WO2018090689A1

WO2018090689A1 - Multifunctional anchor cable drilling machine

Info

Publication number: WO2018090689A1
Application number: PCT/CN2017/098891
Authority: WO
Inventors: 李国建; 李友华; 吴海涛; 曹中升; 齐界夷; 黄家权; 詹剑霞; 王士发; 李乐乐; 汪文亮; 李哲朋
Original assignee: 中国葛洲坝集团三峡建设工程有限公司
Priority date: 2016-11-18
Filing date: 2017-08-24
Publication date: 2018-05-24
Also published as: CN106401475A; CN106401475B

Abstract

Disclosed is a multifunctional anchor cable drilling machine, comprising a chassis (3), a main boom (1), which is capable of pitching and telescoping, being provided on the chassis (3), a drilling machine (101) being provided on the distal end of the main boom (1); an auxiliary boom (2), which is capable of pitching and telescoping, is provided on one side of the main boom (1), and an operating platform (25) being provided on the distal end of the auxiliary boom (2). A fixed boom (22) of the auxiliary boom is hinged, at the bottom thereof, by means of a pin, to an auxiliary boom base (33) that is fixedly provided on the chassis (3); a movable boom (23) of the auxiliary boom is movably sleeved within the fixed boom (22) of the auxiliary boom, and an auxiliary boom telescoping hydraulic cylinder (21) being provided between the bottom end of the movable boom (23) of the auxiliary boom and the bottom of the cavity of the fixed boom (22) of the auxiliary boom; the fixed boom (22) of the auxiliary boom is hinged to one end of an auxiliary boom pitching hydraulic cylinder (26), and the other end of the auxiliary boom pitching hydraulic cylinder (26) is hinged to the chassis (3); the free end of the movable boom (23) of the auxiliary boom is hinged to the operating platform (25), and a leveling hydraulic cylinder (24) is further provided. By means of the provided structure of a main boom (1) and an auxiliary boom (2), drill rods can be easily mounted on/detached from an operating platform, facilitating close control of the drilling quality, and further facilitating the operation of multi-step processes, such as drilling, anchorage cable application, mortar injection and anchorage cable stretching of an anchorage cable construction.

Description

Multifunctional anchor rig

Technical field

The invention relates to the field of drilling rigs, in particular to a multifunctional anchor rig.

Background technique

During the excavation of large underground caverns and engineering slopes, prestressed anchor cables are usually arranged on the high side walls, arches and slopes for rock reinforcement. Anchor cable construction usually adopts the erection frame as the operation platform, and the construction of drilling, cable entry, grouting and tensioning is completed on the operation platform. This construction method requires a large working surface due to the need to occupy the working surface. Affects problems such as straight-line construction period, large construction disturbance, low work efficiency and high safety risks.

Chinese patent document CN101832103A discloses a movable two-arm top anchor anchor cable construction drilling rig, which has a relatively complicated structure and is mainly used in coal mining. The structure of the drill arm is a bottom rotary structure, which is poorly stressed during the drilling process and affects the construction efficiency. Especially for the hard rock excavation process is less efficient. If the drill pipe needs to be loaded and unloaded during the excavation process, the existing drilling rig needs to be set up as an operation platform, the construction efficiency is low, and the drilling quality is also difficult to guarantee. Moreover, there are many processes such as cable entry, grouting and tensioning in the construction of prestressed anchor cables, and the existing frame construction method is labor intensive.

Summary of the invention

The technical problem to be solved by the present invention is to provide a multi-functional anchor cable drilling machine, which can conveniently load and unload a drill pipe, and facilitates the construction of multiple processes such as cable entry, grouting and tensioning, and the drill arm is well stressed. In a preferred solution, the safety of the constructor can be reliably ensured.

In order to solve the above technical problem, the technical solution adopted by the present invention is: a multifunctional anchor cable drilling machine, comprising a frame, a traveling device is arranged at the bottom of the frame, and a main arm capable of tilting and telescopic is provided on the frame, and the main arm is a drilling rig at the top;

A auxiliary arm capable of tilting and telescopic is provided on one side of the main arm, and an operation platform is provided at the top end of the auxiliary arm.

In a preferred solution, a hydraulic control room and a motor are provided on the frame, and frame hydraulic legs are provided at four corners of the frame.

In a preferred embodiment, in the main arm, the bottom of the main arm fixing arm is hinged to the main arm seat fixed to the frame through the pin shaft;

The main arm movable arm is sleeved in the main arm fixed arm, and a main arm telescopic hydraulic cylinder is disposed between the bottom end of the main arm movable arm and the bottom of the inner arm fixed arm in the main arm fixed arm;

The main arm fixed arm is hinged to one end of the main arm pitching hydraulic cylinder, and the other end of the main arm pitching hydraulic cylinder is hinged to the frame;

The top end of the movable arm of the main arm is hinged with the rotating device, the top of the rotating device is fixed with a drill arm, and the drilling machine is mounted on the drill arm; One end of the rig pitch hydraulic cylinder is hinged to the main arm movable arm, and the other end of the rig pitch hydraulic cylinder is hinged to the swing device.

In a preferred solution, in the drill arm, the sliding drill base is movably connected to the fixed drill arm and can slide along the fixed drill arm, the drill is fixedly connected with the sliding drill base, and the drill pipe is fixed on the fixed drill arm. guide;

The slewing device is fixedly coupled to one end of the drilling hydraulic cylinder, and the other end of the drilling hydraulic cylinder is coupled to the sliding rig base.

In a preferred embodiment, in the rotating device, the bottom of the rotary worm gear housing is fixed with a rotary support, the rotary support is hinged with the movable arm of the main arm, and the rotary worm wheel is rotatably mounted in the rotary worm gear housing, and the rotary worm gear is The end surface is fixedly connected with the fixed drill arm, the rotary worm housing is fixedly connected with the rotary worm gear housing, the rotary worm is rotatably mounted in the rotary worm housing, the rotary worm is meshed with the rotary worm wheel, and the rotary hydraulic motor is fixedly connected with the rotary worm.

In a preferred embodiment, the drill arm positioning teeth are provided at one end of the fixed drill arm adjacent to the drill rail.

In a preferred solution, in the auxiliary arm, the bottom of the auxiliary arm fixing arm is hinged to the auxiliary arm seat fixed to the frame through the pin shaft;

The auxiliary arm movable arm is sleeved in the auxiliary arm fixed arm, and an auxiliary arm telescopic hydraulic cylinder is arranged in the auxiliary arm fixed arm between the bottom end of the auxiliary arm movable arm and the bottom surface of the auxiliary arm fixed arm;

The auxiliary arm fixing arm is hinged to one end of the auxiliary arm pitching hydraulic cylinder, and the other end of the auxiliary arm pitching hydraulic cylinder is hinged to the frame;

The free end of the auxiliary arm movable arm is hinged with the operating platform, and the auxiliary arm movable arm is also hinged with one end of the leveling hydraulic cylinder, and the other end of the leveling hydraulic cylinder is hinged with the operating platform.

In a preferred solution, an auxiliary arm cushioning guard is provided on the frame below the auxiliary arm.

In a preferred solution, in the auxiliary arm buffer protection device, the buffer piston sealing activity is installed in the inner cavity of the buffer cylinder, the top of the buffer piston is provided with a bracket, and the outer periphery of the buffer cylinder is provided with a buffer cylinder outer cavity, and the buffer is buffered. The position of the inner cavity of the cylinder and the outer cavity of the buffer cylinder is communicated at the bottom portion through at least one oil passage hole, and a buffer spring is disposed between the buffer piston and the bottom of the inner cavity of the buffer cylinder.

In a preferred solution, an ultrasonic distance sensor is provided on the operating platform.

The invention provides a multifunctional anchor cable drilling machine, which can facilitate the loading and unloading of the drill pipe by the installation of the main arm and the auxiliary arm structure, and is convenient for controlling the drilling quality at a short distance, and is also convenient for subsequent auxiliary drilling and entry. The operation of multiple constructions of anchor cable, such as cable, grouting and tensioning, overcomes the problems of installing auxiliary equipment such as trusses during construction work in the prior art, and overcomes the problems of large interference, low work efficiency and high safety risk. problem. Moreover, the main arm and the auxiliary arm of the invention adopt the telescopic structure, and the main arm also adopts the structure of the revolving device, thereby effectively improving the working radius and improving the construction efficiency. The auxiliary arm cushion guard device can provide auxiliary buffer for the auxiliary arm when the hydraulic oil is out of pressure, ensuring the safety of the construction personnel. The arrangement structure of the main arm and the drilling machine of the invention is reasonable, the force is reliable, and the drilling quality is further improved.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

Figure 1 is a schematic front view of the structure of the present invention.

2 is a schematic front view showing the auxiliary arm of the present invention.

Fig. 3 is a front view showing the structure of the main arm of the present invention.

4 is a schematic structural view of a main arm seat and an auxiliary arm seat in the present invention.

Figure 5 is a schematic view showing the structure of the auxiliary arm cushioning protection device of the present invention.

Figure 6 is a schematic plan view showing the structure of the rotary device of the present invention.

In the figure: main arm 1, drill rig 101, drill pipe joint 1011, slewing device 102, rotary support 1021, rotary hydraulic motor 1022, rotary worm housing 1023, rotary worm 1024, rotary worm gear housing 1025, rotary worm gear 1026, drilling rig Pitch hydraulic cylinder 103, drill arm 104, fixed drill arm 1041, sliding drill base 1042, drill arm positioning tooth 1043, drill pipe guide 105, main arm movable arm 106, main arm telescopic hydraulic cylinder 107, main arm fixed arm 108, main Arm pitch hydraulic cylinder 109, drilling hydraulic cylinder 110, auxiliary arm 2, auxiliary arm telescopic hydraulic cylinder 21, auxiliary arm fixed arm 22, auxiliary arm movable arm 23, leveling hydraulic cylinder 24, operating platform 25, auxiliary arm pitch hydraulic cylinder 26, auxiliary arm cushion guard 27, bracket 271, cushion piston 272, buffer cylinder lumen 273, buffer cylinder outer chamber 274, buffer spring 275, oil hole 276, frame 3, frame hydraulic leg 31, main Arm seat 32, auxiliary arm seat 33, hydraulic control room 4, motor 5, track walking assembly 6.

detailed description

1 to 4, a multifunctional anchor cable drilling machine includes a frame 3, and a traveling device is arranged at the bottom of the frame 3, the walking device includes a tire walking device and a crawler walking assembly 6, and a crawler walking assembly It consists of left and right crawlers, each track comprising a travel motor, a drive wheel, a guide wheel, a track hydraulic adjuster, a plurality of support wheels, a support wheel, a track shoe assembly and a track frame. The crawler walking assembly 6 is preferably employed in this example.

The frame 3 is provided with a main arm 1 capable of tilting and telescopic, and the top end of the main arm 1 is provided with a drilling machine 101;

An auxiliary arm 2 capable of pitching and contracting is provided on one side of the main arm 1, and an operation platform 25 is provided at the top end of the auxiliary arm 2. With this configuration, the operating platform 25 on the auxiliary arm 2 facilitates the construction personnel to cooperate with the drilling machine 101 for construction work.

A preferred embodiment is shown in FIG. 1. A hydraulic control room 4 and a motor 5 are provided on the frame 3, and frame hydraulic legs 31 are provided at four corners of the frame 3. The hydraulic control room 4 is used to operate the main arm 1, the auxiliary arm 2, and the rig 101, and the motor 5 is used to drive the hydraulic pump. In the absence of electricity, a generator is also provided for powering the motor 5. The frame hydraulic leg 31 is provided to temporarily fix the frame 3.

In a preferred embodiment, in the main arm 1, the bottom of the main arm fixing arm 108 is hinged to the main arm seat 32 fixed to the frame 3 through a pin;

The main arm movable arm 106 is slidably engaged in the main arm fixed arm 108, and in the main arm fixed arm 108, the bottom of the main arm movable arm 106 a main arm telescopic hydraulic cylinder 107 is disposed between the end and the bottom of the inner cavity of the main arm fixing arm 108;

The main arm fixed arm 108 is hinged to one end of the main arm pitch hydraulic cylinder 109, and the other end of the main arm pitch hydraulic cylinder 109 is hinged to the frame 3.

The top end of the main boom movable arm 106 is hinged to the swing device 102, the top of the swing device 102 is fixed with a drill arm 104, and the drill 101 is mounted on the drill arm 104;

One end of the rig pitch hydraulic cylinder 103 is hinged to the main boom movable arm 106, and the other end of the rig pitch hydraulic cylinder 103 is hinged to the swing device 102. The combination of the main boom pitch cylinder 109 and the rig pitch hydraulic cylinder 103 can adjust the inclination of the main arm 1 and maintain the rig arm 104 in its original state, for example, maintaining a level, or a 5 degree inclination. The main boom telescopic hydraulic cylinder 107 is provided to adjust the working radius of the drilling machine 101. In this example, the telescopic stroke of the main boom telescopic hydraulic cylinder 107 is 3 to 3.5 meters. The drill rig 101 is provided with a drill pipe joint 1011 for connecting the drill pipe, and in this example, a drill pipe joint 1011 of a through hole structure is adopted. The rig 101 is connected to compressed air and hydraulic oil, wherein the hydraulic oil drives the drill rod to rotate by a hydraulic motor, and the compressed air provides a reciprocating impact force to the drill rod.

Preferably, as shown in FIG. 3, in the drill arm 104, the sliding drill base 1042 is movably connected with the fixed drill arm 1041 and can slide along the fixed drill arm 1041, and the drill 101 is fixedly connected with the sliding drill base 1042. a drill pipe guide 105 is further fixed on the drill arm 1041;

The swinging device 102 is fixedly coupled to one end of the drilling hydraulic cylinder 110, and the other end of the drilling hydraulic cylinder 110 is coupled to the sliding drill base 1042. The radius of rotation of the turning device 102 is from 0 to 360 degrees, which further increases the working radius of the drilling machine 101.

Preferably, as shown in FIG. 5, in the swing device 102, the bottom of the rotary worm gear housing 1025 is fixed with a rotary support 1021, and the rotary support 1021 is hinged with the main boom movable arm 106, and the rotary worm gear 1026 is rotatably mounted. In the rotary worm gear housing 1025, the end surface of the rotary worm wheel 1026 is fixedly connected to the fixed drill arm 1041, the rotary worm housing 1023 is fixedly connected to the rotary worm gear housing 1025, and the rotary worm 1024 is rotatably mounted in the rotary worm housing 1023. The rotary worm 1024 is meshed with the rotary worm gear 1026, and the rotary hydraulic motor 1022 is fixedly coupled to the rotary worm 1024. With this configuration, the drill arm 1041 is provided with the greatest degree of rotational freedom and is reliably stressed.

In this example, the drill rail 105 is located on the drill arm 104 adjacent the drill rail 105, and the drill 101 is located on the drill arm 104 away from the swivel 102. With this configuration, it is advantageous to maintain the balance of the drill arm 104 when the drill pipe is installed.

Preferably, as shown in FIG. 3, a drill arm positioning tooth 1043 is provided at an end of the fixed drill arm 1041 near the drill rod guide 105. The rig arm positioning tooth 1043 can be embedded in the rock wall when the rig is working to prevent the rig from slipping during the drilling process and ensure the drilling accuracy.

Preferably, as shown in FIG. 2, in the auxiliary arm 2, the bottom of the auxiliary arm fixing arm 22 is fixed to the vehicle through the pin shaft. The auxiliary arm seat 33 of the frame 3 is hinged;

The auxiliary arm movable arm 23 is slidably engaged in the auxiliary arm fixing arm 22, and in the auxiliary arm fixing arm 22, an auxiliary arm telescopic hydraulic pressure is provided between the bottom end of the auxiliary arm movable arm 23 and the bottom of the inner cavity of the auxiliary arm fixing arm 22. Cylinder 21;

The auxiliary arm fixing arm 22 is hinged to one end of the auxiliary arm pitching hydraulic cylinder 26, and the other end of the auxiliary arm pitching hydraulic cylinder 26 is hinged to the frame 3;

The free end of the auxiliary arm movable arm 23 is hinged to the operating platform 25, and the auxiliary arm movable arm 23 is also hinged to one end of the leveling hydraulic cylinder 24, and the other end of the leveling hydraulic cylinder 24 is hinged to the operating platform 25. With this structure, the lifting and leveling of the operating platform 25 is realized, which is convenient for the operator to perform auxiliary operations. For example, loading and unloading drill pipe, cable entry, grouting and tensioning.

A preferred embodiment is shown in FIG. 2, in which the auxiliary arm cushion guard 27 is provided on the frame 3 below the auxiliary arm 2. With this structure, it is ensured that the impact force of the auxiliary arm 2 is buffered when the hydraulic oil is out of pressure, and the safety of the construction personnel is ensured.

Preferably, as shown in FIG. 5, in the auxiliary arm buffer guard 27, the buffer piston 272 is movably mounted in the buffer cylinder lumen 273, and the top of the buffer piston 272 is provided with a bracket 271 for buffering the cylinder lumen 273. The outer periphery is provided with a buffer cylinder outer chamber 274. The buffer cylinder inner chamber 273 and the buffer cylinder outer chamber 274 are communicated at the bottom portion through at least one oil passage hole 276, and a buffer spring is disposed between the buffer piston 272 and the bottom of the buffer cylinder inner chamber 273. 275. With this structure, when the impact is received, the hydraulic oil of the buffer cylinder cavity 273 enters the outer cavity 274 of the buffer cylinder through the oil hole 276 to generate resistance, that is, the oil passage hole 276 is a damping hole, thereby achieving buffering and buffering. The spring 275 achieves double cushioning. Further preferably, the top of the buffer cylinder outer chamber 274 is a sealed structure in which air is stored. When the hydraulic oil enters the outer chamber 274 of the buffer cylinder, the air in the memory is compressed to achieve triple buffering.

In a preferred solution, an ultrasonic distance sensor is provided on the operating platform 25. With this structure, it is possible to avoid being too close to the rock wall or the main arm 1 to ensure construction safety.

The steps for drilling are as follows:

1. The anchor cable drilling machine of the present invention is driven to the construction site of the anchor cable, and the control rod in the hydraulic control room is operated to support the hydraulic leg 31 of the frame to the ground, and then the main arm is extended and the rig body is adjusted initially. Align the anchor hole position;

2. Operate the control rod in the hydraulic control room so that the auxiliary arm carrying the operator is close to the rig installed at the top of the main arm. The operator checks the azimuth and inclination of the drill pipe with a measuring tool such as an angle ruler and a compass, and guides the adjustment of the rig body. Until the drill pipe meets the drilling azimuth and inclination requirements;

3. After the quality inspection personnel check the drilling parameters again, the crew will check the rig's fuselage and stabilize the drilling machine to start drilling.

4. After drilling the rig, operate the drilling hydraulic cylinder 110 so that the drill bit of the drill pipe slowly approaches the rock wall, and slowly push the hole to start drilling. After drilling 50cm～100cm, check the azimuth and inclination of the drilling hole again. Continue drilling, otherwise it should be done immediately Adjustment;

5. Adjust the propulsion pressure in real time according to the return rock condition during the drilling process. When drilling about 5m, check the azimuth and dip angle of the borehole again. The deviation can continue to drill within the allowable range. Otherwise, corrective measures should be taken before drilling.

6. During the subsequent drilling process, the azimuth and dip angle of the drilling should be reviewed every 10m until the designed hole depth is reached;

7. After the design hole depth is reached, the drill pipe operation is exited, and the operator assists the drill pipe to exit in the auxiliary arm operation platform, and the drill pipe is slowly rotated and slowly exited by operating the control rod in the hydraulic control room, each exiting a drill The rod is controlled to reverse the drill rod, and the drill rod is disassembled by a special unloading drill rod wrench and placed in the operating platform until all exits.

Subsequent in-line, grouting and tensioning operations are performed on the operating platform 25 of the auxiliary arm 2, reducing the cost of erecting the rack.

The drill pipe guide 105 on the drill arm 104 is replaced with an anchor cable locking device, and the drilling rig 101 is used to operate the drilling hydraulic cylinder 110, and the anchor cable locking device and the drill pipe joint 1011 of the drilling machine are alternately locked, so that the drilling can be conveniently carried out. The cable process reduces equipment investment.

The above-described embodiments are only preferred embodiments of the present invention, and should not be construed as limiting the present invention. The features in the embodiments and the embodiments of the present application may be arbitrarily combined with each other without conflict. The scope of protection of the present invention should be construed as the scope of the invention, and the equivalents of the technical features of the technical solutions described in the claims. That is, equivalent replacement improvements within this range are also within the scope of the present invention.

Claims

A multifunctional anchor cable drilling machine comprises a frame (3), and a bottom of the frame (3) is provided with a walking device, characterized in that: the frame (3) is provided with a main arm (1) capable of tilting and telescopic, the main arm The top of (1) is provided with a drilling machine (101);

On one side of the main arm (1), there is a auxiliary arm (2) capable of tilting and telescopic, and the top end of the auxiliary arm (2) is provided with an operating platform (25).
A multifunctional anchor rig according to claim 1, wherein a hydraulic control room (4) and a motor (5) are provided on the frame (3), and are provided at four corners of the frame (3). Frame hydraulic legs (31).
A multi-functional anchor rig according to claim 1, wherein in the main arm (1), the bottom of the main arm fixing arm (108) is fixed to the frame by the pin (3) The main arm seat (32) is hinged;

The main arm movable arm (106) is slidably engaged in the main arm fixed arm (108), in the main arm fixed arm (108), the bottom end of the main arm movable arm (106) and the main arm fixed arm (108) A main arm telescopic hydraulic cylinder (107) is arranged between the bottoms of the chambers;

The main arm fixed arm (108) is hinged to one end of the main arm pitch hydraulic cylinder (109), and the other end of the main arm pitch hydraulic cylinder (109) is hinged to the frame (3);

The top end of the main arm movable arm (106) is hinged with the rotating device (102), the top of the rotating device (102) is fixed with a drilling machine arm (104), and the drilling machine (101) is mounted on the drilling machine arm (104);

One end of the rig pitch hydraulic cylinder (103) is hinged to the main boom movable arm (106), and the other end of the rig pitch hydraulic cylinder (103) is hinged to the swing device (102).
A multifunctional anchor rig according to claim 3, wherein in the rig arm (104), the sliding rig base (1042) is movably connected to the fixed rig arm (1041) and can be fixed along The drill arm (1041) slides, the drill (101) is fixedly connected with the sliding drill base (1042), and the drill rail (105) is further fixed on the fixed drill arm (1041);

The swinging device (102) is fixedly coupled to one end of the drilling hydraulic cylinder (110), and the other end of the drilling hydraulic cylinder (110) is coupled to the sliding drill base (1042).
A multi-functional anchor rig according to claim 3 or 4, wherein in the slewing device (102), a rotating support (1021) is fixed at the bottom of the slewing worm housing (1025). The rotary support (1021) is hinged with the main boom movable arm (106), and the rotary worm wheel (1026) is rotatably mounted in the rotary worm gear housing (1025), and the end surface of the rotary worm gear (1026) is fixed to the fixed drill arm (1041) The connection, the rotary worm housing (1023) is fixedly connected with the rotary worm gear housing (1025), the rotary worm (1024) is rotatably mounted in the rotary worm housing (1023), the rotary worm (1024) and the rotary worm gear (1026) The meshing connection, the swing hydraulic motor (1022) is fixedly connected to the rotary worm (1024).
A multi-functional anchor rig according to claim 4, wherein a rig arm positioning tooth (1043) is provided at an end of the fixed rig arm (1041) adjacent to the drill pipe guide (105).
A multi-functional anchor rig according to claim 1, wherein in the auxiliary arm (2), the bottom of the auxiliary arm fixing arm (22) is fixed to the frame by the pin shaft (3) The auxiliary arm seat (33) is hinged;

The auxiliary arm movable arm (23) is sleeved in the auxiliary arm fixing arm (22), and in the auxiliary arm fixing arm (22), the bottom end of the auxiliary arm movable arm (23) and the auxiliary arm fixing arm (22) An auxiliary arm telescopic hydraulic cylinder (21) is arranged between the bottom of the cavity;

The auxiliary arm fixing arm (22) is hinged to one end of the auxiliary arm pitching hydraulic cylinder (26), and the other end of the auxiliary arm pitching hydraulic cylinder (26) is hinged to the frame (3);

The free end of the auxiliary arm movable arm (23) is hinged to the operating platform (25), and the auxiliary arm movable arm (23) is also hinged to one end of the leveling hydraulic cylinder (24) to level the other end of the hydraulic cylinder (24) and operate The platform (25) is hinged.
A multi-functional anchor drilling rig according to claim 1, characterized in that the auxiliary frame buffer guard (27) is arranged on the frame (3) below the auxiliary arm (2).
A multi-functional anchor rig according to claim 8, wherein in the auxiliary arm damper protection device (27), the buffer piston (272) is movably mounted in the buffer cylinder inner chamber (273). The top of the buffer piston (272) is provided with a bracket (271), and the outer periphery of the buffer cylinder inner chamber (273) is provided with a buffer cylinder outer chamber (274), and the buffer cylinder inner chamber (273) and the buffer cylinder outer chamber (274) are The position of the bottom is communicated by at least one oil passage (276), and a buffer spring (275) is provided between the buffer piston (272) and the bottom of the buffer cylinder inner chamber (273).
A multifunctional anchor rig according to claim 7, wherein an ultrasonic distance sensor is provided on the operating platform (25).