Portable rotary drilling equipment for tower foundation pile hole construction in mountainous and hilly areas

Abstract

The portable rotary drilling equipment provided by the present invention for use in tower foundation pile hole construction in mountainous and hilly areas comprises a support module, a positioning and adjustment module, a drive module, and a drill module. The positioning and adjustment module comprises a first base, radial abutment mechanisms mounted on the first base and spaced circumferentially and abutting against the pile hole wall for positioning the adjustment module, and an axial abutment mechanism arranged vertically and having a front end acting on the drive module to propel the drill bit forward and adjust the drilling direction. The drive module comprises a second base, a motor mounted on the second base for driving the drill bit, and a reducer fixed to the motor shaft. The drill module comprises a barrel connected to the second base for holding slag, a drill rod located within the barrel and fixedly connected to the reducer output shaft, and a spiral blade drill bit fixed to the circumference of the drill rod. The present invention has a compact and simple structure, is easy to assemble and disassemble, and is compact and lightweight, making it convenient for transportation in mountainous and hilly areas.

Description

Technical Field

[0001] The present invention relates to the field of pile hole rotary drilling engineering for civil engineering foundation construction, and more specifically, to a portable rotary drilling device for pile hole construction operations for power transmission line tower foundations and wind power tower foundations in mountainous and hilly areas. Technical Background

[0002] With the continuous acceleration of infrastructure construction, mechanized construction has been widely used in various fields. However, due to the complex construction environment, scattered tower bases, inconvenient transportation and many other reasons, mechanized construction of transmission line construction has been greatly limited. Traditional construction methods have problems such as low construction efficiency and high labor intensity, and have been unable to adapt to the rapid development of transmission lines. In recent years, the State Grid Corporation of China has been committed to the research work of mechanized construction throughout the entire process. As an important part of the transmission line, the degree of mechanized construction of tower base construction is particularly important. The tower base construction mainly has the following characteristics:

[0003] 1. High-voltage transmission lines often pass through mountainous areas and river valleys with complex terrain. The tower bases are located in remote areas, which is not conducive to the entry of large-scale mechanized equipment.

[0004] 2. The transmission line is long, the geology along the line is complex and changeable, and the geological conditions at the tower base are complex and changeable, and there is unpredictability, which requires mechanical equipment to have the ability to construct complex strata.

[0005] 3. Each tower base is generally composed of 4 piles. The distance between tower bases is relatively far, and the construction area is extremely scattered. Mechanical equipment is frequently moved, making it difficult to take advantage of efficient construction.

[0006] Currently, the construction of transmission line tower foundations mostly uses impact drills and reverse circulation drills. The equipment is disassembled before entering the site and then transported to the construction site for assembly. The degree of mechanization during the construction process is low, requiring a large amount of manpower, and the quality of the piles formed by the equipment is poor, resulting in low construction efficiency.

[0007] To overcome the shortcomings of percussion and reverse circulation drills, a modular rotary drilling rig has been developed in the construction machinery industry. It features convenient operation, strong adaptability, safety, reliability, and high efficiency. The rotary drilling rig primarily consists of a travel mechanism, luffing mechanism, operator's cab, slewing platform, power system, hoisting mechanism, counterweight, hydraulic system, electrical system, drill mast, drill pipe, and drill bits. It can be disassembled into 10 sections. Once disassembled, each component weighs less than 5 tons, meeting the requirement for cableway transportation of no more than 5 tons in mountainous construction. The rotary drilling rig chassis utilizes retractable crawler tracks for superior stability and travel performance. During drilling operations, the rotary drilling rig features features such as travel lock, slewing protection, height limiter, and working range limiter. It also features oil temperature and oil level alarms, as well as inclination limiters. Remote control is also possible in complex and dangerous road conditions, ensuring operator safety. In addition, rotary drilling rigs are simpler to drill, requiring less on-site personnel and eliminating the need for secondary punching. The resulting slurry can be recycled and simply transported and discharged to a designated location after the foundation pile construction is completed. Compared to traditional bored piles, they are more economical and efficient in terms of labor, machinery, and construction technology. Domestic companies such as Sany Heavy Industry, XCMG, Zoomlion Heavy Industry, and Sunward Intelligent all have related products. However, existing rotary drilling rigs are large, heavy, and have many components. Because transmission line towers are scattered, especially in hilly and mountainous areas, transportation is difficult, and construction materials and equipment must be carried by people or horses, making existing rotary drilling machinery difficult to handle. Therefore, developing portable, modular, small rotary drilling equipment as soon as possible to adapt to the construction of transmission line towers and wind turbine towers in hilly and mountainous areas is an important challenge faced by scientific and technological workers in this field. Summary of the Invention

[0008] In view of the shortcomings of the existing tower foundation pile hole rotary drilling rig, such as heavy weight, difficulty in transportation, and inconvenience in construction in mountainous and hilly areas, the purpose of the present invention is to provide a portable rotary drilling equipment for tower foundation pile hole construction in mountainous and hilly areas to meet the needs of tower foundation and wind turbine tower foundation construction in hilly and mountainous areas.

[0009] The portable rotary drilling equipment provided by the present invention is used for the construction of tower foundation pile holes in mountainous and hilly areas. It is composed of a bracket module and a rotary drilling integrated module. The bracket module is composed of a bracket fixed on the ground and composed of a detachable truss rod and a lifting device placed on the bracket for lifting the rotary drilling integrated module; the rotary drilling integrated module is composed of a positioning and adjustment module, a drive module and a drill module. The positioning and adjustment module is composed of a first machine base, a plurality of radial abutting mechanisms installed on the first machine base and distributed at equal intervals along the circumferential direction to press against the pile hole wall for positioning the adjustment module, and a plurality of axial abutting mechanisms arranged in the vertical direction and having front ends acting on the drive module to push the drill bit to feed and adjust the drilling direction; the drive module is composed of a second machine base, a motor installed on the second machine base for driving the drill bit to rotate, and a reducer fixed on the motor shaft; the drill bit module is composed of a barrel connected to the second machine base for accommodating slag, a drill rod located in the barrel and fixedly connected to the output shaft of the reducer, and a spiral blade drill bit fixed on the drill rod.

[0010] The portable rotary drilling equipment of the present invention needs to be manually excavated before rotary drilling. If the pile holes are all rotary drilled using the equipment of the present invention, it is also necessary to design a device on the ground to guide the positioning and adjustment module, which is used to push the drill bit feed and adjust the drilling direction. The ground guide device can be composed of a guide frame and a guide rod. The guide frame is installed on the bracket through the guide rod provided on the bracket. The guide frame is mounted on the guide rod through a sliding connection pair. The guide frame is designed with a holding claw for holding and clamping the connection structure on the first base of the positioning and adjustment module, so that the device can be positioned during the initial excavation of the pile hole, push the drill bit feed and adjust the drilling direction. When rotary drilling in the pile hole, it is not necessary for it to be positioned, axially fed and vertically adjusted, but relies on the positioning and adjustment module in the rotary drilling integrated module to position, push the drill bit feed and adjust the drilling direction. The ground guide device can also be designed into other structural forms.

[0011] The present invention may further adopt the following technical measures, and the following technical measures may be implemented individually, in combination, or even together.

[0012] In the above technical solution of the present invention, further: the bracket is an equilateral triangle structure bracket, composed of two upper and lower triangular planar frames and three vertical rods, and the three vertical rods are respectively connected to the upper and lower triangular planar frames; the three guide rods constituting the ground guide device are preferably respectively arranged at the middle position of the truss rods forming the base of three approximate small triangles; the sliding connection structure connecting the guide frame and the guide rods is preferably a sliding connection structure composed of linear bearings; and the lifting device is preferably a lifting device composed of a pulley and an electric hoist. Together, they constitute a bracket module.

[0013] In the above technical solution of the present invention, further, the radial abutment mechanism may comprise a push block that abuts the pile hole wall and a hydraulic piston-cylinder drive mechanism, a pneumatic piston-cylinder drive mechanism, or a screw-nut drive mechanism acting on the push block, wherein the actuator of the hydraulic piston-cylinder drive mechanism, the pneumatic piston-cylinder drive mechanism, or the screw-nut drive mechanism is connected to the push block; preferably, a hydraulic or pneumatic piston-cylinder drive mechanism is used. The radial abutment mechanisms, evenly spaced along the circumference, may be arranged in a single layer or multiple layers, the specific number of layers depending on the pile hole depth and geological conditions. Furthermore, preferably, three radial abutment mechanisms are arranged in each layer, evenly spaced at 120° intervals.

[0014] In the above-mentioned technical solution of the present invention, the axial abutment mechanism can be a hydraulic piston-cylinder drive mechanism, a pneumatic piston-cylinder drive mechanism, or a screw-nut drive mechanism. The front end of the actuator of the drive mechanism is operatively connected to the second machine base to propel the drill bit forward and adjust the drilling direction. Hydraulic or pneumatic piston-cylinder drive mechanisms are preferred. Furthermore, the axial abutment mechanism preferably comprises three or four pairs. When there are three pairs, they are symmetrically distributed at 120° equal radii on a plane. When there are four pairs, they are symmetrically arranged at 90° equal radii on a plane to facilitate adjustment of the drilling direction.

[0015] In the above-mentioned technical solution of the present invention, a connecting shaft is designed on the top of the first machine base, which mates with the clamping claw on the guide frame to form a clamping mechanism. When the guide frame contacts the connecting shaft on the top block of the first machine base, the clamping claws of the clamping mechanism clamp the connecting shaft, driving the rotary drilling integrated module up and down along the guide rod. Furthermore, a touch sensor can be designed on one side of the clamping mechanism to automatically clamp the guide frame when it contacts the connecting shaft on the top block of the first machine base, thereby improving the operating efficiency of the equipment.

[0016] In the above technical solution of the present invention, the spiral blade drill bit can be an integral structure, and the entire structure is made of cemented carbide; it can also be designed to consist of a slag transport part and a rotary excavation part; in order to reduce the production cost of the equipment, the latter structural form is preferably adopted, and the transport part for transporting slag can be made of general steel, and the rotary excavation part for rotary excavation of soil, sand, gravel and rock is made of cemented carbide with good wear resistance and strength; or all of them are made of cemented carbide, but the thickness of the spiral blades of the slag transport part can be smaller, and the thickness of the spiral blades of the rotary excavation part can be larger, so as to enhance the strength of the spiral blades.

[0017] In the above technical solution of the present invention, the connection mode between the positioning adjustment module and the driving module in the rotary drilling integrated module can be a contact connection or a loose connection; when it is a contact connection, the connection between the bracket module and the rotary drilling integrated module is through the cable connection between the driving module and the lifting device; when it is a loose connection, the connection between the bracket module and the rotary drilling integrated module is through the cable connection between the positioning adjustment module and the lifting device.

[0018] The portable rotary drilling equipment provided by the present invention is used for tower foundation pile hole construction in mountainous and hilly areas, and the modules and main components are detachably connected.

[0019] The portable rotary drilling equipment provided by the present invention is suitable for tower foundation pile hole construction in mountainous and hilly areas. To facilitate construction in mountainous and hilly areas, it adopts a bionic design, drawing on the traditional method of workers excavating pile holes in a bucket. Multiple radial abutment mechanisms of the positioning and adjustment module are used to fix the drill bit at any position in the pile hole. Multiple axially retractable abutment mechanisms of the positioning and adjustment module are used to propel the drill bit axially. The drilling direction of the drill bit is adjusted by controlling the extension and contraction of different axial abutment mechanisms to correct the verticality of the pile hole. The spiral blade drill bit has a transport part for transporting debris and a rotary excavation part for rotary excavation of soil and rock made of different materials and thicknesses to reduce the drill bit's weight and cost and facilitate transport in separate modules. After the drill bit advances to a specified depth, an electric hoist fixed above the bracket is used to pull the drill bit out of the pile hole for soil unloading. Repeating this process multiple times completes the pile hole construction.

[0020] The portable rotary drilling equipment provided by the present invention for the construction of tower foundation pile holes in mountainous and hilly areas has a modular design, a compact and simple structure, easy assembly and disassembly, a small size, and a light weight. The weight of a single module does not exceed 100 kg, making it easy to transport in hilly and mountainous areas. By replacing drill bits of different specifications, it can be suitable for excavating tower foundation pile holes with a diameter of 0.9-1.4 meters and a depth of 8-15 meters in different geological conditions. It also has an automatic verticality correction function to ensure that the verticality of the pile hole meets the requirements for the construction of the iron tower foundation pile hole. The disclosure of the present invention provides a very practical device for excavating tower foundation pile holes in mountainous and hilly areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Attachment Figure 1 It is a structural schematic diagram of the portable pile hole rotary drilling equipment of the present invention.

[0022] Attachment Figure 2-1 It is a schematic diagram of the main structure of the bracket module of the portable pile hole rotary drilling device.

[0023] Attachment Figure 2-2 It is a schematic diagram of the top view of the structure of the bracket module of the portable pile hole rotary drilling device.

[0024] Attachment Figure 3-1 It is a schematic diagram of the main structure of the positioning adjustment module of the portable pile hole rotary drilling device.

[0025] Attachment Figure 3-2 It is a schematic diagram of the top view of the positioning and adjustment module of the portable pile hole rotary drilling device.

[0026] In the above drawings, the objects identified by the respective figure numbers are: 1-stratum; 2-protective wall; 3-soil transport part; 4-radial push-up mechanism; 5-linear bearing; 6-guide frame; 7-cable; 8-guide rod; 9-bracket; 10-pulley; 11-electric hoist; 12-earth transport trolley; 13-axial push-up mechanism; 14-drive module; 15-barrel; 16-spiral blade drill bit; 17-wheel; 18-guide rail of earth transport trolley; 19-top block; 20-connecting shaft. DETAILED DESCRIPTION

[0027] An embodiment of the present invention is described below in conjunction with the accompanying drawings to further illustrate the present invention. It should be noted that the specific implementation of the present invention is not limited to the form described in the embodiment.

[0028] This embodiment is a portable rotary drilling device for the construction of tower foundation pile holes in mountainous and hilly areas. Its structure is shown in the attached figure. Figure 1 To the attached Figure 3-2 As shown, it consists of a bracket module and a rotary drilling integrated module.

[0029] The structure of the support module is shown in the attached Figure 1 , Attachment Figure 2-1 and attached Figure 2-2 As shown, it consists of a bracket 9 fixed on the ground, a guide device arranged on the bracket and a lifting device arranged on the bracket for lifting the rotary drilling integrated module; the bracket is an equilateral triangle structure bracket, which is composed of two upper and lower triangular plane frames and vertical poles composed of detachable truss rods; the guide device is composed of a guide frame 6 and three guide rods 8, the guide frame is installed on the bracket through the guide rods arranged on the bracket, the guide frame is installed on the guide rods through a sliding connection pair composed of linear bearings 5, and the guide frame is designed with a holding claw constituting a holding pair; the three guide rods are respectively arranged at the middle position of the truss rods forming three approximate small triangle bases; the lifting device is composed of a pulley 10 and an electric hoist 11 arranged on the bracket, and is connected to the positioning adjustment module in the rotary drilling integrated module through a cable 7.

[0030] The rotary drilling integrated module is composed of a positioning adjustment module, a driving module (14) and a drill module. Figure 1 , Attachment Figure 3-1 and attached Figure 3-2The positioning and adjustment module is composed of a first machine base, three radial abutting mechanisms 4 installed on the first machine base and distributed at equal intervals along the circumference to press against the pile hole wall for fixing the positioning and adjustment module, and four axial abutting mechanisms 13 arranged in the vertical direction to act on the driving module to push the drill bit feed and adjust the drilling direction; the radial abutting mechanism is composed of a hydraulic piston cylinder driving mechanism and a push block 19 connected to its piston rod, and the three radial abutting mechanisms are spaced 120 meters apart. 0 Arrangement; the axial push-up mechanism is a hydraulic piston cylinder drive mechanism, and the four hydraulic piston cylinders are arranged symmetrically on the plane with equal radius at 90°, and their piston rods are hinged to the second base constituting the drive module; a connecting shaft 20 is designed on the top of the first machine base, which constitutes a holding and clamping mechanism with the holding claws on the guide frame in the support module, and is connected to the cable of the lifting device in the support module for lifting the entire rotary drilling integrated module.

[0031] The driving module consists of a second machine base, a motor installed on the second machine base for driving the drill bit to rotate, and a reducer fixed on the motor shaft. The second machine base is hingedly connected to the piston rod in the oil pressure piston cylinder of the positioning adjustment module as an axial support mechanism.

[0032] The drill bit module consists of a barrel 15 connected to the second machine base for accommodating slag, a drill rod located in the barrel and fixedly connected to the output shaft of the reducer, and a spiral blade drill bit 16 fixed on the circumference of the drill rod; the spiral blade drill bit consists of a slag transport part 3 and a rotary excavation part. The transport part for transporting slag is made of general steel, and the rotary excavation part for rotary excavating soil, sand, gravel and rock is made of hard alloy material with good wear resistance and strength, so as to reduce production costs and improve the life and working efficiency of the spiral blade drill bit.

[0033] The portable rotary drilling equipment of the present invention can replace spiral blade drill bits with different structures according to different geological conditions.

Claims

1. A portable rotary drilling device for tower foundation pile hole construction in mountainous and hilly areas, characterized in that The invention comprises a support module and a rotary drilling integrated module, wherein the support module comprises a support (9) fixed on the ground and composed of a detachable truss rod and a lifting device arranged on the support for lifting the rotary drilling integrated module; the lifting device comprises a pulley (10) and an electric hoist (11) suspended on the support; the support module is designed with a guide device composed of a guide frame (6) and a guide rod (8); the guide frame is installed on the support through the guide rod (8) arranged on the support, and the guide frame is installed on the guide rod through a sliding connection pair; the rotary drilling integrated module comprises a positioning adjustment module, a drive module (14) and a drill module; the positioning adjustment module comprises a first machine base, which is installed on the first machine base and along the circumferential direction. Multiple radial abutting mechanisms (4) for pressing against the pile hole wall at equal intervals for positioning and adjusting the module, and multiple axial abutting mechanisms (13) arranged along the vertical direction and having their front ends acting on the drive module to push the drill bit to feed and adjust the drilling direction; the guide frame is designed to have a holding clamping claw tightly connected to the first base of the positioning and adjusting module; the drive module comprises a second base, a motor mounted on the second base for driving the drill bit to rotate, and a reducer fixed to the motor shaft; the drill head module comprises a barrel (15) connected to the second base for accommodating slag, a drill rod (3) located in the barrel and fixedly connected to the output shaft of the reducer, and a spiral blade drill bit (16) fixed to the drill rod.

2. The portable rotary drilling equipment for tower foundation pile hole construction in mountainous and hilly areas according to claim 1 is characterized in that: The bracket is an equilateral triangle structure bracket, which is composed of two upper and lower triangular plane frames and a vertical pole.

3. The portable rotary drilling equipment for tower foundation pile hole construction in mountainous and hilly areas according to claim 2 is characterized in that: The three guide rods constituting the guide device are respectively arranged on truss rods forming three approximately triangular bases.

4. The portable rotary drilling equipment for tower foundation pile hole construction in mountainous and hilly areas according to claim 1 is characterized in that: The sliding connection pair connecting the guide frame and the guide rod is composed of linear bearings.

5. The portable rotary drilling equipment for tower foundation pile hole construction in mountainous and hilly areas according to any one of claims 1 to 4, characterized in that: The radial abutting mechanism (4) is composed of a top block (19) abutting against the pile hole wall and an oil pressure piston cylinder driving mechanism, a pneumatic piston cylinder driving mechanism or a screw nut driving mechanism acting on the top block. The number of layers of the multiple radial abutting mechanisms distributed at equal intervals along the circumferential direction is at least one.

6. The portable rotary drilling equipment for tower foundation pile hole construction in mountainous and hilly areas according to any one of claims 1 to 4, characterized in that: The top of the first machine base is designed with a connecting shaft (20) that matches the holding and clamping claws on the guide frame to form a holding and clamping mechanism, and a touch sensor is designed on one side of the holding and clamping mechanism.

7. The portable rotary drilling equipment for tower foundation pile hole construction in mountainous and hilly areas according to any one of claims 1 to 4, characterized in that: The axial push mechanism is a hydraulic piston cylinder drive mechanism, a pneumatic piston cylinder drive mechanism or a screw nut drive mechanism. The front end of the actuator of the drive mechanism is operatively connected to the second machine base to push the drill bit to feed and adjust the drilling direction.

8. The portable rotary drilling equipment for tower foundation pile hole construction in mountainous and hilly areas according to any one of claims 1 to 4, characterized in that: The rotary drilling part of the spiral blade drill bit is made of hard alloy material.

Images