CN117888807A - Multifunctional hole forming device - Google Patents

Abstract

The invention discloses a multifunctional hole forming device which comprises a mast assembly, wherein a sliding guide rail is arranged at the top of the mast assembly, a hoisting system is arranged at one side of the mast assembly, a steel wire rope is connected to the hoisting system, the steel wire rope penetrates through the sliding guide rail and is movably connected with a rotary drilling rod, a pressurizing system is arranged at the opposite side of the mast assembly to the hoisting system, a power head assembly is connected to the pressurizing system, the power head assembly is in transmission connection with the rotary drilling rod, and a rotary drilling bit is arranged at the bottom of the rotary drilling rod; the invention integrates the double functions of rotary digging and down-the-hole drilling by the power head assembly, not only can carry out the earth rotary digging hole forming operation, but also can carry out the rock down-the-hole drilling operation.

Description

A multifunctional hole forming device

Technical Field

The invention relates to the technical field of engineering machinery, in particular to a multifunctional hole-forming device.

Background technique

Currently, large-tonnage rotary drilling machinery on the market can perform rotary drilling and down-the-hole drilling in earthwork and rock conditions, while small-tonnage rotary drilling machinery can only perform hole-drilling operations in earthwork conditions.

In the prior art, the drilling equipment usually includes rotary drilling rigs, down-the-hole drills and pile drivers. Crawler-type rotary drilling rigs are common equipment in engineering machinery, and are used for drilling drilling operations in construction sites, road construction, subway construction and other working conditions. Down-the-hole drills are equipment used for drilling holes in rocks (loading explosives in the drilled holes) before engineering blasting, and are available in two types: internal combustion and electric. A pile driver consists of a pile hammer, a pile frame and auxiliary equipment. The pile hammer is attached between two parallel vertical guide rods (commonly known as gantry) at the front of the pile frame and is lifted by a lifting hook. The pile frame is a steel structure tower with a winch at the rear for lifting the pile and the pile hammer. There is a guide frame composed of two guide rods in front of the pile frame for controlling the direction of piling so that the pile can be accurately penetrated into the formation according to the designed orientation.

However, small-tonnage crawler rotary drilling rigs can only perform earthwork rotary drilling and cannot perform down-the-hole operations. The mast, drill rod, power head and other components need to be removed during transportation. Large-tonnage crawler rotary drilling rigs can perform both rotary drilling and down-the-hole operations. Down-the-hole drills are also special equipment. Although down-the-hole drills have the characteristics of deep drilling and large drilling diameter, they cannot perform rotary drilling operations. Pile drivers are construction machinery, generally used for foundation pile hole construction, and have unique requirements for working conditions.

Summary of the invention

In view of the shortcomings of the prior art, the present invention provides a multifunctional hole-making device, which aims to solve the difficult problem of hole-making operations on hillsides in mountainous areas, and to provide a machine suitable for rotary drilling and down-the-hole operations under earthwork and rock working conditions integrated with small-tonnage engineering machinery, which is easy to transport and does not require disassembly of the rotary drilling drill rod.

To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multifunctional hole-forming device, comprising a mast assembly, a sliding guide rail is provided on the top of the mast assembly, a winch system is provided on one side of the mast assembly, a steel wire rope is connected to the winch system, and the steel wire rope passes through the sliding guide rail and is movably connected to a rotary drilling rod, a pressurizing system is provided on the mast assembly, a power head assembly is connected to the pressurizing system, the power head assembly and the rotary drilling rod are transmission-connected, and a rotary drilling bit is provided at the bottom of the rotary drilling rod.

Furthermore, the winch system includes a winch seat, a first hydraulic motor, a winch, a fixed seat, a transmission bolt, a cavity and an opening; the winch seat is connected to one side of the mast assembly through the fixed seat, a cavity is provided inside the winch seat, an opening connected to the cavity is provided on the outer side of the winch seat, a transmission bolt rotatably connected to the cavity is provided in the cavity, a winch is fixedly connected to the transmission bolt, a steel wire rope is arranged around the winch, both ends of the transmission bolt are rotatably connected to the inner wall of the cavity through bearings, a first hydraulic motor is fixed to the outer side of the winch seat, and a transmission end of the first hydraulic motor passes through the side wall of the winch seat and is connected to the transmission bolt.

Furthermore, the pressurization system includes a driving mechanism and a sliding connecting plate, the driving mechanism is connected to the sliding connecting plate, the sliding connecting plate is slidingly connected to the mast assembly, the sliding connecting plate is connected to the power head assembly, and the sliding connecting plate moves along the length direction of the mast assembly under the action of the driving mechanism and drives the power head assembly to move along the length direction of the mast assembly.

Furthermore, the driving mechanism includes a connecting seat arranged at the top and bottom of the mast assembly, and movable shafts are arranged on the connecting seats at the top and bottom of the mast assembly. A first gear is fixed on the movable shaft at the top of the mast assembly, and a second gear is fixed on the connecting seat at the bottom of the mast assembly. The first gear and the second gear are connected by a chain transmission. Limit blocks are arranged on both sides of the side of the mast assembly opposite to the winch seat, and the sliding connecting plate is slidably connected to the limit blocks through limit clamps arranged on both sides. The inner side surface of the sliding connecting plate is connected to the chain, and the outer side surface of the sliding connecting plate is connected to the power head assembly. A second hydraulic motor is arranged on one side of the connecting seat at the top of the mast assembly, and the transmission end of the second hydraulic motor is connected to the first gear transmission.

Furthermore, the power head assembly includes a rotary drilling power head, a rotary drilling port, a rotary drilling transmission plate, a transmission rack, a connecting hole, a limit rack, a third hydraulic motor and a first reducer. The rotary drilling power head is provided with a rotary drilling port, and a rotary drilling transmission plate is movably connected to the inner wall of the rotary drilling port. The diameter of the rotary drilling transmission plate is larger than the rotary drilling port. A connecting hole is provided at the center of the rotary drilling transmission plate. The diameter of the connecting hole is smaller than the rotary drilling port. A plurality of vertically arranged transmission racks are equidistantly arranged in the connecting hole. Three vertically arranged limit racks are equidistantly arranged on the surface of the rotary drilling rod. The rotary drilling rod is movably connected to the connecting hole at the center of the rotary drilling transmission plate. The total length of the radius of the rotary drilling rod plus the thickness of the limit rack is greater than the total length of the radius of the connecting hole minus the thickness of the transmission rack, and the total length of the radius of the rotary drilling rod plus the thickness of the limit rack is less than the radius of the connecting hole. A third hydraulic motor is also provided on the rotary drilling power head, and the transmission end of the third hydraulic motor is connected to the first reducer, and the first reducer is connected to the rotary drilling transmission disc in transmission connection; a mounting plate is provided on the rotary drilling power head, and the rotary drilling power head is connected to the sliding connecting plate through the mounting plate; each limit rack is arranged between two adjacent transmission racks, and each limit rack and the transmission rack cooperate with each other to limit the rotation angle of the rotary drilling rod.

Furthermore, a plurality of equidistantly arranged protrusions are provided on both sides of the position-limiting rack, and arc-shaped chamfers are provided at the connection between the protrusions and the position-limiting rack.

Furthermore, the power head assembly also includes a down-the-hole power head, which is arranged on one side of the rotary drilling power head. The down-the-hole power head is provided with a down-the-hole opening, and a down-the-hole transmission disk is movably connected in the down-the-hole opening. The down-the-hole power head is provided with two fourth hydraulic motors, and the transmission end of the fourth hydraulic motor is connected to a second reducer, and the second reducer is transmission-connected to the down-the-hole transmission disk. A down-the-hole opening for installing a down-the-hole drill rod is provided at the bottom of the down-the-hole power head, and the down-the-hole drill rod and the down-the-hole transmission disk are detachably transmission-connected, and a pipeline for conveying compressed gas to the down-the-hole drill rod is provided at the top of the down-the-hole power head.

Furthermore, the top of the connecting seat is connected to the sliding guide rail.

Furthermore, the rotary drilling rod is a four-section machine-locking rod.

Furthermore, a lifting cylinder is provided on a side of the mast assembly away from the rotary drilling drill rod.

Compared with the existing technology, the present invention has the following beneficial effects:

(1) The present invention integrates the dual functions of rotary drilling and down-the-hole drilling through the power head assembly, and can perform both earthwork rotary drilling and rock down-the-hole drilling operations. The present invention adopts a four-section machine locking rod design for the rotary drilling drill rod, which does not need to be disassembled during transportation, thereby improving transportation efficiency and saving transportation costs.

(2) The present invention can apply pressure to the drill rod by combining the pressurized winch system with the pressurized system, thereby improving the work efficiency of rotary drilling or down-the-hole drilling.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of the present invention.

FIG. 2 is a schematic diagram of the structure of the hoisting system of the present invention.

FIG. 3 is a top view of the hoisting system of the present invention.

FIG. 4 is a schematic diagram of the structure of the pressurizing system of the present invention.

FIG. 5 is a top view of the pressurization system of the present invention.

FIG. 6 is a schematic diagram of the power head assembly structure of the present invention.

FIG. 7 is a schematic diagram of the surface structure of the rotary drilling rod of the present invention.

FIG8 is a schematic diagram of the structure of the installation work platform of the present invention.

In the figure: 1, mast assembly; 2, pressurizing system; 22, connecting seat; 23, first gear; 24, second gear; 25, chain; 26, sliding connecting plate; 27, movable shaft; 28, limit block; 29, limit clamp; 210, second hydraulic motor; 3, hoisting system; 31, hoisting seat; 32, first hydraulic motor; 33, hoisting; 34, fixed seat; 35, transmission bolt; 36, cavity; 37, opening; 4, power head assembly; 41, rotary drilling power head; 42, down-the-hole power head Power head; 43, rotary drilling opening; 44, rotary drilling transmission plate; 45, transmission rack; 46, connecting hole; 47, limit rack; 48, third hydraulic motor; 49, first reducer; 410, down-the-hole opening; 411, down-the-hole transmission plate; 412, fourth hydraulic motor; 413, second reducer; 414, mounting plate; 415, arc chamfer; 416, bump; 5, rotary drilling rod; 6, lifting cylinder; 7, rotary drilling bit; 9, wire rope; 10, sliding guide rail; 11, working platform.

Detailed ways

As shown in Figure 1, the present invention provides a technical solution: a multifunctional hole-forming device, including a mast assembly 1, a sliding guide rail 10 is provided on the top of the mast assembly 1, a winch system 3 is provided on one side of the mast assembly 1, a steel wire rope 9 is connected to the winch system 3, and the steel wire rope 9 passes through the sliding guide rail 10 and is movably connected to a rotary drilling rod 5, a pressurizing system 2 is provided on the mast assembly 1, a power head assembly 4 is connected to the pressurizing system 2, the power head assembly 4 and the rotary drilling rod 5 are transmission-connected, and a rotary drilling bit 7 is provided at the bottom of the rotary drilling rod 5.

As shown in FIGS. 2-3 , the winch system 3 includes a winch seat 31, a first hydraulic motor 32, a winch 33, a fixed seat 34, a transmission bolt 35, a cavity 36 and an opening 37; the winch seat 31 is connected to one side of the mast assembly 1 through the fixed seat 34, a cavity 36 is provided inside the winch seat 31, an opening 37 communicating with the cavity 36 is provided on the outer side of the winch seat 31, a transmission bolt 35 rotatably connected to the cavity 36 is provided in the cavity 36, a winch 33 is fixedly connected to the transmission bolt 35, a steel wire rope 9 is arranged around the winch 33, both ends of the transmission bolt 35 are rotatably connected to the inner wall of the cavity 36 through bearings, a first hydraulic motor 32 is fixed to the outer side of the winch seat 31, and a transmission end of the first hydraulic motor 32 passes through the side wall of the winch seat 31 and is connected to the transmission bolt 35;

The working process of the winch system 3 is as follows: the first hydraulic motor 32 drives the winch 33 to rotate under the restriction of the bearing through the transmission bolt 35, and the rotation of the winch 33 tightens or loosens the wire rope 9, thereby lifting and lowering the rotary drilling rod 5.

As shown in Figures 4 and 5, the pressurizing system 2 includes a driving mechanism and a sliding connecting plate 26. The driving mechanism is connected to the sliding connecting plate 26. The sliding connecting plate 26 is slidingly connected to the mast assembly 1. The sliding connecting plate 26 is connected to the power head assembly 4. The sliding connecting plate 26 moves along the length direction of the mast assembly 1 under the action of the driving mechanism, and drives the power head assembly 4 to move along the length direction of the mast assembly 1.

The driving mechanism includes a connecting seat 22 arranged at the top and bottom of the mast assembly 1, and movable shafts 27 are arranged on the connecting seats at the top and bottom of the mast assembly 1. A first gear 23 is fixed on the movable shaft 27 at the top of the mast assembly 1, and a second gear 24 is fixed on the connecting seat at the bottom of the mast assembly 1. The first gear 23 and the second gear 24 are connected by a chain 25. Limit blocks 28 are arranged on both sides of the side opposite to the winch seat 31 of the mast assembly 1. The sliding connecting plate 26 is slidably connected to the limit blocks 28 through limit card plates 29 arranged on both sides. The inner side surface of the sliding connecting plate 26 is connected to the chain 25, and the outer side surface of the sliding connecting plate 26 is connected to the power head assembly 4. A second hydraulic motor 210 is arranged on one side of the connecting seat 22 at the top of the mast assembly 1, and the transmission end of the second hydraulic motor 210 is connected to the first gear 23 by transmission; the top of the connecting seat 22 is connected to the sliding guide rail 10.

The working process of the pressurizing system 2 is as follows: when in use, the second hydraulic motor 210 drives the first gear 23 to rotate under the restriction of the movable shaft 27, and the first gear 23 drives the second gear 24 to rotate through the chain 25, so that the chain 25 drives the sliding connecting plate 26 to move downward under the restriction of the limit block 28 and the limit clamp 29, thereby applying pressure to the power head assembly 4 connected to the sliding connecting plate 26.

As shown in Figure 6, the power head assembly 4 includes a rotary drilling power head 41, a rotary drilling port 43, a rotary drilling transmission disk 44, a transmission rack 45, a connecting hole 46, a limit rack 47, a third hydraulic motor 48 and a first reducer 49. The rotary drilling power head 41 is provided with a rotary drilling port 43, and a rotary drilling transmission disk 44 is movably connected to the inner wall of the rotary drilling port 43. The diameter of the rotary drilling transmission disk 44 is larger than the rotary drilling port 43. A connecting hole 46 is provided at the center of the rotary drilling transmission disk 44. The diameter of the connecting hole 46 is smaller than the rotary drilling port 43. Three vertically arranged transmission racks 45 are equidistantly arranged in the connecting hole 46. Three vertically arranged limit racks 47 are equidistantly arranged on the surface of the rotary drilling rod 5. The rotary drilling rod 5 is movably connected to the connecting hole 46 at the center of the rotary drilling transmission disk 44. The total length of the radius of the rotary drilling rod 5 plus the thickness of the limit rack 47 is greater than the total length of the radius of the connecting hole 46 minus the thickness of the transmission rack 45. The total length of the radius of the rotary drilling rod 5 plus the thickness of the limit rack 47 is less than the radius of the connecting hole 46. A third hydraulic motor 48 is also provided on the rotary drilling power head 41. The transmission end of the third hydraulic motor 48 is connected to the first reducer 49. The first reducer 49 is connected to the rotary drilling transmission disc 44 in transmission connection. A mounting plate 414 is provided on the rotary drilling power head 41. The rotary drilling power head 41 is connected to the sliding connecting plate 26 through the mounting plate 414. Each limit rack 47 is arranged between two adjacent transmission racks 45. Each limit rack 47 and the transmission rack 45 cooperate with each other to limit the rotation angle of the rotary drilling rod 5.

Working principle of the rotary drilling power head 41: When in use, the third hydraulic motor 48 drives the rotary drilling drive plate 44 through the first reducer 49, and the rotary drilling drive plate 44 drives the transmission rack 45 in the connecting hole 46 to move around, and the transmission rack 45 applies pressure to the limit rack 47 on the rotary drilling rod 5, so that the rotary drilling rod 5 rotates;

As shown in FIG7 , a plurality of equidistantly arranged protrusions 416 are provided on both sides of the limit rack 47, and an arc chamfer 415 is provided at the connection between the protrusion 416 and the limit rack 47; through the multiple protrusions 416, when the transmission rack 45 applies pressure to the limit rack 47, the transmission rack 45 and the limit rack 47 will fit together, and the protrusions 416 prevent the rotary drilling rod 5 from being ejected when pressurized by the pressurizing system 2, and when the rotary drilling rod 5 drives the rotary drilling bit 7 to work and collides with a hard object, the arc chamfer 415 can separate the transmission rack 45 and the limit rack 47 to avoid damage to the rotary drilling bit 7;

The power head assembly 4 also includes a down-the-hole power head 42, which is arranged on one side of the rotary drilling power head 41, and is provided with a down-the-hole opening 410, in which a down-the-hole transmission disc 411 is movably connected, and two fourth hydraulic motors 412 are provided on the down-the-hole power head 42, and the transmission end of the fourth hydraulic motor 412 is connected to a second reducer 413, and the second reducer 413 is in transmission connection with the down-the-hole transmission disc 411, and a down-the-hole opening for installing a down-the-hole drill rod is provided at the bottom of the down-the-hole power head 42, and the down-the-hole drill rod and the down-the-hole transmission disc 411 are detachably connected in transmission, and a pipeline for conveying compressed gas to the down-the-hole drill rod is provided at the top of the down-the-hole power head 42;

Working principle of the down-the-hole power head 42: When in use, the two fourth hydraulic motors 412 drive the down-the-hole transmission disc 411 to rotate through the second reducer 413, and the down-the-hole transmission disc 411 drives the down-the-hole drill rod to operate. At the same time, the pipeline on the top of the down-the-hole power head 42 transports compressed gas to the down-the-hole drill rod for operation.

The rotary drilling rod 5 is a four-section machine lock rod, so that the rotary drilling rod 5 can be lengthened according to different working conditions to increase the depth of the hole forming operation;

As shown in FIG8 , a lifting cylinder 6 is provided on a surface of the mast assembly 1 away from the rotary drilling rod 5 , and the mast assembly 1 can be connected to different working platforms 11 for use through the lifting cylinder 6 .

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. The utility model provides a multi-functional pore-forming device, includes mast assembly 1, its characterized in that: the top of the mast assembly 1 is provided with a sliding guide rail 10, one side of the mast assembly 1 is provided with a hoisting system 3, the hoisting system 3 is connected with a steel wire rope 9, the steel wire rope 9 penetrates through the sliding guide rail 10 to be movably connected with a rotary drilling rod 5, the mast assembly 1 is provided with a pressurizing system 2, the pressurizing system 2 is connected with a power head assembly 4, the power head assembly 4 is in transmission connection with the rotary drilling rod 5, and the bottom of the rotary drilling rod 5 is provided with a rotary drilling bit 7.

2. A multi-purpose hole forming apparatus as claimed in claim 1, wherein: the hoisting system 3 comprises a hoisting seat 31, the hoisting seat 31 is connected to one side of the mast assembly 1 through a fixed seat 34, a cavity 36 is formed in the hoisting seat 31, an opening 37 communicated with the cavity 36 is formed in the outer side face of the hoisting seat 31, a transmission bolt 35 rotationally connected with the cavity 36 is arranged in the cavity 36, a hoisting 33 is fixedly connected to the transmission bolt 35, a steel wire rope 9 is circumferentially arranged on the hoisting 33, two ends of the transmission bolt 35 are rotationally connected with the inner wall of the cavity 36 through bearings, a first hydraulic motor 32 is fixed to the outer side face of the hoisting seat 31, and a transmission end of the first hydraulic motor 32 penetrates through the side wall of the hoisting seat 31 and is connected with the transmission bolt 35.

3. A multi-functional hole forming apparatus according to claim 2, wherein: the pressurizing system 2 comprises a driving mechanism and a sliding connection plate 26, wherein the driving mechanism is connected with the sliding connection plate 26, the sliding connection plate 26 is in sliding connection with the mast assembly 1, the sliding connection plate 26 is connected with the power head assembly 4, the sliding connection plate 26 moves along the length direction of the mast assembly 1 under the action of the driving mechanism, and the power head assembly 4 is driven to move along the length direction of the mast assembly 1.

4. A multi-functional well-forming device according to claim 3, wherein: the driving mechanism comprises connecting seats 22 arranged at the top and the bottom of the mast assembly 1, movable shafts 27 are arranged on the connecting seats at the top and the bottom of the mast assembly 1, a first gear 23 is fixed on the movable shaft 27 at the top of the mast assembly 1, a second gear 24 is fixed on the connecting seat at the bottom of the mast assembly 1, the first gear 23 and the second gear 24 are in transmission connection through a chain 25, limiting blocks 28 are arranged on two sides of the opposite surface of the mast assembly 1 to a hoisting seat 31, a sliding connection plate 26 is in sliding connection with the limiting blocks 28 through limiting clamping plates 29 arranged on two sides, the inner side surface of the sliding connection plate 26 is connected with the chain 25, the outer side surface of the sliding connection plate 26 is connected with the power head assembly 4, a second hydraulic motor 210 is arranged on one side of the connecting seat 22 at the top of the mast assembly 1, and the transmission end of the second hydraulic motor 210 is in transmission connection with the first gear 23.

5. The multi-purpose hole forming apparatus according to claim 4, wherein: the power head assembly 4 comprises a rotary digging power head 41, a rotary digging hole 43 is formed in the rotary digging power head 41, a rotary digging transmission disc 44 is movably connected to the inner wall of the rotary digging hole 43, the diameter of the rotary digging transmission disc 44 is larger than that of the rotary digging hole 43, a connecting hole 46 is formed in the center of the rotary digging transmission disc 44, the diameter of the connecting hole 46 is smaller than that of the rotary digging hole 43, a plurality of vertically arranged transmission racks 45 are equidistantly and circumferentially arranged in the connecting hole 46, three vertically arranged limit racks 47 are equidistantly and circumferentially arranged on the surface of a rotary digging drill rod 5, the rotary digging drill rod 5 is movably connected in the connecting hole 46 in the center of the rotary digging transmission disc 44, a third hydraulic motor 48 is further arranged on the rotary digging power head 41, and the transmission end of the third hydraulic motor 48 is connected with a first speed reducer 49, and the first speed reducer 49 is in transmission connection with the rotary digging transmission disc 44; the rotary digging power head 41 is provided with a mounting plate 414, and the rotary digging power head 41 is connected with the sliding connecting plate 26 through the mounting plate 414; each of the limiting racks 47 is disposed between two adjacent driving racks 45, and each of the limiting racks 47 and the driving racks 45 cooperate with each other to limit the rotation angle of the rotary drilling rod 5.

6. The multi-purpose hole forming apparatus according to claim 5, wherein: the total length of the radius of the rotary drilling rod 5 plus the thickness of the limiting rack 47 is larger than the total length of the radius of the connecting hole 46 minus the thickness of the transmission rack 45, and the total length of the radius of the rotary drilling rod 5 plus the thickness of the limiting rack 47 is smaller than the radius of the connecting hole 46.

7. The multi-purpose hole forming apparatus according to claim 6, wherein: a plurality of convex blocks 416 are arranged on two sides of the limiting rack 47 at equal intervals, and arc-shaped chamfer angles 415 are arranged at the connecting positions of the convex blocks 416 and the limiting rack 47.

8. The multi-purpose hole forming apparatus as claimed in claim 7, wherein: the power head assembly 4 further comprises a down-hole power head 42, the down-hole power head 42 is arranged on one side of the rotary drilling power head 41, a down-hole 410 is arranged on the down-hole power head 42, a down-hole transmission disc 411 is movably connected in the down-hole 410, two fourth hydraulic motors 412 are arranged on the down-hole power head 42, the transmission end of each fourth hydraulic motor 412 is connected with a second speed reducer 413, the second speed reducers 413 are in transmission connection with the down-hole transmission disc 411, a down-hole opening for installing a down-hole drill rod is arranged at the bottom of the down-hole power head 42, the down-hole drill rod is detachably in transmission connection with the down-hole transmission disc 411, and a pipeline for conveying compressed gas to the down-hole drill rod is arranged at the top of the down-hole power head 42.

9. A multi-functional hole forming apparatus according to claim 2, wherein: the top of the connecting seat 22 is connected with the sliding guide rail 10.

10. The multi-purpose hole forming apparatus as claimed in claim 8, wherein: the rotary drilling rod 5 is a four-section machine lock rod; and a lifting oil cylinder 6 is arranged on one surface of the mast assembly 1, which is far away from the rotary drilling rod 5.