Integrated device for preparing soil sample with target particle size and target moisture content

Abstract

The invention relates to the technical field of soil sample preparation, in particular to an integrated device for preparing a soil sample with target particle size and target moisture content, which comprises a treatment box and a feed hopper arranged on the upper end surface of the treatment box, a crushing assembly, a first screening assembly, a conveying and drying assembly, a moisture content adjusting assembly, a soil sample conveying belt, a wet soil crushing part, a second screening assembly and a material receiving box are arranged on the inner side of the treatment box. The crushing assembly, the two-stage screening assembly, the conveying and drying assembly, the moisture content adjusting assembly and the wet soil crushing part are integrated in the treatment box, and the central processing unit is introduced for closed-loop control, so that synchronous online regulation and control of double indexes of particle size-moisture content are realized. Compared with the prior art, according to the scheme, the number of manual intervention times and transition waiting time are remarkably reduced, the problem of local overwetting caused by traditional watering can type water distribution is solved, and the problem that wet soil agglomerates to block a screen is solved.

Description

An integrated device for preparing soil samples with target particle size and target moisture content. Technical Field

[0001] This invention belongs to the field of soil sample preparation technology, and particularly relates to an integrated device for preparing soil samples with target particle size and target moisture content. Background Technology

[0002] In fields such as civil engineering, geotechnical engineering, geological engineering, environmental engineering, and agricultural science, soil sample preparation is a fundamental step in conducting various laboratory tests and engineering analyses. Among these, the particle size distribution and moisture content of soil are key parameters characterizing its physical and mechanical properties, directly affecting its compaction, permeability, strength characteristics, and deformation behavior. Therefore, in practical scientific research and engineering applications, it is often necessary to precisely prepare standardized soil samples with target particle size and moisture content according to experimental requirements for subsequent experimental analysis.

[0003] Currently, the process of setting target particle size and target moisture content for soil samples mainly relies on manual operation. This typically involves first crushing and sieving the undisturbed soil, then manually adding water, stirring, and allowing it to stand for curing based on the weighing results to achieve the preset moisture content. However, this process is cumbersome, time-consuming, and highly dependent on the operator's experience. Especially when preparing fine-grained soil or soil samples with a certain initial moisture content, soil particles are prone to agglomeration and adhesion to the screen, resulting in low sieving efficiency and insufficient particle size control accuracy. During moisture content setting, manual water addition and stirring cannot guarantee uniform moisture distribution in the soil, easily causing localized over-wetting or under-wetting, thus affecting the reliability of subsequent test results. Existing soil sample processing equipment often focuses on single functions, such as mechanical sieving or simple humidification, making it difficult to achieve coordinated and precise setting of target particle size and target moisture content. Although some laboratories are equipped with vibrating screens and moisture adjustment devices, the overall process still requires multiple manual transfers, weighings, and operations, which is not only labor-intensive but also prone to introducing human error during repeated operations. Furthermore, manual operation can easily generate dust pollution, which is detrimental to the safety of the experimental environment and the health of the operators.

[0004] Therefore, achieving automation, integration, intelligence, and efficiency in soil sample preparation while ensuring accuracy in particle size classification and moisture content control has become a pressing application technology problem for standardized soil sample preparation and geotechnical testing. To address these shortcomings, a device capable of sieving soil samples to target particle size and simultaneously preparing them to target moisture content has been developed. Through an integrated mechanical structure and automatic control system, continuous processing of soil samples from their initial state to the target state is achieved, reducing manual intervention and improving preparation efficiency and result stability. This device has significant engineering application value and practical significance for improving the standardization level of geotechnical testing, reducing human error, and improving experimental conditions. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide an integrated device for preparing soil samples with target particle size and target moisture content.

[0006] To achieve the above objectives, this invention proposes an integrated device for preparing soil samples with target particle size and target moisture content. The device includes a processing chamber and a feed hopper located on the upper surface of the processing chamber. Inside the processing chamber are a crushing component, a first screening component, a conveying and drying component, a moisture content adjusting component, a soil sample conveyor belt, a wet soil crusher, a second screening component, and a receiving box. The crushing component is located below the feed hopper. The first screening component is located to one side of the crushing component. The conveying and drying component is connected below the crushing component. The moisture content adjusting component is located to one side of the conveying and drying component. The soil sample conveyor belt is located to one side of the moisture content adjusting component. The wet soil crusher is located to one side of the soil sample conveyor belt and below the conveying and drying component. The second screening component is located to one side of the wet soil crusher. The receiving box is located below the second screening component. The second screening component has the same structure as the first screening component. The second screening component is used to screen the soil crushed by the wet soil crusher. The surface of the second screening component should be coated with an anti-stick coating.

[0007] Preferably, the crushing assembly includes a support frame disposed inside the processing box, a fixed frame disposed on the upper end surface of the support frame, two crushing wheels rotatably disposed inside the fixed frame, the two crushing wheels are placed in parallel, a drive motor is disposed on the fixed frame, and the output end of the drive motor is connected to the crushing wheels.

[0008] Preferably, the first screening component includes multiple sets of guide rails disposed inside the processing box. The multiple sets of guide rails are located on one side of the fixed frame. Each set of guide rails has two rails, and the two rails are respectively connected to two walls inside the processing box. A screen is slidably connected between the two rails. A vibration motor is disposed at one end of each rail. An opening is provided on the rail. A vibrating wire is connected to the vibration motor. The vibrating wire passes through the opening and is connected to the screen. The multiple sets of guide rails move along equal trajectories, and the end point of the movement is located below the fixed frame. The screen aperture size on each set of guide rails is different.

[0009] Preferably, the conveying and drying assembly includes a conveying pipe connected to the lower end face of the fixed frame. The conveying pipe has a cross-section that is wider at the top and narrower at the bottom. A fixed cylinder is provided at the end of the conveying pipe away from the fixed frame. The fixed cylinder is inclined downward. A drying drum is rotatably arranged inside the fixed cylinder. A toothed ring is provided at one end of the drying drum. Multiple air inlets are sequentially opened on the drying drum. Multiple sets of flip plates are rotatably arranged on the inner side wall of the drying drum. The multiple sets of flip plates correspond to the positions of multiple sets of air inlets. Each set of flip plates has two flip plates, and the two flip plates are rotatably connected to both sides of the air inlet.

[0010] Preferably, the upper end face of the fixed cylinder is provided with a mounting base, the upper end face of the mounting base is provided with multiple fans, one end of the mounting base is rotatably provided with a transmission gear, the mounting base is provided with a driver, the output end of the driver is connected to the transmission gear, the transmission gear meshes with a gear ring, and the mounting base is provided with a heater, the positions of the heater and the fans correspond to each other.

[0011] Preferably, the moisture content adjustment component includes a soil box disposed inside the processing chamber, the soil box being located below the drying drum, an outlet being provided at one end of the soil box, a baffle being provided at the outlet via a limiting slider, toothed plates being provided on both sides of the side wall opposite to the baffle and the soil box, a rotating shaft being rotatably connected to the lower end face of the soil box, a starter motor being provided on the lower end face of the soil box, the starter motor being connected to the rotating shaft via a synchronous belt, drive teeth being provided at both ends of the rotating shaft, the two drive teeth respectively meshing with the two toothed plates, a servo motor being provided above the soil box, the output end of the servo motor being connected to a water sprayer via an electric telescopic rod, the water sprayer having multiple water spray arms arranged in a circumferential array, and a water spray head being provided on the lower end face of the water spray arms.

[0012] Preferably, a push plate is provided on the inner side of the soil tank, and an expansion joint is provided on one side wall of the soil tank. The output end of the expansion joint extends to the inner side of the soil tank and connects with the push plate. A connecting shaft is provided on the lower end face of the water sprayer, and multiple spiral blades are provided on the connecting shaft.

[0013] Preferably, the soil sample conveyor belt is provided with multiple limiting plates at equal intervals, the receiving box is located inside the support frame, and the wet soil crushing component includes a crushing box located inside the processing box and inside the support frame. The crushing box is located below one end of the soil sample conveyor belt. A feed inlet is opened on one side of the upper end face of the crushing box, and the feed inlet corresponds to one end of the soil sample conveyor belt. A discharge outlet is opened on the lower end face of the crushing box, and the discharge outlet corresponds to the receiving box.

[0014] Preferably, a soil-removing gear and a crushing gear are rotatably arranged inside the crushing box, with the soil-removing gear located above the crushing gear.

[0015] Preferably, a central processing unit is provided on the inner wall of the processing box, and a moisture sensor is provided on the central processing unit. The moisture sensor is connected to the moisture content adjustment component and the receiving box. A gravity sensor is provided on the central processing unit and is connected to the receiving box and the moisture content adjustment component.

[0016] This invention proposes an integrated device for preparing soil samples with target particle size and target moisture content, which offers the following advantages: By integrating a crushing component, a two-stage screening component, a conveying and drying component, a moisture content adjustment component, and a wet soil crushing component within the processing chamber, and introducing closed-loop control via a central processor, simultaneous online control of both particle size and moisture content is achieved. Compared to existing technologies, this solution significantly reduces the number of manual interventions and transfer waiting times, eliminates the localized over-wetting problem caused by traditional spray bottle-type water distribution, and solves the problem of wet soil agglomeration clogging the screen. While improving experimental efficiency, it ensures the consistency and repeatability of the soil sample's physical state, providing samples with a higher level of standardization for subsequent geotechnical tests. Attached Figure Description

[0017] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0018] In the accompanying drawings: Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a first sectional view of the present invention; Figure 3 is a second sectional view of the present invention; Figure 4 is a perspective view of the crushing component of the present invention; Figure 5 is a perspective view of the first screening component of the present invention; Figure 6 is a perspective view of the conveying and drying component of the present invention; Figure 7 is a perspective view of the fixed cylinder of the present invention; Figure 8 is a perspective view of the soil sample conveyor belt of the present invention; Figure 9 is a perspective view of the moisture content adjustment component of the present invention; Figure 10 is a perspective view of the connection between the servo motor and the water sprayer of the present invention; Figure 11 is a perspective view of the wet soil crushing component of the present invention; Figure 12 is a perspective view of the central processing unit of the present invention.

[0019] In the diagram: 1. Processing box; 2. Feed hopper; 3. Crushing assembly; 31. Support frame; 32. Fixing frame; 33. Crushing wheel; 4. First screening assembly; 41. Vibrating motor; 42. Guide rail; 43. Screen; 44. Vibrating wire; 45. Opening; 5. Conveying and drying assembly; 51. Conveying pipe; 52. Fixing cylinder; 53. Drying drum; 54. Gear ring; 55. Tilting plate; 56. Mounting base; 57. Fan; 58. Transmission gear; 6. Moisture content adjustment assembly; 61. Soil tank; 62. 63. Baffle; 64. Toothed plate; 65. Drive gear; 66. Servo motor; 67. Water sprayer; 68. Water spray arm; 69. Water spray head; 60. Spiral blade; 610. Push plate; 611. Expansion joint; 7. Soil sample conveyor belt; 71. Limiting plate; 82. Wet soil crushing component; 83. Crushing box; 84. Soil-pulling gear; 85. Crushing gear; 86. Feed inlet; 87. Discharge outlet; 9. Second screening component; 10. Receiving box; 11. Central processing unit; 12. Moisture sensor; 13. Gravity sensor. Detailed Implementation

[0020] To more clearly illustrate the overall concept of the present invention, a detailed description will be provided below with reference to the accompanying drawings and examples.

[0021] As shown in Figures 1-12, an embodiment of the present invention proposes an integrated device for preparing soil samples with target particle size and target moisture content. The device includes a processing chamber 1 and a feed hopper 2 disposed on the upper surface of the processing chamber 1. Inside the processing chamber 1 are a crushing assembly 3, a first screening assembly 4, a conveying and drying assembly 5, a moisture content adjusting assembly 6, a soil sample conveyor belt 7, a wet soil crushing component 8, a second screening assembly 9, and a receiving box 10. The crushing assembly 3 is located below the feed hopper 2, the first screening assembly 4 is located to one side of the crushing assembly 3, and the conveying and drying assembly 5 is connected to the crushing assembly. Below 3, the moisture content adjustment component 6 is located on one side of the conveying and drying component 5, the soil sample conveying belt 7 is located on one side of the moisture content adjustment component 6, the wet soil crusher 8 is located on one side of the soil sample conveying belt 7 and below the conveying and drying component 5, the second screening component 9 is located on one side of the wet soil crusher 8, and the receiving box 10 is located below the second screening component 9. The second screening component 9 has the same structure as the first screening component 4. The second screening component 9 is used to screen the soil crushed by the wet soil crusher 8. The surface of the second screening component 9 should be coated with an anti-stick coating.

[0022] The crushing assembly 3 includes a support frame 31 disposed inside the processing box 1. A fixing frame 32 is disposed on the upper end surface of the support frame 31. Two crushing wheels 33 are rotatably disposed inside the fixing frame 32. The two crushing wheels 33 are placed in parallel. A drive motor is disposed on the fixing frame 32. The output end of the drive motor is connected to the crushing wheels 33.

[0023] The roller crushing wheel 33 inside the fixed frame 32 crushes large pieces of soil in one go, reducing the impact load on the subsequent screen 43, reducing the deformation of the screen surface caused by coarse particles directly entering the fine screen, and extending the service life of the screen 43.

[0024] The first screening component 4 includes multiple sets of guide rails 42 disposed inside the processing box 1. The multiple sets of guide rails 42 are located on one side of the fixed frame 32. Each set of guide rails 42 has two rails, and the two rails 42 are respectively connected to the two inner walls of the processing box 1. A screen 43 is slidably connected between the two rails 42. A vibration motor 41 is disposed at one end of each rail 42. An opening 45 is provided on the rail 42. A vibrating steel wire 44 is connected to the vibration motor 41. The vibrating steel wire 44 passes through the opening 45 and is connected to the screen 43. The multiple sets of guide rails 42 move along the same trajectory, and the end point of the movement is located below the fixed frame 32. The screen 43 on each set of guide rails 42 has a different aperture size.

[0025] It should be noted that the screens 43 of different diameters on the multiple sets of guide rails 42 can be slid to the bottom of the fixed frame 32 to screen the broken soil. When setting up and using the equipment, the screen 43 of the appropriate diameter should be slid to the bottom of the fixed frame 32 according to the requirements.

[0026] The guide rail 42 works in conjunction with the vibrating screen wire 44 to allow the screen 43 to slide at high frequency and in small amplitude within the sealed box, confining the dust within the processing box 1 and improving the experimental environment; multiple sets of screens 43 with different apertures can be quickly switched, allowing the target particle size to be changed without moving the entire machine, thus improving the versatility of a single device.

[0027] The conveying and drying assembly 5 includes a conveying pipe 51 connected to the lower end face of the fixed frame 32. The conveying pipe 51 has a cross-section that is wider at the top and narrower at the bottom. A fixed cylinder 52 is provided at the end of the conveying pipe 51 away from the fixed frame 32. The fixed cylinder 52 is inclined downward. A drying drum 53 is rotatably arranged inside the fixed cylinder 52. A toothed ring 54 is provided at one end of the drying drum 53. Multiple air inlets are sequentially opened on the drying drum 53. Multiple sets of flip plates 55 are rotatably arranged on the inner side wall of the drying drum 53. The multiple sets of flip plates 55 correspond to the positions of multiple sets of air inlets. Each set of flip plates 55 has two flip plates, and the two flip plates 55 are rotatably connected to both sides of the air inlet.

[0028] The upper end face of the fixed cylinder 52 is provided with a mounting base 56, and the upper end face of the mounting base 56 is provided with a plurality of fans 57. One end of the mounting base 56 is rotatably provided with a transmission gear 58. The mounting base 56 is provided with a driver, and the output end of the driver is connected to the transmission gear 58. The transmission gear 58 meshes with the gear ring 54. The mounting base 56 is provided with a heater, and the positions of the heater and the fans 57 correspond to each other.

[0029] It should be noted that the heater is a commonly used heating resistance wire. Due to the conventional methods used for heating resistance wire, this solution will not describe its working principle in detail. For specific principles, please refer to existing technologies.

[0030] The rotating plate 55 on the inner wall of the drying drum 53 automatically opens and closes the air inlet as it rotates, forming an alternating contact mode of "hot air-particles": the particles are fully heated when they are lifted up, and the air inlet closes when they fall to prevent fly ash, which improves the drying uniformity and prevents fine powder from escaping; the inclined drum body discharges materials by gravity, eliminating the need for an additional conveying mechanism.

[0031] The moisture content adjustment component 6 includes a soil tank 61 located inside the processing tank 1, below the drying drum 53. One end of the soil tank 61 has an outlet, and a baffle 62 is slidably mounted at the outlet via a limiting slider. Toothed plates 63 are mounted on both sides of the side wall opposite to the baffle 62 and the soil tank 61. A rotating shaft is rotatably connected to the lower end of the soil tank 61, and a starter motor is mounted on the lower end of the soil tank 61. The starter motor is connected to the rotating shaft via a synchronous belt, and drive teeth 64 are mounted at both ends of the rotating shaft. The two drive teeth 64 mesh with the two toothed plates 63 respectively. A servo motor 65 is mounted above the soil tank 61, and the output end of the servo motor 65 is connected to a water sprayer 66 via an electric telescopic rod. Multiple water spray arms 67 are arranged in a circular array on the water sprayer 66, and a water spray head 68 is mounted on the lower end of each water spray arm 67.

[0032] A push plate 610 is provided on the inner side of the soil tank 61, and an expansion joint 611 is provided on one side wall of the soil tank 61. The output end of the expansion joint 611 extends to the inner side of the soil tank 61 and connects with the push plate 610. A connecting shaft is provided on the lower end face of the water sprayer 66, and multiple spiral blades 69 are provided on the connecting shaft.

[0033] Moisture sensor 12 monitors the humidity distribution in soil tank 61 in real time. The central processing unit 11 dynamically adjusts the start and stop of water sprayer 66 based on this, and works with electric telescopic rod to raise and lower spiral blade 69 to achieve a cycle of "shallow water layer - deep stirring - re-detection" to eliminate local mud cores. Push plate 610 is linked with baffle 62, toothed plate 63 and drive tooth 64 to automatically open valve to discharge material in a closed state, avoiding dust caused by manual opening of the cover.

[0034] Multiple limiting plates 71 are evenly spaced on the soil sample conveyor belt 7. The receiving box 10 is located inside the support frame 31. The wet soil crushing component 8 includes a crushing box 81 located inside the processing box 1 and inside the support frame 31. The crushing box 81 is located below one end of the soil sample conveyor belt 7. A feed inlet 84 is opened on one side of the upper end face of the crushing box 81. The feed inlet 84 corresponds to one end of the soil sample conveyor belt 7. A discharge outlet 85 is opened on the lower end face of the crushing box 81. The discharge outlet 85 corresponds to the position of the receiving box 10.

[0035] The crushing box 81 is rotatably equipped with a soil-removing gear 82 and a crushing gear 83, with the soil-removing gear 82 located above the crushing gear 83.

[0036] The crushing box 81 is equipped with a drive motor, and the output end of the drive motor is connected to the soil-removing gear 82 and the crushing gear 83 respectively.

[0037] The equidistant limiting plate 71 cuts the wet soil into equal segments, which not only prevents material from sticking to the belt, but also provides a uniform feeding rhythm for the subsequent wet soil crushing component 8, reducing the jamming of the soil-pulling gear 82. The soil-pulling gear 82 first loosens the clumps, and the crushing gear 83 then shears and refines them. The difference in speed between the two stages forms a "loosening-shearing" progressive effect, which not only protects the blade teeth, but also makes the wet soil particles quickly become single particles, reducing the probability of the second screening component 9 clogging the screen.

[0038] A central processing unit 11 is provided on the inner wall of the processing box 1. A moisture sensor 12 is provided on the central processing unit 11. The moisture sensor 12 is connected to the moisture content adjustment component 6 and the receiving box 10. A gravity sensor 13 is provided on the central processing unit 11. The gravity sensor 13 is connected to the receiving box 10 and the moisture content adjustment component 6.

[0039] Moisture sensors 12 are respectively installed at the bottom of the soil tank 61 and the bottom of the receiving box 10; gravity sensors 13 are used to monitor the quality of soil samples inside the receiving box 10 and the soil tank 61. After obtaining the soil sample quality, gravity sensors 13 upload the data to the central processing unit 11 for centralized analysis and processing of soil sample quality data.

[0040] By using dual-channel feedback from moisture sensor 12 and gravity sensor 13, the "drying-water distribution-regradation" process is connected in series as a closed-loop control. The operator only needs to input the target particle size and moisture content, and the device will automatically complete the entire process, significantly reducing the reliance on operator experience.

[0041] Working principle: The dry soil of the crushing component 3 falls into the fixed frame 32 through the feed hopper 2. The drive motor drives the two parallel crushing wheels 33 to crush the large pieces of soil into loose particles, reducing the load of subsequent screening.

[0042] The first screening component 4 crushes particles and falls laterally along the fixed frame 32 into the screen 43 on the multi-layer guide rail 42; the vibrating motor 41 drives the screen 43 to reciprocate along the guide rail 42 with high frequency micro-amplitude vibration through the vibrating screen wire 44, and particles with a diameter smaller than the mesh size pass through layer by layer to complete the dry primary classification; the coarse particles that have not passed through the screen remain in the upper layer to avoid directly entering the subsequent process and to ensure the primary particle size accuracy.

[0043] After being graded by the conveying and drying assembly 5, the fine particles slide down the inclined fixed cylinder 52 through the conveying pipe 51, which is wider at the top and narrower at the bottom. The driver drives the transmission gear 58 to rotate, which meshes with the toothed ring 54 on the outer wall of the drying drum 53, causing the drying drum 53 to rotate at a low speed. The fan 57 blows the hot air generated by the heater into the drum through the air inlet. When the tilting plate 55 rotates to the upper inner side of the drying drum 53, the tilting plate 55 flips down under the action of gravity. At this time, the air inlet is in the open state, and the hot air is blown into the drum through the air inlet. When it rotates to the lower inner side of the drying drum 53, the tilting plate 55 flips down under the action of gravity to close the air inlet. The soil inside the drying drum 53 will not be lost, the particles are in full contact with the hot air, and the surface free water gradually evaporates.

[0044] After the dried particles from the moisture content adjustment component 6 fall into the soil tank 61, the moisture sensor 12 immediately collects the substrate humidity, and the gravity sensor 13 records the net weight in real time and uploads it to the central processor 11. The central processor 11 automatically calculates the required amount of water replenishment based on the target moisture content. The servo motor 65 drives the water sprayer 66 to rotate, and the spray heads 68 under the multiple spray arms 67 form an annular atomization zone. At the same time, the connecting shaft drives the spiral blade 69 to axially tumble the particles, and the moisture is evenly coated on the surface of the particles. When the moisture sensor 12 detects that the moisture content of the mixture has reached the target range, the water spraying and stirring stop synchronously. The electric telescopic rod moves the spiral blade 69 upward, and the motor starts to drive the drive gear 64 to rotate. The drive gear 64 drives the baffle 62 to move downward and opens the outlet. Then, the telescopic device 611 drives the push plate 610 to push the soil inside the soil tank 61 to the soil sample conveyor belt 7.

[0045] The soil sample conveyor belt 7 and the limiting plate 71 quantitatively separate the wet soil that has reached the moisture content standard but is still in a loose state, and convey it to the wet soil crusher 8 end with the belt to avoid material slippage and accumulation.

[0046] The wet soil crusher 8: The wet soil falls into the crushing box 81 from the feed inlet 84. It is first pre-dispersed by the soil-removing gear 82, and then sheared a second time by the crushing gear 83 to break the particles that are agglomerated due to water content back into single particles, ensuring that the subsequent screening will not clog the holes.

[0047] The second screening component 9 has the same structure as the first screening component 4. It vibrates and classifies the wet soil again, so that the particle size and moisture content meet the target requirements at the same time. The qualified particles fall into the receiving box 10. The gravity sensor 13 and the moisture sensor 12 record the net weight and humidity throughout the process, which can be directly used by the tester. The surface of the second screening component 9 should be coated with an anti-stick coating to prevent wet soil particles from sticking to the screen.

[0048] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0049] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. An integrated device for preparing soil samples with target particle size and target moisture content, characterized in that, The system includes a processing box (1) and a feed hopper (2) located on the upper surface of the processing box (1). Inside the processing box (1) are a crushing assembly (3), a first screening assembly (4), a conveying and drying assembly (5), a moisture content adjustment assembly (6), a soil sample conveyor belt (7), a wet soil crushing component (8), a second screening assembly (9), and a receiving box (10). The crushing assembly (3) is located below the feed hopper (2), the first screening assembly (4) is located on one side of the crushing assembly (3), the conveying and drying assembly (5) is connected below the crushing assembly (3), and the moisture content adjustment assembly (6) is located on the conveying and drying assembly (7). On one side of the drying assembly (5), the soil sample conveyor belt (7) is located on one side of the moisture content adjustment assembly (6), the wet soil crusher (8) is located on one side of the soil sample conveyor belt (7) and below the conveying drying assembly (5), the second screening assembly (9) is located on one side of the wet soil crusher (8), the receiving box (10) is located below the second screening assembly (9), the second screening assembly (9) has the same structure as the first screening assembly (4), the second screening assembly (9) is used to screen the soil crushed by the wet soil crusher (8), and the surface of the second screening assembly (9) should be coated with an anti-stick coating.

2. The integrated device for preparing soil samples with target particle size and target moisture content according to claim 1, characterized in that, The crushing component (3) includes a support frame (31) disposed inside the processing box (1). A fixed frame (32) is provided on the upper surface of the support frame (31). Two crushing wheels (33) are rotatably disposed inside the fixed frame (32). The two crushing wheels (33) are placed in parallel. A drive motor is provided on the fixed frame (32). The output end of the drive motor is connected to the crushing wheel (33).

3. The integrated device for preparing soil samples with target particle size and target moisture content according to claim 2, characterized in that, The first screening component (4) includes multiple sets of guide rails (42) arranged inside the processing box (1). The multiple sets of guide rails (42) are located on one side of the fixed frame (32). Each set of guide rails (42) has two rails. The two rails (42) are respectively connected to the two walls inside the processing box (1). A screen (43) is slidably connected between the two rails (42). A vibration motor (41) is provided at one end of the guide rail (42). An opening (45) is provided on the guide rail (42). A vibrating screen wire (44) is connected to the vibrating motor (41). The vibrating screen wire (44) passes through the opening (45) and is connected to the screen (43). The multiple sets of guide rails (42) move along the same trajectory, and the end point of the movement is located below the fixed frame (32). The screen (43) on each set of guide rails (42) has a different aperture size.

4. The integrated device for preparing soil samples with target particle size and target moisture content according to claim 2, characterized in that, The conveying and drying assembly (5) includes a conveying pipe (51) connected to the lower end face of the fixed frame (32). The conveying pipe (51) has a cross-section that is wider at the top and narrower at the bottom. A fixed cylinder (52) is provided at one end of the conveying pipe (51) away from the fixed frame (32). The fixed cylinder (52) is inclined downward. A drying drum (53) is rotatably arranged inside the fixed cylinder (52). A toothed ring (54) is provided at one end of the drying drum (53). Multiple air inlets are sequentially opened on the drying drum (53). Multiple sets of flip plates (55) are rotatably arranged on the inner side wall of the drying drum (53). The multiple sets of flip plates (55) correspond to the positions of multiple sets of air inlets. Each set of flip plates (55) has two flip plates, and the two flip plates (55) are rotatably connected to both sides of the air inlet.

5. The integrated device for preparing soil samples with target particle size and target moisture content according to claim 4, characterized in that, The upper end face of the fixed cylinder (52) is provided with a mounting base (56), and the upper end face of the mounting base (56) is provided with multiple fans (57). One end of the mounting base (56) is rotatably provided with a transmission gear (58). The mounting base (56) is provided with a driver, and the output end of the driver is connected to the transmission gear (58). The transmission gear (58) meshes with the gear ring (54). The mounting base (56) is provided with a heater, and the positions of the heater and the fans (57) correspond to each other.

6. The integrated device for preparing soil samples with target particle size and target moisture content according to claim 4, characterized in that, The moisture content adjustment component (6) includes a soil box (61) disposed inside the processing box (1). The soil box (61) is located below the drying drum (53). One end of the soil box (61) is provided with an outlet. A baffle (62) is provided at the outlet and is slidably disposed by a limiting slider. Toothed plates (63) are provided on both sides of the side wall of the baffle (62) opposite to the soil box (61). A rotating shaft is rotatably connected to the lower end face of the soil box (61). The lower end face of the soil box (61) is provided with... There is a starter motor, which is connected to the rotating shaft via a synchronous belt. The rotating shaft has drive teeth (64) at both ends. The two drive teeth (64) mesh with two tooth plates (63) respectively. A servo motor (65) is provided above the soil box (61). The output end of the servo motor (65) is connected to a water sprayer (66) via an electric telescopic rod. Multiple water spray arms (67) are arranged in a circular array on the water sprayer (66). A water spray head (68) is provided on the lower end face of the water spray arm (67).

7. The integrated device for preparing soil samples with target particle size and target moisture content according to claim 6, characterized in that, The soil tank (61) is provided with a push plate (610) on its inner side. A telescopic device (611) is provided on one side wall of the soil tank (61). The output end of the telescopic device (611) extends to the inner side of the soil tank (61) and connects with the push plate (610). A connecting shaft is provided on the lower end face of the water sprayer (66). Multiple spiral blades (69) are provided on the connecting shaft.

8. The integrated device for preparing soil samples with target particle size and target moisture content according to claim 2, characterized in that, Multiple limiting plates (71) are evenly spaced on the soil sample conveyor belt (7). The receiving box (10) is located inside the support frame (31). The wet soil crushing component (8) includes a crushing box (81) located inside the processing box (1) and inside the support frame (31). The crushing box (81) is located below one end of the soil sample conveyor belt (7). A feed inlet (84) is opened on one side of the upper end face of the crushing box (81). The feed inlet (84) corresponds to one end of the soil sample conveyor belt (7). A discharge port (85) is opened on the lower end face of the crushing box (81). The discharge port (85) corresponds to the position of the receiving box (10).

9. The integrated device for preparing soil samples with target particle size and target moisture content according to claim 8, characterized in that, The crushing box (81) is rotatably equipped with a soil-removing gear (82) and a crushing gear (83), with the soil-removing gear (82) located above the crushing gear (83).

10. The integrated device for preparing soil samples with target particle size and target moisture content according to claim 1, characterized in that, The processing box (1) is equipped with a central processing unit (11) on its inner wall. A moisture sensor (12) is installed on the central processing unit (11). The moisture sensor (12) is connected to the moisture content adjustment component (6) and the receiving box (10). A gravity sensor (13) is installed on the central processing unit (11). The gravity sensor (13) is connected to the receiving box (10) and the moisture content adjustment component (6).

Images