Drill rod disassembling device and drill rod disassembling method

Abstract

A drill rod disassembly device includes a main chassis, a mast, a rotary reducer, a short fork plate, a long fork plate, a pad, a power head, and a drill rod; the mast is fixedly mounted in front of the main chassis; the bottom flange ring is vertically arranged at the bottom of the mast; the power head is placed on the mast guide rail; the rotary reducer is fixedly mounted at the lower end of the bottom flange ring; the pad is fixedly mounted to the rotary reducer; the short fork plate is placed in the area surrounded by four guide blocks on the pad, and its inner snap-in is inserted into the joint notch of the upper joint of the drill rod; the long fork plate is placed on the upper end face of the bottom flange ring, and its inner snap-in is inserted into the joint notch of the butt joint. A drill rod disassembly method using the drill rod disassembly device includes the steps of installing the long fork plate, installing the short fork plate, operating the rotary reducer to reverse, removing the short fork plate, and the like. The drill rod disassembly device of the present invention is conducive to the addition and removal of drill rods, is simple and convenient to operate, and is suitable for drilling rigs to carry out cast-in-place pile construction in low clearance areas with limited height and adjacent to existing buildings, effectively improving construction efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of construction machinery, and in particular relates to a drill rod disassembling device and a drill rod disassembling method thereof. Background Art

[0002] In the existing urban rail transit, city center building pile construction and foundation reinforcement projects, there are often structures above the construction site, high-voltage power facilities, construction under the communication line network or under the bridge, and working conditions close to existing buildings. Due to the limited construction height and surrounding environment, the drill rod connection operation is very frequent during pile foundation construction. During the drilling and mixing process of the drilling rig, the drilling tool and its auxiliary equipment often require a higher construction space. The traditional walking drilling rig cannot enter the construction site or approach the existing building due to the tall mast and large area. Therefore, in the face of such a complex surrounding environment, the measures taken by the construction company are generally to negotiate with the power grid and communication departments to temporarily cut off the power grid and communication network lines above the pile foundation construction area, and then connect the power grid and lines after the pile foundation construction is completed, which will cause great consumption of construction progress and construction costs. In the case of fruitless negotiation, the design plan of pile foundation construction or foundation treatment can only be changed, which seriously affects the construction progress and causes a lot of resource waste. Therefore, it is necessary to develop a drill rod disassembly device that can adapt to the drilling rig for cast-in-place pile construction and foundation reinforcement in low-clearance areas with limited construction site height, close to surrounding buildings, and greatly affected by the surrounding environment. Summary of the invention

[0003] The main purpose of the present invention is to overcome the shortcomings of the prior art and provide a drill rod disassembly device and a disassembly method thereof, which have the characteristics of simple structure and easy operation. It is suitable for low-clearance drilling rigs to carry out bored pile construction and foundation reinforcement in low-clearance areas with limited height and adjacent to existing buildings, thereby ensuring the quality of bored piles and further improving the efficiency of bored pile operations.

[0004] The drill pipe disassembling device used by the present invention to solve the technical problem comprises a main chassis, a mast including a bottom flange ring and two guide rails, a rotary reducer, a short fork plate including an inner bayonet, a long fork plate including an inner bayonet and a handle, a pad including four guide blocks and a pad through hole, a power head including an output shaft and a butt joint, and a plurality of drill pipes with upper joints and lower joints, wherein: the butt joint of the power head comprises a joint notch and a right-handed conical internal thread; the upper joint of the drill pipe comprises a joint notch and a right-handed conical external thread; the lower joint of the drill pipe comprises a joint notch and a right-handed conical internal thread;

[0005] Features:

[0006] The mast is fixedly mounted in front of the chassis of the main engine, and is hingedly connected to the front end support of the chassis of the main engine through the lower support; the bottom flange ring of the mast is vertically arranged at the bottom of the front side;

[0007] The slewing reducer is fixedly mounted on the lower end surface of the bottom flange ring of the mast;

[0008] The four guide blocks of the pad are arranged in a rectangular manner on the end surface outside the pad through hole; the pad is fixedly mounted on the rotary circle of the lower end surface of the rotary reducer, and the four guide blocks of the pad are located in the inner cavity of the rotary reducer;

[0009] The power head is placed on the two guide rails of the mast through its guide plate, and the butt joint is fixed to the lower end of the output shaft of the power head; multiple sections of drill rods and external drill bits are sequentially connected below the butt joint, and during the forward rotation of the power head, the upper joint of the drill rod and the butt joint, the lower joint of the upper section of the drill rod and the upper joint of the lower section of the drill rod, until the last section of the drill rod and the external drill bit are locked; the power head is operated to move downward along the two guide rails of the mast, and the multiple sections of drill rods and external drill bits connected to the butt joint sequentially pass through the bottom flange ring of the mast, the inner cavity of the rotary reducer, and the through hole of the pad, and then enter the formation downward to drill to the required hole depth;

[0010] After the multi-section drill pipe is drilled to the required hole depth with the external drill bit, the power head is closed to stop the multi-section drill pipe from rotating forward, and the inner snap-in of the short fork plate is aligned with the joint notch of the upper joint of the lower section of the drill pipe and inserted, and after passing through the inner cavity of the rotary reducer, it is placed in the area surrounded by four guide blocks on the pad to lock the lower section of the drill pipe; the inner snap-in of the long fork plate is aligned with the joint notch of the docking joint of the power head and inserted, and the handle is placed on the upper end surface of the bottom flange ring of the bottom section of the mast to lock the docking joint;

[0011] The thickness of the short fork plate is greater than the height of the four guide blocks of the pad.

[0012] In addition, the present invention also provides a drill rod disassembling method of the drill rod disassembling device, comprising the following steps:

[0013] 1) Install the long fork plate

[0014] When the butt joint of the power head and the upper joint of a drill pipe section located below the butt joint respectively descend to the position above the bottom flange ring of the mast and between the rotary reducer and the pad, the driving system of the power head is turned off, the butt joint and the multiple drill pipe sections connected thereto and the external drill bit are stopped from rotating forward, and the long fork plate is placed on the upper end surface of the bottom flange ring of the mast, and the inner bayonet thereof is aligned with the joint notch of the butt joint, inserted and locked;

[0015] 2) Install the short fork plate

[0016] Insert the short fork plate into the inner cavity of the rotary reducer from the large through hole of the bottom flange ring and place it in the area surrounded by the four guide blocks on the pad. Align the inner bayonet with the joint notch of the upper joint of the drill pipe section below and then insert and lock it.

[0017] 3) Operate the rotary reducer to rotate in the opposite direction

[0018] The rotary reducer is operated to rotate in the reverse direction, and the lower drill pipe rotates in the reverse direction with the rotary reducer. The long fork plate rotates with the docking joint until its handle reaches the mast and stops. The rotary reducer continues to rotate in the reverse direction to drive the short fork plate and the right-handed conical external thread of the upper joint of the lower drill pipe to loosen from the right-handed conical internal thread of the docking joint. The long fork plate is pulled out from the joint notch of the docking joint, and the power head is operated to move upward along the mast. The docking joint is completely disengaged from the drill pipe and leaves the rotary reducer and the bottom flange ring of the mast.

[0019] 4) Remove the long fork plate and short fork plate

[0020] After the detached drill pipe section is lifted off the power head, operate the power head downward along the mast and rotate it forward. When the right-handed conical internal thread of the docking joint enters into the right-handed conical external thread of the upper joint of the drill pipe section below and is completely tightened, take out the short fork plate from the upper end face of the bottom flange ring of the mast and the pad respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the drill pipe disassembling device of the present invention;

[0022] Figure 2 yes Figure 1 A top view of

[0023] Figure 3 yes Figure 1 Middle AA section view;

[0024] Figure 4 yes Figure 3 Middle BB section view;

[0025] Figure 5 It is a schematic diagram of the structure of the power head in the drill pipe disassembling device of the present invention;

[0026] Figure 6 It is a structural schematic diagram of a long fork plate in a drill rod disassembling device of the present invention. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-6 The drill pipe disassembling device of the present invention is further described.

[0028] A drill pipe disassembling device comprises a main chassis 11, a mast 21 including a bottom flange ring 211 and two guide rails 213, a rotary reducer 6, a short fork plate 71 including an inner bayonet 712, a long fork plate 72 including an inner bayonet 712 and a handle 725, a pad 73 including four guide blocks 731 and a pad through hole 732, a power head 3 including an output shaft 32 and a butt joint 33, and a drill pipe 8 having multiple sections with an upper joint 42 and a lower joint 43, wherein the butt joint 33 of the power head 3 comprises a joint notch 345 and a right-handed conical internal thread; the upper joint 42 of the drill pipe 8 comprises a joint notch 345 and a right-handed conical external thread; the lower joint 43 of the drill pipe 4 comprises a joint notch 345 and a right-handed conical internal thread; wherein,

[0029] The mast 21 is fixedly mounted in front of the main engine chassis 11 and is hingedly connected to the front end support 112 of the main engine chassis 11 via a lower support 212 ; the bottom flange ring 211 of the mast 21 is vertically arranged at the bottom of the front side thereof.

[0030] The rotary reducer 6 is fixed to the lower end surface of the bottom flange ring 211 of the mast 21 .

[0031] The four guide blocks 731 of the backing plate 73 are arranged in a rectangular manner on the end surface outside the backing plate through hole 732; the backing plate 73 is fixed on the rotating circle of the lower end surface of the rotary reducer 6, and the four guide blocks 731 of the backing plate are located in the inner cavity of the rotary reducer 6. When the rotary reducer 6 is driven by external power, the backing plate 73 rotates with the rotating circle of the rotary reducer 6.

[0032] The power head 3 is placed on the two guide rails 213 of the mast 21 through its guide plate, and the docking joint 33 is fixed to the lower end of the output shaft 32 of the power head; multiple sections of drill rod 4 and an external drill bit are sequentially connected below the docking joint 33, and during the forward rotation of the power head 3, the upper joint 42 of the drill rod 4 and the docking joint 33, the lower joint 43 of the upper section of the drill rod 4 and the upper joint 42 of the lower section of the drill rod 4, and the last section of the drill rod 4 and the external drill bit are locked; the power head 3 is operated to move downward along the two guide rails 213 of the mast 21, and the multiple sections of drill rod 4 connected to the docking joint 33 and the external drill bit sequentially pass through the bottom flange ring 211 of the mast 21, the inner cavity of the rotary reducer 6, and the pad through hole 732, and then enter the formation downward to drill to the required hole depth.

[0033] After the multi-section drill pipe 4 is drilled to the required hole depth with the external drill bit, the power head 3 is closed to stop the multi-section drill pipe 4 from rotating forward, and the inner opening 712 of the short fork plate 71 is aligned with the joint notch 345 of the upper joint 42 of the lower section drill pipe 4 and inserted, and after passing through the inner cavity of the rotary reducer 6, it is placed in the area surrounded by the four guide blocks 731 on the pad 73 to lock the lower section drill pipe 4; the inner opening 712 of the long fork plate 72 is aligned with the joint notch 345 of the docking joint 33 of the power head 3 and inserted, and the handle 725 is placed on the upper end surface of the bottom flange ring 211 of the bottom section mast of the mast 21 to lock the docking joint 33. The thickness of the short fork plate 71 is greater than the height of the four guide blocks 731 of the pad 73. In this way, when the rotary reducer 6 rotates in the reverse direction, it is ensured that the short fork plate 71 effectively locks the lower section drill pipe 4.

[0034] Combination Figure 1-6 The drill pipe disassembly method using the drill pipe disassembly device comprises the following steps:

[0035] Step 1: Install the long fork plate 72

[0036] When the docking joint 33 of the power head 3 and the upper joint 42 of a drill pipe 8 located below the docking joint respectively descend to the position above the bottom flange ring 211 of the mast 21 and between the rotary reducer 6 and the pad 73, the driving system of the power head 3 is turned off, the docking joint 33 and the multiple drill pipes 4 and the external drill bit connected thereto stop rotating forward, and the long fork plate 72 is placed on the upper end surface of the bottom flange ring 211 of the mast 21, and its internal snap-in 712 is aligned with the joint slot 345 of the docking joint 33 and inserted and locked.

[0037] Step 2: Install the short fork plate 71

[0038] The short fork plate 71 is inserted into the inner cavity of the rotary reducer 6 from the large through hole of the bottom flange ring 211 and then placed in the area surrounded by the four guide blocks 731 on the pad 73. The inner bayonet 712 is aligned with the joint notch 345 of the upper joint 42 of the lower drill pipe section 4 and then inserted and locked.

[0039] Step 3: Operate the rotary reducer 6 to rotate in the opposite direction

[0040] The rotary reducer 6 is operated to rotate in the opposite direction, and the lower section of the drill pipe 4 rotates in the opposite direction with the rotary reducer 6. The long fork plate 72 rotates with the docking joint 33 until its handle 725 reaches the mast 21 and stops. The rotary reducer 6 continues to rotate in the opposite direction to drive the short fork plate 71 and the right-handed conical external thread of the upper joint 42 of the lower section of the drill pipe 4 to loosen from the right-handed conical internal thread of the docking joint 33, and the long fork plate 72 is pulled out from the joint notch 345 of the docking joint 33. The power head 3 is operated to move upward along the mast 21, and the docking joint 33 is completely detached from the drill pipe 4 and leaves the rotary reducer 6 and the bottom flange ring 211 of the mast 21.

[0041] Step 4: Remove the short fork plate 71

[0042] After the detached drill pipe 4 is lifted off the power head 3, the power head 3 is operated to move downward along the mast 21 and rotate forward. When the right-handed conical internal thread of the docking joint 33 enters into the right-handed conical external thread of the upper joint 42 of the drill pipe below and is completely tightened, the short fork plate 71 is taken out from the upper end surface of the bottom flange ring 211 of the mast 21 and the pad 73 respectively.

[0043] The drill rod disassembly device and the disassembly method of the present invention have the characteristics of simple structure and easy operation, and are suitable for the construction of bored piles and foundation reinforcement in low-headroom areas with limited height and adjacent to existing buildings by drilling rigs, effectively ensuring the quality of bored piles and further improving the efficiency of bored pile construction.

[0044] Various changes and improvements may be made to the present invention without departing from the overall concept of the present invention. However, as long as they are identical or equivalent to the present invention, they also fall within the protection scope of the present invention.

Claims

1. A drill pipe disassembling device, comprising a main chassis (11), a mast (21) including a bottom flange ring (211) and two guide rails (213), a rotary reducer (6), a short fork plate (71) including an inner bayonet (712), a long fork plate (72) including an inner bayonet (712) and a handle (725), a backing plate (73) including four guide blocks (731) and a backing plate through hole (732), a power head (3) including an output shaft (32) and a butt joint (33), and a plurality of drill pipes (4) having upper joints (42) and lower joints (43), wherein: The butt joint (33) of the power head (3) comprises a joint notch (345) and a right-handed conical internal thread; The upper joint (42) of the drill rod (4) comprises a joint notch (345) and a right-handed conical external thread; the lower joint (43) of the drill rod (4) comprises a joint notch (345) and a right-handed conical internal thread; Features: The mast (21) is fixedly mounted in front of the main engine chassis (11), and is hingedly connected to a front end support (112) of the main engine chassis (11) via a lower support (212); a bottom flange ring (211) of the mast (21) is vertically arranged at the bottom of the front face thereof; The slewing reducer (6) is fixedly mounted on the lower end surface of the bottom flange ring (211) of the mast (21); The four guide blocks (731) of the backing plate (73) are arranged in a rectangular manner on the end surface outside the backing plate through hole (732); the backing plate (73) is fixedly mounted on the rotating circle of the lower end surface of the rotary reducer (6), and the four guide blocks (731) of the backing plate are located in the inner cavity of the rotary reducer (6); The power head (3) is placed on two guide rails (213) of the mast (21) through its guide plate, and the docking joint (33) is fixed to the lower end of the output shaft (32) of the power head; multiple sections of drill rods (4) and external drill bits are sequentially connected below the docking joint (33); during the forward rotation of the power head (3), the upper joint (42) of the drill rod (4) is connected to the docking joint (33), and the lower joint (43) of the upper section of the drill rod (4) is connected to the lower section of the drill rod (4). The upper joint (42) of the drill rods (4) of the sections until the last section of the drill rod (4) is locked with the external drill bit; the power head (3) is operated to move downward along the two guide rails (213) of the mast (21); the multiple sections of the drill rods (4) connected to the joint (33) and the external drill bit successively pass through the bottom flange ring (211) of the mast (21), the inner cavity of the rotary reducer (6), the through hole (732) of the pad, and then enter the formation downward to drill to the required hole depth; After the multi-section drill rod (4) is drilled to the required hole depth with the external drill bit, the power head (3) is closed to stop the multi-section drill rod (4) from rotating forward, and the inner snap-in (712) of the short fork plate (71) is aligned with the joint notch (345) of the upper joint (42) of the lower section drill rod (4) and inserted, and after passing through the inner cavity of the rotary reducer (6), it is placed in the area surrounded by four guide blocks (731) on the pad (73) to lock the lower section drill rod (4); the inner snap-in (712) of the long fork plate (72) is aligned with the joint notch (345) of the docking joint (33) of the power head (3) and inserted, and the handle (725) is placed on the upper end surface of the bottom flange ring (211) of the bottom mast of the mast (21) to lock the docking joint (33); The thickness of the short fork plate (71) is greater than the height of the four guide blocks (731) of the pad plate (73).

2. The drill pipe disassembly method according to claim 1 comprises the following steps: 1) Install the long fork plate (72) When the butt joint (33) of the power head (3) and the upper joint (42) of a drill pipe section (4) located below the butt joint respectively descend to the position above the bottom flange ring (211) of the mast (21) and between the rotary reducer (6) and the pad (73), the drive system of the power head (3) is turned off, the butt joint (33) and the multiple drill pipe sections (4) connected thereto and the external drill bit are stopped from rotating forward, and the long fork plate (72) is placed on the upper end surface of the bottom flange ring (211) of the mast (21), and the inner bayonet (712) thereof is aligned with the joint notch (345) of the butt joint (33) and then inserted and locked; 2) Install the short fork plate (71) The short fork plate (71) is inserted into the inner cavity of the rotary reducer (6) through the large through hole of the bottom flange ring (211) and then placed in the area surrounded by four guide blocks (731) on the pad (73), and its inner bayonet (712) is aligned with the joint notch (345) of the upper joint (42) of the lower drill rod (4) and then inserted and locked; 3) Operate the slewing reducer (6) to rotate in the opposite direction The rotary reducer (6) is operated to rotate in the reverse direction, and the lower drill pipe section (4) rotates in the reverse direction along with the rotary reducer (6), and the long fork plate (72) rotates along with the docking joint (33) until its handle (725) reaches the mast (21) and stops; the rotary reducer (6) rotates in the reverse direction to drive the short fork plate (71) and the right-handed conical external thread of the upper joint (42) of the lower drill pipe section (4) to loosen from the right-handed conical internal thread of the docking joint (33), and the long fork plate (72) is pulled out from the joint notch (345) of the docking joint (33), and the power head (3) is operated to move upward along the mast (21), so that the docking joint (33) is completely separated from the lower drill pipe section (4), and leaves the rotary reducer (6) and the bottom flange ring (211) of the mast (21); 4) Remove the short fork plate (71) After the disconnected drill pipe section (4) is lifted off the power head (3), the power head (3) is operated to move downward along the mast (21) and rotate in the forward direction. When the right-handed conical internal thread of the butt joint (33) enters the right-handed conical external thread of the upper joint (42) of the lower drill pipe section and is completely tightened, the short fork plate (71) is removed from the upper end surface of the bottom flange ring (211) of the mast (21) and the pad (73), respectively.

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