Milling excavator for rotary drilling rig

Abstract

The milling excavator for the rotary drilling rig comprises two power head assemblies, wing plates are fixedly installed on the front side and the rear side of the lower portion of a base, the two power head assemblies are located between the two wing plates, and the two power head assemblies are movably installed at the two ends of the wing plates in a hinged mode respectively. Cutting wheels are rotationally installed on the front side and the rear side of the lower end of the power head assembly, a hydraulic motor used for driving the cutting wheels to rotate is installed on one side of the power head assembly, two positioning plates are fixedly installed on the outer side of the wing plate, a plurality of distance adjusting threaded holes are formed in the surfaces of the positioning plates, and the positioning plates are fixedly connected with the power head assembly at the corresponding positions through bolts. The positions of the bolts on the positioning plates are adjusted according to needs, so that the inclination angles of the two power head assemblies are adjusted to adapt to drilling of pile holes of different sizes, the whole power head assemblies do not need to be dismantled, and the working efficiency is improved. And the hydraulic motor and the transmission chain are arranged outside, thereby facilitating disassembly and maintenance and prolonging the service life.

Description

Technical Field

[0001] The utility model relates to the technical field of milling excavators, and particularly relates to a milling excavator for a rotary drilling rig. Background Technique

[0002] A milling excavator is a working device installed on a hydraulic excavator, which can efficiently replace general configurations such as a bucket, a breaker, and a hydraulic shear to perform cutting and milling work on various soils and building materials.

[0003] The utility model patent with the patent authorization announcement number CN202223240098.7 discloses an excavation component, an installation box body and a drill bit for a square pile drill bit, including an excavation wheel body and an excavation component arranged on the excavation wheel body. The excavation component includes a plurality of excavation elements arranged in a spiral regular arrangement or a spiral irregular arrangement or in a linear arrangement at an angle with the axis of the excavation wheel body on the excavation wheel body. Along the arrangement direction of the excavation elements, an excavation scraper is arranged beside the excavation elements. After the excavation elements excavate the soil and stone attached walls, the excavation scraper performs secondary cutting on the square pile attached walls to improve the flatness of the cutting surface of the excavation component.

[0004] However, there are still some disadvantages in the actual use of the above device. More obviously, its driving device is located inside the square pile drill bit, so it is not convenient for disassembly, installation and maintenance, and its service life is relatively low. At the same time, when the excavation length dimension of the square pile drill bit needs to be adjusted, it is necessary to find a corresponding extended excavation component to connect and fix it. For pile pits with small size differences, this method is more troublesome to operate and requires overall disassembly and replacement, resulting in low efficiency.

[0005] Therefore, it is very necessary to invent a milling excavator for a rotary drilling rig to solve the above problems. Content of the Utility Model

[0006] The purpose of the utility model is to provide a milling excavator for a rotary drilling rig to solve the problems of inconvenient installation and disassembly and inconvenient size adjustment mentioned in the above background technique.

[0007] According to one aspect of the present disclosure, the following technical solution is provided: A milling excavator for a rotary drilling rig includes a base connected to the rotary drilling rig, and further includes two power head assemblies. Wings are fixedly installed on the front and rear sides of the lower part of the base. The two power head assemblies are located between the two wings, and the two power head assemblies are respectively movably hinged and installed at both ends of the wings. Cutting wheels are rotatably installed on the front and rear sides of the lower end of the power head assembly. A hydraulic motor for driving the cutting wheel to rotate is installed on one side of the power head assembly. Two positioning plates are fixedly installed on the outer side of the wing. A plurality of distance adjustment threaded holes are provided on the surface of the positioning plate. The positioning plate is fixedly connected to the corresponding power head assembly through bolts.

[0008] The milling excavator for a rotary drilling rig according to at least one embodiment of the present disclosure, wherein the power head assembly includes two frame plates. One end of the upper parts of the two frame plates is movably hinged to the wing plate through a pin shaft. A sandwich cavity is formed between the two frame plates. A transmission chain is arranged in the sandwich cavity. The hydraulic motor is fixedly installed outside one of the frame plates. The cutting wheel is rotatably installed at the lower part of the frame plate. The hydraulic motor drives the cutting wheel to rotate through the transmission chain.

[0009] The milling excavator for a rotary drilling rig according to at least one embodiment of the present disclosure, wherein a positioning hole for inserting the drill pipe of the rotary drilling rig is provided in the middle of the base.

[0010] The milling excavator for a rotary drilling rig according to at least one embodiment of the present disclosure, wherein a plurality of distance-adjusting threaded holes on the positioning plate are uniformly arranged along the deflection path of the frame plate. Through holes are provided on the upper surface of the frame plate at the positions of the distance-adjusting threaded holes.

[0011] The milling excavator for a rotary drilling rig according to at least one embodiment of the present disclosure, wherein a plurality of bullet-shaped excavation heads are fixedly installed on the surface of the cutting wheel.

[0012] The milling excavator for a rotary drilling rig according to at least one embodiment of the present disclosure, wherein the hydraulic motor is connected to the hydraulic system of the rotary drilling rig through a hydraulic pipeline.

[0013] The technical effects and advantages of the present utility model:

[0014] Adjust the position of the bolts on the positioning plate as needed, so as to adjust the inclination angle of the two power head assemblies, change the distance between the cutting wheels of the two power head assemblies, and adapt to the drilling of pile holes of different sizes, so that it is not necessary to completely remove the power head assembly, improving work efficiency;

[0015] The hydraulic motor is connected to the hydraulic system of the rotary drilling rig through a hydraulic pipeline. The hydraulic motor drives the cutting wheel to rotate through the transmission chain. The required pile hole can be obtained by milling the prefabricated hole through the up and down movement of the drill rod of the milling excavator and the rotational movement of the cutting wheel. Since the hydraulic motor and the transmission chain are outside, it is convenient for disassembly and maintenance, and the service life is prolonged. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, are used to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are included in this specification and form a part of this specification.

[0017] Figure 1 is a schematic diagram of the overall structure of a milling excavator for a rotary drilling rig according to an embodiment of the present disclosure.

[0018] Figure 2It is a top view of a milling excavator for a rotary drilling rig according to an embodiment of the present disclosure.

[0019] Specifically, the reference numerals in the figure are as follows:

[0020] 1. Base; 11. Positioning hole; 12. Wing plate; 2. Power head assembly; 21. Frame plate; 22. Interlayer cavity; 3. Cutting wheel; 31. Excavating cutter head; 4. Transmission chain; 5. Hydraulic motor; 6. Positioning plate; 61. Distance adjustment threaded hole; 7. Pin shaft. Detailed implementation manners

[0021] For descriptive purposes, the present disclosure may use spatial relative terms such as "under", "below", "beneath", "lower", "above", "over", "upper", and "side (e.g., as in "side wall")" to describe the relationship between one component and another (other) component as shown in the drawings. In addition to the orientation depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as "under" or "beneath" another component or feature will then be positioned "above" the other component or feature. Thus, the exemplary term "under" can encompass both the "above" and "below" orientations. Additionally, the device can be positioned otherwise (e.g., rotated 90 degrees or at other orientations), and accordingly, the spatial relative descriptive terms used herein are to be interpreted accordingly.

[0022] As Figure 1-2 shown, a milling excavator for a rotary drilling rig in the present disclosure includes a base 1 connected to the rotary drilling rig, and further includes two power head assemblies 2. Wing plates 12 are fixedly installed on the front and rear sides of the lower part of the base 1. The two power head assemblies 2 are located between the two wing plates 12, and the two power head assemblies 2 are respectively movably hinged and installed at both ends of the wing plates 12. Cutting wheels 3 are rotatably installed on the front and rear sides of the lower end of the power head assembly 2. A hydraulic motor 5 for driving the cutting wheel 3 to rotate is installed on one side of the power head assembly 2. Two positioning plates 6 are fixedly installed on the outer sides of the wing plates 12. A plurality of distance adjustment threaded holes 61 are formed on the surfaces of the positioning plates 6. The positioning plates 6 are fixedly connected to the power head assemblies 2 at corresponding positions through bolts.

[0023] In this embodiment, the power head assembly 2 includes two frame plates 21. One ends of the upper parts of the two frame plates 21 are movably hinged to the wing plates 12 through a pin shaft 7. An interlayer cavity 22 is formed between the two frame plates 21. A transmission chain 4 is arranged in the interlayer cavity 22. The hydraulic motor 5 is fixedly installed on the outer side of one of the frame plates 21. The cutting wheel 3 is rotatably installed on the lower part of the frame plate 21. The hydraulic motor 5 drives the cutting wheel 3 to rotate through the transmission chain 4.

[0024] Further, for the convenience of connecting with the drill pipe of the rotary drilling rig, in this embodiment, a positioning hole 11 for inserting the drill pipe of the rotary drilling rig is provided in the middle of the base 1, and the cross-section of the positioning hole 11 is designed according to the cross-section of the drill pipe.

[0025] Further, in order to accurately adjust the inclination angle of the mounting plate 21, in this embodiment, a plurality of distance-adjusting threaded holes 61 on the positioning plate 6 are uniformly arranged along the deflection path of the mounting plate 21, and through holes are provided on the upper surface of the mounting plate 21 at the positions of the distance-adjusting threaded holes 61.

[0026] In this embodiment, a plurality of bullet-shaped excavation cutters 31 are fixedly installed on the surface of the cutting wheel 3. The excavation cutters 31 are made of high-strength wear-resistant alloy material and are used for milling the prefabricated holes.

[0027] In this embodiment, the hydraulic motor 5 is connected to the hydraulic system of the rotary drilling rig through a hydraulic pipeline, so that there is no need to add a new hydraulic system.

[0028] The specific operation steps are as follows: Adjust the positions of the bolts on the positioning plate 6 as needed, so as to adjust the inclination angles of the two power head assemblies 2, change the distance between the cutting wheels 3 of the two power head assemblies 2, and adapt to the drilling of pile holes of different sizes;

[0029] Fix the connection with the drill pipe of the rotary drilling rig through the positioning hole 11 on the base 1. The hydraulic motor 5 is connected to the hydraulic system of the rotary drilling rig through a hydraulic pipeline. The hydraulic motor 5 drives the cutting wheel 3 to rotate through the transmission chain 4. The required pile hole can be obtained by milling the prefabricated hole through the up and down movement of the drill pipe of the rotary drilling rig and the rotational movement of the cutting wheel 3.

[0030] In the description of this specification, the description with reference to terms such as "one embodiment / way", "some embodiments / ways", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment / way or example are included in at least one embodiment / way or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments / ways or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments / ways or examples described in this specification and the features of different embodiments / ways or examples.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present disclosure and are not intended to limit the scope of the present disclosure. For those skilled in the art, other changes or variations can be made based on the above disclosure, and these changes or variations are still within the scope of the present disclosure.

Claims

1. A milling machine for a rotary drilling rig, comprising a base connected to the rotary drilling rig, characterized in that: It also includes two power head assemblies, wherein wing plates are fixedly installed on the front and rear sides of the lower part of the base, the two power head assemblies are located between the two wing plates, and the two power head assemblies are movably hingedly installed at both ends of the wing plates, cutting wheels are rotatably installed on the front and rear sides of the lower end of the power head assembly, and a hydraulic motor for driving the cutting wheel to rotate is installed on one side of the power head assembly, and two positioning plates are fixedly installed on the outer side of the wing plates, and a plurality of distance-adjusting threaded holes are provided on the surface of the positioning plates, and the positioning plates are fixedly connected to the power head assemblies at corresponding positions by bolts.

2. The milling machine for rotary drilling rig according to claim 1, characterized in that: The power head assembly includes two frame plates, one end of the upper part of the two frame plates is movably hinged to the wing plate through a pin shaft, an interlayer cavity is formed between the two frame plates, a transmission chain is arranged in the interlayer cavity, the hydraulic motor is fixedly mounted on the outside of one of the frame plates, the cutting wheel is rotatably mounted on the lower part of the frame plates, and the hydraulic motor drives the cutting wheel to rotate through the transmission chain.

3. The milling machine for rotary drilling rig according to claim 1, characterized in that: A positioning hole for inserting a drill rod of a rotary drilling rig is provided in the middle of the base.

4. The milling machine for rotary drilling rig according to claim 1, characterized in that: The plurality of distance-adjusting threaded holes on the positioning plate are evenly arranged according to the deflection path of the frame plate, and through holes are provided on the upper surface of the frame plate at the positions of the distance-adjusting threaded holes.

5. The milling machine for rotary drilling rig according to claim 1, characterized in that: A plurality of bullet-shaped excavating cutting heads are fixedly mounted on the surface of the cutting wheel.

6. The milling machine for rotary drilling rig according to claim 1, characterized in that: The hydraulic motor is connected to the hydraulic system of the rotary drilling rig through a hydraulic pipeline.

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