System and method for preparing fluidified solidified soil

Abstract

The application discloses a system and method for preparing fluidized solidified soil, which comprises a primary mud preparation device, a transition transfer device and a finished mud preparation device. The primary mud preparation device comprises a rack, a stirring bin, a transversely arranged stirring shaft, a hydraulic motor, a support member, a primary filter screen, a primary water supply pipe, a primary water supply flow meter, a discharge port and a chute plate. The transition transfer device comprises a mud transfer tank, a secondary filter screen, a mud transfer pump and a mud pipeline. The finished mud preparation device comprises a stirring barrel, an upper stirring device, a secondary weighing device, a secondary water supply pipe, a secondary water supply flow meter, a tertiary filter screen, a mud outlet barrel, a finished mud pump and a mud outlet pipeline. The application can improve the preparation efficiency, finished product quality and continuity of the fluidized solidified soil, and can ensure that the weight mixing ratio of raw soil and water reaches the expected target value.

Description

Technical Field

[0001] This invention relates to the field of fluidized solidified soil preparation technology, and particularly to a fluidized solidified soil preparation system and method. Background Technology

[0002] Fluidized solidified soil is a highly fluid, environmentally friendly material made by mixing raw materials such as construction waste soil and silt with water in a specific weight ratio and adding a solidifying agent. Due to significant differences in soil quality at different construction sites, the raw materials may contain impurities such as mud, sand, stones, and localized lumps. Existing fluidized solidified soil is typically prepared using a mixer, which has poor filtration efficiency for impurities, affecting the quality of the finished product and making it difficult to achieve the target mixing ratio of raw materials and water. Summary of the Invention

[0003] The purpose of this invention is to provide a fluidized solidified soil preparation system and method to solve the problems of poor finished product quality of fluidized solidified soil prepared by traditional mixers and the difficulty in achieving the target ratio of raw soil and water in the prepared fluidized solidified soil.

[0004] To address the aforementioned technical problems, this invention provides a fluidized solidified soil preparation system, comprising a primary slurry preparation device, a transitional transfer device, and a finished slurry preparation device, wherein:

[0005] A primary mud preparation device includes a frame and a mixing chamber with a top opening mounted on it, a horizontally rotating mixing shaft mounted inside the mixing chamber, a hydraulic motor connected to the horizontally rotating mixing shaft, the hydraulic motor being located outside the mixing chamber and mounted on a supporting member, a primary filter screen mounted at the top opening of the mixing chamber, a primary water supply pipe passing through the primary filter screen and connected to the mixing chamber and a primary water supply flow meter mounted on it, a discharge port mounted on the mixing chamber, and a chute plate located at the discharge port and mounted on the frame.

[0006] A transitional transfer device, located downstream of the primary mud preparation device, includes a mud transfer tank and a secondary filter screen thereon, with the discharge end of the chute plate aligned with the secondary filter screen, and a mud transfer pump installed in the mud transfer tank, the mud transfer pump being connected to a mud pipeline.

[0007] The finished mud preparation device, located downstream of the transition and transfer device, includes a mixing tank and an upper-mounted agitator thereon, a secondary weighing device located at the bottom of the mixing tank, a secondary water supply pipe connected to the mixing tank and a secondary water supply flow meter installed thereon, a mud pipeline connected to the mixing tank, a detachable tertiary filter screen located on the mixing tank, a mud outlet tank located at the tertiary filter screen connected to the mixing tank, a finished mud pump located in the mud outlet tank, and a mud outlet pipe located inside the mixing tank connected to the finished mud pump and extending out of the mixing tank.

[0008] Furthermore, in the fluidized solidified soil preparation system provided by the present invention, there are two horizontal stirring shafts in the primary slurry preparation device, and each horizontal stirring shaft is connected to a hydraulic motor via a coupling.

[0009] Furthermore, in the fluidized solidified soil preparation system provided by the present invention, the horizontal stirring shaft includes a shaft and a plurality of T-shaped blades spirally distributed thereon, and all the T-shaped blades are detachably connected to the shaft at the same tilt angle relative to the shaft.

[0010] Furthermore, in the fluidized solidified soil preparation system provided by the present invention, the secondary filter screen in the transition transfer device is a trough structure, and the two ends of the trough structure are rolled on the mud transfer pool by rollers.

[0011] Furthermore, in the fluidized solidified soil preparation system provided by the present invention, the mud transfer pump is installed in the mud transfer pool via a frame in the transition transfer device.

[0012] Furthermore, in the fluidized solidified soil preparation system provided by the present invention, there are two finished slurry preparation devices, the slurry pipeline is connected to the two mixing tanks through a slurry three-way valve, and the secondary water supply pipe is connected to the two mixing tanks through a water three-way valve.

[0013] Furthermore, in the fluidized solidified soil preparation system provided by the present invention, the mixing tank includes a frame and a tank wall connected to its outer facade, a bottom plate horizontally and sealed to the tank wall near the bottom of the tank wall, and a reinforcement structure located inside the tank wall below the bottom plate. The reinforcement structure includes, from bottom to top, a base frame, vertical members, and a transfer frame. The transfer frame is connected to the frame and the bottom plate, the base frame is connected to the frame and supported on the ground by the secondary weighing device, and multiple vertical members are evenly distributed and connected between the base frame and the transfer frame.

[0014] Furthermore, in the fluidized solidified soil preparation system provided by the present invention, the three-stage screen is located on the upper wall of the bottom plate in the finished slurry preparation device, and the bottom of the slurry outlet is lower than the bottom plate.

[0015] To address the aforementioned technical problems, the present invention also provides a method for preparing fluidized solidified soil, employing the aforementioned fluidized solidified soil preparation system, comprising:

[0016] Preparation of primary slurry for fluidized solidified soil: The raw soil containing impurities is filtered through a primary filter screen and then fed into the mixing chamber of the primary slurry preparation device. Water is supplied to the mixing chamber through a primary water supply pipe, and the weight of the water supplied to the mixing chamber is counted by a primary water supply flow meter. The raw soil containing impurities and water are added as raw materials according to the set initial weight ratio. The horizontal mixing shaft controlled by the hydraulic motor is used to mix the raw soil and water in the mixing chamber to form the primary slurry for fluidized solidified soil. The primary slurry for fluidized solidified soil prepared in the mixing chamber is discharged to the downstream transition transfer device through the discharge port via a chute plate.

[0017] Secondary filtration and transfer storage supply of mud: The secondary filter of the transfer unit receives the primary fluidized solidified soil mud discharged from the chute plate of the upstream primary mud preparation unit, performs a second impurity filtration, and stores it in the mud transfer tank. The impurities contained in the initial fluidized solidified soil mud are retained on the secondary filter. The primary fluidized solidified soil mud in the mud transfer tank is supplied to the downstream finished mud preparation unit through the mud transfer pump and the mud transfer pipeline.

[0018] Preparation of finished fluidized solidified soil slurry: The mixing tank of the finished slurry preparation device receives the primary fluidized solidified soil slurry supplied by the slurry transfer pump of the upstream transition transfer device through the slurry pipeline. The weight of the slurry supplied to the mixing tank is calculated by a secondary weighing device, and the weight of water and raw soil in the slurry in the mixing tank is calculated. Water is supplied to the mixing tank through a secondary water supply pipe, and the amount of water added is counted by a secondary water supply flow meter to ensure that the total water and soil in the slurry in the mixing tank reaches the target weight ratio. After the admixture is added to the mixing tank, the slurry, water and admixture in the mixing tank are stirred by the top-mounted agitator to form finished fluidized solidified soil slurry. The finished fluidized solidified soil slurry undergoes a third impurity filtration through a three-stage filter screen before flowing into the discharge tank. The finished fluidized solidified soil slurry in the discharge tank is pumped out to the target location in the construction area by the finished slurry pump.

[0019] Furthermore, the method for preparing fluidized solidified soil provided by the present invention further includes:

[0020] When two finished mud preparation devices are used, the mud pipeline is switched by the mud three-way valve, and the secondary water supply pipe is switched by the water three-way valve to supply the mud and water after secondary filtration in the mud transfer tank to one of the mixing tanks at the same time.

[0021] When the mud and water supplied in the current mixing tank meet the requirements or before mixing is performed, the mud pipeline is switched through the mud three-way valve, and the secondary water supply pipe is switched through the water three-way valve, so that the mud and water after secondary filtration in the mud transfer tank are simultaneously supplied to another mixing tank.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] The fluidized bed soil preparation system and method provided by this invention prepares primary fluidized bed soil slurry using a primary slurry preparation device, and firstly filters impurities in the raw soil through a primary filter screen before preparation. The primary fluidized bed soil slurry is then transferred and stored in a slurry transfer tank of a transitional transfer device, and secondly filtered through a secondary filter screen before storage to remove impurities. The primary fluidized bed soil slurry after the second impurity filtration, along with water, is used as raw material to prepare finished fluidized bed soil slurry using a finished slurry preparation device. Finally, the finished fluidized bed soil slurry is filtered through a tertiary filter screen to remove impurities of different particle sizes from the raw soil, thereby improving the quality of the raw soil and ultimately improving the quality of the finished fluidized bed soil.

[0024] The fluidized solidified soil preparation system and method provided by this invention, when using primary fluidized solidified soil slurry as raw material for preparing finished fluidized solidified soil slurry, calculates the weight of the slurry supplied to the mixing tank using a secondary weighing device, calculates the weight of water and raw soil in the slurry in the mixing tank, and supplies water to the mixing tank through a secondary water supply pipe and counts the amount of water supplied through a secondary water supply flow meter, so that the total amount of water and soil in the mixing tank reaches the final weight ratio. After adding admixtures to the mixing tank, the slurry, water and admixtures in the mixing tank are stirred by an upper-mounted agitator to form finished fluidized solidified soil slurry, thereby ensuring that the weight ratio of raw soil and water reaches the expected target value.

[0025] The fluidized bed soil preparation system and method provided by this invention improves the traditional mixer into a primary slurry preparation device and introduces a transitional transfer device and a finished slurry preparation device, forming a three-stage preparation process for fluidized bed soil. The primary slurry preparation device prepares the initial fluidized bed soil slurry, which is then discharged into the transitional transfer device, enabling continuous and uninterrupted preparation of the initial fluidized bed soil slurry. The primary fluidized bed soil slurry, after secondary filtration in the transitional transfer device, is supplied to the finished slurry preparation device, where water is added to prepare the finished fluidized bed soil slurry. The system uses algorithms such as two weighings at a secondary weighing station to calculate the weight of soil and water in the initial fluidized bed soil slurry supplied to the finished slurry preparation device in real time. The amount of water added is calculated based on the target weight ratio, and water is added through a secondary water supply pipe. The amount of water added is also recorded by a secondary water supply flow meter, enabling real-time adjustment of the soil-water weight ratio. This improves the preparation efficiency of fluidized bed soil, accelerates the preparation cycle, and achieves continuous preparation of fluidized bed soil. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of a fluidized solidified soil preparation system from one perspective;

[0027] Figure 2 This is a three-dimensional structural diagram of a fluidized solidified soil preparation system from another perspective;

[0028] Figure 3 yes Figure 2 A three-dimensional structural diagram of a fluidized solidified soil preparation system with the primary filter screen removed.

[0029] Figure 4 yes Figure 3 A three-dimensional structural diagram of a fluidized solidified soil preparation system from another perspective;

[0030] Figures 5 to 7 These are three-dimensional structural diagrams of the finished mud preparation device under different cross-sections;

[0031] Figure 8 This is a cross-sectional three-dimensional structural schematic diagram of a finished mud preparation device according to another embodiment;

[0032] Figure 9 This is a three-dimensional structural diagram of a horizontally positioned stirring shaft and its connection to a hydraulic motor;

[0033] Figure 10 This is a schematic diagram of the three-dimensional structure of a two-stage filter.

[0034] As shown in the figure:

[0035] Primary mud preparation device 100, frame 101, mixing chamber 102, horizontal mixing shaft 103, shaft 1031, T-shaped blade 1032, clamp 1033, hydraulic motor 104, support component 105, primary filter screen 106, primary water supply pipe 107, primary water supply flow meter 108, discharge port 109, chute plate 110, motor base 111, coupling 112;

[0036] Transition device 200, mud transfer tank 201, secondary filter screen 202, mud transfer pump 203, mud pipe 204, roller 205, push handle 206, frame 207, plate 208;

[0037] The finished mud preparation device 300 includes a mixing tank 301, a frame 3011, a tank wall 3012, a bottom plate 3013, an upper-mounted agitator 302, a secondary weighing device 303, a secondary water supply pipe 304, a secondary water supply flow meter 305, a tertiary filter screen 306, a discharge tank 307, a finished mud pump 308, a discharge pipe 309, a mud passage three-way valve 310, a water passage three-way valve 311, a reinforcing structure 312, a base frame 3121, vertical components 3122, a transfer frame 3123, a drain door 313, and a counterweight structure 314. Detailed Implementation

[0038] The present invention will now be described in detail with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0039] Please refer to Figures 1 to 4 This invention provides a fluidized solidified soil preparation system, including a primary slurry preparation device 100, a transitional transfer device 200, and a finished slurry preparation device 300. Wherein:

[0040] Please refer to Figures 1 to 4 The primary mud preparation device 100 includes a frame 101 and a mixing chamber 102 with a top opening mounted thereon, a horizontally rotating mixing shaft 103 within the mixing chamber 102, a hydraulic motor 104 connected to the horizontally rotating mixing shaft 103, the hydraulic motor 104 being located on a support member 105 on the outside of the mixing chamber 102, a primary filter screen 106 at the top opening of the mixing chamber 102, a primary water supply pipe 107 passing through the primary filter screen and connected to the mixing chamber 102, a primary water supply flow meter 108 mounted thereon, a discharge port 109 on the mixing chamber 102, and a chute plate 110 located at the discharge port 109 on the frame 101.

[0041] Please refer to Figure 3 , Figure 4 and Figure 9 To improve the mixing effect and efficiency, the primary mud preparation device 100 includes two horizontal mixing shafts 103, each connected to a hydraulic motor 104 via a coupling 112. The use of a hydraulic motor 104 enhances the high-torque mixing and cutting capability of the horizontal mixing shafts 103, effectively mixing, cutting, and scattering the raw soil into mud; therefore, a servo motor is not used. To improve the stability of the hydraulic motor 104 mounted on the support member 105, the motor mount 111 can be bolted to the support member 105.

[0042] Please refer to Figure 3 , Figure 4 and Figure 9 To facilitate maintenance of the horizontally positioned stirring shaft 103, in the primary slurry preparation device 100, the horizontally positioned stirring shaft 103 includes a shaft 1031 with multiple T-shaped blades 1032 spirally distributed on it. All the T-shaped blades 1032 are detachably connected to the shaft 1031 at the same tilt angle relative to the shaft 1031. The spirally distributed T-shaped blades 1032 can continuously and uniformly stir the raw materials in the mixing chamber 102, forming a "spiral upward-falling" circulating flow to avoid bottom accumulation. The T-shaped blades 1032 can increase the slurry area formed by mixing raw soil and water, improving the stirring effect. The T-shaped blades 1032 can be detachably connected to the shaft 1031 by clamps 1033, thus facilitating the replacement and maintenance of the T-shaped blades 1032.

[0043] Please refer to this carefully. Figures 1 to 4 and Figure 10 The transition transfer device 200 is located downstream of the primary mud preparation device 100, and includes a mud transfer tank 201 and a secondary filter screen 202 thereon. The discharge end of the chute plate 110 is aligned with the secondary filter screen 202. A mud transfer pump 203 is installed in the mud transfer tank 201, and the mud transfer pump 203 is connected to a mud pipe 204.

[0044] Please refer to this carefully. Figure 2 and Figure 10To improve the filtration and maintenance effect of the transition transfer device 200, the secondary filter 202 in the transition transfer device 200 is a trough structure, with both ends of the trough structure rolled onto the mud transfer tank 201 by rollers 205. The rollers 205 can roll the secondary filter 202 away from the end of the chute plate 110, facilitating the cleaning and maintenance of impurities trapped on the secondary filter 202 at the edge of the mud transfer tank 201. To improve water permeability, the bottom surface and the long sides of the trough structure are provided with a matrix of filter holes. To facilitate the insertion and removal of the secondary filter 202, a push handle 206 is provided on the outside of the rollers 205. To prevent the primary mud slurry of the fluidized solidified soil from splashing onto the secondary filter 202 outside the chute plate 110, a heightening baffle 207 is provided on the upper edge of the trough structure away from the chute plate 110.

[0045] Please refer to this carefully. Figure 3 To improve the stability of the slurry transfer pump 203 within the slurry transfer tank 201, the fluidized solidified soil preparation system provided in this embodiment of the invention includes a slurry transfer pump 203 mounted within the slurry transfer tank 201 via a frame 207 in the transition transfer device 200. To further improve the stability of the slurry pipe 204 within the slurry transfer tank 201, a plate 208 is provided on the top surface of the frame 207. The slurry pipe 204 and the slurry transfer pump 203 are fixedly connected to the plate 208, thereby enhancing the stability of the slurry transfer pump 203 and its connected components within the slurry transfer tank 201.

[0046] Please refer to Figures 1 to 8The finished mud preparation device 300, located downstream of the transition and transfer device 200, includes a mixing tank 301 and an upper-mounted agitator 302 thereon, a secondary weighing device 303 located at the bottom of the mixing tank 301, a secondary water supply pipe 304 connected to the mixing tank 301 and a secondary water supply flow meter 305 installed thereon, a mud pipe 204 connected to the mixing tank 301, a detachable tertiary filter screen 306 located on the mixing tank 301, a mud outlet tank 307 located at the tertiary filter screen 306 connected to the mixing tank 301, a finished mud pump 308 located in the mud outlet tank 307, and a mud outlet pipe 309 located inside the mixing tank 301 connected to the finished mud pump 308 and extending out of the mixing tank 301. The secondary weighing devices 303 can be four evenly distributed, and the average value is taken during weighing. The top-mounted agitator 302 includes a top frame 3021, a motor 3022 mounted on the top frame 3021, and a connecting agitator rod 3023. The agitator rod 3023 is connected to two sets of agitator blades 3024. The top frame 3021 is provided with an admixture inlet 3025 for easy installation of admixture equipment. The three-stage filter screen 306 can be installed on the mixing tank 301 via a long rod.

[0047] Please refer to this carefully. Figure 2 In order to achieve continuous preparation of fluidized solidified soil finished slurry and improve the preparation efficiency of fluidized solidified soil finished slurry, there are two finished slurry preparation devices 300. The slurry pipeline 204 is connected to the two mixing tanks 301 through a mud three-way valve 310, and the secondary water supply pipe 304 is connected to the two mixing tanks 301 through a water three-way valve 311.

[0048] Please refer to this carefully. Figures 5 to 7To improve the structural stability of the mixing tank 301, in the finished mud preparation device 300, the mixing tank 301 includes a frame 3011 and a tank wall 3012 connected to its outer facade. A bottom plate 3013 is horizontally and sealed to the bottom of the tank wall 3012. A reinforcing structure 312 is provided below the bottom plate 3013 and located inside the tank wall 3012. The reinforcing structure 312 includes, from bottom to top, a base frame 3121, vertical members 3122, and a transition frame 3123. The transition frame 3123 is connected to the frame 3011 and the bottom plate 3013. The base frame 3121 is connected to the frame 3011 and supported on the ground by the secondary weighing device 303. Multiple vertical members 3122 are evenly distributed and connected between the base frame 3121 and the transition frame 3123. The structural strength of the barrel wall 3012 and the bottom plate 3013 is improved by the frame 3011, and the supporting force of the mixing barrel 301 is improved by the reinforcement structure 312, so as to prevent the mixing barrel 301 from deforming when it is supported on the bottom surface by the secondary weighing device 303.

[0049] Please refer to this carefully. Figure 8 To further improve the stability of the mixing tank 301, in the finished slurry preparation device 300, a reinforcing structure 312 can be covered inside the tank wall 3012 below the bottom plate 3013, and concrete can be poured to form a counterweight structure 314. This counterweight structure 314 improves the stability of the mixing tank 301 when the upper-mounted agitator 302 stirs the raw materials inside, preventing the risk of overturning. To facilitate the finished slurry pump 308 to extract the prepared fluidized solidified soil slurry through the discharge pipe 309, the three-stage filter screen 306 can be removed, allowing the mixing tank 301 and the discharge tank 307 to be fully connected. Secondary filtration can also filter impurities in the raw soil, improving the quality of the fluidized solidified soil slurry.

[0050] Please refer to this carefully. Figures 5 to 6 To facilitate the flow of the finished fluidized bed slurry from the mixing tank 301 to the discharge tank 307, and to facilitate the clean extraction of the finished fluidized bed slurry by the finished slurry pump 308, the fluidized bed preparation system provided in this embodiment of the invention has the following configuration: in the finished slurry preparation device 300, the three-stage mesh 306 is located on the tank wall 3012 above the bottom plate 3013, and the bottom of the discharge tank 307 is lower than the bottom plate 3013. For easy wastewater discharge, a wastewater discharge door 313 can be provided at the bottom of the discharge tank 307.

[0051] Please refer to Figures 1 to 6 This invention also provides a method for preparing fluidized solidified soil, using the fluidized solidified soil preparation system described in the above embodiments, comprising:

[0052] Step S1, Preparation of primary slurry for fluidized solidified soil:

[0053] The raw soil containing impurities is filtered through a primary filter screen 106 and then fed into the mixing chamber 102 of the primary slurry preparation device 100. Water is supplied to the mixing chamber 102 through a primary water supply pipe 107, and the weight of the water supplied to the mixing chamber 102 is recorded by a primary water supply flow meter 108. The raw soil containing impurities and water are added as raw materials according to a set initial weight ratio. The horizontal mixing shaft 103, controlled by a hydraulic motor 104, mixes the raw soil and water in the mixing chamber 102 to form a fluidized solidified primary slurry. The fluidized solidified primary slurry prepared in the mixing chamber 102 is discharged through the discharge port 109 and then discharged downstream to the transfer device 200 via a chute plate 110. The discharge port 109 may even have valves or other gate components. When the horizontal mixing shaft 103 is performing the mixing operation, the gate components at the discharge port 109 are closed, and they are opened during discharge.

[0054] Step S2, secondary filtration and transfer storage of mud:

[0055] The secondary filter 202 of the transition transfer device 200 receives the primary fluidized solidified soil slurry discharged from the chute plate 110 of the upstream primary slurry preparation device 100. After a second impurity filtration, it is stored in the slurry transfer tank 201, and the impurities contained in the initial fluidized solidified soil slurry are retained on the secondary filter screen [filter tank]. The primary fluidized solidified soil slurry in the slurry transfer tank 201 is supplied to the downstream finished slurry preparation device 300 through the slurry transfer pump 203 and its connected slurry pipeline 204.

[0056] Step S3, Preparation of finished fluidized solidified soil slurry:

[0057] The mixing tank 301 of the finished mud preparation device 300 receives the primary fluidized solidified soil mud supplied by the mud transfer pump 203 of the upstream transition transfer device 200 through the mud pipeline 204. The weight of the mud supplied to the mixing tank 301 is calculated by the secondary weighing device 303, and the weight of water and raw soil in the mud within the mixing tank 301 is calculated. Water is then supplied to the mixing tank 301 through the secondary water supply pipe 304, and the amount of water added is recorded by the secondary water supply flow meter 305, ensuring the mixing... The total water and soil volume in the mixing tank 301 reaches the target weight ratio. After the admixture is added to the mixing tank 301, the mud, water, and admixture in the mixing tank 301 are stirred by the top-mounted agitator 302 to form a fluidized solidified soil finished mud slurry. After the fluidized solidified soil finished mud slurry undergoes a third impurity filtration through a three-stage filter screen 306, it flows into the discharge tank. The finished fluidized solidified soil finished mud slurry in the discharge tank is pumped out to the target location in the construction area by the finished mud slurry pump 308. The total water volume in the mixing tank 301 = the primary water volume added to the primary fluidized solidified soil mud + the secondary water supply volume.

[0058] The primary mud preparation device 100, the intermediate transfer device 200, and the finished mud preparation device 300 can be controlled by a control box equipped with a programmable logic controller (PLC) or similar controller, which will execute corresponding actions and calculations. For example, the PLC is used to control the hydraulic motor 104, the mud transfer pump 203, the top-mounted agitator 302, the finished mud pump 308, the primary water supply flow meter 108, the secondary water supply flow meter 305, and the secondary weighing device 303, and to perform corresponding calculations.

[0059] The fluidized bed soil preparation system and method provided in this invention prepares a primary fluidized bed soil slurry using a primary slurry preparation device 100. Before preparation, the slurry is filtered through a primary filter 106 to remove impurities from the raw soil. During the preparation process, the raw soil may contain impurities smaller than those on the primary filter 106 due to being agitated and broken by a horizontal stirring shaft 103. The primary fluidized bed soil slurry is then transferred and stored in a slurry transfer tank 201 of a transition transfer device 200. Before storage, the impurities in the primary fluidized bed soil slurry are filtered through a secondary filter 202. The primary fluidized bed soil slurry after the second impurity filtration is then used as raw material along with water to prepare a finished fluidized bed soil slurry using a finished product slurry preparation device 300. Finally, the impurities in the finished fluidized bed soil slurry are filtered through a tertiary filter 306 for a third filtration. This process removes impurities of different particle sizes from the raw soil step by step, improving the quality of the raw soil and thus the quality of the finished fluidized bed soil. The filter holes of the primary filter 106, secondary filter 202, and tertiary filter 306 are progressively smaller to achieve triple filtration of the raw soil.

[0060] The fluidized bed soil preparation system and method provided in this invention, when using the primary fluidized bed soil slurry as raw material for preparing the finished fluidized bed soil slurry, calculates the weight of the primary fluidized bed soil slurry supplied to the mixing tank 301 using a secondary weighing device 303, calculates the weight of water and raw soil in the primary fluidized bed soil slurry in the mixing tank 301, supplies water to the mixing tank 301 through a secondary water supply pipe 304, and counts the amount of water supplied through a secondary water supply flow meter 305, so that the total amount of water and soil in the mixing tank 301 reaches the final weight ratio. After adding an admixture to the mixing tank 301, the slurry, water, and admixture in the mixing tank 301 are stirred by an upper-mounted agitator 302 to form the finished fluidized bed soil slurry, thereby ensuring that the weight ratio of raw soil and water reaches the expected target value.

[0061] The fluidized bed solidification soil preparation system and method provided in this invention improves a traditional mixer into a primary slurry preparation device 100, and introduces a transitional transfer device 200 and a finished product slurry preparation device 300, forming a three-stage preparation process for fluidized bed solidification soil. The primary slurry for fluidized bed solidification soil is prepared by the primary slurry preparation device 100 and then discharged into the transitional transfer device 200, achieving continuous and uninterrupted preparation of primary slurry for fluidized bed solidification soil. The primary slurry for fluidized bed solidification soil, after secondary filtration within the transitional transfer device 200, is then supplied to the finished product slurry preparation device 300. After water is added to the slurry preparation device 300, the finished fluidized solidified soil slurry is prepared. The weight of soil and water in the primary slurry of fluidized solidified soil supplied to the slurry preparation device 300 is calculated in real time by algorithms such as two weighings before and after the secondary weighing device 303. The amount of water added is calculated according to the target weight ratio. Water is added through the secondary water supply pipe 304 and the amount of water added is counted by the secondary water supply flow meter 305. This realizes the real-time adjustment of the weight ratio of soil and water, which improves the preparation efficiency of fluidized solidified soil, speeds up the preparation cycle of fluidized solidified soil, and realizes the continuous preparation of fluidized solidified soil.

[0062] The fluidized solidified soil preparation system and method provided in this invention use a finished slurry pump 308, a slurry outlet pipe 309 and a subsequent connecting conveying pipe to pump the finished fluidized solidified soil slurry from the outlet tank 307 to the target location in the construction area, thereby realizing the real-time backfilling application and continuous operation of the finished fluidized solidified soil slurry.

[0063] The method for preparing fluidized solidified soil provided in this embodiment of the invention may include:

[0064] When two finished mud preparation devices 300 are used, the mud pipeline 204 is switched by the mud three-way valve 310, and the secondary water supply pipe 304 is switched by the water three-way valve 311, so that the mud and water after secondary filtration in the mud transfer tank 201 are supplied to one of the mixing tanks 301 at the same time.

[0065] When the mud and water supplied in the current mixing tank 301 meet the requirements or before mixing is performed, the mud pipeline 204 is switched through the mud three-way valve 310, and the secondary water supply pipe 304 is switched through the water three-way valve 311, so that the mud and water after secondary filtration in the mud transfer tank 201 are simultaneously supplied to another mixing tank 301.

[0066] By switching between the two finished mud preparation devices 300, the preparation efficiency and continuity of fluidized solidified soil finished mud are improved. Specifically, the switching of the mud circuit three-way valve 310 and the water circuit three-way valve 311 can be controlled by PLC to switch the raw material supply to different mixing tanks 301. For example, when one mixing tank 301 is full, the supply can be switched to the other mixing tank 301.

[0067] This invention is not limited to the specific embodiments described above. Obviously, the embodiments described above are only a part of the embodiments of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of this invention are within the scope of protection of this invention. Those skilled in the art can make other modifications and variations to this invention. Therefore, if these modifications and variations of this invention fall within the scope of the claims of this invention, then this invention also intends to include these modifications and variations.

Claims

1. A fluidized solidified soil preparation system, characterized in that, It includes a primary mud preparation unit, a transition and transfer unit, and a finished mud preparation unit, wherein: A primary mud preparation device includes a frame and a mixing chamber with a top opening mounted on it, a horizontally rotating mixing shaft mounted inside the mixing chamber, a hydraulic motor connected to the horizontally rotating mixing shaft, the hydraulic motor being located outside the mixing chamber and mounted on a supporting member, a primary filter screen mounted at the top opening of the mixing chamber, a primary water supply pipe passing through the primary filter screen and connected to the mixing chamber and a primary water supply flow meter mounted on it, a discharge port mounted on the mixing chamber, and a chute plate located at the discharge port and mounted on the frame. A transitional transfer device, located downstream of the primary mud preparation device, includes a mud transfer tank and a secondary filter screen thereon, with the discharge end of the chute plate aligned with the secondary filter screen, and a mud transfer pump installed in the mud transfer tank, the mud transfer pump being connected to a mud pipeline. The finished mud preparation device, located downstream of the transition and transfer device, includes a mixing tank and an upper-mounted agitator thereon, a secondary weighing device located at the bottom of the mixing tank, a secondary water supply pipe connected to the mixing tank and a secondary water supply flow meter installed thereon, a mud pipeline connected to the mixing tank, a detachable tertiary filter screen located on the mixing tank, a mud outlet tank located at the tertiary filter screen connected to the mixing tank, a finished mud pump located in the mud outlet tank, and a mud outlet pipe located inside the mixing tank connected to the finished mud pump and extending out of the mixing tank.

2. The fluidized solidified soil preparation system according to claim 1, characterized in that, In the primary mud preparation device, there are two horizontal stirring shafts, and each horizontal stirring shaft is connected to a hydraulic motor via a coupling.

3. The fluidized solidified soil preparation system according to claim 1, characterized in that, In the primary mud preparation device, the horizontal stirring shaft includes a shaft and a plurality of T-shaped blades spirally distributed thereon, and all the T-shaped blades are detachably connected to the shaft at the same tilt angle relative to the shaft.

4. The fluidized solidified soil preparation system according to claim 1, characterized in that, In the transition and transfer device, the secondary filter screen is a trough structure, and the two ends of the trough structure are rolled on the mud transfer tank by rollers.

5. The fluidized solidified soil preparation system according to claim 1, characterized in that, In the aforementioned transfer device, the mud transfer pump is installed within the mud transfer tank via a frame.

6. The fluidized solidified soil preparation system according to claim 1, characterized in that, The finished mud preparation device consists of two parts. The mud pipeline is connected to the two mixing tanks through a mud passage three-way valve, and the secondary water supply pipe is connected to the two mixing tanks through a water passage three-way valve.

7. The fluidized solidified soil preparation system according to claim 1, characterized in that, In the finished mud preparation device, the mixing tank includes a frame and a tank wall connected to its outer facade. A bottom plate is horizontally and sealed to the tank wall near the bottom of the tank wall. A reinforcing structure is provided below the bottom plate and located inside the tank wall. The reinforcing structure includes, from bottom to top, a base frame, vertical members, and a transfer frame. The transfer frame is connected to the frame and the bottom plate. The base frame is connected to the frame and supported on the ground by the secondary weighing device. The vertical members are multiple and evenly distributed between the base frame and the transfer frame.

8. The fluidized solidified soil preparation system according to claim 7, characterized in that, In the finished mud preparation device, the three-stage screen is located on the upper wall of the bottom plate, and the bottom of the discharge tank is lower than the bottom plate.

9. A method for preparing fluidized solidified soil, characterized in that, The fluidized solidified soil preparation system according to any one of claims 1-8 comprises: Preparation of primary slurry for fluidized solidified soil: The raw soil containing impurities is filtered through a primary filter screen and then fed into the mixing chamber of the primary slurry preparation device. Water is supplied to the mixing chamber through a primary water supply pipe, and the weight of the water supplied to the mixing chamber is counted by a primary water supply flow meter. The raw soil containing impurities and water are added as raw materials according to the set initial weight ratio. The horizontal mixing shaft controlled by the hydraulic motor is used to mix the raw soil and water in the mixing chamber to form the primary slurry for fluidized solidified soil. The primary slurry for fluidized solidified soil prepared in the mixing chamber is discharged to the downstream transition transfer device through the discharge port via a chute plate. Secondary filtration and transfer storage supply of mud: The secondary filter of the transfer unit receives the primary fluidized solidified soil mud discharged from the chute plate of the upstream primary mud preparation unit, performs a second impurity filtration, and stores it in the mud transfer tank. The impurities contained in the initial fluidized solidified soil mud are retained on the secondary filter. The primary fluidized solidified soil mud in the mud transfer tank is supplied to the downstream finished mud preparation unit through the mud transfer pump and the mud transfer pipeline. Preparation of finished fluidized solidified soil slurry: The mixing tank of the finished slurry preparation device receives the primary fluidized solidified soil slurry supplied by the slurry transfer pump of the upstream transition transfer device through the slurry pipeline. The weight of the slurry supplied to the mixing tank is calculated by a secondary weighing device, and the weight of water and raw soil in the slurry in the mixing tank is calculated. Water is supplied to the mixing tank through a secondary water supply pipe, and the amount of water added is counted by a secondary water supply flow meter to ensure that the total water and soil in the slurry in the mixing tank reaches the target weight ratio. After the admixture is added to the mixing tank, the slurry, water and admixture in the mixing tank are stirred by the top-mounted agitator to form finished fluidized solidified soil slurry. The finished fluidized solidified soil slurry undergoes a third impurity filtration through a three-stage filter screen before flowing into the discharge tank. The finished fluidized solidified soil slurry in the discharge tank is pumped out to the target location in the construction area by the finished slurry pump.

10. The method for preparing fluidized solidified soil according to claim 9, characterized in that, include: When two finished mud preparation devices are used, the mud pipeline is switched by the mud three-way valve, and the secondary water supply pipe is switched by the water three-way valve to supply the mud and water after secondary filtration in the mud transfer tank to one of the mixing tanks at the same time. When the mud and water supplied in the current mixing tank meet the requirements or before mixing is performed, the mud pipeline is switched through the mud three-way valve, and the secondary water supply pipe is switched through the water three-way valve, so that the mud and water after secondary filtration in the mud transfer tank are simultaneously supplied to another mixing tank.

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