A rotary digging hard cutting construction equipment for construction of a bite pile

Abstract

The application belongs to the technical field of construction equipment for bite pile, and particularly relates to a rotary digging hard cutting construction equipment for bite pile construction, which comprises a drill bit, a mounting table and a connecting rod, and further comprises: a first roller set and a second roller set, both of which are arranged on the drill bit; a first control part and a second control part, both of which are arranged on the mounting table; a driving mechanism arranged below the mounting table and used for providing power; an auxiliary mechanism comprising a limiting part arranged on the drill bit, a driving part and a water delivery channel arranged on the driving part; and a vibration mechanism arranged on the top of the drill bit. The application can realize online switching and intelligent cooling of the roller set without pulling out the drill, greatly reduces the number of pulling out the drill, and significantly improves the construction efficiency, safety and equipment adaptability.

Description

Technical Field

[0001] This invention belongs to the technical field of interlocking pile construction equipment, specifically relating to a rotary drilling hard cutting construction equipment for interlocking pile construction. Background Technology

[0002] Interlocking piles, as a highly efficient, continuous, and seepage-proof retaining structure for foundation pits, have been widely used in various deep foundation pit projects, especially in strata rich in groundwater or soft soil. Construction typically employs rotary drilling rigs to create holes, with adjacent pile holes partially overlapping (i.e., "interlocking") to form a continuous wall. During drilling, when encountering hard rock, pebble layers, or high-strength strata, roller cone drills are often used to improve rock-breaking efficiency.

[0003] First, conventional rotary drilling bits are typically equipped with only a single set of cones. When continuously drilling into hard rock or high-strength formations, the cones generate a large amount of heat due to prolonged and intense friction, causing a sharp rise in the surface temperature of the cones. This overheating accelerates the fatigue and wear of the cone material, and may even cause the surface hardened layer to peel off or the metallographic structure to change, thus significantly shortening the service life of the cones and increasing construction costs.

[0004] Secondly, when the working drill bit assembly is severely worn or damaged, the entire drill rod must be completely pulled out of the pile hole for replacement or repair on the ground. This "drill pulling" operation is not only time-consuming and labor-intensive, severely slowing down the construction progress, but also extremely harmful in unstable strata such as soft soil and sand layers. Frequent drill pulling will repeatedly disturb the soil around the borehole wall, destroying the mud cake's protective effect and easily inducing borehole wall collapse and diameter reduction.

[0005] Furthermore, existing drill bits suffer from inefficient cooling and slag removal. If the high-temperature rock dust generated during rock cutting is not cooled and moistened in time, it will exacerbate dry friction with the drill bit, further increasing the temperature and reducing rock-breaking efficiency. Summary of the Invention

[0006] The purpose of this invention is to provide a rotary drilling hard cutting construction equipment for interlocking pile construction, which can realize online switching of the roller cone group without lifting the drill and intelligent cooling, greatly reducing the number of times the drill is lifted, and significantly improving construction efficiency, safety and equipment adaptability.

[0007] The specific technical solution adopted by this invention is as follows: A rotary drilling hard-cutting construction device for interlocking pile construction includes a drill bit, a mounting platform, and multiple connecting rods connecting the drill bit and the mounting platform, and further includes: The first and second roller cone sets are both mounted on the drill bit. The first control unit and the second control unit are both mounted on the mounting platform and independently control the vertical height of the first gear set and the second gear set to adjust the working state of the two gear sets. A drive mechanism, located below the mounting platform, is used to provide power; An auxiliary mechanism includes a limiting part disposed on the drill bit, a driving part for driving the limiting part to move, and a water supply channel disposed on the driving part. The limiting part is used to lock the gear set in the working state. A vibration mechanism, located at the top of the drill bit, is used to provide vibration to facilitate material discharge.

[0008] In a preferred embodiment, both the first and second roller cone sets include hexagonal prisms. Multiple hexagonal prisms are slidably inserted into the drill bit in a ring-shaped arrangement. The lower end of each hexagonal prism is fixedly connected to a mounting base. Roller cones are fixedly mounted on the mounting base. Limiting holes are provided on both sides of the mounting base. A push rod is fixedly connected to the limiting hole. A water outlet is fixedly connected to the mounting base. A water delivery groove is also provided on the mounting base. The limiting hole and the water outlet are connected through the water delivery groove.

[0009] In a preferred embodiment, the first control unit includes a first electric push rod, which is fixedly mounted on a mounting platform. The lower end of the first electric push rod is fixedly connected to a first lifting plate, and the first lifting plate is fixedly connected to a hexagonal prism on the first gear set.

[0010] In a preferred embodiment, the second control unit includes a second electric push rod, which is fixedly mounted on a mounting platform. The lower end of the second electric push rod is fixedly connected to a second lifting plate, and the second lifting plate is fixedly connected to a hexagonal prism on the second gear set.

[0011] In a preferred embodiment, the drive mechanism includes a motor, which is fixedly mounted on a mounting platform. A drive rod is fixedly connected to the lower end of the motor's output shaft, and a hexagonal groove is provided at the lower end of the drive rod, through which a hexagonal rod is slidably inserted. A chuck is fixedly connected to the lower end of the hexagonal rod, and a disc is fixedly fitted onto the lower outer wall of the chuck. A protrusion is fixedly connected to the bottom surface of the disc. A third electric push rod is fixedly mounted on the top surface of the drill bit, and the telescopic end of the third electric push rod is rotatably connected to the disc via a bearing.

[0012] In a preferred embodiment, the limiting part includes a movable groove, and a plurality of movable grooves are arranged in a ring at the lower end of the drill bit. Movable grooves are provided on both sides of the movable grooves. A limiting block is slidably connected within the movable groove. A first compression spring is fixedly connected between the limiting block and the movable groove. A sealing block is slidably connected within the limiting block. A through hole is provided on the sealing block. A second compression spring is fixedly connected between the sealing block and the limiting block. A water outlet and a through groove are provided at one end of the limiting block. A force-bearing rod is also fixedly connected to the inner wall of the limiting block using a bracket.

[0013] In a preferred embodiment, the drive unit includes hollow rods, a plurality of hollow rods being rotatably connected to the drill bit in a ring-shaped arrangement, and the lower end of the hollow rods being rotatably connected to the inner wall of the movable groove via bearings. A gear is fixedly sleeved on the upper end of the hollow rods, and a gear ring is rotatably connected to the upper end of the drill bit. A chuck is fixedly connected to the inner ring of the gear ring via a support rod, and a groove for matching the chuck head is provided at the center of the chuck. A drainage hole is provided at the lower end of the hollow rods, and a nut block is sleeved on the lower end of the hollow rods. A guide rod is fixedly connected inside the movable groove, and an abutment block is slidably connected to the guide rod, and the abutment block is fixedly connected to the nut block.

[0014] In a preferred embodiment, one end of the hollow rod located in the movable groove is provided with a thread that matches the nut block, and the hollow rod is threadedly connected to the nut block.

[0015] In a preferred embodiment, the water supply channel includes a water storage tank, which is located on the mounting platform. A water inlet pipe is rotatably connected to the water storage tank via a sealed bearing, and the upper end of the hollow rod is rotatably connected to the mounting platform via a bearing and is connected to the water storage tank.

[0016] In a preferred embodiment, the vibration mechanism includes a lifting groove, a plurality of lifting grooves being arranged in a ring at the upper end of the drill bit, a lifting rod being slidably connected in the lifting groove, a fixing ring being fixedly sleeved on the outer wall of the lifting rod, a third compression spring being fixedly connected between the fixing ring and the lifting groove, a striking rod being connected in a ring on the fixing ring, and an impact head being fixedly connected to the lower end of the lifting rod.

[0017] The technical effects achieved by this invention are as follows: This invention features two independently controllable sets of first and second gear cones, each with its own independent height adjustment via a first and second control unit. This design allows the operator to dynamically switch between working gear cone sets during drilling. When one set of cones overheats due to continuous operation, it can be raised to a non-working state, while the other set is lowered to take over. This alternating working mode provides valuable intermittent cooling time for the cones, solving the problems of overheating, accelerated material wear, and shortened lifespan caused by prolonged continuous friction. Furthermore, when one set of cones becomes severely worn or damaged, there is no need to immediately remove the drill bit for replacement; drilling can be directly switched to the spare set within the hole, avoiding prolonged construction interruptions due to cone replacement and significantly improving pure drilling time and overall construction efficiency. This invention incorporates an auxiliary mechanism and a vibration mechanism. The auxiliary mechanism not only achieves mechanical locking of the working gear assembly through a limiting part and a driving part, improving stability, but its water supply channel is also linked to the limiting part for control. The cooling water circuit is automatically opened by the push rod only when the limiting block is inserted into the limiting hole of the working gear assembly mounting seat. This design achieves directional supply of cooling water, efficiently cooling the gears and wetting rock powder to reduce friction while eliminating water waste. Furthermore, the vibration mechanism utilizes the same driving mechanism to periodically strike the lifting rod with protrusions on the bottom of the drive disc, generating vibration. Combined with the tamping action of the impact head, this effectively removes accumulated slag from the drill bit, greatly improving the efficiency of equipment maintenance and preparation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a bottom view of the overall structure of the invention; Figure 3 This is a schematic diagram showing the connection between the first gear set and the first control unit of the present invention; Figure 4 This is a cross-sectional view of the mounting base of the present invention; Figure 5 This is the present invention. Figure 4 The right-side view; Figure 6 This is a partial sectional view of the drill bit and mounting platform of the present invention; Figure 7 This is a schematic diagram of the drive mechanism of the present invention; Figure 8 This is the present invention. Figure 7 Top view; Figure 9 This is a schematic diagram of the structure of the overall protective shell of the present invention after disassembly; Figure 10 This is the present invention. Figure 6 An enlarged schematic diagram of part A shown in the image; Figure 11 This is a schematic diagram showing the connection between the limiting part and the mounting base of the present invention; Figure 12 This is the present invention. Figure 11 An enlarged schematic diagram of part B shown in the image; Figure 13 This is a top sectional view of the limiting part of the present invention; Figure 14 This is a schematic diagram of the invention applied to a rotary drilling rig.

[0019] The attached diagram lists the components represented by each number as follows: 1. Drill bit; 2. Mounting platform; 3. Connecting rod; 41. First gear train; 42. Second gear train; 51. First control unit; 52. Second control unit; 6. Drive mechanism; 7. Auxiliary mechanism; 71. Limiting part; 72. Drive unit; 73. Water supply channel; 8. Vibration mechanism; 401. Hexagonal prism; 402. Mounting base; 403. Roller wheel; 404. Limiting hole; 405. Push rod; 406. Water outlet; 407. Water delivery trough; 511. First lifting plate; 512. First electric push rod; 521. Second lifting plate; 522. Second electric push rod; 61. Motor; 62. Drive rod; 63. Hexagonal rod; 64. Collar; 65. Disc; 66. Protrusion; 67. Third electric actuator; 711. Movable groove; 712. Moving groove; 713. Limiting block; 714. First compression spring; 715. Sealing block; 716. Through hole; 717. Second compression spring; 718. Water outlet; 719. Through groove; 7110. Force rod; 721. Hollow rod; 722. Gear; 723. Gear ring; 724. Chuck; 725. Drain hole; 726. Nut block; 727. Guide rod; 728. Abutment block; 731. Water storage tank; 732. Water inlet pipe; 81. Lifting groove; 82. Lifting rod; 83. Fixing ring; 84. Third compression spring; 85. Striking rod; 86. Impact head. Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0023] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0024] Please see the appendix Figures 1 to 11 As shown, this embodiment provides a rotary drilling hard-cutting construction device for interlocking pile construction, including a drill bit 1, a mounting platform 2, and multiple connecting rods 3 connecting the drill bit 1 and the mounting platform 2. A protective shell is also provided between the drill bit 1 and the mounting platform 2, and the device further includes: The first gear set 41 and the second gear set 42 are both mounted on the drill bit 1; The first control unit 51 and the second control unit 52 are both mounted on the mounting platform 2 and independently control the vertical height of the first gear set 41 and the second gear set 42 to adjust the working state of the two gear sets. Drive mechanism 6, which is located below mounting platform 2, is used to provide power; The auxiliary mechanism 7 includes a limiting part 71 disposed on the drill bit 1, a driving part 72 for driving the limiting part 71 to move, and a water supply channel 73 disposed on the driving part 72. The limiting part 71 is used to lock the gear set in the working state. Vibration mechanism 8 is located on top of drill bit 1 and is used to provide vibration to facilitate material discharge.

[0025] In this embodiment, before construction, the entire device needs to be installed on the power head of the rotary drilling rig (the installation method is common knowledge in the prior art and will not be described in detail here; please refer to the appendix). Figure 14Specifically, the mounting platform 2 on top of the equipment is reliably connected to the output shaft of the rotary drilling rig. After the rotary drilling rig is started, the power is transmitted through the mounting platform 2 to multiple connecting rods 3 fixed to it, ultimately driving the entire drill bit 1 to rotate around its central axis, thereby cutting and drilling the strata to form a pile hole. By controlling the first control unit 51 and the second control unit 52, the first roller cone set 41 or the second roller cone set 42 is adjusted to extend out of the lower end face of the drill bit 1, so that it is in the working position (i.e., the cutting position), while the other set is retracted to the non-working (standby) position.

[0026] Secondly, please refer to it again. Figures 3 to 6 Both the first gear set 41 and the second gear set 42 include hexagonal prisms 401. Multiple hexagonal prisms 401 are arranged in a ring and slidably inserted into the drill bit 1. The lower end of the hexagonal prism 401 is fixedly connected to a mounting base 402. Gear 403 is fixedly mounted on the mounting base 402. Limiting holes 404 are opened on both sides of the mounting base 402. A push rod 405 is fixedly connected in the limiting hole 404. A water outlet 406 is fixedly connected on the mounting base 402. A water delivery groove 407 is also opened on the mounting base 402. The limiting hole 404 and the water outlet 406 are connected through the water delivery groove 407. The gear 403 is detachably mounted on the mounting base 402 by bolts, which facilitates subsequent replacement.

[0027] Secondly, please refer to the following as well. Figure 3 , Figure 6 and Figure 9 The first control unit 51 includes a first electric push rod 512, which is fixedly mounted on the mounting platform 2. The lower end of the first electric push rod 512 is fixedly connected to a first lifting plate 511, and the first lifting plate 511 is fixedly connected to a hexagonal prism 401 on the first gear set 41. The second control unit 52 includes a second electric push rod 522, which is fixedly mounted on the mounting platform 2. The lower end of the second electric push rod 522 is fixedly connected to a second lifting plate 521, and the second lifting plate 521 is fixedly connected to a hexagonal prism 401 on the second gear set 42.

[0028] In this embodiment, the first electric push rod 512 of the first control unit 51 is fixed to the mounting platform 2. When it extends or retracts, it directly drives the first lifting plate 511, which is fixed to it, to move vertically up and down. The first lifting plate 511 is fixedly connected to the upper ends of all the hexagonal prisms 401 of the first gear set 41. Therefore, the lifting and lowering movement of the first lifting plate 511 will synchronously drive all the hexagonal prisms 401 to slide in the corresponding grooves of the drill bit 1, thereby adjusting the ground clearance of the mounting base 402 and the gear 403 fixed to the lower end of the hexagonal prisms 401. Similarly, the second electric push rod 522 of the second control unit 52 drives the second lifting plate 521, thereby controlling the lifting and lowering of all the hexagonal prisms 401 and gear 403 of the second gear set 42.

[0029] Through the aforementioned independent control, the operator can dynamically switch the working gear set during drilling. Specifically: when the temperature of the upper gear 403 of the first gear set 41 rises due to continuous operation, it can be raised to a non-working state; simultaneously, the second gear set 42 is lowered to take over the drilling operation. This alternating use method allows each gear set to obtain intermittent cooling time, effectively preventing changes in the metallographic structure of the gear material, decrease in hardness, and accelerated wear caused by prolonged continuous friction and heat generation.

[0030] Furthermore, during drilling, if some cones 403 of the first cone set 41 experience severe tooth breakage or wear, it is not necessary to immediately stop drilling and spend a significant amount of time removing the entire drill rod from the hole (i.e., "drill lifting") for replacement. The operator can directly manipulate the system inside the hole, raising the damaged first cone set 41 and lowering the intact second cone set 42 to continue drilling. This significantly reduces the number of times the drill rig needs to be lifted. During interlocking pile construction, frequent drill lifting can easily disrupt the stability of the borehole wall. This equipment significantly reduces construction risks by minimizing drill lifting, ensuring the quality of pile formation and the safety of the foundation pit.

[0031] Secondly, please refer to it again. Figures 6 to 8 The drive mechanism 6 includes a motor 61, which is fixedly mounted on the mounting platform 2. The lower end of the output shaft of the motor 61 is fixedly connected to a drive rod 62, and the lower end of the drive rod 62 has a hexagonal groove and a hexagonal rod 63 is slidably inserted therein. The lower end of the hexagonal rod 63 is fixedly connected to a chuck 64, and a disc 65 is fixedly sleeved on the lower outer wall of the chuck 64. A protrusion 66 is fixedly connected to the bottom surface of the disc 65. A third electric push rod 67 is fixedly mounted on the top surface of the drill bit 1, and the telescopic end of the third electric push rod 67 is rotatably connected to the disc 65 through a bearing. A battery (not shown in the figure) is provided on the mounting platform 2 to power the components on the drill bit 1, thereby reducing the need for external wiring (the specific electrical connection method is common knowledge in the prior art, which should be clear to those skilled in the art, and will not be described in detail here).

[0032] In this embodiment, after the motor 61 of the drive mechanism 6 is started, its output shaft drives the drive rod 62, which is fixed to it, to rotate. The drive rod 62 has a hexagonal groove inside, which slides into the upper end of the hexagonal rod 63. This non-circular cross-section ensures effective torque transmission. Therefore, the rotation of the drive rod 62 drives the internal hexagonal rod 63 to rotate synchronously, which in turn drives the clamp 64 fixed to the lower end of the hexagonal rod 63 and the disc 65 fixedly sleeved on the outer wall of the clamp 64 to rotate together.

[0033] The bottom surface of the disc 65 is rotatably connected to the telescopic end of the third electric push rod 67 via a bearing. The bearing allows the disc 65 to rotate freely without transmitting rotational torque to the third electric push rod 67. When it is necessary to switch the driven object (auxiliary mechanism 7 or vibration mechanism 8), the telescopic end of the third electric push rod 67 is controlled to push or pull the disc 65, thereby causing the chuck 64 and the hexagonal rod 63 to rise and fall vertically as a whole. The hexagonal rod 63 slides within the hexagonal groove of the drive rod 62, ensuring that the power transmission path remains connected during the lifting process.

[0034] Please refer to it again. Figures 11 to 13 The limiting part 71 includes a movable groove 711. Multiple movable grooves 711 are arranged in a ring at the lower end of the drill bit 1. Movable grooves 712 are provided on both sides of the movable grooves 711. A limiting block 713 is slidably connected in the movable groove 712. A first compression spring 714 is fixedly connected between the limiting block 713 and the movable groove 712. A sealing block 715 is slidably connected in the limiting block 713. A through hole 716 is provided on the sealing block 715. A second compression spring 717 is fixedly connected between the sealing block 715 and the limiting block 713. A water outlet hole 718 and a through groove 719 are provided at one end of the limiting block 713. A force-bearing rod 7110 is also fixedly connected to the inner wall of the limiting block 713 by a bracket.

[0035] Please refer to it again. Figures 6 to 13 The drive unit 72 includes hollow rods 721. Multiple hollow rods 721 are rotatably connected to the drill bit 1 in a ring-shaped arrangement. The lower ends of the hollow rods 721 are rotatably connected to the inner wall of the movable groove 711 via bearings. A gear 722 is fixedly sleeved on the upper end of the hollow rods 721. A gear ring 723 is rotatably connected to the upper end of the drill bit 1. A chuck 724 is fixedly connected to the inner ring of the gear ring 723 via a support rod. A groove that matches the chuck head 64 is provided at the center of the chuck 724. The hollow rod 721 has a drainage hole 725 at its lower end and a nut block 726 fitted onto its lower end. A guide rod 727 is fixedly connected in the movable groove 711. An abutment block 728 is slidably connected on the guide rod 727 and is fixedly connected to the nut block 726. The hollow rod 721 has a thread that matches the nut block 726 at one end in the movable groove 711 and is threadedly connected to the nut block 726.

[0036] In this embodiment, before performing the gear set switching operation, it is necessary to ensure that the power connection between the drive mechanism 6 and the auxiliary mechanism 7 has been established. Specifically, the third electric push rod 67 is extended to push the disc 65 and the chuck 64 fixed thereon upwards, so that the chuck 64 is inserted into and engaged in the slot of the chuck 724 in the auxiliary mechanism 7. The upper end of the chuck 64 is designed with a small guide cone and chamfer, so that even if there is a slight angular deviation during the insertion process, it can automatically correct its alignment through slight deflection upon contact, ensuring smooth insertion into the slot and achieving a reliable power connection.

[0037] The motor 61 of the drive mechanism 6 is activated, and power is transmitted sequentially through the drive rod 62 and the hexagonal rod 63 to the chuck 64, causing the chuck 724 to rotate. The chuck 724 is fixedly connected to the gear ring 723 via a support rod, thereby driving the gear ring 723 to rotate synchronously. The gear ring 723 meshes with multiple circumferentially distributed gears 722, driving these gears 722 and the hollow rod 721 fixed coaxially with them to rotate. The lower end of the hollow rod 721 has a threaded section, forming a lead screw and nut pair with the nut block 726. Therefore, the rotation of the hollow rod 721 is converted into the linear motion of the nut block 726 in the vertical direction. The nut block 726 is fixedly connected to the abutment block 728 and slides together along the fixed guide rod 727. When the nut block 726 drives the abutment block 728 to move upward until it disengages from the force-bearing rod 7110 in the limiting part 71, the pressure applied to the force-bearing rod 7110 disappears. At this time, the limiting block 713, which was originally pressed out by the abutting block 728 and inserted into the limiting hole 404 of the mounting base 402 of the first gear set 41, retracts and resets into the moving groove 712 under the action of the rebound force of the first compression spring 714, thereby releasing the locking of the first gear set 41 and putting it in a state that can be freely raised and lowered.

[0038] After the first gear set 41 is unlocked, height switching can be performed. The first electric push rod 512 controlling the first control unit 51 retracts, driving the first lifting plate 511 and all the hexagonal prisms 401 of the first gear set 41 connected to it to rise, thereby lifting the gear set 403 off the working surface and putting it into standby mode. Subsequently, the second electric push rod 522 controlling the second control unit 52 extends, driving the second lifting plate 521 and all the hexagonal prisms 401 of the second gear set 42 to descend, causing the gear set 403 to descend to the working position (below the raised first gear set 41), ready to take over the drilling operation.

[0039] After the second gear set 42 descends into position, it needs to be locked to ensure stability during drilling. The control motor 61 reverses, transmitting power in the opposite direction along the aforementioned transmission chain, ultimately driving the hollow rod 721 to rotate in the opposite direction. The reverse rotation of the hollow rod 721 drives the nut block 726 and the abutment block 728 to move downwards along the guide rod 727. The downward-moving abutment block 728 presses against the force-bearing rod 7110, forcing the limiting block 713 to overcome the elastic force of the first compression spring 714, protruding outwards from the moving slot 712 and inserting into the limiting hole 404 of the mounting base 402 of the second gear set 42. At this time, the first compression spring 714 is in a compressed, energy-storing state, providing power for the next unlocking. Through this mechanical locking, the mounting base 402 of the second gear set 42 is fixed, its working position is stabilized, and it can withstand the radial force and vibration generated during drilling, thereby improving drilling stability.

[0040] Please refer to it again. Figure 6 The water supply channel 73 includes a water storage tank 731, which is located on the mounting platform 2. A water inlet pipe 732 is rotatably connected to the water storage tank 731 via a sealed bearing. The upper end of the hollow rod 721 is rotatably connected to the mounting platform 2 via a bearing and is connected to the water storage tank 731.

[0041] In this embodiment, when the gear set switching is completed, the limiting block 713 extends out under the drive of the auxiliary mechanism 7 and inserts into the limiting hole 404 of the working gear set mounting base 402. The top rod 405 fixedly connected in the limiting hole 404 will be inserted into the through groove 719 at the end of the limiting block 713 and press against the end face of the sealing block 715.

[0042] Under the pressure of the push rod 405, the sealing block 715 overcomes the elastic force of the second compression spring 717 and slides into the limiting block 713, compressing and storing energy in the second compression spring 717. At this time, the side wall of the sealing block 715 is no longer in close contact with the inner wall of the limiting block 713, allowing the two ends of the through hole 716 on the sealing block 715 to be connected; the sealing block 715 also no longer blocks the water outlet hole 718 on the side wall of the limiting block 713. Thus, the internal water passage through the limiting block 713 is fully opened.

[0043] When cooling and lubrication of the working gear 403 are required, the external water supply system is activated. Clean water is pumped through the inlet pipe 732 into the water storage tank 731 located on the mounting platform 2. The water storage tank 731 is connected to the upper inlet of multiple circumferentially distributed hollow rods 721, through which water enters the interior of the hollow rods 721. The water flows down along the cavity inside the hollow rod 721 and finally flows out from the drain hole 725 at its lower end, entering the movable groove 711 on the drill bit 1. The water flowing into the movable groove 711, under pressure, flows into the internal cavity of the limiting block 713 through the opening at its root. Subsequently, the water flows sequentially through the through hole 716 on the through-sealed block 715 and the water outlet hole 718 on the side wall of the limiting block 713. The cooling water flowing out from the water outlet hole 718 enters the corresponding water supply tank 407 on the mounting base 402.

[0044] Cooling water flows along the water inlet 407 and is finally sprayed out from the outlet 406 fixed on the mounting base 402, onto the working roller cone 403 below. This directly cools the roller cone 403, which is hot due to friction, preventing it from overheating in a short time. On the other hand, it wets the dry rock powder generated during drilling, forming mud, which significantly reduces the dry friction resistance between the rock powder particles and the surface of the roller cone 403, improving rock breaking efficiency and protecting the roller cone.

[0045] It should be noted that, when the limiting block 713 is not inserted by the push rod 405, the end of the sealing block 715 inside it is always tightly pressed against the inner end face of the limiting block 713 under the elastic force of the second compression spring 717. In this state, the end of the sealing block 715 blocks the water outlet hole 718 on the side wall of the limiting block 713. At the same time, the side wall of the sealing block 715 is tightly fitted with the inner wall of the limiting block 713, so that its own through hole 716 is also blocked by the side wall and cannot be connected. This sealing design ensures that water cannot flow out from the limiting block 713, thereby realizing that the cooling water is only supplied to the working gear set and avoiding water waste.

[0046] Please refer to it again. Figure 6 and Figure 10 The vibration mechanism 8 includes a lifting groove 81. Multiple lifting grooves 81 are arranged in a ring at the upper end of the drill bit 1. A lifting rod 82 is slidably connected inside the lifting groove 81. A fixing ring 83 is fixedly sleeved on the outer wall of the lifting rod 82. A third compression spring 84 is fixedly connected between the fixing ring 83 and the lifting groove 81. A striking rod 85 is connected in a ring on the fixing ring 83. An impact head 86 is fixedly connected to the lower end of the lifting rod 82.

[0047] In this embodiment, after drilling is completed and the drill bit 1 is removed from the pile hole, a large amount of drill cuttings often accumulate and adhere inside the drill bit 1, requiring cleaning. At this time, the power of the equipment needs to be switched from drilling mode to discharge mode. First, the third electric push rod 67 is shortened, driving the disc 65 connected to it via a bearing and the chuck 64 fixed thereon to move downwards as a whole. This action disengages the chuck 64 from the chuck 724 of the auxiliary mechanism 7, and simultaneously lowers the protrusion 66 on the bottom surface of the disc 65 to a suitable contact height corresponding to the top of the lifting rod 82 of the vibration mechanism 8, preparing for driving the vibration mechanism 8. It should be noted that when the drive mechanism 6 drives the chuck 724 to rotate, the protrusion 66 will not contact the lifting rod 82, and therefore no vibration will occur.

[0048] The motor 61 of the drive mechanism 6 is activated, causing the disc 65 to rotate at a constant speed. During rotation, the protrusion 66 on the bottom surface of the disc 65 periodically contacts and presses against the top of the lifting rod 82 located directly below it. When the protrusion 66 rotates to contact the lifting rod 82, it generates downward pressure. This pressure forces the lifting rod 82 to slide downwards along the lifting groove 81, simultaneously causing the fixed ring 83, which is fixedly sleeved on it, to move downwards as well. The striking rod 85 connected to the fixed ring 83 and the impact head 86 fixed to the lower end of the lifting rod 82 also move downwards. During this process, the third compression spring 84 between the fixed ring 83 and the bottom of the lifting groove 81 is compressed, storing elastic potential energy. When the protrusion 66 moves away from the top of the lifting rod 82 as the disc 65 continues to rotate, the downward pressure instantly disappears. At this time, the compressed third compression spring 84 releases its stored elastic potential energy, generating a rebound force that pushes the fixed ring 83 and the connected lifting rod 82, striking rod 85, and impact head 86 back upwards rapidly.

[0049] As the disc 65 continues to rotate, the pressing and releasing action of the protrusion 66 on the lifting rod 82 occurs cyclically, causing the entire vibration mechanism 8 to produce reciprocating up-and-down linear motion. The reciprocating impact head 86 acts like a built-in ram, directly impacting the drill cuttings accumulated in the inner cavity of the drill bit 1, loosening and breaking them. At the same time, the multiple striking rods 85 connected to the fixing ring 83 periodically strike the upper end of the drill bit 1 during their up-and-down movement. This continuous striking causes the drill bit 1 to vibrate. Under the action of vibration, the friction between the inner wall of the drill bit 1 and the drill cuttings, as well as the cohesive force between the drill cuttings particles, are greatly weakened. The adhered drill cuttings are peeled off, and the loosened drill cuttings are more easily discharged from the bottom opening of the drill bit 1 under the action of gravity, thus efficiently and thoroughly completing the cuttings removal work and preparing for the next drilling.

[0050] The working principle of this invention is as follows: During construction, drill bit 1 rotates under the drive of the rotary drilling rig, and rock-breaking drilling is performed by the first gear set 41 or the second gear set 42 in the working position. When it is necessary to switch gear sets, the third electric push rod 67 of the drive mechanism 6 pushes the chuck 64 to engage with the chuck 724 of the auxiliary mechanism 7, and the motor 61 drives the hollow rod 721 to rotate. The movement of the nut block 726 and the contact block 728 releases the lock on the currently working gear set. Subsequently, the first control unit 51 or the second control unit 52 controls the corresponding gear set to rise and fall, completing the switch between working and standby states. After switching to the correct position, the drive mechanism 6 reverses, driving the limit unit 71 to... The limiting block 713 extends and inserts into the limiting hole 404 of the new working gear assembly mounting seat 402 to achieve mechanical locking. At the same time, the push rod 405 pushes open the sealing block 715, so that the cooling water of the water supply channel 73 can be sprayed to the working gear 403 through the water outlet 406 for cooling and lubrication. After drilling is completed, the third electric push rod 67 is controlled to move the chuck 64 down and align the protrusion 66 of the disc 65 with the lifting rod 82 of the vibration mechanism 8. The drive mechanism 6 drives the disc 65 to rotate. The protrusion 66 periodically presses the lifting rod 82 to drive the impact head 86 and the striking rod 85 to generate reciprocating vibration, thereby efficiently shaking off and discharging the slag in the drill bit 1.

[0051] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A rotary drilling and hard cutting construction device for interlocking pile construction, comprising a drill bit, a mounting platform, and a plurality of connecting rods connecting the drill bit and the mounting platform, characterized in that, Also includes: The first and second gear sets are both mounted on the drill bit. The first control unit and the second control unit are both mounted on the mounting platform and independently control the vertical height of the first gear set and the second gear set to adjust the working status of the two gear sets. The drive mechanism is located below the mounting platform and is used to provide power; The auxiliary mechanism includes a limiting part on the drill bit, a driving part for driving the limiting part to move, and a water supply channel on the driving part. The limiting part is used to lock the gear set in the working state. A vibration mechanism, located at the top of the drill bit, is used to provide vibration to facilitate material discharge.

2. The rotary drilling hard cutting construction equipment for interlocking pile construction according to claim 1, characterized in that: Both the first and second gear sets include hexagonal prisms. Multiple hexagonal prisms are arranged in a ring and slidably inserted into the drill bit. The lower end of the hexagonal prism is fixedly connected to a mounting base. Gears are fixedly installed on the mounting base. Limiting holes are opened on both sides of the mounting base. A push rod is fixedly connected in the limiting hole. A water outlet is fixedly connected to the mounting base. A water delivery groove is also opened on the mounting base. The limiting hole and the water outlet are connected through the water delivery groove.

3. The rotary drilling hard cutting construction equipment for interlocking pile construction according to claim 2, characterized in that: The first control unit includes a first electric push rod, which is fixedly mounted on the mounting platform. The lower end of the first electric push rod is fixedly connected to a first lifting plate, and the first lifting plate is fixedly connected to a hexagonal prism on the first gear set.

4. The rotary drilling hard cutting construction equipment for interlocking pile construction according to claim 2, characterized in that: The second control unit includes a second electric push rod, which is fixedly mounted on the mounting platform. The lower end of the second electric push rod is fixedly connected to a second lifting plate, and the second lifting plate is fixedly connected to a hexagonal prism on the second gear set.

5. The rotary drilling hard cutting construction equipment for interlocking pile construction according to claim 1, characterized in that: The drive mechanism includes a motor, which is fixedly mounted on the mounting platform. A drive rod is fixedly connected to the lower end of the motor's output shaft, and a hexagonal groove is provided at the lower end of the drive rod, through which a hexagonal rod is slidably inserted. A chuck is fixedly connected to the lower end of the hexagonal rod, and a disc is fixedly fitted on the outer wall of the lower end of the chuck. A protrusion is fixedly connected to the bottom surface of the disc, and a third electric push rod is fixedly mounted on the top surface of the drill bit. The telescopic end of the third electric push rod is rotatably connected to the disc through a bearing.

6. The rotary drilling hard cutting construction equipment for interlocking pile construction according to claim 5, characterized in that: The limiting part includes a movable groove, and multiple movable grooves are arranged in a ring at the lower end of the drill bit. Moving grooves are provided on both sides of the movable groove. A limiting block is slidably connected in the moving groove. A first compression spring is fixedly connected between the limiting block and the moving groove. A sealing block is slidably connected in the limiting block. A through hole is provided on the sealing block. A second compression spring is fixedly connected between the sealing block and the limiting block. A water outlet hole and a through groove are provided at one end of the limiting block. A force-bearing rod is also fixedly connected to the inner wall of the limiting block by a bracket.

7. The rotary drilling hard cutting construction equipment for interlocking pile construction according to claim 6, characterized in that: The drive unit includes hollow rods, multiple hollow rods are rotatably connected to the drill bit in a ring, and the lower end of the hollow rods is rotatably connected to the inner wall of the movable groove via bearings. A gear is fixedly sleeved on the upper end of the hollow rods, and a gear ring is rotatably connected to the upper end of the drill bit. A chuck is fixedly connected to the inner ring of the gear ring by a support rod, and a groove for matching the chuck head is opened at the center of the chuck. A drain hole is opened at the lower end of the hollow rods, and a nut block is sleeved on the lower end of the hollow rods. A guide rod is fixedly connected in the movable groove, and an abutment block is slidably connected on the guide rod, and the abutment block is fixedly connected to the nut block.

8. The rotary drilling hard cutting construction equipment for interlocking pile construction according to claim 7, characterized in that: The hollow rod has a thread at one end located in the movable groove that matches the nut block, and the hollow rod is threadedly connected to the nut block.

9. A rotary drilling hard-cutting construction device for interlocking pile construction according to claim 6, characterized in that: The water supply channel includes a water storage tank, which is located on the mounting platform. A water inlet pipe is rotatably connected to the water storage tank via a sealed bearing. The upper end of the hollow rod is rotatably connected to the mounting platform via a bearing and is connected to the water storage tank.

10. A rotary drilling hard-cutting construction device for interlocking pile construction according to claim 1, characterized in that: The vibration mechanism includes a lifting groove, with multiple lifting grooves arranged in a ring at the upper end of the drill bit. A lifting rod is slidably connected inside the lifting groove. A fixing ring is fixedly sleeved on the outer wall of the lifting rod. A third compression spring is fixedly connected between the fixing ring and the lifting groove. A striking rod is connected in a ring on the fixing ring. An impact head is fixedly connected to the lower end of the lifting rod.

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