A high-backfill rotary drilling pile construction equipment and construction method

Abstract

This invention belongs to the field of building construction technology and discloses a high-backfill rotary drilling pile construction equipment and method. It includes a base with multiple rollers installed at the bottom. A vertically placed first sliding shaft is fixed on the base, and a first sliding block is slidably engaged within the first sliding shaft. A first rotating motor is fixed at the upper end of the first sliding shaft, and a first threaded rod is provided at the output end of the first rotating motor. Rotary drilling is performed through the cooperation of the base, first sliding shaft, first sliding block, first rotating motor, first threaded rod, second sliding shaft, second sliding block, fixing ring, support, second rotating motor, second threaded rod, and drill bit. With the assistance of a limiting rod, connecting block, third sliding shaft, third sliding block, and spinning rod, during the lifting process of the drill bit and the second threaded rod through threaded meshing, the spinning rod rotates with the second threaded rod and squeezes the borehole periphery, preventing the borehole from collapsing due to loss of support during drill bit lifting.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, specifically relating to a high-backfill rotary drilling pile construction equipment and construction method. Background Technology

[0002] Rotary drilling piles are bored piles constructed using a rotary drilling rig. During construction, the rig first uses a barrel-type drill bit with a valve at the bottom to break up the soil and rock, directly loading the broken soil and rock into the drill bit. Then, the drill bit is lifted out of the pile hole to discharge the broken soil. This process is repeated until the designed depth is reached. Rotary drilling piles are widely used in highways, railways, bridges, and large-scale construction projects. However, in existing technologies, during the process of the drill bit moving upwards along the pile hole to unload soil, the surrounding walls of the pile hole lose support, which can easily lead to hole collapse. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of this invention is to provide a high-backfill rotary drilling pile construction equipment and construction method, which solves the problem that the pile hole perimeter wall is prone to collapse when the drill bit moves up along the pile hole to unload soil.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] A high-backfill rotary drilling pile construction device includes a base with multiple rollers installed at the bottom of the base. A vertically placed first sliding shaft is fixed on the base. A first sliding block is provided inside the first sliding shaft. A first rotating motor is fixed at the upper end of the first sliding shaft. A first threaded rod is provided at the output end of the first rotating motor. The first threaded rod is placed coaxially with the first sliding shaft. The first threaded rod passes through the first sliding block and is threadedly connected to the first sliding block.

[0006] A horizontally placed second slide shaft is fixed on the first slider. A rotary drilling mechanism is mounted on the second slide shaft, which includes a second slider that is slidably engaged within the second slide shaft. A fixing ring is located on the side of the second slide shaft away from the first slider. The fixing ring is coaxially positioned with the first threaded rod. A support is fixed on the second slider, with its other end fixed to the side wall of the fixing ring. A mounting bracket is fixed to the upper end of the fixing ring, and a second rotary motor, coaxially positioned with the fixing ring, is fixed to the lower end of the mounting bracket. A second threaded rod is located at the output end of the second rotary motor, and a drill bit coaxially positioned is threaded onto the second threaded rod. The second threaded rod passes through the drill bit, which is a barrel-shaped drill bit with a bottom valve. A mechanism is located inside the fixing ring that is connected to the second threaded rod. A limiting rod is placed coaxially, passes through the drill bit and is slidably connected to the drill bit. The upper end of the second threaded rod is in the shape of a smooth slide rod. A connecting block is fixed near the upper end of the limiting rod. The upper end of the second threaded rod passes through the connecting block and is rotatably connected to the connecting block. A fixing ring sleeve has multiple third sliding groove shafts that are evenly distributed in a ring about the central axis of the second threaded rod. The third sliding groove shafts are all placed horizontally and are located above the limiting rod. One end of each third sliding groove shaft is fixed to the upper peripheral wall of the second threaded rod. A third slider is provided in each third sliding groove shaft. A vertically placed spinning rod is fixedly installed at the lower end of each third slider. The spinning rod is in contact with the outer wall of the drill bit. When the drill bit is at the lowest end of the second threaded rod, the lower end of the drill bit is flush with the lower end of the spinning rod.

[0007] The fixed ring sleeve has a fixed tube placed coaxially inside. The inner diameter of the fixed tube is larger than that of the second threaded rod. Multiple fixing strips are fixed between the upper circumferential wall of the fixed tube and the inner wall of the fixed ring sleeve. A first rotating ring is provided between the third sliding shaft and the second threaded rod. The first rotating ring and the second threaded rod are placed coaxially. The end of the third sliding shaft near the second threaded rod is fixed to the outer wall of the first rotating ring. The first rotating ring is rotatably sleeved on the outer wall of the fixed tube. A rotating groove placed coaxially is opened in the fixed ring sleeve. A first toothed ring placed coaxially is rotatably engaged in the rotating groove. The end of the third sliding shaft away from the second threaded rod is fixed to the inner wall of the gear. A rotating shaft placed coaxially with the second threaded rod is rotatably connected to the support. A gear placed coaxially is fixedly sleeved at the lower end of the rotating shaft. The gear meshes with the first toothed ring. Transmission wheels are fixedly sleeved near the upper ends of the second threaded rod and the rotating shaft. An annular transmission belt is sleeved between the two transmission wheels.

[0008] A first telescopic cylinder is fixed on the lower end of the fixed pipe wall and placed vertically. A slotted plate is fixed on the telescopic rod of the first telescopic cylinder. The slotted plate has a rod groove and can be fitted onto the limiting rod. When the telescopic rod of the first telescopic cylinder is fully retracted, the slotted plate is located above the limiting rod.

[0009] The third slider is designed to slide and engage with the third slide groove shaft, and all third sliders can move along the axis of the third slide groove shaft.

[0010] The lower end of the third slide shaft is provided with a telescopic rod placed coaxially. One end of the telescopic rod is fixed to the lower end of the third slider, and the other end of the telescopic rod is fixed to the outer wall of the first rotating ring. A spring is sleeved on the telescopic rod and placed coaxially. One end of the spring is fixed to the third slider, and the other end of the spring is fixed to the outer wall of the first rotating ring. The spring is always in a compressed state.

[0011] The spinning rod is divided into three sections. The uppermost section of the spinning rod is placed coaxially with the second threaded rod and fixed to the lower end of the third slider. The middle section of the spinning rod is placed at an angle downward away from the central axis of the second threaded rod. The lowermost end of the spinning rod is placed vertically coaxially with the second threaded rod. A pressure ring is placed coaxially directly below the fixing ring sleeve. The middle section of the spinning rod is located inside the pressure ring and is in contact with the inside of the pressure ring. A pair of symmetrically placed second telescopic cylinders are fixed at the bottom of the fixing ring sleeve. The telescopic rods of the second telescopic cylinders are fixed to the pressure ring.

[0012] Multiple rotary drilling mechanisms are provided on the second chute shaft.

[0013] The second slider and the support are both detachably connected by bolts.

[0014] A third rotary motor is fixedly installed at either end of the second slide shaft. The output end of the third rotary motor has a third threaded rod, which is placed coaxially with the second slide shaft. The third threaded rod is located inside the second slide shaft and rotatably connected to it. Each second slide block is a hollow shell, and each second slide block has a through hole coaxially with the third threaded rod. The diameter of the through hole is larger than the diameter of the third threaded rod, and the third threaded rod passes through the through hole. Each second slide block has a rotatably engaging second toothed ring, which is also coaxially with the through hole. The inner diameter of the second toothed ring is larger than the diameter of the through hole. Each second toothed ring has a pair of straight racks that are centrally symmetrical about the central axis of the second toothed ring. The straight racks are vertically aligned... In the upright position, all straight racks are located inside the second slider, and all straight racks slide and engage with the inner wall of the second slider along their axial direction. Each of the second sliders has a pair of rectangular blocks placed symmetrically on top of each other. Each rectangular block has a semi-circular groove on one side close to each other. The semi-circular grooves are placed coaxially with the third threaded rod. Each semi-circular groove has a semi-circular threaded groove. When the two rectangular blocks are in contact with each other, the two semi-circular threaded grooves are spliced ​​to form a complete threaded groove. The third threaded rod is threadedly connected to the two in contact rectangular blocks. Each rectangular block is fixed with an installation block. The installation block corresponds to each straight rack, and the installation block is fixed to the corresponding straight rack. Each of the second sliders has a vertically placed third telescopic cylinder. The telescopic rod of the third telescopic cylinder is fixed to any of the installation blocks.

[0015] The second slider has a pair of symmetrically placed rectangular slide grooves, which correspond one-to-one with the rack. Each rack has a locking block fixed to it by a connector. The locking block can slide along the rectangular slide groove. The upper and lower end faces of the side wall of the second slide groove shaft along the axis of the third threaded rod are provided with tooth grooves. When the rectangular blocks are in a state of being far apart from each other, the locking block is inserted into the tooth groove and locks with the tooth groove.

[0016] The beneficial effects of this invention are:

[0017] 1. The present invention performs rotary drilling through the cooperation of a base, a first sliding shaft, a first slider, a first rotating motor, a first threaded rod, a second sliding shaft, a second slider, a fixing ring, a support, a second rotating motor, a second threaded rod, and a drill bit;

[0018] Simultaneously, with the setting of limit rod, connecting block, third slide shaft, third slider, and spinning rod, during the process of the drill bit and the second threaded rod engaging in threaded transmission and lifting, the spinning rod rotates with the second threaded rod and squeezes the borehole periphery, preventing the borehole from collapsing due to loss of support of the borehole wall during the drill bit lifting process;

[0019] 2. By cooperating with the fixed ring, fixed tube, first toothed ring, rotating shaft, gear, transmission wheel, annular transmission belt, first telescopic cylinder, and slot plate, the limit rod can be fixed and constrained in a timely manner, so that the motion relationship between the drill bit and the second threaded rod is changed to threaded gear transmission, while not affecting the rotation of the spinning rod.

[0020] 3. The rotary drilling mechanism of the present invention is provided in multiple ways, which can simultaneously perform rotary drilling of multiple pile holes, and the second slider is detachably connected to the support member, so that the number of rotary drilling mechanisms required can be selected and controlled.

[0021] 4. The present invention, through the cooperation of the second slider, the third rotary motor, the third threaded rod, the through hole, the second toothed ring, the straight rack, the rectangular block, the third telescopic cylinder, and the mounting block, can simultaneously adjust the position between multiple rotary drilling mechanisms, or selectively control the position of any one rotary drilling mechanism by moving it individually. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 These are schematic diagrams of the overall structure of the present invention from different perspectives;

[0025] Figure 3 This is a partial structural diagram of the second sliding groove shaft and the fixing ring sleeve of the present invention;

[0026] Figure 4 This is a schematic diagram of the rotary drilling mechanism of the present invention;

[0027] Figure 5 This is a schematic diagram of the gear portion of the present invention;

[0028] Figure 6 This is a partial structural diagram of the third slide shaft of the present invention;

[0029] Figure 7 This is a partial structural diagram of the second slide shaft of the present invention;

[0030] Figure 8 This is a partial structural diagram of the third threaded rod and the second slider of the present invention;

[0031] Figure 9 This is a partial structural diagram of the second toothed ring of the present invention. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figures 1 to 9 As shown, a high-backfill rotary drilling pile construction device includes a base 1, with multiple rollers installed at the bottom of the base 1, a vertically placed first sliding shaft 2 fixed on the base 1, a first sliding block 3 slidably engaged inside the first sliding shaft 2, a first rotating motor 4 fixed at the upper end of the first sliding shaft 2, a first threaded rod 41 at the output end of the first rotating motor 4, the first threaded rod 41 being placed coaxially with the first sliding shaft 2, the first threaded rod 41 passing through the first sliding block 3 and being threadedly connected to the first sliding block 3;

[0034] A horizontally placed second sliding shaft 5 is fixed on the first slider 3. A rotary drilling mechanism is provided on the second sliding shaft 5, including a second slider 6. The second slider 6 is slidably engaged within the second sliding shaft 5. A fixing ring 7 is provided on the side of the second sliding shaft 5 away from the first slider 3. The fixing ring 7 is coaxially placed with the first threaded rod 41. A support member 8 is fixed on the second slider 6, and the other end of the support member 8 is fixed to the side wall of the fixing ring 7. A mounting bracket is fixed to the upper end of the fixing ring 7. A second rotary motor 9, coaxially placed with the fixing ring 7, is fixed to the lower end face of the mounting bracket. A second threaded rod 10 is provided at the output end of the second rotary motor 9. A drill bit 11, coaxially placed, is threaded onto the second threaded rod 10. The second threaded rod 10 passes through the drill bit 11, which is a barrel-shaped drill bit with a bottom valve. A limiting device, coaxially placed with the second threaded rod 10, is provided inside the fixing ring 7. The rod 12, the limiting rod 12 passes through the drill bit 11 and is slidably connected to the drill bit 11. The upper end of the second threaded rod 10 is in the shape of a smooth slide rod. A connecting block 13 is fixed near the upper end of the limiting rod 12. The upper end of the second threaded rod 10 passes through the connecting block 13 and is rotatably connected to the connecting block 13. The fixing ring 7 is provided with a plurality of third sliding groove shafts 14 that are evenly distributed in a ring about the central axis of the second threaded rod 10. The third sliding groove shafts 14 are all horizontally placed and located at the upper end of the limiting rod 12. One end of each third sliding groove shaft 14 is fixed to the upper peripheral wall of the second threaded rod 10. Each third sliding groove shaft 14 is provided with a third slider 15. A vertically placed spinning rod 16 is fixedly installed at the lower end of each third slider 15. The spinning rod 16 is in contact with the outer wall of the drill bit 11. When the drill bit 11 is at the lower end of the second threaded rod 10, the lower end of the drill bit 11 is flush with the lower end of the spinning rod 16.

[0035] The spinning rod 16 can be made of high-hardness alloy steel or other materials to ensure that it is not easily bent while minimizing its diameter. Before rotary drilling, the drill bit 11 is positioned at the lower end of the second screw, and the first slider 3 is positioned at the upper end of the first threaded rod 41. Then, the second rotary motor 9 and the first rotary motor 4 are turned on simultaneously. The output of the second rotary motor 9 drives the second threaded rod 10 and the drill bit 11. At the same time, the rotation of the drill bit 11 drives the limiting rod 12 to rotate synchronously around the central axis of the second threaded rod 10. The output of the first rotary motor 4 drives the first threaded rod 41. The first threaded rod 41 engages with the first slider 3, causing the first slider 3 to drive the second sliding shaft 5 to move downward. The second sliding shaft 5 drives the rotary drilling mechanism to move downward, coordinating with the rotation of the drill bit 11 to perform rotary drilling into the ground. Simultaneously, the second threaded rod 10 rotates. During the process, the third sliding shaft 14 is driven, which in turn drives the third slider 15 and the spinning rod 16, causing the spinning rod 16 to rotate synchronously with the drill bit 11. When the drill bit 11 is filled with soil, it is necessary to lift the drill bit 11 to remove the soil inside. At the same time, the first rotating motor 4 is turned off, and the upper end of the limit rod 12 is fixed. At this time, during the rotation of the second threaded rod 10, the drill bit 11 cannot rotate synchronously with the second threaded rod 10 after the limit rod 12 is fixed. Through the constraint of the limit rod 12, the drill bit 11 rotates with the second threaded rod 10 to perform threaded gear transmission, so that the drill bit 11 moves upward along the axis of the second threaded rod 10 and is lifted out of the borehole. At the same time, during the lifting of the drill bit 11, the spinning rod 16 rotates with the second threaded rod 10 to squeeze the borehole wall, so as to prevent the borehole wall from losing support and collapsing during the lifting of the drill bit 11.

[0036] After the drill bit 11 is lifted out of the borehole to expel the soil inside, the constraint limiting rod 12 is fixed again, and the drill bit 11 is moved back to the lower end of the second threaded rod 10 by changing the rotation direction of the second threaded rod 10. Then the constraint on the limiting rod 12 is released, and the drill bit 11 continues to rotate. The first rotating motor 4 is turned on again, and the drill hole is drilled downwards again. The above process is repeated continuously to complete the drilling work.

[0037] To facilitate timely fixing and constraint control of the limiting rod 12, and to ensure that the rotation of the spinning rod 16 is not affected while the limiting rod 12 is fixed, a fixing tube 17 is provided coaxially inside the fixing ring sleeve 7. The inner diameter of the fixing tube 17 is larger than that of the second threaded rod 10. Multiple fixing strips are fixed between the upper peripheral wall of the fixing tube 17 and the inner wall of the fixing ring sleeve 7. A first rotating ring is provided between the third sliding groove shaft 14 and the second threaded rod 10. The first rotating ring and the second threaded rod 10 are coaxially positioned. The ends of the third sliding groove shaft 14 near the second threaded rod 10 are fixed to the outer wall of the first rotating ring. The rotating sleeve is mounted on the outer wall of the fixed tube 17. The fixed ring sleeve 7 has a rotating groove placed on the same axis. The first toothed ring 18 placed on the same axis is rotatably engaged in the rotating groove. The ends of the third sliding groove shaft 14 away from the second threaded rod 10 are fixed to the inner wall of the gear 19. The support member 8 is rotatably connected to a rotating shaft placed on the same axis as the second threaded rod 10. The lower end of the rotating shaft is fixedly fitted with a gear 19 placed on the same axis. The gear 19 is meshed with the first toothed ring 18. The second threaded rod 10 and the rotating shaft are both fixedly fitted with transmission wheels 20 near the upper end. An annular transmission belt 21 is fitted between the two transmission wheels 20.

[0038] A first telescopic cylinder 22 is fixed on the lower end of the fixed pipe 17 and placed vertically. A slotted plate 23 is fixed on the telescopic rod of the first telescopic cylinder 22. A rod groove is opened on the slotted plate 23. The slotted plate 23 can be fitted onto the limiting rod 12. When the telescopic rod of the first telescopic cylinder 22 is fully retracted, the slotted plate 23 is located above the limiting rod 12.

[0039] The second rotary motor 9 is turned on, and its output drives the second threaded rod 10. The second threaded rod 10 sequentially drives the transmission wheel 20, the annular transmission belt 21, another transmission wheel 20, the shaft, the gear 19, the first gear ring 18, the third sliding groove shaft 14, the third slider 15, and the spinning rod 16, causing the spinning rod 16 to rotate along the borehole perimeter. When it is necessary to fix the limiting rod 12, the first telescopic cylinder 22 is activated. The telescopic rod of the first telescopic cylinder 22 drives the slot plate 23 to move downward, and at the same time, it rotates the second threaded rod 10 to drive the drill bit 11 and the limiting rod. 12. When the limiting rod 12 is directly below the groove on the slot plate 23, the extension of the first telescopic cylinder 22 causes the slot plate 23 to be fitted onto the limiting rod 12. Through the cooperation of the fixing tube 17, the first telescopic cylinder 22, and the slot plate 23, the limiting rod 12 is limited and fixed. After the slot plate 23 is fitted onto the limiting rod 12, the rotation of the second threaded rod 10 will engage with the drill bit 11, which facilitates timely fixing and constraint control of the limiting rod 12. At the same time, the rotation of the spinning rod 16 is not affected while the limiting rod 12 is constrained and fixed.

[0040] To facilitate the use of the spinning rod 16 with various diameter drill bits 11, the third slider 15 is designed to slide and engage with the third groove shaft 14. The third slider 15 can move along the axis of the third groove shaft 14. By adjusting the distance between the third slider 15 and the axis of the second threaded rod 10, the third slider 15 drives the spinning rod 16. When changing drill bits 11 of different diameters, the spinning rod 16 can be controlled and adjusted to fit against the outer wall of the drill bit 11.

[0041] In order to automatically control and adjust the distance between the central axis of the spinning rod 16 and the second threaded rod 10, and at the same time to provide pressure to the spinning rod 16 to squeeze and support the borehole peripheral wall, the lower end of the third slide shaft 14 is provided with a telescopic rod placed in the same axis. One end of the telescopic rod is fixed to the lower end of the third slider 15, and the other end of the telescopic rod is fixed to the outer wall of the first rotating ring. A spring 24 placed in the same axis is sleeved on the telescopic rod. One end of the spring 24 is fixed to the third slider 15, and the other end of the spring 24 is fixed to the outer wall of the first rotating ring. The spring 24 is always in a compressed state.

[0042] The spinning rod 16 is divided into three sections. The uppermost section of the spinning rod 16 is placed coaxially with the second threaded rod 10 and fixed to the lower end of the third slider 15. The middle section of the spinning rod 16 is placed at an angle downward away from the central axis of the second threaded rod 10. The lowermost end of the spinning rod 16 is placed vertically coaxially with the second threaded rod 10. A pressure ring 25 is placed coaxially directly below the fixing ring sleeve 7. The middle section of the spinning rod 16 is located inside the pressure ring 25 and is pressed into contact with the inside of the pressure ring 25. A pair of symmetrically placed second telescopic cylinders 26 are fixed at the bottom of the fixing ring sleeve 7. The telescopic rods of the second telescopic cylinders 26 are fixed to the pressure ring 25.

[0043] When the second telescopic cylinder 26 is activated, the extension and retraction of the telescopic rod of the second telescopic cylinder 26 is controlled to adjust the pressure ring 25. When replacing the small-diameter drill bit 11, it is necessary to reduce the distance between the spinning rod 16 and the central axis of the second threaded rod 10. At this time, when the extension and retraction of the telescopic rod of the second telescopic cylinder 26 causes the pressure ring 25 to move downward, the pressure ring 25 moves downward and continuously squeezes and contacts the peripheral wall of the spinning rod 16, causing the spinning rod 16 to move closer to the central axis of the second threaded rod 10, thereby reducing the distance between the spinning rod 16 and the central axis of the second threaded rod 10. When replacing the large-diameter drill bit 11, the extension and retraction of the telescopic rod of the second telescopic cylinder 26 retracts, causing the pressure ring 25 to move upward. At the same time, the spring 24 pushes the third slider 15 and the spinning rod 16, causing the spinning rod 16 to move away from the central axis of the second threaded rod 10, thereby increasing the distance between the spinning rod 16 and the central axis of the second threaded rod 10.

[0044] At the same time, when the drill bit 11 needs to move upward, the second telescopic cylinder 26 can be opened first to retract the telescopic rod and drive the pressure ring 25 to move upward. Under the elastic force of the spring 24, the spinning rod 16 is pushed to continuously squeeze against the borehole wall.

[0045] To facilitate the simultaneous drilling of multiple rotary piles, multiple rotary drilling mechanisms are provided on the second slide shaft 5. The use of multiple rotary drilling mechanisms enables the simultaneous drilling of multiple rotary piles, which can improve the efficiency of rotary pile construction. Furthermore, the distance between each rotary pile can be controlled and adjusted by adjusting the position of the second sliders 6.

[0046] When the number of rotary drilling piles required is small, in order to avoid collision between the excess rotary drilling mechanism and the ground, the second slider 6 and the support member 8 are connected by bolts in a detachable manner; when only a few rotary drilling piles need to be constructed, the second slider 6 and the support member 8 on the excess rotary drilling mechanism can be disassembled by bolts.

[0047] To facilitate automatic control and adjustment of the positions of each rotary drilling mechanism, a third rotary motor 27 is fixedly installed at either end of the second chute shaft 5. The output end of the third rotary motor 27 is provided with a third threaded rod 28, which is placed coaxially with the second chute shaft 5. The third threaded rod 28 is located inside the second chute shaft 5 and rotatably connected to it. Each second slide block 6 is designed as a hollow shell, and each slide block 6 has a through hole 61 coaxially with the third threaded rod 28. The diameter of the through hole 61 is larger than the diameter of the third threaded rod 28, and the third threaded rod 28 passes through the through hole 61. Each second slide block 6 has a rotatably engaging second toothed ring 29, which is coaxially with the through hole 61. The inner diameter of the second toothed ring 29 is larger than the diameter of the through hole 61. Each second toothed ring 29 has a pair of teeth meshed with it about the central axis of the second toothed ring 29. Symmetrically placed racks 30, all vertically positioned, are located within the second slider 6 and slide along their axial direction against the inner wall of the second slider 6. Each second slider 6 contains a pair of symmetrically placed rectangular blocks 31. Semicircular grooves are formed on one side of each rectangular block 31, and these grooves are coaxially aligned with the third threaded rod 28. Semicircular threaded grooves are formed within these grooves. When the two rectangular blocks 31 are in contact, the two semicircular threaded grooves join to form a complete threaded groove. The third threaded rod 28 is threadedly engaged with the two in contact rectangular blocks 31. Mounting blocks are fixed to each rectangular block 31, corresponding one-to-one with each rack 30. Each mounting block is fixed to its corresponding rack 30. A vertically placed third telescopic cylinder 32 is fixed within each second slider 6, and the telescopic rod of the third telescopic cylinder 32 is fixed to any mounting block.

[0048] The third telescopic cylinder 32 is activated, causing its telescopic rod to extend and retract, driving the mounting block, rack 30, second gear ring 29, and another rack 30, so that the two racks 30 drive the rectangular block 31 to move away from or closer to each other. When it is necessary to adjust the position of any rotary drilling mechanism, the third telescopic cylinder 32 in that rotary drilling mechanism is activated, causing its telescopic rod to extend and retract, so that the two rectangular blocks 31 are brought into contact with each other. Then, the third rotary motor 27 is activated, and the output end of the third rotary motor 27 drives the third threaded rod 28. The 8 and the two rectangular blocks 31 after assembly are threadedly engaged, and the rectangular blocks 31 drive the mounting block, the third telescopic cylinder 32 and the second slider 6, thereby realizing the adjustment of the position of the rotary drilling mechanism; and when adjusting the position of any rotary drilling mechanism at the same time, if it is not necessary to change the position of other rotary drilling mechanisms, the third telescopic cylinder 32 in the rotary drilling mechanism whose position does not need to be changed is opened. The telescopic rod of the third telescopic cylinder 32 extends and retracts, so that the rectangular blocks 31 in the rotary drilling mechanism move away from each other, and the rotation of the third threaded rod 28 does not affect the rotary drilling mechanism.

[0049] To prevent the rotary drilling mechanism with rectangular blocks 31 moving away from each other from sliding along the second slide shaft 5, a pair of symmetrically placed rectangular slide grooves 62 are provided in each of the second slide blocks 6. The rectangular slide grooves 62 correspond one-to-one with the racks 30. Each rack 30 is fixed with a locking block 33 by a connector. The locking block 33 can slide along the rectangular slide groove 62. The upper and lower end faces of the side wall of the second slide shaft 5 along the axis of the third threaded rod 28 are provided with toothed grooves 51. When the rectangular blocks 31 are in a state of moving away from each other, the locking block 33 is inserted into the toothed groove 51 and locks with the toothed groove 51. The rectangular blocks 31 inside the rotary drilling mechanism that do not require adjustment are moving away from each other, and the locking block 33 locks with the toothed groove 51, thus preventing the rotary drilling mechanism from sliding.

[0050] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A high backfill rotary excavated pile construction apparatus comprising a base (1), characterized in that, The base (1) has multiple rollers installed at the bottom. A vertically placed first sliding shaft (2) is fixed on the base (1). A sliding block (3) is provided inside the first sliding shaft (2). A first rotating motor (4) is fixed at the upper end of the first sliding shaft (2). A first threaded rod (41) is provided at the output end of the first rotating motor (4). The first threaded rod (41) is placed on the same axis as the first sliding shaft (2). The first threaded rod (41) passes through the first slider (3) and is threadedly connected to the first slider (3). A horizontally placed second slide shaft (5) is fixed on the first slider (3). A rotary drilling mechanism is provided on the second slide shaft (5). The rotary drilling mechanism includes a second slider (6). The second slider (6) is slidably engaged in the second slide shaft (5). A fixing ring (7) is provided on the side of the second slide shaft (5) away from the first slider (3). The fixing ring (7) is placed coaxially with the first threaded rod (41). A support member (8) is fixed on the second slider (6). The other end of the support member (8) is fixed to the side wall of the fixing ring (7). A mounting bracket is fixed to the upper end of the ring (7), and a second rotating motor (9) is fixed to the lower end of the mounting bracket, which is placed coaxially with the fixed ring (7). The output end of the second rotating motor (9) is provided with a second threaded rod (10), and a drill bit (11) placed coaxially is threaded onto the second threaded rod (10). The second threaded rod (10) passes through the drill bit (11), which is a barrel-shaped drill bit (11) with a valve at the bottom. A limiting device is provided inside the fixed ring (7) that is placed coaxially with the second threaded rod (10). The rod (12) and the limiting rod (12) pass through the drill bit (11) and are slidably connected to the drill bit (11). The upper end of the second threaded rod (10) is in the shape of a smooth sliding rod. A connecting block (13) is fixed near the upper end of the limiting rod (12). The upper end of the second threaded rod (10) passes through the connecting block (13) and is rotatably connected to the connecting block (13). The fixing ring (7) is provided with multiple third sliding groove shafts (14) that are evenly distributed in a ring about the central axis of the second threaded rod (10). The third sliding groove shafts (14) are all placed horizontally. The state is such that the third sliding shaft (14) is located at the upper end of the limiting rod (12), one end of the third sliding shaft (14) is fixed to the upper peripheral wall of the second threaded rod (10), the third sliding shaft (14) is provided with a third slider (15), the lower end of the third slider (15) is fixedly installed with a vertically placed spinning rod (16), the spinning rod (16) is in contact with the outer wall of the drill bit (11), and when the drill bit (11) is at the lowest end of the second threaded rod (10), the lower end of the drill bit (11) is flush with the lower end of the spinning rod (16); The spinning rod (16) is divided into three sections. The uppermost section of the spinning rod (16) is placed coaxially with the second threaded rod (10) and fixed to the lower end of the third slider (15). The middle section of the spinning rod (16) is placed at an angle downward away from the central axis of the second threaded rod (10). The lowermost end of the spinning rod (16) is placed vertically coaxially with the second threaded rod (10). A pressure ring (25) is placed coaxially directly below the fixing ring sleeve (7). The middle sections of the spinning rod (16) are all located inside the pressure ring (25) and are pressed into contact with the inside of the pressure ring (25). A pair of symmetrically placed second telescopic cylinders (26) are fixed at the bottom of the fixing ring sleeve (7). The telescopic rods of the second telescopic cylinders (26) are all fixed to the pressure ring (25).

2. The high-backfill rotary drilling pile construction equipment according to claim 1, characterized in that, The fixing ring (7) is provided with a fixing tube (17) placed coaxially. The inner diameter of the fixing tube (17) is larger than that of the second threaded rod (10). Multiple fixing strips are fixed between the upper peripheral wall of the fixing tube (17) and the inner wall of the fixing ring (7). A first rotating ring is provided between the third sliding shaft (14) and the second threaded rod (10). The first rotating ring and the second threaded rod (10) are placed coaxially. The end of the third sliding shaft (14) near the second threaded rod (10) is fixed to the outer wall of the first rotating ring. The first rotating ring is rotatably sleeved on the outer wall of the fixing tube (17). The fixing ring (7) has a set of... A rotating groove is placed on the axis, and a first toothed ring (18) is rotatably engaged in the rotating groove. The end of the third sliding groove shaft (14) away from the second threaded rod (10) is fixed to the inner wall of the gear (19). A rotating shaft is rotatably connected to the support member (8) and is placed in the same direction as the second threaded rod (10). A gear (19) is fixedly sleeved on the lower end of the rotating shaft and is placed in the same direction. The gear (19) is meshed with the first toothed ring (18). A transmission wheel (20) is fixedly sleeved on the second threaded rod (10) and the rotating shaft near the upper end. An annular transmission belt (21) is sleeved between the two transmission wheels (20). A first telescopic cylinder (22) is fixed on the lower end of the fixed pipe (17) and placed vertically. A slotted plate (23) is fixed on the telescopic rod of the first telescopic cylinder (22). A rod groove is opened on the slotted plate (23). The slotted plate (23) can be fitted onto the limiting rod (12). When the telescopic rod of the first telescopic cylinder (22) is fully retracted, the slotted plate (23) is located above the limiting rod (12).

3. The high-backfill rotary drilling pile construction equipment according to claim 1, characterized in that, The third slider (15) is designed to be slidably engaged with the third slide shaft (14), and the third slider (15) can move along the axis of the third slide shaft (14).

4. The high-backfill rotary drilling pile construction equipment according to claim 3, characterized in that, The lower end of the third slide shaft (14) is provided with a telescopic rod placed in the same direction. One end of the telescopic rod is fixed to the lower end of the third slider (15), and the other end of the telescopic rod is fixed to the outer wall of the first rotating ring. A spring (24) is placed in the same direction on the telescopic rod. One end of the spring (24) is fixed to the third slider (15), and the other end of the spring (24) is fixed to the outer wall of the first rotating ring. The spring (24) is always in a compressed state.

5. The high-backfill rotary drilling pile construction equipment according to claim 4, characterized in that, Multiple rotary drilling mechanisms are provided on the second chute shaft (5).

6. The high-backfill rotary drilling pile construction equipment according to claim 5, characterized in that, The second slider (6) and the support (8) are both connected by bolts to be detachable.

7. The high-backfill rotary drilling pile construction equipment according to claim 5, characterized in that, A third rotary motor (27) is fixedly installed at either end of the second slide shaft (5). The output end of the third rotary motor (27) is provided with a third threaded rod (28). The third threaded rod (28) is placed coaxially with the second slide shaft (5). The third threaded rod (28) is located inside the second slide shaft (5) and is rotatably connected to the second slide shaft (5). The second sliders (6) are all hollow shells. Each of the second sliders (6) has a through hole (61) placed coaxially with the third threaded rod (28). The diameter of the through hole (61) is larger than the diameter of the third threaded rod (28). The third threaded rod (28) passes through the through hole (61). Each of the second sliders (6) has a rotatingly engaging second toothed ring (29). The second toothed ring (29) is placed coaxially with the through hole (61). The inner diameter of the second toothed ring (29) is larger than the diameter of the through hole (61). Each of the second toothed rings (29) has a pair of teeth that are symmetrically placed about the central axis of the second toothed ring (29). The racks (30) are all placed vertically and are located inside the second slider (6). The racks (30) are all slidably engaged with the inner wall of the second slider (6) along their axial direction. The second slider (6) is provided with a pair of rectangular blocks (31) placed symmetrically on the top and bottom. The rectangular blocks (31) are provided with semi-circular grooves on one side of each other. The semi-circular grooves are placed coaxially with the third threaded rod (28). The semi-circular grooves are provided with semi-circular threaded grooves. When the two rectangular blocks (31) are in contact with each other, the two semi-circular threaded grooves are spliced ​​together to form a complete threaded groove. The third threaded rod (28) is threadedly connected to the two rectangular blocks (31) in contact. Each rectangular block (31) is fixed with an installation block. The installation block corresponds to the straight rack (30) one by one, and the installation block is fixed to the corresponding straight rack (30). Each of the second sliders (6) is fixed with a vertically placed third telescopic cylinder (32). The telescopic rod of the third telescopic cylinder (32) is fixed to any installation block.

8. The high-backfill rotary drilling pile construction equipment according to claim 7, characterized in that, The second slider (6) has a pair of symmetrically placed rectangular slide grooves (62) inside. The rectangular slide grooves (62) correspond one-to-one with the rack (30). The rack (30) is fixed with a locking block (33) by a connector. The locking block (33) can slide along the rectangular slide groove (62). The second slide groove shaft (5) has a toothed groove (51) on the upper and lower end faces of the side wall along the axis of the third threaded rod (28). When the rectangular blocks (31) are in a state of being far apart from each other, the locking block (33) is inserted into the toothed groove (51) and locked with the toothed groove (51).

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