is just opposite to the receiving hopper (3).
2. A grinding and screening weighing assembly for preparing soil samples, according to claim 1, characterized in that said vibrating table (4) has a three-dimensional vibrating function in transverse, longitudinal and diagonal directions.
3. A grinding and screening weighing assembly for preparing soil samples according to claim 1 or 2, characterized in that said soil-like particle grinder (6) comprises: the grinding device comprises a grinding cylinder (61), a cutting grinding head (62) arranged in the grinding cylinder (61), a motor (63) used for driving the cutting grinding head (62) to rotate, and a cover plate (64) used for opening/closing the grinding cylinder (61).
4. A grinding and screening weigh assembly for preparing soil samples according to claim 3, wherein said motor (63) is mounted at the bottom of said grinding cylinder (61), said grinding cylinder (61) being able to rotate up and down.
5. A grinding and screening weighing assembly for preparing soil samples according to claim 3, wherein said motor (63) is a variable frequency motor having three modes of low speed, medium speed and high speed.
6. An abrasive screening weighing assembly for preparing soil samples according to claim 1 or 2, characterized in that a sample splitter (7) is provided on said receiving hopper (3) or said screen (5).
7. A grinding and screening weighing assembly for preparing soil samples, according to claim 1 or 2, characterized in that said sieve (52) is of inverted conical design in cross-section, grinding balls (54) being placed in the annular face of said sieve (52) and said outer frame (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910333668.0A CN111855334A (en) | 2019-04-24 | 2019-04-24 | Grinding, screening and weighing assembly for preparing soil sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910333668.0A CN111855334A (en) | 2019-04-24 | 2019-04-24 | Grinding, screening and weighing assembly for preparing soil sample |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111855334A true CN111855334A (en) | 2020-10-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910333668.0A Pending CN111855334A (en) | 2019-04-24 | 2019-04-24 | Grinding, screening and weighing assembly for preparing soil sample |
Country Status (1)
| Country | Link |
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| CN (1) | CN111855334A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112452699A (en) * | 2020-11-05 | 2021-03-09 | 孙鑫 | Screening plant for soil sampling |
| CN113295483A (en) * | 2021-04-19 | 2021-08-24 | 陕西华邦检测服务有限公司 | Soil coarse grinding and fine grinding instrument and method |
| CN114018668A (en) * | 2021-11-04 | 2022-02-08 | 北京兰友科技有限公司 | Full-automatic soil sample preparation system |
| CN114018669A (en) * | 2021-11-04 | 2022-02-08 | 北京兰友科技有限公司 | Full-automatic soil sample preparation method |
| CN114964975A (en) * | 2022-06-24 | 2022-08-30 | 广东省有色工业建筑质量检测站有限公司 | Intelligent automatic pretreatment system for chloride ion detection in hardened concrete |
| CN116380578A (en) * | 2023-03-10 | 2023-07-04 | 西北农林科技大学 | Automatic soil sample preparation system |
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| CN107754988A (en) * | 2017-09-30 | 2018-03-06 | 西安交通大学 | A kind of automatic circulation type soil lapping device |
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| CN109632409A (en) * | 2018-11-15 | 2019-04-16 | 无锡飞述科技有限公司 | A kind of sample preparation apparatus and preparation method for Soil K+adsorption |
| CN209802792U (en) * | 2019-04-24 | 2019-12-17 | 北京兰友科技有限公司 | Grinding, screening and weighing assembly for preparing soil sample |
| US20200116610A1 (en) * | 2017-06-14 | 2020-04-16 | China University Of Mining And Technology | Testing system and method for measuring loss of particles in water inrush process in real time |
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2019
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| CN204276099U (en) * | 2014-11-21 | 2015-04-22 | 安徽理工大学 | A kind of gradation sizing mortar |
| US20200116610A1 (en) * | 2017-06-14 | 2020-04-16 | China University Of Mining And Technology | Testing system and method for measuring loss of particles in water inrush process in real time |
| CN107790364A (en) * | 2017-09-15 | 2018-03-13 | 中检集团理化检测有限公司 | Pedotheque sample preparation Special screen |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112452699A (en) * | 2020-11-05 | 2021-03-09 | 孙鑫 | Screening plant for soil sampling |
| CN113295483A (en) * | 2021-04-19 | 2021-08-24 | 陕西华邦检测服务有限公司 | Soil coarse grinding and fine grinding instrument and method |
| CN114018668A (en) * | 2021-11-04 | 2022-02-08 | 北京兰友科技有限公司 | Full-automatic soil sample preparation system |
| CN114018669A (en) * | 2021-11-04 | 2022-02-08 | 北京兰友科技有限公司 | Full-automatic soil sample preparation method |
| CN114964975A (en) * | 2022-06-24 | 2022-08-30 | 广东省有色工业建筑质量检测站有限公司 | Intelligent automatic pretreatment system for chloride ion detection in hardened concrete |
| CN116380578A (en) * | 2023-03-10 | 2023-07-04 | 西北农林科技大学 | Automatic soil sample preparation system |
| CN116380578B (en) * | 2023-03-10 | 2024-01-30 | 西北农林科技大学 | Automatic soil sample preparation system |
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