A wet soil grinding pretreatment apparatus

Abstract

The application belongs to the technical field of soil detection equipment, and proposes a wet soil grinding pretreatment equipment, characterized in that the wet soil grinding pretreatment equipment comprises an outer cabinet, a pressing and dispersing mechanism, an air-drying and conveying mechanism and a rolling mechanism, the pressing and dispersing mechanism comprises a pressing mechanism and a plurality of sample plates, the lower end of the pressing mechanism is provided with a pressing plate, the sample plates are located below the pressing plate, the air-drying and conveying mechanism is provided with a conveying belt, a plurality of turnover plates are arranged on the conveying belt, one side of the conveying belt is provided with the pressing and dispersing mechanism, and the other side is provided with a sliding plate, and the lower end of the sliding plate is provided with the rolling mechanism. The application solves the problems of long time required for air-drying of wet soil and large clumps after direct air-drying which are not easy to grind.

Description

Technical Field

[0001] This invention belongs to the technical field of soil testing equipment and relates to a wet soil grinding and pretreatment device. Background Technology

[0002] Soil testing is a crucial part of environmental monitoring. Analyzing heavy metal content in soil requires grinding the soil samples. However, often the soil samples are quite wet, which cannot be directly ground for testing; dried soil samples are necessary. The traditional method involves air-drying or heat-drying the collected wet soil samples before placing them directly into a grinding jar for fine grinding. However, manual drying results in uneven thickness of the wet soil, leading to prolonged drying time and delays in the overall testing process. Furthermore, the thicker dried soil clumps are larger, making grinding difficult, time-consuming, and damaging to the grinding equipment. Therefore, pretreatment of wet soil is necessary. Summary of the Invention

[0003] This invention proposes a wet soil grinding pretreatment device, which solves the above-mentioned problems.

[0004] The technical solution of this invention is implemented as follows:

[0005] A wet soil grinding pretreatment device includes:

[0006] The device includes a pressing and dispersing mechanism, an air-drying and conveying mechanism, a compaction mechanism, and an outer cabinet. The pressing and dispersing mechanism comprises a pressing mechanism and several sample trays. A pressing plate is provided at the lower end of the pressing mechanism, and the sample trays are located below the pressing plate. A conveyor belt is provided on the air-drying and conveying mechanism, and several tilting plates are provided on the conveyor belt. The pressing and dispersing mechanism is provided on one side of the conveyor belt, and a sliding plate is provided on the other side. The compaction mechanism is provided at the lower end of the sliding plate.

[0007] As a further technical solution, the lower pressure plate includes a first lower pressure plate and a second lower pressure plate. A groove is provided below the first lower pressure plate, and a spring is provided in the groove. The second lower pressure plate is connected to the first lower pressure plate through the spring. The cross-section of the groove is the same as the cross-section of the second lower pressure plate, but smaller than the cross-section of the first lower pressure plate.

[0008] As a further technical solution, the sample tray includes a tray bottom and a tray edge, and a plurality of partition columns are provided on the tray bottom, the height of which is lower than that of the tray edge.

[0009] 1. As a further technical solution, a load-bearing plate is provided below the lower pressure plate, and a slide groove is provided on the load-bearing plate. The sample tray is placed in the slide groove. A sample inlet gate is provided on one side of the slide groove, and a sensor is provided on the other side near the position of the flip plate. The plurality of flip plates are evenly arranged on the conveyor belt.

[0010] As a further technical solution, the flipping plate includes a first flipping plate and a second flipping plate. The first flipping plate is provided with an inverted U-shaped strip, the height of which is greater than that of the sample tray. The second flipping plate is disposed on the conveyor belt, and one end of which is connected to one end of the first flipping plate via a hinge. The flipping angle between the first flipping plate and the second flipping plate is no greater than 90°. The conveyor belt is vertically arranged, and the tilt angle of the lower slide plate is 45° to 75°.

[0011] As a further technical solution, the compaction mechanism includes a sample receiving platform and a compaction rod, and a compaction groove is provided on the upper part of the sample receiving platform.

[0012] As a further technical solution, the bottom of the compaction trough is arc-shaped, the lower end of the compaction rod is provided with a cylindrical rolling wheel, a storage cabinet is provided on one side of the sample receiving platform, the flipping plate is located in the middle of the conveyor belt, and guardrails are provided on both sides of the conveyor belt.

[0013] As a further technical solution, the outer cabinet includes a first outer cabinet and a second outer cabinet. The downward dispersing mechanism and the air drying and transmission mechanism are respectively disposed in the first outer cabinet and the second outer cabinet. The lower part of one side of the first outer cabinet is connected to the lower part of one side of the second outer cabinet through a sliding door. The lower part of the other side of the first outer cabinet is provided with the sample inlet door. The upper part of the other side of the second outer cabinet is provided with the sample outlet door. The lower part of the second outer cabinet is provided with an air inlet mechanism and an inspection door. The top is provided with an air outlet. The inspection door is provided with an observation window.

[0014] As a further technical solution, a sample quantity standard line is set on the bottom of the pan, the pan edge is 4cm to 6cm high, the separator is 1cm to 1.5cm high, the separator is frustum-shaped, the upper base of the frustum-shaped separator is smaller than the lower base, and the lower base is set on the bottom of the pan.

[0015] As a further technical solution, the upper part of the pressing mechanism is a sliding connecting rod or a hydraulic cylinder, the conveyor belt is driven by a motor, the sensor is connected to the motor, the air inlet mechanism includes a fan and a temperature-regulating heater, and the sensor is a pressure sensor.

[0016] The working principle and beneficial effects of this invention are as follows:

[0017] 1. In use, this invention first places an appropriate amount of wet soil onto the sample tray, then places the sample tray directly under the pressing plate of the pressing mechanism. The pressing mechanism is then activated, and the pressing plate begins to press down on the wet soil in the sample tray, evenly dispersing, flattening, and thinning the soil onto the sample tray. This disperses the large clumps of wet soil that were originally stuck together into thin sheets, which not only facilitates rapid air drying and saves drying time, but also makes subsequent soil grinding easier, reducing grinding time, extending the service life of the grinding equipment, and shortening the entire soil sample collection and testing cycle, thus greatly improving work efficiency. After the wet soil is pressed into a thin sheet on the sample tray, the lower platen rises. At the same time, another sample tray is manually pushed in, which pushes the already compressed sample tray onto a flipping plate of the air-drying conveyor mechanism. Then, the motor drives the conveyor belt to slowly move a certain distance, and the flipping plate containing the sample tray moves upward a certain distance accordingly. After the required number of sample trays are placed on several flipping plates, the conveyor belt stops moving. At the same time, cold or warm air is activated as needed to air-dry the wet soil that has been pressed into a thin sheet on the sample tray. In this way, soil samples of the same batch are air-dried in the same environment for the same amount of time, reducing the influence of the external environment. At the same time, an appropriate air-drying temperature can be used according to the sample testing requirements to avoid damaging the soil sample, thus improving the speed while ensuring the accuracy of subsequent testing. After the wet soil dries, the conveyor belt is activated to drive the tilting plate. The sample tray on the tilting plate is then sent to the sliding plate. The sample tray, along with the pressed and dried soil, slides down the sliding plate into the compaction mechanism. During the process of sliding into the compaction mechanism, most of the pressed and dried soil will detach from the sample tray. After entering the compaction mechanism, some sample trays can be manually picked out. If there are any soil pieces that have not detached from the sample tray, they can be manually tapped to detach them. Then, manual compaction can easily break the dried soil pieces into small, thin pieces of soil. This pre-treated soil sample is more conducive to further grinding needs, improves grinding efficiency, avoids damage to the grinding equipment, and allows the used sample tray to be used for the pre-treatment of another wet soil sample after simple cleaning, avoiding soil sample residue and ensuring accurate subsequent testing.

[0018] 2. During the downward pressing process, the second pressing plate first contacts the wet soil on the sample tray. As the pressing pressure increases, the second pressing plate compresses the spring upwards, causing it to enter the groove below the first pressing plate. At this point, the first pressing plate has not yet contacted the wet soil. The wet soil compressed by the second pressing plate will disperse to the outside of the second pressing plate and below the first pressing plate. Subsequently, as the first pressing plate is pressed down, the wet soil will disperse to the outside of the first pressing plate, ensuring more uniform distribution of the soil in the sample tray. When the pressing stops at a certain point, since the cross-section of the groove is the same as the cross-section of the second pressing plate, the second pressing plate just enters the groove. At this point, the bottom surfaces of the first and second pressing plates are on the same plane, preventing soil from entering the groove. After the soil sheet is pressed, the lower pressing plate begins to rise. At this time, the first lower pressing plate rises first. Due to the elastic force of the spring, the second lower pressing plate cannot leave the soil sheet, while the soil sheet at the bottom of the first lower pressing plate will detach. As the lower pressing plate rises, the second lower pressing plate rises as well. Under the action of gravity, especially the gravity of the soil sheet at the periphery that has already detached from the bottom of the first lower pressing plate, the soil sheet at the bottom of the second lower pressing plate easily detaches and remains in the sample tray. This ensures that the soil sheet detaches from the lower pressing plate quickly, ensuring the pressing effect and effectively avoiding soil sample residue.

[0019] 3. During the pressing of wet soil samples, the edge of the tray effectively prevents wet soil from being squeezed out of the sample tray, avoiding soil sample leakage and reducing the frequency of equipment cleaning. Several separators on the bottom of the tray can pass through the wet soil sheet, creating several holes on the wet soil sheet. This increases air permeability, which is beneficial for the rapid air drying of the soil later. It also makes it easier to roll and break up the dried soil sheet later. Because the separators have a certain height, this prevents the wet soil sample from being over-compacted, ensuring that the soil sheet is easy to roll and break up later. At the same time, the presence of several separators on the bottom of the tray increases the friction between the soil sheet and the sample tray, making it easier for the wet soil sheet to detach from the lower plate and remain on the sample tray, ensuring the smooth progress of the pressing process.

[0020] 4. The load-bearing plate supports the sample tray and bears the pressure from the lower pressure plate. The groove on the load-bearing plate is located directly below the lower pressure plate, ensuring that the sample tray is accurately positioned when placed in the tray. This allows the wet soil in the sample tray to be compressed into a thin sheet, preventing tilting. Furthermore, the groove allows the compressed sample tray to be pushed along the groove as the next sample tray is pushed in through the inlet gate, passing the sensor-equipped end of the groove and reaching the corresponding flip plate. Simultaneously, the sensor sends a signal, causing the conveyor belt to move the flip plate containing the sample tray a certain distance. The next flip plate will then move the same distance, aligning with the sensor-equipped side of the groove. This process is repeated as the next sample tray passes the sensor and reaches the flip plate. In this way, the compressed wet soil is smoothly delivered to the drying conveyor mechanism, preparing it for the next drying step.

[0021] 5. The compressed wet soil sample tray is pushed through the inverted U-shaped strip on the first rotating plate and placed on it. At this point, the angle between the first and second rotating plates is 90°, meaning the first rotating plate is perpendicular to one side of the conveyor belt. The sample tray can be placed relatively stably on the first rotating plate. As the rotating plates move upward, the inverted U-shaped strip prevents the sample tray from tipping over, avoiding soil sample loss. If the angle between the first and second rotating plates is less than 90°, meaning the first rotating plate is tilted upward, the inverted U-shaped strip prevents the sample tray from tipping over due to tilting, thus keeping the sample tray on the first rotating plate. After the soil sample is air-dried, the conveyor belt starts moving. When the first rotating plate passes the highest point of the conveyor belt, the first rotating plate begins to rotate, and the sample tray begins to slide inverted into the lower slide plate. Because it is inverted, the air-dried soil pieces detach from the sample tray as it slides down the lower slide plate, falling together into the compaction mechanism, essentially achieving complete detachment. Furthermore, after passing the highest point of the conveyor belt, the first tilting plate is now parallel to the conveyor belt, which not only allows the sample tray and the dried soil sample to detach smoothly but also saves equipment space. It also prevents any soil sample residue on the first tilting plate from falling to the bottom of the equipment, reducing the frequency of cleaning. The vertical arrangement of the conveyor belt saves floor space. The downward tilt angle of the slide plate is 45°–75°, allowing the sample tray and dried soil sample to slide smoothly into the compaction mechanism, with the optimal sliding effect at a 60° angle.

[0022] 6. The compaction groove on the sample receiving platform is directly below the lower end of the sliding plate. The sample tray and the air-dried soil sample will slide into the compaction groove along the sliding plate. During the sliding process, the sample tray and the air-dried soil sample will basically separate. At this time, the sample tray can be manually picked out, leaving only the air-dried soil sample in the compaction groove. Then, the air-dried soil sample can be manually compacted with a compaction rod. Since the air-dried soil sample is already a thin sheet with holes, only light compaction is needed to achieve rapid soil crushing and good crushing effect.

[0023] 7. The rounded bottom of the compaction trough facilitates the crushing of the air-dried soil flakes. The cylindrical rollers at the lower end of the rolling rollers further break the flakes into smaller particles, which is beneficial for subsequent precise grinding. After compaction, the rolling rollers can be stored in the storage cabinet, which can also hold any unused sample trays. The baffles on both sides of the conveyor belt ensure that any small amount of soil spilled during the first tilting plate falls downwards, preventing it from spilling onto the sides of the conveyor belt and ensuring the overall cleanliness of the equipment.

[0024] 8. The first and second outer cabinets divide the outer cabinet into two parts, ensuring that the pressure dispersion mechanism and the air-drying conveyor mechanism operate in separate spaces without interfering with each other. Simultaneously, only when the air-drying conveyor mechanism begins temperature-controlled drying should the sliding door be pushed inwards to completely isolate the pressure dispersion mechanism and the air-drying conveyor mechanism, allowing hot or cold air to remain only in the air-drying conveyor mechanism to avoid energy loss. At other times, the sliding door should be pulled outwards to ensure that the sample tray can smoothly enter the air-drying conveyor mechanism from the pressure dispersion mechanism. When the equipment starts working, the sample tray containing wet soil is pushed into the chute through the sample inlet door. After drying, the sample tray and dried soil sheet are slid out through the sample outlet door via the sliding plate. The air inlet mechanism mainly blows hot or cold air into the air-drying conveyor mechanism to promote rapid drying of the wet soil sheet, while the air outlet facilitates moisture evaporation, resulting in better drying effects. The dryness of the wet soil sheets can be observed through the observation window on the maintenance door, allowing for adjustment of the drying temperature as needed. It also allows for checking whether the interior needs cleaning or if there are any malfunctions. If necessary, the maintenance door can be opened for cleaning or maintenance.

[0025] 9. To ensure the appropriate thickness of the pressed wet soil slices, facilitating subsequent air drying and crushing, when placing the wet soil onto the sample tray, the cross-section of the wet soil should ideally align with the sample volume standard line on the bottom of the tray, and the height should match the height of the tray rim (4-6 cm high). The height of the separator should be one-third of the tray rim height. This results in a thinner slice that easily detaches completely from the lower platen. The separator should be a frustum-shaped column with an upper base smaller than the lower base. This design allows the air-dried soil slices to detach more easily from the sample tray when it is flipped on the first rotating plate and transferred to the lower platen, minimizing manual operation, saving time, and improving efficiency.

[0026] 10. During operation, the pressing mechanism uses a sliding linkage or hydraulic cylinder to achieve pressing and lifting. When the sample tray passes the pressure sensor, the sensor transmits a signal to the motor. The motor then starts, driving the conveyor belt a certain distance; the speed of movement can be adjusted as needed. The fan can blow air into the second outer cabinet; the wind speed is adjustable. Whether the incoming air is natural or heated air can be adjusted by regulating the temperature control heater. This setup ensures the normal and efficient operation of the entire equipment, providing excellent pretreatment results for wet soil, significantly saving time and shortening the entire soil sampling and testing cycle. Attached Figure Description

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the pressing mechanism in this invention;

[0030] Figure 3 This is a schematic diagram of the sample disk structure in this invention;

[0031] Figure 4 This is another schematic diagram of the sample tray in this invention;

[0032] Figure 5 This is a schematic diagram of the flip-up plate structure in this invention;

[0033] Figure 6 This is a schematic diagram of the external structure of the present invention;

[0034] In the diagram: 1-Pressing and dispersing mechanism, 11-Pressing mechanism, 12-Sample tray, 121-Pattern bottom, 122-Pattern rim, 123-Separating column, 124-Sample volume standard line, 13-Pressing plate, 131-First pressing plate, 132-Second pressing plate, 133-Groove, 134-Spring, 14-Bearing plate, 15-Slide groove, 16-Sample inlet gate, 17-Sensor, 2-Air drying and conveying mechanism, 21-Conveyor belt, 22-Tilting plate, 221-First pressing plate 1-Flip-over plate, 222-Second flip-over plate, 223-Inverted U-shaped strip, 224-Hinge, 23-Lower slide plate, 24-Blocking strip, 3-Rolling mechanism, 31-Sample receiving platform, 32-Rolling rod, 33-Rolling groove, 34-Cylindrical roller, 35-Storage cabinet, 4-Outer cabinet, 41-First outer cabinet, 42-Second outer cabinet, 43-Sliding door, 44-Sample exit door, 45-Air outlet, 5-Air inlet mechanism, 6-Inspection door, 7-Observation window. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figures 1-6 As shown, the present invention proposes a wet soil grinding pretreatment device, comprising:

[0037] The device comprises a pressing and dispersing mechanism 1, an air-drying and conveying mechanism 2, a crushing mechanism 3, and an outer cabinet 4. The pressing and dispersing mechanism 1 includes a pressing mechanism 11 and several sample trays 12. A pressing plate 13 is provided at the lower end of the pressing mechanism 11, and the sample trays 12 are located below the pressing plate 13. A conveyor belt 21 is provided on the air-drying and conveying mechanism 2, and several flipping plates 22 are provided on the conveyor belt 21. The pressing and dispersing mechanism 1 is provided on one side of the conveyor belt 21, and a sliding plate 23 is provided on the other side. The crushing mechanism 3 is provided at the lower end of the sliding plate 23.

[0038] In this invention, an appropriate amount of wet soil is first placed on the sample tray 12, and then the sample tray 12 is placed directly below the pressing plate 13 of the pressing mechanism 11. The pressing mechanism 11 is then activated, and the pressing plate 13 begins to press down on the wet soil in the sample tray 12, dispersing, flattening, and pressing the wet soil evenly onto the sample tray 12. This disperses the large clumps of wet soil that were originally stuck together into thin sheets, which not only facilitates rapid air drying and saves drying time, but also makes subsequent soil grinding easier, reduces grinding time, extends the service life of the grinding equipment, and shortens the entire cycle from soil sampling to testing, greatly improving work efficiency. After the wet soil is pressed into a thin sheet on the sample tray 12, the lower platen 13 rises. At the same time, another sample tray 12 is manually pushed in, which pushes the already compressed sample tray 12 onto a flipping plate 22 of the air-drying conveyor mechanism 2. Then, the motor drives the conveyor belt 21 to slowly move a certain distance, and the flipping plate 22 containing the sample tray 12 moves upward a certain distance. After the required number of sample trays 12 are placed on several flipping plates 22, the conveyor belt 21 stops moving. At the same time, cold or warm air is started as needed to air-dry the wet soil that has been pressed into a thin sheet on the sample tray 12. In this way, soil samples of the same batch are air-dried in the same environment for the same amount of time, reducing the influence of the external environment. At the same time, an appropriate air-drying temperature can be used according to the testing requirements of the sample to avoid damaging the soil sample, thus improving the speed while ensuring the accuracy of subsequent testing. After the wet soil dries, the conveyor belt 21 is started to drive the tilting plate 22. The sample tray 12 on the tilting plate 22 will be sent to the sliding plate 23. The sample tray 12, along with the pressed and dried soil, will slide down the sliding plate 23 into the compaction mechanism 3. During the process of sliding into the compaction mechanism 3, most of the pressed and dried soil will detach from the sample tray 12. After entering the compaction mechanism 3, some sample trays 12 can be manually picked out. If there are soil pieces that have not detached from the sample tray 12, they can also be manually tapped to detach them. Then, manual compaction can easily break the dried soil pieces into small, thin pieces of soil. This pre-treated soil sample is more conducive to further grinding needs, improves grinding efficiency, and avoids damage to the grinding equipment. At the same time, the used sample tray 12 can be used for the pre-treatment of another wet soil sample after simple cleaning, avoiding soil sample residue and ensuring accurate subsequent testing.

[0039] As a further technical solution, the lower pressure plate 13 includes a first lower pressure plate 131 and a second lower pressure plate 132. A groove 133 is provided below the first lower pressure plate 131, and a spring 134 is provided in the groove 133. The second lower pressure plate 132 is connected to the first lower pressure plate 131 through the spring 134. The cross-section of the groove 133 is the same as the cross-section of the second lower pressure plate 132, but smaller than the cross-section of the first lower pressure plate 131.

[0040] During the downward pressing process of the lower pressure plate 13, the second lower pressure plate 132 first contacts the wet soil on the sample tray 12. As the pressing pressure increases, the second lower pressure plate 132 will compress the spring 134 upwards, so that the second lower pressure plate 132 will enter the groove 133 below the first lower pressure plate 131. At this time, the first lower pressure plate 131 has not yet contacted the wet soil. The wet soil that the second lower pressure plate 132 contacts and compresses will be dispersed to the periphery of the second lower pressure plate 132 and below the first lower pressure plate 131. Then, as the first lower pressure plate 131 is pressed down, the wet soil will be dispersed to the periphery of the first lower pressure plate 131, ensuring that the soil in the sample tray 12 is more evenly dispersed. When the pressing is stopped after reaching a certain degree, since the cross-section of the groove 133 is the same as the cross-section of the second lower pressure plate 132, the second lower pressure plate 132 just enters the groove 133. At this time, the bottom surface of the first lower pressure plate 131 and the bottom surface of the second lower pressure plate 132 are on the same plane, preventing soil from entering the groove 133. After the soil sheet is pressed, the lower pressing plate 13 begins to rise. At this time, the first lower pressing plate 131 begins to rise first. Due to the elastic force of the spring 134, the second lower pressing plate 132 cannot leave the soil sheet, while the soil sheet at the bottom of the first lower pressing plate 131 will detach. As the lower pressing plate 13 rises, the second lower pressing plate 132 rises. Under the action of gravity, especially the gravity of the soil sheet at the bottom of the first lower pressing plate 131, the soil sheet at the bottom of the second lower pressing plate 132 easily detaches and remains in the sample tray 12. This ensures that the soil sheet quickly detaches from the lower pressing plate 13, ensuring the pressing effect and effectively avoiding soil sample residue.

[0041] As a further technical solution, the sample tray 12 includes a tray bottom 121 and a tray edge 122. A plurality of partition columns 123 are provided on the tray bottom 121, and the height of the partition columns 123 is lower than that of the tray edge 122.

[0042] During the pressing of wet soil samples, the edge 122 effectively prevents wet soil from being squeezed out of the sample pan 12, avoiding soil sample leakage and reducing the number of times the equipment needs to be cleaned. Several separators 123 on the bottom 121 can pass through the wet soil sheet, resulting in several holes on the wet soil sheet. This increases air permeability, which is beneficial for the rapid drying of the soil later. It also makes it easier to crush and break up the dried soil sheet later. Because the separators 123 have a certain height, this can prevent the wet soil sample from being over-compacted, ensuring that the soil sheet is easy to crush later. At the same time, the presence of the separators 123 on the bottom 121 increases the friction between the soil sheet and the sample pan 12, making it easier for the wet soil sheet to detach from the pressing plate 13 and remain on the sample pan 12, ensuring the smooth progress of the pressing operation.

[0043] As a further technical solution, a load-bearing plate 14 is provided below the lower pressure plate 13, and a slide groove 15 is provided on the load-bearing plate 14. The sample tray 12 is placed in the slide groove 15. A sample inlet gate 16 is provided on one side of the slide groove 15, and a sensor 17 is provided on the other side near the position of the flip plate 22. The plurality of flip plates 22 are evenly arranged on the conveyor belt 21.

[0044] The load-bearing plate 14 supports the sample tray 12 and bears the pressure of the lower pressure plate 13. The slide groove 15 on the load-bearing plate 14 is located directly below the lower pressure plate 13, which can ensure that the sample tray 12 is accurately positioned when it is placed in the plate. The wet soil in the sample tray 12 can be pressed into a thin sheet without tilting. In addition, the presence of the slide groove 15 allows the sample tray 12, after being compressed, to be pushed along the slide groove 15 with the sensor 17 when the next sample tray 12 is pushed in through the sample inlet gate 16. It then reaches the corresponding flip plate 22. At the same time, the sensor 17 sends a signal to the conveyor belt 21 to move the flip plate 22 containing the sample tray 12 a certain distance. The next flip plate 22 will also move the same distance, at which point it is flush with the side of the slide groove 15 with the sensor 17. When the next sample tray 12 passes the sensor 17 and reaches the flip plate 22, the movement is repeated. In this way, the compressed wet soil is successfully sent to the drying conveyor mechanism 2, ready for the next drying step.

[0045] As a further technical solution, the flip plate 22 includes a first flip plate 221 and a second flip plate 222. The first flip plate 221 is provided with an inverted U-shaped strip 223, the height of which is greater than that of the sample tray 12. The second flip plate 222 is disposed on the conveyor belt 21, and one end is connected to one end of the first flip plate 221 via a hinge 224. The flip angle between the first flip plate 221 and the second flip plate 222 is no greater than 90°. The conveyor belt 21 is vertically arranged, and the tilt angle of the slide plate 23 is 45° to 75°.

[0046] The compressed wet soil sample tray 12 is pushed through the inverted U-shaped strip 223 on the first flip plate 221 and placed on the first flip plate 221. At this time, the angle between the first flip plate 221 and the second flip plate 222 is 90°, that is, the first flip plate 221 is perpendicular to one side of the conveyor belt 21. The sample tray 12 can be placed relatively stably on the first flip plate 221. During the upward movement of the flip plate 221, the inverted U-shaped strip 223 can prevent the sample tray 12 from tipping over and avoid soil sample loss. If the angle between the first flip plate 221 and the second flip plate 222 is less than 90°, that is, the first flip plate 221 is tilted upward, the inverted U-shaped strip 223 can prevent the sample tray 12 from tipping over due to tilting, and play the role of keeping the sample tray 12 on the first flip plate 221. After the soil sample is air-dried, the conveyor belt 21 starts moving. When the first tilting plate 221 passes the highest point of the conveyor belt 21, it begins to tilt, and the sample tray 12 begins to slide inverted into the lower slide plate 23. Because it is inverted, the air-dried soil sample detaches from the sample tray 12 as it slides down the lower slide plate 23, falling into the compaction mechanism 3 together, essentially achieving complete separation. Furthermore, after passing the highest point of the conveyor belt 21, the tilting plate 221 is now parallel to the conveyor belt 21. This tilting setting not only allows the sample tray 12 and the air-dried soil sample to separate smoothly, but also saves equipment space and prevents any soil sample residue on the tilting plate 221 from falling to the bottom of the equipment, reducing the frequency of equipment cleaning. The vertical arrangement of the conveyor belt 21 saves equipment floor space. The tilt angle of the lower slide plate 23 is 45° to 75°, which allows the sample tray 12 and the air-dried soil sample to slide smoothly into the compaction mechanism 3, with the best sliding effect achieved at a tilt angle of 60°.

[0047] As a further technical solution, the rolling mechanism 3 includes a sample receiving platform 31 and a rolling rod 32, and a rolling groove 33 is provided on the upper part of the sample receiving platform 31.

[0048] The compaction groove 33 on the sample receiving platform 31 is directly below the lower end of the sliding plate 23. The sample tray 12 and the air-dried soil sample will slide into the compaction groove 33 along the sliding plate 23. During the sliding process, the sample tray 12 and the air-dried soil sample are basically separated. At this time, the sample tray 12 is manually picked out, leaving only the air-dried soil sample in the compaction groove 33. Then, the air-dried soil sample is manually compacted with the compaction rod 32. Since the air-dried soil sample is already a thin sheet with holes, only light compaction is needed to achieve rapid soil crushing and good crushing effect.

[0049] As a further technical solution, the bottom of the compaction trough 33 is arc-shaped, the lower end of the compaction rod 32 is provided with a cylindrical rolling wheel 34, a storage cabinet 35 is provided on one side of the sample receiving platform 31, the flipping plate 22 is located in the middle of the conveyor belt 21, and the conveyor belt 21 is provided with guardrails 24 on both sides.

[0050] The rounded bottom of the compaction trough 33 facilitates the crushing of the dried soil flakes. The cylindrical rollers 34 at the lower end of the rolling compaction rod 32 further break the dried soil flakes into smaller soil particles, which is beneficial for subsequent precise grinding. After compaction, the compaction rod 32 can be placed in the storage cabinet 35 for storage, and excess unused sample trays 12 can also be placed there. The baffles 24 on both sides of the conveyor belt 21 ensure that any small amount of soil that may be broken and spilled during the rotation of the first tilting plate 221 falls downwards, preventing it from spilling onto the sides of the conveyor belt 21 and ensuring the overall cleanliness of the equipment.

[0051] As a further technical solution, the outer cabinet 4 includes a first outer cabinet 41 and a second outer cabinet 42. The downward dispersing mechanism 1 and the air drying and transmission mechanism 2 are respectively installed in the first outer cabinet 41 and the second outer cabinet 42. The lower part of one side of the first outer cabinet 41 is connected to the lower part of one side of the second outer cabinet 42 through a sliding door 43. The lower part of the other side of the first outer cabinet 41 is provided with the sample inlet door 16. The upper part of the other side of the second outer cabinet 42 is provided with the sample outlet door 44. The lower part of the second outer cabinet 42 is provided with an air inlet mechanism 5 and an inspection door 6. The top is provided with an air outlet 45. The inspection door 6 is provided with an observation window 7.

[0052] The first outer cabinet 41 and the second outer cabinet 42 divide the outer cabinet 4 into two parts, ensuring that the pressure dispersion mechanism 1 and the air-drying transmission mechanism 2 operate in two separate spaces without interfering with each other. Simultaneously, only when the air-drying transmission mechanism 2 begins temperature-controlled drying should the sliding door 43 be pushed inwards to completely isolate the pressure dispersion mechanism 1 and the air-drying transmission mechanism 2, ensuring that hot or cold air remains only in the air-drying transmission mechanism 2, thus avoiding energy loss. At other times, the sliding door 43 should be pulled outwards to ensure that the sample tray 12 can smoothly enter the air-drying transmission mechanism 2 from the pressure dispersion mechanism 1. When the equipment starts working, the sample tray 12 containing wet soil is pushed into the chute 15 through the sample inlet door 16. After drying, the sample tray 12 and the dried soil sheet are slid out through the sample outlet door 44 via the sliding plate 23. The air inlet mechanism 5 mainly blows hot or cold air into the air-drying transmission mechanism 2 to promote rapid drying of the wet soil sheet, while the air outlet 45 facilitates the evaporation of moisture, resulting in better drying effect. The dryness of the wet soil sheet can be observed through the observation window 7 on the inspection door 6, which allows for adjustment of the drying temperature as needed. It also allows for checking whether the interior of the mechanism needs cleaning or if there is any malfunction. If necessary, the inspection door 6 can be opened for cleaning or maintenance.

[0053] As a further technical solution, a sample quantity standard line 124 is set on the bottom of the pan 121, the pan edge 122 is 4cm to 6cm high, the separator 123 is 1cm to 1.5cm high, the separator 123 is frustum-shaped, the upper bottom surface of the frustum-shaped separator 123 is smaller than the lower bottom surface, and the lower bottom surface is set on the bottom of the pan 121.

[0054] To ensure the appropriate thickness of the compressed soil sheets, facilitating subsequent air drying and crushing, when placing the wet soil onto the sample tray 12, the cross-section of the wet soil should ideally align with the sample volume standard line 124 on the tray bottom 121, and the height should match the height of the tray rim 122, which is 4cm–6cm high. The height of the separator column 123 should be one-third of the height of the tray rim 122. At this height, the compressed sheets are thinner and easier to detach completely from the lower pressure plate 13. The separator column 123 is a frustum-shaped column with an upper base smaller than its lower base. This allows the air-dried soil sheets to detach more easily from the sample tray 12 when the tray is flipped on the first flipping plate 221 and transferred to the lower sliding plate 23, minimizing manual operation, saving time, and improving efficiency.

[0055] As a further technical solution, the upper part of the pressing mechanism 11 is a sliding connecting rod or a hydraulic cylinder, the conveyor belt 21 is driven by a motor, the sensor 17 is connected to the motor, the air inlet mechanism 5 includes a fan and a temperature-regulating heater, and the sensor 17 is a pressure sensor.

[0056] During operation, the pressing mechanism 11 is used to press down and rise using a sliding linkage or hydraulic cylinder. When the sample tray 12 passes the pressure sensor 17, the pressure sensor 17 transmits a signal to the motor. After the motor starts, it drives the conveyor belt 21 to move a certain distance, and the moving speed can be adjusted as needed. The fan can blow air into the second outer cabinet 42, and the wind speed can be adjusted. Whether the incoming air is natural wind or heated air at a certain temperature can be adjusted by regulating the temperature control heater. This setup ensures the normal and efficient operation of the entire equipment, provides excellent pretreatment results for grinding wet soil, significantly saves time, and shortens the entire soil sampling and testing cycle.

[0057] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wet soil grinding pretreatment device, characterized in that, The device includes a pressing and dispersing mechanism (1), an air-drying and conveying mechanism (2), a crushing mechanism (3), and an outer cabinet (4). The pressing and dispersing mechanism (1) includes a pressing mechanism (11) and several sample trays (12). A pressing plate (13) is provided at the lower end of the pressing mechanism (11). The sample trays (12) are located below the pressing plate (13). A conveyor belt (21) is provided on the air-drying and conveying mechanism (2). Several flip plates (22) are provided on the conveyor belt (21). The pressing and dispersing mechanism (1) is provided on one side of the conveyor belt (21), and a sliding plate (23) is provided on the other side. The crushing mechanism (3) is provided at the lower end of the sliding plate (23). The lower pressure plate (13) includes a first lower pressure plate (131) and a second lower pressure plate (132). A groove (133) is provided below the first lower pressure plate (131), and a spring (134) is provided in the groove (133). The second lower pressure plate (132) is connected to the first lower pressure plate (131) through the spring (134). The cross-section of the groove (133) is the same as the cross-section of the second lower pressure plate (132) and smaller than the cross-section of the first lower pressure plate (131). The sample tray (12) includes a tray bottom (121) and a tray edge (122). A plurality of partition columns (123) are provided on the tray bottom (121), and the height of the partition columns (123) is lower than that of the tray edge (122). The flip plate (22) includes a first flip plate (221) and a second flip plate (222). The first flip plate (221) is provided with an inverted U-shaped strip (223), the height of which is greater than that of the sample tray (12). The second flip plate (222) is disposed on the conveyor belt (21), and one end is connected to one end of the first flip plate (221) through a hinge (224). The flip angle between the first flip plate (221) and the second flip plate (222) is not greater than 90°. The conveyor belt (21) is vertically arranged, and the tilt angle of the slide plate (23) is 45° to 75°.

2. A wet soil grinding pretreatment device according to claim 1, wherein a load-bearing plate (14) is provided below the lower pressure plate (13), a chute (15) is provided on the load-bearing plate (14), the sample tray (12) is placed in the chute (15), a sample inlet gate (16) is provided on one side of the chute (15), and a sensor (17) is provided on the other side near the flip plate (22), and the plurality of flip plates (22) are evenly arranged on the conveyor belt (21).

3. The wet soil grinding pretreatment equipment according to claim 2, wherein the compaction mechanism (3) includes a sample receiving platform (31) and a compaction rod (32), and a compaction groove (33) is provided on the upper part of the sample receiving platform (31).

4. According to claim 3, the bottom of the compaction trough (33) is arc-shaped, the lower end of the compaction rod (32) is provided with a cylindrical rolling wheel (34), a storage cabinet (35) is provided on one side of the sample receiving platform (31), the flipping plate (22) is provided in the middle of the conveyor belt (21), and the conveyor belt (21) is provided with guardrails (24) on both sides.

5. A wet soil grinding pretreatment device according to claim 4, wherein the outer cabinet (4) includes a first outer cabinet (41) and a second outer cabinet (42), the pressing and dispersing mechanism (1) and the air drying and conveying mechanism (2) are respectively disposed in the first outer cabinet (41) and the second outer cabinet (42), the lower part of one side of the first outer cabinet (41) is connected to the lower part of one side of the second outer cabinet (42) through a sliding door (43), the lower part of the other side of the first outer cabinet (41) is provided with the sample inlet door (16), the upper part of the other side of the second outer cabinet (42) is provided with the sample outlet door (44), the lower part of the second outer cabinet (42) is provided with an air inlet mechanism (5) and an inspection door (6), the top is provided with an air outlet (45), and the inspection door (6) is provided with an observation window (7).

6. A wet soil grinding pretreatment device according to claim 5, wherein a sample quantity standard line (124) is set on the bottom of the pan (121), the edge of the pan (122) is 4cm to 6cm high, the separator (123) is 1cm to 1.5cm high, the separator (123) is frustum-shaped, the upper bottom surface of the frustum-shaped separator (123) is smaller than the lower bottom surface, and the lower bottom surface is set on the bottom of the pan (121).

7. A wet soil grinding pretreatment device according to claim 6, wherein the upper part of the pressing mechanism (11) is a sliding connecting rod or a hydraulic cylinder, the conveyor belt (21) is driven by a motor, the sensor (17) is connected to the motor, the air inlet mechanism (5) includes a fan and a temperature-regulating heater, and the sensor (17) is a pressure sensor.

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