Gobi soil soil homogenization and screening device

Abstract

The application discloses a kind of gobi soil soil homogenization screening devices, to solve gobi soil particle gradation discrete, the problem of low screening efficiency and poor adaptability of traditional equipment caused by variable soil quality. Including vehicle body, feeding conveyor, detection device, first conveyor belt, rotatable screening cylinder, second and third conveyor belt and control system. When working, detection device real-time obtains soil particle size and gradation information, control system rotates screening cylinder to matched screening area position according to instruction, and adjusts the speed of first conveyor belt to cooperate screening. Screening cylinder is inclinedly arranged, its outer periphery is provided with open-bottom blocking cylinder, and the inside is provided with blocking plate and partition plate, which cooperates with vibration motor to prevent material blockage and mixing. Different particle size materials after screening are respectively output to the outside of vehicle body by second and third conveyor belts, which is convenient for subsequent homogenization mixing operation. The application realizes intelligent, efficient and continuous screening of soil, which significantly improves the automation level and separation precision of gobi soil treatment.

Description

Technical Field

[0001] This invention generally relates to the field of soil treatment machinery, and specifically to a soil homogenization and screening device for Gobi soil. Background Technology

[0002] my country's Gobi Desert region is vast, and Gobi soil is a major roadbed filler and backfill material used in large quantities and readily available for infrastructure construction such as railways, highways, airports, and municipal stations, holding an irreplaceable position in engineering construction. However, Gobi soil differs fundamentally from ordinary soils such as conventional clay, silt, and sand. Its most prominent characteristics are extremely poor soil stability, highly dispersed particle size distribution, and no fixed natural mix ratio, directly restricting engineering quality and construction efficiency.

[0003] The core problem with Gobi soil lies in its extremely dispersed particle size distribution and lack of a stable gradation pattern. The Gobi region is vast and geologically complex; the ratio of coarse to fine particles varies significantly across different locations, borrow pits, and even different depths within the same borrow pit. The particle composition exhibits strong randomness and large fluctuations, making it impossible to form a stable, uniform natural gradation. This highly heterogeneous and unstable characteristic makes it difficult to standardize the mixing and quality control of Gobi soil according to fixed proportions during on-site filling, compaction, and improvement.

[0004] Existing soil mixing equipment and homogenization technologies are designed for ordinary soils with relatively stable gradation and homogeneous composition, or for improved soils with fixed mix proportions. They are ill-suited to the naturally occurring characteristics of Gobi soils, such as their dispersed gradation and variable soil properties. Traditional mixing devices have fixed screening structures and operating parameters, failing to optimize for the random fluctuations in particle size distribution and irregular ratios of coarse and fine particles in Gobi soils. This makes them unsuitable for the variable screening and mixing environment of Gobi soils. Such fixed-mode equipment cannot adapt to real-time changes in soil conditions when processing Gobi soils, making it difficult to guarantee the homogeneity of the mixed materials and the stability of the engineering filling quality. Furthermore, it cannot meet the actual needs of continuous construction projects in Gobi regions. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present invention provides a Gobi soil homogenization and screening device, comprising: a vehicle body, which is a closed light-shielding structure, with a feed inlet on one side of the vehicle body; a feed conveyor belt passing through the feed inlet of the vehicle body; a detection device disposed below the material drop end of the feed conveyor belt, including an industrial surface vibratory camera, a laser profile sensor, and a light source, for real-time acquisition of particle size and gradation distribution information of the dropped soil material; a primary conveyor belt located inside the vehicle body and arranged along the length of the vehicle body for receiving the soil material dropped from the feed conveyor belt; and a screening cylinder, which is inclined and rotatably mounted. Inside the vehicle body, rotating around its own central axis, and fitted around the outside of the primary conveyor belt, the screening cylinder has multiple strip-shaped screening zones arranged along its length, each with a different screening hole diameter; the secondary conveyor belt is located below the screening cylinder and is used to transport undersize material; the tertiary conveyor belt is located at the discharge port at the bottom of the screening cylinder and is used to transport oversize material; the control system is electrically connected to the detection device and the screening cylinder drive mechanism, and is used to control the rotation of the screening cylinder to the screening zone position matching the current soil type according to the gradation distribution information, and to control the speed of the primary conveyor belt to match the screening process.

[0006] With the aforementioned technical features, the enclosed, light-shielding vehicle structure provides a stable optical environment for the detection device, effectively avoiding external light interference and ensuring the accuracy of the detection data. The detection device utilizes a combination of an industrial surface vibratory camera, a laser profile sensor, and a light source to acquire real-time information on the particle size and gradation distribution of soil material falling from the feed end, providing a data foundation for subsequent intelligent sorting. Based on the gradation information fed back by the detection device, the control system intelligently controls the rotation of the screening cylinder to the screening zone position matching the current soil type and adjusts the speed of the primary conveyor belt. This dynamic matching mechanism allows the device to automatically adjust the screening strategy according to the characteristics of different soils, greatly improving screening efficiency and sorting accuracy. The inclined and rotatable screening cylinder, combined with screening zones of different apertures, achieves efficient soil screening; the secondary and tertiary conveyor belts respectively divert and transport the undersize and oversize materials, achieving orderly material processing and solving the problems of poor adaptability and low efficiency of traditional screening equipment.

[0007] In some embodiments, a baffle cylinder is fitted around the outer periphery of the screening cylinder. The screening cylinder and the baffle cylinder are coaxially arranged and can rotate relative to the baffle cylinder. The bottom of the baffle cylinder is open, so that when the screening cylinder rotates, the screening area currently at the bottom is exposed above the primary conveyor belt. Thus, this structure completely surrounds the periphery of the screening cylinder except for the bottom using the baffle cylinder, effectively preventing soil materials from randomly scattering or splashing from non-working areas during the rotation of the screening cylinder, ensuring the cleanliness of the equipment interior and the controllability of material flow. When the screening cylinder rotates relative to the baffle cylinder under the action of the drive mechanism, only the screening area currently at the bottom is exposed above the primary conveyor belt. This design allows the control system to precisely select screening areas of specific aperture sizes to align with the material flow, achieving on-demand opening and closing of screening, avoiding confusion between screening areas of different particle sizes, and ensuring the orderliness and targeting of the screening process.

[0008] In some embodiments, a support frame is fixedly installed inside the vehicle body, and the baffle cylinder is elastically connected to the support frame via multiple flexible springs. The two ends of each flexible spring are fixedly connected to the outer walls of the support frame and the baffle cylinder, respectively. Thus, by installing a support frame inside the vehicle body and using multiple flexible springs to elastically connect the baffle cylinder to the support frame, a triple benefit of support, vibration isolation, and efficiency improvement is achieved. First, the flexible springs provide a stable and elastic support force for the baffle cylinder, ensuring its structural stability in a suspended state. Second, this elastic connection structure creates a highly efficient vibration isolation zone, effectively blocking the transmission of mechanical vibrations generated during the operation of the screening cylinder to the vehicle body and the overall frame, greatly protecting precision detection devices such as industrial surface vibration cameras and laser contour sensors installed on the vehicle body, and preventing inaccurate detection data or component damage due to continuous vibration. More importantly, the flexible springs endow the baffle cylinder and screening cylinder system with specific elastic dynamic characteristics, allowing the screening cylinder to generate beneficial high-frequency micro-amplitude vibrations using the elastic potential energy of the springs when rotating and screening sticky and wet materials such as Gobi soil. This additional vibrational energy can effectively disrupt the surface tension and agglomeration effect between soil particles, significantly reducing material blockage and adhesion at the sieve openings, thereby greatly improving the soil's sieve penetration rate and overall sieve efficiency.

[0009] In some embodiments, the baffle cylinder is equipped with a drive mechanism that drives the screening cylinder to rotate coaxially with the baffle cylinder. The drive mechanism includes a drive motor fixedly mounted on the outer wall of the baffle cylinder; a gear coaxially fixed to the output shaft of the drive motor; and an annular rack coaxially fixed to the outer wall of the screening cylinder and meshing with the gear. Thus, by employing a drive mechanism consisting of a drive motor, a gear, and an annular rack, smooth relative rotation between the screening cylinder and the baffle cylinder is achieved. Specifically, the drive motor fixed to the outer wall of the baffle cylinder serves as a power source, driving the gear to rotate via its output shaft. The rotational power is efficiently and directly transmitted to the screening cylinder through the meshing of the gear and the annular rack on the outer wall of the screening cylinder. This gear and rack transmission method not only provides a constant transmission ratio and smooth operation, ensuring that the screening cylinder rotates precisely to the target screening section position according to the control system's instructions, but also features a compact structure, strong load-bearing capacity, and effectively avoids slippage that may occur with traditional friction drives, thereby significantly improving the positioning accuracy and overall operational reliability of the screening operation.

[0010] In some embodiments, the inner wall of the screening cylinder is provided with multiple annular baffles spaced along its length. This effectively solves the problem of material sliding too quickly due to the inclined design of the screening cylinder. Specifically, because the screening cylinder is inclined, soil material easily slides rapidly down the cylinder wall under gravity, resulting in a short residence time inside the cylinder and insufficient screening. The baffles are equivalent to creating multiple physical barriers along the material's falling path, significantly increasing the resistance to the material's downward movement and forcing the material to remain in the screening cylinder for a longer time.

[0011] In some embodiments, a vibrating motor is fixed to the top of the baffle cylinder. Thus, by fixing a vibrating motor to the top of the baffle cylinder, a highly efficient and concentrated vibration source is provided for the entire screening system. Since the baffle cylinder is elastically connected to the vehicle support frame via a flexible spring, the excitation force generated by the vibrating motor during operation can drive the baffle cylinder and the coaxially sleeved screening cylinder to produce synchronous high-frequency vibration. This vibration not only helps to fully loosen and tumble the material inside the screening cylinder, effectively preventing sticky and wet materials such as Gobi soil from clogging or hardening at the screen holes; but also, thanks to the elastic isolation effect of the spring, the vibration energy is highly confined to the internal working system composed of the baffle cylinder and the screening cylinder, greatly reducing the transmission to the vehicle body and the overall machine frame.

[0012] In some embodiments, a fan is provided on one side of the material discharge end of the feed conveyor belt, the fan being connected to the internal and external environments of the vehicle body. An air inlet is provided on the other side of the vehicle body. The fan is used to extract dust generated on the primary conveyor belt from the vehicle body. Thus, under the suction of the fan, a stable negative pressure airflow field is formed inside the vehicle body, especially in the primary conveyor belt area. This rapidly captures and extracts the large amount of dust generated during material transfer, descent, and screening, effectively preventing dust spillage and pollution of the working environment, and protecting the occupational health of operators. Simultaneously, because the vehicle body is a closed, light-shielding structure, this dust removal structure maintains the cleanliness of the internal optical detection environment while achieving powerful dust removal, preventing dust from adhering to camera lenses or sensors and causing a decrease in detection accuracy. This ensures the accuracy and stability of soil particle size and gradation distribution information acquisition.

[0013] In some embodiments, the primary conveyor belt is inclined, and its inclination causes some soil material to tend to slide towards the lower end under gravity. The tertiary conveyor belt is located directly above the lowest end of the primary conveyor belt and is used to catch the soil material rolling off the primary conveyor belt. Thus, the inclined arrangement of the primary conveyor belt causes some of the larger or heavier soil material to tend to slide and roll towards the lower end under the influence of gravity, thereby initially separating it from the majority of the material still being conveyed normally. The tertiary conveyor belt, located directly above the lowest end of the primary conveyor belt, can accurately catch this material that naturally rolls off due to gravity. This design cleverly utilizes the physical properties of gravity to pre-collect and transport some coarse or heavy materials, not only reducing the instantaneous processing load on the subsequent screening cylinder but also optimizing the distribution and flow of materials, ensuring a smooth and efficient screening process.

[0014] In some embodiments, the baffle plate has multiple flow holes. Thus, the main function of the baffle plate is to slow the downward flow of material within the inclined cylinder, while the flow holes break down the physical barrier of the baffle plate, providing a smooth passage for fine particles. This design effectively prevents localized material accumulation, blockage, or poor discharge caused by an excessively large baffle plate surface area, ensuring that soil particles meeting the required particle size can pass through the baffle plate in a timely manner and fall into the next stage collection device. Simultaneously, the presence of the flow holes further optimizes the airflow and material flow field inside the cylinder, significantly improving the overall material throughput and operational continuity of the equipment while retaining the advantages of the baffle plate in extending material residence time and improving screening efficiency.

[0015] In some embodiments, partition plates are provided on both sides of the inner wall of the screening cylinder along the length of the screening cylinder in each screening zone. These partition plates axially divide the inner cavity of the screening cylinder into several independent screening channels that do not interfere with each other, effectively preventing lateral flow and mixing of soil materials during the rotation or vibration of the screening cylinder. This design ensures that each screening zone can operate independently according to a preset aperture or function, greatly improving the purity of material sorting and the accuracy of gradation detection. Furthermore, the partition plates also guide and constrain the flow trajectory of materials within the cylinder, further optimizing the residence and tumbling state of materials in specific screening zones in conjunction with the baffle plates, thereby ensuring the orderliness and efficiency of the overall screening process.

[0016] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0017] Figure 1 This diagram illustrates the overall structure of a Gobi soil homogenization and sieving device according to an embodiment of the present invention.

[0018] Figure 2 A schematic diagram of the internal structure of a Gobi soil homogenization and sieving device according to an embodiment of the present invention is shown.

[0019] Figure 3 A schematic diagram of the structure of a sieving cylinder for a Gobi soil homogenization and sieving device according to an embodiment of the present invention is shown.

[0020] Figure 4 A schematic diagram of the internal structure of the screening cylinder of a Gobi soil homogenization and screening device according to an embodiment of the present invention is shown.

[0021] Symbol Explanation

[0022] 1. Vehicle body; 11. Feed inlet; 12. Feed conveyor belt; 13. Primary conveyor belt; 14. Secondary conveyor belt; 15. Tertiary conveyor belt; 16. Air inlet; 2. Detection device; 21. Industrial surface vibratory camera; 22. Laser profile sensor; 23. Light source; 3. Screening cylinder; 31. Screening zone; 32. Material blocking plate; 321. Flow hole; 33. Separator plate; 4. Material blocking cylinder; 41. Support frame; 42. Flexible spring; 43. Vibration motor; 5. Drive mechanism; 51. Drive motor; 52. Gear; 53. Ring rack; 6. Fan. Detailed Implementation

[0023] The preferred embodiments (or implementation methods) of the present invention will now be described in detail with reference to the accompanying drawings.

[0024] The following is for reference. Figures 1-4 This invention describes a soil homogenization and sieving device for Gobi soil.

[0025] Figure 1 A schematic diagram of the overall structure of a Gobi soil homogenization and sieving device according to an embodiment of the present invention is shown. Figure 2 A schematic diagram of the internal structure of a Gobi soil homogenization and sieving device according to an embodiment of the present invention is shown. (Reference) Figure 1 and Figure 2 As shown, the Gobi soil homogenization and screening device disclosed in this embodiment includes a vehicle body 1, a feeding conveyor belt 12, a detection device 2, a primary conveyor belt 13, a screening cylinder 3, a secondary conveyor belt 14, a tertiary conveyor belt 15, and a control system. The vehicle body 1 is designed as a closed, light-shielding structure, with a feeding port 11 on one side. The feeding conveyor belt 12 passes through the feeding port 11 of the vehicle body 1 for the initial input of materials. The detection device 2 is installed below the material drop end of the feeding conveyor belt 12 and consists of an industrial surface vibratory camera 21, a laser profile sensor 22, and a light source 23. The primary conveyor belt 13 is arranged along the length of the vehicle body 1 inside the vehicle body 1 to collect the soil dropped from the feeding conveyor belt 12. The screening cylinder 3 is installed inclined and rotatably inside the vehicle body 1, fitted over the primary conveyor belt 13, and has multiple strip-shaped screening areas 31 with different apertures distributed along its length. The secondary conveyor belt 14 is located below the screening cylinder 3 and is used to transport the undersize material, while the tertiary conveyor belt 15 is located at the discharge port at the lower end of the screening cylinder 3 and is used to transport the oversize material. The control system is electrically connected to the detection device 2 and the drive mechanism 5 of the screening cylinder 3 to coordinate the operation of the entire equipment.

[0026] The vehicle body 1, as a closed, light-shielding structure, primarily functions to isolate external ambient light interference, providing a stable environment for internal optical detection. The feed conveyor belt 12 extends into the vehicle body 1 through the feed inlet 11, delivering external materials. The industrial surface vibratory camera 21 and laser profile sensor 22, along with the light source 23, in the detection device 2, can capture and acquire real-time information on the particle size and gradation distribution of soil materials during their fall. The primary conveyor belt 13, acting as a connecting component, receives materials from the feed end and transports them horizontally. The screening cylinder 3 rotates around its central axis; its inclined design causes materials to tend to move towards the lower end under gravity. Different screening zones 31 on its periphery correspond to different particle size screening requirements. The secondary conveyor belt 14 collects fine materials that pass through the screening holes, while the tertiary conveyor belt 15 collects larger materials that fail to pass through the screening holes and are discharged from the lower end.

[0027] Based on the real-time feedback of soil particle size and gradation information from the detection device 2, the control system automatically controls the rotation of the screening cylinder 3, adjusting it to the screening zone 31 position that matches the current soil characteristics. This dynamic matching mechanism ensures that soil particles of different sizes can be separated through the most suitable sieve openings, avoiding the problems of low screening efficiency or inaccurate sorting caused by traditional fixed screens. Simultaneously, the control system coordinates the rotation speed of the primary conveyor belt 13 with the screening process of the screening cylinder 3, ensuring the continuity of material transport while avoiding insufficient screening or blockage caused by excessively fast feeding, thus achieving efficient and precise homogenized screening of Gobi soil.

[0028] Although the detection device 2 detects the soil material in real time as it is conveyed by the feed conveyor belt 12, it is still unable to accurately obtain the gradation distribution information of the soil material due to the limited material quantity. Therefore, it is necessary to slow down the operation speed of the primary conveyor belt 13 and extend the conveying path of the primary conveyor belt 13 to allow time for the detection data of the detection device 2, while not affecting the normal conveying of the soil material.

[0029] Figure 3 A schematic diagram of the sieving cylinder 3 of a Gobi soil homogenization and sieving device according to an embodiment of the present invention is shown. (Reference) Figure 3 As shown, a baffle cylinder 4 is sleeved on the outer periphery of the screening cylinder 3. The screening cylinder 3 and the baffle cylinder 4 are coaxially arranged, and the screening cylinder 3 can rotate relative to the baffle cylinder 4. The bottom of the baffle cylinder 4 is open so that when the screening cylinder 3 rotates, the screening area 31 currently located at the bottom is exposed above the primary conveyor belt 13.

[0030] The baffle cylinder 4 is a protective limiting structure used in conjunction with the screening cylinder 3. It is cylindrical in shape and covers the outside of the screening cylinder 3. It is coaxially assembled with the screening cylinder 3 and does not rotate synchronously with the screening cylinder 3. It can form a barrier structure on the outside of the screening cylinder 3. The baffle cylinder 4 is open only at the bottom. The other side walls can cover the upper and side screening areas 31 of the screening cylinder 3. Only the bottom working area is reserved so that when the screening cylinder 3 rotates to switch between different screening areas 31, only the screening area 31 corresponding to the bottom can be connected to the material drop position of the primary conveyor belt 13, while the other screening areas 31 are in a closed and blocked state.

[0031] By setting up coaxially rotating baffle cylinder 4 and screening cylinder 3, flexible switching of screening zones and directional guidance of materials are achieved. The open design at the bottom of baffle cylinder 4, combined with the rotation of screening cylinder 3, ensures that only the currently selected screening zone 31 is directly facing the primary conveyor belt 13 below, allowing soil materials to accurately fall into that zone for screening. This structure not only effectively prevents materials from scattering from non-working areas during the rotation of screening cylinder 3, avoiding mixing of materials from different screening stages, but also ensures the relative stability of the external structure of screening cylinder 3 when adjusting the aperture position, thereby improving the overall reliability of the device operation and the orderly nature of the screening process.

[0032] In some embodiments, the baffle cylinder 4 on the outer periphery of the screening cylinder 3 is connected to the fixed support frame 41 inside the vehicle body 1 by a plurality of flexible springs 42. The two ends of these flexible springs 42 are respectively fixed to the outer wall of the support frame 41 and the baffle cylinder 4 to form an elastic connection structure.

[0033] The support frame 41 is a load-bearing installation structure fixed inside the vehicle body 1, mainly used to provide installation points and support foundations for the baffle cylinder 4 and the corresponding elastic connecting parts. The flexible spring 42 is an elastic buffer connecting component. Multiple sets of flexible springs 42 are evenly arranged between the support frame 41 and the baffle cylinder 4, so that the baffle cylinder 4 is assembled under the support frame 41 by elastic suspension. The overall structure can maintain the installation stability of the baffle cylinder 4 while having a certain amount of elastic movement.

[0034] The structure of using flexible springs 42 to elastically connect the baffle cylinder 4 to the support frame 41 provides the baffle cylinder 4 with a certain buffering and shock absorption capacity, enabling it to adapt to slight vibrations during equipment operation. Simultaneously, the multiple sets of springs working together in a fixed installation method maintain the overall structural stability of the baffle cylinder 4, reducing the impact of equipment vibration on the assembly position of the baffle cylinder 4. This helps ensure the stability of the relative position between the baffle cylinder 4 and the screening cylinder 3, facilitating smooth screening operations.

[0035] In some embodiments, a vibration motor 43 is fixedly installed at the top of the baffle cylinder 4. The vibration motor 43 is an external power vibration component, which is fixedly assembled at the top of the baffle cylinder 4 and remains relatively fixed with the baffle cylinder 4 as a whole. It can serve as a vibration source to provide vibration power to the baffle cylinder 4, and together with the flexible spring 42 structure between the baffle cylinder 4 and the support frame 41, it forms an overall vibration cooperation structure.

[0036] A vibration motor 43 is installed at the top of the baffle cylinder 4, which can provide continuous vibration to the baffle cylinder 4. Combined with the elastic characteristics of the flexible spring 42, the baffle cylinder 4 can generate moderate vibration during operation. This structure can reduce the accumulation of soil material on the inner wall of the baffle cylinder 4, facilitate the smooth falling of material to participate in the screening operation, and help maintain the continuous and stable operation of the equipment.

[0037] In some embodiments, the baffle cylinder 4 is equipped with a drive mechanism 5 for driving the screening cylinder 3 to rotate coaxially relative to the baffle cylinder 4. The drive mechanism 5 includes a drive motor 51, a gear 52, and an annular rack 53. The drive motor 51 is fixedly installed on the outer wall of the baffle cylinder 4, the gear 52 is coaxially fixedly connected to the output shaft of the drive motor 51, and the annular rack 53 is coaxially fixedly connected to the outer wall of the screening cylinder 3. The annular rack 53 and the gear 52 mesh with each other.

[0038] The drive mechanism 5 is a power transmission structure that drives the screening cylinder 3 to rotate and switch screening areas. The entire assembly is completed based on the baffle cylinder 4. Among them, the drive motor 51 is the power output component of the whole mechanism. It is fixedly installed on the outer wall of the baffle cylinder 4 and provides rotational power. The gear 52 is an intermediate transmission component that rotates synchronously with the output shaft of the drive motor 51. The ring rack 53 is a ring transmission component that is fixed to the outer wall of the screening cylinder 3. Through the transmission method of meshing with the gear 52, it transmits the power of the drive motor 51 to the screening cylinder 3, thereby realizing the coaxial rotation of the screening cylinder 3 relative to the baffle cylinder 4.

[0039] By integrating the drive mechanism 5 on the outside of the baffle cylinder 4, the installation space of the baffle cylinder 4 can be fully utilized, facilitating the overall integration of the structure. The meshing transmission method of gear 52 and ring rack 53 ensures stable power transmission, enabling the screening cylinder 3 to smoothly complete rotational adjustment. This allows the equipment to switch between corresponding screening zones 31 according to soil conditions, adapting to the differentiated screening operation requirements of the equipment.

[0040] Figure 4 A schematic diagram of the internal structure of the screening cylinder 3 of a Gobi soil homogenization and screening device according to an embodiment of the present invention is shown. (Reference) Figure 4 As shown, multiple annular baffle plates 32 are spaced apart along the length of the inner wall of the screening cylinder 3. The baffle plates 32 are annular limiting and stopping components, with multiple baffle plates 32 fixed at intervals to the inner wall of the screening cylinder 3 and evenly distributed along its length. The screening cylinder 3 only rotates coaxially when changing screening specifications or adjusting the position of the screening zone 31. After position adjustment, it maintains a fixed angle and no longer rotates. During operation, the screening cylinder 3 vibrates together with the baffle cylinder 4, and the baffle plates 32 vibrate synchronously with the screening cylinder 3. Together with the screening space inside the cylinder, they form a material limiting structure, which slows down the sliding speed of the material inside the cylinder, prolongs the residence time of the material in the vibrating screening area, allows the material to fully participate in the screening operation, and avoids the problem of insufficient screening caused by rapid material slippage, effectively optimizing the overall screening effect of the equipment.

[0041] In some embodiments, the baffle plate 32 is provided with multiple flow holes 321. The multiple flow holes 321 on the baffle plate 32 can slow down and retain the material while ensuring normal forward flow of the soil material, preventing material accumulation and blockage caused by complete obstruction of the baffle plate 32. Combined with the vibration operation of the equipment, this can extend the material screening time while ensuring continuous material conveying, balancing screening effect and operational smoothness.

[0042] In some embodiments, the inner wall of the screening cylinder 3 is provided with partition plates 33 on both sides of each screening zone 31 along the length of the screening cylinder 3. By providing partition plates 33 on both sides of each screening zone 31, the internal space of the screening cylinder 3 can be divided into zones, which can prevent material mixing in different screening zones 31 to a certain extent. Combined with the vibration operation mode of the screening cylinder 3, it helps to ensure that the material completes the screening process stably in the corresponding screening zone 31, which is conducive to maintaining the screening state of materials of different particle sizes and helps to improve the regularity of the screening operation.

[0043] refer to Figure 2 As shown, a fan 6 is installed on one side of the material discharge end of the feed conveyor belt 12. The fan 6 connects the internal environment of the vehicle body 1 with the external environment. An air inlet 16 is installed on the other side of the vehicle body 1. The fan 6 can extract the dust generated on the primary conveyor belt 13 to the outside of the vehicle body 1. The fan 6 is a dust removal and ventilation component inside the vehicle body 1, located on the side of the material discharge end of the feed conveyor belt 12, and runs through the vehicle body 1 to achieve air circulation between the inside and outside. The air inlet 16 is a ventilation structure on the other side of the vehicle body 1, allowing external air to enter the interior of the vehicle body 1 and form a convection channel with the fan 6. When the equipment is operating, the dust generated inside the vehicle body 1 can be discharged by the airflow through the fan 6. The entire structure is fixed inside the vehicle body 1 and operates synchronously with the whole machine.

[0044] By setting air inlets 16 and fans 6 on both sides of the vehicle body 1, a continuous convective airflow can be formed inside the vehicle body 1, which can remove the dust generated during the operation of the primary conveyor belt 13, reducing the accumulation and diffusion of dust inside the vehicle body 1. This structure can improve the working environment inside the enclosed vehicle body 1, reduce the adverse effects of dust on the sensing and identification of the detection device 2 and the screening operation, and ensure the continuous and stable operation of the equipment.

[0045] refer to Figure 2 As shown, the primary conveyor belt 13 is arranged at an angle, and the angle of the primary conveyor belt 13 allows some soil material to slide towards the lower end under the action of gravity. The tertiary conveyor belt 15 is arranged directly above the lowest end of the primary conveyor belt 13 and can catch the soil material rolling off the primary conveyor belt 13.

[0046] The primary conveyor belt 13 is an inclined material conveying structure that uses its own inclination angle to provide gravity sliding conditions for the material to be conveyed forward. The tertiary conveyor belt 15 is a receiving and conveying structure for the oversize material. It is installed above the material drop position at the lowest end of the primary conveyor belt 13 and works in conjunction with the primary conveyor belt 13 to collect large particles of soil material that slide off the end of the primary conveyor belt 13, thus realizing the directional receiving and conveying of the material.

[0047] By tilting the primary conveyor belt 13, gravity can be used to assist the soil material in moving forward, facilitating the discharge of large particles from the end of the primary conveyor belt 13. By setting the tertiary conveyor belt 15 at the corresponding position, the material falling off the screen can be caught in time, realizing the diversion and conveying of materials of different particle sizes. This reduces the accumulation of large particles in the screening area and facilitates the orderly conduct of screening operations.

[0048] Working process: Gobi soil material is conveyed from the feed conveyor belt 12 through the feed inlet 11 of the vehicle body 1 to the enclosed and light-proof vehicle body 1. When the material falls from the drop end of the feed conveyor belt 12, the detection device 2 below the drop end, in conjunction with the industrial surface vibrating camera 21, the laser profile sensor 22 and the light source 23, collects the particle size and gradation distribution information of the soil material in real time. At the same time, the fan 6 on one side of the vehicle body 1, in conjunction with the air inlet 16, forms a convective airflow to extract the dust generated in the area of ​​the primary conveyor belt 13 out of the vehicle body 1, maintaining a clean detection and screening environment. After receiving the gradation distribution information from the detection device 2, the control system controls the primary conveyor belt 13 to reduce its conveying speed, extending the material conveying and detection matching time. This allows the detection device 2 to obtain more comprehensive soil gradation data, providing a reliable basis for adjusting the screening parameters. Subsequently, based on the matched gradation information, the control system sends a command to the drive mechanism 5. The drive motor 51, through the meshing of gear 52 and ring rack 53, drives the screening cylinder 3 to rotate around its central axis, rotating the screening zone 31, which is compatible with the current soil type, to the open position at the bottom of the baffle cylinder 4, thus completing the adjustment of the screening aperture. After the screening cylinder 3 is fixed in position, the vibration motor 43 starts, and with the elastic support of the flexible spring 42, drives the baffle cylinder 4 and the screening cylinder 3 to vibrate synchronously at high frequency. The primary conveyor belt 13 slowly conveys the received soil material into the screening cylinder 3. The baffle plate 32 on the inner wall of the screening cylinder 3 cooperates with the flow hole 321 to slow down the material's downward speed and extend the screening residence time. The partition plate 33 prevents the material from flowing between different screening zones 31. The undersize material that meets the aperture requirements falls through the sieve holes onto the secondary conveyor belt 14. Large particles that do not pass through the sieve holes slide down the inclined primary conveyor belt 13 and are received by the tertiary conveyor belt 15. The screened material is continuously transported to the outside of the vehicle body 1 via the secondary conveyor belt 14 and the tertiary conveyor belt 15, forming a material product with clear particle size classification. This facilitates the subsequent homogenization and mixing operations carried out by the staff according to the engineering mix ratio, ensuring that the Gobi soil filler has a uniform gradation and meets the requirements of the project.

[0049] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A soil homogenization and sieving device for Gobi soil, characterized in that, include: The vehicle body (1) is a closed light-shielding structure, and a feed inlet (11) is provided on one side of the vehicle body (1); Feed conveyor belt (12) passes through the feed inlet (11) of the vehicle body (1); The detection device (2) is located below the material drop end of the feed conveyor belt (12) and includes an industrial surface vibrating camera (21), a laser profile sensor (22), and a light source (23) for real-time acquisition of particle size and gradation distribution information of the dropped soil material. The primary conveyor belt (13) is located inside the vehicle body (1) and is laid out along the length of the vehicle body (1) to receive soil materials falling from the receiving conveyor belt (12); The screening cylinder (3) is installed in the vehicle body (1) at an incline and can be rotated. It rotates around its own central axis and is sleeved on the outside of the primary conveyor belt (13). Multiple strip-shaped screening areas (31) are arranged on the periphery of the screening cylinder (3) along its length direction. The screening hole diameter of each screening area (31) is different. A secondary conveyor belt (14) is located below the screening cylinder (3) and is used to transport undersize material. The three-stage conveyor belt (15) is set at the low end of the discharge port of the screening cylinder (3) for conveying the material on the screen. The control system is electrically connected to the detection device (2) and the drive mechanism (5) of the screening cylinder (3), and is used to control the screening cylinder (3) to rotate to the screening section position that matches the current soil quality according to the gradation distribution information, and to control the rotation speed of the primary conveyor belt (13) to match the screening process.

2. The Gobi soil homogenization and sieving device according to claim 1, characterized in that, The outer periphery of the screening cylinder (3) is fitted with a baffle cylinder (4). The screening cylinder (3) is coaxially arranged with the baffle cylinder (4) and can rotate relative to the baffle cylinder (4). The bottom of the baffle cylinder (4) is open so that when the screening cylinder (3) rotates, the screening area (31) currently located at the bottom is exposed above the primary conveyor belt (13).

3. The Gobi soil homogenization and sieving device according to claim 2, characterized in that, A support frame (41) is fixedly installed inside the vehicle body (1). The baffle cylinder (4) is elastically connected to the support frame (41) by multiple flexible springs (42). The two ends of the flexible spring (42) are fixedly connected to the outer walls of the support frame (41) and the baffle cylinder (4), respectively.

4. The Gobi soil homogenization and sieving device according to claim 3, characterized in that, The baffle cylinder (4) is equipped with a drive mechanism (5) that drives the screening cylinder (3) to rotate coaxially with the baffle cylinder (4). The drive mechanism (5) includes... A drive motor (51) is fixedly installed on the outer wall of the baffle cylinder (4); The gear (52) is coaxially fixed to the output shaft of the drive motor (51); The annular rack (53) is coaxially fixed to the outer wall of the sieve cylinder (3) and meshes with the gear (52).

5. The Gobi soil homogenization and sieving device according to claim 4, characterized in that, The inner wall of the screening cylinder (3) is provided with a plurality of annular material blocking plates (32) at intervals along its length.

6. A Gobi soil homogenization and sieving device according to claim 4 or 5, characterized in that, A vibration motor (43) is fixed to the top of the baffle cylinder (4).

7. The Gobi soil homogenization and sieving device according to claim 1, characterized in that, A fan (6) is provided on one side of the material discharge end of the feed conveyor belt (12). The fan (6) connects the vehicle body (1) to the internal and external environment. An air inlet (16) is provided on the other side of the vehicle body (1). The fan (6) is used to extract the dust generated on the primary conveyor belt (13) from the vehicle body (1).

8. The Gobi soil homogenization and sieving device according to claim 1, characterized in that, The primary conveyor belt (13) is inclined, and its inclination direction causes some soil material to tend to slide towards the lower end under the action of gravity. The third-level conveyor belt (15) is located directly above the lowest end of the first-level conveyor belt (13) and is used to receive soil materials rolling off the first-level conveyor belt (13).

9. A soil homogenization and sieving device for Gobi soil according to claim 5, characterized in that, The material blocking plate (32) has multiple flow holes (321).

10. A soil homogenization and sieving device for Gobi soil according to claim 1, characterized in that, The inner wall of the sieve cylinder (3) is provided with partition plates (33) on both sides of each sieve zone (31) along the length of the sieve cylinder (3).

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