A slag soil screening and improving pump paving integrated device for farmland construction and a use method thereof

Abstract

This invention relates to the field of waste soil reuse technology, specifically an integrated equipment and method for screening, improving, pumping, and paving waste soil in farmland construction. It includes a screening system comprising a multi-layer vibrating screen, a collection trough, and a screening system drive motor; a crushing system comprising a rotating shaft, a blade assembly mounted on the rotating shaft, and a crushing system drive motor; a mixing system comprising a mixing shaft, mixing blades, and a mixing system drive motor; and a storage system comprising a main material silo, which internally includes a first material silo for receiving waste soil from the collection trough, a third material silo for receiving organic additives from the crushing system, and a second material silo for receiving mixtures from the mixing system. The system is connected in series with an intelligent control system via a conveying pipeline, integrating traditionally dispersed and multi-stage processes into a single automated production line. This reduces multiple material handling and frequent equipment changes, improves construction efficiency, and lowers labor costs and operational complexity.

Description

Technical Field

[0001] This invention relates to the field of waste soil reuse technology, and in particular to an integrated equipment and method for screening, improving, pumping and laying waste soil in farmland construction. Background Technology

[0002] The construction of high-standard farmland is a crucial foundational project for ensuring national food security, imposing stringent requirements on soil quality, fertility uniformity, and ecological environment. However, existing arable land resources are scarce, and the supply of high-quality soil is insufficient, necessitating stable and efficient soil sources and improvement technologies. Simultaneously, the large quantities of construction waste generated in urban areas, primarily composed of sand, clay, and other minerals, can be effectively separated and improved, serving as a potential supplementary resource for farmland soil, achieving synergy between the resource utilization of construction waste and farmland soil improvement.

[0003] Currently, the disposal of construction waste and the improvement of farmland soil are usually separate processes. On the one hand, existing waste treatment equipment (such as screening machines and crushers) has limited functionality, only capable of preliminary crushing or screening, lacking the ability to further improve and directly apply the materials. On the other hand, farmland soil improvement and paving largely rely on traditional agricultural machinery and manual labor, resulting in problems such as imprecise proportions, uneven mixing, low paving efficiency, and difficulty in controlling the thickness. Existing technologies lack continuous and intelligent equipment that integrates waste screening, organic additive crushing, soil mixing and improvement, and precise paving functions, leading to low utilization rates of waste resources, unstable soil quality, high costs for high-standard farmland construction, and limited efficiency. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention is proposed.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an integrated equipment and method for screening, improving and pumping farmland construction waste, which includes a screening system, including a multi-layer vibrating screen, a collection tank and a screening system drive motor; The crushing system includes a rotating shaft, a blade assembly mounted on the rotating shaft, and a crushing system drive motor; The mixing system includes a mixing shaft, mixing blades, and a mixing system drive motor; The storage system includes a main material warehouse, which contains a first material warehouse for receiving slag from the collection tank, a third material warehouse for receiving organic additives from the crushing system, and a second material warehouse for receiving mixtures from the mixing system. Both the first and third material warehouses are connected to the feed inlet of the mixing system. The pump-laying system includes a high-pressure pump, nozzles, and pump-laying pipes connecting the second material bin to the high-pressure pump; The control system includes a central processing unit and actuator modules that are electrically connected to the drive motors of the screening system, the crushing system, the mixing system, and the high-pressure pump, respectively.

[0006] As a preferred embodiment of the integrated equipment for screening, improving, pumping and laying of slag in farmland construction as described in this invention, the multi-layer vibrating screen includes a first layer of screen, a second layer of screen, a third layer of screen and a fourth layer of screen arranged from top to bottom, and the screen hole size of each layer of screen decreases from top to bottom, and a collection trough is provided between adjacent layers of screen.

[0007] As a preferred embodiment of the integrated equipment for screening, improving, pumping and laying of slag in farmland construction as described in this invention, the blade assembly includes long strip blades, serrated blades and arc blades with complementary structures.

[0008] As a preferred embodiment of the integrated equipment for screening, improving, pumping and laying of slag in farmland construction as described in this invention, the first material silo is divided into multiple parallel sub-silos, and each sub-silo is used to receive and store slag of a specific particle size from different collection troughs.

[0009] As a preferred embodiment of the integrated equipment for screening, improving, pumping, and paving slag in farmland construction according to the present invention, wherein: the outer wall of the collection tank is connected to a first conveying pipe and is connected to the first material bin; the discharge port of the crushing system is connected to a third conveying pipe and is connected to the third material bin; the discharge port of the mixing system is connected to a second conveying pipe and is connected to the second material bin; the first material bin and the third material bin are respectively connected to the inlet of the mixing system through a fourth conveying pipe and a fifth conveying pipe.

[0010] As a preferred embodiment of the integrated equipment for screening, improving, pumping, and paving slag in farmland construction according to the present invention, wherein: the inlet end of the pumping pipeline is connected to the first material bin, the second material bin, and the third material bin respectively; the conveying end of the pumping pipeline is connected to the high-pressure pump; and the outlet end of the high-pressure pump is connected to the nozzle.

[0011] As a preferred embodiment of the integrated equipment for screening, improving, pumping, and paving slag in farmland construction according to the present invention, the pumping system further includes a flow regulating valve installed on the pumping pipeline, and the control end of the flow regulating valve is electrically connected to the control system.

[0012] As a preferred embodiment of the integrated equipment for screening, improving, pumping, and paving slag in farmland construction according to the present invention, the pumping system further includes a pressure sensor for monitoring material pressure and a flow sensor for monitoring material flow rate, both of which are connected to the control system.

[0013] As a preferred embodiment of the integrated equipment for screening, improving, pumping and laying of slag in farmland construction as described in this invention, the control system further includes a human-machine interface for parameter setting and status display, and the human-machine interface is signal-connected to the central processing unit.

[0014] A preferred embodiment of the integrated equipment and method for screening, improving, pumping, and laying slag in farmland construction, comprising the following steps: S1. Equipment Debugging: Check that the connections of the screening system, crushing system, mixing system, storage system, pumping system, control system and other related devices are normal; turn on the power and debug the device, test the vibration of the multi-layer vibrating screen, the rotation of the rotating shaft and mixing shaft, the sealing of the first conveying pipe, the second conveying pipe, the third conveying pipe, the pumping pipe, the fourth conveying pipe and the fifth conveying pipe, and the spraying of the nozzle, and make corresponding adjustments according to the test results.

[0015] S2. Slag Screening: The slag to be processed is placed on the first layer of the multi-layer vibrating screen. The drive motor of the screening system is started, and the output frequency of the drive motor is adjusted by the control system so that the multi-layer vibrating screen operates at a suitable vibration frequency and amplitude. The slag vibrates on the multi-layer vibrating screen, and slag of different particle sizes passes through the screen in sequence and falls into the corresponding collection trough, completing the slag screening process. The slag of different particle sizes is then stored in the corresponding sub-bins of the first material bin through the conveying pipeline.

[0016] S3. Additive crushing: Organic additives such as straw and green manure crops are put into the crushing system, the crushing system drive motor is started, and the organic additives are crushed to 1cm to 4cm. After crushing, they are stored in the third material bin through the conveying pipeline.

[0017] S4. Mixing and stirring: The slag from the first material bin and the organic additives from the third material bin are respectively transported to the stirring system through the conveying pipe; the driving motor of the stirring system is started, and the stirring shaft drives the stirring blades to rotate, so as to fully stir the organic additives and slag until the organic additives and slag are evenly mixed, and then stored in the second material bin through the conveying pipe.

[0018] S5. Improved Slag Laying: Start the high-pressure pump to transport the improved slag through the pump-laying pipeline to the nozzle; adjust the nozzle's spray angle according to the laying thickness through the control system; adjust the nozzle's spray direction according to the laying area through the control system, and adjust the material flow rate through the flow regulating valve to ensure that the material flow rate delivered to the laying area meets the standard; simultaneously, monitor the pressure in the pump-laying pipeline through the pressure sensor to complete the slag laying.

[0019] The beneficial effects of this invention are as follows: This application integrates traditionally dispersed and multi-stage processes into a single automated production line by connecting a conveying pipeline and an intelligent control system. This reduces multiple material handling and frequent equipment changes, significantly improving construction efficiency and reducing labor costs and operational complexity. Simultaneously, a multi-layer vibrating screen is used to finely classify the slag and soil, effectively separating usable soil components; combined blades are used to specifically crush organic additives, and then controlled stirring achieves precise proportioning and uniform mixing of the two.

[0020] Intelligent sensing and closed-loop control ensure operational quality and operability. The equipment relies on pressure and flow sensors to monitor key parameters in real time, and the central processor automatically adjusts the vibration frequency, blade speed, mixing time, mixing ratio, pump flow rate and nozzle angle through the actuator. This ensures the consistency of screening efficiency, crushing particle size, mixing uniformity and laying thickness. The human-machine interface allows for convenient setting of process parameters, lowers the technical threshold for operation, and ensures the standardization and reliability of large-scale construction. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of an integrated equipment for screening, improving, pumping and laying slag in farmland construction according to the present invention. Figure 2 This is a schematic diagram of the elongated blade in this invention; Figure 3 This is a schematic diagram of the serrated blade in this invention; Figure 4 This is a schematic diagram of the arc-shaped blade in this invention.

[0023] Reference numerals: 1. Screening system; 7. Multi-layer vibrating screen; 32. First layer screen; 33. Second layer screen; 34. Third layer screen; 35. Fourth layer screen; 8. Collection trough; 9. Screening system drive motor; 2. Crushing system; 10. Rotating shaft; 11. Blade assembly; 13. Long strip blade; 14. Serrated blade; 15. Arc blade; 12. Crushing system drive motor; 3. Stirring system; 16. Stirring shaft; 17. Stirring blades; 18. Stirring system drive motor; 4. Storage system; 19. Main material warehouse; 20. First material warehouse; 21. Second material warehouse; 22. Third material warehouse; 5. Pump-laying system; 23. High-pressure pump; 24. Nozzle; 104. First conveying pipeline; 204. Second conveying pipeline; 304. Third conveying pipeline; 504. Fourth conveying pipeline; 604. Fifth conveying pipeline; 404. Pump-laying pipeline; 6. Control system; 29. ​​Sensor module; 25. Pressure sensor; 26. Flow sensor; 27. Flow regulating valve; 28. Central processing unit; 30. Actuation module; 31. Human-machine interface. Detailed Implementation

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments. Example 1

[0027] Reference Figure 1 This is the first embodiment of the present invention, which provides an integrated equipment and method for screening, improving and pumping farmland construction waste.

[0028] Specifically, the screening system 1 includes a multi-layer vibrating screen 7, a collection tank 8, and a screening system drive motor 9; The crushing system 2 includes a rotating shaft 10, a blade assembly 11 mounted on the rotating shaft, and a crushing system drive motor 12; The stirring system 3 includes a stirring shaft 16, stirring blades 17, and a stirring system drive motor 18; The storage system 4 includes a material silo 19, which is equipped with a first material silo 20 for receiving the slag from the collection tank 8, a third material silo 22 for receiving the organic additives from the crushing system 2, and a second material silo 21 for receiving the mixture from the mixing system 3. The first material silo 20 and the third material silo 22 are both connected to the feed inlet of the mixing system 3. The pump-laying system 5 includes a high-pressure pump 23, a nozzle 24, and a pump-laying pipeline 404 connecting the second material bin 21 and the high-pressure pump 23; The control system 6 includes a central processing unit 28 and an actuator module 30 that is electrically connected to the screening system drive motor 9, the crushing system drive motor 12, the mixing system drive motor 18, and the high-pressure pump 23, respectively.

[0029] The equipment mainly consists of a screening system 1, a crushing system 2, a mixing system 3, a storage system 4, a pumping system 5, and a control system 6. Each system is organically connected through pipelines and circuits to form a closed-loop operation unit.

[0030] The core of the screening system 1 is a multi-layer vibrating screen 7, driven by a screening system drive motor 9. In its design, the vibrating screen adopts a multi-layer screen structure with progressively decreasing screen aperture sizes from top to bottom, and collection troughs 8 are set between adjacent screens. This is used for the efficient grading of raw engineering waste soil with complex composition and varying particle sizes. Large-sized bricks, stones, and debris are intercepted and discharged by the upper screen, while fine-grained soil that meets the particle size requirements for farmland soil is screened and collected separately at each stage. This achieves precise extraction of useful soil components and separation of impurities from the waste soil, providing a clean and homogeneous substrate for subsequent improvement.

[0031] The crushing system 2 includes a rotating shaft 10 driven by a crushing system drive motor 12 and a combination blade assembly 11 mounted on it. It is primarily designed for the targeted processing of fibrous organic additives such as straw and green manure. The combination of blades with different shapes can achieve multiple functions such as cutting, tearing, and crushing, quickly crushing the additives to a suitable size of 1-4cm. This increases the contact surface area with the soil to promote decomposition, while also preventing excessively long fibers from entangled in the equipment, ensuring the uniformity of subsequent mixing.

[0032] The core of the mixing system 3 is the mixing shaft 16 and the mixing blades 17 mounted on it, driven by the mixing system drive motor 18. It is used to achieve homogeneous mixing of the slag and organic additives. By controlling the rotational speed and time of the mixing shaft 16, the mixing blades 17 can powerfully and thoroughly mechanically mix the two materials added in a predetermined mass ratio, causing the organic additives to be evenly dispersed among the slag particles, thus initially forming a granular structure to improve soil fertility. This is a key step in enhancing soil fertility and water retention.

[0033] The storage system 4 includes a main material warehouse 19 and its internal functional zones: a first material warehouse 20, a third material warehouse 22, and a second material warehouse 21. The first material warehouse 20 is often designed with multiple sub-warehouses to store different particle sizes of slag. The purpose is to achieve temporary storage, buffering, and precise distribution of materials, ensuring that the screening, crushing, and mixing processes can operate continuously, and that materials can be supplied to the next stage on demand and in proportion under the control system. It is the central link that ensures the continuity of the entire process and the accuracy of the formula.

[0034] The pump-laying system 5 consists of a high-pressure pump 23, a pump-laying pipeline 404, and an end nozzle 24. The pump-laying pipeline 404 integrates a flow regulating valve 27, a pressure sensor 25, and a flow sensor 26, with the aim of achieving efficient and precise delivery and laying of improved soil.

[0035] The high-pressure pump 23 provides the power for conveying, enabling materials to be pumped over long distances and at high flow rates. The adjustable nozzle 24 allows operators to flexibly control the spray direction and the drop area. The sensor module 29, in conjunction with the regulating valve, enables the system to monitor and adjust the flow rate and pressure in real time, thereby precisely controlling the thickness and uniformity of the paving to meet the high standards of farmland flatness.

[0036] The sensor module 29 within the control system 6 consists of a central processing unit 28 and an actuator module 30, working in conjunction with the human-machine interface 31. It coordinates and optimizes the operation of the entire complex system. It receives data from various sensors, such as pressure and flow rate, and through preset programs or manual commands, precisely controls the start / stop and speed of each drive motor, the opening degree of valves, and the power of the pump via the actuator module, displaying key operating statuses on the human-machine interface.

[0037] During operation, construction waste is fed into a multi-layer vibrating screen 7 via a feeding device, where it is rapidly separated into different particle size components. Fine soil falls into the corresponding collection trough 8 and is then transported to the corresponding sub-bin of the first material bin 20 via the first conveying pipe 104 for storage. Organic additives are fed into the crushing system 2 and crushed into predetermined sizes by the high-speed rotating combined blade assembly 11. Subsequently, they are sent to the third material bin 22 via the third conveying pipe 304 for storage.

[0038] According to the set formula ratio, the control system 6 instructs the first material bin 20 and the third material bin 22 to feed materials into the mixing system 3 through the fourth conveying pipe 504 and the fifth conveying pipe 604, respectively. Under the drive, the mixing shaft 16 drives the blades 17 to fully mix the mixture, forming a uniform improved soil, which is then sent to the second material bin 21 for temporary storage through the second conveying pipe 204.

[0039] During the laying operation, the control system 6 activates the high-pressure pump 23 to pump the improved soil from the second material bin 21 through the pumping pipe 404. The entire process is monitored in real time by the flow sensor 26 and the pressure sensor 25, and dynamically adjusted by the flow regulating valve 27 to ensure stable output. The operator can adjust the angle of the nozzle 24 through the control system 6 to spread the soil evenly and precisely to the target farmland area. Example 2

[0040] Reference Figures 1-4 This is the second embodiment of the present invention, which is implemented based on the previous embodiment.

[0041] Specifically, the multi-layer vibrating screen 7 includes a first layer of screen 32, a second layer of screen 33, a third layer of screen 34 and a fourth layer of screen 305 arranged from top to bottom, and the screen hole size of each layer of screen decreases from top to bottom. A collection trough 8 is provided between two adjacent layers of screen.

[0042] The multi-layer vibrating screen 7 specifically includes four layers of screens arranged from top to bottom: the first layer screen 32, the second layer screen 33, the third layer screen 34, and the fourth layer screen 305. The core design is that the screen hole size decreases in a gradient. For example, it can be set to 200mm, 3mm, 1mm, and 0.3mm round holes in sequence.

[0043] The multi-layer screen design forms a highly efficient multi-stage particle size separation channel. Large pieces of construction waste, such as bricks and concrete blocks, are quickly separated and discharged in the first layer; subsequent layers intercept and separate coarse sand, medium and fine sand, and silty soil in sequence. The collection trough 8 below each layer of screen is used to receive and temporarily collect the slag and soil within that particle size range.

[0044] The screen and collection trough 8 are installed alternately, ensuring the continuity of the screening process. Materials of different particle sizes are accurately classified and introduced into the corresponding collection trough under the action of vibration, realizing the fine classification of engineering waste soil.

[0045] Preferably, the blade assembly 11 includes a long strip blade 13, a serrated blade 14, and an arc-shaped blade 15 with complementary structures.

[0046] Each type of blade performs a different mechanical function. The long strip blade 13, for example, is 80mm long and has a cutting edge angle of 30°. It uses its long cutting line to perform preliminary cutting and fixed-length breaking of long fibrous materials such as straw. The serrated blade 14, for example, has a serration spacing of 5mm. It uses its sharp teeth to tear and refine the cut material. The curved blade 15 can play a role in feeding and kneading, preventing material accumulation and promoting uniform crushing.

[0047] When the three types of blades rotate at high speed, such as 200-400 rpm, they form a composite action zone. The long blade cuts first, the serrated blade follows up with tearing, and the curved blade assists in dispersion. This overcomes the shortcomings of single-blade types, such as easy entanglement and uneven crushing. It can efficiently crush various organic additives to the target size range, forming organic materials with uniform size that are easy to mix with soil.

[0048] The first material silo 20 is internally divided into multiple parallel sub-silos, each of which is used to receive and store slag of a specific particle size from different collection tanks 8.

[0049] The outer wall of the collection tank 8 is connected to the first conveying pipe 104 and is connected to the first material bin 20; the discharge port of the crushing system 2 is connected to the third conveying pipe 304 and is connected to the third material bin 22; the discharge port of the mixing system 3 is connected to the second conveying pipe 204 and is connected to the second material bin 21; the first material bin 20 and the third material bin 22 are respectively connected to the inlet of the mixing system 3 through the fourth conveying pipe 504 and the fifth conveying pipe 604.

[0050] The first material bin 20 is divided into multiple parallel sub-bins, and each sub-bin is connected to a collection trough 8 at a specific level on the vibrating screen through the first conveying pipe 104.

[0051] The design of the sub-compartments enables independent and classified storage of slag with different particle size grades. For example, the sub-compartment corresponding to the finest screen can store silt with the highest fertility potential.

[0052] When the mixing system 3 requires material addition, the control system 6 can instruct a specific sub-bin to add material to the mixing system 3 via the fourth conveying pipe 504 and the third material bin 22 (which stores organic matter) via the fifth conveying pipe 604, at a precise mass ratio, for example, 20:1 to 30:1. The second material bin 21 is dedicated to receiving and temporarily storing the uniformly mixed finished improved soil via the second conveying pipe 204, awaiting pumping instructions. The entire storage system acts as a buffer hub between processes and a precise material addition bin, ensuring continuous production and formula consistency.

[0053] The feed end of the pump-laying pipeline 404 is connected to the first material bin 20, the second material bin 21, and the third material bin 22 respectively. The conveying end of the pump-laying pipeline 404 is connected to the high-pressure pump 23, and the discharge end of the high-pressure pump 23 is connected to the nozzle 24.

[0054] The pumping system 5 also includes a flow regulating valve 27 installed on the pumping pipeline 404, and the control end of the flow regulating valve 27 is electrically connected to the control system 6.

[0055] The pumping system 5 also includes a pressure sensor 25 for monitoring material pressure and a flow sensor 26 for monitoring material flow, both of which are installed on the pumping pipeline 404. The pressure sensor 25 and the flow sensor 26 are both connected to the control system 6.

[0056] The feed end of the pump-laying pipeline 404 is designed to selectively connect to the first material bin 20, the second material bin 21, and the third material bin 22. A flow regulating valve 27, as well as a pressure sensor 25 and a flow sensor 26 for real-time monitoring, are integrated into the pipeline. The nozzle 24 is connected to the discharge end of the high-pressure pump 23.

[0057] A flow control valve 27 is installed on the pumping pipeline as an actuator to control the pipeline opening and thus control the material flow. Pressure sensor 25 and flow sensor 26, as monitoring devices, are installed close to the control valve or key pipeline sections to acquire real-time pipeline operating conditions. All three are connected to the central processing unit 28 and actuator module 30 of the control system 6 via cables.

[0058] During the laying operation, the high-pressure pump 23 pumps the improved soil out of the second material bin 21. The flow sensor 26 provides real-time feedback on the actual flow rate. The central processing unit 28 compares this signal with the set values, corresponding to the laying thickness and forward speed. If a deviation exists, the actuator module 30 immediately adjusts the opening of the flow regulating valve 27 to achieve dynamic fine-tuning of the flow rate. Simultaneously, the pressure sensor 25 monitors the system pressure to prevent pipe blockage or insufficient pressure. The adjustable-angle nozzle 24 allows the operator to adjust the spray pattern according to the laying width and terrain. The nozzle 24 can be adjusted within the range of 0-120°.

[0059] Preferably, the control system 6 also includes a human-machine interface 31 for parameter setting and status display, and the human-machine interface 31 is connected to the central processing unit 28 via a signal.

[0060] Through the human-machine interface 31, operators can input key process parameters, such as the frequency of the screening motor, the rotation speed of the crushing blades, the mixing time, the mixing ratio of slag and organic matter, and the target laying flow rate and thickness. At the same time, they can monitor the operating status of each motor, sensor readings, material bin positions, and other information in real time. The central processing unit 28 integrates these instructions and data, and coordinates the start-up, shutdown, speed, and actions of all subsystems through the actuator module 30. Example 3

[0061] This is a third embodiment of the present invention, which provides a method of use.

[0062] Specifically, it includes the following steps: S1. Equipment Debugging: Check that the connections of the screening system 1, crushing system 2, mixing system 3, storage system 4, pumping system 5, control system 6, and other related devices are normal; turn on the power supply and debug the device, test the vibration of the multi-layer vibrating screen 7, the rotation of the rotating shaft 10 and the mixing shaft 16, the sealing of the first conveying pipe 104, the second conveying pipe 204, the third conveying pipe 304, the pumping pipe 404, the fourth conveying pipe 504, the fifth conveying pipe 604, and the spraying of the nozzle 24, and make corresponding adjustments based on the test results.

[0063] S2. Slag Screening: The slag to be processed is placed on the first layer of the multi-layer vibrating screen 7. The screening system drive motor 9 is started, and the output frequency of the screening system drive motor 9 is adjusted by the control system 6 so that the multi-layer vibrating screen 7 operates at a suitable vibration frequency and amplitude. The slag vibrates on the multi-layer vibrating screen 7, and slag of different particle sizes passes through the screen in sequence and falls into the corresponding collection trough 8, completing the slag screening process. The slag of different particle sizes is then stored in the corresponding sub-bins of the first material bin 20 through the conveying pipe 104.

[0064] S3. Additive crushing: Organic additives such as straw and green manure crops are put into the crushing system 2. The crushing system drive motor 12 is started to crush the organic additives to 1cm to 4cm. After crushing, the organic additives are stored in the third material bin 22 through the conveying pipe 304.

[0065] S4. Mixing and stirring: The slag in the first material bin 20 and the organic additives in the third material bin 22 are conveyed to the stirring system 3 through the conveying pipes 504 and 604 respectively; the stirring system drive motor 18 is started, and the stirring shaft 16 drives the stirring blades 17 to rotate, so as to fully stir the organic additives and slag until the organic additives and slag are evenly mixed, and then stored in the second material bin 21 through the conveying pipe 204.

[0066] S5. Improved Slag Laying: Start the high-pressure pump 23 to transport the improved slag through the pump laying pipeline 404 to the nozzle 24; adjust the nozzle angle of the nozzle 24 according to the laying thickness through the control system 6; adjust the spray direction of the nozzle 24 according to the laying area through the control system 6, and adjust the material flow rate through the flow regulating valve 27 to ensure that the material flow rate delivered to the laying area meets the standard; at the same time, monitor the pressure in the pump laying pipeline 404 through the pressure sensor 25 to complete the slag laying.

[0067] Step 1: Equipment preparation and system debugging Before commencing operations, a comprehensive equipment inspection and debugging must be conducted to ensure that all systems are in normal working order and connections are reliable.

[0068] Connection check: Confirm that the connections between screening system 1, crushing system 2, mixing system 3, storage system 4, pumping system 5, and control system 6 are secure and correct.

[0069] Power-on commissioning: Connect the power supply and start each subsystem sequentially through the human-machine interface 31 of the control system 6 for no-load test run.

[0070] Check whether the vibration of the multi-layer vibrating screen 7 is stable and without abnormal noise, and whether the amplitude and frequency are adjustable.

[0071] Check whether the rotation direction of the crushing system rotating shaft 10 and the stirring system stirring shaft 16 is correct and whether the rotation is smooth.

[0072] Check the sealing of all delivery pipes and interfaces to ensure there are no leaks.

[0073] Test the start-up, shutdown, and pressure build-up of the high-pressure pump 23, and manually adjust the angle of the nozzle 24 to observe its operational flexibility.

[0074] Parameter preset: Based on the estimated properties of the slag to be treated (such as moisture, viscosity, initial particle size distribution) and the laying requirements of the target farmland (laying thickness, soil ratio), the corresponding process parameter templates can be preset or selected on the human-machine interface 31.

[0075] Step 2: Refined screening and grading of construction waste This step aims to separate soil particles suitable for farmland use from the original construction waste.

[0076] Feeding and Start-up: The construction waste is evenly fed into the feed end of the multi-layer vibrating screen 7, which is in operation, i.e., the first layer screen 32.

[0077] Dynamic adjustment: The operator can fine-tune the output frequency of the drive motor 9 of the screening system in real time (which can be adjusted in the range of 8-60Hz) according to the actual moisture and impurity content of the slag through the control system 6, thereby changing the vibration intensity and frequency of the vibrating screen to optimize screening efficiency and anti-clogging effect.

[0078] Graded collection and conveying: Under vibration, the slag moves along the screen surface. Impurities larger than 200mm are discharged from the end of the first screen layer; materials smaller than 200mm fall to the second screen layer 33 (screen openings such as 3mm), and so on, passing through the third layer 34 (screen openings such as 1mm), and the fourth layer 305 (screen openings such as 0.3mm), for progressive sieving. Slag within a specific particle size range (e.g., 3-1mm, 1-0.3mm, <0.3mm) from each stage falls into the corresponding collection trough 8 between layers.

[0079] Categorized storage: The slag in each collection tank 8 is transported pneumatically or mechanically to the corresponding independent sub-bins in the first material bin 20 via the first conveying pipe 104. This completes the transformation of the slag from a mixed state to finely categorized storage according to particle size.

[0080] Step 3: Targeted crushing and storage of organic additives This step prepares organic matter raw materials for soil improvement.

[0081] Feeding and crushing: Organic additives such as straw and green manure crops are fed into the feed inlet of crushing system 2. The crushing system drive motor 12 is started, driving the rotating shaft 10 and the combined blade assembly 11 mounted on it, including long strip blades 13, serrated blades 14, and arc blades 15, to rotate at a speed of 200-400 rpm.

[0082] Crushing control: The blade assembly performs a combination of cutting, tearing, and kneading on the additives, crushing them into suitable lengths of 1-4cm. The particle size can be controlled by adjusting the drive motor speed.

[0083] Material conveying: The crushed organic additives are conveyed through the third conveying pipe 304 to the third material bin 22 for centralized storage and later use.

[0084] Step 4: Improved Precision Ingredient Mixing and Uniform Stirring This step is central to creating qualified improved soil, and the key lies in precise formulation and thorough mixing.

[0085] Intelligent batching: The control system 6 sends instructions to the storage system 4 according to the preset improved formula (usually the dry mass ratio of slag and organic additives is between 20:1 and 30:1).

[0086] Material delivery: After the instruction is triggered, the designated sub-bin in the first material bin 20 (selecting slag of a specific particle size or a combination of several slags according to the formula requirements) delivers the material to the mixing bin of the mixing system 3 in a set ratio synchronously or sequentially through the fourth conveying pipe 504, and the third material bin 22 delivers the material to the mixing bin of the mixing system 3 in a set ratio through the fifth conveying pipe 604.

[0087] High-efficiency mixing: Start the mixing system drive motor 18, drive the mixing shaft 16 to rotate at a speed of 50-300 rpm, and the mixing blades 17 distributed on the shaft will strongly and fully mechanically mix the input slag and organic additives.

[0088] Homogenization and Transfer: Stirring continues until the mixture is uniform in color and texture (usually taking several minutes), indicating that the organic additives have been evenly dispersed in the slag and soil, forming improved soil. Subsequently, the uniformly mixed material is transported through the second conveying pipe 204 to the second material silo 21 for temporary storage, awaiting paving.

[0089] Step 5: Controllable pumping and intelligent precision laying This step involves applying high-quality soil amendments to the field.

[0090] Pumping Start-up: After the operator confirms that the laying area is ready, the high-pressure pump 23 is started through the control system 6.

[0091] Closed-loop flow control: The high-pressure pump pumps the improved soil from the second material bin 21 out through the pump-laying pipe 404. The flow sensor 26 and pressure sensor 25 installed on the pipe feed the monitoring data back to the central processing unit 28 in real time.

[0092] The central processing unit 28 compares the measured flow rate with the target value calculated based on the laying thickness and the equipment travel speed.

[0093] If any deviation occurs, the processor immediately adjusts the opening of the flow regulating valve 27 on the pipeline through the actuator module 30 to achieve real-time, closed-loop, and stable control of the material conveying flow, ensuring that the amount of soil delivered per unit area is accurate.

[0094] Precision spraying: The high-pressure material flow ultimately reaches nozzle 24. Operators can adjust the spray angle of the nozzle in real time (e.g., within the range of 0-120°) through the control system according to the paving width, terrain slope, and wind direction to control the trajectory and distribution range of the soil.

[0095] Linked operation: During the laying process, the equipment can move slowly or cooperate with traction equipment to achieve continuous and uninterrupted strip or surface laying operations.

[0096] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A slag soil screening and improvement pump laying integrated device for farmland construction, characterized in that: include: ​ The screening system (1) includes a multi-layer vibrating screen (7), a collection tank (8) and a screening system drive motor (9). The crushing system (2) includes a rotating shaft (10), a blade assembly (11) mounted on the rotating shaft, and a crushing system drive motor (12). The stirring system (3) includes a stirring shaft (16), stirring blades (17) and a stirring system drive motor (18). The storage system (4) includes a material silo (19), which is equipped with a first material silo (20) for receiving slag from the collection tank (8), a third material silo (22) for receiving organic additives from the crushing system (2), and a second material silo (21) for receiving mixtures from the mixing system (3). The first material silo (20) and the third material silo (22) are both connected to the feed inlet of the mixing system (3). The pumping system (5) includes a high-pressure pump (23), a nozzle (24) and a pumping pipeline (404) connecting the second material bin (21) and the high-pressure pump (23). The control system (6) includes a central processing unit (28) and actuator modules (30) electrically connected to the screening system drive motor (9), the crushing system drive motor (12), the stirring system drive motor (18), and the high-pressure pump (23), respectively.

2. The integrated equipment for screening, improving, pumping, and laying slag in farmland construction as described in claim 1, characterized in that: The multi-layer vibrating screen (7) includes a first layer screen (32), a second layer screen (33), a third layer screen (34) and a fourth layer screen (305) arranged from top to bottom, and the screen hole size of each layer screen decreases from top to bottom. A collection trough (8) is provided between two adjacent layers of screens.

3. The integrated equipment for screening, improving, pumping, and laying slag in farmland construction as described in claim 2, characterized in that: The blade assembly (11) includes structurally complementary long strip blades (13), serrated blades (14), and curved blades (15).

4. The integrated equipment for screening, improving, pumping, and paving slag in farmland construction as described in claim 3, characterized in that: The first material silo (20) is divided into multiple parallel sub-silos, and each sub-silo is used to receive and store slag of a specific particle size from different collection tanks (8).

5. The integrated equipment for screening, improving, pumping, and paving slag in farmland construction as described in claim 4, characterized in that: The outer wall of the collection tank (8) is connected to a first conveying pipe (104) and connected to the first material bin (20); the outlet of the crushing system (2) is connected to a third conveying pipe (304) and connected to the third material bin (22); the outlet of the stirring system (3) is connected to a second conveying pipe (204) and connected to the second material bin (21); the first material bin (20) and the third material bin (22) are respectively connected to the inlet of the stirring system (3) through a fourth conveying pipe (504) and a fifth conveying pipe (604).

6. The integrated equipment for screening, improving, pumping, and laying slag in farmland construction as described in claim 5, characterized in that: The feed end of the pump-laying pipe (404) is connected to the first material bin (20), the second material bin (21), and the third material bin (22), respectively. The conveying end of the pump-laying pipe (404) is connected to the high-pressure pump (23), and the discharge end of the high-pressure pump (23) is connected to the nozzle (24).

7. The integrated equipment for screening, improving, pumping, and laying slag in farmland construction as described in claim 6, characterized in that: The pumping system (5) also includes a flow regulating valve (27) installed on the pumping pipeline (404), and the control end of the flow regulating valve (27) is electrically connected to the control system (6).

8. The integrated equipment for screening, improving, pumping, and laying slag in farmland construction as described in claim 7, characterized in that: The pumping system (5) also includes a pressure sensor (25) for monitoring material pressure and a flow sensor (26) for monitoring material flow rate, both of which are installed on the pumping pipeline (404). The pressure sensor (25) and the flow sensor (26) are both connected to the control system (6) via signal connection.

9. The integrated equipment for screening, improving, pumping, and laying slag in farmland construction as described in claim 8, characterized in that: The control system (6) also includes a human-machine interface (31) for parameter setting and status display, and the human-machine interface (31) is connected to the central processing unit (28).

10. A method of use, applied to the integrated equipment for screening, improving, pumping, and laying slag in farmland construction as described in any one of claims 1 to 9, characterized in that: Includes the following steps: S1. Equipment debugging: Check that the connections of the screening system (1), crushing system (2), stirring system (3), storage system (4), pumping system (5), control system (6) and other related devices are normal; turn on the power and debug the device, test the vibration of the multi-layer vibrating screen (7), the rotation of the rotating shaft (10), the stirring shaft (16), the sealing of the first conveying pipe (104), the second conveying pipe (204), the third conveying pipe (304), the pumping pipe (404), the fourth conveying pipe (504), the fifth conveying pipe (604) and the spraying of the nozzle (24), and make corresponding adjustments according to the test results. S2. Slag screening: The slag to be processed is placed on the first layer of the multi-layer vibrating screen (7), the screening system drive motor (9) is started, and the output frequency of the screening system drive motor (9) is adjusted by the control system (6) so that the multi-layer vibrating screen (7) works with a suitable vibration frequency and amplitude; the slag vibrates on the multi-layer vibrating screen (7), and slag of different particle sizes passes through the screen in sequence and falls into the corresponding collection trough (8) to complete the slag screening process. The slag of different particle sizes is stored in the corresponding sub-bin of the first material bin (20) through the conveying pipe (104). S3. Additive crushing: Organic additives such as straw and green manure crops are placed into the crushing system (2), and the crushing system drive motor (12) is started to crush the organic additives to 1cm to 4cm. After crushing, the organic additives are stored in the third material bin (22) through the conveying pipe (304). S4. Mixing and stirring: The slag in the first material bin (20) and the organic additives in the third material bin (22) are respectively transported to the stirring system (3) through the conveying pipes (504) and (604); the driving motor (18) of the stirring system is started, and the stirring shaft (16) drives the stirring blades (17) to rotate, so as to fully stir the organic additives and slag until the organic additives and slag are evenly mixed, and then stored in the second material bin (21) through the conveying pipe (204). S5. Improved slag laying: Start the high-pressure pump (23) to transport the improved slag through the pump laying pipeline (404) to the nozzle (24); adjust the nozzle angle of the nozzle (24) according to the laying thickness through the control system (6); adjust the spray direction of the nozzle (24) according to the laying area through the control system (6), and adjust the flow rate of the material through the flow regulating valve (27) so that the flow rate of the material delivered to the laying area meets the standard; at the same time, monitor the pressure in the pump laying pipeline (404) through the pressure sensor (25) to complete the slag laying.

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