CN111198117A - Simple double-stick cross soil grinding and sample preparation method - Google Patents
Simple double-stick cross soil grinding and sample preparation method Download PDFInfo
- Publication number
- CN111198117A CN111198117A CN202010073747.5A CN202010073747A CN111198117A CN 111198117 A CN111198117 A CN 111198117A CN 202010073747 A CN202010073747 A CN 202010073747A CN 111198117 A CN111198117 A CN 111198117A
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- Prior art keywords
- stick
- soil
- wood
- sample
- soil sample
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Links
- 239000002689 soil Substances 0.000 title claims abstract description 64
- 238000000227 grinding Methods 0.000 title claims abstract description 19
- 238000005464 sample preparation method Methods 0.000 title claims abstract description 18
- 239000002023 wood Substances 0.000 claims abstract description 45
- 238000002360 preparation method Methods 0.000 claims abstract description 9
- 230000033001 locomotion Effects 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 12
- 230000003746 surface roughness Effects 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 210000004872 soft tissue Anatomy 0.000 description 1
- 238000006467 substitution reaction 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
- 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
Abstract
The invention provides a simple double-stick cross soil grinding and sample preparation method, which comprises the following steps: firstly, two round wood bars are crossly stacked above a soil sample to be ground, then the upper wood bar is pulled to do linear reciprocating motion, the wood bars are driven to continuously roll back and forth by the friction force between the two wood bars, and the soil sample is ground until the preparation of the soil sample is finished. The sample preparation method is suitable for preparing soil samples with small single sample amount and large sample amount, has strong adaptability and operability, simple tools, convenient operation, small work loss, high speed and high efficiency, avoids an operator from touching the soil samples in the sample preparation process, reduces the risk of pollution of the soil samples, and overcomes the defect that the hand is injured by friction caused by repeated friction of a single stick.
Description
Technical Field
The invention relates to the technical field of sample preparation in scientific research, in particular to a convenient, efficient and simple method for preparing a sample by alternately grinding soil with double wood bars, which is suitable for large amount of samples and small amount of single sample.
Background
Soil property analysis is an indispensable content in the fields of agricultural production, agricultural environmental protection and the like, and soil sample preparation is a prerequisite for soil property analysis. At present, the method for preparing the soil sample mainly comprises a manual single-stick soil grinding method and an instrument soil grinding method, wherein the manual single-stick soil grinding method is only suitable for preparing the soil sample with small sample amount and small sample number, the limited palm size of a human body is limited, the single-stick soil grinding amplitude in single rotation is approximately 1 circle of a stick, the process is short and discontinuous, the force is easily unloaded by a soft palm and the rotating stick, the work doing speed is slow, the work doing speed is discontinuous, the efficiency is low, in the preparation process, the hand of an operator repeatedly rubs against the stick and directly contacts the soil sample, the defects that the soil sample is polluted with a large risk, the hand is easily rubbed and hurt by the hand and the like are overcome, the instrument soil grinding method can grind a large amount of soil samples, but the sample loss is large, and the instrument soil grinding method is not suitable for preparing the soil sample with large sample amount and small sample amount.
Therefore, in order to overcome the defects of the existing soil sample preparation method, a soil sample preparation method which is suitable for preparing a large number of samples and a small number of single samples needs to be designed.
Disclosure of Invention
In view of the above, the invention provides a simple double-stick cross-grinding soil sample preparation method which has the technical advantages of convenience, high efficiency, strong operability and practicability and is suitable for preparing soil samples with a large number of samples and a small single sample.
The invention provides a simple double-stick cross soil grinding and sample preparation method, which comprises the following steps: firstly, two round wood bars are crossly stacked above a soil sample to be ground, then the upper wood bar is pulled to do linear reciprocating motion, the lower wood bar is driven to continuously roll back and forth by utilizing the friction force between the two wood bars, and the soil sample is ground until the preparation of the soil sample is finished.
Further, the soil sample to be ground is a dry soil sample, and the particle size of the soil sample to be ground is larger than 0.1 mm.
Further, the diameter ratio of the upper wood stick to the lower wood stick is 1: 2; the surface roughness Ra of the upper wood stick is 12.5-50 μm, and the hardness coefficient is not lower than 200kg/cm2(ii) a The lower stick has a surface roughness Ra of 3.2-12.5 μm and a hardness coefficient of not less than 400kg/cm2。
Further, the upper wood stick is obliquely and upwards placed on the lower wood stick along the movement direction.
The invention has the beneficial effects that:
the sample preparation method is suitable for preparing soil samples with small single sample amount and large sample amount, has strong adaptability and operability, adopts two round wood bars as sample preparation tools, has simple tools and convenient operation, and can generate larger friction force between the two wood bars under the condition of not influencing the ground soil sample by controlling the diameter ratio of the two wood bars, the surface roughness of the two wood bars and the like. During the system appearance, stack two circular sticks alternately on treating the mill soil sample, the operator only need stimulate the stick and be linear motion, can utilize the frictional force between two sticks to drive down the stick and roll mill soil, avoided the operator to touch the soil sample at system appearance in-process, reduced the contaminated risk of soil sample, overcome the drawback that the hand is hindered to the friction that single stick needs the stick friction to exist again and again in addition. Meanwhile, the operator can adjust the grinding direction and the stress magnitude by changing the included angle between the upper wood rod and the lower wood rod and the magnitude of the pressed force, so that the soil sample in the local area is mainly ground. In addition, limited human palm size, single stick single rotation grinds native amplitude and is 1 circle on average for the stick, and two stick system appearance can promote 3 to 4 circles, in addition receive palm skin soft tissue etc. and influence, the rotational speed of the circulation of two sticks grinds native 4-5 times of single stick method, can go on repeatedly in succession, and the loss of doing work is little, fast, efficient.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a schematic view of a sample preparation method according to an embodiment;
fig. 2 is a schematic view of an initial state of pushing ground soil according to a sample preparation method provided in the first embodiment;
fig. 3 is a schematic view illustrating an end state of pushing the grinding soil according to the sample preparation method provided in the first embodiment;
FIG. 4 is a schematic view of an initial state of the sample preparation method according to the first embodiment;
FIG. 5 is a schematic view illustrating an ending state of the sample preparation method of the first embodiment in which the ground soil is pulled back;
in the figure: 1. a desktop; 2. a soil sample to be ground; 3. a wood stick is put; 4. putting a wood stick; 5. a distal end; 6. a proximal end.
Detailed Description
Example one
The simple method for preparing the sample by grinding the soil by the two wood bars in the crossing way comprises the following steps:
(1) placing the dried soil sample to be ground with the grain diameter larger than 0.1mm on a table top paved with a kraft paper cushion layer;
(2) selecting two round wood bars to be alternately stacked above the soil sample to be ground, and specifically: the lower wooden sticks are horizontally placed in front of an operator in parallel, and the upper wooden sticks are placed on the lower wooden sticks in a crossed manner; the diameter ratio of the upper wood stick to the lower wood stick is 1: 2; the surface roughness Ra of the upper wood bar is 50 mu m, and the hardness coefficient is 200kg/cm2(ii) a The lower stick had a surface roughness Ra of 12.5 μm and a hardness coefficient of 400kg/cm2；
(3) The two hands respectively grasp the two ends of the upper wood stick, repeatedly push and pull the upper wood stick to enable the upper wood stick to do linear reciprocating motion, the lower wood stick is driven to continuously roll back and forth by utilizing the friction force between the two wood sticks, and the soil sample is ground until the preparation of the soil sample is finished;
when the upper stick is pushed, the near end (close to the human body) of the upper stick is lower than the far end (far from the human body), the upper stick is kept to be placed on the lower stick upwards along the movement direction in an inclined mode so as to facilitate force transmission, then the upper stick is pushed forwards, and the lower stick is driven to roll clockwise to grind soil by using the friction force between the two sticks;
when the upper wooden stick is pulled back, the far end of the upper wooden stick is lower than the near end, the upper wooden stick is also kept to be placed on the lower wooden stick along the movement direction in an inclined and upward mode so as to facilitate force transmission, then the upper wooden stick is pulled back, and the lower wooden stick is driven to roll anticlockwise to grind soil by utilizing the friction force between the two wooden sticks; here "push forward" refers to push away from the operator and "pull back backward" refers to pull back closer to the operator.
In this embodiment, the soil sample in the local area can be mainly ground by adjusting the included angle between the two wood rods, the contact position of the two wood rods, the pushing distance of the upper wood rod, the pressing force applied to the upper wood rod, and the like.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (4)
1. A simple double-stick cross soil grinding sample preparation method is characterized by comprising the following steps: the method comprises the following steps: firstly, two round wood bars are crossly stacked above a soil sample to be ground, then the upper wood bar is pulled to do linear reciprocating motion, the wood bars are driven to continuously roll back and forth by the friction force between the two wood bars, and the soil sample is ground until the preparation of the soil sample is finished.
2. The simple double-stick cross-grinding soil sample preparation method according to claim 1, characterized in that: the soil sample to be ground is a dry soil sample, and the particle size of the soil sample to be ground is larger than 0.1 mm.
3. The simple double-stick cross-grinding soil sample preparation method according to claim 2, characterized in that: the diameter ratio of the upper wood stick to the lower wood stick is 1: 2; the surface roughness Ra of the upper wood stick is 12.5-50 μm, and the hardness coefficient is not lower than 200kg/cm2(ii) a The lower stick has a surface roughness Ra of 3.2-12.5 μm and a hardness coefficient of not less than 400kg/cm2。
4. The simple double-stick cross-grinding sample preparation method according to claim 3, characterized in that: the upper wood stick is obliquely and upwards placed on the lower wood stick along the moving direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010073747.5A CN111198117A (en) | 2020-01-22 | 2020-01-22 | Simple double-stick cross soil grinding and sample preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010073747.5A CN111198117A (en) | 2020-01-22 | 2020-01-22 | Simple double-stick cross soil grinding and sample preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111198117A true CN111198117A (en) | 2020-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010073747.5A Pending CN111198117A (en) | 2020-01-22 | 2020-01-22 | Simple double-stick cross soil grinding and sample preparation method |
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| Country | Link |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090084202A1 (en) * | 2006-01-20 | 2009-04-02 | Tomohiro Mimori | Sample Trituration Vessel, Tool and Method Using The Same |
| CN103120979A (en) * | 2012-12-28 | 2013-05-29 | 山东省农业科学院农业资源与环境研究所 | Soil sample smashing device and working method thereof |
| CN204202971U (en) * | 2014-11-07 | 2015-03-11 | 昆明理工大学 | A kind of portable stone roller soil device |
| CN208039896U (en) * | 2018-03-12 | 2018-11-02 | 江苏峰峦环境建设有限公司 | A kind of municipal works violation billboard dismounting device |
| CN108745574A (en) * | 2018-08-29 | 2018-11-06 | 中国农业科学院农田灌溉研究所 | A kind of hand-operated soil grinding device |
| CN208066492U (en) * | 2018-01-03 | 2018-11-09 | 青岛农业大学 | A kind of soil grinding device of cleanliness without any pollution |
| CN209745649U (en) * | 2019-04-09 | 2019-12-06 | 南京林业大学 | Handheld soil sample grinder |
-
2020
- 2020-01-22 CN CN202010073747.5A patent/CN111198117A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090084202A1 (en) * | 2006-01-20 | 2009-04-02 | Tomohiro Mimori | Sample Trituration Vessel, Tool and Method Using The Same |
| CN103120979A (en) * | 2012-12-28 | 2013-05-29 | 山东省农业科学院农业资源与环境研究所 | Soil sample smashing device and working method thereof |
| CN204202971U (en) * | 2014-11-07 | 2015-03-11 | 昆明理工大学 | A kind of portable stone roller soil device |
| CN208066492U (en) * | 2018-01-03 | 2018-11-09 | 青岛农业大学 | A kind of soil grinding device of cleanliness without any pollution |
| CN208039896U (en) * | 2018-03-12 | 2018-11-02 | 江苏峰峦环境建设有限公司 | A kind of municipal works violation billboard dismounting device |
| CN108745574A (en) * | 2018-08-29 | 2018-11-06 | 中国农业科学院农田灌溉研究所 | A kind of hand-operated soil grinding device |
| CN209745649U (en) * | 2019-04-09 | 2019-12-06 | 南京林业大学 | Handheld soil sample grinder |
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Application publication date: 20200526 |