A mast for a rotary digging apparatus
By combining a responsible mast structure with a robotic arm, the problem of insufficient mast flexibility in rotary drilling rigs is solved, enabling flexible adjustment of mast length and angle, thus improving construction efficiency and operational accuracy.
Patent Information
- Application Number
- CN202522012928.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-18
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-18
AI Technical Summary
The mast design of traditional rotary drilling rigs results in insufficient equipment flexibility, making it unable to adapt to the diverse needs of complex construction scenarios. Furthermore, the fixed length prevents flexible adjustment, increasing construction costs and reducing efficiency.
A retractable mast structure was designed, which is connected to the robotic arm via a slewing bearing. Combined with hydraulic cylinders to adjust the angle and length, and equipped with a power head, winch, and pressurizing cylinder, it enables flexible rotation and length adjustment of the mast, thereby enhancing drilling capacity and work efficiency.
It enhances the operational flexibility and versatility of rotary drilling rigs, improves construction efficiency, and performs exceptionally well in hard strata and deep hole operations, ensuring operational safety and accuracy.
Smart Images
Figure CN224679449U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of engineering equipment, and more particularly to improvements in rotary drilling rigs, specifically a mast for rotary drilling equipment. Background Technology
[0002] In the current field of rotary drilling rigs, traditional equipment is typically bulky, and its mast design has certain limitations. Generally, the mast of a conventional rotary drilling rig is fixedly connected to the main unit, and cannot be directly integrated with the tracked chassis, resulting in insufficient overall equipment flexibility. This design makes the mast poorly adaptable to different operating environments, making it difficult to meet the diverse requirements for drilling angles and positions in complex construction scenarios. Furthermore, the fixed length of traditional masts cannot be flexibly adjusted according to the actual drilling depth. When facing drilling tasks at different depths, it is often necessary to replace the entire mast or add auxiliary equipment, which not only increases construction costs but also reduces construction efficiency. Therefore, it is necessary to optimize and improve the mast structure of rotary drilling rigs to better adapt to the needs of flexible construction. Utility Model Content
[0003] To achieve the above objectives, this utility model is implemented as follows:
[0004] A mast for a rotary drilling rig includes a mast body, the middle of which is rotatably connected to an external drive device. The top of the mast body is connected to the external drive device via a pair of hydraulic cylinders. A crane is mounted on the top of the mast body. A power head for clamping and driving the drill pipe is mounted on the outer side of the mast body. The power head is pulled by a wire rope, which passes through the crane and is connected to a winch. The winch is fixedly mounted on the bottom rear end of the mast body via a fixed bracket. A pressure cylinder is also mounted on the mast body, and the pressure cylinder is vertically positioned... The mast body has a front side, with one end of the pressurizing cylinder connected to the mast body and the other end connected to the power head. The power head moves up and down along the guide rail on the mast body under the traction of the winch and the wire rope, as well as the action of the pressurizing cylinder. A slewing bearing is provided in the middle of the mast body, and a cylinder connecting seat is provided at the top of the mast body for connecting the cylinder. The mast body has a splicable structure. By setting an assembly splicing structure at the ends of the two mast bodies, two short mast bodies can be spliced into a longer mast body.
[0005] The mast used in the rotary drilling equipment has a roller-type slewing bearing. Its inner ring is fixedly connected to the mast body by high-strength bolts, and its outer ring is fixedly connected to the external drive device by high-strength bolts to withstand large axial and radial forces and ensure stable rotation between the mast body and the external drive device.
[0006] The mast for rotary drilling equipment includes a power head comprising a hydraulically driven multi-jaw chuck clamping device and a hydraulic motor drive device. The clamping device is used to firmly clamp drill rods of different specifications, ensuring that the drill rods do not loosen when rotating or subjected to axial force. The drive device drives the drill rods to rotate at high speed through gear transmission, realizing the power output required for drilling operations.
[0007] The mast used for rotary drilling equipment has a fixed bracket that is a square frame structure welded to the side of the mast body, with multiple diagonal and transverse reinforcing ribs to enhance the connection strength. The winch is tightly connected to the fixed bracket by bolts, and the fixed bracket has precise positioning holes for installing the winch, ensuring that the winch is stable and reliable during operation and can withstand the large tension generated when the wire rope is wound and unwound.
[0008] The mast used in the rotary drilling equipment has a double-acting hydraulic cylinder whose cylinder body is hinged to a mounting seat on the front of the mast body via a trunnion, and whose piston rod is hinged to a connecting seat on the top of the power head via a trunnion. The guide rail is a T-shaped guide rail located on the front of the mast body, and T-shaped sliders are provided on both sides of the power head to ensure stability during the up-and-down movement of the power head and prevent it from tilting under force, thereby ensuring the verticality and accuracy of the drilling. The wire rope is a high-strength alloy steel wire rope, with its two ends connected to the power head and the winch respectively via shackles, and passing through the pulley block of the overhead crane in the middle to achieve traction control.
[0009] The mast for rotary drilling equipment has a cylinder connecting seat that is a rectangular flange structure located on the top of the mast body. It has multiple evenly distributed bolt holes for connecting to the end flange of the cylinder with high-strength bolts, ensuring the connection strength and stability between the cylinder and the mast body to adapt to different stress conditions during operation.
[0010] The mast for rotary drilling equipment, wherein the prefabricated splicing structure includes a connecting flange disposed at the end of the mast body, the connecting flange having multiple high-strength bolt holes, and the connecting flanges of adjacent sections of the mast body being tightly connected by high-strength bolts and nuts to achieve rapid splicing and reliable fixing of the mast; the contact surface of the connecting flange is provided with a sealing gasket to prevent rainwater and dust from entering, ensuring the sealing and corrosion resistance of the connection.
[0011] The mast proposed in this invention is connected to the robotic arm via a slewing bearing, allowing for flexible rotation and angle adjustment via hydraulic cylinders. It also features a responsive structure, enabling rapid length adjustments based on drilling depth requirements, significantly enhancing operational flexibility and versatility. Furthermore, the power head on the mast can move up and down via a winch and wire rope, and can also generate strong downward pressure under the action of a pressurized hydraulic cylinder, effectively enhancing drilling capacity and improving work efficiency, especially when dealing with hard strata or deep holes. Further, the winch is installed at the bottom of the mast's back, with a fixed bracket, ensuring operational stability and ease of maintenance. The mast uses a roller-type slewing bearing, capable of withstanding large axial and radial forces, ensuring stability in connection with the robotic arm, preventing swaying during drilling, and ensuring operational safety and accuracy. Simultaneously, the hydraulic cylinder connecting seat design at the top of the mast changes the traditional connection method, enabling integration with a tracked chassis, allowing the mast to adjust its position and posture with the robotic arm, enhancing the overall mobility of the machine.
[0012] In summary, this mast structure optimizes component integration and layout, enabling efficient collaborative operation of all components and significantly improving the performance and functional integration of the rotary drilling rig. Attached Figure Description
[0013] Figure 1 This is a schematic diagram illustrating the usage of the mast shown in this utility model. Figure 1 .
[0014] Figure 2 This is a schematic diagram illustrating the usage of the mast shown in this utility model. Figure 2 .
[0015] Figure 3 This is a schematic diagram illustrating the usage of the mast shown in this utility model. Figure 3 . Detailed Implementation
[0016] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.
[0017] like Figures 1-3As shown, a mast for a rotary drilling rig includes a mast body. The middle part of the mast body is rotatably connected to an external drive device. The top of the mast body is connected to the external drive device via a pair of hydraulic cylinders. A crane is installed at the top of the mast body. A power head for clamping and driving the drill pipe is installed on the outer side of the mast body. The power head is pulled by a steel wire rope, which passes through the crane and is connected to a winch. The winch is fixedly installed at the bottom rear end of the mast body by a fixed bracket. A pressure cylinder is also installed on the mast body, and the pressure cylinder is vertically positioned. The pressurizing cylinder is positioned on the front of the mast body, with one end connected to the mast body and the other end connected to the power head. The power head moves up and down along the guide rail on the mast body under the traction of the winch and the wire rope, as well as the action of the pressurizing cylinder. A slewing bearing is provided in the middle of the mast body, and a cylinder connecting seat is provided at the top of the mast body for connecting the cylinder. The mast body is a connectable structure. By setting an assembly-type connecting structure at the ends of the two mast bodies, two short mast bodies can be spliced into a longer mast body.
[0018] The aforementioned mast, combined with a tracked excavator chassis equipped with a robotic arm, enables a new rotary drilling rig structure that is flexible in relocation and simultaneously provides drilling capabilities, as detailed below:
[0019] As shown in Figure 1, a long-arm rotary drilling rig includes a tracked undercarriage 1, an upper chassis 2 rotatably connected to the tracked undercarriage 1, a cab 3 mounted on the upper chassis 2, a counterweight module 4, a powertrain 5, and a hydraulic pump station 6 located behind the cab 3; it also includes a robotic arm 7 located in front of the cab 3. A mast 8 is provided at the front end of the robotic arm 7, the middle part of the mast 8 is rotatably connected to the robotic arm 7, and the top of the mast 8 is connected to the middle part of the robotic arm 7 through a pair of hydraulic cylinders 9. At the same time, the tail end of the robotic arm 7 is rotatably connected to the upper chassis 2, and a drive hydraulic cylinder 10 is also provided between the robotic arm 7 and the upper chassis 2. Furthermore, a crane 11 is installed at the top of the mast 8, and a power head 12 for clamping and driving the drill pipe is installed on the outside of the mast 8. The power head 12 is pulled by a wire rope 13, which passes through the crane 11 and is connected to a winch 14, which is fixed on the mast 8.
[0020] The middle part of the mast 8 is rotatably connected to the robotic arm 7 via a slewing bearing 15. The inner ring of the slewing bearing 15 is fixed to the mast 8, and the outer ring is fixed to the robotic arm 7, so that the mast 8 can rotate flexibly relative to the robotic arm 7, while ensuring the stability and load-bearing capacity of the connection to adapt to different angles and force requirements during the drilling operation.
[0021] The power head 12 includes a clamping device 16 and a drive device 17. The clamping device 16 adopts a hydraulically driven multi-jaw chuck structure, which can firmly clamp drill rods of different specifications and ensure that the drill rods will not loosen when rotating and subjected to axial force. The drive device 17 is a hydraulic motor, which drives the drill rod to rotate through gear transmission and moves up and down along the mast under the traction of the winch and wire rope, realizing the power output required for drilling operations. The hydraulic motor has the advantages of large torque, compact structure and fast response, which can effectively improve drilling efficiency and quality.
[0022] The winch 14 is fixed to the mast 8 by a fixed bracket 18. The fixed bracket 18 is a square frame structure welded to the side of the mast 8, and has multiple reinforcing ribs to enhance the connection strength. The winch 14 is installed inside the fixed bracket 18 and is tightly connected to the fixed bracket 18 by bolts to ensure that the winch 14 is stable and reliable during operation and can withstand the large tension generated when the wire rope 13 is wound up and down. At the same time, the design of the fixed bracket 18 also facilitates the installation, disassembly and maintenance of the winch 14.
[0023] At least two drive cylinders 10 are installed between the robotic arm 7 and the upper chassis 2. These drive cylinders 10 are evenly distributed along the length of the robotic arm 7 and are synchronously controlled by the hydraulic system, enabling the robotic arm 7 to adjust its angle smoothly and accurately to meet the drilling requirements at different depths and positions. At the same time, the arrangement of multiple drive cylinders 10 can share the force, improve the overall load-bearing capacity and operational stability of the robotic arm 7, and extend the service life of the equipment.
[0024] The bottom of the mast 8 is connected to the front end of the robotic arm 7 via a connecting flange 19. The connecting flange 19 has multiple high-strength bolt holes, and the mast 8 and the robotic arm 7 are tightly connected together using high-strength bolts to ensure the strength and rigidity of the connection and effectively transmit torque and axial force during the drilling process. At the same time, the structure of the connecting flange 19 facilitates the assembly and disassembly of the mast 8 and the robotic arm 7, which is beneficial for the transportation, installation and maintenance of the equipment, and improves the maintainability and flexibility of the equipment.
[0025] like Figure 2As shown, the mast 8 is a connectable structure. By setting the end of the two masts 8 with the prefabricated connecting structure 20, the two short masts 8 can be spliced into a longer mast 8, thereby meeting different drilling depth requirements. When the mast 8 is lengthened, according to the requirements of the overall machine weight distribution, the weight of the counterweight block 21 can be added to the counterweight module 4 behind the cab 3 to ensure the balance and operational stability of the whole machine.
[0026] When using the rotary drilling rig of the present invention, the equipment is first moved to the designated working position via the tracked chassis 1. The powertrain 5 and hydraulic pump station 6 are started to provide power for the entire drilling operation. The operator in the cab 3 controls the drive cylinder 10 between the tail end of the robotic arm 7 and the upper chassis 2 via the control handle to adjust the robotic arm 7 to a suitable angle and position. At the same time, by controlling a pair of cylinders 9 at the top of the mast 8 and the middle of the robotic arm 7, the angle of the mast 8 relative to the robotic arm 7 is adjusted to ensure that the mast 8 is in the optimal working posture.
[0027] During operation, the power head 12 first clamps the drill rod with the clamping device 16, then the drive device 17 starts, causing the drill rod to rotate. Simultaneously, the winch 14, through the cooperation of the wire rope 13 and the overhead crane 11, controls the up-and-down movement of the drill rod. When drilling downwards is required, the winch 14 releases the wire rope 13, and under the assistance of the drill rod's own weight and the hydraulic system, the drill rod gradually drills downwards, while the power head 12 drives the drill rod to rotate and cut the rock and soil. When the borehole reaches the predetermined depth, the winch 14 is reversed to tighten the wire rope 13, lifting the drill rod from the hole, completing one drilling cycle.
[0028] like Figure 3 As shown, when drilling is completed at one workstation and the operator needs to move to the next workstation, the operator first uses the winch 14 to smoothly lift the drill bit, completely detaching it from the borehole. Next, the operator operates the drive cylinder 10 between the tail end of the robotic arm 7 and the upper chassis 2 to slowly retract the robotic arm 7. Simultaneously, the mast 8 gradually moves closer to the main body of the machine as the robotic arm 7 retracts, reducing the equipment's footprint. Then, using the tracked walking function of the tracked lower chassis 1, driven by the hydraulic system, the tracked lower chassis 1 smoothly moves the entire equipment to the next workstation. Upon arrival at the new workstation, the robotic arm 7 and mast 8 are adjusted to suitable working positions again, and a new round of drilling operations begins.
[0029] This design, which allows for flexible coordination between the tracks, mast, and robotic arm, greatly improves the efficiency and operational flexibility of rotary drilling rigs at construction sites. It enables them to quickly respond to different operational needs in complex construction environments, effectively improving the overall progress and efficiency of construction.
[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. A mast for a rotary drilling rig, characterized in that, The system includes a mast body, the middle of which is rotatably connected to an external drive unit. The top of the mast body is connected to the external drive unit via a pair of hydraulic cylinders. A crane is mounted on the top of the mast body. A power head for clamping and driving drill pipes is mounted on the outer side of the mast body. The power head is pulled by a wire rope, which passes through the crane and connects to a winch. The winch is fixedly mounted on the bottom rear end of the mast body via a fixed bracket. A pressure cylinder is also mounted vertically on the mast body. The mast body has a front view, with one end of the pressurizing cylinder connected to the mast body and the other end connected to the power head. The power head moves up and down along the guide rail on the mast body under the traction of the winch and the wire rope, as well as the action of the pressurizing cylinder. A slewing bearing is provided in the middle of the mast body, and a cylinder connecting seat is provided at the top of the mast body for connecting the cylinder. The mast body is a connectable structure. By setting an assembly-type connecting structure at the ends of the two mast bodies, two short mast bodies can be spliced into a longer mast body.
2. The mast for rotary drilling equipment according to claim 1, characterized in that: The slewing bearing is a roller-type slewing bearing. Its inner ring is fixedly connected to the mast body by high-strength bolts, and its outer ring is fixedly connected to the external drive device by high-strength bolts to withstand large axial and radial forces and ensure stable rotation between the mast body and the external drive device.
3. The mast for rotary drilling equipment according to claim 1, characterized in that: The power head includes a hydraulically driven multi-jaw chuck clamping device and a hydraulic motor drive device. The clamping device is used to firmly clamp drill rods of different specifications to ensure that the drill rods will not loosen when rotating and subjected to axial force. The drive device drives the drill rods to rotate at high speed through gear transmission to achieve the power output required for drilling operations.
4. The mast for rotary drilling equipment according to claim 1, characterized in that: The fixed bracket is a square frame structure welded to the side of the mast body, with multiple diagonal and transverse reinforcing ribs to enhance the connection strength; the winch is tightly connected to the fixed bracket by bolts, and the fixed bracket is provided with precise positioning holes for installing the winch, ensuring that the winch is stable and reliable during operation and can withstand the large tension generated when the wire rope is wound and unwound.
5. The mast for rotary drilling equipment according to claim 1, characterized in that: The pressurizing cylinder is a two-way hydraulic cylinder, with its cylinder body hinged to the mounting seat on the front of the mast body via a trunnion, and the piston rod hinged to the connecting seat at the top of the power head via a trunnion. The guide rail is a T-shaped guide rail set on the front of the mast body, and T-shaped sliders are provided on both sides of the power head to ensure that the power head remains stable during up and down movement and to prevent it from tilting under force, thereby ensuring the verticality and accuracy of the drilling. The wire rope is a high-strength alloy steel wire rope, with its two ends connected to the power head and the winch respectively via shackles, and passing through the pulley block of the overhead crane in the middle to achieve traction control.
6. The mast for rotary drilling equipment according to claim 1, characterized in that: The hydraulic cylinder connecting seat is a rectangular flange structure located at the top of the mast body, with multiple evenly distributed bolt holes for connecting to the end flange of the hydraulic cylinder with high-strength bolts, ensuring the connection strength and stability between the hydraulic cylinder and the mast body to adapt to different stress conditions during operation.
7. The mast for rotary drilling equipment according to claim 1, characterized in that: The prefabricated splicing structure includes a connecting flange located at the end of the mast body. The connecting flange has multiple high-strength bolt holes. The connecting flanges of adjacent sections of the mast body are tightly connected by high-strength bolts and nuts to achieve rapid splicing and reliable fixing of the mast. The contact surface of the connecting flange is provided with a sealing gasket to prevent rainwater and dust from entering and to ensure the sealing and corrosion resistance of the connection.