A cement mixing pile drill bit assembly for deep soft soil strata

Abstract

The present invention provides a cement mixing pile drill bit assembly for deep soft soil strata, which includes an outer pipe and an inner pipe. The outer pipe is rotatably sleeved on the surface of the inner pipe. Spray holes are formed at the bottom end of the surface of the inner pipe. The assembly further includes a soil drilling assembly, a first stirring assembly, a second stirring assembly, a third stirring assembly and two angle adjusting assemblies. The angle adjusting assembly of the present invention realizes synchronous angle adjustment of multiple third stirring blades after insertion, that is, it realizes adjusting the inclination angle of the third stirring blades according to the soil conditions to adjust the stirring ability, and also realizes that after limiting the inserted and installed third stirring blades, synchronous angle adjustment of multiple third stirring blades can be carried out. On the one hand, the adjustment difficulty is reduced, and on the other hand, it is beneficial to adapt to different soil conditions.

Description

Technical Field

[0001] The present invention belongs to the field of mixing pile drill bits, and particularly relates to a cement mixing pile drill bit assembly for deep soft soil strata. Background Art

[0002] A cement mixing pile refers to an effective form of soft foundation treatment. Cement is used as the main curing agent, and a mixing pile machine is used to spray cement into the soil and fully mix it, causing a series of physical and chemical reactions between the cement and the soil, thereby hardening the soft soil and increasing the foundation strength.

[0003] In soft soil, the inclination angle of the mixing blades will affect the mixing ability. A smaller inclination angle may help reduce the mixing resistance and improve the mixing efficiency. However, if the inclination angle is too small, it may also lead to uneven mixing and affect the quality of the formed mixing pile.

[0004] There is a type of cement mixing pile with two-way mixing. The two-way mixing pile includes an inner pipe and an outer pipe. Mixing blades are provided on both the inner pipe and the outer pipe, and the mixing blades on the inner pipe and the inner pipe are fixedly arranged. Therefore, the mixing blades of the existing cement mixing piles are not convenient for angle adjustment 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 provide a cement mixing pile drill bit assembly for deep soft soil strata to solve the technical problem that the mixing blades of the existing cement mixing piles are not convenient for angle adjustment 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 realized as follows:

[0007] A cement mixing pile drill bit assembly for deep soft soil strata includes an outer pipe and an inner pipe. The outer pipe is rotatably sleeved on the surface of the inner pipe. A spray hole is provided at the bottom end of the surface of the inner pipe. The assembly further includes a soil drilling component, a first mixing component, a second mixing component, a third mixing component, and two angle adjustment components. The soil drilling component is arranged at the bottom end of the inner pipe and is used for drilling the soil layer. The first mixing component is arranged on the surface of the inner pipe. The second mixing component is arranged on the surface of the outer pipe. The third mixing component includes two mixing frames. The top and bottom ends of the two mixing frames are docked. The bottom ends of the two mixing frames are rotatably arranged on the surface of the inner pipe, and the top ends of the two mixing frames are clamped on the surface of the outer pipe. A plurality of third mixing blades are provided on each of the two mixing frames. The two angle adjustment components are respectively arranged on the two mixing frames and are respectively used for synchronously adjusting the angles of the plurality of third mixing blades on the two mixing frames.

[0008] Further, the soil drilling assembly includes a connecting body and two soil drilling teeth. The two soil drilling teeth are fixedly connected to the connecting body, and the connecting body is threadedly connected to the bottom end of the inner pipe.

[0009] Further, the first stirring assembly includes a plurality of first stirring blades. The plurality of first stirring blades are fixedly connected to the surface of the inner pipe. The plurality of first stirring blades are divided into four pairs. Each pair of first stirring blades is located at the same length point of the inner pipe in the extending direction, and each pair of first stirring blades is arranged in a circular array on the surface of the inner pipe.

[0010] Further, the second stirring assembly includes two second stirring blades. The two second stirring blades are fixedly connected to the surface of the outer pipe and are distributed in a circular array with the outer pipe as a reference.

[0011] Further, the third stirring assembly includes a plurality of third stirring blades. The plurality of third stirring blades are all inserted into the stirring frame, and the plurality of third stirring blades on the same stirring frame are linearly arranged.

[0012] Further, the angle adjustment assembly includes an adjustment cavity, a plurality of moving frames, a plurality of socket seats, three limit blocks, and a threaded adjustment assembly. The adjustment cavity is opened on the surface of the stirring frame. A plurality of linearly arranged insertion openings are opened on the inner side wall of the adjustment cavity. The plurality of socket seats are respectively inserted into the plurality of insertion openings. A clamping groove is opened at the top of the socket seat, and the clamping groove is located inside the adjustment cavity. An adjustment shaft is rotatably connected to the socket seat. The first end of the adjustment shaft is fixedly connected to the end of the third stirring blade. The second end of the adjustment shaft is located inside the adjustment cavity, and a follower gear is fixedly connected to the second end of the adjustment shaft;

[0013] The plurality of moving frames are all arranged inside the adjustment cavity. The plurality of moving frames all include a first horizontal plate and two second vertical plates. The two second vertical plates are both slidably arranged inside the adjustment cavity. An adjustment rack is fixedly arranged on the surface of one of the second vertical plates. The plurality of adjustment racks are respectively meshed with the plurality of follower gears. Two support rods are slidably inserted into the top of each of the plurality of first horizontal plates. The bottom ends of the two support rods on the same first horizontal plate penetrate through the first horizontal plate. The bottom ends of the two support rods on the same first horizontal plate are fixedly connected to two gas springs. The bottom ends of the two gas springs are fixedly connected to clamping pins. The plurality of clamping pins are respectively inserted into the clamping grooves at the tops of the plurality of socket seats. The top ends of the two support rods on the same first horizontal plate are fixedly connected to a linkage plate;

[0014] The threaded adjustment assembly is arranged inside the adjustment cavity and is used for moving and adjusting the plurality of linkage plates.

[0015] Further, the thread adjustment assembly includes a threaded rod rotatably connected to the inner wall of the adjustment cavity. A plurality of threaded sleeves are threadedly connected to the surface of the threaded rod, and the plurality of threaded sleeves are respectively fixedly connected to the plurality of linkage plates. An adjustment knob is fixedly connected to the surface of the threaded rod.

[0016] Further, a limit assembly is provided on the socket. The limit assembly includes a plug-in rail, a limit groove, and a mounting groove. The plug-in rail is fixedly connected to the first surface of the socket, and the first surface is located inside the adjustment cavity. A limit rack is provided above the plug-in rail, and the limit rack is adapted to the follower gear. The limit groove is opened at the end of the adjustment shaft, and the limit pin is adapted to the limit groove. The mounting groove is opened at the bottom end of the first surface, and a support spring is fixedly connected inside the mounting groove. The top end of the support spring is fixedly connected to a limit pin, and a connecting plate is fixedly connected between the limit pin and the limit rack;

[0017] A linkage assembly is provided on the side surface of the limit pin. The linkage assembly is used to link the movement of the limit pin and the limit rack during the process of the socket being inserted into the insertion port and meshing with the follower gear and continuing to be inserted and moved, so as to cancel the limit on the follower gear.

[0018] Further, the linkage assembly includes a sliding seat, a linkage groove, and a baffle. The sliding seat is slidably inserted on the socket, and a linkage pin is rotatably connected to the end of the sliding seat;

[0019] The linkage groove is opened on the surface of the limit pin, and an inclined groove is opened on the side wall of the linkage groove, and the inclined groove is slidably connected to the linkage pin;

[0020] The baffle is fixedly connected to the surface of the clamping pin and contacts the end of the sliding seat.

[0021] Further, a first annular groove and a second annular groove are respectively opened on the surfaces of the inner tube and the outer tube. First arc-shaped frames are fixedly connected to the top and bottom ends of the stirring frame. A second arc-shaped frame is fixedly connected to the first arc-shaped frame. Positioning plates are fixedly connected between the two ends of the second arc-shaped frame and the first arc-shaped frame. The second arc-shaped frames on the same stirring frame are respectively inserted into the first annular groove and the second annular groove, and the positioning plates at the same end of the two first stirring frames are fixedly connected by bolts;

[0022] A clamping block is fixedly connected to the bottom of the second arc-shaped frame at the top of the stirring frame. Two clamping interfaces are opened on the second annular groove, and the clamping blocks on the two stirring frames are respectively inserted into the two clamping interfaces.

[0023] Compared with the prior art, the cement mixing pile drill bit assembly for deep soft soil stratum of the present invention has the following advantages:

[0024] The angle adjustment component described in the present invention realizes synchronous angle adjustment of multiple third stirring blades that have been inserted, that is, it realizes adjusting the inclination angle of the third stirring blades according to the soil conditions to adjust the stirring ability, and also realizes that after limiting the inserted and installed third stirring blades, synchronous angle adjustment of multiple third stirring blades can be performed. On the one hand, it reduces the adjustment difficulty, and on the other hand, it is beneficial to adapt to different soil conditions.

[0025] When the third stirring blade needs to be replaced, the threaded rod can be rotated in the reverse direction. The threaded sleeve drives the linkage plate to move upward. The linkage plate moves upward through the support rod and the air spring. The air spring will first return to the maximum elongation amount. Then, when the linkage plate continues to move upward, it will pull the clamping pin out of the clamping groove through the air spring. After the clamping pin falls out of the clamping groove, the linkage point of the air spring and the support rod will be hooked to the bottom of the first cross plate. The first cross plate will be driven until the top of the first cross plate contacts the limiting block to complete the reset. Multiple socket joints can be taken out, which is convenient for the replacement and maintenance of the third stirring blade.

[0026] (2)During the process of the socket joint being inserted into the insertion port, the follower gear will first be inserted and engaged into the tooth gap of the adjusting rack. The adjusting rack will limit the state of the follower gear. During the process of the socket joint continuing to move in the insertion port, the linkage component will drive the limit pin to move downward. The limit pin will synchronously drive the limit pin to leave the limit groove through the connecting plate, canceling the limit of the limit rack on the follower gear and synchronously canceling the limit of the limit pin on the adjusting shaft. It realizes maintaining the stable state of the third stirring blade relative to the socket joint before installing the third stirring blade, and canceling the limit on the third stirring blade after installing the third stirring blade, providing conditions for the relative rotation of the third stirring blade and the socket joint, so that the angle adjustment component can adjust the angle of the third stirring blade.

[0027] During the process of the socket joint continuing to move in the insertion port, the baffle will limit the sliding seat. The sliding seat keeps the linkage pin stationary. During the process of the limit pin continuing to move driven by the socket joint, the linkage pin will act on the inclined groove, causing the limit pin to move downward. The limit pin drives the limit rack to move downward synchronously, thereby canceling the limit on the follower gear and the adjusting shaft, and providing conditions for the relative rotation of the third stirring blade and the socket joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic 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 drawings:

[0029] Figure 1 is the overall structural schematic diagram of a cement mixing pile drill bit assembly for a deep soft soil layer according to an embodiment of the present invention;

[0030] Figure 2 The first structural schematic diagram of the inner pipe of a cement mixing pile drill bit assembly for a deep soft soil stratum according to an embodiment of the present invention;

[0031] Figure 3 The second structural schematic diagram of the inner pipe of a cement mixing pile drill bit assembly for a deep soft soil stratum according to an embodiment of the present invention;

[0032] Figure 4 The first structural schematic diagram of the outer pipe of a cement mixing pile drill bit assembly for a deep soft soil stratum according to an embodiment of the present invention;

[0033] Figure 5 The exploded view of the mixing frame and the sealing plate of a cement mixing pile drill bit assembly for a deep soft soil stratum according to an embodiment of the present invention;

[0034] Figure 6 It is Figure 5 The enlarged view of part B in

[0035] Figure 7 It is Figure 5 The enlarged view of part A in

[0036] Figure 8 The structural schematic diagram of the limit rack and the limit pin of a cement mixing pile drill bit assembly for a deep soft soil stratum according to an embodiment of the present invention;

[0037] Figure 9 The structural schematic diagram of the moving frame, the insertion socket and the third mixing blade of a cement mixing pile drill bit assembly for a deep soft soil stratum according to an embodiment of the present invention;

[0038] Figure 10 The structural sectional view of the first state of the insertion socket, the limit rack and the limit pin of a cement mixing pile drill bit assembly for a deep soft soil stratum according to an embodiment of the present invention;

[0039] Figure 11 The structural sectional view of the second state of the insertion socket, the limit rack and the limit pin of a cement mixing pile drill bit assembly for a deep soft soil stratum according to an embodiment of the present invention;

[0040] Figure 12 The first structural schematic diagram of the moving frame and the clamping pin of a cement mixing pile drill bit assembly for a deep soft soil stratum according to an embodiment of the present invention.

[0041] Explanation of reference numerals:

[0042] 1 - Outer tube; 2 - Inner tube; 201 - Spray hole; 202 - Bearing; 3 - Connecting body; 4 - Soil 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-shaped frame; 12 - Positioning plate; 13 - Bolt; 14 - Clamping block; 15 - Clamping interface; 16 - Adjustment cavity; 17 - Moving frame; 1701 - First horizontal plate; 1702 - Second vertical plate; 18 - Plug-in socket; 19 - Plug-in interface; 20 - Clamping groove; 21 - Adjustment shaft; 22 - Follow-up gear; 23 - Adjustment rack; 24 - Support rod; 25 - Gas spring; 26 - Clamping pin; 27 - Linkage plate; 28 - Threaded rod; 29 - Threaded sleeve; 30 - Adjustment knob; 31 - Positioning screw; 32 - Sealing plate; 33 - Tightening sleeve; 34 - Plug-in rail; 35 - Limit groove; 36 - Installation groove; 37 - First surface; 38 - Limit rack; 39 - Support spring; 40 - Limit pin; 41 - Connecting plate; 42 - Sliding seat; 43 - Linkage groove; 44 - Baffle; 45 - Linkage pin; 46 - Inclined groove; 47 - Limit block; 48 - Stirring frame; 49 - First arc-shaped frame; First rotation direction a; Second rotation direction b. Detailed implementation mode

[0043] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0044] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0045] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0046] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0047] As Figures 1 to 12 shown, in one embodiment, a cement mixing pile drill bit assembly for deep soft soil strata includes an outer pipe 1 and an inner pipe 2. The outer pipe 1 is rotatably sleeved on the surface of the inner pipe 2. A spray hole 201 is opened at the bottom end of the surface of the inner pipe 2. The assembly further includes a soil drilling assembly, a first stirring assembly, a second stirring assembly, a third stirring assembly, and two angle adjusting assemblies;

[0048] It should be understood that two bearings 202 are fixedly connected to the top end of the inner pipe 2. The outer rings of the two bearings 202 are fixedly inserted at both ends of the outer pipe 1 to rotatably connect the inner pipe 2 and the outer pipe 1, and seal the top and bottom ends of the outer pipe 1. During implementation, the top end of the inner pipe 2 and the top end of the outer pipe 1 are respectively flange-connected to an externally provided rotary drive unit, and the inner pipe 2 and the outer pipe 1 are respectively driven by the externally provided rotary drive assembly to rotate in different directions to achieve two-way stirring;

[0049] The soil drilling assembly is arranged at the bottom end of the inner pipe 2. The soil drilling assembly is used for drilling the soil layer. The soil drilling assembly includes a connecting body 3 and two soil drilling teeth 4. 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 pipe 2;

[0050] It should be understood that during the drilling process, the inner pipe 2 drives the connecting body 3 and the soil drilling teeth 4 to rotate synchronously in the first rotation direction a, and the soil drilling teeth 4 will scrape the soil layer to achieve drilling;

[0051] The first stirring assembly is arranged on the surface of the inner pipe 2. The first stirring assembly includes a plurality of first stirring blades 5. The plurality of first stirring blades 5 are fixedly connected to the surface of the inner pipe 2. The plurality of first stirring blades 5 are divided into four pairs. Each pair of first stirring blades 5 is located at the same length point of the inner pipe 2 in the extension direction, and each pair of first stirring blades 5 is annularly arranged on the surface of the inner pipe 2;

[0052] Specifically, two fourth stirring blades 6 are also fixedly connected to the surface of the inner pipe 2. The two fourth stirring blades 6 are fixedly connected to the surface of the inner pipe 2. The two fourth stirring blades 6 are located below all the third stirring assemblies and above the spray port;

[0053] It should be understood that there is a spacing between different pairs of the first stirring blades 5 to provide space for the movement of the third stirring blades 8, and the first stirring blades 5 will rotate in the first rotation direction a driven by the inner tube 2;

[0054] The second stirring assembly is arranged on the surface of the outer tube 1. The second stirring assembly includes 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 circumferential array with the outer tube 1 as the reference;

[0055] It should be understood that by arranging the second stirring blades 7, the function of stirring the soil above the first stirring blades 5 in the second rotation direction b driven by the outer tube 1 is achieved;

[0056] The third stirring assembly includes two stirring frames 48. The top and bottom ends of the two stirring frames 48 are docked. The bottom ends of the two stirring frames 48 are rotatably arranged on the surface of the inner tube 2, the top ends of the two stirring frames 48 are clamped on the surface of the outer tube 1, and a plurality of third stirring blades 8 are arranged on the two stirring frames 48. The plurality of third stirring blades 8 are inserted into the stirring frames 48, and the plurality of third stirring blades 8 on the same stirring frame 48 are linearly arranged;

[0057] Specifically, the plurality of third stirring blades 8 are respectively located between different adjacent pairs of the first stirring blades 5;

[0058] It should be understood that the third stirring blades 8 will move in the second rotation direction b driven by the outer tube 1. The third stirring blades 8 stir the soil between different adjacent pairs of the first stirring blades 5, that is, the soil at different positions is stirred, and the directions of the soil stirred at different positions are different, which is beneficial to the full mixing of the cement soil;

[0059] The first annular groove 9 and the second annular groove 10 are respectively formed on the surface of the inner tube 2 and the surface of the outer tube 1. The top and bottom ends of the stirring frame 48 are fixedly connected with the first arc-shaped frames 11. The second arc-shaped frame 49 is fixedly connected to the first arc-shaped frame 11. The two ends of the second arc-shaped frame 49 are fixedly connected with the positioning plates 12 between the first arc-shaped frames 11. The second arc-shaped frames 49 on the same stirring frame 48 are respectively slidably inserted into the first annular groove 9 and the second annular groove 10, and the positioning plates 12 at the same end of the two first stirring frames 48 are fixedly connected by bolts 13;

[0060] The bottom of the second arc-shaped frame 49 located at the top of the stirring frame 48 is fixedly connected with a clamping block 14. Two clamping openings 15 are formed on the second annular groove 10, and the clamping blocks 14 on the two stirring frames 48 are respectively inserted into the two clamping openings 15;

[0061] It should be understood that during the installation of the stirring frame 48, the second arc-shaped frames 49 on the stirring frame 48 are respectively inserted into the first annular groove 9 and the second annular groove 10. The second arc-shaped frames 49 at the positions of the first annular groove 9 and the second annular groove 10 are all butted to form a circular frame, realizing the socket connection of the first annular groove 9 and the second annular groove 10. Then, the positioning plates 12 in butt joint are bolt-fixed through the bolts 13 to stabilize the circular frame, thereby realizing the butt joint of the two stirring frames 48. During the butt joint of the second arc-shaped frames 49, the clamping blocks 14 at the bottom of the first arc-shaped frame 11 at the top of the stirring frame 48 are inserted into the clamping interfaces 15 to form a limit, so that the top of the stirring frame 48 is clamped with the second annular groove 10, realizing the synchronous rotation of the stirring frame 48 and the outer pipe 1. The first arc-shaped frame 11 at the bottom end of the stirring frame 48 is slidably arranged in the first annular groove 9, and the circular frame formed by the bottom ends of the two stirring frames 48 is rotatably connected with the inner pipe 2;

[0062] Two angle adjustment components are respectively arranged on the two stirring frames 48, and the two angle adjustment components are respectively used for synchronously adjusting the angles of the multiple third stirring blades 8 on the two stirring frames 48; The angle adjustment component includes an adjustment cavity 16, multiple moving frames 17, multiple socket connectors 18, three limit blocks 47 and a threaded adjustment component. The adjustment cavity 16 is opened on the surface of the stirring frame 48, and a plurality of linearly arranged socket interfaces 19 are opened on the inner side wall of the adjustment cavity 16. The multiple socket connectors 18 are respectively inserted into the multiple socket interfaces 19. A clamping groove 20 is opened at the top of the socket connector 18, and the clamping groove 20 is located inside the adjustment cavity 16. An adjustment shaft 21 is rotatably connected to the socket connector 18. 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 inside the adjustment cavity 16. A follower gear 22 is fixedly connected to the second end of the adjustment shaft 21;

[0063] The multiple moving frames 17 are all arranged inside the adjustment cavity 16. The multiple moving frames 17 all include a first horizontal plate 1701 and two second vertical plates 1702. The two second vertical plates 1702 are both slidably arranged inside the adjustment cavity 16. An adjustment rack 23 is fixedly arranged on the surface of one of the second vertical plates 1702. The multiple adjustment racks 23 are respectively meshed with the multiple follower gears 22. Two support rods 24 are slidably inserted into the top of each of the multiple first horizontal plates 1701. The bottom ends of the two support rods 24 on the same first horizontal plate 1701 penetrate through the first horizontal plate 1701. The bottom ends of the two support rods 24 on the same first horizontal plate 1701 are fixedly connected with two gas springs 25. The bottom ends of the two gas springs 25 are fixedly connected with clamping pins 26. The multiple clamping pins 26 are respectively inserted into the clamping grooves 20 at the top of the multiple socket connectors 18. The top ends of the two support rods 24 on the same first horizontal plate 1701 are fixedly connected with a linkage plate 27;

[0064] Three limit blocks 47 are fixedly connected to the inner wall of the adjustment cavity 16 and are respectively located above the three moving frames 17 for limiting the upward movement distance of the three moving frames 17;

[0065] The threaded adjustment assembly is arranged in the adjustment cavity 16 for moving and adjusting a plurality of linkage plates 27. The threaded adjustment assembly includes a threaded rod 28 which is rotatably connected to the inner wall of the adjustment cavity 16. A plurality of threaded sleeves 29 are threadedly connected to the surface of the threaded rod 28, and the plurality of threaded sleeves 29 are respectively fixedly connected to the plurality of linkage plates 27. An adjustment knob 30 is fixedly connected to the surface of the threaded rod 28.

[0066] It should be understood that the third stirring blade 8 can be detachably connected, and the specific connection method is as follows:

[0067] First, insert the socket 18 into the insertion port 19. The follower gear 22 will be inserted into the side of the adjustment rack 23 in a stationary state to form meshing. Then, rotate the threaded rod 28 through the adjustment knob 30. The threaded rod 28 will synchronously drive a plurality of threaded sleeves 29 to move. The plurality of threaded sleeves 29 will synchronously drive the linkage plates 27 to move. The plurality of linkage plates 27 will drive the clamping pin 26 to move and insert into the clamping groove 20 under the support of the support rod 24 and the air spring 25, so as to position the position of the socket 18 in the adjustment cavity 16, and thus realize the synchronous positioning and installation of a plurality of third stirring blades 8;

[0068] When the clamping pin 26 is completely inserted and clamped with the clamping groove 20, the linkage plate 27 contacts the top of the first cross plate 1701. When the angle adjustment of the third stirring blade 8 is required, continue to rotate the threaded rod 28. The threaded rod 28 will drive the threaded sleeve 29 to continue to move downward. The threaded sleeve 29 synchronously drives a plurality of linkage plates 27 to continue to move. The plurality of linkage plates 27 will push the moving frame 17 to move while compressing the air spring 25. The adjustment rack 23 on the moving frame 17 will drive the follower gear 22 to be transmitted in and out, so that the follower gear 22 synchronously drives the adjustment shaft 21 and the third stirring blade 8 to rotate, and the third stirring blade 8 will have an angle adjustment. For example, Figure 10 and Figure 11 In [reference number], the third stirring blade 8 rotates from the first state to the second state to complete the angle adjustment, realizing the synchronous angle adjustment of a plurality of third stirring blades 8 that have been inserted. That is, it realizes adjusting the inclination angle of the third stirring blade 8 according to the soil condition to adjust the stirring ability, and also realizes that after the inserted and installed third stirring blades 8 are limited, the synchronous angle adjustment of a plurality of third stirring blades 8 can be carried out, reducing the adjustment difficulty;

[0069] When the third stirring blade 8 is severely worn and needs to be replaced, the threaded rod 28 can be rotated in the reverse direction. 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 air spring 25. The air spring 25 will first return to its maximum elongation. Then, when the linkage plate 27 continues to move upward, it will pull the clamping pin 26 out of the clamping groove 20 through the air spring 25. After the clamping pin 26 falls out of the clamping groove 20, the linkage point of the air spring 25 and the support rod 24 will be hooked to the bottom of the first cross plate 1701. The first cross plate 1701 will be pulled and driven until the top end of the first cross plate 1701 contacts the limit block 47, completing the reset. All the multiple socket connectors 18 can be taken out, facilitating the replacement and maintenance of the third stirring blade 8.

[0070] Specifically, positioning screws 31 are fixedly connected to both the top end and the bottom end of the adjustment cavity 16. A sealing plate 32 is provided at the opening of the adjustment cavity 16. The top end and the bottom end of the sealing plate 32 are sleeved on the positioning screws 31. Fastening nuts 33 are threadedly connected to the ends of the two positioning screws 31, and the fastening nuts 33 limit the sealing cover.

[0071] As Figures 5 to 12 shown, in one embodiment, a limiting component is provided on the socket connector 18. The limiting component includes a plugging rail 34, a limiting groove 35, and a mounting groove 36. The plugging rail 34 is fixedly connected to the first surface 37 of the socket connector 18. The first surface 37 is located inside the adjustment cavity 16. A limiting rack 38 is provided above the plugging rail 34. The limiting rack 38 is adapted to the follower gear 22. The limiting groove 35 is opened at the end of the adjustment shaft 21. The limiting pin 40 is adapted to the limiting groove 35. The mounting groove 36 is opened at the bottom end of the first surface 37. A support spring 39 is fixedly connected inside the mounting groove 36. The top end of the support spring 39 is fixedly connected to the limiting pin 40. A connecting plate 41 is fixedly connected between the limiting pin 40 and the limiting rack 38;

[0072] A linkage component is provided on the side of the limiting pin 40. The linkage component is used to link the movement of the limiting pin 40 and the limiting rack 38 during the process of the socket connector 18 being plugged into the plugging port 19 and meshing with the follower gear 22 and then continuing to move during the plugging process, canceling the limitation on the follower gear 22.

[0073] 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 connector 18 will mesh with the follower gear 22 to limit the state of the third stirring blade 8 relative to the socket connector 18 and maintain the initial state;

[0074] During the process of the socket 18 being inserted into the insertion port 19, the follower gear 22 will first be inserted and engaged into the tooth gaps of the adjusting rack 23, and the adjusting rack 23 will limit the state of the follower gear 22. During the process of the socket 18 continuing to move within the insertion port 19, the linkage assembly will drive 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, canceling the limit of the limit rack 38 on the follower gear 22 and synchronously canceling the limit of the limit pin 40 on the adjusting shaft 21. Before installing the third stirring blade 8, the stable state of the third stirring blade 8 relative to the socket 18 is maintained. After installing the third stirring blade 8, the limit on the third stirring blade 8 is canceled, providing conditions for the relative rotation of the third stirring blade 8 and the socket 18, enabling the angle adjustment assembly to adjust the angle of the third stirring blade 8.

[0075] Specifically, the linkage assembly includes a sliding seat 42, a linkage groove 43, and a baffle 44. The sliding seat 42 is slidably inserted on the socket 18, and a linkage pin 45 is rotatably connected to the end of the sliding seat 42;

[0076] 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. The inclined groove 46 is slidably connected to the linkage pin 45;

[0077] The baffle 44 is fixedly connected to the surface of the clamping pin 26 and contacts the end of the sliding seat 42.

[0078] It should be understood that the specific method for the limit assembly to cancel the limit of the third stirring blade 8 relative to the socket 18 is as follows:

[0079] First, insert the socket 18 into the insertion port 19. The follower gear 22 will first be inserted and engaged into the tooth gaps of the adjusting rack 23, and the adjusting rack 23 will limit the state of the follower gear 22;

[0080] Second, during the process of the socket 18 continuing to move within the insertion port 19, the baffle 44 will limit the sliding seat 42, and the sliding seat 42 will keep the linkage pin 45 stationary. During the process of the limit pin 40 continuing to move driven by the socket 18, the linkage pin 45 will act on the inclined groove 46, causing the limit pin 40 to move downward. The limit pin 40 drives the limit rack 38 to move downward synchronously, thereby canceling the limit on the follower gear 22 and the adjusting shaft 21 and providing conditions for the relative rotation of the third stirring blade 8 and the socket 18.

[0081] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cement mixing pile drill bit assembly for deep soft soil strata, comprising an outer pipe (1) and an inner pipe (2), the outer pipe (1) is rotatably sleeved on the surface of the inner pipe (2), and a spray hole (201) is opened at the bottom end of the surface of the inner pipe (2), and it is characterized in that: It further includes a soil drilling assembly, a first stirring assembly, a second stirring assembly, a third stirring assembly and two angle adjusting assemblies. The soil drilling assembly is arranged at the bottom end of the inner pipe (2), and is used for drilling the soil layer. The first stirring assembly is arranged on the surface of the inner pipe (2), the second stirring assembly is arranged on the surface of the outer pipe (1), the third stirring assembly includes two stirring frames (48), the top and bottom ends of the two stirring frames (48) are docked, the bottom ends of the two stirring frames (48) are rotatably arranged on the surface of the inner pipe (2), the top ends of the two stirring frames (48) are clamped on the surface of the outer pipe (1), a plurality of third stirring blades (8) are arranged on each of the two stirring frames (48), and the two angle adjusting assemblies are respectively arranged on the two stirring frames (48) and are respectively used for synchronously adjusting the angles of the plurality of third stirring blades (8) on the two stirring frames (48); The angle adjusting assembly includes an adjusting cavity (16), a plurality of moving frames (17), a plurality of plugging seats (18), three limiting blocks (47) and a threaded adjusting assembly. The adjusting cavity (16) is opened on the surface of the stirring frame (48), a plurality of linearly arranged plugging openings (19) are opened on the inner side wall of the adjusting cavity (16), the plurality of plugging seats (18) are respectively plugged in the plurality of plugging openings (19), a clamping groove (20) is opened at the top of the plugging seat (18), the clamping groove (20) is located inside the adjusting cavity (16), an adjusting shaft (21) is rotatably connected to the plugging seat (18), the first end of the adjusting shaft (21) is fixedly connected to the end of the third stirring blade (8), the second end of the adjusting shaft (21) is located inside the adjusting cavity (16), and a follower gear (22) is fixedly connected to the second end of the adjusting shaft (21); The plurality of moving frames (17) are all arranged inside the adjusting cavity (16), and each of the plurality of moving frames (17) includes a first horizontal plate (1701) and two second vertical plates (1702). The two second vertical plates (1702) are both slidably arranged inside the adjusting cavity (16), an adjusting rack (23) is fixedly arranged on the surface of one of the second vertical plates (1702), the plurality of adjusting racks (23) are respectively meshed with the plurality of follower gears (22), two support rods (24) are slidably plugged at the top of each of the plurality of first horizontal plates (1701), the bottom ends of the two support rods (24) on the same first horizontal plate (1701) penetrate through the first horizontal plate (1701), the bottom ends of the two support rods (24) on the same first horizontal plate (1701) are fixedly connected with two air springs (25), the bottom ends of the two air springs (25) are fixedly connected with clamping pins (26), the plurality of clamping pins (26) are respectively plugged in the clamping grooves (20) at the top of the plurality of plugging seats (18), and a linkage plate (27) is fixedly connected to the top ends of the two support rods (24) on the same first horizontal plate (1701); The threaded adjustment assembly is arranged in the adjustment cavity (16) and is used for moving and adjusting the plurality of linkage plates (27).

2. The bit assembly of a cement mixing pile in a deep soft soil stratum according to claim 1, characterized in that: The soil drilling assembly includes a connecting body (3) and two soil drilling teeth (4). 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 pipe (2).

3. The cement mixing pile drill bit assembly for deep soft soil stratum according to claim 1, characterized in that: The first stirring assembly includes a plurality of first stirring blades (5). The plurality of first stirring blades (5) are fixedly connected to the surface of the inner pipe (2). The plurality of first stirring blades (5) are divided into four pairs. Each pair of first stirring blades (5) is located at the same length point of the inner pipe (2) in the extending direction. Each pair of first stirring blades (5) is arranged in a circular array on the surface of the inner pipe (2).

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

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

6. The cement mixing pile drill bit assembly for deep soft soil stratum according to claim 5, characterized in that: The threaded adjustment assembly includes a threaded rod (28). The threaded rod (28) is rotatably connected to the inner wall of the adjustment cavity (16). A plurality of threaded sleeves (29) are threadedly connected to the surface of the threaded rod (28). The plurality of threaded sleeves (29) are respectively fixedly connected to the plurality of linkage plates (27). An adjustment knob (30) is fixedly connected to the surface of the threaded rod (28).

7. The bit assembly of the cement mixing pile in the deep soft soil stratum according to claim 6, wherein: A limiting assembly is arranged on the socket (18). The limiting assembly includes a plugging rail (34), a limiting groove (35) and a mounting groove (36). The plugging rail (34) is fixedly connected to the first surface (37) of the socket (18). The first surface (37) is located inside the adjustment cavity (16). A limiting rack (38) is arranged above the plugging rail (34). The limiting rack (38) is adapted to the follower gear (22). The limiting groove (35) is opened at the end of the adjustment shaft (21). A limiting pin (40) is adapted to the limiting groove (35). The mounting groove (36) is opened at the bottom end of the first surface (37). A support spring (39) is fixedly connected inside the mounting groove (36). The top end of the support spring (39) is fixedly connected to the limiting pin (40). A connecting plate (41) is fixedly connected between the limiting pin (40) and the limiting rack (38). A linkage assembly is arranged on the side of the limiting pin (40). The linkage assembly is used for driving the limiting pin (40) and the limiting rack (38) to move during the process of the socket (18) being inserted into the insertion port (19) and meshing with the follower gear (22) and then continuing to be inserted and moved, so as to cancel the limitation on the follower gear (22).

8. A cement mixing pile drill bit assembly for deep soft soil strata according to claim 7, characterized in that: The linkage assembly includes a sliding seat (42), a linkage groove (43), and a baffle (44). The sliding seat (42) is slidably inserted into the socket (18), and a linkage pin (45) is rotatably connected to the end of the sliding seat (42). 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). The inclined groove (46) is slidably connected to the linkage pin (45). The baffle (44) is fixedly connected to the surface of the clamping pin (26) and contacts the end of the sliding seat (42).

9. A cement mixing pile drill bit assembly for deep soft soil strata according to any one of claims 1 to 8, characterized in that: A first annular groove (9) and a second annular groove (10) are respectively formed on the surfaces of the inner tube (2) and the outer tube (1). First arc-shaped brackets (11) are fixedly connected to both the top end and the bottom end of the stirring frame (48). A second arc-shaped bracket (49) is fixedly connected to the first arc-shaped bracket (11). Positioning plates (12) are fixedly connected between both ends of the second arc-shaped bracket (49) and the first arc-shaped bracket (11). The second arc-shaped brackets (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) 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 bracket (49) at the top of the stirring frame (48). Two clamping openings (15) are formed in the second annular groove (10). The clamping blocks (14) on the two stirring frames (48) are respectively inserted into the two clamping openings (15).

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