Geochemical exploration soil sample preparation device and preparation method for field geological work

Abstract

The invention provides a geochemical exploration soil sample preparation device and method for field geological work.The sample preparation device comprises a movable base, a plurality of sample treatment units and a functional assembly, the sample treatment units and the functional assembly are mounted on the movable base, and the functional assembly is mounted in the middle of the movable base; the sample processing units are circumferentially arranged on the movable base and located on the outer side of the functional assembly, each sample processing unit can operate independently, and each sample processing unit comprises an upper sealed cabin, an original sample containing container used for being installed in the upper sealed cabin, a middle sealed cabin and a screen used for being installed in the middle sealed cabin; the sieved sample collecting container is mounted in the lower sealed cabin; according to the sample preparation device and the preparation method in the embodiment, multiple batches of soil samples can be prepared at the same time, the sample preparation device and the preparation method are suitable for use scenes of field geological collection, people can be prevented from making contact with dust in the screening process, and human health can be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of geological and geochemical exploration, and in particular to a geochemical exploration soil sample preparation device and method for field geological work. Background Art

[0002] Geochemical prospecting is a method of systematically measuring the geochemical properties of natural materials to discover geochemical anomalies related to mineralization or ore deposits. Its full name is geochemical prospecting, also known as geochemical prospecting. It is based on geochemistry and ore deposits, with geochemical dispersion halos (flows) as the main research object. It aims to discover ore deposits or ore bodies by investigating the distribution, dispersion and concentration of related elements in the earth's crust.

[0003] In order to reveal geological information deep underground and identify potential mineral resources, multi-target geochemical surveys often use the method of collecting soil samples for geochemical analysis. Systematically measuring the trace element content or other geochemical characteristics in the soil to find non-ferrous metals, rare dispersed elements, radioactive element deposits, oil and natural gas and other mineral resources is an important means of geological exploration.

[0004] Among them, the specific method of collecting soil samples for geochemical analysis under the existing technology is to collect soil layer B (sedimentation layer) with a depth of 0-30cm in the field work. After collecting the samples, they need to be dried in the shade for a long time until the samples are completely dry, that is, the soil is loose when pinched by hand; then the samples are screened manually, and the soil samples are screened multiple times using sieves with different aperture sizes to obtain soil samples with different particle size ranges for different analysis projects. In the process of field geological work, it is often necessary to sample multiple locations and regions in batches, and the different batches of soil samples collected need to be stored and prepared separately to ensure the purity of the soil samples. However, the existing technology lacks a device that can store and prepare multiple batches of soil samples collected in the field environment, and the soil sample preparation method under the existing technology is inefficient, and the steps for preparing multiple batches of samples are relatively cumbersome. Soil samples are easily contaminated with each other. Therefore, a fast and efficient sample preparation device and preparation method are needed to simultaneously prepare and store multiple batches of soil samples, so as to adapt to the situation of preparing multiple batches of soil samples during field geological work. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a geochemical soil sample preparation device and method for field geological work, so as to eliminate or improve one or more defects existing in the prior art.

[0006] One aspect of the present invention provides a geochemical soil sample preparation device for field geological work, the sample preparation device comprising a movable base and a sample processing unit and a functional component installed on the movable base; the functional component is installed in the middle position of the movable base, and a plurality of sample processing units are provided, which are arranged circumferentially on the movable base and located on the outside of the functional component, and each of the sample processing units can operate independently.

[0007] The sample processing unit includes: an upper sealed cabin and an original sample placement container for installation in the upper sealed cabin; a middle sealed cabin and a screen for installation in the middle sealed cabin; a lower sealed cabin and a sieved sample collection container for installation in the lower sealed cabin; wherein a heating module is provided in the upper sealed cabin for heating the original sample to a set temperature so as to dry it; a sample outlet is provided at the bottom of the original sample placement container, and a sample falling channel is provided at the bottom of the upper sealed cabin so that the original sample can enter the middle sealed cabin through the sample falling channel; the sieved sample collection container is provided below the screen for collecting sieved soil samples.

[0008] In some embodiments of the present invention, the functional component includes a first vibration component, which includes a power source and a vibration output disk, and connecting rods respectively connected to the screens of each sample processing unit, and the vibration output disk is used to transfer the vibration energy generated by the power source to each of the screens connected to the connecting rods.

[0009] In some embodiments of the present invention, the middle sealed cabin includes a second vibration component, which includes an annular structure for supporting the screen, a first magnet arranged on the screen and a second magnet arranged on the annular structure, the annular structure is fixedly arranged on the inner wall of the middle sealed cabin, and its inner diameter is smaller than the outer diameter of the screen; the second magnet is arranged on the upper surface of the annular structure, the first magnet is arranged on the lower surface of the screen, and the second magnet is an electromagnet whose polarity is the same as or opposite to that of the first magnet.

[0010] In some embodiments of the present invention, the functional component also includes a dust removal component, which includes a dust bin, a dust suction fan, a filter and an air duct, and the air duct includes a main air duct for connecting the dust bin, the dust suction fan and the filter, and an upper air duct, a middle air duct and a lower air duct for respectively connecting the main air duct with the upper sealed cabin, the middle sealed cabin and the lower sealed cabin.

[0011] In some embodiments of the present invention, the upper air duct is provided with a drying module, and the drying module includes a desiccant, and the desiccant is used to be arranged inside the upper air duct to remove moisture from the gas in the upper air duct.

[0012] In some embodiments of the present invention, an openable and closable upper cover structure is provided on the top of the upper sealed cabin and / or the original sample placement container for placing soil samples or replacing the original sample placement container.

[0013] In some embodiments of the present invention, the upper sealed cabin is provided with a temperature and humidity detection module for detecting the temperature and humidity of the soil sample inside the upper sealed cabin.

[0014] In some embodiments of the present invention, a blocking mechanism is provided inside the sample falling channel, and the blocking mechanism is configured to close the sample falling channel during the soil sample drying process and open the sample falling channel after the soil sample drying is completed.

[0015] In some embodiments of the present invention, the bottom of the original sample placement container has a conical structure, so that the bottom surface of the original sample placement container has an inclined slope.

[0016] In some embodiments of the present invention, the outer diameter of the sample outlet of the original sample placement container is smaller than or equal to the inner diameter of the sample falling channel.

[0017] In some embodiments of the present invention, the outer wall of the original sample placement container and the inner wall of the upper sealed cabin are provided with mutually cooperating snap-fit ​​structures, and the snap-fit ​​structures are configured to enable the original sample placement container to be detachably installed in a predetermined position inside the upper sealed cabin.

[0018] In some embodiments of the present invention, the central sealed cabin is provided with a side opening for installing or replacing the screen.

[0019] In some embodiments of the present invention, the screen is a multi-layer structure, and the aperture size of each layer of the screen decreases from top to bottom.

[0020] In some embodiments of the present invention, the vibration direction of the screen is configured to reciprocate in an up-and-down, left-and-right, or inclined direction.

[0021] In some embodiments of the present invention, the lower sealed cabin is provided with an openable and closable side wall door for replacing the sieved sample collection container after the sieved sample collection container collects a soil sample of a predetermined weight or volume.

[0022] In some embodiments of the present invention, a weighing module is disposed inside the lower sealed cabin for detecting the weight of the soil sample collected inside the sieved sample collection container.

[0023] In some embodiments of the present invention, an observation window is provided on the side wall of the lower sealed cabin or the side wall door, and the observation window is a transparent or translucent structure for observing the soil sample collected inside the sieved sample collection container.

[0024] In some embodiments of the present invention, the movable base of the sample preparation device is provided with a wheeled or tracked walking mechanism for driving the sample preparation device to move.

[0025] In some embodiments of the present invention, the functional component further includes a power supply component, and the power supply component includes a detachably mounted battery module and a power supply interface for charging.

[0026] In some embodiments of the present invention, the functional component further includes a storage area, and the storage area is used to place different batches of the sieves, the original sample placement containers or the sieved sample collection containers.

[0027] Another aspect of the present invention also provides a method for preparing a geochemical soil sample for field geological work, the preparation method comprising the following steps: When the original sample placement container is installed in the upper sealed cabin and there is a soil sample in the original sample placement container, the heating module is controlled to start so that the temperature of the soil sample reaches a set temperature range to dry the soil sample, and the upper air duct of the dust removal component is controlled to open to absorb moisture inside the upper sealed cabin.

[0028] When the predetermined drying time is reached and the humidity of the soil sample drops to a preset threshold, the sample falling channel is controlled to open so that the soil sample falls onto the screen of the middle sealed cabin, the vibration component is controlled to start so that the screen can sieve the falling soil sample, and the middle and lower air ducts of the dust removal component are controlled to open to absorb the dust generated by the soil sample.

[0029] When the weighing module detects that the weight of the sieved sample collection container reaches a set value, the sample falling channel is controlled to be closed, and a soil sample of a predetermined weight and prepared is obtained inside the sieved sample collection container.

[0030] According to the technical solution described in the device and method for preparing a geochemical soil sample for field geological work in the embodiment of the present invention, the beneficial effects that can be obtained include at least: The sample preparation device in the embodiment of the present invention is provided with a plurality of sample processing units, so that the sample processing units can prepare multiple batches of soil samples at the same time, which is conducive to improving the flexibility of soil sample preparation; the interior of a single sample processing unit is set as a sealed cabin structure, so that each sample processing unit is isolated from each other, which can avoid mutual contamination of soil samples between different types of batches; the interior of the sample processing unit is provided with a replaceable original sample placement container, a screen and a sieved sample collection container, and replacing and cleaning them can reduce sample residues during continuous operation, so as to avoid cross contamination of soil samples between previous and subsequent batches, which is conducive to ensuring the purity of the prepared soil sample; a single sample processing unit can be roughly divided into three layers, upper, middle and lower, and the interior of the upper sealed cabin is provided with an original sample placement container and a heating module, which can heat and dry the soil sample, which is conducive to shortening the drying time of the soil sample and improving the sample preparation efficiency; the interior of the middle sealed cabin is provided with a screen, and the soil sample is automatically sieved in a closed chamber, which can avoid contact between personnel and dust during the screening process of the soil sample, thereby ensuring the health of the personnel, and can also keep the environment clean and reduce the pollution of dust to the environment during the preparation of the soil sample.

[0031] Additional advantages, purposes, and features of the present invention will be described in part in the following description, and will become apparent to those skilled in the art after studying the following, or may be learned from the practice of the present invention. The purposes and other advantages of the present invention may be achieved and obtained by the structures specifically indicated in the specification and the accompanying drawings.

[0032] Those skilled in the art will appreciate that the objectives and advantages that can be achieved with the present invention are not limited to the above specific description, and the above and other objectives that can be achieved by the present invention will be more clearly understood from the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of this application, and do not constitute a limitation of the present invention. The components in the drawings are not drawn to scale, but are only for the purpose of illustrating the principles of the present invention. In order to facilitate the illustration and description of some parts of the present invention, the corresponding parts in the drawings may be enlarged, that is, they may become larger relative to other components in the exemplary device actually manufactured according to the present invention.

[0034] Figure 1 Schematic diagram of the overall structure of a sample preparation device in one embodiment of the present invention.

[0035] Figure 2 FIG. 4 is a diagram showing the internal structure of a sample preparation device in one embodiment of the present invention.

[0036] Figure 3 FIG. 4 is a schematic diagram of the structure of a sample processing unit in one embodiment of the present invention.

[0037] Figure 4 Schematic diagram of the structure of the second vibration component in one embodiment of the present invention.

[0038] Figure 5 Schematic diagram of a sample preparation method according to an embodiment of the present invention.

[0039] Reference numerals: 1. Sample processing unit; 11. Upper sealed cabin; 111. Heating module; 112. Temperature and humidity detection module; 113. Sample drop channel; 113-1. Blocking mechanism; 114. Upper cover structure; 115. Clamping structure; 12. Middle sealed cabin; 121. Side opening; 13. Lower sealed cabin; 131. Side door; 132. Weighing module; 133. Observation window; 2. Functional components; 21. First vibration component; 211. Power source; 212, vibration output disk; 213, connecting rod; 22, second vibration assembly; 221, ring structure; 222, first magnet; 223, second magnet; 23, dust removal assembly; 231, dust bin; 232, dust suction fan; 233, filter; 234, main airway; 235, upper airway; 235-1, drying module; 236, middle airway; 237, lower airway; 24, power supply assembly; 25, storage area; 3, base; A. Container for placing original samples; B. Sieve; C. Container for collecting sieved samples. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0041] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0042] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, elements, steps or components, but does not exclude the presence or addition of one or more other features, elements, steps or components.

[0043] It should also be noted that, unless otherwise specified, the term “connection” herein may refer not only to a direct connection but also to an indirect connection involving an intermediate.

[0044] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0045] The invention provides a geochemical soil sample preparation device and a preparation method for field geological work, aiming to solve or alleviate the problem that in the field preparation of geochemical soil samples under the prior art, the natural air drying of soil samples takes a long time and is easily affected by the weather; the manual screening of soil samples is not only inefficient, but also causes personnel to be in contact with dust for a long time, thereby damaging human health; cross contamination is likely to occur during the preparation of multiple batches of soil samples, resulting in a decrease in the purity of the soil samples; and the collected soil samples cannot be prepared quickly and conveniently in the field.

[0046] Different from the method of preparing soil samples by natural air drying and manual sieving in the prior art, the geochemical soil sample preparation device for field geological work of the present invention can realize the heating and drying and automatic sieving functions of soil samples. The collected soil samples are placed inside the sample preparation device, and the moisture inside the soil samples is quickly removed by heating. Compared with the natural air drying method, the use of the sample preparation device to heat the soil samples can shorten the time required for the drying process, which is beneficial to improving the preparation efficiency of the soil samples. For example, under the prior art, it takes at least two or three days to naturally air dry the soil samples to obtain dry soil samples, while the use of the sample preparation device for heating only takes about 12 hours, which can shorten the drying time and improve the sample preparation efficiency. The natural air drying and airing method has certain requirements for the weather. The air drying operation can only be carried out on sunny days, and the air drying process is easily affected by the ambient weather. The stability of the soil sample preparation process is relatively low. The sample preparation device dries the soil samples inside the upper sealed cabin 11. The soil samples are placed in a closed environment, which can not only reduce the impact of the external environment, but also reduce the heat loss during the drying process. The sample preparation device can also be used to automatically screen soil samples, which not only reduces the manpower loss in the sample preparation process and improves work efficiency, but also avoids long-term contact between personnel and dust, which is beneficial to ensuring the health of personnel.

[0047] On the one hand, an embodiment of the present invention provides a geochemical soil sample preparation device for field geological work, such as Figure 1As shown, it includes a movable base 3 and a sample processing unit 1 and a functional component 2 installed on the movable base 3; the functional component 2 is installed in the middle position of the movable base 3, and the sample processing unit 1 is provided with a plurality of sample processing units 1, so that the sample processing units 1 can prepare multiple batches of soil samples at the same time, for example, soil samples collected in different environments or at different times can be prepared at the same time for separate research and analysis, which is conducive to improving the flexibility of soil sample preparation, and the plurality of sample processing units 1 are arranged circumferentially on the movable base 3 and located on the outside of the functional component 2, and each of the sample processing units 1 can operate independently, by controlling one or more The multiple sample processing units 1 are controlled separately, and the soil samples can be processed as they are collected. For example, when it is necessary to collect samples from multiple locations or areas, the soil samples collected at the first collection point can be placed in the corresponding sample processing unit 1 for direct sample preparation and processing; the soil samples collected at the second collection point can be placed in another sample processing unit 1 for sample preparation and processing; independently operable sample processing units are provided, and during operation, there is no need to wait for all samples to be collected before processing and preparing the soil samples. It is possible to start preparing a batch of samples as soon as a batch of samples is collected, which is conducive to improving the flexibility in soil sample preparation.

[0048] like Figure 2 and Figure 3 As shown, the sample processing unit 1 includes: an upper sealed cabin 11 and an original sample placement container A for installation in the upper sealed cabin 11; a middle sealed cabin 12 and a screen B for installation in the middle sealed cabin 12; a lower sealed cabin 13 and a sieved sample collection container C for installation in the lower sealed cabin 13; wherein a heating module 111 is arranged in the upper sealed cabin 11, which is used to heat the original sample to a set temperature to dry it, and the use of the heating module 111 inside the upper sealed cabin 11 to dry the soil sample can shorten the drying time and reduce the influence of the external environment on the drying process, which is conducive to improving the efficiency and stability of sample preparation; the bottom of the original sample storage container has a sample outlet, and the bottom of the upper sealed cabin 11 has a sample drop channel 113, so that the soil sample can enter the middle sealed cabin 12 through the sample drop channel 113, and the screen B arranged inside it can automatically sieve the soil sample, which is conducive to saving labor costs and improving screening efficiency; the sieved sample collection container C is arranged below the screen B, and is used to collect the sieved soil sample.

[0049] The advantages of the sample preparation device of the present invention in the above-mentioned embodiment are that a plurality of sample processing units 1 are provided, so that the sample processing units 1 can prepare multiple batches of soil samples at the same time, which is conducive to improving the flexibility of soil sample preparation; a single sample processing unit 1 is set as a sealed cabin structure, so that each sample processing unit 1 is isolated from each other, which can avoid mutual contamination of soil samples between different types of batches; a replaceable original sample placement container A, a screen B and a sieved sample collection container C are provided inside the sample processing unit 1, and replacement and cleaning thereof can reduce sample residues during continuous operation to avoid cross-contamination of soil samples between previous and subsequent batches; the screen B is arranged inside the middle sealed cabin 12, so that the soil sample can be automatically sieved in a closed chamber, which can avoid contact between personnel and dust during the sieving process, so as to ensure human health and reduce the pollution of dust to the environment during the preparation of soil samples; the sample preparation device is provided with a movable base 3 for bearing and supporting the structure, so that the sample preparation device can be flexibly carried and moved when used in the field, which is conducive to improving the portability and applicability of the sample preparation device.

[0050] The sample preparation device is also provided with a vibration component for driving the screen B to vibrate so as to improve the screening efficiency and screening effect of the soil sample. Since the number of sample processing units 1 is set to be multiple, the vibration component can be set to centralized control of a single controller, that is, by setting a vibration component to control multiple sample processing units at the same time; the vibration component can also be set to distributed control of multiple controllers, that is, by setting a controller on each sample processing unit to control the vibration of each sample processing unit separately.

[0051] In Example 1, the vibration component can be set to a centralized control of a single controller that controls multiple items, which can simplify the control mechanism of the vibration component, help reduce the overall weight and volume of the sample preparation device, and facilitate the use and movement of the sample preparation device in a field environment; specifically, Figure 2 As shown, the functional component 2 includes a first vibration component 21, the first vibration component 21 includes a power source 211 and a vibration output disk 212, and a connecting rod 213 respectively connected to the screen B of each sample processing unit 1, the vibration output disk 212 is used to transfer the vibration energy generated by the power source 211 to each of the screens B connected to the connecting rod 213, the power source 211 is set in the middle position of the functional component 2, and a vibration motor or a vibration motor can be used to drive the vibration output disk 212 connected thereto to vibrate, and the vibration output disk 212 is interconnected with a plurality of connecting rods 213, and is used to drive the screen B inside each sample processing unit 1 to vibrate, so as to automatically complete the screening of the soil sample. Multiple connecting rods 213 are connected to the same vibration output disk 212, and a power source 211 is controlled to drive multiple screens B to vibrate simultaneously.

[0052] In Example 2, the vibration component can be set to a distributed control of multiple controllers, which can realize flexible control of the screen B inside each sample processing unit 1, which is beneficial to saving energy loss of the vibration component, extending the working time, and reducing the vibration energy lost in the transmission process to improve the vibration efficiency. The use of electromagnets as the driving power of the vibration component can obtain a higher vibration frequency, which is beneficial to improving the screening efficiency of soil samples. Specifically, Figure 4 As shown, the middle sealed cabin 12 includes a second vibration component 22, which includes an annular structure 221 for carrying the screen B, a first magnet 222 arranged on the screen B, and a second magnet 223 arranged on the annular structure 221. The annular structure 221 is fixedly arranged on the inner wall of the middle sealed cabin 12, and its inner diameter is smaller than the outer diameter of the screen B; the second magnet 223 is arranged on the upper surface of the annular structure 221, and the first magnet 222 is arranged on the lower surface of the screen B. The second magnet 223 is an electromagnet whose polarity is the same or opposite to that of the first magnet 222. When the screen B sieves the soil sample, the electromagnet is connected to the AC power supply or the pulse power supply so that the magnetic pole direction or magnetic force of the second magnet 223 changes continuously. The two magnets repel each other when the magnetism is the same, and attract each other when the magnetism is opposite, thereby causing the screen B to vibrate inside the annular structure 221.

[0053] In some embodiments, Figure 2As shown, the functional component 2 also includes a dust removal component 23, and the dust removal component 23 includes a dust bin 231, a dust suction fan 232, a filter 233 and an air duct, and the air duct includes a main air duct 234 for connecting the dust bin 231, the dust suction fan 232 and the filter 233, and an upper air duct 235, a middle air duct 236 and a lower air duct 237 for connecting the main air duct 234 with the upper sealed cabin 11, the middle sealed cabin 12 and the lower sealed cabin 13 respectively. The gas inlet of the upper air duct 235 is arranged at the side wall of the upper sealed cabin 11, and the dust suction fan 232 of the main air duct 234 generates negative pressure, which can suck the dust inside the upper sealed cabin 11 into the dust bin 231, which is beneficial to reducing the soil sample remaining in the upper sealed cabin 11 and the original sample placement container A to avoid cross contamination; the gas inlet of the middle air duct 236 is arranged at the side wall of the middle sealed cabin 12, which is used to absorb the dust generated by the sieve B in the middle sealed cabin 12 during the soil sample screening process into the dust bin 231, which is beneficial to reducing the soil sample remaining in the middle sealed cabin 12 and the sieve B. Furthermore, since the area around the sieve is the main dust generation site during the soil sample screening process, Therefore, the middle sealed cabin 12 can be provided with a plurality of middle-layer air duct 236 entrances at positions corresponding to the upper or lower part of the screen B to improve the dust removal effect; the gas inlet of the lower-layer air duct 237 is provided at the side wall position of the lower sealed cabin 13, which is used to absorb the dust generated when the soil sample falls into the interior of the sieved sample collection container C, which is beneficial to reduce the residual soil sample in the lower sealed cabin 13; by providing a dust removal component 23 to absorb the dust generated inside each sealed cabin, the residual soil sample in the sample processing unit 1 can be reduced, and when preparing the next batch of soil samples, cross-contamination by the residual soil samples of the previous batch can be avoided, which is beneficial to improve the cleanliness of the prepared soil samples to ensure the accuracy and reliability of the sample analysis results. The filter 233 provided in the dust removal component 23 can limit the absorbed dust to the inside of the dust bin 231. The dust removal component 23 collects the dust generated by the soil sample into the internal dust bin 231 through the interconnected air ducts, which can not only prevent the dust from diffusing into the air, which is beneficial to improving the cleanliness of the environment, but also avoid direct contact between personnel and dust, which is beneficial to ensuring the health of personnel during the sample preparation process.

[0054] Further, the upper air duct 235 is provided with a drying module 235-1, and the drying module 235-1 includes a desiccant, which is used to be arranged inside the upper air duct 235 to remove moisture from the gas in the upper air duct 235. The desiccant can be arranged as a filter or a filter layer, etc., to increase the contact area with the gas inside the upper air duct 235, which is conducive to improving the drying effect of the drying module 235-1. The moisture in the soil sample inside the upper sealed cabin 11 will be converted into gaseous state and separated from the sample during the drying process. During the dust removal process, it is absorbed by the drying module 235-1 of the upper air duct 235, which can effectively reduce the humidity inside the upper sealed cabin 11, which is conducive to improving the drying efficiency, and can also prevent the internal dust from contacting with gaseous water vapor and adhering to the air duct or the dust bin 231. The setting of the drying module 235-1 is conducive to ensuring the cleanliness of the air duct and the dust bin 231, and avoiding the occurrence of air duct blockage.

[0055] In some embodiments, Figure 2 As shown, the top of the upper sealed cabin 11 and / or the original sample placement container A is provided with an openable and closable upper cover structure 114 for placing soil samples or replacing the original sample placement container A. Since the original sample placement container A in the above embodiment can have a variety of structural forms, the loading method of the sample processing unit 1 can be a method of placing the soil sample first and then installing the original sample placement container A; the loading method can also be a method of installing the original sample placement container A first and then placing the soil sample.

[0056] In Example 3, the soil sample is placed first and then the original sample placement container A is installed, which can reduce the loading time of the soil sample and prevent the dust generated during the loading process from spreading to the surrounding environment and coming into contact with people, which is conducive to ensuring the neatness and speed of the loading process; specifically, an openable and closable upper cover structure 114 is provided on the top of the upper sealed cabin 11, and the soil sample needs to be placed in the original sample placement container A in advance. When loading, the upper cover structure 114 is opened, and the original sample placement container A is installed in the upper sealed cabin 11. After completion, the upper cover structure 114 is closed, and the loading is completed.

[0057] In Example 4, the original sample placement container A is installed first and then the soil sample is placed. There is no need to operate the soil sample in advance, and the number of soil samples can be flexibly increased. The loading is flexible and easy to operate, and can adapt to a variety of usage scenarios. Specifically, the top of the upper sealed cabin 11 and the original sample placement container A are both provided with an openable and closable upper cover structure 114. The original sample placement container A can be pre-installed inside the upper sealed cabin 11. When loading, the upper cover structure 114 of the original sample placement container A is opened, and the collected soil sample is placed inside the original sample placement container A. The original sample placement container A and the upper cover structure 114 of the upper sealed cabin 11 are closed in turn, and the loading is completed.

[0058] Further, it can be understood that the upper sealed cabin 11 can also be provided with a first detection module and a second detection module. The first detection module can be provided on the upper sealed cabin 11 to detect whether the original sample placement container A inside it is installed in place, and the second detection module can be provided on the original sample placement container A to detect whether there is a soil sample inside it. After the first detection module and the second detection module detect that they are in place, the soil sample drying is started automatically by a set start button. Among them, the first detection module and the second detection module can use infrared sensors or pressure touch sensors to realize the automatic sensing function.

[0059] In some embodiments, the upper sealed cabin 11 is provided with a temperature and humidity detection module 112 for detecting the temperature and humidity of the soil sample inside the upper sealed cabin 11. The temperature and humidity detection module 112 cooperates with the heating module 111, that is, when the temperature is higher than the set temperature, the heating module stops heating, and when the temperature is lower than the set temperature range, the heating module starts heating, so that the internal temperature of the upper sealed cabin 11 is maintained in the temperature range of 40°C to 50°C. The drying temperature is set at 40°C to 50°C, which can not only promote the separation of water vapor in the soil sample, but also will not directly destroy the organic components in the soil sample and cause a large amount of volatilization of elements in the soil sample, which is conducive to improving the drying efficiency of the soil sample. It is understandable that in actual use, different soil samples and organic components may have different tolerance to temperature, so the specific drying temperature should be flexibly adjusted according to the specific sample characteristics and analysis requirements to avoid unnecessary effects on the soil sample. The temperature and humidity detection module can also detect the humidity changes of the soil sample during the drying process. The upper sealed cabin can also be provided with a timer module to monitor the heating time of the upper sealed cabin 11. For example, when the humidity detected by the temperature and humidity sensor drops to a preset threshold and the drying time reaches the set time, it indicates that the soil sample is dried and the heating module automatically stops working.

[0060] In some embodiments, a blocking mechanism 113-1 is provided inside the sample drop channel 113, and the blocking mechanism 113-1 is configured to close the sample drop channel 113 during the drying process of the soil sample, and to open the sample drop channel 113 after the drying of the soil sample is completed. The blocking mechanism 113-1 can be set as a flap structure, the drop channel is closed when the flap is in a horizontal state, and the sample drop channel 113 is opened when the flap is rotated to a vertical or inclined state, and the opening size of the drop channel is adjusted by controlling the rotation angle of the flap, including but not limited to this, and the above-mentioned blocking mechanism 113-1 can also be set as other structures that can be opened and closed, such as a horizontal rotating plate with a rotating shaft, a horizontal plug plate, etc. It can be understood that the opening and closing state of the sample drop channel 113 is interrelated with the drying condition of the soil sample, that is, the sample drop channel 113 can be opened only after the drying of the soil sample is completed, and the sample drop channel 113 needs to be kept closed before the soil sample is dried to prevent the undried soil sample from entering the middle sealed cabin 12.

[0061] In some embodiments, Figure 3 As shown, the bottom of the original sample placement container A has a conical structure, so that the bottom surface of the original sample placement container A has an inclined slope. The original sample placement container A has an inclined bottom surface structure, which can prevent the soil sample at the bottom from remaining inside the container when it falls, which is conducive to reducing the cross contamination of the soil sample, and the conical structure also plays a guiding role, which can guide the soil sample to quickly flow out from the sample outlet. Further, the outer diameter of the sample outlet of the original sample placement container A is less than or equal to the inner diameter of the sample drop channel 113, and the position of the sample outlet corresponds to the entrance position of the sample drop channel 113, so that the soil sample inside the original sample placement container A can completely enter the sample drop channel 113, including but not limited to this, a conical structure can also be set on the top of the original sample placement container A, and the inclined inner wall of the conical structure can guide the soil sample to quickly enter the interior of the original sample placement container A, and reduce the scattered soil sample through the guiding effect of the slope.

[0062] In some embodiments, Figure 3 As shown, the outer wall of the original sample container A and the inner wall of the upper sealed cabin 11 are both provided with mutually matching clamping structures 115, and the clamping structures 115 are configured to enable the original sample container A to be detachably installed at a predetermined position inside the upper sealed cabin 11, as shown in FIG. Figure 3As shown, the upper clamping block on the original sample placement container A protrudes from its outer wall surface, and the outer diameter of the upper clamping block is less than or equal to the inner diameter of the upper sealed cabin 11, and the lower clamping block on the inner wall of the upper sealed cabin 11 protrudes from its inner wall surface, and the inner diameter of the lower clamping block is greater than or equal to the outer diameter of the original sample placement container A. When the original sample placement container A is installed in the upper sealed cabin 11, the upper and lower surfaces of the upper clamping block and the lower clamping block contact each other to define the longitudinal position of the original sample placement container A; the side surface of the upper clamping block contacts each other with the inner wall of the upper sealed cabin 11, or the side surface of the lower clamping block contacts each other with the outer wall of the original sample placement container A to define the lateral position of the original sample placement container A, including but not limited to this, the above-mentioned clamping structure 115 can also be set as other structures that can fix the installation position of the original sample placement container A; for example, the clamping structure 115 can also be set to respectively set mutually matching threaded structures on the outer wall of the sample outlet and the inner wall of the sample falling channel 113 to achieve a detachable connection between the original sample placement container A and the upper sealed cabin 11.

[0063] In some embodiments, Figure 4 As shown, the middle sealed cabin 12 is provided with a side opening 121, and the side opening 121 may be provided with a pulling mechanism that can slide forward and backward to open and close the side opening 121; the side opening 121 may also be provided with a door structure that can slide up and down to open or close the side opening 121; the side opening 121 is used to install or replace the screen B, and the needs of different analysis projects can be met by replacing screens of different meshes. For example, screens with less than 20 meshes are generally used for preliminary screening of soil samples to remove larger particles, and can be used to prepare and analyze coal samples or determine the maximum particle size of coal; screens with 20 meshes to 60 meshes can be used to further subdivide soil particles and remove medium-sized particles, which are used to help determine the content of coarse sand, fine sand, silt and other particles in the soil; screens with 60 meshes to 80 meshes can be used to prepare soil samples for specific chemical analysis. The screen can remove tiny particles and impurities to ensure the purity of the soil sample, thereby meeting the needs of analysis projects such as organic, pesticide, total nitrogen content in soil, and total content of soil elements. In addition, before preparing different batches of soil samples, the unused cleaned sieve B can be replaced through the side opening 121, which can prevent cross contamination of different batches of soil samples and help improve the purity of the soil samples.

[0064] In some embodiments, the sieve B is a multi-layer structure, and the aperture size of each layer of sieve B decreases from top to bottom. The multi-layer sieve B can realize the step-by-step screening of soil samples, thereby effectively separating particles of different particle sizes, which is beneficial to improving the screening efficiency of soil samples and making sample screening fast and convenient; the multi-layer sieve B can be used for a variety of different types of materials and screening needs, and the pore size range of the sieve B is wide, which can meet the screening tasks of various particle size requirements; the use of multi-layer sieve B can not only improve the screening efficiency but also reduce production costs. The multi-layer sieve B has a long service life, good wear resistance, and large carrying capacity, which reduces the frequency of replacing the sieve B and the maintenance cost. At the same time, due to the high screening efficiency, the number of repeated screening is reduced, further reducing energy consumption and labor costs.

[0065] Furthermore, the vibration direction of the screen B is configured to vibrate reciprocatingly in an up-down, left-right or inclined direction. For the first vibration component 21, the vibration direction of the screen B is adjusted by directly changing the vibration direction of the power source 211, or by setting a steering mechanism on the vibration output disk 212 to change the vibration direction; for the second vibration component 22, the magnetic field direction of the second magnet 223 is changed, so that the magnetic force on the first magnet 222 changes, so as to adjust the vibration direction of the screen B. Adjusting the sieve B to vibrate in different directions can effectively improve the screening efficiency of the soil sample. For example, the horizontal vibration of the sieve B helps the soil sample to move and disperse laterally on the surface of the sieve B, which helps the sample to be more evenly distributed on the sieve B, thereby improving the uniformity and efficiency of the screening; the vertical vibration of the sieve B can generate a greater impact force, causing the soil sample to jump up and down on the sieve B, which helps the soil sample to pass through the sieve B faster and helps to improve the screening efficiency. In addition, the vertical vibration of the sieve B can further promote the relative movement between the soil samples, increase the contact opportunities between the samples and the sieve B, and help to improve the thoroughness and screening effect of the sample screening.

[0066] In some embodiments, Figure 3 As shown, the lower sealed cabin 13 is provided with a side door 131 that can be opened and closed. The opening and closing mode of the side door 131 can be set to a sliding opening and closing mode through a sliding mechanism, or set to a rotating opening and closing mode through a rotating shaft mechanism. After the sieved sample collection container C collects a soil sample of a predetermined weight or volume, the side door 131 is opened to replace the sieved sample collection container C. The sieved sample storage container C can be easily taken out and placed, and the sieved sample storage container can be prevented from spreading the dust inside the lower sealed cabin 13 to the surrounding air, thereby affecting environmental hygiene and personnel health.

[0067] In some embodiments, a weighing module 132 is provided inside the lower sealed cabin 13 for detecting the weight of the soil sample collected inside the sieved sample collection container C. When a soil sample of a predetermined weight needs to be prepared, the weighing module 132 cooperates with the blocking mechanism 113-1 in the sample falling channel 113. That is, when the weighing module 132 detects that the weight of the sample collected inside the sieved sample collection container C reaches a preset value, the blocking mechanism 113-1 closes the soil sample falling channel to stop the soil sample from falling. Then, the sieved sample collection container C inside the lower sealed cabin 13 is taken out, so that a standard soil sample of a preset weight that can be used for experimental analysis can be directly obtained, and no secondary weighing is required before the experimental analysis, which is convenient for use.

[0068] Furthermore, an observation window 133 is provided on the side wall of the lower sealed cabin 13 or the side wall door 131. The observation window 133 is a transparent or translucent structure. For example, the observation window 133 can be made of glass or a plastic material with a certain light transmittance. The observation window 133 can be used to observe the situation of collecting soil samples inside the sieved sample collection container C. During operation, the storage situation inside the sieved sample collection container C can be directly observed through the observation window 133, and the working situation inside the sample processing unit 1 can also be observed and monitored.

[0069] In some embodiments, the movable base 3 of the sample preparation device is provided with a wheeled or tracked walking mechanism for driving the sample preparation device to move, so that the sample preparation device can also be used in the field and other environments, which is conducive to improving the applicability and flexibility of the sample preparation device.

[0070] In some embodiments, the functional component 2 further includes a power supply component 24, which includes a detachably mounted battery module and a power supply interface for charging. The power supply component 24 is used to provide power for the sample preparation device to operate in an outdoor environment.

[0071] In some embodiments, the functional component 2 also includes a storage area 25, which is used to place different batches of the sieve B, the original sample placement container A or the sieved sample collection container C. The provision of the storage area 25 is beneficial to improving the portability of the sample preparation device when used outdoors.

[0072] In the above embodiment, the sample preparation device has a beneficial effect on preventing mutual contamination between soil samples located in adjacent sample processing units during preparation or processing. The sample processing units set up in the sample preparation device are isolated from each other, and the soil samples inside different sample processing units are blocked to reduce mutual contamination between soil samples of different batches.

[0073] The sample preparation device is also beneficial for preventing cross contamination between two batches of soil samples prepared successively within the same sample processing unit. The sample preparation device is also provided with a replaceable original sample placement container A, a screen B and a sieved sample collection container C. After the preparation of a batch of soil samples is completed, the used containers and screens are replaced and cleaned to prevent soil samples from remaining in the containers or screens, which is beneficial to reducing the probability of cross contamination between the two batches of soil samples prepared successively. The sample preparation device is provided with a dust removal component to absorb the dust generated inside each sealed cabin, which can effectively reduce the soil samples remaining inside the sample preparation device, which is beneficial to reducing the cross contamination of soil samples.

[0074] On the other hand, the present invention also provides a method for preparing a geochemical soil sample for field geological work, the preparation method being based on the sample preparation device in any of the above embodiments, comprising the following steps: When the original sample placement container A is installed in the upper sealed cabin 11 and there is a soil sample in the original sample placement container A, the heating module 111 is controlled to start so that the temperature of the soil sample reaches a set temperature range to dry the soil sample, which is beneficial to shorten the drying time of the soil sample by promoting the separation of water vapor in the soil sample; the upper air duct 235 of the dust removal component 23 is controlled to open to absorb moisture in the upper sealed cabin 11, which is beneficial to reduce the humidity in the upper sealed cabin 11 and improve the drying efficiency.

[0075] When the predetermined drying time is reached and the humidity of the soil sample drops to a preset threshold, the sample falling channel 113 is controlled to open so that the soil sample falls onto the screen B of the middle sealed cabin 12, the vibration component is controlled to start so that the screen B can sieve the falling soil sample, and the middle air channel 236 and the lower air channel 237 of the dust removal component are controlled to open to absorb dust generated by the soil sample; When the weighing module 132 detects that the weight of the sieved sample collection container C reaches a set value, the sample falling channel 113 is controlled to be closed, and a soil sample of a predetermined weight and prepared is obtained inside the sieved sample collection container C.

[0076] The sample preparation method in the above embodiment can effectively reduce the time required for dehydration of soil samples by heating and absorbing moisture compared to the natural air drying method, which is conducive to the rapid completion of soil sample processing and preparation; by absorbing the generated dust while automatically screening the sample, compared to the manual screening method, it can reduce the workload of the human body and avoid the health effects of human body contact with dust; by automatically detecting the weight of the sieved sample collection container C, a soil sample of a predetermined weight can be directly obtained, avoiding contamination of the soil sample when weighing it separately.

[0077] In some embodiments, the opening and closing state of the sample dropping channel 113 can be set to an automatic adjustment mode, that is, it remains in a closed state during the process of drying the soil sample in the upper sealed cabin 11, and becomes openable after the soil sample is dried; the sample dropping channel automatically becomes closed after the weight of the weighing module reaches a preset value.

[0078] According to the technical solutions described in the device and method for preparing geochemical soil samples for field geological work in the embodiments of the present invention, the beneficial effects that can be achieved include at least: (1) The sample preparation device in the embodiment of the present invention is provided with a plurality of independently operable sample processing units, which can not only improve the preparation efficiency of soil samples, but also prevent cross-contamination of soil samples from different batches during the preparation process, thereby facilitating the quality assurance of the prepared soil samples.

[0079] (2) The sample preparation device in the embodiment of the present invention is provided with a plurality of sample processing units, so that the sample processing units can prepare multiple batches of soil samples at the same time, which is conducive to improving the flexibility of soil sample preparation.

[0080] (3) The individual sample processing units of the sample preparation device in the embodiment of the present invention are configured as sealed cabin structures, so that the sample processing units are isolated from each other, thereby preventing soil samples in different sample processing units from being contaminated with each other.

[0081] (4) The sample processing unit of the sample preparation device in the embodiment of the present invention is internally provided with a replaceable original sample placement container, a sieve and a sieved sample collection container. Replacing and cleaning them can reduce sample residues during continuous operation, thereby avoiding cross-contamination of soil samples between previous and subsequent batches.

[0082] (5) The sample preparation device in the embodiment of the present invention uses a heating module inside the upper sealed cabin to dry the soil sample, which can shorten the drying time and reduce the impact of the external environment on the drying process, which is beneficial to improving the efficiency and stability of sample preparation.

[0083] (6) A screen is provided inside the sealed cabin in the middle of the sample preparation device in the embodiment of the present invention, and the soil sample is automatically screened in the sealed chamber, which can avoid contact between personnel and dust during the screening process of the soil sample, thereby ensuring the health of personnel and reducing the pollution of the environment by dust during the preparation of the soil sample.

[0084] (7) The sample preparation device in the embodiment of the present invention is provided with a vibration component to improve the screening efficiency and screening effect of the soil sample.

[0085] (8) The sample preparation device in the embodiment of the present invention is provided with a dust removal component, which can reduce the residual soil samples inside the sample processing unit, avoid contamination by the residual soil samples of the previous batch when preparing the next batch of soil samples, and is conducive to improving the cleanliness of the prepared soil samples to ensure the accuracy and reliability of the sample analysis results.

[0086] (9) The sample preparation method in the embodiment of the present invention can realize automatic drying and screening of soil samples, which is helpful to reduce the manpower loss in sample preparation and thus improve the sample preparation efficiency.

[0087] It should be understood by those skilled in the art that the exemplary components, systems and methods described in conjunction with the embodiments of the present invention can be implemented in hardware, software or a combination of the two. Whether it is performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present invention are programs or code segments used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link via a data signal carried in a carrier.

[0088] It should be clear that the present invention is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present invention is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present invention.

[0089] In the present invention, features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, and / or combined with features of other embodiments or replace features of other embodiments.

[0090] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the embodiments of the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A geochemical soil sample preparation device for field geological work, characterized in that: The sample preparation device comprises a movable base (3), a sample processing unit (1) and a functional component (2) mounted on the movable base (3); the functional component (2) is mounted in the middle of the movable base (3); a plurality of sample processing units (1) are arranged circumferentially on the movable base (3) and located outside the functional component (2); and each of the sample processing units (1) can operate independently; The sample processing unit (1) comprises: An upper sealed cabin (11) and an original sample placement container (A) for installation in the upper sealed cabin (11); A middle sealed cabin (12) and a screen (B) for installation in the middle sealed cabin (12); A lower sealed cabin (13) and a sieved sample collection container (C) for installation in the lower sealed cabin (13); The upper sealed cabin (11) is provided with a heating module (111) for heating the original sample to a set temperature so as to dry it; the bottom of the original sample placement container (A) is provided with a sample outlet, and the bottom of the upper sealed cabin (11) is provided with a sample drop channel (113), so that the original sample can enter the middle sealed cabin (12) through the sample drop channel (113); The sieved sample collection container (C) is arranged below the sieve (B) and is used to collect sieved soil samples.

2. The geochemical soil sample preparation device for field geological work according to claim 1, characterized in that: The functional component (2) comprises a first vibration component (21), the first vibration component (21) comprises a power source (211) and a vibration output disk (212), and connecting rods (213) respectively connected to the screens (B) of each of the sample processing units (1), the vibration output disk (212) being used to transmit the vibration energy generated by the power source (211) to each of the screens (B) connected to the connecting rods (213); or, The middle sealed cabin (12) comprises a second vibration component (22), the second vibration component (22) comprising an annular structure (221) for carrying the screen (B), a first magnet (222) arranged on the screen (B), and a second magnet (223) arranged on the annular structure (221), the annular structure (221) being fixedly arranged on the inner wall of the middle sealed cabin (12), and having an inner diameter smaller than an outer diameter of the screen (B); The second magnet (223) is arranged on the upper surface of the annular structure (221), the first magnet (222) is arranged on the lower surface of the screen (B), and the second magnet (223) is an electromagnet whose polarity is the same as or opposite to that of the first magnet (222).

3. The geochemical soil sample preparation device for field geological work according to claim 1, characterized in that: The functional component (2) further comprises a dust removal component (23), the dust removal component (23) comprising a dust bin (231), a dust suction fan (232), a filter (233) and an air duct, the air duct comprising a main air duct (234) for connecting the dust bin (231), the dust suction fan (232) and the filter (233), and an upper air duct (235), a middle air duct (236) and a lower air duct (237) for respectively connecting the main air duct (234) to the upper sealed cabin (11), the middle sealed cabin (12) and the lower sealed cabin (13).

4. The geochemical exploration soil sample preparation device for field geological work according to claim 3, characterized in that: The upper air duct (235) is provided with a drying module (235-1), the drying module (235-1) comprising a desiccant, the desiccant being arranged inside the upper air duct (235) to remove moisture from the gas in the upper air duct (235).

5. The geochemical exploration soil sample preparation device for field geological work according to claim 1, characterized in that: The top of the upper sealed cabin (11) and / or the original sample placement container (A) is provided with an openable and closable upper cover structure (114) for placing soil samples or replacing the original sample placement container (A); or, The upper sealed cabin (11) is provided with a temperature and humidity detection module (112) for detecting the temperature and humidity of the soil sample inside the upper sealed cabin (11); or, A blocking mechanism (113-1) is provided inside the sample falling channel (113), and the blocking mechanism (113-1) is configured to close the sample falling channel (113) during the soil sample drying process and to open the sample falling channel (113) after the soil sample drying is completed.

6. The geochemical exploration soil sample preparation device for field geological work according to claim 5, characterized in that: The bottom of the original sample placement container (A) has a conical structure, so that the bottom surface of the original sample placement container (A) has an inclined slope; or, The outer diameter of the sample outlet of the original sample placement container (A) is smaller than or equal to the inner diameter of the sample drop channel (113); or, The outer wall of the original sample placement container (A) and the inner wall of the upper sealed cabin (11) are both provided with mutually matching clamping structures (115), and the clamping structures (115) are configured to enable the original sample placement container (A) to be detachably mounted at a predetermined position inside the upper sealed cabin (11).

7. The geochemical exploration soil sample preparation device for field geological work according to claim 1, characterized in that: The middle sealed cabin (12) is provided with a side opening (121) for installing or replacing the screen (B); The sieve (B) is a multi-layer structure, and the aperture size of each layer of the sieve (B) decreases from top to bottom; The vibration direction of the screen (B) is configured to reciprocate in an up-down, left-right or inclined direction.

8. The geochemical exploration soil sample preparation device for field geological work according to claim 1, characterized in that: The lower sealed cabin (13) is provided with an openable and closable side wall door (131) for replacing the sieved sample collection container (C) after the sieved sample collection container (C) has collected a soil sample of a predetermined weight or volume; or, A weighing module (132) is disposed inside the lower sealed cabin (13) for detecting the weight of the soil sample collected inside the sieved sample collection container (C); or, An observation window (133) is provided on the side wall of the lower sealed cabin (13) or the side wall door (131); the observation window (133) is a transparent or semi-transparent structure and is used to observe the soil sample collected inside the sieved sample collection container (C).

9. The geochemical exploration soil sample preparation device for field geological work according to claim 1, characterized in that: The movable base (3) of the sample preparation device is provided with a wheeled or tracked walking mechanism for driving the sample preparation device to move; The functional component (2) further comprises a power supply component (24), wherein the power supply component (24) comprises a detachably mounted battery module and a power supply interface for charging; The functional component (2) further comprises a storage area (25), wherein the storage area (25) is used to store different batches of the sieves (B), the original sample placement container (A) or the sieved sample collection container (C).

10. A method for preparing geochemical soil samples for field geological work, the method being implemented based on the sample preparation device according to any one of claims 1 to 9, characterized in that: The preparation method comprises the following steps: When the original sample placement container (A) is installed inside the upper sealed cabin (11) and a soil sample is inside the original sample placement container (A), the heating module (111) is controlled to start so that the temperature of the soil sample reaches a set temperature range to dry the soil sample, and the upper air duct (235) of the dust removal component (23) is controlled to open so as to absorb moisture inside the upper sealed cabin (11); When a predetermined drying time is reached and the humidity of the soil sample drops to a preset threshold, the sample falling channel (113) is controlled to open so that the soil sample falls onto the screen (B) of the middle sealed cabin (12), the vibration component is controlled to start so that the screen (B) can sieve the falling soil sample, and the middle air duct (236) and the lower air duct (237) of the dust removal component are controlled to open so as to absorb dust generated by the soil sample; When the weighing module (132) detects that the weight of the sieved sample collection container (C) reaches a set value, the sample falling channel (113) is controlled to be closed, and a soil sample of a predetermined weight and prepared is obtained inside the sieved sample collection container (C).

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