Rectangular pile hole-forming equipment

Abstract

The present invention relates to a rectangular pile hole-forming device, comprising a base support, a transmission system, and an upper support assembly; the transmission system is vertically inserted into the base support, and the lower end of the transmission system extends out of the base support; the upper support assembly is arranged on the base support, avoiding the transmission system; the upper support assembly comprises a support portion and a lifting portion; the lifting portion is vertically inserted into the base support; the support portion is arranged at the upper end of the lifting portion, and is telescopically extended and retracted in the horizontal direction to support or detach from the four side walls of the rectangular pile hole; the lifting portion is telescopic in the vertical direction, and can drive the base support and the transmission system to move downward in a step-by-step manner in the vertical direction. The beneficial effects thereof are that the hole-drilling control is more precise and the hole-drilling quality is higher; there is no need to use a rotary drilling rig, and the hole-guiding and hole-drilling processes can be carried out simultaneously, resulting in higher hole-drilling efficiency and reduced rotary drilling rig rental costs.

Description

Technical Field

[0001] The present invention relates to the technical field of pile foundation hole forming equipment, in particular to a rectangular pile hole forming equipment. Background Art

[0002] Pile foundation drilling involves pre-drilling holes and then forming the pile foundation through filling, vibrating, tamping, or pouring. This method of pile construction is more economical and time-efficient than driving concrete or steel piles, making it a widely used method in modern construction. Rectangular piles offer strong bearing capacity, excellent stability, and high construction efficiency. They are suitable for most geological conditions, including soft soil, and hold great promise for future application.

[0003] At present, in the mechanized hole-making construction of rectangular piles, the rotary drilling rig not only needs to guide the hole, but also needs to be equipped with a drilling bit to drill the hole. The guiding and drilling processes cannot be carried out at the same time, which increases the entire construction period and construction cost. At the same time, the drilling bit carried by the rotary drilling rig needs to rely on the rotary drilling rod to apply downward pressure to break the rock during drilling, but it is difficult to control in the actual implementation process. The drilling equipment is often damaged due to excessive downward pressure or causes the drilling equipment to tilt to one side, affecting the quality of the hole.

[0004] Therefore, a new rectangular pile hole-forming device is urgently needed to solve the above-mentioned technical problems. Summary of the Invention

[0005] (1) Technical issues to be resolved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a rectangular pile drilling device, which solves the technical problems of low efficiency of the prior rectangular pile drilling and unstable operation of the drilling equipment affecting the drilling quality.

[0007] (2) Technical solution

[0008] In order to achieve the above objectives, the main technical solutions adopted by the present invention include:

[0009] In the first aspect, an embodiment of the present invention provides a rectangular pile hole-forming device, comprising a base support, a transmission system and an upper support assembly; the transmission system is vertically penetrated in the base support, and the lower end of the transmission system extends out of the base support; the upper support assembly is arranged on the base support avoiding the transmission system; the upper support assembly comprises a supporting part and a lifting part; the lifting part is vertically penetrated in the base support; the supporting part is arranged at the upper end of the lifting part, which is extended and retracted in the horizontal direction to support or detach from the four side walls of the rectangular pile hole; the lifting part is extended and retracted in the vertical direction, and can drive the base support and the transmission system to move downward in a step-by-step manner in the vertical direction.

[0010] Optionally, in the rectangular pile hole-forming equipment, the support portion includes a plurality of support units located in the same plane; two adjacent support units are connected by support rods to form a polygonal frame, and the plurality of support units are arranged opposite to each other in pairs; the support unit includes a first telescopic member and a support shoe; the first telescopic member is arranged in a horizontal direction, and the fixed ends of two adjacent first telescopic members are connected by the support rod; the telescopic ends of adjacent first telescopic members extend in a horizontal direction toward the outside of the polygonal frame; the support shoe is provided at the telescopic end of the first telescopic member, and the shoe surfaces of the two opposite support shoes are arranged back to back.

[0011] Optionally, in the rectangular pile drilling equipment, the lifting part includes a plurality of second telescopic members; the plurality of second telescopic members correspond one-to-one to the plurality of support units; one end of the second telescopic member is fixed to the fixed end of the first telescopic member, and the other end is connected to the base bracket; the second telescopic member is telescoped in the vertical direction to drive the base bracket to rise and fall.

[0012] Optionally, in the rectangular pile hole-forming equipment, the six support units and the six support rods form a hexagon; the shoe surfaces of the six support shoes are used to support the four side walls of the rectangular pile hole; wherein, the two support shoes that are farthest apart and opposite to each other correspond to the two side walls with smaller areas of the rectangular pile hole, and the other four support shoes are divided into two groups and correspond to the two side walls with larger areas of the rectangular pile hole respectively.

[0013] Optionally, in the rectangular pile drilling equipment, the second telescopic member includes a driving member, a sliding frame and a sliding block; the driving member is arranged in a vertical direction, and its upper end is fixed to the fixed end of the first telescopic member; the sliding frame is fixed to the fixed end of the first telescopic member along the vertical direction; one side of the sliding block is slidably arranged in the sliding frame along the vertical direction, and the lower end of the sliding block is connected to the lower end of the driving member; the side of the sliding block facing the base support is connected to the base support; the driving member drives the base support to rise and fall through the sliding block.

[0014] Optionally, in the rectangular pile drilling equipment, the second telescopic member is located inside the polygonal frame; the sliding frame is a square sleeve having a vertical notch on a side facing the base bracket; the sliding block includes a square column adapted to the square sleeve, and a plate connected to the square column toward the outside of the square sleeve through the vertical notch; the plate is parallel to the side of the square sleeve facing the base bracket.

[0015] Optionally, in the rectangular pile drilling equipment, the lower part of the base bracket is a cubic frame; the upper support assembly is arranged above the cubic frame; the transmission system includes multiple transmission assemblies; multiple transmission assemblies are distributed around the vertical edge of the cubic frame; the transmission assembly includes a motor, a reducer, a transmission shaft and a drill bit from top to bottom; the drill bit extends out of the lower part of the cubic frame.

[0016] Optionally, the rectangular pile drilling equipment further includes a lower support assembly; the lower support assembly is arranged inside the cubic frame, avoiding the transmission assembly; the lower support assembly is higher than the drill bit in the vertical direction; the lower support assembly can extend horizontally from the cubic frame and support the four side walls of the rectangular pile hole.

[0017] Optionally, in the rectangular pile hole-forming equipment, the lower support assembly includes four guide plates and a plurality of third telescopic members; the four guide plates correspond to four sides parallel to the cubic frame respectively; the third telescopic member is arranged in a horizontal direction, with its fixed end arranged on the cubic frame, and the telescopic end is connected to the guide plate toward the side of the cubic frame; at least one third telescopic member corresponds to one guide plate to drive the guide plate to support or leave the side wall of the corresponding rectangular pile hole.

[0018] Optionally, in the rectangular pile drilling equipment, the base bracket also includes a vertically arranged boom; the boom passes through the middle of the cubic frame, and the upper end extends out of the cubic frame; the plate body of the sliding block is connected to the boom.

[0019] (3) Beneficial effects

[0020] The beneficial effects of the present invention are as follows: a rectangular pile drilling device of the present invention adopts the support part and the lifting part of the upper support assembly. On the one hand, the support part is supported on the four side walls of the rectangular pile hole, and the device can be fixed in the vertical direction; on the other hand, the feed amount of the transmission system for downward hole repair is controlled by the telescopic lifting part, which can avoid the damage to the transmission system caused by excessive downward pressure applied by the rotary drilling rig; the step-by-step hole repairing method is adopted to feed downward steadily, which can avoid the deviation of the repaired hole due to uneven hardness in the pile hole, thereby ensuring the quality of the repaired hole; compared with the existing technology, the hole repairing control is more precise and the hole repairing quality is higher; there is no need to use a rotary drilling rig, and the hole guiding and hole repairing processes can be carried out simultaneously, the hole forming efficiency is higher, and the rental cost of the rotary drilling rig is reduced.

[0021] The support shoes of the upper support assembly and the guide plates of the lower support assembly have a large contact surface with the pile hole. When drilling, the equipment can cross the fault or collapsed area in the pile hole and provide vibration reduction support to ensure the stability of the equipment drilling.

[0022] The multiple support units of the support part and the multiple telescopic parts of the lifting part are distributed in groups and form a polygonal frame. The multiple telescopic parts are simultaneously connected to the boom located in the middle to ensure the smooth lifting of the entire base bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of a rectangular pile hole-forming device according to embodiment 1 of the present invention;

[0024] Figure 2 for Figure 1 A three-dimensional schematic diagram of the base bracket in FIG.

[0025] Figure 3 for Figure 1 A three-dimensional schematic diagram of the upper support assembly in FIG.

[0026] Figure 4 for Figure 1 A three-dimensional schematic diagram of the transmission assembly in FIG.

[0027] Figure 5 for Figure 1 A three-dimensional schematic diagram of the upper and lower support components in FIG.

[0028] Figure 6 for Figure 1 A three-dimensional schematic diagram of the usage status of the hole-forming equipment.

[0029] [Description of Reference Numerals]

[0030] 1: Base bracket; 11: Cube frame; 12: Boom; 2: Transmission system; 21: Transmission assembly; 211: Motor; 212: Reducer; 213: Transmission shaft; 214: Drill bit; 3: Upper support assembly; 31: Support part; 311: Support unit; 312: Support rod; 3111: First telescopic member; 3112: Support shoe; 32: Lifting part; 321: Second telescopic member; 3211: Driving member; 3212: Sliding frame; 3213: Sliding block; 3214: Square column; 3215: Plate; 4: Lower support assembly; 41: Guide plate; 42: Third telescopic member; 5: Rectangular pile hole; 6: Door crane; 7: Track. DETAILED DESCRIPTION

[0031] The rectangular pile drilling device proposed in the embodiment of the present invention addresses the technical problems of low rectangular pile drilling efficiency and unstable operation of the hole repairing equipment affecting the hole production quality; it adopts the support part and the lifting part of the upper support assembly. On the one hand, the support part is supported on the four side walls of the rectangular pile hole, and can fix the equipment in the vertical direction; on the other hand, the feed amount of the downward drilling transmission system is controlled by the telescopic lifting part, which can avoid the damage to the transmission system caused by excessive downward pressure applied by the rotary drilling rig; the step-by-step drilling method is adopted to feed downward steadily, which can avoid the deviation of the repaired hole due to uneven hardness in the pile hole, thereby ensuring the quality of the repaired hole; compared with the existing technology, the hole repair control is more precise and the hole repair quality is higher; there is no need to use a rotary drilling rig, and the hole guiding and hole repairing processes can be carried out simultaneously, the hole production efficiency is higher, and the rental cost of the rotary drilling rig is reduced.

[0032] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Instead, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0033] Example 1:

[0034] Reference Figure 1 、 Figure 2 and Figure 3 This embodiment provides a rectangular pile drilling device, including a base bracket 1, a transmission system 2 and an upper support assembly 3, wherein the base bracket 1 is used to provide distribution space and support for other components, the transmission system 2 is used to complete the hole repair work, and the upper support assembly 3 is used to provide support and fixation for the entire device during the construction process.

[0035] The transmission system 2 is vertically inserted into the base support 1, with the lower end of the transmission system 2 extending out of the base support 1 to facilitate hole repair. The upper support assembly 3 is disposed on the base support 1, avoiding the transmission system 2. The upper support assembly 3 includes a support portion 31 and a lifting portion 32, with the lifting portion 32 vertically inserted into the base support 1. The support portion 31 is disposed at the upper end of the lifting portion 32 and is horizontally retractable to support or detach from the four side walls of the rectangular pile hole 5. Specifically, when the support portion 31 supports the four side walls of the rectangular pile hole 5, the entire device is fixed to the rectangular pile hole 5. Conversely, when the support portion 31 detaches from the four side walls of the rectangular pile hole 5, the support portion 31 can move up and down within the rectangular pile hole 5.

[0036] The lifting part 32 is retracted and extended in the vertical direction, and can drive the base bracket 1 and the transmission system 2 to move downward in a step-by-step manner in the vertical direction. The specific working process is that the support part 31 is supported on the side wall of the rectangular pile hole 5, the entire equipment is positioned, the transmission system 2 starts to dig and repair the hole, and the lifting part 32 is synchronously extended, driving the transmission system 2 to move downward through the base bracket 1; when the lifting part 32 is extended to the maximum length, it stops extending, and the support part 31 is retracted from the side wall of the rectangular pile hole 5. At this time, because the transmission system 2 and the base bracket 1 are stationary relative to the rectangular pile hole 5, the lifting part 32 contracts and drives the support part 31 to move downward, completing the first step of digging and repairing the hole; then the support part 31 is repeatedly supported on the side wall of the rectangular pile hole 5, and the first step of digging and repairing the hole is repeated, thus realizing step-by-step downward movement to repair the hole.

[0037] On the one hand, the support part 31 is supported on the four side walls of the rectangular pile hole 5, and can fix the equipment in the vertical direction; on the other hand, the feed amount of the transmission system 2 for downward hole repair is controlled by the extension and contraction of the lifting part 32, which can avoid the damage to the transmission system 2 caused by excessive downward pressure from the rotary drilling rig; the step-by-step hole repairing method is used to feed downward steadily, which can avoid the deviation of the repaired hole due to uneven hardness in the pile hole, thereby ensuring the quality of the repaired hole; the hole repairing process is completed independently without the need for the cooperation of a rotary drilling rig, and the hole guiding and hole repairing processes can be carried out simultaneously, which has higher hole-making efficiency and reduces the rental cost of the rotary drilling rig.

[0038] Reference Figure 3 This embodiment provides a rectangular pile drilling device. The support portion 31 includes multiple support units 311 located in the same plane. This facilitates the drilling device's support of the circumferential hole wall. Adjacent support units 311 are connected by support rods 312 to form a polygonal frame, creating a stable support and load-bearing framework. The multiple support units 311 are arranged in pairs, facilitating support in opposite directions, resulting in more uniform overall force distribution and improved support effectiveness.

[0039] The support unit 311 comprises a first telescopic member 3111 and a gripper shoe 3112. The gripper shoe 3112 has a large surface area and is designed to directly contact the sidewall of the rectangular pile hole 5. The first telescopic member 3111 is arranged horizontally, with the fixed ends of two adjacent first telescopic members 3111 connected by a support rod 312. The telescopic ends of adjacent first telescopic members 3111 extend horizontally toward the exterior of the polygonal frame. The gripper shoes 3112 are positioned at the telescopic ends of the first telescopic members 3111, with the opposing gripper shoes 3112 facing each other. The first telescopic member 3111 may optionally include a hydraulic element to facilitate reciprocating support of the support unit 311.

[0040] Reference Figure 3This embodiment provides a rectangular pile drilling device. The lifting unit 32 includes multiple second telescopic members 321, each corresponding to a plurality of support units 311. One end of the second telescopic member 321 is fixed to the fixed end of the first telescopic member 3111, simplifying the device structure and providing a fixed fulcrum for the second telescopic member 321. The other end is connected to the base support 1. The second telescopic member 321 extends and retracts vertically to drive the base support 1 up and down.

[0041] Reference Figure 3 This embodiment provides a rectangular pile drilling device. Given the rectangular cross-section of the rectangular pile hole 5, six support units 311 and six struts 312 are preferably arranged to form a hexagonal frame. The shoe surfaces of the six grippers 3112 are used to support the four sidewalls of the rectangular pile hole 5. The two grippers 3112 that are furthest apart and opposite each other correspond to the two smaller sidewalls of the rectangular pile hole 5. The other four grippers 3112 are divided into two groups, each corresponding to the two larger sidewalls of the rectangular pile hole 5. This ensures the required support while reducing the number of support units 311 and streamlining the device structure.

[0042] Reference Figure 3 This embodiment provides a rectangular pile hole-forming device. In order to ensure that the second telescopic member 321 can smoothly and stably drive the base support 1 to rise and fall, the second telescopic member 321 includes a driving member 3211, a sliding frame 3213 and a sliding block. Among them, the driving member 3211 is arranged in the vertical direction, preferably a hydraulic element, and its upper end is fixed to the fixed end of the first telescopic member 3111. The sliding frame 3213 is fixed to the fixed end of the first telescopic member 3111 in the vertical direction, and one side of the sliding block is slidably arranged in the sliding frame 3213 in the vertical direction, and the lower end of the sliding block is connected to the lower end of the driving member 3211. The side of the sliding block facing the base support 1 is connected to the base support 1, and the driving member 3211 drives the sliding block to move along the sliding frame 3213 to drive the base support 1 to rise and fall.

[0043] Furthermore, the sliding frame 3213 is a square sleeve with a vertical notch on one side facing the base support 1. The sliding block includes a square column 3214 that fits within the square sleeve, and a plate 3215 connected to the square column 3214 through the vertical notch toward the outside of the square sleeve. The plate 3215 is parallel to the side of the square sleeve facing the base support 1. This provides ample contact area between the plate 3215 and the base support 1, improving the stability of the connection. At the same time, the sliding block is largely confined within the square sleeve, providing more stable force when supporting the base support 1 and preventing the sliding frame 3213 and the sliding block from separating horizontally or at an angle to the horizontal.

[0044] Reference Figure 1 and Figure 3Corresponding to the plate 3215, the base bracket 1 also includes a vertically arranged boom 12, which passes through the middle of the cube frame 11, and the upper end of the boom 12 extends out of the cube frame 11. The plate 3215 of the sliding block is connected to the boom 12, and the six plates 3215 are divided into two groups along the long side of the cube frame 11. Every three plates 3215 are fixed to the boom 12 from three directions, and the connection is more stable.

[0045] Reference Figure 1 、 Figure 2 and Figure 3 This embodiment provides a rectangular pile hole drilling device. The lower part of the base support 1 is a cubic frame 11, and the upper support assembly 3 is arranged above the cubic frame 11. The transmission system 2 includes multiple transmission assemblies 21. The multiple transmission assemblies 21 are distributed around the vertical edge of the cubic frame 11 to correspond to the four sides of the rectangular pile hole 5. Figure 4 The transmission assembly 21 includes a motor 211, a reducer 212, a transmission shaft 213 and a drill bit 214 from top to bottom. The drill bit 214 extends out of the lower part of the cube frame 11 to facilitate construction. The specific construction process of the transmission assembly 21 is existing technology and will not be described in detail here.

[0046] Reference Figure 1 、 Figure 2 and Figure 5 This embodiment provides a rectangular pile drilling device, which also includes a lower support assembly 4. The lower support assembly 4 is arranged inside the cubic frame 11 away from the transmission assembly 21. The lower support assembly 4 is higher than the drill bit 214 in the vertical direction. The lower support assembly 4 can extend horizontally from the cubic frame 11 and support the four side walls of the rectangular pile hole 5.

[0047] Furthermore, the lower support assembly 4 includes four guide plates 41 and multiple third telescopic members 42. The four guide plates 41 correspond to the four sides of the cubic frame 11. The third telescopic members 42 are arranged horizontally, with their fixed ends mounted on the cubic frame 11 and their telescopic ends connected to the side of the guide plates 41 facing the cubic frame 11. At least one third telescopic member 42 corresponds to each guide plate 41, driving the guide plate 41 to support or remove the side wall of the corresponding rectangular pile hole 5. If the guide plates 41 are long, two or more third telescopic members 42 can be provided for driving. The third telescopic members 42 are preferably hydraulic components.

[0048] It should be emphasized that the support shoe 3112 of the upper support assembly 3 and the guide plate 41 of the lower support assembly 4 are supported on the side walls of the pile hole, one above and one below, and have a large contact surface with the side walls of the pile hole. When drilling, the equipment can cross the fault or collapsed area in the pile hole and provide vibration-damping support effect to ensure the stability of the equipment drilling.

[0049] In addition, refer to Figure 6 During the use of the rectangular pile drilling equipment in this embodiment, it assists in lifting and transferring with equipment such as the gantry crane 6 and the track 7; at the same time, during the construction of the rectangular pile drilling equipment, the rope of the gantry crane 6 hangs the boom 12 of the base bracket 1, and cooperates with the support part 31 to play a certain auxiliary lifting role, but does not play a major role.

[0050] Specifically, the drilling process of the rectangular pile drilling device in this embodiment is as follows: first, the rectangular pile drilling device is hoisted into the locking opening of the rectangular pile hole 5 using the rope of the gantry crane 6; second, the support portion 31 is extended horizontally to support the four side walls of the rectangular pile hole 5. After the entire device is positioned, the transmission system 2 begins digging and drilling, while the lifting portion 32 simultaneously extends, driving the transmission system 2 downward through the base support 1; when the lifting portion 32 extends to its maximum length, it stops extending, and the support portion 31 retracts from the side walls of the rectangular pile hole 5; finally, because the transmission system 2 and the base support 1 are stationary relative to the rectangular pile hole 5, the lifting portion 32 retracts, driving the support portion 31 downward, completing the first step of digging and drilling. Then, the support portion 31 is again supported on the side walls of the rectangular pile hole 5, repeating the first step of digging and drilling, thus achieving a step-by-step downward movement and drilling process.

[0051] After completing the drilling work of the entire rectangular pile hole 5, with the cooperation of the gantry 6 and the track 7, the rectangular pile drilling equipment is transferred to the next hole position and the above construction process is repeated to complete the drilling work of a batch of rectangular piles.

[0052] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0053] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0054] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0055] In the description of this specification, the terms "one embodiment", "some embodiments", "embodiments", "examples", "specific examples" or "some examples" refer to the specific features, structures, materials or characteristics described in conjunction with the embodiment or example and included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples, unless they are mutually inconsistent.

[0056] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A rectangular pile hole-forming device, characterized in that: It comprises a base support (1), a transmission system (2) and an upper support assembly (3); The transmission system (2) is vertically arranged through the base support (1), and the lower end of the transmission system (2) extends out of the base support (1); The upper support assembly (3) is arranged on the base support (1) away from the transmission system (2); The upper support assembly (3) comprises a support portion (31) and a lifting portion (32); The lifting portion (32) is vertically inserted into the base bracket (1); The support portion (31) is arranged at the upper end of the lifting portion (32), and is adapted to extend and retract in the horizontal direction to support or separate from the four side walls of the rectangular pile hole (5); The lifting portion (32) is telescopic in the vertical direction, and can drive the base support (1) and the transmission system (2) to move downward in a step-by-step manner in the vertical direction; The support portion (31) comprises a plurality of support units (311) located on the same plane; Two adjacent support units (311) are connected via support rods (312) to form a polygonal frame, and a plurality of support units (311) are arranged opposite to each other in pairs; The support unit (311) comprises a first telescopic member (3111); the first telescopic member (3111) is arranged in a horizontal direction, and the fixed ends of two adjacent first telescopic members (3111) are connected via the support rod (312); The telescopic end adjacent to the first telescopic member (3111) extends horizontally toward the outside of the polygonal frame; The lifting portion (32) includes a plurality of second telescopic members (321); The plurality of second telescopic members (321) correspond one-to-one to the plurality of support units (311); One end of the second telescopic member (321) is fixed to the fixed end of the first telescopic member (3111), and the other end is connected to the base bracket (1); The second telescopic member (321) telescopes in a vertical direction to drive the base bracket (1) to rise and fall.

2. The rectangular pile drilling device according to claim 1, characterized in that: The support unit (311) further includes a support shoe (3112); The support shoe (3112) is provided at the telescopic end of the first telescopic member (3111), and the shoe surfaces of the two opposing support shoes (3112) are arranged facing each other.

3. The rectangular pile drilling device according to claim 2, characterized in that: The six support units (311) and the six support rods (312) form a hexagon; The shoe surfaces of the six support shoes (3112) are used to correspondingly support the four side walls of the rectangular pile hole (5); Among them, the two support shoes (3112) that are farthest apart and arranged opposite to each other correspond to the two side walls with smaller areas of the rectangular pile hole (5), and the other four support shoes (3112) are divided into two groups and correspond to the two side walls with larger areas of the rectangular pile hole (5).

4. The rectangular pile drilling device according to claim 1, characterized in that: The second telescopic member (321) comprises a driving member (3211), a sliding frame (3212) and a sliding block (3213); The driving member (3211) is arranged in a vertical direction, and its upper end is fixed to the fixed end of the first telescopic member (3111); The sliding frame (3212) is fixed to the fixed end of the first telescopic member (3111) in a vertical direction; One side of the sliding block (3213) is slidably arranged in the sliding frame (3212) along the vertical direction, and the lower end of the sliding block (3213) is connected to the lower end of the driving member (3211); The sliding block (3213) is connected to the base support (1) on one side facing the base support (1); The driving member (3211) drives the base bracket (1) to rise and fall via the sliding block (3213).

5. The rectangular pile drilling device according to claim 4, characterized in that: The second telescopic member (321) is located inside the polygonal frame; The sliding frame (3212) is a square sleeve having a vertical notch on one side facing the base bracket (1); The sliding block (3213) comprises a square column (3214) adapted to the square sleeve, and a plate (3215) connected to the square column (3214) outside the square sleeve through the vertical notch; The plate body (3215) is parallel to the side of the square sleeve facing the base bracket (1).

6. The rectangular pile drilling device according to claim 5, characterized in that: The lower part of the base support (1) is a cubic frame (11); The upper support assembly (3) is arranged above the cubic frame (11); The transmission system (2) includes a plurality of transmission components (21); A plurality of the transmission assemblies (21) are distributed around the edge of the cubic frame (11) in a vertical direction; The transmission assembly (21) comprises, from top to bottom, a motor (211), a reducer (212), a transmission shaft (213) and a drill bit (214); The drill bit (214) extends out of the lower portion of the cubic frame (11).

7. The rectangular pile drilling device according to claim 6, characterized in that: Also included is a lower support assembly (4); The lower support assembly (4) is arranged inside the cubic frame (11) away from the transmission assembly (21); The lower support assembly (4) is higher than the drill bit (214) in the vertical direction; The lower support assembly (4) can extend horizontally out of the cubic frame (11) and then be supported on the four side walls of the rectangular pile hole (5).

8. The rectangular pile drilling device according to claim 7, characterized in that: The lower support assembly (4) comprises four guide plates (41) and a plurality of third telescopic members (42); The four guide plates (41) are respectively parallel to the four side surfaces of the cubic frame (11); The third telescopic member (42) is arranged in the horizontal direction, with a fixed end arranged on the cubic frame (11), and a telescopic end connected to the guide plate (41) facing the side of the cubic frame (11); At least one of the third telescopic members (42) corresponds to one of the guide plates (41) to drive the guide plate (41) to support or leave the side wall of the corresponding rectangular pile hole (5).

9. The rectangular pile drilling device according to claim 6, characterized in that: The base support (1) further comprises a vertically arranged suspension arm (12); The suspension arm (12) is arranged through the middle of the cubic frame (11), and the upper end thereof extends out of the cubic frame (11); The plate body (3215) of the sliding block (3213) is connected to the boom (12).

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