Deep soft soil stratum cement mixing pile drill bit assembly

Abstract

The invention provides a deep and thick soft soil stratum cement mixing pile drill bit assembly which comprises an outer pipe and an inner pipe, the outer pipe is rotationally arranged on the surface of the inner pipe in a sleeving mode, a spraying hole is formed in the bottom end of the surface of the inner pipe, and the deep and thick soft soil stratum cement mixing pile drill bit assembly further comprises a soil drilling assembly, a first mixing assembly, a second mixing assembly, a third mixing assembly and two angle adjusting assemblies. According to the angle adjusting assembly disclosed by the invention, synchronous angle adjustment on a plurality of inserted third stirring blades is realized, that is, the inclination angle of the third stirring blades is adjusted according to the soil texture condition so as to adjust the stirring capacity, and after the inserted third stirring blades are limited, the angle of the third stirring blades is adjusted. Synchronous angle adjustment can be performed on a plurality of third stirring blades, so that on one hand, the adjustment difficulty is reduced, and on the other hand, different soil texture conditions can be adapted.

Description

Technical Field

[0001] The invention belongs to the field of mixing pile drill bits, and in particular relates to a cement mixing pile drill bit assembly for thick soft soil layers. Background Art

[0002] Cement mixing piles refer to an effective form of soft foundation treatment. It uses cement as the main agent of curing agent. A mixing pile machine is used to spray cement into the soil and fully mix it, so that a series of physical and chemical reactions occur between the cement and the soil, hardening the soft soil and improving the foundation strength.

[0003] In soft soil, the inclination angle of the stirring blade will affect the stirring capacity. A smaller inclination angle may help reduce stirring resistance and improve stirring efficiency. However, if the inclination angle is too small, it may also cause uneven stirring and affect the quality of the mixing pile.

[0004] The cement mixing pile has a two-way mixing type. The two-way mixing pile includes an inner tube and an outer tube. Both the inner tube and the outer tube are provided with mixing blades. The mixing blades on the inner tube and the inner tube are fixed. Therefore, the mixing blades of the existing cement mixing pile are not convenient for adjusting the angle according to the actual soil conditions, which is not conducive to adapting to different soil conditions. Summary of the invention

[0005] In view of this, the present invention aims to propose a cement mixing pile drill bit assembly for deep soft soil layers to solve the technical problem that the mixing blades of the existing cement mixing piles are not convenient for adjusting the angle according to the actual soil conditions and are not conducive to adapting to different soil conditions.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows: A deep soft soil stratum cement mixing pile drill bit assembly comprises an outer tube and an inner tube, the outer tube is rotatably sleeved on the surface of the inner tube, a spray hole is opened at the bottom end of the inner tube surface, and also comprises a soil drilling assembly, a first stirring assembly, a second stirring assembly, a third stirring assembly and two angle adjustment assemblies, the soil drilling assembly is arranged at the bottom end of the inner tube, the soil drilling assembly is used to drill holes in the soil layer, the first stirring assembly is arranged on the surface of the inner tube, the second stirring assembly is arranged on the surface of the outer tube, the third stirring assembly comprises two stirring frames, the top and bottom ends of the two stirring frames are butt-jointed, the bottom ends of the two stirring frames are rotatably arranged on the surface of the inner tube, the top ends of the two stirring frames are clamped on the surface of the outer tube, a plurality of third stirring blades are arranged on the two stirring frames, the two angle adjustment assemblies are respectively arranged on the two stirring frames, and the two angle adjustment assemblies are respectively used to synchronously adjust the angles of the plurality of third stirring blades on the two stirring frames.

[0007] Furthermore, the soil boring assembly comprises a connecting body and two soil boring teeth, the two soil boring teeth are fixedly connected to the connecting body, and the connecting body is threadedly connected to the bottom end of the inner tube.

[0008] Furthermore, the first stirring assembly includes a plurality of first stirring blades, which are fixedly connected to the surface of the inner tube, and are divided into four pairs. Each pair of the first stirring blades is located at the same length point of the inner tube in the extension direction, and each pair of the first stirring blades is arranged in a circular array on the surface of the inner tube.

[0009] Furthermore, the second stirring assembly includes two second stirring blades, which are fixedly connected to the surface of the outer tube and are distributed in a circular array with the outer tube as a reference.

[0010] Furthermore, the third stirring component includes a plurality of third stirring blades, and the plurality of third stirring blades are all plugged into the stirring frame, and the plurality of third stirring blades on the same stirring frame are linearly arranged.

[0011] Further, the angle adjustment assembly includes an adjustment cavity, a plurality of movable frames, a plurality of sockets, three limit blocks and a threaded adjustment assembly, the adjustment cavity is provided on the surface of the stirring frame, a plurality of linearly arranged sockets are provided on the inner side wall of the adjustment cavity, a plurality of sockets are respectively plugged into a plurality of sockets, a clamping groove is provided on the top of the socket, the clamping groove is located inside the adjustment cavity, an adjustment shaft is rotatably connected to the socket, a first end of the adjustment shaft is fixedly connected to the end of the third stirring blade, a second end of the adjustment shaft is located in the adjustment cavity, and a follower gear is fixedly connected to the second end of the adjustment shaft; The plurality of movable frames are all arranged inside the adjusting chamber, the plurality of movable frames all include a first horizontal plate and two second vertical plates, the two second vertical plates are all slidably arranged inside the adjusting chamber, an adjusting rack is fixedly arranged on the surface of one of the second vertical plates, the plurality of adjusting racks are respectively meshed with a plurality of follower gears, the tops of the plurality of first horizontal plates are all slidably plugged with two support rods, the bottom ends of the two support rods on the same first horizontal plate penetrate the first horizontal plate, the bottom ends of the two support rods on the same first horizontal plate are fixedly connected with two gas springs, the bottom ends of the two gas springs are fixedly connected with card pins, the plurality of card pins are respectively plugged into the card slots on the tops of the plurality of sockets, and the tops of the two support rods on the same first horizontal plate are fixedly connected with a linkage plate; The threaded adjustment assembly is arranged in the adjustment cavity and is used for moving and adjusting the plurality of linkage plates.

[0012] Furthermore, the threaded adjustment assembly includes a threaded rod, which is rotatably connected to the inner wall of the adjustment chamber, and a plurality of threaded sleeves are threadedly connected to the surface of the threaded rod. The plurality of threaded sleeves are respectively fixedly connected to the plurality of linkage plates, and an adjustment button is fixedly connected to the surface of the threaded rod.

[0013] Furthermore, a limit assembly is provided on the plug socket, and the limit assembly includes a plug rail, a limit groove and a mounting groove, the plug rail is fixedly connected to the first surface of the plug socket, the first surface is located inside the adjustment cavity, a limit rack is provided above the plug rail, the limit rack is adapted to the follower gear, the limit groove is provided at the end of the adjustment shaft, the limit pin is adapted to the limit groove, the mounting groove is provided at the bottom end of the first surface, a support spring is fixedly connected inside the mounting groove, the top end of the support spring is fixedly connected to the limit pin, and a connecting plate is fixedly connected between the limit pin and the limit rack; A linkage component is arranged on the side of the limit pin, and the linkage component is used to link the limit pin and the limit rack to move and cancel the limit on the follower gear during the process of the plug-in socket being plugged into the plug interface and meshing with the follower gear and continuing to be plugged and moved.

[0014] Furthermore, the linkage assembly includes a sliding seat, a linkage groove and a baffle, the sliding seat is slidably plugged into the plug-in seat, and the end of the sliding seat is rotatably connected with a linkage pin; The linkage groove is provided on the surface of the limit pin, and an oblique groove is provided on the side wall of the linkage groove, and the oblique groove is slidably connected with the linkage pin; The baffle is fixedly connected to the surface of the clamping pin and contacts the end of the sliding seat.

[0015] Further, the inner tube surface and the outer tube surface are respectively provided with a first annular groove and a second annular groove, the top and bottom ends of the stirring frame are fixedly connected with a first arc frame, the first arc frame is fixedly connected with a second arc frame, both ends of the second arc frame are fixedly connected with a positioning plate between the first arc frame, the second arc frame on the same stirring frame is respectively inserted into the first annular groove and the second annular groove, and the positioning plates located at the same end of the two first stirring frames are fixedly connected by bolts; A clamping block is fixedly connected to the bottom of the second arc-shaped frame located at the top of the stirring frame. Two clamping interfaces are provided on the second annular groove. The clamping blocks on the two stirring frames are respectively inserted into the two clamping interfaces.

[0016] Compared with the prior art, the deep soft soil cement mixing pile drill bit assembly of the present invention has the following advantages: The angle adjustment component described in the present invention realizes the synchronous angle adjustment of multiple plug-in third stirring blades, that is, it realizes the adjustment of the inclination angle of the third stirring blade according to the soil conditions to adjust the stirring capacity, and after the plug-in third stirring blades are limited, the angles of multiple third stirring blades can be adjusted synchronously. On the one hand, it reduces the difficulty of adjustment, and on the other hand, it is conducive to adapting to different soil conditions.

[0017] When the third stirring blade needs to be replaced, the threaded rod can be rotated in the opposite direction, and the threaded sleeve drives the linkage plate to move upward. The linkage plate moves upward through the support rod and the gas spring. The gas spring will first recover to the maximum extension, and then when the linkage plate continues to move upward, the gas spring will pull the coupling pin out of the coupling groove. After the coupling pin falls off the coupling groove, the linkage point of the gas spring and the support rod will be hooked to the bottom of the first horizontal plate, the first horizontal plate will be pulled and driven until the top of the first horizontal plate contacts the limit block, completing the reset, and multiple sockets can be taken out, which is convenient for the replacement and maintenance of the third stirring blade.

[0018] (2) In the process of the plug-in socket being plugged into the plug-in interface described in the present invention, the follower gear will first be plugged into and meshed with the tooth gap of the adjusting rack, and the adjusting rack will limit the state of the follower gear. As the plug-in socket continues to move in the plug-in interface, the linkage assembly will link the limit pin to move downward, and the limit pin will synchronously drive the limit pin to leave the limit groove through the connecting plate, thereby canceling the limit of the follower gear by the limit rack, and synchronously canceling the limit of the limit pin on the adjusting shaft, thereby achieving the goal of maintaining the third stirring blade in a stable state relative to the plug-in socket before the third stirring blade is installed, and canceling the limit of the third stirring blade after the third stirring blade is installed, thereby providing conditions for the relative rotation of the third stirring blade and the plug-in socket, so that the angle adjustment assembly can adjust the angle of the third stirring blade.

[0019] As the socket continues to move in the plug interface, the baffle will limit the sliding seat, and the sliding seat will maintain the linkage pin stationary. As the limit pin continues to move driven by the socket, the linkage pin will act on the inclined groove, causing the limit pin to move downward, and the limit pin drives the limit rack to move downward synchronously, thereby canceling the limit on the follower gear and the adjusting shaft, providing conditions for the relative rotation of the third stirring blade and the socket. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of a cement mixing pile drill bit assembly for deep soft soil layers according to an embodiment of the present invention; Figure 2This is a first structural schematic diagram of an inner tube of a cement mixing pile drill bit assembly for deep soft soil layers according to an embodiment of the present invention; Figure 3 A second structural schematic diagram of an inner tube of a cement mixing pile drill bit assembly for deep soft soil layers according to an embodiment of the present invention; Figure 4 A first structural schematic diagram of an outer tube of a cement mixing pile drill bit assembly for deep soft soil layers according to an embodiment of the present invention; Figure 5 An exploded view of a mixing frame and a sealing plate of a cement mixing pile drill bit assembly for deep soft soil layers according to an embodiment of the present invention; Figure 6 for Figure 5 Enlarged view of part B; Figure 7 for Figure 5 Enlarged view of part A; Figure 8 It is a schematic structural diagram of a limit rack and a limit pin of a cement mixing pile drill bit assembly in a deep soft soil layer according to an embodiment of the present invention; Fig. 9 It is a structural schematic diagram of a movable frame, a plug-in seat and a third stirring blade of a cement mixing pile drill bit assembly for deep soft soil layers according to an embodiment of the present invention; Fig.10 A structural cross-sectional view of a first state of a plug-in socket, a limit rack and a limit pin of a cement mixing pile drill bit assembly for deep soft soil layers according to an embodiment of the present invention; Fig.11 It is a structural cross-sectional view of a second state of a plug-in socket, a limit rack and a limit pin of a cement mixing pile drill bit assembly in a deep soft soil layer according to an embodiment of the present invention; Fig.12 This is a first structural schematic diagram of a movable frame and a coupling pin of a cement mixing pile drill bit assembly for deep soft soil layers according to an embodiment of the present invention.

[0021] Description of reference numerals: 1-outer tube; 2-inner tube; 201-spray hole; 202-bearing 3-connector; 4-drilling tooth; 5-first stirring blade; 6-fourth stirring blade; 7-second stirring blade; 8-third stirring blade; 9-first annular groove; 10-second annular groove; 11-first arc frame; 12-positioning plate; 13-bolt; 14-clamping block; 15-clamping interface; 16-adjusting chamber; 17-movable frame; 1701-first horizontal plate; 1702-second vertical plate; 18-plug-in seat; 19-plug-in interface; 20-plug-in groove; 21-adjusting shaft; 22-following gear; 23-adjusting rack; 24 -support rod; 25-gas spring; 26-clamping pin; 27-linkage plate; 28-threaded rod; 29-threaded sleeve; 30-adjusting button; 31-positioning screw; 32-sealing plate; 33-fastening screw sleeve; 34-plug-in rail; 35-limiting groove; 36-installation groove; 37-first surface; 38-limiting rack; 39-support spring; 40-limiting pin; 41-connecting plate; 42-sliding seat; 43-linkage groove; 44-baffle; 45-linkage pin; 46-bevel groove; 47-limiting block; 48-stirring frame; 49-first arc frame; first rotation direction a; second rotation direction b. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0026] like Figures 1 to 12 As shown, in one embodiment, a cement mixing pile drill bit assembly for deep soft soil layer includes an outer tube 1 and an inner tube 2, wherein the outer tube 1 is rotatably sleeved on the surface of the inner tube 2, and a spray hole 201 is opened at the bottom end of the surface of the inner tube 2, and further includes a soil drilling assembly, a first mixing assembly, a second mixing assembly, a third mixing assembly and two angle adjustment assemblies; It should be understood that the top of the inner tube 2 is fixedly connected to two bearings 202, and the outer rings of the two bearings 202 are fixedly plugged at both ends of the outer tube 1, so that the inner tube 2 is rotatably connected to the outer tube 1, and the top and bottom ends of the outer tube 1 are blocked. During the implementation process, the top of the inner tube 2 and the top of the outer tube 1 are flange-connected to the external rotary drive unit respectively, and the inner tube 2 and the outer tube 1 are driven to rotate in different directions by the external rotary drive assembly to achieve bidirectional stirring; The soil drilling assembly is arranged at the bottom end of the inner tube 2, and is used to drill holes in the soil layer. The soil drilling assembly comprises a connector 3 and two soil drilling teeth 4, and the two soil drilling teeth 4 are fixedly connected to the connector 3, and the connector 3 is threadedly connected to the bottom end of the inner tube 2; It should be understood that during the drilling process, the inner tube 2 drives the connector 3 and the soil drilling teeth 4 to rotate synchronously in the first rotation direction a, and the soil drilling teeth 4 scrape the soil layer to achieve drilling; The first stirring assembly is arranged on the surface of the inner tube 2, and the first stirring assembly includes a plurality of first stirring blades 5, and the plurality of first stirring blades 5 are fixedly connected to the surface of the inner tube 2, and the plurality of first stirring blades 5 are divided into four pairs, and each pair of first stirring blades 5 is located at the same length point position of the inner tube 2 in the extension direction, and each pair of first stirring blades 5 are arranged in an annular array on the surface of the inner tube 2; Specifically, two fourth stirring blades 6 are fixedly connected to the surface of the inner tube 2, the two fourth stirring blades 6 are fixedly connected to the surface of the inner tube 2, the two fourth stirring blades 6 are located below all the third stirring components, and the two fourth stirring blades 6 are located above the nozzle; It should be understood that there is a spacing between different pairs of first stirring blades 5, providing space for the movement of the third stirring blade 8, and the first stirring blade 5 will rotate in the first rotation direction a driven by the inner tube 2; The second stirring assembly is arranged on the surface of the outer tube 1, and the second stirring assembly comprises two second stirring blades 7, the two second stirring blades 7 are fixedly connected to the surface of the outer tube 1, and are distributed in a circular array with the outer tube 1 as a reference; It should be understood that by providing the second stirring blade 7, the soil layer above the first stirring blade 5 is stirred in the second rotation direction b under the drive of the outer tube 1; The third stirring assembly includes two stirring racks 48, the top and bottom ends of the two stirring racks 48 are butt-jointed, the bottom ends of the two stirring racks 48 are rotatably arranged on the surface of the inner tube 2, the top ends of the two stirring racks 48 are clamped on the surface of the outer tube 1, and the two stirring racks 48 are provided with a plurality of third stirring blades 8, the plurality of third stirring blades 8 are plugged into the stirring racks 48, and the plurality of third stirring blades 8 on the same stirring rack 48 are linearly arranged; Specifically, the plurality of third stirring blades 8 are respectively located between different adjacent pairs of first stirring blades 5; It should be understood that the third stirring blade 8 moves in the second rotation direction b under the drive of the outer tube 1, and the third stirring blade 8 stirs the soil between the adjacent first stirring blades 5, that is, the soil at different positions is stirred, and the soil at different positions is stirred in different directions, which is conducive to the full mixing of cement soil; The surface of the inner tube 2 and the surface of the outer tube 1 are respectively provided with a first annular groove 9 and a second annular groove 10. The top and bottom ends of the stirring frame 48 are fixedly connected with a first arc frame 11. The first arc frame 11 is fixedly connected with a second arc frame 49. Both ends of the second arc frame 49 are fixedly connected with the first arc frame 11 with a positioning plate 12. The second arc frame 49 on the same stirring frame 48 is slidably inserted into the first annular groove 9 and the second annular groove 10 respectively. The positioning plates 12 at the same end of the two first stirring frames 48 are fixedly connected by bolts 13. A clamping block 14 is fixedly connected to the bottom of the second arc-shaped frame 49 at the top of the stirring frame 48. Two clamping interfaces 15 are provided on the second annular groove 10. The clamping blocks 14 on the two stirring frames 48 are respectively inserted into the two clamping interfaces 15. It should be understood that in the process of installing the stirring frame 48, the second arc frame 49 on the stirring frame 48 is respectively inserted into the first annular groove 9 and the second annular groove 10, and the second arc frames 49 at the first annular groove 9 and the second annular groove 10 are connected to form a circular frame to achieve the sleeve connection of the first annular groove 9 and the second annular groove 10, and then the bolts 13 are used to fix the docking positioning plates 12 to stabilize the circular frame, thereby achieving the docking of the two stirring frames 48. During the docking of the second arc frame 49, the clamping block 14 at the bottom of the first arc frame 11 at the top of the stirring frame 48 is inserted into the clamping interface 15 to form a limit, so that the top of the stirring frame 48 is clamped with the second annular groove 10 to achieve the synchronous rotation of the stirring frame 48 and the outer tube 1. The first arc frame 11 at the bottom of the stirring frame 48 is slidably set in the first annular groove 9, and the circular frame formed at the bottom of the two stirring frames 48 is rotatably connected with the inner tube 2; Two angle adjustment components are respectively arranged on the two stirring frames 48, and the two angle adjustment components are respectively used to synchronously adjust the angles of the multiple third stirring blades 8 on the two stirring frames 48; the angle adjustment component includes an adjustment chamber 16, multiple moving frames 17, multiple sockets 18, three limit blocks 47 and a threaded adjustment component, the adjustment chamber 16 is opened on the surface of the stirring frame 48, and the inner side wall of the adjustment chamber 16 is provided with multiple linearly arranged plug interfaces 19, and the multiple sockets 18 are respectively plugged into the multiple plug interfaces 19, and the top of the socket 18 is provided with a clamping groove 20, and the clamping groove 20 is located inside the adjustment chamber 16. An adjustment shaft 21 is rotatably connected to the socket 18, and the first end of the adjustment shaft 21 is fixedly connected to the end of the third stirring blade 8, and the second end of the adjustment shaft 21 is located in the adjustment chamber 16, and the second end of the adjustment shaft 21 is fixedly connected to the driven gear 22; A plurality of movable frames 17 are all arranged inside the adjustment chamber 16, and the plurality of movable frames 17 all include a first transverse plate 1701 and two second vertical plates 1702, and the two second vertical plates 1702 are all slidably arranged inside the adjustment chamber 16, and an adjustment rack 23 is fixedly arranged on the surface of one of the second vertical plates 1702, and the plurality of adjustment racks 23 are respectively meshed with the plurality of follower gears 22, and two support rods 24 are slidably plugged into the tops of the plurality of first transverse plates 1701, and the bottom ends of the two support rods 24 on the same first transverse plate 1701 penetrate the first transverse plate 1701, and the bottom ends of the two support rods 24 on the same first transverse plate 1701 are fixedly connected with two gas springs 25, and the bottom ends of the two gas springs 25 are fixedly connected with a snap-in pin 26, and the plurality of snap-in pins 26 are respectively plugged into the snap-in grooves 20 on the tops of the plurality of sockets 18, and the top ends of the two support rods 24 on the same first transverse plate 1701 are fixedly connected with a linkage plate 27; Three limit blocks 47 are fixedly connected to the inner wall of the adjustment chamber 16 and are respectively located above the three moving frames 17, and are used to limit the upward movement distance of the three moving frames 17; The threaded adjustment assembly is arranged in the adjustment chamber 16, and is used to move and adjust the multiple linkage plates 27. The threaded adjustment assembly includes a threaded rod 28, which is rotatably connected to the inner wall of the adjustment chamber 16. A plurality of threaded sleeves 29 are threadedly connected on the surface of the threaded rod 28. The plurality of threaded sleeves 29 are respectively fixedly connected to the plurality of linkage plates 27, and an adjustment button 30 is fixedly connected on the surface of the threaded rod 28.

[0027] It should be understood that the third stirring blade 8 can be detachably connected, and the specific connection method is as follows: First, the socket 18 is plugged into the socket 19, and the follower gear 22 is inserted into the side of the adjustment rack 23 in a stationary state to form a meshing engagement, and then the threaded rod 28 is rotated by the adjustment knob 30, and the threaded rod 28 will synchronously drive the multiple threaded sleeves 29 to move, and the multiple threaded sleeves 29 will synchronously drive the linkage plate 27 to move, and the multiple linkage plates 27 will drive the clamping pins 26 to move and insert into the clamping groove 20 under the support of the support rod 24 and the gas spring 25, so as to position the socket 18 in the adjustment chamber 16, thereby realizing the synchronous positioning and installation of the multiple third stirring blades 8; When the engaging pin 26 is fully engaged in the engaging groove 20, the linkage plate 27 contacts the top of the first horizontal plate 1701. When the angle of the third stirring blade 8 needs to be adjusted, the threaded rod 28 is continuously rotated. The threaded rod 28 drives the threaded sleeve 29 to continue to move downward. The threaded sleeve 29 synchronously drives the multiple linkage plates 27 to continue to move. The multiple linkage plates 27 push the moving frame 17 to move while compressing the gas spring 25. The adjusting rack 23 on the moving frame 17 drives the follower gear 22 in and out, so that the follower gear 22 synchronously drives the adjusting shaft 21 and the third stirring blade 8 to rotate, and the angle of the third stirring blade 8 is adjusted. Fig.10 and Fig.11 The third stirring blade 8 is rotated and adjusted from the first state to the second state to complete the angle adjustment, and the angle adjustment of multiple plugged third stirring blades 8 is realized synchronously, that is, the inclination angle of the third stirring blade 8 is adjusted according to the soil conditions to adjust the stirring capacity, and after the plugged third stirring blade 8 is limited, the angle of multiple third stirring blades 8 can be adjusted synchronously, which reduces the difficulty of adjustment; When the third stirring blade 8 is greatly worn and needs to be replaced, the threaded rod 28 can be rotated in the opposite direction, and the threaded sleeve 29 drives the linkage plate 27 to move upward. The linkage plate 27 moves upward through the support rod 24 and the gas spring 25. The gas spring 25 will first restore to the maximum extension, and then when the linkage plate 27 continues to move upward, the gas spring 25 will pull the locking pin 26 out of the locking groove 20. After the locking pin 26 falls off the locking groove 20, the linkage point between the gas spring 25 and the support rod 24 will be hooked to the bottom of the first horizontal plate 1701, and the first horizontal plate 1701 will be pulled and driven until the top of the first horizontal plate 1701 contacts the limit block 47, completing the reset, and multiple sockets 18 can be taken out, which is convenient for the replacement and maintenance of the third stirring blade 8.

[0028] Specifically, the top and bottom ends of the adjustment chamber 16 are fixedly connected with positioning screws 31, and the opening of the adjustment chamber 16 is covered with a sealing plate 32. The top and bottom ends of the sealing plate 32 are both sleeved on the positioning screws 31, and the ends of the two positioning screws 31 are threadedly connected with fastening screw sleeves 33, which limit the sealing cover.

[0029] like Figures 5 to 12 As shown, in one embodiment, a limit assembly is provided on the plug socket 18, and the limit assembly includes a plug rail 34, a limit groove 35 and a mounting groove 36. The plug rail 34 is fixedly connected to the first surface 37 of the plug socket 18, and the first surface 37 is located inside the adjustment cavity 16. A limit rack 38 is provided above the plug rail 34, and the limit rack 38 is adapted to the follower gear 22. The limit groove 35 is provided at the end of the adjustment shaft 21, and the limit pin 40 is adapted to the limit groove 35. The mounting groove 36 is provided at the bottom end of the first surface 37. A support spring 39 is fixedly connected inside the mounting groove 36, and the top end of the support spring 39 is fixedly connected to the limit pin 40, and a connecting plate 41 is fixedly connected between the limit pin 40 and the limit rack 38; A linkage assembly is provided on the side of the limit pin 40, and the linkage assembly is used to link the limit pin 40 and the limit rack 38 to move and cancel the limit on the follower gear 22 during the process of the plug-in socket 18 being plugged into the plug interface 19 and meshing with the follower gear 22 and continuing to be plugged and moved.

[0030] It should be understood that before the third stirring blade 8 is installed on the stirring frame 48, the limiting rack 38 on the socket 18 will mesh with the follower gear 22 to limit the state of the third stirring blade 8 relative to the socket 18 and maintain the initial state; When the connector 18 is plugged into the plug interface 19, the driven gear 22 will first be plugged into the tooth gap of the adjusting rack 23, and the adjusting rack 23 will limit the state of the driven gear 22. When the connector 18 continues to move in the plug interface 19, the linkage assembly will link the limit pin 40 to move downward, and the limit pin 40 will synchronously drive the limit pin 40 to leave the limit groove 35 through the connecting plate 41, cancel the limit of the limit rack 38 on the driven gear 22, and synchronously cancel the limit of the limit pin 40 on the adjusting shaft 21, so as to achieve the third stirring blade 8 being kept in a stable state relative to the connector 18 before the third stirring blade 8 is installed. After the third stirring blade 8 is installed, the limit of the third stirring blade 8 is canceled, so as to provide conditions for the relative rotation of the third stirring blade 8 and the connector 18, so that the angle adjustment assembly can adjust the angle of the third stirring blade 8.

[0031] Specifically, the linkage assembly includes a sliding seat 42, a linkage slot 43 and a baffle 44. The sliding seat 42 is slidably plugged into the plug seat 18, and the end of the sliding seat 42 is rotatably connected with a linkage pin 45; The linkage groove 43 is formed on the surface of the limit pin 40, and an oblique groove 46 is formed on the side wall of the linkage groove 43, and the oblique groove 46 is slidably connected with the linkage pin 45; The baffle plate 44 is fixedly connected to the surface of the latch pin 26 and contacts the end of the sliding seat 42 .

[0032] It should be understood that the specific method of canceling the limiting function of the limiting component on the third stirring blade 8 relative to the socket 18 is as follows: First, the socket 18 is inserted into the plug port 19, and the follower gear 22 is first inserted into the tooth gap of the adjustment rack 23, and the adjustment rack 23 limits the state of the follower gear 22; Secondly, as the connector 18 continues to move in the plug interface 19, the baffle 44 will limit the sliding seat 42, and the sliding seat 42 will maintain the linkage pin 45 stationary. As the limit pin 40 continues to move driven by the connector 18, the linkage pin 45 will act on the inclined groove 46, causing the limit pin 40 to move downward, and the limit pin 40 drives the limit rack 38 to move downward synchronously, thereby canceling the limit on the follower gear 22 and the adjustment shaft 21, providing conditions for the relative rotation of the third stirring blade 8 and the connector 18.

[0033] 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, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A deep soft soil cement mixing pile drill bit assembly, comprising an outer tube (1) and an inner tube (2), wherein the outer tube (1) is rotatably sleeved on the surface of the inner tube (2), and a spray hole (201) is provided at the bottom end of the surface of the inner tube (2), characterized in that: The invention also comprises a soil drilling component, a first stirring component, a second stirring component, a third stirring component and two angle adjustment components, wherein the soil drilling component is arranged at the bottom end of the inner tube (2) and is used to drill holes in the soil layer, the first stirring component is arranged on the surface of the inner tube (2), the second stirring component is arranged on the surface of the outer tube (1), the third stirring component comprises two stirring racks (48), the top ends and bottom ends of the two stirring racks (48) are butt-jointed, the bottom ends of the two stirring racks (48) are rotatably arranged on the surface of the inner tube (2), the top ends of the two stirring racks (48) are clamped on the surface of the outer tube (1), the two stirring racks (48) are provided with a plurality of third stirring blades (8), and the two angle adjustment components are respectively arranged on the two stirring racks (48), and the two angle adjustment components are respectively used to synchronously adjust the angles of the plurality of third stirring blades (8) on the two stirring racks (48).

2. A deep soft soil cement mixing pile drill bit assembly according to claim 1, characterized in that: The soil drilling assembly comprises a connecting body (3) and two soil drilling teeth (4), wherein the two soil drilling teeth (4) are fixedly connected to the connecting body (3), and the connecting body (3) is threadedly connected to the bottom end of the inner tube (2).

3. The deep soft soil cement mixing pile drill bit assembly according to claim 1, characterized in that: The first stirring component comprises a plurality of first stirring blades (5), the plurality of first stirring blades (5) being fixedly connected to the surface of the inner tube (2), the plurality of first stirring blades (5) being divided into four pairs, each pair of the first stirring blades (5) being located at the same length point position of the inner tube (2) in the extension direction, and each pair of the first stirring blades (5) being arranged in a circular array on the surface of the inner tube (2).

4. The deep soft soil cement mixing pile drill bit assembly according to claim 2, characterized in that: The second stirring assembly comprises two second stirring blades (7), the two second stirring blades (7) being fixedly connected to the surface of the outer tube (1) and distributed in a circular array with the outer tube (1) as a reference.

5. The deep soft soil cement mixing pile drill bit assembly according to claim 3, characterized in that: The third stirring component comprises a plurality of third stirring blades (8), the plurality of third stirring blades (8) are all plugged into the stirring frame (48), and the plurality of third stirring blades (8) on the same stirring frame (48) are linearly arranged.

6. The deep soft soil cement mixing pile drill bit assembly according to claim 4, characterized in that: The angle adjustment assembly comprises an adjustment chamber (16), a plurality of movable frames (17), a plurality of sockets (18), three limit blocks (47) and a threaded adjustment assembly, wherein the adjustment chamber (16) is provided on the surface of the stirring frame (48), a plurality of linearly arranged sockets (19) are provided on the inner side wall of the adjustment chamber (16), a plurality of sockets (18) are respectively plugged into the plurality of sockets (19), a clamping groove (20) is provided on the top of the socket (18), the clamping groove (20) is located inside the adjustment chamber (16), an adjustment shaft (21) is rotatably connected to the socket (18), a first end of the adjustment shaft (21) is fixedly connected to an end of the third stirring blade (8), a second end of the adjustment shaft (21) is located in the adjustment chamber (16), and a follower gear (22) is fixedly connected to the second end of the adjustment shaft (21); The plurality of movable racks (17) are all arranged inside the adjustment chamber (16), and the plurality of movable racks (17) all comprise a first horizontal plate (1701) and two second vertical plates (1702), and the two second vertical plates (1702) are all slidably arranged inside the adjustment chamber (16), and an adjustment rack (23) is fixedly arranged on the surface of one of the second vertical plates (1702), and the plurality of adjustment racks (23) are respectively meshed with a plurality of follower gears (22), and the tops of the plurality of first horizontal plates (1701) are all slidably plugged with two support rods (24). , the bottom ends of the two support rods (24) on the same first horizontal plate (1701) penetrate the first horizontal plate (1701), the bottom ends of the two support rods (24) on the same first horizontal plate (1701) are fixedly connected to two gas springs (25), the bottom ends of the two gas springs (25) are fixedly connected to a snap-in pin (26), the multiple snap-in pins (26) are respectively plugged into the snap-in grooves (20) at the tops of the multiple plug-in seats (18), and the top ends of the two support rods (24) on the same first horizontal plate (1701) are fixedly connected to a linkage plate (27); The threaded adjustment assembly is arranged in the adjustment cavity (16) and is used to perform movement adjustment on the plurality of linkage plates (27).

7. A deep soft soil cement mixing pile drill bit assembly according to claim 6, characterized in that: The threaded adjustment assembly comprises a threaded rod (28), the threaded rod (28) being rotatably connected to the inner wall of the adjustment chamber (16), a plurality of threaded sleeves (29) being threadedly connected to the surface of the threaded rod (28), the plurality of threaded sleeves (29) being respectively fixedly connected to the plurality of linkage plates (27), and an adjustment button (30) being fixedly connected to the surface of the threaded rod (28).

8. The deep soft soil cement mixing pile drill bit assembly according to claim 7, characterized in that: A limit assembly is provided on the plug-in seat (18), and the limit assembly comprises a plug-in rail (34), a limit groove (35) and a mounting groove (36). The plug-in rail (34) is fixedly connected to a first surface (37) of the plug-in seat (18), and the first surface (37) is located inside the adjustment cavity (16). A limit rack (38) is provided above the plug-in rail (34), and the limit rack (38) is adapted to the follower gear (22). The limit groove (35) is provided at the end of the adjustment shaft (21), and the limit pin (40) is adapted to the limit groove (35). The mounting groove (36) is provided at the bottom end of the first surface (37). A support spring (39) is fixedly connected inside the mounting groove (36), and the top end of the support spring (39) is fixedly connected to the limit pin (40). A connecting plate (41) is fixedly connected between the limit pin (40) and the limit rack (38); A linkage component is provided on the side of the limit pin (40), and the linkage component is used to link the limit pin (40) and the limit rack (38) to move during the process of the plug-in socket (18) being plugged into the plug interface (19) and meshing with the follower gear (22) to cancel the limit on the follower gear (22).

9. The deep soft soil cement mixing pile drill bit assembly according to claim 8, characterized in that: The linkage assembly comprises a sliding seat (42), a linkage groove (43) and a baffle (44); the sliding seat (42) is slidably plugged into the plug seat (18), and the end of the sliding seat (42) is rotatably connected to a linkage pin (45); The linkage groove (43) is formed on the surface of the limit pin (40), and an inclined groove (46) is formed on the side wall of the linkage groove (43), and the inclined groove (46) is slidably connected to the linkage pin (45); The baffle (44) is fixedly connected to the surface of the latching pin (26) and is in contact with the end of the sliding seat (42).

10. A deep soft soil cement mixing pile drill bit assembly according to any one of claims 1 to 9, characterized in that: The surface of the inner tube (2) and the surface of the outer tube (1) are respectively provided with a first annular groove (9) and a second annular groove (10); the top and bottom ends of the stirring frame (48) are both fixedly connected to a first arc frame (11); the first arc frame (11) is fixedly connected to a second arc frame (49); both ends of the second arc frame (49) are fixedly connected to the first arc frame (11); positioning plates (12) are respectively connected to the first arc frame (11); the second arc frames (49) on the same stirring frame (48) are respectively inserted into the first annular groove (9) and the second annular groove (10); the positioning plates (12) located at the same end of the two first stirring frames (48) are fixedly connected by bolts (13); A second arc-shaped frame (49) located at the top of the stirring frame (48) is fixedly connected to a clamping block (14) at its bottom, and two clamping interfaces (15) are provided on the second annular groove (10), and the clamping blocks (14) on the two stirring frames (48) are respectively inserted into the two clamping interfaces (15).

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