Field screening device for soil micro-fine particle samples

Abstract

The invention discloses a soil micro-fine particle sample field screening device, and belongs to the technical field of soil sample analysis, the soil micro-fine particle sample field screening device comprises a screening box, the top surface of the screening box is provided with a feeding port, the feeding port is provided with a feeding mechanism, the screening box is internally provided with a multi-stage screening mechanism, the multi-stage screening mechanism is communicated with a plurality of collecting boxes, and the collecting boxes are located on the outer side of the screening box; the side, away from the collecting box, of the screening box is fixedly connected with a driving mechanism, the driving mechanism stretches into the screening box and is in transmission connection with the multi-stage screening mechanism, and a cleaning mechanism is arranged in the screening box. And a plurality of stages of screening mechanisms are arranged inside, and each stage of screening plate is communicated with an external collecting box, so that particles with different particle sizes can be respectively collected. The driving mechanism is located on one side of the screening box and connected with the screening plate through a mechanical transmission system, and power support is provided for the screening process. The feeding mechanism can accurately control the sample amount input every time, and the consistency and accuracy of screening results are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of soil sample analysis, and in particular relates to a field screening device for soil fine particle samples. Background Art

[0002] As people pay more and more attention to the environment, they also pay more attention to soil environment. The quality of soil affects the growth of crops or other plants and animals. Therefore, soil testing is also an important part of environmental testing. When testing the soil, it is necessary to sample the soil. Sampling usually uses tools to collect the soil. Existing tools and equipment can only sample conventional soil, such as black soil, loess, etc. It is difficult to test sandy soil mixed with stones. The stones contained in it will affect the test results. The stones can only be removed manually, and it is difficult to obtain sandy soil samples. The current method is to manually separate the stones with a sieve or rake in advance before sampling, which is time-consuming and labor-intensive. Summary of the invention

[0003] The purpose of the present invention is to provide a field screening device for soil fine particle samples to solve the problems existing in the above-mentioned prior art.

[0004] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a field screening device for soil fine particle samples, comprising a screening box, a feed port is provided on the top surface of the screening box, a feed mechanism is provided on the feed port, a multi-stage screening mechanism is provided in the screening box, the multi-stage screening mechanism is connected to multiple collecting boxes, the collecting boxes are located on the outside of the screening box, a driving mechanism is fixedly connected to the side of the screening box away from the collecting box, the driving mechanism extends into the screening box and is transmission-connected to the multi-stage screening mechanism, and a cleaning mechanism is provided in the screening box.

[0005] Preferably, the multi-stage screening mechanism includes a first connecting plate symmetrically fixed in the screening box, the first connecting plate is located at one end close to the collecting box, a plurality of screening plates are rotatably connected at equal intervals between two of the first connecting plates, the screening plates are connected to the collecting box located at the same horizontal position therewith, and one end of the screening plate away from the first connecting plate is transmission connected to the driving mechanism.

[0006] Preferably, a second connecting plate is fixedly connected to one side of the screen plate close to the driving mechanism, a first groove is provided in the second connecting plate, a first connecting shaft is rotatably connected in the first groove, a first connecting rod is fixedly connected between two adjacent first connecting shafts, and the first connecting rod is transmission-connected to the driving mechanism.

[0007] Preferably, a collecting port is provided on one side of the screening box close to the collecting box, and a collecting plate is fixedly connected to the bottom of the collecting port, which is located below the screening plate adjacent thereto.

[0008] Preferably, the driving mechanism includes a driving box fixedly connected to the outside of the screening box, a first motor fixedly connected in the driving box, one end of a first lead screw fixedly connected to the output shaft of the first motor, the other end of the first lead screw rotatably connected to the top surface inside the driving box, a second connecting rod threadedly connected to the first lead screw, a first opening is provided on the side wall of the screening box, the first opening is respectively connected to the driving box and the screening box, the second connecting rod passes through the first opening and is fixedly connected to the first connecting rod adjacent to it.

[0009] Preferably, a feed pipe is provided at the bottom of the feed port, the feed pipe is connected to the inside of the screening box, the feed mechanism is provided outside the feed pipe, the feed mechanism includes a first opening and closing piece arranged in the feed pipe, the feed mechanism also includes a feed box arranged outside the feed pipe, a second opening and closing piece is provided below the first opening and closing piece, driving pieces are respectively provided on both sides of the feed box, the driving piece is transmission-connected to the second opening and closing piece, a sensor is provided between the first opening and closing piece, and the sensor is fixedly connected to the inner wall of the feed pipe.

[0010] Preferably, the second opening and closing member includes an opening and closing plate which is symmetrically and slidingly connected to the side wall of the feed pipe, one end of the opening and closing plate extends into the feed box and is drivingly connected to the driving member, the driving member includes a second motor fixedly connected to the inner wall of the feed box, the second motor is located above the opening and closing plate, the output shaft of the second motor is fixedly connected to a connecting roller, one end of a connecting rope is wound around the connecting roller, the other end of the connecting rope is fixedly connected to the opening and closing plate, a guide wheel is provided between the opening and closing plate and the connecting roller, the guide wheel is fixedly connected to the inner wall of the feed box, and the connecting rope passes through the guide wheel.

[0011] Preferably, the cleaning mechanism includes a cleaning box fixedly connected to the outside of the screening box, an air pump is provided in the cleaning box, the air pump is connected to a first air pipe, the first air pipe extends into the screening box at one end away from the air pump and is connected to a vertically arranged first connecting pipe, a plurality of second connecting pipes are evenly spacedly connected to the first connecting pipe, a plurality of air nozzles are evenly spacedly connected to the second connecting pipe, and the second connecting pipe is located above the screening plate adjacent to it.

[0012] Preferably, the cleaning mechanism further comprises a connecting box fixedly connected to the outside of the screening box, the connecting box is located at one end of the screening box away from the cleaning box, an induced draft fan is arranged in the connecting box, and the connecting box is communicated with the inside of the screening box.

[0013] Preferably, telescopic legs are fixedly connected to the four corners of the bottom surface of the screening box.

[0014] The present invention discloses the following technical effects: a feed port is provided at the top for receiving soil samples to be processed. A multi-level screening mechanism is configured internally, and the screening plates at each level are connected to an external collection box to ensure that particles of different particle sizes can be collected separately. The driving mechanism is located on one side of the screening box and is connected to the screening plate through a mechanical transmission system to provide power support for the screening process. The feeding mechanism can accurately control the amount of sample input each time to ensure the consistency and accuracy of the screening results. The cleaning mechanism not only simplifies the daily maintenance process, but also extends the service life of the screening plate and reduces the cost of long-term operation.

[0015] The multi-stage screening design greatly improves work efficiency and can complete screening tasks within a variety of particle size ranges in one operation, reducing repetitive work and time costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 It is a schematic diagram of the external structure of the field screening device for soil fine particle samples of the present invention;

[0018] Figure 2 It is a schematic diagram of the internal structure of the field screening device for soil fine particle samples of the present invention;

[0019] Figure 3 For the present invention Figure 2 A partial enlarged view of middle A;

[0020] Figure 4 It is a schematic structural diagram of the cleaning mechanism of the present invention.

[0021] In the figure: 1. screening box; 2. feed port; 3. collecting box; 4. first connecting plate; 5. screening plate; 6. second connecting plate; 7. first connecting shaft; 8. first connecting rod; 9. collecting port; 10. collecting plate; 11. driving box; 12. first motor; 13. first lead screw; 14. second connecting rod; 15. first opening; 16. feed pipe; 17. first opening and closing piece; 18. feed box; 19. sensor; 20. opening and closing plate; 21. second motor; 22. connecting roller; 23. connecting rope; 24. guide wheel; 25. cleaning box; 26. air pump; 27. first air pipe; 28. first connecting pipe; 29. ​​air nozzle; 30. connecting box; 31. induced draft fan; 32. telescopic leg. DETAILED DESCRIPTION

[0022] Soil fine particle screening technology plays an important role in geochemical exploration, especially in penetrating geochemical exploration. This technology can identify weak abnormal information of deep hidden ore bodies by screening and analyzing soil fine particle components. With the development of science and technology, soil fine particle screening devices are also constantly evolving to meet the needs of more efficient and accurate screening.

[0023] Soil fine particle separation technology is a penetrating geochemical technology developed in recent years. Its principle is based on the adsorption and exchangeability of fine-grained materials in the soil. These fine-grained materials are natural "capture wells" for active elements, which can capture information that migrates from deep to the surface. By separating the fine-grained components in the soil, active metal elements from deep ore bodies can be enriched, thereby achieving the purpose of identifying deep hidden mines.

[0024] This technology is suitable for the exploration of mineral resources such as non-ferrous metals, rare metals, precious metals, uranium, and rare earth in the coverage area. By physically separating the fine-grained components of the soil, the active metal elements can be effectively enriched, thereby identifying the weak geochemical anomalies caused by deep ore bodies, and then indicating deep hidden ore bodies. After migrating to the surface, the active metal elements are stored in the surface medium (such as soil) in various forms, such as ionic compounds, complexes, soluble salts, colloids, single particles, alloy particles, etc. These active metal elements are often positively charged and are easily adsorbed by negatively charged clay minerals, iron-manganese oxides, and organic matter in the soil.

[0025] Clay minerals are the most important secondary minerals in soil. They are mainly found in fine-grained soil components. They are charged on the surface and have a large specific surface area, making them ideal carriers for active metal elements. Iron-manganese oxides exist in large quantities in loose materials on the surface, and the surface of mineral particles is often covered with an iron-manganese oxide film. As the particle size of the sample decreases, the specific surface area of ​​iron-manganese oxides increases exponentially, thereby enhancing their ability to adsorb active metal elements.

[0026] Soil screening devices are an important part of soil fine particle separation technology. With the continuous advancement of technology, soil screening devices are also constantly innovating and improving to meet more complex and sophisticated screening needs.

[0027] Traditional soil screening device

[0028] Traditional soil screening devices usually use a simple screen structure to screen the soil by vibration or manual shaking. Although this device has a simple structure and is easy to operate, it has a low screening efficiency and is difficult to accurately screen fine-grained soil.

[0029] High efficiency soil screening device

[0030] In order to improve screening efficiency, modern soil screening devices use more advanced screening technology and structure. For example, by increasing the number of screen layers and mesh size, the graded screening of soils with different particle sizes can be achieved; by using driving devices such as vibration motors, the screening speed and efficiency can be improved; by optimizing the structure and layout of the screening box, the blockage and leakage during the screening process can be reduced.

[0031] Intelligent soil screening device

[0032] With the development of intelligent technology, intelligent soil screening devices have gradually emerged. These devices realize real-time monitoring and control of the screening process by integrating components such as sensors, controllers and actuators. For example, by monitoring parameters such as the vibration state of the screen, material flow and particle size distribution through sensors, the screening parameters can be adjusted in real time to optimize the screening effect; by realizing functions such as automatic cleaning and replacement of the screen through controllers and actuators, the screening efficiency and reliability can be further improved.

[0033] A soil screening device (CN 114260182 A)

[0034] The patent proposes a soil screening device, including a soil screening box, a control chamber, a mixing chamber, a transmission component and a mixing component. The soil screening box is provided with a garbage collection chamber, a soil screening chamber and a control chamber in sequence. The control chamber is provided with a mixing chamber, and the mixing chamber is provided with a feed port and a discharge port, and the discharge port is connected to the soil screening chamber. The mixing chamber is equipped with a transmission component that cooperates with the discharge port, and the soil screening box is equipped with a mixing component that cooperates with the mixing chamber. The soil screening chamber is provided with a first screening plate, a second screening plate and a soil collection container in sequence. The first screening plate and the second screening plate are both inclined, and are respectively provided with a plurality of first screening holes and a second screening hole. The garbage collection chamber is provided with a first garbage port and a second garbage port that are connected with the first screening plate.

[0035] The device stirs and mixes the soil through the stirring chamber, and then sends the soil to the soil screening chamber for screening through the transmission component. During the screening process, the soil passes through the first screening plate and the second screening plate in turn for graded screening. Large impurities and particles are screened out by the first screening plate and discharged through the first garbage port; smaller particles continue to be screened through the second screening plate, and finally a screened soil sample is obtained. The device has the advantages of high screening efficiency and high screening accuracy, and is suitable for applications such as heavy metal detection and pollution evaluation of soil.

[0036] A soil sample screening device for soil microorganism detection (CN117862003A)

[0037] The patent proposes a soil sample screening device for soil microorganism detection, including a shell, a screen, a rotating shaft, an extrusion assembly and other parts. A horizontal screen is arranged in the shell, and the inner cavity of the shell is cylindrical. The rotating shaft is connected to the shell along the vertical rotation, and a gap is left between the lower end of the rotating shaft and the central upper end surface of the screen. The rotating shaft is driven to rotate by a driving assembly, and the extrusion assembly includes a plurality of followers and a plurality of fixed parts, and the plurality of followers and the plurality of fixed parts are distributed along the radial direction of the rotating shaft.

[0038] The device can achieve the effect of squeezing out larger soil sample lumps through the extrusion assembly. The rotating shaft drives the follower to rotate along the middle of the shell. During the rotation, it will approach the dislocated fixing parts and squeeze out the soil sample lumps. This avoids the blockage of the screen by larger soil sample lumps and affects the overall screening efficiency. At the same time, the device is also equipped with components such as an exciter and an elastic member, and the screening efficiency and screening accuracy can be further improved through the vibration of the exciter. The device is suitable for applications such as soil microbial detection and can accurately screen and pre-treat soil samples.

[0039] A soil screening detection device (utility model patent)

[0040] This utility model patent proposes a soil screening detection device, including a basic component and a disassembly component. The basic component includes a support part, a screening part and a collection part. The screening part is arranged inside the support part, and the collection part is arranged below the support part. The device is also provided with components such as a rotating wheel, a threaded rod, a threaded groove, a moving plate, a positioning sleeve and a positioning rod, which are used to realize functions such as disassembly and cleaning of the screen plate.

[0041] When the sieve plate needs to be cleaned or maintained during use, the two wheels can be rotated in sequence, and the wheels drive the threaded rod to rotate inside the thread groove. The movable plate moves to the side away from the sieve plate under the action of the thread engagement until the movable plate is completely away from the sieve plate. Then the sieve plate can be moved upward so that the multiple positioning sleeves are detached from the positioning rods, and the sieve plate can be disassembled. The device has the advantages of easy disassembly, cleaning and maintenance of the sieve plate, which can improve the screening efficiency and reliability. At the same time, the device is also suitable for fields such as soil environmental monitoring, and can accurately screen and detect soil samples.

[0042] There are many technical challenges in the field screening of soil fine particles. The following is an analysis of these challenges and the corresponding solutions.

[0043] Technical Challenges

[0044] Low screening efficiency: Traditional soil screening devices have low screening efficiency and are difficult to meet the needs of large-scale field screening.

[0045] Low screening accuracy: For fine-grained soil samples, traditional screening devices are difficult to achieve accurate screening and grading.

[0046] Blockage and leakage problems: During the screening process, soil particles can easily block the screen or leak through the screen, resulting in poor screening effect.

[0047] The equipment is bulky and not portable: Traditional screening devices are usually large in size and heavy in weight, making them inconvenient to carry and operate in field environments.

[0048] Solution

[0049] Adopting high-efficiency screening technology: By adopting high-efficiency screening technology and structure such as vibration motor and multi-layer screen, the screening speed and efficiency can be improved. At the same time, by optimizing the screening parameters and layout, the screening effect can be further improved.

[0050] Improve screening accuracy: By increasing the number of meshes and layers of the screen, accurate screening and grading of fine-grained soil can be achieved. At the same time, more advanced screening materials and processes can be used to improve screening accuracy and stability.

[0051] Anti-clogging and leakage design: By optimizing the structure and layout of the screen, the occurrence of blockage and leakage can be reduced. For example, a backwashing device or a vibration device can be set up to remove particles blocked on the screen; at the same time, the screening effect can be optimized by adjusting parameters such as the inclination angle and vibration frequency of the screen.

[0052] Lightweight design: By using lightweight materials and optimizing the design structure, the weight and volume of the equipment can be reduced, making it easier to carry and operate in the field. For example, lightweight materials such as aluminum alloy can be used to make components such as screening boxes and screens; at the same time, the layout and connection methods of the equipment can be optimized to improve its portability and stability.

[0053] With the advancement of science and technology and the continuous development of geochemical exploration technology, field screening devices for soil fine particle samples will also show the following development trends:

[0054] Intelligence and automation: In the future, field screening devices for fine soil particles will be more intelligent and automated. By integrating components such as sensors, controllers, and actuators, real-time monitoring and control of the screening process can be achieved. For example, the vibration state of the screen, material flow, and particle size distribution can be monitored by sensors; the automatic adjustment and optimization of screening parameters can be achieved through controllers; and the automatic cleaning and replacement of the screen can be achieved through actuators. This will further improve screening efficiency and reliability and reduce manual operation costs.

[0055] Efficiency and refinement: In order to improve screening efficiency and accuracy, future field screening devices for fine soil particles will focus more on efficient and refined design. For example, multi-layer screens and vibration motor equalization technology and structure can be used to achieve rapid classification and accurate screening of soil particles. At the same time, by optimizing the material, aperture, layout and other parameters of the screen, the screening accuracy and stability can be further improved to meet the high-precision screening requirements for fine-grained soil samples.

[0056] Portability and lightweight: In order to meet the needs of field operations, future field screening devices for soil fine particles will pay more attention to portability and lightweight design. By adopting lightweight materials, foldable structures, and quick-detachable connections, the weight and volume of the equipment can be reduced, making it easier to carry and operate. This will enable soil fine particle screening technology to be more widely used in various field environments and geological exploration projects.

[0057] Multifunctionality and integration: In the future, field screening devices for fine soil particles will tend to be multifunctional and integrated. In addition to the basic screening function, other related functions can also be integrated, such as soil sample collection, pretreatment, detection and analysis. This will make the soil fine particle screening device a comprehensive geochemical exploration tool, providing more comprehensive and accurate data support for geological exploration.

[0058] Environmental protection and sustainability: With the continuous improvement of environmental awareness, future field screening devices for soil fine particle samples will pay more attention to environmental protection and sustainable design. For example, degradable materials can be used to make screens and screening boxes to reduce the impact on the environment; at the same time, by optimizing the screening process and parameters, energy consumption and waste emissions can be reduced, and green screening and sustainable development can be achieved.

[0059] Field screening devices for fine soil particles play an important role in geochemical exploration. Through the screening and analysis of fine soil particle components, weak abnormal information of deep hidden ore bodies can be identified. With the advancement of science and technology and the continuous development of geochemical exploration technology, field screening devices for fine soil particles are also constantly evolving and improving. From the traditional simple screen structure to the modern efficient, intelligent and portable screening device, soil fine particle screening technology has made significant progress.

[0060] In the future, field screening devices for soil fine-particle samples will continue to develop in the direction of intelligence, efficiency, refinement, portability, multi-function and environmental sustainability. This will make soil fine-particle screening technology more adaptable to the needs of field operations and provide more accurate, comprehensive and efficient data support for geological exploration. At the same time, with the continuous emergence of new materials, new processes and new technologies, the performance and efficiency of soil fine-particle screening devices will be further improved, injecting new vitality and impetus into the development of geochemical exploration technology.

[0061] While looking forward to the future, we should also see that there are still some challenges and problems in the current soil fine particle screening technology. For example, how to further improve the screening accuracy and efficiency, how to reduce the occurrence of blockage and missed screening, how to reduce equipment costs and operational complexity, etc. These problems require us to continue to explore and innovate in future research and development to promote the continuous progress and development of soil fine particle screening technology.

[0062] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0064] Reference Figure 1-Figure 4 As shown, this embodiment provides a field screening device for soil fine particle samples, including a screening box 1, a feed port 2 is provided on the top surface of the screening box 1, a feed mechanism is provided on the feed port 2, a multi-stage screening mechanism is provided in the screening box 1, the multi-stage screening mechanism is connected to a plurality of collecting boxes 3, the collecting boxes 3 are located on the outside of the screening box 1, a driving mechanism is fixedly connected to the side of the screening box 1 away from the collecting box 3, the driving mechanism extends into the screening box 1 and is transmission-connected to the multi-stage screening mechanism, and a cleaning mechanism is provided in the screening box 1.

[0065] A feed port 2 is provided on the top for receiving the soil sample to be processed. A multi-stage screening mechanism is configured inside, and the screening plate 5 of each level is connected to the external collection box 3 to ensure that particles of different particle sizes can be collected separately. The driving mechanism is located on one side of the screening box 1 and is connected to the screening plate 5 through a mechanical transmission system to provide power support for the screening process. The feeding mechanism can accurately control the amount of sample input each time to ensure the consistency and accuracy of the screening results. The cleaning mechanism not only simplifies the daily maintenance process, but also extends the service life of the screening plate 5 and reduces the cost of long-term operation.

[0066] The multi-stage screening design greatly improves work efficiency and can complete screening tasks within a variety of particle size ranges in one operation, reducing repetitive work and time costs.

[0067] A further optimized solution is that the multi-stage screening mechanism includes a first connecting plate 4 symmetrically fixed in the screening box 1, the first connecting plate 4 is located at one end close to the collecting box 3, a plurality of screening plates 5 are rotatably connected between the two first connecting plates 4 at equal intervals, the screening plates 5 are connected to the collecting box 3 located at the same horizontal position therewith, and one end of the screening plate 5 away from the first connecting plate 4 is transmission connected to the driving mechanism.

[0068] The first connecting plate 4 is symmetrically fixed inside the screening box 1 at one end close to the collecting box 3 to play a supporting and positioning role.

[0069] According to a further optimization scheme, a second connecting plate 6 is fixedly connected to one side of the screening plate 5 close to the driving mechanism, a first groove is provided in the second connecting plate 6, a first connecting shaft 7 is rotatably connected in the first groove, a first connecting rod 8 is fixedly connected between two adjacent first connecting shafts 7, and the first connecting rod 8 is transmission-connected to the driving mechanism.

[0070] According to a further optimization scheme, a collecting port 9 is provided on one side of the screening box 1 close to the collecting box 3 , and a collecting plate 10 is fixedly connected to the bottom of the collecting port 9 , which is located below the screening plate 5 adjacent thereto.

[0071] A plurality of screening plates 5 are evenly distributed between the two first connecting plates 4, thereby achieving efficient screening operation. Each screening plate 5 is directly connected to a specific collecting box 3, ensuring that the screened particles can accurately fall into the corresponding collecting container.

[0072] A further optimized solution is that the driving mechanism includes a driving box 11 fixedly connected to the outside of the screening box 1, a first motor 12 fixedly connected in the driving box 11, one end of a first lead screw 13 fixedly connected to the output shaft of the first motor 12, the other end of the first lead screw 13 is rotatably connected to the top surface of the driving box 11, a second connecting rod 14 is threadedly connected to the first lead screw 13, a first opening 15 is provided on the side wall of the screening box 1, the first opening 15 is respectively connected to the driving box 11 and the screening box 1, the second connecting rod 14 passes through the first opening 15 and is fixedly connected to the first connecting rod 8 adjacent to it.

[0073] Start the first motor 12, and the output shaft of the first motor 12 drives the first screw 13 to rotate. The first screw 13 drives the second connecting rod 14 to move up and down in the first opening 15, thereby driving the first connecting rod 8 to move up and down, so that the first connecting rod 8 drives the multiple screening plates 5 to rotate, and the soil is screened in multiple stages.

[0074] A further optimized solution is that a feed pipe 16 is provided at the bottom of the feed port 2, the feed pipe 16 is connected to the inside of the screening box 1, a feed mechanism is provided outside the feed pipe 16, the feed mechanism includes a first opening and closing member 17 arranged in the feed pipe 16, the feed mechanism also includes a feed box 18 arranged outside the feed pipe 16, a second opening and closing member is provided below the first opening and closing member 17, driving members are respectively provided on both sides of the feed box 18, the driving member is transmission-connected with the second opening and closing member, a sensor 19 is provided between the first opening and closing member 17 and the first opening and closing member 17, and the sensor 19 is fixedly connected to the inner wall of the feed pipe 16.

[0075] A further optimized solution is provided, wherein the second opening and closing member comprises an opening and closing plate 20 symmetrically and slidingly connected to the side wall of the feed pipe 16, one end of the opening and closing plate 20 extends into the feed box 18 and is transmission-connected to a driving member, the driving member comprises a second motor 21 fixedly connected to the inner wall of the feed box 18, the second motor 21 is located above the opening and closing plate 20, the output shaft of the second motor 21 is fixedly connected to a connecting roller 22, one end of a connecting rope 23 is wound around the connecting roller 22, the other end of the connecting rope 23 is fixedly connected to the opening and closing plate 20, a guide wheel 24 is provided between the opening and closing plate 20 and the connecting roller 22, the guide wheel 24 is fixedly connected to the inner wall of the feed box 18, and the connecting rope 23 passes through the guide wheel 24.

[0076] The feed pipe 16 connects the feed port 2 and the interior of the screening box 1, in which two layers of opening and closing parts are provided. The first opening and closing part 17 is an iris structure when started. This is a prior art and will not be described in detail here. The opening and closing state is controlled by the second motor 21 to achieve precise control of the speed and amount of materials entering the screening box 1. A sensor 19 is provided between the two opening and closing parts to monitor the material flow in real time to avoid overload or blockage.

[0077] A further optimized solution is that the cleaning mechanism includes a cleaning box 25 fixedly connected to the outside of the screening box 1, an air pump 26 is provided in the cleaning box 25, the air pump 26 is connected to a first air pipe 27, one end of the first air pipe 27 away from the air pump 26 extends into the screening box 1 and is connected to a vertically arranged first connecting pipe 28, a plurality of second connecting pipes are evenly spacedly connected to the first connecting pipe 28, a plurality of air nozzles 29 are evenly spacedly connected to the second connecting pipe, and the second connecting pipe is located above the screening plate 5 adjacent to it.

[0078] High-pressure gas is introduced into the interior of the screening box 1 through the first air pipe 27 , and air is blown onto each screening plate 5 using the air nozzle 29 , so as to effectively remove the residues and keep the screening plates 5 clean.

[0079] According to a further optimization scheme, the cleaning mechanism also includes a connecting box 30 fixedly connected to the outside of the screening box 1 . The connecting box 30 is located at an end of the screening box 1 away from the cleaning box 25 . An induced draft fan 31 is provided in the connecting box 30 . The connecting box 30 is connected to the inside of the screening box 1 .

[0080] The induced draft fan 31 is placed in the connection box 30 at the other end of the screening box 1, and is responsible for extracting dust and other impurities generated during the screening and cleaning process to maintain a clean working environment.

[0081] According to a further optimized solution, telescopic legs 32 are fixedly connected to the four corners of the bottom surface of the screening box 1 .

[0082] The telescopic legs 32 at the four corners allow the entire device to be adjusted in height according to the actual terrain, ensuring stable placement while also facilitating transportation and handling.

[0083] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0084] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A field screening device for soil fine particle samples, characterized in that: The invention comprises a screening box (1), the top surface of the screening box (1) is provided with a feed port (2), the feed port (2) is provided with a feed mechanism, a multi-stage screening mechanism is provided inside the screening box (1), the multi-stage screening mechanism is connected to a plurality of collecting boxes (3), the collecting boxes (3) are located outside the screening box (1), a driving mechanism is fixedly connected to a side of the screening box (1) away from the collecting box (3), the driving mechanism extends into the screening box (1) and is transmission-connected to the multi-stage screening mechanism, and a cleaning mechanism is provided inside the screening box (1).

2. The field screening device for soil fine particle samples according to claim 1 is characterized in that: The multi-stage screening mechanism comprises a first connecting plate (4) symmetrically fixedly connected in the screening box (1), the first connecting plate (4) being located at one end close to the collecting box (3), a plurality of screening plates (5) being rotatably connected at equal intervals between two of the first connecting plates (4), the screening plates (5) being connected to the collecting box (3) located at the same horizontal position therewith, and the end of the screening plate (5) away from the first connecting plate (4) being transmission-connected to the driving mechanism.

3. The field screening device for soil fine particle samples according to claim 2 is characterized in that: A second connecting plate (6) is fixedly connected to one side of the screening plate (5) close to the driving mechanism, a first groove is provided in the second connecting plate (6), a first connecting shaft (7) is rotatably connected in the first groove, a first connecting rod (8) is fixedly connected between two adjacent first connecting shafts (7), and the first connecting rod (8) is transmission-connected to the driving mechanism.

4. The field screening device for soil fine particle samples according to claim 2 is characterized in that: The screening box (1) is provided with a collecting port (9) on one side close to the collecting box (3), and a collecting plate (10) is fixedly connected to the bottom of the collecting port (9) and is located below the screening plate (5) adjacent thereto.

5. The field screening device for soil fine particle samples according to claim 3 is characterized in that: The driving mechanism comprises a driving box (11) fixedly connected to the outside of the screening box (1), a first motor (12) fixedly connected inside the driving box (11), an output shaft of the first motor (12) fixedly connected to one end of a first lead screw (13), the other end of the first lead screw (13) being rotatably connected to the top surface inside the driving box (11), a second connecting rod (14) being threadedly connected to the first lead screw (13), a side wall of the screening box (1) being provided with a first opening (15), the first opening (15) being respectively connected to the driving box (11) and the screening box (1), the second connecting rod (14) passing through the first opening (15) and being fixedly connected to the first connecting rod (8) adjacent thereto.

6. The field screening device for soil fine particle samples according to claim 1, characterized in that: A feed pipe (16) is provided at the bottom of the feed port (2), the feed pipe (16) is connected to the inside of the screening box (1), the feed mechanism is provided outside the feed pipe (16), the feed mechanism comprises a first opening and closing member (17) arranged in the feed pipe (16), the feed mechanism also comprises a feed box (18) arranged outside the feed pipe (16), a second opening and closing member is provided below the first opening and closing member (17), driving members are respectively provided on both sides of the feed box (18), the driving member is transmission-connected to the second opening and closing member, a sensor (19) is provided between the first opening and closing member (17), and the sensor (19) is fixedly connected to the inner wall of the feed pipe (16).

7. The field screening device for soil fine particle samples according to claim 6 is characterized in that: The second opening and closing member comprises an opening and closing plate (20) symmetrically and slidingly connected to the side wall of the feed pipe (16), one end of the opening and closing plate (20) extends into the feed box (18) and is transmission-connected to the driving member, the driving member comprises a second motor (21) fixedly connected to the inner wall of the feed box (18), the second motor (21) is located above the opening and closing plate (20), the output shaft of the second motor (21) is fixedly connected to a connecting roller (22), one end of a connecting rope (23) is wound around the connecting roller (22), the other end of the connecting rope (23) is fixedly connected to the opening and closing plate (20), a guide wheel (24) is provided between the opening and closing plate (20) and the connecting roller (22), the guide wheel (24) is fixedly connected to the inner wall of the feed box (18), and the connecting rope (23) passes through the guide wheel (24).

8. The field screening device for soil fine particle samples according to claim 1 is characterized in that: The cleaning mechanism comprises a cleaning box (25) fixedly connected to the outside of the screening box (1), an air pump (26) being arranged in the cleaning box (25), the air pump (26) being connected to a first air pipe (27), one end of the first air pipe (27) away from the air pump (26) extending into the screening box (1) and being connected to a first vertically arranged connecting pipe (28), a plurality of second connecting pipes being connected to the first connecting pipe (28) at equal intervals, a plurality of air nozzles (29) being connected to the second connecting pipe at equal intervals, and the second connecting pipe being located above the screening plate (5) adjacent thereto.

9. The field screening device for soil fine particle samples according to claim 8, characterized in that: The cleaning mechanism further comprises a connection box (30) fixedly connected to the outside of the screening box (1); the connection box (30) is located at one end of the screening box (1) away from the cleaning box (25); an induced draft fan (31) is provided in the connection box (30); and the connection box (30) is in communication with the screening box (1).

10. The field screening device for soil fine particle samples according to claim 1, characterized in that: Telescopic legs (32) are respectively fixedly connected to the four corners of the bottom surface of the screening box (1).

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