Shield construction slurry treatment device and method
By designing a mud treatment device for shield tunneling construction, and utilizing the combination of a mixing shaft and a filter cylinder, the problem of large particle impurities and caking during shield tunneling construction was solved. This achieved efficient mixing and filtration of the mud, reduced equipment failure rate and maintenance costs, and improved construction efficiency and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA RAILWAY NO 3 GRP CO LTD
- Filing Date
- 2026-03-02
- Publication Date
- 2026-05-01
AI Technical Summary
In existing technologies, the presence of large particles and lumps in the slurry used for tunnel boring machine (TBM) construction leads to a high failure rate of the TBM, increased equipment maintenance costs, and insufficient mixing results in large fluctuations in slurry viscosity, affecting construction efficiency and safety.
Design a mud treatment device for shield tunneling construction, including a mixing tank, a mixing component, a filtering component, and a liquid supply component. Through the combined use of the mixing shaft and the filter cylinder, the raw materials are fully mixed and filtered. The filter cylinder intercepts large particulate impurities, and the design of chemical agent spraying and mixing teeth ensures uniform mixing of the mud.
It effectively intercepts large particles of impurities, reduces equipment failure rate, improves mud quality stability, simplifies operation procedures, reduces costs, and improves construction efficiency and safety.
Smart Images
Figure CN121948804A_ABST
Abstract
Description
A device and method for treating slurry during tunnel boring machine (TBM) construction Technical Field
[0001] This application belongs to the technical field of shield tunneling mud treatment equipment, and more specifically, relates to a shield tunneling mud treatment device and method. Background Technology
[0002] In shield tunnel construction, slurry serves as a key construction medium, undertaking core functions such as lubricating the cutting tools, supporting the excavation face, carrying excavated soil, and balancing ground pressure. Its performance directly affects the tunneling efficiency of the shield machine, ground stability, and construction safety.
[0003] In existing technologies, mud preparation usually involves mixing bentonite and clay as the main components, supplemented by chemical additives (such as soda ash, CMC, etc.). In order to reduce costs, some projects add mud cake obtained by screening, filtration and dewatering shield tunnel waste mud to new mud at a ratio of 10%-30% to replace part of the bentonite.
[0004] However, raw materials such as bentonite, clay, and mud cake may contain large particles of impurities (gravel, sand, and fibrous impurities, etc.), which may scratch the shield machine's sealing system or block the mud circulation pipeline, increasing the equipment failure rate and maintenance costs. At the same time, during the mixing process of existing mixing equipment, the raw materials and water are difficult to fully hydrate and disperse, which easily forms local lumps, causing large fluctuations in mud viscosity and a decrease in slag carrying capacity, which in turn leads to problems such as shield machine cutterhead blockage or slurry discharge pipeline wear. Summary of the Invention
[0005] Based on the above-mentioned technical problems, this application provides a shield tunneling slurry treatment device and method to solve the technical problems of shield machine failure caused by large particulate impurities, caking and other factors in the slurry in the prior art.
[0006] One of the main objectives of this invention is to provide a shield tunneling slurry treatment device to solve the problem of shield machine failure caused by large particulate impurities and agglomeration in the slurry in the prior art. Another main objective is to provide a shield tunneling slurry treatment method to solve the problem of shield machine failure caused by large particulate impurities and agglomeration in the slurry in the prior art. To achieve the above objectives, one of the objectives of this invention is achieved as follows: A shield tunneling slurry treatment device includes: a mixing tank with a slurry outlet at its bottom; a mixing assembly rotatably disposed inside the mixing tank, with a power unit for driving the mixing assembly to rotate fixed on one side of the mixing tank; a filtering assembly including a filter cylinder, which is sleeved on the outside of the mixing assembly and rotatably connected to it; the mixing tank has an inlet and an outlet respectively at both ends that communicate with the interior of the filtering assembly; the interior of the filter cylinder forms a mixing space; and the exterior of the filter cylinder and the inner wall of the mixing tank form a mixing space; and a liquid supply assembly, one end of which passes through the side wall of the mixing tank and the opening of the filter cylinder and extends into the mixing space.
[0007] Furthermore, the stirring assembly includes two stirring shafts spaced apart, with each stirring shaft having its two ends rotatably connected to two side walls along the length of the stirring tank, and multiple stirring rods uniformly fixed on each stirring shaft, with the stirring rods on the two stirring shafts arranged alternately.
[0008] Furthermore, one end of each of the two stirring shafts extends outward from the mixing tank through the mixing chamber. The power unit includes two first gears, which are respectively fixedly sleeved on one end of each of the two stirring shafts located outside the mixing tank, and the two first gears mesh with each other. One end of one of the stirring shafts is fixedly equipped with a drive motor for driving the stirring shaft to rotate.
[0009] Furthermore, a toothed ring is fixed at the opening on one side of the filter cylinder, and a second gear is fixed on one of the stirring shafts, the second gear meshing with the toothed ring.
[0010] Furthermore, the inner wall of the mixing tank is rotatably provided with multiple rollers for supporting the filter cylinder.
[0011] Furthermore, a plurality of baffles are fixedly provided on the inner wall of the filter cylinder, and the plurality of baffles are arranged at intervals along the axial and circumferential directions of the filter cylinder.
[0012] Furthermore, a plurality of stirring teeth are fixed on the outer wall of the filter cylinder, and the stirring teeth are arranged at intervals along the axial and circumferential directions of the filter cylinder.
[0013] Furthermore, the filter cylinder is internally fitted with a spiral plate for moving the raw material from the inlet to the outlet.
[0014] Furthermore, the liquid supply assembly includes a water supply pipe for providing clean water and a liquid supply pipe for providing a premixed liquid chemical agent, and both the water supply pipe and the liquid supply pipe are provided with multiple nozzles at intervals.
[0015] The second objective of this invention is achieved as follows: a method for treating slurry during tunnel boring machine (TBM) construction, using the aforementioned TBM slurry treatment device, includes the following steps: a) feeding each raw material into the mixing space inside the filter cylinder through the feed inlet; b) opening the water supply pipe to spray clean water into the mixing space; c) starting the power unit, which drives the mixing assembly to mix the raw materials, while simultaneously driving the filter cylinder to rotate via a transmission structure. During the mixing process, large particles of impurities in the raw materials are intercepted by the filter cylinder and remain in the mixing space, while raw materials meeting the particle size requirements pass through the filter cylinder and enter the mixing space between the outside of the filter cylinder and the inner wall of the mixing tank; d) opening the liquid supply pipe to spray liquid chemical agents into the mixing space. Under the continuous mixing action of the mixing assembly and the rotation of the filter cylinder, the raw materials, clean water, and chemical agents are fully mixed; e) closing the liquid supply assembly and opening the slurry outlet to discharge the slurry, which has been fully mixed, filtered, and blended, from the slurry outlet at the bottom of the mixing tank; f) closing the slurry outlet, reopening the water supply pipe to clean the inside of the mixing tank, and simultaneously opening the discharge outlet to discharge large particles of impurities and clumps from the filter cylinder.
[0016] Compared with existing technologies, the beneficial effects of the shield tunneling mud treatment device and method provided in this application are as follows: 1. By setting up a filter cylinder in conjunction with a mixing component, large particulate impurities in the raw materials can be effectively intercepted while fully mixing the raw materials, preventing them from scratching the shield machine's sealing system or clogging the mud circulation pipeline, reducing equipment failure rate and maintenance costs, and reducing shield machine cutterhead blockage or slurry discharge pipeline wear problems; 2. By setting baffles on the inner wall of the filter cylinder to drive the attached raw materials to rotate, the raw materials fall back into the mixing flow for full mixing. The mixing teeth on the outer wall of the mixing cylinder stir the raw materials in the mixing space, further ensuring that the raw materials are fully mixed with water and chemical agents, and further ensuring the stability of mud performance; 3. By using the rotation of the mixing shaft, in conjunction with the transmission of the second gear and gear ring to drive the filter cylinder to rotate, there is no need to set up an additional power device to drive the filter cylinder to rotate, simplifying the device structure, reducing costs, and ensuring the synchronous operation of the filter cylinder and the mixing component, thereby improving processing efficiency. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 is a perspective view of a shield tunneling mud treatment device according to the present invention; Figure 2 is a cross-sectional view of one side of the shield tunneling mud treatment device according to the present invention; Figure 3 is a cross-sectional view of the other side of the shield tunneling mud treatment device according to the present invention; Figure 4 is a perspective view of the filter assembly according to the present invention; Figure 5 is a structural diagram of the mixing assembly according to the present invention.
[0019] Explanation of reference numerals in the attached drawings: 1. Mixing tank; 11. Tank body; 111. Feed inlet; 112. Discharge outlet; 113. Sludge outlet; 12. Tank cover; 13. Roller; 2. Mixing assembly; 21. Mixing shaft; 211. Second gear; 22. Mixing rod; 23. First gear; 3. Filter assembly; 31. Filter cylinder; 311. Gear ring; 312. Baffle; 313. Spiral plate; 314. Mixing teeth; 315. Through hole; 32. Mixing space; 33. Mixing space; 4. Liquid supply assembly; 41. Water supply pipe; 42. Liquid supply pipe; 43. Nozzle. Detailed Implementation
[0020] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.
[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.
[0025] Please refer to Figures 1 to 4. The following describes a shield tunneling slurry treatment device and method provided by an embodiment of this application. The shield tunneling slurry treatment device of the present invention includes a mixing tank 1, a mixing assembly 2, a filtering assembly 3, and a liquid supply assembly 4. The mixing tank 1 includes a tank body 11 and a cover 12. The tank body 11 is a U-shaped tank body with a hollow interior and an open top. The cover 12 is hinged to the tank body 11, allowing the tank body 11 to be opened or closed, thereby reducing noise or dust pollution. The tank body 11 has an inlet 111 and an outlet 112 at both ends along its length, and a mud outlet 113 at the bottom. The inlet 111 is used to receive raw materials (bentonite, clay, or mud cake, etc.) to be mixed and stirred, the outlet 112 is used to discharge large particles, and the mud outlet 113 is used to discharge the stirred slurry.
[0026] It should be noted that the feed inlet 111 can use the existing auger conveyor to quantitatively transport the raw materials into the mixing tank 1. The auger conveyor can adjust the conveying speed to better mix the raw materials. In addition, the mud outlet 113 can be connected to the existing storage tank through pipelines and pumps, and then the mud can be transported into the tunnel boring machine through the storage tank. This will not be elaborated further here.
[0027] The stirring assembly 2 is rotatably mounted inside the mixing tank 1. A power unit is fixed on one side of the mixing tank 1, which drives the stirring assembly 2 to rotate, thereby mixing the raw materials in the mixing tank 1. Specifically, the stirring assembly 2 includes two stirring shafts 21, the axial direction of which is parallel to the length direction of the mixing tank 1. The two stirring shafts 21 are horizontally spaced inside the mixing tank 1, and both ends of each stirring shaft 21 are rotatably connected to two side walls along the length direction of the mixing tank 1. Multiple stirring rods 22 are uniformly fixed on each stirring shaft 21, and the stirring rods 22 on the two stirring shafts 21 are arranged alternately.
[0028] The raw materials are mixed and stirred by two stirring shafts 21 and staggered stirring rods 22, which increases the stirring range and intensity, allowing the raw materials to be more thoroughly mixed within the stirring space 32. This reduces localized material clumping, ensures stable mud viscosity, improves the mud's slag-carrying capacity, and reduces problems such as shield machine cutterhead blockage or slurry discharge pipe wear.
[0029] In this embodiment, one end of each of the two stirring shafts 21 extends outward through the mixing tank 1. The power unit includes two first gears 23 and a drive motor (not shown in the figure). The two first gears 23 are respectively fixedly sleeved on the ends of the two stirring shafts 21 located outside the mixing tank 1, and the two first gears 23 mesh with each other. The output end of the drive motor is fixedly connected to one end of one of the stirring shafts 21 to drive the corresponding stirring shaft 21 to rotate. In practice, the drive motor drives one of the stirring shafts 21 to rotate, and the first gear 23 on that stirring shaft 21 rotates accordingly. Since the two first gears 23 mesh with each other, they drive the other stirring shaft 21 to rotate, realizing the synchronous and opposite rotation of the two stirring shafts 21.
[0030] In this embodiment, the filter assembly 3 includes a filter cylinder 31, which is a cylindrical body that is hollow inside and open at both ends. Multiple through holes 315 are provided on the side wall of the filter cylinder 31 for filtering the raw materials to effectively intercept large particles of impurities, prevent them from scratching the shield machine sealing system or clogging the mud circulation pipeline, and reduce the equipment failure rate and maintenance costs.
[0031] The filter cylinder 31 is rotatably disposed inside the mixing tank 1, and is sleeved on the outside of the mixing assembly 2 (it should be noted that the mixing assembly 2 is located at the lower part of the filter cylinder 31). Specifically, the openings at both ends of the filter cylinder 31 are rotatably connected to the two ends of the mixing tank 1, in other words, the filter cylinder 31 can roll along its own axis inside the mixing tank 1. The interior of the filter cylinder 31 forms a mixing space 32, and the exterior of the filter cylinder 31 forms a mixing space 33 between it and the inner wall of the mixing tank 1. The feed inlet 111 and the discharge outlet 112 are respectively connected to the interior of the filter cylinder 31 (through the openings at both ends of the filter cylinder 31), that is, the feed inlet 111 and the discharge outlet 112 are respectively connected to the mixing space 32, and the mud outlet 113 is connected to the mixing space 33. Preferably, multiple rollers 13 are rotatably disposed on the inner wall of the mixing tank 1 to support the filter cylinder 31, thereby providing support for the filter cylinder 31 and making the rotation of the filter cylinder 31 smoother.
[0032] The liquid supply assembly 4 extends into the mixing space 32 after passing through the side wall of the mixing tank 1 and the opening of the filter cylinder 31 at one end. Specifically, the liquid supply assembly 4 includes a water supply pipe 41, a liquid supply pipe 42, and multiple nozzles 43 spaced apart on the water supply pipe 41 and the liquid supply pipe 42. The water supply pipe 41 is used to supply clean water, and the liquid supply pipe 42 is used to supply premixed liquid chemical agents. In this way, clean water and liquid chemical agents are sprayed into the mixing space 32 through the multiple nozzles 43 on the water supply pipe 41 and the liquid supply pipe 42, so that the clean water and chemical agents can be more evenly distributed in the mixing space 32 and fully mixed with the raw materials.
[0033] During implementation, each raw material enters the stirring space 32 inside the filter cylinder 31 through the feed inlet 111. The liquid supply component 4 provides clean water and chemical agents to the stirring space 32. The power unit drives the stirring component 2 to rotate in the stirring space 32 to stir the raw materials. It should be noted that at this time, the filter cylinder 31 is driven. Large particles of impurities in the raw materials are intercepted and retained in the stirring space 32 by the filter cylinder 31. Raw materials that meet the particle size requirements pass through the filter cylinder 31 and enter the mixing space 33. Finally, the treated slurry is discharged from the slurry outlet 113.
[0034] It should be noted that existing technologies generally require an additional screening device to filter the raw materials before mixing and stirring. This not only increases the complexity of the entire mud treatment process but also requires specialized screening equipment, occupying additional space. Furthermore, operators need to perform material transfers between different devices, consuming significant manpower and time. In contrast, this invention integrates the filtration function into the mixing process by incorporating a filter cylinder 31, eliminating the need for a separate filtration step and greatly simplifying the operation. Operators only need to feed the raw materials directly into this device to complete the mixing, filtration, and blending in one step, reducing equipment investment and space occupation, while also reducing manual labor intensity and improving overall work efficiency, making the mud treatment process more convenient and efficient.
[0035] Preferably, a gear ring 311 is fixedly installed at the opening on one side of the filter cylinder 31, and a second gear 211 is fixedly installed on one of the stirring shafts 21, meshing with the gear ring 311. In implementation, the rotation of the stirring shaft 21 drives the second gear 211 fixed on the stirring shaft 21 to rotate. Since the second gear 211 meshes with the gear ring 311, it in turn drives the filter cylinder 31 to rotate synchronously. By utilizing the rotation of the stirring shaft 21, in conjunction with the transmission of the second gear 211 and the gear ring 311, the filter cylinder 31 is driven to rotate. This eliminates the need for an additional power device to drive the filter cylinder 31, simplifying the device structure and reducing costs. Simultaneously, it ensures the synchronous operation of the filter cylinder 31 and the stirring assembly 2, improving processing efficiency. Furthermore, the rotation of the filter cylinder 31 assists in stirring the raw materials during the stirring process of the stirring assembly 2, promoting material mixing.
[0036] Preferably, multiple baffles 312 are fixedly provided on the inner wall of the filter cylinder 31, and the multiple baffles 312 are arranged at intervals along the axial and circumferential directions of the filter cylinder 31. It should be noted that when the mud treatment operation begins, the raw material enters the lower region of the filter cylinder 31 from the feed inlet 111 of the device. At this time, the stirring assembly 2 located at the lower part of the filter cylinder 31 starts to operate and stirs the incoming raw material. During the stirring process, due to the gravity of the raw material itself and the local flow field characteristics generated by the stirring, some raw material will gradually deposit on the inner surface of the filter cylinder 31, which cannot be fully stirred and affects the filtration of the filter cylinder 31. As the filter cylinder 31 continues to rotate, the baffle 312 fixed inside the filter cylinder 31 will rotate with the filter cylinder 31, causing the attached raw material to rotate with the filter cylinder 31 to gradually approach or be located directly above the mixing component 2. At this time, due to the gravity of the raw material itself, these attached raw materials will detach from the inner wall of the filter cylinder 31 and fall back into the mixing flow of the mixing component 2, where they will be fully mixed with other raw materials. That is, by setting the baffle 312, it is beneficial to mix the raw materials more fully, avoid the formation of local clumps, and improve the quality of the mud.
[0037] A spiral plate 313 is fixedly installed inside the filter cylinder 31. The spiral plate 313 is used to move the raw material from the feed inlet 111 to the discharge outlet 112. In practice, after the raw material enters the stirring space 32 inside the filter cylinder 31, the spiral plate 313 rotates with the filter cylinder 31 to move the raw material from the feed inlet 111 to the discharge outlet 112. At the same time, the stirring assembly 2 stirs the raw material. That is, the setting of the spiral plate 313 helps the material to be transported and flowed in the stirring space 32, so that the material can be more evenly distributed in the stirring space 32 for mixing and avoids the accumulation of the material in the stirring space 32. At the same time, after the stirring is completed, large particles or clumps remain in the filter cylinder 31, and the spiral plate 313 can transport the large particles or clumps to the discharge outlet 112 located at the other end of the mixing tank 1 for discharge.
[0038] Preferably, a plurality of stirring teeth 314 are fixed on the outer wall of the filter cylinder 31. The stirring teeth 314 are arranged at intervals along the axial and circumferential directions of the filter cylinder 31, that is, the stirring teeth 314 are located within the mixing space 33. In practice, the filter cylinder 31 rotates, which in turn drives the plurality of stirring teeth 314 to rotate together with the filter cylinder 31, stirring the raw materials in the mixing space 33, so that the raw materials entering the mixing space 33 are further and fully mixed with water and chemical agents to ensure the stability of the mud performance.
[0039] In specific implementation of the shield tunneling mud treatment device of the present invention, the raw materials are first transported from the feed inlet 111 to the mixing space 32 inside the filter cylinder 31 by external equipment, such as a auger conveyor. At the same time, clean water is sprayed into the mixing space 32 through the water supply pipe 41 of the liquid supply component 4 and the nozzles 43 installed in the water supply pipe 41. Then, the power unit is started, and the drive motor of the power unit drives the mixing component 2 to rotate. At the same time, the filter cylinder 31 is driven to rotate synchronously through the second gear 211 and the gear ring 311. During the mixing process, large particles of impurities in the raw materials are intercepted and retained in the mixing space 32 by the filter cylinder 31, and the mud that meets the particle size requirements passes through the filter cylinder 31 and enters the mixing space 33. At the same time, during the mixing process, a pre-mixed liquid chemical agent is sprayed into the mixing space 32 through the liquid supply pipe 42 and multiple nozzles 43 on the liquid supply pipe 42, so that the chemical agent is fully mixed with the raw materials and clean water.
[0040] Furthermore, during the stirring process, multiple baffles 312 on the inner wall of the filter cylinder 31 rotate with the filter cylinder 31, causing the attached raw material to rotate to a position close to or directly above the stirring assembly 2. The raw material then detaches from the inner wall of the filter cylinder 31 due to its own gravity and falls back into the stirring flow to mix thoroughly with other raw materials. The spiral plate 313 fixed inside the filter cylinder 31 rotates with the filter cylinder 31, moving the raw material from the feed port 111 to the discharge port 112, so that the raw material can be more evenly distributed in the stirring space 32 for stirring and mixing.
[0041] This invention provides a method for treating slurry during tunnel boring machine (TBM) construction, using the aforementioned TBM slurry treatment device, comprising the following steps: a) feeding various raw materials into the mixing space 32 inside the filter cylinder 31 through the feed inlet 111; b) opening the water supply pipe 41 to spray clean water into the mixing space 32; c) starting the power unit, which drives the mixing assembly 2 to mix the raw materials, while simultaneously driving the filter cylinder 31 to rotate via a transmission structure. During the mixing process, large particles of impurities in the raw materials are intercepted by the filter cylinder 31 and remain in the mixing space 32, while raw materials meeting the particle size requirements pass through the filter cylinder 31 and enter the filter cylinder 31. d. The mixing space 33 between the outside and the inner wall of the mixing tank 1; d. The liquid supply pipe 42 is opened to spray liquid chemical agent into the mixing space 32. Under the action of continuous stirring of the stirring component 2 and rotation of the filter cylinder 31, the raw materials, water and chemical agent are fully mixed; e. The liquid supply component 4 is closed and the mud outlet 113 is opened to discharge the mud after being fully stirred, filtered and mixed from the mud outlet 113 at the bottom of the mixing tank 1; f. The mud outlet 113 is closed and the water supply pipe 41 is opened again to clean the inside of the mixing tank 1. At the same time, the discharge port 112 is opened to discharge large particles and clumps in the filter cylinder 31.
[0042] The shield tunneling mud treatment method of the present invention, through the above steps, realizes the integrated treatment of raw material stirring, filtering and mixing using a shield tunneling mud treatment device, effectively solving the problems of large particle impurities in raw materials and the difficulty in fully hydrating and dispersing raw materials with water in the prior art, thereby improving mud quality, shield tunneling efficiency and construction safety.
[0043] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present invention specification has recorded each combined embodiment and can support different combined embodiments.
[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A mud treatment device for shield tunneling construction, characterized in that, include: A mixing tank has a mud outlet at its bottom; a mixing assembly is rotatably disposed inside the mixing tank, and a power unit for driving the mixing assembly to rotate is fixed on one side of the mixing tank; a filtering assembly includes a filter cylinder, which is sleeved on the outside of the mixing assembly and rotatably connected to the mixing assembly; the two ends of the mixing tank are respectively provided with an inlet and an outlet communicating with the interior of the filtering assembly; the interior of the filter cylinder forms a mixing space, and the exterior of the filter cylinder and the inner wall of the mixing tank form a mixing space; a liquid supply assembly extends into the mixing space after passing through the side wall of the mixing tank and the opening of the filter cylinder at one end.
2. The shield tunneling mud treatment device according to claim 1, characterized in that, The stirring assembly includes two stirring shafts spaced apart. The two ends of each stirring shaft are rotatably connected to two side walls along the length of the stirring tank. Multiple stirring rods are uniformly fixed on each stirring shaft, and the stirring rods on the two stirring shafts are arranged alternately.
3. The shield tunneling mud treatment device according to claim 2, characterized in that, One end of each of the two stirring shafts extends outward from the mixing tank. The power unit includes two first gears, which are respectively fixedly sleeved on one end of each of the two stirring shafts located outside the mixing tank, and the two first gears mesh with each other. One end of one of the stirring shafts is fixedly equipped with a drive motor for driving the stirring shaft to rotate.
4. The shield tunneling mud treatment device according to claim 3, characterized in that, A toothed ring is fixed at the opening on one side of the filter cylinder, and a second gear is fixed on one of the stirring shafts, the second gear meshing with the toothed ring.
5. The shield tunneling mud treatment device according to claim 1, characterized in that, The inner wall of the mixing tank is provided with multiple rollers for supporting the filter cylinder.
6. The shield tunneling mud treatment device according to claim 1, characterized in that, Multiple baffles are fixedly provided on the inner wall of the filter cylinder, and the multiple baffles are arranged at intervals along the axial and circumferential directions of the filter cylinder.
7. The shield tunneling mud treatment device according to claim 1, characterized in that, Multiple stirring teeth are fixed on the outer wall of the filter cylinder, and the stirring teeth are arranged at intervals along the axial and circumferential directions of the filter cylinder.
8. The shield tunneling mud treatment device according to claim 1, characterized in that, The filter cylinder is equipped with a spiral plate inside for moving the raw material from the inlet to the outlet.
9. The shield tunneling mud treatment device according to claim 1, characterized in that, The liquid supply assembly includes a water supply pipe for providing clean water and a liquid supply pipe for providing a premixed liquid chemical agent, and both the water supply pipe and the liquid supply pipe are provided with multiple nozzles at intervals.
10. A method for treating slurry during shield tunneling construction, characterized in that, The shield tunneling slurry treatment device according to any one of claims 1-9 includes the following steps: a) feeding each raw material into the mixing space inside the filter cylinder through the feed inlet; b) opening the water supply pipe to spray clean water into the mixing space; c) starting the power unit, which drives the mixing component to mix the raw materials, and simultaneously driving the filter cylinder to rotate through the transmission structure. During the mixing process, large particles of impurities in the raw materials are intercepted by the filter cylinder and remain in the mixing space, while raw materials that meet the particle size requirements pass through the filter cylinder and enter the mixing space between the outside of the filter cylinder and the inner wall of the mixing tank; d) opening the liquid supply pipe to spray liquid chemical agents into the mixing space. Under the action of continuous mixing by the mixing component and rotation of the filter cylinder, the raw materials, clean water, and chemical agents are fully mixed; e) closing the liquid supply component and opening the slurry outlet to discharge the slurry that has been fully mixed, filtered, and blended from the slurry outlet at the bottom of the mixing tank; f) closing the slurry outlet, reopening the water supply pipe to clean the inside of the mixing tank, and simultaneously opening the discharge port to discharge large particles of impurities and clumps from the filter cylinder.