Automatic mixing and conveying device for ready-mixed light aerated solidified soil

Abstract

The application discloses a premixed light fluidified stabilized soil automatic mixing and conveying device, and relates to the technical field of fluidified stabilized soil preparation. The premixed light fluidified stabilized soil automatic mixing and conveying device comprises a mixing system, a conveying system and a control system. The mixing system comprises a mixing bin, a soil material feeding module, a water feeding device, a stabilizer feeding module, an additive adding module and a stirring device. The conveying system comprises a pre-storage bin and a pumping device. The mixing system stirs the quantitative soil material, water, stabilizer and additive to prepare light fluidified stabilized soil, and conveys the light fluidified stabilized soil to the pre-storage bin. The pumping device pumps the light fluidified stabilized soil in the pre-storage bin to a designated position for construction. The whole preparation process and the pumping process of the light fluidified stabilized soil are realized through the control system, which can not only realize accurate control of material mixing amount and uniform mixing of the mixture, but also improve the preparation efficiency and construction quality of the light fluidified stabilized soil.

Description

Technical Field

[0001] This invention relates to the field of fluidized solidified soil preparation technology, and in particular to an automated mixing and conveying device for premixed lightweight fluidized solidified soil. Background Technology

[0002] In the civil engineering and construction industries, lightweight fluidized solidified soil, as a high-performance and environmentally friendly new type of geotechnical engineering material, has received widespread attention and application in recent years. This material is mainly composed of soil, a solidifying agent, water, and other possible additives, and is formed into a solidified soil body with high strength, low permeability, and good stability through a specific mixing process. Lightweight fluidized solidified soil not only effectively solves the problems of insufficient strength and easy deformation of traditional soil amendment materials, but also enables the resource utilization of waste, reduces environmental pollution, and aligns with the concept of sustainable development.

[0003] However, in practical applications, the preparation process of lightweight fluidized solidified soil faces numerous challenges. Traditional mixing methods mostly rely on manual operation, which is not only inefficient but also makes it difficult to precisely control the material dosage, resulting in unstable quality of the mixture and affecting subsequent construction quality and project safety. In addition, traditional conveying methods also suffer from low conveying efficiency, high energy consumption, and susceptibility to blockages, making it difficult to meet the requirements of modern engineering for efficient, continuous, and automated construction.

[0004] To address these issues, both within and outside the industry, there has been active exploration of automated mixing and conveying technologies for lightweight fluidized solidified soil. However, most existing automated mixing and conveying devices suffer from complex structures, high maintenance costs, and poor adaptability, making it difficult to meet the needs of different engineering environments and material properties. Therefore, developing an automated mixing and conveying device for pre-mixed lightweight fluidized solidified soil that is simple in structure, easy to operate, has stable performance, and is highly adaptable has become an urgent technical challenge.

[0005] In terms of technological research and development, scholars and engineers both domestically and internationally have made some beneficial attempts. For example, by improving the structure and mixing method of the mixing machine, mixing efficiency and the uniformity of the mixture can be increased; by optimizing the design and control strategy of the conveying system, energy consumption and the risk of blockage can be reduced; and by introducing advanced sensors and control systems, precise control of material dosage and automated monitoring of the construction process can be achieved. However, most of these technologies are still in the research stage and have not yet formed mature products or been widely applied in practical engineering.

[0006] Therefore, this invention proposes an automated mixing and conveying device for pre-mixed lightweight fluidized solidified soil. The aim is to solve the problems existing in the prior art through technological innovation, improve the preparation efficiency and construction quality of lightweight fluidized solidified soil, and promote the widespread application of this material in civil engineering and the construction industry. The device of this invention not only has the advantages of simple structure, convenient operation, stable performance, and strong adaptability, but also enables precise control of material dosage, uniform mixing of the mixture, and automated monitoring of the construction process, providing strong technical support for the efficient preparation and high-quality construction of lightweight fluidized solidified soil. Summary of the Invention

[0007] To address the aforementioned problems in the existing technology, this invention provides an automated mixing and conveying device for premixed lightweight fluidized solidified soil. The aim is to solve the problems of low efficiency and low proportioning accuracy in the preparation and conveying process of existing lightweight fluidized solidified soil, which makes it difficult to meet the requirements of modern engineering for efficient, continuous and automated construction.

[0008] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: providing an automated mixing and conveying device for premixed lightweight fluidized solidified soil, which includes a mixing system, a conveying system and a control system;

[0009] The mixing system includes a mixing bin, which is connected to a soil feeding module, a water inlet device, a curing agent feeding module, an additive adding module, and a mixing device, all of which are electrically connected to the control system.

[0010] The conveying system includes a pre-storage bin and a pumping device electrically connected to the control system;

[0011] The soil feeding module crushes and screens the soil and quantitatively delivers the processed soil to the mixing bin; the water inlet device quantitatively delivers water to the mixing bin; the curing agent feeding module quantitatively delivers curing agent to the mixing bin; the additive adding module quantitatively delivers additives to the mixing bin; and the mixing device mixes the soil, water, curing agent, and additives in the mixing bin.

[0012] The pre-storage bin is connected to the mixing bin via a fluidized solidified soil conveying pipe assembly, and a pumping device is connected to the outlet end of the pre-storage bin.

[0013] Furthermore, the top of the mixing silo is equipped with multiple feeding ports; the outlets of the soil feeding module, water inlet device, curing agent feeding module and additive addition module are all connected to the mixing silo through the feeding ports.

[0014] Furthermore, the soil feeding module includes a conveyor belt assembly, a crushing assembly, a screening cylinder assembly, and a first tubular screw weighing conveyor;

[0015] The crushing assembly includes a feed hopper, a crushing disc is rotatably mounted at the bottom of the feed hopper and is driven to rotate by a motor, and a discharge guide plate is mounted below the crushing disc; the discharge port of the conveyor belt assembly is located at the top of the feed hopper.

[0016] The screening cylinder assembly includes a drive unit, a drum screen, and a collection plate located below the drum screen. The drive unit drives the drum screen to rotate around its own axis. The drum screen is set in a horizontally inclined manner, and a drum screen inlet is provided on the high side of the drum screen.

[0017] The discharge port of the conveyor belt assembly is connected to the top inlet of the feed hopper, the bottom outlet of the feed hopper is connected to the feed inlet of the drum screen, the discharge port of the collection plate is connected to the feed inlet of the first tubular screw weighing conveyor, and the discharge port of the first tubular screw weighing conveyor is connected to the mixing bin through a feed interface.

[0018] A first switching valve is installed at the bottom outlet of the feed hopper and at the discharge port of the collection plate; the conveyor belt assembly, motor, drive components, first tubular screw weighing conveyor and the first switching valve are all electrically connected to the control system.

[0019] Furthermore, the water inlet device includes a water inlet pipe, one end of which is connected to the mixing chamber through a feed inlet, and the other end of which is connected to a water source. A metering pump electrically connected to the control system is connected to the water inlet pipe.

[0020] Furthermore, the curing agent feeding module includes a curing agent storage tank. The bottom outlet of the curing agent storage tank is connected to a second tubular screw weighing conveyor that is electrically connected to the control system. The outlet of the second tubular screw weighing conveyor is connected to the mixing bin through a feed interface.

[0021] Furthermore, the additive addition module includes an additive box located at the top of the mixing chamber. The top of the additive box is fitted with a cover, and the bottom of the additive box has a discharge pipe. The bottom end of the discharge pipe is connected to the mixing chamber via a feed inlet. An additive weighing assembly is located in the middle of the discharge pipe. The additive weighing assembly includes a weighing box and a rotating motor mounted on the outer wall of the weighing box. The top and bottom of the weighing box each have a feed channel and a discharge channel connected to the discharge pipe, respectively. A second switching valve is located within the feed channel. Inside the weighing box, a rotating rod and a support plate are installed. One end of the rotating rod passes through the middle of the support plate and is fixedly connected to it. The other end passes through the weighing box and is connected to the output end of the rotating motor via a transmission mechanism. A gravity sensing plate is located on the upper surface of the support plate. The area of ​​the upper surfaces of the support plate and the gravity sensing plate is the same as the cross-sectional area of ​​the weighing box. The rotating motor, the second switching valve, and the gravity sensing plate are all electrically connected to the control system.

[0022] Furthermore, the stirring device includes a stirring shaft and a variable frequency motor electrically connected to the controller;

[0023] The stirring shaft is set vertically, with one end located inside the mixing chamber and equipped with a stirring rod and stirring blades, and the other end located outside the mixing chamber and connected to a driven pulley. The variable frequency motor is located outside the mixing chamber, and a drive pulley is fixedly connected to the output shaft of the variable frequency motor. The driven pulley and the drive pulley are driven by a belt.

[0024] Furthermore, the pre-storage silo is located on one side below the mixing silo, and the top of the pre-storage silo is provided with a fluidized solidified soil inlet; the bottom of the mixing silo is provided with a fluidized solidified soil outlet; the fluidized solidified soil inlet and the fluidized solidified soil outlet are connected by a fluidized solidified soil conveying pipe assembly, and the fluidized solidified soil conveying pipe assembly is provided with a third switching valve and a first gear pump that are electrically connected to the control system.

[0025] Furthermore, the pumping device includes a fluidized solidified soil pumping pipe, one end of which is connected to a pre-storage bin, the other end of which is connected to a spray head, and a second gear pump is installed in the middle of the fluidized solidified soil pumping pipe.

[0026] The pre-storage chamber is equipped with a fluidized solidified soil circulation assembly, which includes a circulation pipe that is coiled around the outer wall of the pre-storage chamber. A third gear pump is installed in the middle of the circulation pipe, and the two ends of the circulation pipe are connected to the top and bottom of the pre-storage chamber, respectively. The second and third gear pumps are both electrically connected to the control system.

[0027] Furthermore, a wall scraping assembly is provided on the pre-storage chamber. The wall scraping assembly includes a scraper and a lead screw motor electrically connected to the control system. The lead screw motor is located on the top of the pre-storage chamber. A rotating lead screw is fixedly connected to the output end of the pre-storage chamber. The scraper is located inside the pre-storage chamber. A lead screw nut that is threadedly engaged with the rotating lead screw is provided at the center of the scraper. Rubber scraper rings that contact the inner wall of the pre-storage chamber are provided at the four edges of the scraper. A limiting post is provided on the vertical protrusion inside the pre-storage chamber. A notch that slides with the limiting post is provided at the same position on the scraper and the rubber scraper ring.

[0028] The beneficial effects of this invention are as follows:

[0029] 1. The automated mixing and conveying device for pre-mixed lightweight fluidized solidified soil in this invention involves a mixing system that stirs a fixed amount of soil, water, solidifying agent, and additives to prepare lightweight fluidized solidified soil. The lightweight fluidized solidified soil is then conveyed to a pre-storage silo via a fluidized solidified soil conveying pipe assembly. A pumping device then pumps the lightweight fluidized solidified soil from the pre-storage silo to a designated location for construction. The entire preparation and pumping process of the lightweight fluidized solidified soil is controlled by a control system, enabling precise control of material dosage, uniform mixing of the mixture, and automated pumping during construction. This not only improves the preparation efficiency and construction quality of the lightweight fluidized solidified soil but also promotes its widespread application in civil engineering and the construction industry.

[0030] 2. The automated mixing and conveying device for premixed lightweight fluidized solidified soil in this invention achieves precise metering and conveying of soil materials by setting up a first tubular screw weighing conveyor, a metering pump for precise metering and pumping of water, a second tubular screw weighing conveyor for precise metering and conveying of solidifying agent, and an additive weighing component for precise metering and addition of additives, ultimately achieving the goal of ensuring controllable quality of the mixture.

[0031] 3. The pre-mixed lightweight fluidized solidified soil automated mixing and conveying device of the present invention has a fluidized solidified soil circulation component installed outside the pre-storage bin. The fluidized solidified soil circulation component circulates and pumps the lightweight fluidized solidified soil in the pre-storage bin to ensure that the lightweight fluidized solidified soil has a uniform texture and avoids the lightweight fluidized solidified soil from settling and separating.

[0032] 4. The pre-mixed lightweight fluidized solidified soil automated mixing and conveying device of the present invention is equipped with a wall scraping component on the pre-storage silo. The wall scraping component is used to scrape off the lightweight fluidized solidified soil adhering to the inner wall of the pre-storage silo, so as to prevent the lightweight fluidized solidified soil from adhering to the inner wall of the pre-storage silo for a long time and ensure the smooth conveying of the lightweight fluidized solidified soil. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of an automated mixing and conveying device for premixed lightweight fluidized solidified soil.

[0034] Figure 2 This is a structural diagram of the soil feeding module.

[0035] Figure 3 A schematic diagram of the additive addition module.

[0036] Figure 4 This is a front view schematic diagram of the additive weighing component.

[0037] Figure 5 This is a side view of the additive weighing assembly.

[0038] Figure 6This is a schematic diagram of the stirring device.

[0039] Figure 7 This is a schematic diagram of the wall scraping assembly.

[0040] Figure 8 This is a top view of the scraper's structure.

[0041] Among them, 1. Mixing bin;

[0042] 2. Soil feeding module; 21. Conveyor belt assembly; 22. Crushing assembly; 221. Feed hopper; 222. Crushing disc; 223. Discharge guide plate;

[0043] 23. Screening cylinder assembly; 231. Rotary drum screen; 232. Material collection plate; 233. Rotary drum screen inlet;

[0044] 24. First type of tubular screw conveyor;

[0045] 3. Water inlet device; 31. Water inlet pipe; 32. Metering pump;

[0046] 4. Curing agent feeding module; 41. Curing agent storage tank; 42. Second tubular screw conveyor;

[0047] 5. Additive addition module; 51. Additive box; 52. Box cover; 53. Discharge pipe; 54. Additive weighing assembly; 541. Weighing box; 542. Rotary motor; 543. Feeding channel; 544. Discharge channel; 545. Second switching valve; 546. Rotating rod; 547. Support plate; 548. Gravity sensing plate;

[0048] 6. Stirring device; 61. Stirring shaft; 62. Variable frequency motor; 63. Stirring rod; 64. Stirring blades; 65. Driven pulley; 66. Driven pulley;

[0049] 7. Pre-stored inventory;

[0050] 8. Pumping device; 81. Fluidized solidified soil pumping pipe; 82. Spray head; 83. Second gear pump;

[0051] 9. Control system;

[0052] 10. Feed interface;

[0053] 11. First switching valve;

[0054] 12. Fluidized solidified soil delivery pipe assembly;

[0055] 13. Third switching valve;

[0056] 14. First gear pump;

[0057] 15. Fluidized solidified soil circulation assembly; 151. Circulation pipe; 152. Third gear pump;

[0058] 16. Scraper; 17. Lead screw motor; 18. Rotary lead screw; 19. Lead screw nut; 20. Rubber scraper ring; 21. Limiting post; 22. Notch. Detailed Implementation

[0059] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0060] like Figures 1 to 8 As shown, this invention provides an automated mixing and conveying device for premixed lightweight fluidized solidified soil, comprising a mixing system, a conveying system, and a control system 9. The mixing system includes a mixing bin 1, on which are connected a soil feeding module 2, a water inlet device 3, a curing agent feeding module 4, an additive adding module 5, and a stirring device 6, all electrically connected to the control system 9. The conveying system includes a pre-storage bin 7 and a pumping device 8 electrically connected to the control system 9. The soil feeding module 2 crushes and screens the soil and quantitatively conveys the processed soil to the mixing bin 1. The water inlet device 3 quantitatively conveys water to the mixing bin 1. The curing agent feeding module 4 quantitatively conveys curing agent to the mixing bin 1. The additive adding module 5 quantitatively conveys additives to the mixing bin 1. The stirring device 6 stirs the soil, water, curing agent, and additives within the mixing bin 1. The pre-storage bin 7 is connected to the mixing bin 1 via a fluidized solidified soil conveying pipe assembly 12, and the outlet end of the pre-storage bin 7 is connected to the pumping device 8.

[0061] The basic principle of the automated mixing and conveying device for premixed lightweight fluidized solidified soil is as follows: The control system 9 includes a PLC controller, which can be installed on the outer wall of the mixing bin 1. The PLC controller has a built-in control program that controls the mixing system and the conveying system. The mixing system mixes a fixed amount of soil, water, solidifying agent, and additives to prepare lightweight fluidized solidified soil. The lightweight fluidized solidified soil is then conveyed to the pre-storage bin 7 through the fluidized solidified soil conveying pipe assembly 12. The pumping device 8 pumps the lightweight fluidized solidified soil in the pre-storage bin 7 to the designated location for construction. The entire preparation process and pumping process of the lightweight fluidized solidified soil are realized through the control system 9. This not only enables precise control of material dosage, uniform mixing of the mixture, and automated pumping during construction, but also improves the preparation efficiency and construction quality of the lightweight fluidized solidified soil, promoting its widespread application in civil engineering and the construction industry.

[0062] Preferably, but not limited to, the top of the mixing chamber 1 is provided with multiple feed ports 10; the outlets of the soil feeding module 2, water inlet device 3, curing agent feeding module 4 and additive addition module 5 are all connected to the mixing chamber 1 through the feed ports 10, which facilitates the assembly and disassembly of the soil feeding module 2, water inlet device 3, curing agent feeding module 4 and additive addition module 5 with the mixing chamber 1, and facilitates later maintenance and replacement of parts.

[0063] As a specific configuration of the soil feeding module 2, the soil feeding module 2 includes a conveyor belt assembly 21, a crushing assembly 22, a screening cylinder assembly 23, and a first tubular screw weighing conveyor 24; the crushing assembly 22 includes a feed hopper 221, with a crushing disc 222 rotatably mounted at the bottom of the feed hopper 221, the crushing disc 222 being driven to rotate by a motor, and a discharge guide plate 223 being mounted below the crushing disc 222; the discharge port of the conveyor belt assembly 21 is located at the top of the feed hopper 221; the screening cylinder assembly 23 includes a driving component, a drum screen 231, and a collecting plate 232 mounted below the drum screen 231, the driving component driving the drum screen 231 to rotate around its own axis, the driving component being a motor or other driving device, and the drum screen 231 being horizontally inclined. A drum screen inlet 233 is provided on the high side of the drum screen 231; the outlet of the conveyor belt assembly 21 is connected to the top inlet of the feed hopper 221, the bottom outlet of the feed hopper 221 is connected to the drum screen inlet 233, the outlet of the collection plate 232 is connected to the inlet of the first tubular screw weighing conveyor 24, and the outlet of the first tubular screw weighing conveyor 24 is connected to the mixing bin 1 through a feed interface 10; a first switching valve 11 is provided at the bottom outlet of the feed hopper 221 and the outlet of the collection plate 232, and the first switching valve 11 is used to control the conveying of soil; the conveyor belt assembly 21, the motor, the drive component, the first tubular screw weighing conveyor 24 and the first switching valve 11 are all electrically connected to the control system 9.

[0064] The principle of the soil feeding module 2 is as follows: the soil in the lightweight fluidized solidified soil can be local rock soil, loam, and excavated trench soil, or it can utilize miscellaneous fill, fine particles of construction waste, engineering mud, silt, tailings, etc. The soil, as the basic material of the lightweight fluidized solidified soil, provides the main volume and mass. The conveyor belt assembly 21 first transports the soil to the feed hopper 221. The crushing disc 222 at the bottom of the feed hopper 221 crushes the soil and transports the crushed soil through the discharge guide plate 223 to the feed port 233 of the drum screen. Due to the rotation of the drum screen 231, small stones and other impurities in the crushed soil are screened and filtered. The filtered soil enters the first tubular screw weighing conveyor 24 through the collection plate 232. The first tubular screw weighing conveyor 24 quantitatively transports the soil to the mixing bin 1, waiting for mixing.

[0065] As a specific configuration of the water inlet device 3, the water inlet device 3 includes a water inlet pipe 31. One end of the water inlet pipe 31 is connected to the mixing chamber 1 through a feed inlet 10, and the other end of the water inlet pipe 31 is connected to a water source. A metering pump 32, which is electrically connected to the control system 9, is connected to the water inlet pipe 31. The metering pump 32 can pump water quantitatively to the mixing chamber 1.

[0066] As a specific configuration of the curing agent feeding module 4, the curing agent feeding module 4 includes a curing agent storage tank 41. The bottom outlet of the curing agent storage tank 41 is connected to a second tubular screw conveyor 42, which is electrically connected to the control system 9. The outlet of the second tubular screw conveyor 42 is connected to the mixing bin 1 through a feed inlet 10. The curing agent is a key component in lightweight fluidized solidified soil, enabling the soil to form a hard solid structure. Curing agents typically consist mainly of CaO, activated Al2O3, and SiO2, with the addition of functional additives and activators to improve the surface properties of soil particles, creating a functional composite cementitious material. The type and dosage of the curing agent must be matched according to the properties of the soil to ensure optimal curing effect. In specific construction sites, cement powder is usually selected as the curing agent; therefore, the second tubular screw conveyor 42 is used to quantitatively transport the cement powder.

[0067] As a specific configuration of the additive addition module 5, the additive addition module 5 includes an additive box 51 located at the top of the mixing chamber 1. The top of the additive box 51 is equipped with a box cover 52, and the bottom of the additive box 51 is equipped with a discharge pipe 53. The bottom end of the discharge pipe 53 is connected to the mixing chamber 1 through a feed inlet 10. An additive weighing component 54 is located in the middle of the discharge pipe 53. The additive weighing component 54 includes a weighing box 541 and a rotating motor 542 located on the outer wall of the weighing box 541. The top and bottom of the weighing box 541 are respectively equipped with a feed channel 543 and a discharge channel connected to the discharge pipe 53. 544. A second switching valve 545 is installed in the feeding channel 543. A rotating rod 546 and a bearing plate 547 are installed inside the weighing box 541. One end of the rotating rod 546 passes through the middle of the bearing plate 547 and is fixedly connected to it. The other end passes through the weighing box 541 and is connected to the output end of the rotating motor 542 through the transmission mechanism. A gravity sensing plate 548 is installed on the upper surface of the bearing plate 547. The area of ​​the upper surface of the bearing plate 547 and the gravity sensing plate 548 is the same as the cross-sectional area of ​​the weighing box 541. The rotating motor 542, the second switching valve 545 and the gravity sensing plate 548 are all electrically connected to the control system 9.

[0068] To improve the workability and physical and mechanical properties of fluidized solidified soil, a certain amount of polymer additives are usually added. These additives can make the internal structure of the fluidized solidified soil present a network structure, thereby improving its tensile strength and durability. However, these additives are usually in powder form, and the amount of additives is not as large as that of the curing agent. Therefore, an additive weighing component 54 is selected to weigh the additives. The weighing process of the additive weighing component 54 is as follows: the control system 9 controls the second switch valve 545 to open, and then the additive is discharged from the additive box 51 and enters the gravity sensing plate 548 inside the weighing box 541. When the gravity sensing plate 548 senses that the additive has reached the preset weight, the second switch valve 545 closes, and the control system 9 controls the rotating motor 542 to rotate 180°, tilting the additive on the gravity sensing plate 548 and entering the mixing bin 1 through the discharge pipe 53.

[0069] Furthermore, the stirring device 6 includes a stirring shaft 61 and a variable frequency motor 62 electrically connected to the controller; the stirring shaft 61 is vertically arranged, one end of the stirring shaft 61 is located inside the mixing chamber 1 and is provided with a stirring rod 63 and a stirring blade 64, and the other end is located outside the mixing chamber 1 and is connected to a driven pulley 65; the variable frequency motor 62 is located outside the mixing chamber 1, and a driving pulley 66 is fixedly connected to the output shaft of the variable frequency motor 62, and the driven pulley 65 and the driving pulley 66 are driven by a belt.

[0070] Once a fixed amount of soil, water, curing agent, and additives are delivered into the mixing chamber 1, the control system 9 starts the variable frequency motor 62 to rotate. The variable frequency motor 62 drives the mixing shaft 61 to rotate through the driven pulley 65 and the driving pulley 66. The rotating mixing shaft 61 drives the mixing rod 63 and the mixing blades 64 to mix the soil, water, curing agent, and additives for a preset time to form a lightweight fluidized solidified soil.

[0071] Furthermore, the pre-storage silo 7 is located on one side below the mixing chamber 1. The top of the pre-storage silo 7 has a fluidized solidified soil inlet; the bottom of the mixing chamber 1 has a fluidized solidified soil outlet. The fluidized solidified soil inlet and outlet are connected by a fluidized solidified soil delivery pipe assembly 12. The fluidized solidified soil delivery pipe assembly 12 is equipped with a third switching valve 13 and a first gear pump 14, both electrically connected to the control system 9. By opening the third switching valve 13 and starting the first gear pump 14 through the control system 9, the prepared lightweight fluidized solidified soil is pumped from the mixing chamber 1 to the pre-storage silo 7, so that the mixing chamber 1 can proceed with the next operation. The pre-storage silo 7 pre-stores the lightweight fluidized solidified soil to meet construction needs.

[0072] Furthermore, the pumping device 8 includes a fluidized solidified soil pumping pipe 81, one end of which is connected to the pre-storage bin 7, and the other end of which is connected to a jetting head 82. A second gear pump 83 is installed in the middle of the fluidized solidified soil pumping pipe 81. When lightweight fluidized solidified soil construction is required at a designated location, the second gear pump 83 is activated through the control system 9, and the second gear pump 83 pumps out the lightweight fluidized solidified soil to achieve the construction.

[0073] The pre-storage chamber 7 is equipped with a fluidized solidified soil circulation assembly 15. The fluidized solidified soil circulation assembly 15 includes a circulation pipe 151, which is coiled around the outer wall of the pre-storage chamber 7. A third gear pump 152 is installed in the middle of the circulation pipe 151. The two ends of the circulation pipe 151 are connected to the top and bottom of the pre-storage chamber 7, respectively. The second gear pump 83 and the third gear pump 152 are both electrically connected to the control system 9.

[0074] In this embodiment, the volume of the pre-storage chamber 7 is much larger than that of the mixing chamber 1. Therefore, it is not suitable to use a traditional mixing device 6 to mix the lightweight fluidized solidified soil inside the pre-storage chamber 7. Thus, a fluidized solidified soil circulation component 15 is provided outside the pre-storage chamber 7. The fluidized solidified soil circulation component 15 circulates and pumps the lightweight fluidized solidified soil in the pre-storage chamber 7 to ensure that the lightweight fluidized solidified soil has a uniform texture and to avoid the lightweight fluidized solidified soil from settling and separating.

[0075] A wall-scraping assembly is provided on the pre-storage chamber 7. The wall-scraping assembly includes a scraper 16 and a lead screw motor 17 electrically connected to the control system 9. The lead screw motor 17 is located on the top of the pre-storage chamber 7. A rotating lead screw 18 is fixedly connected to the output end of the pre-storage chamber 7. The scraper 16 is located inside the pre-storage chamber 7. A lead screw nut 19 with a threaded engagement with the rotating lead screw 18 is provided at the center of the scraper 16. Rubber scraper rings 20 are provided around the perimeter of the scraper 16 to contact the inner wall of the pre-storage chamber 7. The rubber scraper rings 20 can not only make tight contact with the inner wall of the pre-storage chamber 7 to ensure clean scraping, but also have a soft texture and will not scratch the pre-storage chamber 7. A limiting post 21 is provided on the vertical protrusion inside the pre-storage chamber 7. A notch 22 with a sliding engagement with the limiting post 21 is provided at the same position on the scraper 16 and the rubber scraper ring 20. The wall scraping assembly is used to scrape off the lightweight fluidized solidified soil adhering to the inner wall of the pre-storage bin 7, preventing the lightweight fluidized solidified soil from adhering to the inner wall of the pre-storage bin 7 for a long time and ensuring the smooth transport of the lightweight fluidized solidified soil.

[0076] In summary, this invention proposes an automated mixing and conveying device for pre-mixed lightweight fluidized solidified soil. The aim is to solve existing problems through technological innovation, improve the preparation efficiency and construction quality of lightweight fluidized solidified soil, and promote its widespread application in civil engineering and construction. The device of this invention not only has advantages such as simple structure, convenient operation, stable performance, and strong adaptability, but also enables precise control of material dosage and uniform mixing of the mixture, providing strong technical support for the efficient preparation and high-quality construction of lightweight fluidized solidified soil.

Claims

1. An automated mixing and conveying device for premixed lightweight fluidized solidified soil, characterized in that, Includes mixing system, conveying system and control system; The mixing system includes a mixing bin, on which are connected a soil feeding module, a water inlet device, a curing agent feeding module, an additive adding module, and a mixing device, all of which are electrically connected to the control system. The conveying system includes a pre-storage bin and a pumping device electrically connected to the control system; The soil feeding module crushes and screens the soil and quantitatively delivers the processed soil to the mixing bin; the water inlet device quantitatively delivers water to the mixing bin; the curing agent feeding module quantitatively delivers curing agent to the mixing bin; the additive adding module quantitatively delivers additives to the mixing bin; and the mixing device mixes the soil, water, curing agent, and additives in the mixing bin. The pre-storage bin is connected to the mixing bin via a fluidized solidified soil conveying pipe assembly, and the pumping device is connected to the outlet end of the pre-storage bin; the soil feeding module includes a conveyor belt assembly, a crushing assembly, a screening cylinder assembly, and a first tubular screw weighing conveyor. The crushing assembly includes a feed hopper, a crushing disc is rotatably mounted at the bottom of the feed hopper, the crushing disc is driven to rotate by a motor, and a discharge guide plate is mounted below the crushing disc; the discharge port of the conveyor belt assembly is located at the top of the feed hopper. The screening cylinder assembly includes a driving component, a drum screen, and a collection plate disposed below the drum screen. The driving component drives the drum screen to rotate around its own axis. The drum screen is arranged at a horizontal inclination, and a drum screen inlet is provided on the high side of the drum screen. The top of the mixing silo is provided with multiple feeding ports; the outlets of the soil feeding module, water inlet device, curing agent feeding module and additive addition module are all connected to the mixing silo through one of the feeding ports. The discharge port of the conveyor belt assembly is connected to the top inlet of the feed hopper, the bottom outlet of the feed hopper is connected to the feed inlet of the drum screen, the discharge port of the collecting plate is connected to the feed inlet of the first tubular screw weighing conveyor, and the discharge port of the first tubular screw weighing conveyor is connected to the mixing bin through one of the feed interfaces. A first switching valve is provided at the bottom outlet of the feed hopper and the discharge port of the collection plate; the conveyor belt assembly, motor, drive component, first tubular screw weighing conveyor and the first switching valve are all electrically connected to the control system; The additive addition module includes an additive box located at the top of the mixing chamber. The top of the additive box is covered, and the bottom of the additive box has a discharge pipe. The bottom end of the discharge pipe is connected to the mixing chamber via a feed inlet. An additive weighing assembly is located in the middle of the discharge pipe. The additive weighing assembly includes a weighing box and a rotating motor mounted on the outer wall of the weighing box. The top and bottom of the weighing box each have a feed channel and a discharge channel connected to the discharge pipe, respectively. A second switching valve is located within the feed channel. Inside the weighing box, a rotating rod and a support plate are installed. One end of the rotating rod passes through the middle of the support plate and is fixedly connected to it. The other end passes through the weighing box and is connected to the output end of the rotating motor via a transmission mechanism. A gravity sensing plate is located on the upper surface of the support plate. The area of ​​the upper surfaces of the support plate and the gravity sensing plate is the same as the cross-sectional area of ​​the weighing box. The rotating motor, the second switching valve, and the gravity sensing plate are all electrically connected to the control system. The pumping device includes a fluidized solidified soil pumping pipe, one end of which is connected to the pre-storage bin, the other end of which is connected to a spray head, and a second gear pump is installed in the middle of the fluidized solidified soil pumping pipe. A fluidized solidified soil circulation assembly is installed outside the pre-storage bin. The fluidized solidified soil circulation assembly includes a circulation pipe, which is coiled around the outer wall of the pre-storage bin. A third gear pump is installed in the middle of the circulation pipe, and the two ends of the circulation pipe are connected to the top and bottom of the pre-storage bin, respectively. The second gear pump and the third gear pump are both electrically connected to the control system. The pre-storage chamber is equipped with a wall scraping assembly, which includes a scraper and a lead screw motor electrically connected to the control system. The lead screw motor is located at the top of the pre-storage chamber, and a rotating lead screw is fixedly connected to the output end of the pre-storage chamber. The scraper is located inside the pre-storage chamber, and a lead screw nut that is threadedly engaged with the rotating lead screw is located at the center of the scraper. Rubber scraper rings that contact the inner wall of the pre-storage chamber are located around the perimeter of the scraper. A limiting post is vertically protruding inside the pre-storage chamber. A notch that slides with the limiting post is located at the same position on both the scraper and the rubber scraper ring.

2. The automated mixing and conveying device for premixed lightweight fluidized solidified soil according to claim 1, characterized in that, The water inlet device includes a water inlet pipe, one end of which is connected to the mixing chamber through a feed inlet, and the other end of which is connected to a water source. A metering pump electrically connected to the control system is connected to the water inlet pipe.

3. The automated mixing and conveying device for premixed lightweight fluidized solidified soil according to claim 1, characterized in that, The curing agent feeding module includes a curing agent storage tank. The bottom outlet of the curing agent storage tank is connected to a second tubular screw weighing conveyor that is electrically connected to the control system. The outlet of the second tubular screw weighing conveyor is connected to the mixing chamber through a feeding interface.

4. The automated mixing and conveying device for premixed lightweight fluidized solidified soil according to claim 1, characterized in that, The stirring device includes a stirring shaft and a variable frequency motor electrically connected to the controller; The stirring shaft is vertically arranged, with one end located inside the mixing chamber and equipped with a stirring rod and stirring blades, and the other end located outside the mixing chamber and connected to a driven pulley. The variable frequency motor is located outside the mixing chamber, and a drive pulley is fixedly connected to the output shaft of the variable frequency motor. The driven pulley and the drive pulley are driven by a belt.

5. The automated mixing and conveying device for premixed lightweight fluidized solidified soil according to claim 1, characterized in that, The pre-storage silo is located on one side below the mixing silo, and the top of the pre-storage silo is provided with a fluidized solidified soil inlet; The bottom of the mixing chamber is equipped with a fluidized solidified soil outlet; The fluidized solidified soil inlet and outlet are connected by the fluidized solidified soil delivery pipe assembly, which is equipped with a third switching valve and a first gear pump electrically connected to the control system.

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