Bidirectional in-situ curing stirring equipment

Abstract

The utility model provides bidirectional in-situ curing stirring equipment, which relates to the technical field of underground construction mechanical equipment and comprises a mounting bottom plate, an extension arm, at least two stirring heads, an oil way system and a conveying pipeline system, the mounting bottom plate and the stirring heads are connected together through the extension arms, the two to three stirring heads are uniformly and symmetrically arranged at the bottom end of the in-situ curing stirring equipment according to a certain angle, and the oil path system provides power for the hydraulic motor to drive the stirring heads to rotate and stir. The staggered-layer stirring device has the advantages that the staggered-layer stirring effect of the stirring blades is achieved through two-way rotation of the two stirring shafts, the rotating speed of the stirring head is monitored and controlled, stirring of a curing agent and an in-situ soil body can be more uniform through the nozzle structure and the arrangement position, the construction efficiency can be improved, and the construction cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of underground construction machinery and equipment, in particular to a bidirectional in-situ solidification mixing device. Background Art

[0002] Shallow solidification technology is an efficient foundation treatment method. Its core concept is to add specific curing agents at specific depths and areas and improve the engineering performance of the soil layer on the site through mechanical mixing. In this process, commonly used curing agents such as cement, quicklime, special curing agents, fly ash, etc. play a key role. These curing agents can undergo complex physical and chemical reactions with the particles in the soil layer, prompting the formation of a strong and stable structure between the soil particles. In this way, the strength and stability of the soil are significantly improved, providing the foundation bearing capacity that meets the design requirements for the construction of various foundation treatment projects. In addition, this foundation treatment technology has the advantages of simple operation, efficient construction, and low cost. Therefore, it has been widely used in engineering practice.

[0003] The following problems need to be solved during the use of this technical equipment and construction method:

[0004] 1. In the current application of mixing equipment, a major challenge is that its mixing blades are difficult to ensure that the soil and the solidified material are completely and evenly mixed during the mixing process. The mixing blades of existing mixing equipment are mostly single-layer structures, and the blade structure is simple and uses unidirectional rotation mixing. The disturbance of the soil during mixing is insufficient, and it is difficult to ensure that the soil and the solidified material are evenly mixed, making it difficult for the reinforcement effect to meet the design requirements, affecting the uniformity and reliability of the reinforcement effect.

[0005] 2. The existing curing agent nozzle has defects in its structure and position design. The curing agent nozzle is generally located at the root of the mixing head and adopts a circular nozzle. The curing agent cannot reach the effective mixing range when spraying, and no relevant protection is provided. This defect makes the nozzle easy to get clogged during the mixing operation and makes it difficult to spray the curing agent evenly. Once the nozzle is clogged, the curing agent cannot be accurately injected into the ground according to the preset flow rate and flow rate, which directly affects the soil solidification effect and poses a potential threat to the overall engineering construction. Therefore, optimizing the structure and position of the curing agent nozzle and ensuring that it can run smoothly during the mixing operation is an important measure to ensure the quality of engineering construction.

[0006] 3. The current mixing construction technology cannot control the mixing times of the mixing blades of the equipment structure, and the existing technical means and equipment cannot accurately measure the real-time rotation speed of the mixing head. This technical defect may lead to uneven mixing and uneven spraying of the curing agent during the mixing operation, that is, the mixing construction quality of the soil and the curing agent is difficult to meet the design requirements. Utility Model Content

[0007] In view of the characteristics of existing bidirectional in-situ solidification mixing equipment and the technical problems it faces, the utility model provides a novel bidirectional in-situ solidification mixing equipment. The equipment structure realizes the staggered mixing effect of bidirectional rotation of mixing blades through two mixing shafts, and uses a hydraulic flow meter to monitor the rotation speed of the mixing head. The appropriate nozzle arrangement position and nozzle structure are conducive to the uniform mixing of the curing agent and the in-situ soil.

[0008] For the purpose of this utility model, the following technical solutions are adopted:

[0009] A bidirectional in-situ curing mixing device comprises a mounting base, an extension arm, at least two mixing heads and an oil circuit system; the upper end of the extension arm is fixedly connected to the mounting base; a plurality of mixing heads are arranged at intervals along the circumferential direction at the lower end of the extension arm; each mixing head comprises a mixing fixed part, a bidirectional rotation drive assembly, a first mixing rotating part and a second mixing rotating part; the mixing fixed part is arranged at the lower end of the extension arm; a plurality of fixed mixing blades are arranged at intervals along the circumferential direction on the outer periphery of the mixing fixed part; the bidirectional rotation drive assembly is arranged on the mixing fixed part, the bidirectional rotation drive assembly is connected to the first mixing rotating part and the second mixing rotating part respectively, and the mixing fixed part, the first mixing rotating part and The second stirring rotating part is coaxially arranged; the bidirectional rotation drive assembly is used to drive the first stirring rotating part and the second stirring rotating part to rotate in opposite directions; a plurality of first stirring blades are arranged at intervals along the circumferential direction on the outer circumference of the first stirring rotating part, and a plurality of second stirring blades are arranged at intervals along the circumferential direction on the outer circumference of the second stirring rotating part, and the fixed stirring blades, the first stirring blades and the second stirring blades are arranged in a staggered manner to achieve the effect of mutually cutting the soil body; a nozzle is arranged on the inner side of at least one of the fixed stirring blades in each stirring head; the oil circuit system provides power for the bidirectional rotation drive assembly to drive the stirring head to perform a rotating stirring action, and at the same time, the number of rotations is converted and recorded by the amount of oil flowing through. The equipment can increase the stirring intensity and stirring uniformity through multiple stirring heads, and further improve the stirring capacity by realizing mutual cutting through the fixed stirring blades, the first stirring blades and the second stirring blades, and the number of rotations of the stirring head can be recorded through the oil circuit system, and the mixing quality of the curing agent and the soil body in situ can be guaranteed through the construction rotation data control, and finally, the specially arranged nozzle is not easy to be blocked during the mixing operation, thereby ensuring the quality of the project.

[0010] Preferably, the mixing fixed part is a fixed support, the fixed support is fixedly arranged at the lower end of the extension arm, and the fixed mixing blades are arranged on the outer peripheral wall of the fixed support at intervals in the circumferential direction; the first mixing rotating part includes a first rotating shaft and a first rotating shell; the first rotating shaft is connected to the bidirectional rotating drive assembly through a first transmission part; the first rotating shell is fixedly connected to the first rotating shaft; a plurality of the first mixing blades are arranged on the outer peripheral wall of the first rotating shell at intervals in the circumferential direction; the second mixing rotating part includes a second rotating shaft and a second rotating shell; the second rotating shaft is connected to the bidirectional rotating drive assembly through a second transmission part, the second rotating shell is fixedly connected to the second rotating shaft, and a plurality of the second mixing blades are arranged on the outer peripheral wall of the second rotating shell at intervals in the circumferential direction; the second rotating shell rotates in opposite directions to the first rotating shell, and the first mixing blade and the second mixing blade realize the staggered mixing function. The two mixing shafts are respectively connected to the two rotating shells, and the first mixing blades and the second mixing blades respectively arranged on the two rotating shells cut and mix the soil mutually during the operation, thereby improving the mixing quality and efficiency of the solidified soil.

[0011] Preferably, the second rotating shell is located between the fixed support and the first rotating shell; the end of the first rotating shell is provided with end blades arranged at intervals along the circumferential direction; the bottom surface of the first rotating shell is provided with a cover plate; the cover plate is provided with a plurality of ridges along the diameter; the ridges protrude from the cover plate by 3 to 5 cm. The cover plate closes the rotating shell, and the protruding ridges on the cover plate play an auxiliary stirring role and a structural reinforcement role.

[0012] Preferably, the first stirring blade, the second stirring blade and the fixed stirring blade each include a vertical plate and at least one horizontal plate; the horizontal plate is connected to the outer peripheral wall of the rotating shell through the vertical plate; the horizontal plate on the first stirring blade and the second stirring blade is at an angle of 15° to 30° with the tangent direction of the rotating shell, the horizontal plate on the fixed stirring blade is horizontally arranged with the tangent direction of the rotating shell, and the horizontal plates on the first stirring blade, the second stirring blade and the fixed stirring blade are arranged in staggered layers in a direction perpendicular to the rotating shell. Multiple groups of stirring blades can fully stir the original soil, the stirring blade and the fixed stirring blade adopt a vertical plate and a horizontal plate combination structure, the angle of the horizontal plate ensures the stirring efficiency, the horizontal plates of each blade adopt a staggered structure, the staggered order can be arbitrarily adjusted according to the requirements of the reinforcement operation, the staggered structure can achieve a mutual shearing effect during the stirring process, and the structure of the multi-layer horizontal plate can obtain more stirring times under the condition of bidirectional rotation, so that the curing agent and the soil are mixed more evenly.

[0013] Preferably, the nozzle is arranged on the inner side of the vertical plate of the fixed stirring blade, and the nozzle of each nozzle is in the shape of an isosceles trapezoid, and the nozzle gradually decreases in diameter from the inside to the outside. The nozzle is respectively provided with a horizontal slit nozzle and a vertical slit nozzle, or a circular nozzle is provided at the end of the nozzle. Through the above structure, the slit nozzle on the umbrella-shaped nozzle is more conducive to forming a better atomization effect when the curing agent is sprayed out; the nozzle is hidden in the inner side of the fixed stirring blade, which can avoid the nozzle from being blocked due to excessive soil pressure during the sinking and lifting process, and ensure the continuous and stable output of the curing agent material and high-pressure gas.

[0014] Preferably, the first rotating shaft is an inner rotating rod, the second rotating shaft is an outer rotating rod, the second rotating shaft is a hollow structure, and the second rotating shaft is sleeved on the outer peripheral wall of the first rotating shaft; the first rotating shaft and the second rotating shaft are coaxially arranged and can rotate relative to each other; the first rotating shaft is connected to the first rotating shell through the connecting section 1, and the second rotating shaft is connected to the second rotating shell through the connecting section 2; the bidirectional rotation drive assembly is used to provide rotational power for the first rotating shaft and the second rotating shaft. The above structure realizes the reverse rotation of the first stirring blade and the second stirring blade through the connection of the connecting section and the rotating shell, thereby achieving the purpose of staggered shear stirring.

[0015] Preferably, the bidirectional rotation drive assembly includes a single hydraulic motor. When driven by a single hydraulic motor, two driving gears are arranged on the driving shaft of the hydraulic motor, one of which is directly engaged with a driven gear connected to a rotating shaft to realize transmission, and the other driving gear is engaged with a driven gear connected to another rotating shaft through a reversing gear to realize transmission, so that the two rotating rods rotate in opposite directions.

[0016] Preferably, the bidirectional rotation drive assembly includes two hydraulic motors. When driven by two hydraulic motors, a driving gear is provided on the driving shafts of the two hydraulic motors. The two driving gears are respectively engaged with the driven gear connected to the first rotating shaft and the driven gear connected to the second rotating shaft to realize transmission, so that the two rotating shafts rotate in opposite directions.

[0017] Preferably, the oil circuit system includes an oil inlet valve, an oil outlet valve, a control valve and a hydraulic flow meter; the oil inlet valve and the oil outlet valve are respectively arranged on the extension arm, the oil inlet valve is connected to the oil inlet part of the control valve through an oil inlet pipe, the hydraulic flow meter is connected to the port 1 of the control valve through an oil pipe, and the hydraulic flow meter is connected to the bidirectional rotation drive assembly of each mixing head through a first driving oil pipe, the bidirectional rotation drive assembly of each mixing head is connected to the port 2 of the control valve through a second driving oil pipe, and the oil outlet of the control valve is connected to the oil outlet valve through an oil outlet pipe. The oil inlet pipe and the oil outlet pipe are responsible for the circulation of the hydraulic system oil circuit, and the control valve is used to change the direction of oil inlet and outlet to change the mixing direction of the mixing head. The first driving oil pipe and the second driving oil pipe are connected to the hydraulic motor at the end of the oil circuit system, wherein the hydraulic flow meter can convert the rotation speed of the mixing head through the flow change of the hydraulic oil, and adjust the construction time of the mixing head up and down movement by real-time monitoring of the rotation speed of the mixing head, thereby ensuring that the mixing times of the curing agent and the soil body meet the design requirements.

[0018] Preferably, it also includes a feeding backstage and a construction carrier; the feeding backstage is used for curing and stirring to provide curing agent and auxiliary high-pressure gas to the nozzle; a connecting plate is provided on the mounting base plate, and a pin hole is provided on the connecting plate, and the mounting base plate is fixedly connected to the construction carrier by passing a pin shaft through the pin hole.

[0019] In summary, the advantages of the utility model are:

[0020] 1) The bidirectional in-situ solidification mixing equipment structure of the present invention utilizes the bidirectional mixing function, and realizes the mutual shearing of soil and uniform mixing effect between adjacent blades by staggering the two rotating mixing blades and the fixed mixing blades. This structural design enables the curing agent and the in-situ soil to be more fully and evenly mixed, significantly improving the mixing uniformity and construction efficiency.

[0021] 2) The control valve can accurately control the rotation direction of the mixing head, and combined with the real-time monitoring function of the flow meter, the mixing times of the mixing head can be accurately monitored and controlled. Based on these data, the operator can accurately control the construction parameters to ensure that the mixing operations in each construction area meet the design quality requirements and improve the quality controllability and reliability of the overall engineering construction.

[0022] 3) According to the construction process requirements, different numbers and structures of hydraulic motors can be designed to drive the mixing head. This design can ensure that the power requirements of the construction can be met even when the single operation area is large. The reasonable design of the position and structure of the curing agent nozzle can effectively prevent the nozzle from being blocked and ensure that the curing agent is sprayed more evenly.

[0023] 4) During the construction process, providing high-pressure gas through the gas channel can effectively reduce the resistance during the mixing process, which is not only conducive to the mixing operation, but also helps the smooth flow and uniform mixing of the curing agent in the soil, thereby improving the project quality and construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a front view of the structure of a bidirectional in-situ curing and mixing equipment according to an embodiment of the present utility model.

[0025] Figure 2 This is a front view of the structure of the bidirectional in-situ curing and mixing equipment according to the second embodiment of the utility model.

[0026] Figure 3 This is a front view of the structure of the bidirectional in-situ curing and mixing equipment according to the third embodiment of the utility model.

[0027] Figure 4 This is a front view of a single-sided stirring head structure according to a first embodiment of the utility model.

[0028] Figure 5 This is a front view of the single-sided stirring head structure of the second embodiment of the utility model.

[0029] Figure 6 This is a front view of the single-sided stirring head structure of embodiment 3 of the present utility model.

[0030] Figure 7 This is a side view of a single-sided stirring head structure according to a first embodiment of the present utility model.

[0031] Figure 8 This is a side view of the single-sided stirring head structure of the second embodiment of the utility model.

[0032] Fig. 9 This is a side view of the single-sided stirring head structure of embodiment 3 of the present utility model.

[0033] Fig.10 This is a cross-sectional view of the stirring head structure of the utility model.

[0034] Fig.11 This is a schematic diagram of the structure of the dual hydraulic motor of the utility model.

[0035] Fig.12 This is a schematic diagram of the structure of a single hydraulic motor of the utility model.

[0036] Fig.13 This is a schematic diagram of the structure of the fixed stirring blade of the utility model.

[0037] Fig.14 This is a schematic diagram of the rotary blade structure of the utility model.

[0038] Fig.15 This is a schematic diagram of the structure of the injection pipe nozzle of the utility model.

[0039] Fig.16 This is a schematic diagram of the nozzle structure of the injection pipeline of the utility model.

[0040] Fig.17 This is a construction schematic diagram of the utility model.

[0041] Description of reference numerals:

[0042] 1. Mounting base plate; 11. Pin shaft; 12. Connecting plate; 13. Pin hole; 2. Extension arm; 21. Rib plate; 22. Fixed support; 3. Mixing head; 311. First mixing blade; 312. Second mixing blade; 32. Fixed mixing blade; 331. Vertical plate; 332. Horizontal plate; 333. Reinforcement rib; 34. End cutter head; 351. First rotating shaft; 352. Second rotating shaft; 361. First rotating shell; 3612. Connecting section 1; 362. Second rotating shell; 3622. Connecting section 2; 37. Cover plate; 38. Edge plate; 39. Hydraulic motor; 391. Driving gear; 392. Driven gear; 393. Reversing gear ; 4. Oil circuit system; 41. Oil inlet valve; 42. Oil outlet valve; 43. Control valve; 44. Hydraulic flow meter; 451. Oil inlet pipe; 452. Oil outlet pipe; 461. First drive oil pipe; 462. Second drive oil pipe; 5. Delivery pipeline system; 50. Mixing area; 51. Channel one; 52. Channel two; 53. Nozzle; 531. Nozzle; 54. Horizontal slit nozzle; 55. Vertical slit nozzle; 56. Circular nozzle; 6. Feeding backstage; 61. Feeding pipe; 62. Air supply pipe; 7. Construction carrier. DETAILED DESCRIPTION

[0043] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0044] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0045] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] Embodiment 1

[0048] Combine the following Figure 1 , Figure 4 , Figure 7 , Fig.10 , Fig.11 , Figure 13~Figure 17 The utility model is further explained.

[0049] This project case involves a storage facility construction project in an inland river and lake area. Soft soil layers are widely distributed in the project site. This part of the soft soil layer is directly exposed to the surface in some areas, and its significant characteristics include high water content, low bearing capacity, and high compressibility. The soil layer is dark brown, composed of a mixture of clay particles and peat materials, rich in humus and plant debris, soft texture, delicate touch, and smooth cut surface. At the top of the peat layer, there are a small amount of fine sand particles mixed, and the whole is in a saturated, semi-plastic state. In order to ensure the stable operation of various heavy construction machinery (such as pile drivers) in the construction of storage facilities, as well as the safety and reliability of future storage facilities, it is necessary to carry out targeted foundation reinforcement treatment on the soft soil layer in the site. The reinforcement treatment depth is designed to be 3.5m. In view of the high water content characteristics of the peat layer, we chose the wet grouting and high-pressure gas assisted construction method. The grouting material is PO 42.5 ordinary Portland cement, and 120kg of cement is added to each cubic meter of peat soil to achieve the designed curing effect.

[0050] like Figure 1As shown, the bidirectional in-situ curing mixing equipment used in this embodiment includes a mounting base plate 1, an extension arm 2, a mixing head 3, an oil circuit system 4 and a conveying pipeline system 5; the upper end of the extension arm 2 is fixedly connected to the mounting base plate 1; this embodiment adopts two mixing heads 3, which are symmetrically arranged on both sides of the lower end of the extension arm 2, with an angle of 130°; each mixing head 3 includes a mixing fixed part, a bidirectional rotation drive component, a first mixing rotating part and a second mixing rotating part; the mixing fixed part is arranged at the lower end of the extension arm 2; a plurality of fixed mixing blades 32 are arranged on the outer periphery of the mixing fixed part in a circumferentially spaced arrangement; the bidirectional rotation drive component is arranged on the mixing fixed part, and the bidirectional rotation drive component is respectively connected to the first mixing rotating part and the second mixing rotating part, and the mixing fixed part, the first mixing rotating part and the second mixing rotating part are coaxially arranged; the bidirectional rotation drive The component is used to drive the first stirring rotating part and the second stirring rotating part to rotate in opposite directions; a plurality of first stirring blades 311 are arranged at intervals along the circumferential direction on the outer periphery of the first stirring rotating part, and a plurality of second stirring blades 312 are arranged at intervals along the circumferential direction on the outer periphery of the second stirring rotating part, and the fixed stirring blades 32, the first stirring blades 311 and the second stirring blades 312 are arranged in an offset manner to achieve the effect of mutually cutting the soil; a nozzle 53 is arranged on the inner side of at least one fixed stirring blade 32 in each stirring head 3, and the oil circuit system 4 provides power for the bidirectional rotation drive component to drive the stirring head 3 to perform a rotational stirring action, and at the same time converts the number of rotations by the amount of flowing oil and records it; the conveying pipeline system 5 is used to arbitrarily switch the conveying medium (convey cement slurry and high-pressure gas) and make the conveying medium (convey cement slurry and high-pressure gas) spray out from the nozzle 53. The equipment can increase the mixing intensity and mixing uniformity through two mixing heads 3, and further improve the mixing capacity by fixing the mixing blade 32, the first mixing blade 311 and the second mixing blade 312 to achieve mutual cutting, and the number of rotations of the mixing head can be recorded through the oil circuit system 4, and the mixing quality of the curing agent and the soil in situ can be guaranteed through the construction rotation data control. Finally, through the cooperation of the conveying pipeline system 5 and the nozzle 53, it is not easy to be blocked during the mixing operation, thereby ensuring the quality of the project.

[0051] like Figure 1 and Fig.17 As shown, the mounting base plate 1 is connected to the excavator arm through a pin shaft 11, a connecting plate 12 and a pin hole 13. The excavator model is at least 250 or above. The excavator is used to control the bidirectional in-situ solidification mixing equipment structure to mix the solidified soil vertically up and down.

[0052] like Figure 1As shown, the extension arm 2 is a hollow structure, which effectively reduces the deadweight of the equipment, and a rib plate 21 is arranged at the installation position of the bottom plate 1 for reinforcement. The total length of the extension arm 2 and the mixing head is 5m, which can ensure that the effective reinforcement depth meets the design requirements; the mixing fixing part is a fixed support 22, which is located at the bottom of the extension arm 2. There are two fixed supports 22 and they are symmetrically arranged. The operating projection size of the bidirectional in-situ curing mixing equipment structure is 1300mm×800mm; the fixed mixing blades 32 are arranged on the outer circumference of the disk at the end of the fixed support 22 and are evenly arranged, as shown in FIG. Figure 7 As shown, four groups of fixed stirring blades 32 are arranged on the fixed support 22 on each stirring head 3 .

[0053] like Figure 1 , Figure 4 and Figure 7 As shown, in this embodiment, the first stirring rotating part includes a first rotating shaft 351 and a first rotating shell 361; the first rotating shaft 351 is transmission-connected to the bidirectional rotating drive assembly through a first transmission part; the first rotating shell 361 is fixedly connected to the first rotating shaft 351; four groups of first stirring blades 311 are arranged on the outer peripheral wall of the first rotating shell 361 at equal intervals along the circumferential direction; the second stirring rotating part includes a second rotating shaft 352 and a second rotating shell 362; the second rotating shaft 352 is transmission-connected to the bidirectional rotating drive assembly through a second transmission part, the second rotating shell 362 is fixedly connected to the second rotating shaft 352, and four groups of second stirring blades 312 are arranged on the outer peripheral wall of the second rotating shell 362 at equal intervals along the circumferential direction; the second stirring blade 312 is located between the fixed stirring blade 32 and the first stirring blade 311; the second rotating shell 362 and the first rotating shell 361 rotate in opposite directions, and enable the first stirring blade 311 and the second stirring blade 312 to achieve a staggered stirring function. The end of the first rotating shell 361 is provided with three groups of end blades 34 arranged at equal intervals along the circumferential direction, and the end blades 34 protrude 4 cm from the surface of the first rotating shell 361; the bottom surface of the first rotating shell 361 is provided with a cover plate 37; two mutually perpendicular ridges 38 are arranged along the diameter of the cover plate 37; the ridges 38 protrude 3 cm from the surface of the cover plate 37. The cover plate 37 closes the rotating shell, and the protruding ridges 38 on the cover plate 37 play an auxiliary stirring role and a structural strengthening role. The two stirring shafts are respectively connected to the two rotating shells, and the first stirring blades 311 and the second stirring blades 312 respectively arranged on the two rotating shells and the end blades 34 at the end of the stirring head 3 mutually cut and stir the soil during the operation, thereby improving the stirring effect and efficiency of the solidified soil.

[0054] like Figure 4 , Figure 7 , Fig.13 and Fig.14As shown, the first stirring blade 311, the second stirring blade 312 and the fixed stirring blade 32 all include a vertical plate 331 and a horizontal plate 332. Each blade is provided with a layer of horizontal plate 332. The horizontal plates 332 of the fixed stirring blade 32 and the first stirring blade 311 are arranged on the inner side of the second stirring blade 312, and the three types of blades achieve a staggered effect; the middle part of the horizontal plate 332 is connected to the vertical plate 331 and is reinforced with a reinforcing rib 333. The horizontal plates 332 of the first stirring blade 311 and the second stirring blade 312 are at an angle of 25° to the tangent direction of the circular rotating shell. The horizontal plate 332 of the fixed stirring blade 32 is arranged on the inner side of the second stirring blade 312. The plate 332 is horizontal to the tangent direction of the circular rotating shell; the adjacent stirring blades and the fixed stirring blades 32 are arranged in upper and lower layers, and multiple groups of stirring blades can fully stir the original soil. The stirring blades and the fixed stirring blades 32 adopt a combined structure of a vertical plate 331 and a horizontal plate 332. The angle of the horizontal plate 332 ensures the stirring efficiency. The horizontal plates 332 of each blade adopt a staggered structure. The staggered order can be adjusted arbitrarily according to the requirements of the reinforcement operation. The staggered structure can achieve a mutual shearing effect during the stirring process, so that the curing agent and the soil are mixed more evenly.

[0055] like Fig.11 As shown, in this embodiment, the first rotating shaft 351 is an inner rotating rod, the second rotating shaft 352 is an outer rotating rod, the second rotating shaft 352 is a hollow structure, and the second rotating shaft 352 is sleeved on the outer peripheral wall of the first rotating shaft 351; the first rotating shaft 351 and the second rotating shaft 352 are coaxially arranged and can rotate relative to each other; the first rotating shaft 351 is connected to the first rotating shell 361 through the connecting section 1 3612, and the second rotating shaft 352 is connected to the second rotating shell 362 through the connecting section 2 3622; the bidirectional rotation drive assembly is used to provide rotational power for the first rotating shaft 351 and the second rotating shaft 352. The above structure realizes the reverse rotation of the first stirring blade 311 and the second stirring blade 312 through the connection of the connecting section and the rotating shell, thereby achieving the purpose of staggered shear stirring. In this embodiment, two hydraulic motors 39 are used in a single mixing head 3 to respectively drive the first rotating shaft 351 and the second rotating shaft 352 to rotate, and the driving gears 391 on the driving shafts of the two hydraulic motors 39 are respectively meshed with the driven gears 392 on the first rotating shaft 351 and the second rotating shaft 352, so that the two rotate in opposite directions, thereby achieving the purpose of bidirectional mixing.

[0056] like Fig.10As shown, the oil circuit system 4 includes an oil inlet valve 41, an oil outlet valve 42, a control valve 43 and a hydraulic flow meter 44; the oil inlet valve 41 and the oil outlet valve 42 are respectively arranged on the extension arm 2, the oil inlet valve 41 is connected to the oil inlet part of the control valve 43 through an oil inlet pipe 451, the hydraulic flow meter 44 is connected to port 1 of the control valve 43 through an oil pipe, and the hydraulic flow meter 44 is connected to the bidirectional rotation drive component of each stirring head 3 through a first driving oil pipe 461, the bidirectional rotation drive component of each stirring head 3 is connected to port 2 of the control valve 43 through an oil pipe through a second driving oil pipe 462, and the oil outlet of the control valve 43 is connected to the oil outlet valve 42 through an oil outlet pipe 452. The above structure is responsible for the circulation of the hydraulic system oil circuit through the oil inlet pipe 451 and the oil outlet pipe 452, and uses the control valve 43 to change the inlet and outlet oil directions and thus change the stirring direction of the stirring head. The first drive oil pipe 461 and the second drive oil pipe 462 are connected to the hydraulic motor 39 at the end of the oil circuit system 4, wherein the hydraulic flow meter 44 can convert the rotation speed of the stirring head 3 through the flow change of the hydraulic oil, and adjust the up and down operation time by real-time monitoring of the rotation speed of the stirring head 3, thereby ensuring that the mixing times of the curing agent and the soil meet the design requirements.

[0057] like Figure 1 , Figures 15-17 As shown, the conveying pipeline system 5 includes channel 1 51 and channel 2 52; channel 1 51 and channel 2 52 can be used to convey one or more of curing agent powder, curing agent slurry or high-pressure gas according to different construction requirements. High-pressure gas can reduce the stirring resistance during stirring, and also help to evenly spread the curing agent. In this embodiment, wet construction auxiliary jet is adopted, channel 1 51 is for cement slurry to pass through; channel 2 52 is connected to the air supply pipe 62 of the external feeding backstage 6, which is responsible for transporting auxiliary high-pressure gas to assist stirring; the lower ends of the two channels extend to the bottom of the outer side of the mixing head 3 respectively, and are connected and merged at the bottom of the outer side of the mixing head 3 to form a mixing area 50; each mixing head 3 is provided with a nozzle 53, and the nozzle 53 is arranged on the inner side of the vertical plate 331 of the fixed stirring blade 32, and each nozzle 53 is connected with the mixing area 50 through a branch channel, and the angle between two adjacent nozzles 53 is the same as the angle between two adjacent mixing heads 3.

[0058] like Fig.16 As shown in (a), the nozzle 531 of each nozzle 53 is in the shape of an isosceles trapezoid, and the nozzle 531 gradually decreases in diameter from the inside to the outside, and a horizontal slit nozzle 54 and a vertical slit nozzle 55 are respectively provided on the nozzle 531. Through the above structure, the slit nozzle on the umbrella-shaped nozzle 53 is more conducive to forming a better atomization effect when the curing agent is sprayed out; the nozzle 53 is hidden in the inner side of the fixed stirring blade 32, which can avoid the nozzle being blocked due to excessive soil pressure during the sinking and lifting process, and ensure the continuous and stable output of the curing agent material and high-pressure gas.

[0059] like Fig.17As shown, it also includes a feeding backstage 6 and a construction carrier 7, which are connected to the conveying pipeline system 5 through a feeding pipe 61 and an air supply pipe 62. The feeding backstage 6 provides curing agent and auxiliary high-pressure gas for curing and stirring; the installation base plate 1 is fixedly connected to the construction carrier 7 by passing the pin shaft 11 through the pin hole 13.

[0060] like Fig.17 As shown, the construction method of the bidirectional in-situ solidification mixing equipment in this embodiment is as follows:

[0061] (a) Before construction, the area to be cured shall be marked out and divided into construction areas. If there are areas with large cross-sectional changes, the treatment blocks shall be adjusted accordingly to facilitate construction.

[0062] (b) The structure of the in-situ curing and mixing equipment is fixed to the front end of an excavator or other construction carrier 7 through a connecting plate 12, a pin shaft 11 and a pin hole 13; the valves, controllers and oil pipes in the oil system 4 that drive the mixing head 3 to rotate are connected in sequence and communicated with the hydraulic function system of the construction carrier 7; at the same time, the conveying pipeline system 5 is connected to the feeding backstage 6 through a feeding pipe 61 and an air supply pipe 62 to provide curing agent and auxiliary high-pressure gas for curing and mixing.

[0063] (c) After the construction equipment is in place, the feeding stage 6 starts to deliver cement slurry through the feeding pipe 61, and at the same time, the feeding stage 6 starts to provide high-pressure gas for solidification mixing through the gas supply pipe 62. When the cement slurry and the high-pressure gas are delivered to the mixing head 3, the mixing construction starts.

[0064] (d) During the on-site mixing construction process, according to the moisture content of the original soil on site and the type of curing agent, a vertical up-and-down mixing and curing treatment method is adopted. The mixing equipment is vertically inserted into the original soil for mixing. The first mixing blade 311 and the second mixing blade 312 on the mixing head 3 rotate in forward and reverse directions, while the fixed mixing blade 32 on the mixing head 3 remains stationary. The three sets of blades arranged at intervals achieve the effect of staggered mixing during the mixing operation. During the construction, the mixing is gradually deepened and the curing material and high-pressure gas are continuously sprayed until the curing design depth is reached. In order to ensure the mixing effect at the bottom, the advancement speed of the mixing equipment structure should be appropriately slowed down near the bottom, and it should stay at the bottom for at least 10 seconds, and then the reverse rotation and lifting operation should be carried out until the mixing head 3 is raised to the surface to complete the mixing operation.

[0065] (e) Move to the next work location and repeat construction step (d), ensuring that the overlap width between the two work areas is not less than 5 cm during the construction process.

[0066] (f) After the solidification construction is completed, the surface of the solidification area is compacted, leveled and maintained using engineering machinery to improve the bearing capacity of the foundation in the solidification area.

[0067] Embodiment 2

[0068] Combine the following Figure 2 , Figure 5 , Figure 8 , Fig.10 , Figure 12~Figure 17 The utility model is further explained. The engineering background in this embodiment is a planned wind power project in a coastal reclamation site. After the reclamation is completed, it will naturally dry and settle for two years, and the surface is relatively flat. The site survey results show that there is a thick silt layer distributed in the site. This layer of silt has the characteristics of high water content, low strength and high compressibility, which poses a challenge to engineering construction. The silt in some areas is directly exposed on the surface, which seriously affects the construction of heavy machinery. In order to meet the foundation bearing capacity requirements of the construction site, it is now necessary to carry out shallow foundation treatment on the soft soil layer within 4m below the surface of the site. The shallow solidification adopts dry construction, and sprays high-pressure gas to assist mixing. The curing agent material uses KD curing agent, and it is designed to add 100kg of curing agent to each cubic meter of soft soil.

[0069] The structure of the bidirectional in-situ curing and mixing equipment used in this embodiment is similar to that in the first embodiment, except that:

[0070] The reinforcement depth in this project is 4m, so the total length of the extension arm 2 and the mixing head 3 of the proposed mixing equipment structure needs to be 6m, and the maximum operating depth can reach 5m; the proposed two-way in-situ solidification mixing equipment structure is equipped with three mixing heads 3 at the bottom, the angle between each mixing head 3 is 140° and they are evenly and symmetrically arranged, and the number of nozzles 53 is three, and the side length of the operating projection triangle of the two-way in-situ solidification mixing equipment structure is 1500mm. Three groups of fixed stirring blades 32 are arranged on the fixed support 22, and six groups are evenly arranged on the first stirring blade 311 and the second stirring blade 312, wherein the transverse plate 332 on the second stirring blade 312 is located on the inner side of the transverse plate 332 of the first stirring blade 311 and the fixed stirring blade 32; two groups of end blades 34 are arranged at the end of the stirring head 3, protruding 5 cm from the surface of the first rotating shell 361; the ridge plate 38 on the cover plate 37 protrudes 5 cm from the surface of the cover plate 37; the angle between the transverse plate 332 of the stirring blade and the tangent direction of the circular rotating shell is 17°; in this embodiment, the interior of a single stirring head 3 is as follows Fig.12 The arrangement shown is provided with a hydraulic motor 39 for providing rotational power. The driving shaft of the hydraulic motor 39 has two driving gears 391, one of which is directly meshed with a driven gear 392 on the second rotating shaft 352, and the other is meshed with a driven gear 392 on the first rotating shaft 351 through a reversing gear 393, so that the two rotating rods rotate in opposite directions; the channel 1 51 in the conveying pipeline system 5 is used for conveying curing agent powder, and nozzles 53 are respectively provided on the inner sides of the fixed stirring blades 32 of the three stirring heads 3, and the structure of the nozzle 53 is the same as that of the embodiment 1.

[0071] The method of use in this embodiment is the same as that in the first embodiment and will not be described in detail here.

[0072] Embodiment 3

[0073] Combine the following Figure 3 , Figure 6 , Fig. 9 , Fig.10 , Figure 12~Figure 17 To further explain the utility model, this embodiment relates to an industrial park parking lot project beside a river. The original site was a fish and crab farm, with a silt layer rich in organic matter on the surface and a soft soil layer with high water content and low bearing capacity underneath. In order to meet the construction challenges, we used dry construction to reduce the moisture content of the soil and increase the bearing capacity of the foundation, and selected PO 42.5 cement as the curing agent, set the incorporation ratio of 150kg / m³, and the reinforcement design depth of 7m, which not only ensured the reinforcement effect but also controlled the cost and improved the economic benefits of the project.

[0074] The structure of the bidirectional in-situ curing and mixing equipment used in this embodiment is similar to that in the first embodiment, except that:

[0075] In the present embodiment, the reinforcement depth reaches 7 meters, so the total length of the extension arm 2 and the mixing head 3 of the mixing equipment used is at least 8 meters, and the construction carrier 7 adopts an excavator of type 300 or above; there are two mixing heads 3 at the bottom of the mixing equipment structure in the present project, and the two mixing heads 3 are symmetrically arranged with an angle of 135°, and the operating projection size of the two-way in-situ solidification mixing equipment structure is 1600mm×850mm; two groups of fixed mixing blades 32 are arranged on the fixed support 22, and the first mixing blade 311 and the second mixing blade 312 are evenly arranged with six groups, and each blade is provided with two layers of parallel horizontal plates 332, and the horizontal plates 332 of the upper and lower adjacent blades are staggered, wherein the outer horizontal plate 332 on the second mixing blade 312 is located at the outermost side of the corresponding horizontal plate 332 of the first mixing blade 311 and the fixed mixing blade 32; two groups of end cutter heads 34 are arranged at the end of the mixing head 3, protruding from the first rotating shell 3 61 surface 3cm; the ridge plate 38 on the cover plate 37 protrudes 3cm from the surface of the cover plate 37; the angle between the horizontal plate 332 of the mixing blade and the tangent direction of the circular rotating shell is 22°; since the mixing equipment structure in the project of this embodiment has a large number of blades and a large operating area, the required mixing energy is relatively high. The interior of a single mixing head 3 is the same as that of the first embodiment, and two high-power hydraulic motors 39 are used to respectively drive the first rotating shaft 351 and the second rotating shaft 352 to rotate. The driving gears 391 on the driving shafts of the two hydraulic motors 39 are respectively meshed with the driven gears 392 on the first rotating shaft 351 and the second rotating shaft 352, so that the two rotate in opposite directions, thereby achieving the purpose of two-way mixing; due to the high cement content, the channel 1 51 and the channel 2 52 in the conveying pipeline system 5 both adopt a cement powder conveying method, and nozzles 53 are respectively provided on the inner sides of the fixed mixing blades 32 of the mixing head 3, and the nozzle 53 structure is as shown in Fig.16 (b) A circular nozzle 56 is provided at the end of the nozzle 531.

[0076] The structure and method of use of the stirring device in this embodiment are the same as those in the first embodiment, and will not be described again here.

[0077] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0078] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0079] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A bidirectional in-situ curing and mixing device, characterized in that: The invention comprises a mounting base plate (1), an extension arm (2), at least two stirring heads (3) and an oil circuit system (4); the upper end of the extension arm (2) is fixedly connected to the mounting base plate (1); a plurality of stirring heads (3) are arranged at intervals along the circumferential direction at the lower end of the extension arm (2); each stirring head (3) comprises a stirring fixed part, a bidirectional rotation drive component, a first stirring rotating part and a second stirring rotating part; the stirring fixed part is arranged at the lower end of the extension arm (2); a plurality of fixed stirring blades (32) are arranged at intervals along the circumferential direction on the outer circumference of the stirring fixed part; the bidirectional rotation drive component is arranged on the stirring fixed part, the bidirectional rotation drive component is respectively connected to the first stirring rotating part and the second stirring rotating part, and the stirring fixed part, the first stirring rotating part and the second stirring rotating part are coaxial. The invention is provided that: the bidirectional rotation drive component is used to drive the first stirring rotating part and the second stirring rotating part to rotate in opposite directions; a plurality of first stirring blades (311) are arranged at intervals along the circumferential direction on the outer circumference of the first stirring rotating part, and a plurality of second stirring blades (312) are arranged at intervals along the circumferential direction on the outer circumference of the second stirring rotating part, and the fixed stirring blades (32), the first stirring blades (311) and the second stirring blades (312) are arranged in a staggered manner to achieve the effect of mutually cutting the soil; a nozzle (53) is arranged on the inner side of at least one of the fixed stirring blades (32) in each of the stirring heads (3); the oil circuit system (4) provides power for the bidirectional rotation drive component to drive the stirring head (3) to perform a rotation stirring action, and at the same time converts the number of rotations according to the amount of flowing oil and records it.

2. The bidirectional in-situ curing and mixing equipment according to claim 1, characterized in that: The stirring fixed part is a fixed support (22), the fixed support (22) is fixedly arranged at the lower end of the extension arm (2), and the fixed stirring blades (32) are arranged on the outer peripheral wall of the fixed support (22) at intervals along the circumferential direction; the first stirring rotating part comprises a first rotating shaft (351) and a first rotating shell (361); the first rotating shaft (351) is transmission-connected to the bidirectional rotating drive assembly through a first transmission part; the first rotating shell (361) is fixedly connected to the first rotating shaft (351); a plurality of the first stirring blades (311) are arranged at intervals along the circumferential direction on the first rotating shell (361) The second stirring rotating part comprises a second rotating shaft (352) and a second rotating shell (362); the second rotating shaft (352) is connected to the bidirectional rotating drive assembly through a second transmission part, the second rotating shell (362) is fixedly connected to the second rotating shaft (352), and a plurality of second stirring blades (312) are arranged on the outer peripheral wall of the second rotating shell (362) at intervals along the circumferential direction; the second rotating shell (362) and the first rotating shell (361) rotate in opposite directions, and the first stirring blade (311) and the second stirring blade (312) achieve a staggered stirring function.

3. The bidirectional in-situ curing and mixing equipment according to claim 2, characterized in that: The second stirring blade (312) is located between the first stirring blade (311) and the fixed stirring blade (32); end blades (34) are arranged at intervals along the circumferential direction at the end of the first rotating shell (361); a cover plate (37) is provided on the bottom surface of the first rotating shell (361); a plurality of ridges (38) are arranged along the diameter of the cover plate (37); and the ridges (38) protrude from the cover plate (37) by 3 to 5 cm.

4. The bidirectional in-situ curing and mixing equipment according to claim 2, characterized in that: The first stirring blade (311), the second stirring blade (312) and the fixed stirring blade (32) all comprise a vertical plate (331) and at least one horizontal plate (332); the horizontal plate (332) is connected to the outer peripheral wall of the rotating shell through the vertical plate (331); the horizontal plates (332) on the first stirring blade (311) and the second stirring blade (312) are at an angle of 15° to 30° with the tangent direction of the rotating shell, the horizontal plate (332) on the fixed stirring blade (32) is arranged horizontally with the tangent direction of the rotating shell, and the horizontal plates (332) on the first stirring blade (311), the second stirring blade (312) and the fixed stirring blade (32) are arranged in staggered layers in a direction perpendicular to the rotating shell.

5. The bidirectional in-situ curing and mixing equipment according to claim 2, characterized in that: The nozzles (53) are arranged on the inner side of the vertical plate (331) that fixes the stirring blades (32); the nozzle head (531) of each nozzle (53) is in the shape of an isosceles trapezoid, and the diameter of the nozzle head (531) gradually decreases from the inside to the outside; the nozzle heads (531) are respectively provided with transverse slit-shaped nozzles (54) and vertical slit-shaped nozzles (55), or a circular nozzle (56) is provided at the end of the nozzle head (531) where it closes.

6. The bidirectional in-situ curing and mixing equipment according to claim 2, characterized in that: The first rotating shaft (351) is an inner rotating rod, the second rotating shaft (352) is an outer rotating rod, the second rotating shaft (352) is a hollow structure, and the second rotating shaft (352) is sleeved on the outer peripheral wall of the first rotating shaft (351); the first rotating shaft (351) and the second rotating shaft (352) are coaxially arranged and can rotate relative to each other; the first rotating shaft (351) is connected to the first rotating shell (361) through the first connecting section (3612), and the second rotating shaft (352) is connected to the second rotating shell (362) through the second connecting section (3622); the bidirectional rotation drive assembly is used to provide rotational power for the first rotating shaft (351) and the second rotating shaft (352).

7. The bidirectional in-situ curing and mixing equipment according to claim 1, characterized in that: The bidirectional rotation drive assembly comprises a single hydraulic motor (39). When the single hydraulic motor (39) is used for driving, two driving gears (391) are arranged on the driving shaft of the hydraulic motor (39), wherein one driving gear (391) is directly meshed with a driven gear (392) connected to one rotating shaft to realize transmission, and the other driving gear (391) is meshed with a driven gear (392) connected to another rotating shaft via a reversing gear (393) to realize transmission, thereby causing the two rotating rods to rotate in opposite directions.

8. The bidirectional in-situ curing and mixing equipment according to claim 1, characterized in that: The bidirectional rotation drive assembly comprises two hydraulic motors (39). When the two hydraulic motors (39) are used for driving, a driving gear (391) is provided on the driving shafts of the two hydraulic motors (39). The two driving gears (391) are respectively meshed with a driven gear (392) connected to the first rotating shaft (351) and a driven gear (392) connected to the second rotating shaft (352) to realize transmission, thereby causing the two rotating shafts to rotate in opposite directions.

9. The bidirectional in-situ curing and mixing equipment according to claim 1, characterized in that: The oil circuit system (4) comprises an oil inlet valve (41), an oil outlet valve (42), a control valve (43) and a hydraulic flow meter (44); the oil inlet valve (41) and the oil outlet valve (42) are respectively arranged on the extension arm (2); the oil inlet valve (41) is connected to the oil inlet portion of the control valve (43) via an oil inlet pipe (451); the hydraulic flow meter (44) is connected to port 1 of the control valve (43) via an oil pipe; the hydraulic flow meter (44) is connected to the bidirectional rotation drive assembly of each stirring head (3) via a first drive oil pipe (461); the bidirectional rotation drive assembly of each stirring head (3) is connected to port 2 of the control valve (43) via an oil pipe via a second drive oil pipe (462); and the oil outlet portion of the control valve (43) is connected to the oil outlet valve (42) via an oil outlet pipe (452).

10. The bidirectional in-situ curing and mixing equipment according to claim 1, characterized in that: It also includes a material supply backstage (6) and a construction carrier (7); the material supply backstage (6) is used for solidification and stirring to provide a solidifying agent and auxiliary high-pressure gas to the nozzle (53); a connecting plate (12) is provided on the installation base plate (1), and a pin hole (13) is provided on the connecting plate (12), and a pin shaft (11) passes through the pin hole (13) to fix the installation base plate (1) and the construction carrier (7) together.

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