A single-shaft pile machine with three-shaft stirring function

Abstract

The application relates to a single-shaft pile machine reformation device with a three-shaft stirring function, which comprises a power head, a rack, a walking system, an operating room and a guide frame of an original single-shaft stirring pile machine, and further comprises a double-shaft power expansion module which is detachably installed on one side of the power head of the original single-shaft stirring pile machine through a quick-mounting type connecting structure; an expanded stirring drill rod is connected with two output shafts of the double-shaft power expansion module through a shaft coupling and is arranged in parallel with the original single-shaft stirring drill rod, and the two stirring drill rods jointly form a group of three-shaft stirring drill rods; a modular multi-hole guide frame is connected with the guide frame of the original single-shaft pile machine or replaces the original guide frame, and drill rod clamping guide devices corresponding to the three stirring drill rods are arranged on the guide frame; and a lengthened drill bit cross beam is detachably connected with the bottom of the three stirring drill rods. The utility model adopts a modular structure, does not need to destructively reform the original single-shaft pile machine, utilizes an existing equipment main body, and greatly reduces the cost of purchasing a three-shaft pile machine.

Description

Technical Field

[0001] This application relates to the field of geotechnical engineering machinery technology, and in particular to a single-axis pile driver retrofit device with a three-axis mixing function. Background Technology

[0002] Mixing pile machines are widely used in soft soil foundation treatment, cutoff wall projects, and other engineering applications. Single-axis mixing pile machines have a simple structure and are flexible in relocation, but they suffer from low pile formation efficiency and poor pile uniformity. While professional triple-axis mixing pile machines offer high efficiency and good pile quality, they are expensive to purchase, bulky, poorly adaptable to narrow or soft terrain, and their relocation, disassembly, and assembly processes are complex and time-consuming. Currently, construction companies often equip themselves with both single-axis and triple-axis piling machines to meet the needs of different projects, resulting in redundant investment in equipment assets and low utilization rates. Upgrading the large number of existing single-axis piling machines to triple-axis mixing equipment through a low-cost, reversible retrofit would significantly improve equipment utilization and construction economics. However, existing technologies lack a standardized retrofit solution that is structurally sound, reliably connected, and easy to assemble and disassemble. Utility Model Content

[0003] Therefore, it is necessary to provide a single-axis pile driver retrofit device with a three-axis mixing function to overcome the defects mentioned in the background art.

[0004] A retrofit device for a single-axis pile driver with triaxial mixing function includes the original single-axis mixing pile driver's power head, frame, walking system, operating room, and guide frame, and also includes: The dual-shaft power extension module can be detachably installed on one side of the power head of the original single-shaft mixing pile machine via a quick-connect structure; An extended stirring drill rod is connected to the two output shafts of the dual-axis power extension module via a coupling, and is arranged in parallel with the original single-axis stirring drill rod to form a set of three-axis stirring drill rods. Modular multi-hole guide frame, which connects with or replaces the original guide frame of the single-axis pile driver, is equipped with a drill rod clamping and guiding device corresponding to the three mixing drill rods; An extended drill bit crossbeam is detachably connected to the bottom of three mixing drill rods.

[0005] As a preferred embodiment of the single-axis pile driver retrofit device with three-axis mixing function in this utility model, the dual-axis power extension module is equipped with a gear transmission mechanism, and its input shaft is connected to the output shaft of the original single-axis pile driver power head through a quick-change coupling.

[0006] As a preferred embodiment of the single-axis pile driver modification device with three-axis mixing function in this utility model, the gear transmission mechanism is a helical cylindrical gear transmission, and its transmission ratio is configured to enable the three mixing drill rods to rotate synchronously.

[0007] As a preferred embodiment of the single-axis pile driver retrofit device with three-axis mixing function in this utility model, the quick-installation connection structure is a high-strength bolt group, and the box of the dual-axis power expansion module is rigidly fixed to the side wall of the original power head, with a positioning pin provided at the connection interface.

[0008] As a preferred embodiment of the single-axis pile driver modification device with three-axis mixing function in this utility model, the drill rod clamping and guiding device is a split sliding bearing seat with an embedded wear-resistant bushing and a lubrication and oil injection structure.

[0009] As a preferred embodiment of the single-axis pile driver retrofit device with three-axis mixing function in this utility model, the split sliding bearing seat is fixed on the guide rail of the modular multi-hole guide frame by locking bolts, and its position is adjustable.

[0010] As a preferred embodiment of the single-axis pile driver retrofit device with three-axis mixing function in this utility model, the modular multi-hole guide frame is connected side by side to the original single-axis pile driver guide frame by bolts or installed by replacing the original mounting base.

[0011] As a preferred embodiment of the single-axis pile driver modification device with three-axis mixing function in this utility model, the extended drill bit crossbeam is connected to the drill bit of each mixing drill rod through a flange and connecting bolts.

[0012] As a preferred embodiment of the single-axis pile driver retrofit device with three-axis mixing function in this utility model, the body of the extended drill bit crossbeam adopts a box-shaped structure.

[0013] The beneficial effects of this utility model are: This utility model adopts a modular structure, eliminating the need for destructive modifications to the original single-axis pile driver. By utilizing the existing equipment body, the cost of purchasing a three-axis pile driver is significantly reduced. Through a quick-connect structure and gear transmission, it ensures that the two additional drill rods can obtain synchronous and stable power with the original drill rods, guaranteeing the synchronization of mixing and the quality of pile formation. This utility model is practical and convenient. When it is necessary to move to another site or enter a narrow area, it can be quickly restored to single-axis mode. When large-area, high-efficiency construction is required, it can be quickly switched to three-axis mode. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1This is one of the structural schematic diagrams of the single-axis pile driver modification device according to an embodiment of this application; Figure 2 This is one of the structural schematic diagrams of the single-axis pile driver modification device according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the dual-axis power extension module according to an embodiment of this application; Figure 4 This is a schematic diagram of the connection structure between the original single-axis stirring drill rod and the extended stirring drill rod in an embodiment of this application. Explanation of reference numerals in the attached figures: 1000, Power Head; 2000, Dual-axis power extension module; 3000, Extended stirring drill rod; 4000, Modular Multi-hole Guide Frame; 5000, Extended drill bit crossbeam. Detailed Implementation

[0016] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0017] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0019] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0020] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0021] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] According to one aspect of this application, an embodiment of this application provides a single-axis pile driver retrofit device with a three-axis mixing function, please refer to the following: Figures 1 to 4 The single-axis pile driver retrofit device with three-axis mixing function includes the original single-axis mixing pile driver's power head 1000, frame, walking system, operating room, guide frame, dual-axis power extension module 2000, extended mixing drill rod 3000, modular multi-hole guide frame 4000, and extended drill bit crossbeam 5000. The dual-axis power extension module 2000 is detachably installed on one side of the original single-axis mixing pile driver's power head 1000 through a quick-connect structure. The extended mixing drill rod 3000 is connected to the two output shafts of the dual-axis power extension module 2000 through a coupling and is arranged parallel to the original single-axis mixing drill rod to form a set of three-axis mixing drill rods. The modular multi-hole guide frame 4000 is connected to or replaces the original single-axis pile driver's guide frame and is equipped with a drill rod clamping and guiding device corresponding to the three mixing drill rods. The extended drill bit crossbeam 5000 is detachably connected to the bottom of the three mixing drill rods.

[0023] In this embodiment, the single-axis pile driver modification device with triaxial mixing function includes the original single-axis mixing pile driver's power head 1000, frame, walking system, operating room, guide frame, dual-axis power extension module 2000, extended mixing drill rod 3000, modular multi-hole guide frame 4000, and extended drill bit crossbeam 5000. Through a set of highly modular additional components, without damaging the main structure of the original single-axis mixing pile driver, the device utilizes its original power source and walking chassis to achieve a functional upgrade from single-axis mixing to triaxial mixing through quick assembly and disassembly. The dual-axis power extension module 2000, along with the original power head 1000, provides power to the extended mixing drill rod 3000. The newly added extended mixing drill rod 3000 and the original drill rod form a triaxial drill rod group. The original single-hole guide frame is replaced with a modular multi-hole guide frame 4000, and a special drill rod clamping and guiding device is installed. The extended drill bit crossbeam 5000 is added to the bottom of the drill rod, connecting the three drill rods into one unit.

[0024] In one embodiment, the dual-axis power expansion module 2000 has an internal gear transmission mechanism. Its input shaft is connected to the output shaft of the original single-axis pile driver power head 1000 via a quick-change coupling. The dual-axis power expansion module 2000 is an independent, sealed gearbox. Internally, it has a single-stage helical cylindrical gear transmission mechanism, specifically including one input shaft, one intermediate transmission shaft, and two output shafts. The input shaft is precisely connected to the output shaft of the original single-axis pile driver power head 1000 via a quick-change coupling. Power is input from this shaft and synchronously distributed to the two output shafts via a gear set at a 1:1 transmission ratio, enabling the three mixing drill rods to rotate synchronously. Splash lubrication is used inside the gearbox to ensure smooth transmission, low noise, and long service life. The coupling can be a flange-type coupling with a positioning stop and a quick-locking pin.

[0025] In one embodiment, the dual-axis power extension module 2000 is rigidly connected to the side wall of the power head 1000 via a quick-connect structure. This quick-connect structure includes a positioning component and a fastening component. The positioning component, located at the mating surface of the housing, includes at least two tapered positioning pins, which provide precise positioning during initial installation to ensure proper alignment of the shaft holes of the quick-change coupling. The fastening component uses several sets of high-strength precision bolts (M20-M24) evenly distributed around the perimeter of the housing. These bolts securely fasten the housing of the dual-axis power extension module 2000 to the reinforced side plate of the power head 1000, forming a stable anti-torsional structure.

[0026] In one embodiment, the drill pipe clamping guide device is a split sliding bearing seat with an embedded wear-resistant bushing and a lubrication and oil injection structure. The split sliding bearing seat is fixed to the guide rail of the modular multi-hole guide frame 4000 by locking bolts, and its position is adjustable.

[0027] In one embodiment, the modular multi-hole guide frame 4000 is connected side-by-side to the original single-axis pile driver's guide frame via bolts or installed by replacing the original mounting base. The modular multi-hole guide frame 4000 is a large welded steel structure with a box-shaped cross-section to ensure sufficient bending and torsional stiffness. It has three parallel vertical guide rails precisely machined on it, each corresponding to a mixing drill rod. The modular multi-hole guide frame 4000 is connected to the original machine in two ways: one is by directly replacing the original guide frame's mounting base with bolts; the other is as a parallel extension of the original single-hole guide frame, rigidly connected to it via lateral connecting plates and high-strength bolts.

[0028] In one embodiment, the extended drill bit crossbeam 5000 is connected to the drill bits of each mixing drill rod via flanges and connecting bolts. The crossbeam body of the extended drill bit crossbeam 5000 adopts a box-shaped structure. The extended drill bit crossbeam 5000 is a key component to ensure the synchronous operation and stable spacing of the bottom of the three drill rods. Its crossbeam body is manufactured with a box-shaped structure, which has extremely high bending stiffness. There are three connection points on the crossbeam, corresponding to the original drill rod drill bit in the middle and the extended drill rod drill bits on both sides, and the connection method is flange bolt connection. A connecting flange is pre-welded or cast on the upper part of each drill bit. Matching flanges are also provided at the corresponding positions on the extended crossbeam. During installation, the drill bit flange is aligned with the crossbeam flange, a set of M16-M20 connecting bolts are inserted and tightened evenly. This connection method is not only firm and reliable, but also allows the cutting resistance of the three drill bits to be mutually transferred and balanced, forming an integrated cutting system, which greatly improves the stability of operation in complex and heterogeneous formations.

[0029] Modification and installation process: Preparation: Disassemble the mixing drill rod, drill bit and guide frame of the original single-axis pile driver.

[0030] Install the expansion module: hoist the dual-axis power expansion module 2000, first use the positioning pin for initial positioning, and then use the bolt group of the quick-connect structure to fasten it to the power head 1000.

[0031] Install the guide system: hoist the modular multi-hole guide frame 4000 and fix it on the main frame.

[0032] Install the drill rod and crossbeam: First, connect the extended drill bit crossbeam 5000 to the three drill bits on the ground, then hoist the whole unit. Connect the middle drill bit to the original drill rod, and connect the two side drill bits to the extended drill rod. Finally, connect the upper end of the extended mixing drill rod 3000 to the output shaft of the dual-shaft power extension module 2000 via a coupling.

[0033] Install the guide device: mount the modular multi-hole guide frame 4000 onto the three drill rods and lock it onto the guide frame.

[0034] Three-axis working modes: The original pile driver power system is started, and the power is transmitted to the dual-shaft power expansion module 2000 through the quick-change coupling, driving the three mixing drill rods to rotate synchronously.

[0035] The winch system lowers the entire triaxial drill rod assembly via the power head 1000 and extension module, while the mixing blades cut the soil and inject a solidifying agent.

[0036] The modular multi-hole guide frame 4000 constantly constrains the drill pipe, ensuring its verticality. The extended drill bit crossbeam 5000 ensures synchronous drilling at the bottom and prevents deviation.

[0037] After the single pile construction is completed, the winch system lifts the drill rod assembly to begin the next cycle.

[0038] Restore single-axis mode: Disassemble the dual-axis power extension module 2000, the extended stirring drill rod 3000, the extended drill bit crossbeam 5000, and the modular multi-hole guide frame 4000 in reverse order.

[0039] Reinstall the original single-shaft stirring drill rod and guide frame.

[0040] The entire process can be completed in a short time by a regular machine repair team, enabling flexible and rapid switching between single-axis and three-axis functions.

[0041] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A device for retrofitting a single-axis pile driver with a three-axis mixing function, comprising the original single-axis mixing pile driver's power head, frame, walking system, operating room, and guide frame, characterized in that, Also includes: The dual-shaft power extension module can be detachably installed on one side of the power head of the original single-shaft mixing pile machine via a quick-connect structure; An extended stirring drill rod is connected to the two output shafts of the dual-axis power extension module via a coupling, and is arranged in parallel with the original single-axis stirring drill rod to form a set of three-axis stirring drill rods. Modular multi-hole guide frame, which connects with or replaces the original guide frame of the single-axis pile driver, is equipped with a drill rod clamping and guiding device corresponding to the three mixing drill rods; An extended drill bit crossbeam is detachably connected to the bottom of three mixing drill rods.

2. The single-axis pile driver retrofit device with triaxial mixing function according to claim 1, characterized in that, The dual-axis power extension module is equipped with a gear transmission mechanism, and its input shaft is connected to the output shaft of the original single-axis pile driver power head through a quick-change coupling.

3. The single-axis pile driver retrofit device with triaxial mixing function according to claim 2, characterized in that, The gear transmission mechanism is a helical cylindrical gear transmission, and its transmission ratio is configured to enable the three stirring drill rods to rotate synchronously.

4. The single-axis pile driver retrofit device with triaxial mixing function according to claim 1, characterized in that, The quick-connect structure is a high-strength bolt group, which rigidly fixes the housing of the dual-axis power extension module to the side wall of the original power head, and a positioning pin is provided at the connection interface.

5. The single-axis pile driver retrofit device with triaxial mixing function according to claim 1, characterized in that, The drill pipe clamping and guiding device is a split sliding bearing seat with an embedded wear-resistant bushing and a lubrication and oil injection structure.

6. The single-axis pile driver retrofit device with triaxial mixing function according to claim 5, characterized in that, The split sliding bearing seat is fixed to the guide rail of the modular multi-hole guide frame by locking bolts, and its position is adjustable.

7. The single-axis pile driver retrofit device with triaxial mixing function according to claim 1, characterized in that, The modular multi-hole guide frame is installed by connecting it side-by-side with the original single-axis pile driver guide frame using bolts or by replacing the original mounting base.

8. The single-axis pile driver retrofit device with three-axis mixing function according to claim 1, characterized in that, The extended drill bit crossbeam is connected to the drill bit of each stirring drill rod via a flange and connecting bolts.

9. The single-axis pile driver retrofit device with triaxial mixing function according to claim 8, characterized in that, The extended drill bit crossbeam has a box-shaped structure.

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