JP3833624B2 - Drilling rig drill pipe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drill pipe or a drilling rod in which a coupling for transmitting rotational torque is provided at an end of a drill pipe used in a drilling device so that upper and lower drill pipes are detachably connected.
[0002]
[Prior art]
The cast-in-place pile method is a method in which holes are drilled using a special machine at the construction site, and a concrete cage or mortar is laid with a reinforcing steel cage or core, and the Benot method, earth drill method, reverse method, etc. is there. The Benoto method is to press-fit a casing tube (steel pipe) while vibrating, excavate the earth and sand in the tube with a hammer magnet etc. and excavate it to a predetermined depth, and then lay a rebar cage and place concrete. This is a construction method that is unsuitable for construction in urban areas because the casing tube is press-fitted while vibrating on a large scale. In the earth drill method, a rotating bucket is attached with a blade and excavated, and the earth is pulled up to the ground using the bucket. In the reverse method, drilling is performed with a reverse circulation drill, and the produced slime is sucked up from the tip of the bit together with the muddy water and eliminated.
[0003]
Under the construction conditions in a narrow construction place and restricted space height, the top drive reverse construction method (TBH construction method) is actively adopted as an improvement of the rotary boring construction method (BH construction method) and the reverse construction method.
The rotary boring method is also called a BH (Boring Hole) method, which uses a boring machine having a power of 22 kw or higher and rotates an excavating bit attached to the tip of the boring rod for excavation. For excavation, the stable liquid is sent to the tip of the bit by a grout pump, the excavated sediment is carried to the hole by the rising water flow by the normal circulation, and discharged by the side pump installed at the hole. After excavation is completed, slime treatment is performed, and cast-in-place concrete piles are built with reinforcing steel, and concrete is cast to build the piles. In addition, concrete piles, steel pipe piles, and H steel are built, and mortar is injected to create embedded piles.
This construction method is characterized by the fact that the construction machine is small and can be constructed on a small site, and is the most compact of the existing pile excavation methods. In addition, (1) construction on a small site is possible. (2) Installation is possible even when the indoor work height is low. (3) Since the machine is light and small, it can be loaded even on narrow roads. (4) Large heavy machinery is not required for assembly and disassembly of the machine. (5) There is an advantage that noise and vibration during construction is very small.
[0004]
Prior to the development of a dedicated excavator, a large-diameter (φ90mm or 150mm) spindle was attached to a conventional boring machine and the BH reverse method was used for construction. A construction method (TBH method) has been developed, and large-diameter drilling can be performed faster by reverse drilling. In addition, the development of this method has made it possible to more reliably manage and construct the slime sediment that was problematic in the regular circulation excavation method.
In recent years, three-dimensional intersection construction, earthquake-proof reinforcement pile construction, bridge pier reinforcement pile construction, elevated construction, underground expressway entrance intermediate support pile construction, etc. are prosperous, and there are narrow conditions with low work overhead under existing structures. Often used in construction. The excavation stable liquid circulation method is different from the BH method, and the construction procedures and management are the same for other operations, but (1) construction is possible on narrow sites. (2) Installation is possible even when the indoor work height is low. (3) Since the machine is light and small, it can be loaded even on narrow roads. (4) Large heavy machinery is not required for assembly and disassembly of the machine. (5) Very little noise and vibration during construction. (6) The slime treatment of the hole bottom can be surely performed. (7) Cobblestone and soft rock formation can be excavated by using a trochoid bit. (8) Since large diameter excavation is possible (maximum diameter: 2,000 mm), it has the feature that excavation of soft ground can be performed without problems.
[0005]
[Problems to be solved by the invention]
The point of the present invention is that a thick coupling is attached to the drill pipe or drilling rod connecting part for powerful forward / reverse rotation and torque transmission. A groove for insertion (insertion) is taken in the thick coupling, and a key (for torque transmission) attached to the outer periphery of the circular steel pipe on one receiving side is attached and docked.
Further, in the present invention, a rotating rod having a square hole rotates a drilling rod to transmit torque, so that a square shape is obtained in a circular coupling portion, and a rectangular plane of a main portion of a pipe is obtained. Flat steel is attached to obtain a surface to match with.
[0006]
When excavating with the top drive type, it is not necessary to rotate the rod with a rotary table and transmit torque, and the circular drill pipe and joint part only need to use a thick coupling, so the whole is cylindrical become. The role of the one-touch joint is as follows: (1) simplify attachment / detachment, (2) secure sealing, (3) transmit rotational torque, (4) respond to forward / reverse rotation, (5) load necessary for the bit There is to communicate.
However, the pipe in the above construction method is complicated in attaching and detaching operations when connected up and down, so that the sealing performance and the transmission of the rotational torque are insufficient by the work by human power. Accordingly, an object of the present invention is to provide a drill pipe in which a coupling for transmitting rotational torque is provided at an end of a pipe so that upper and lower pipes are detachably connected.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a drill in which a drill pipe with a square mantle that can be inserted into a square hole formed in a rotary table of a drilling device at the time of excavation of a pile hole in an on-site pile method is connected vertically. A collar is fixed to the upper end of the drill pipe, and a corrugated uneven portion for a joint is formed on the upper edge of the collar, and the lower drill pipe is connected to the lower end of the drill pipe near the lower end of the drill pipe when the drill pipe is connected. Protrusions or protrusions that mesh with corrugated irregularities formed on the upper edge of the collar are provided, and the square mantle has a width that divides the outer circumference of the pipe into approximately four equal parts on the outer surface of the drill pipe, and the longitudinal direction of the outer surface of the pipe body. It is juxtaposed over almost the entire length ,
A cutout flat portion is formed at the center of the upper and lower ends of the square mantle, and a hook or clamp biased in a spring closing direction is attached to the cutout flat portion of the lower end of the square mantle, while a cutout is formed at the upper end of the square mantle. An engagement hole for hooking the hook or clamp on the convex portion of the corrugated uneven portion corresponding to the flat portion is provided,
A drill pipe of a drilling device characterized in that the hook or clamp is hooked on the engagement hole when the drill pipe is vertically connected, and the drill pipe is connected in the forward / reverse rotation direction and the vertical direction with a single touch. is there.
[0008]
The joint of claim 3 is composed of a bayonet joint type recess provided at several locations on the upper peripheral wall of the drill pipe body, and several convex parts that can be engaged with the recess on the lower peripheral wall of the drill pipe body, A member capable of responding to forward and reverse rotation of the drill pipe or a removable sponge is fitted to the joint portion.
According to a fourth aspect of the present invention, while the rotary table in the excavating apparatus is formed with a square hole for inserting a drill pipe, the outer periphery of the pipe body is substantially arranged on the outer periphery of the drill pipe body so as to be inserted into the square hole. The drill pipe is characterized in that it has a width that divides into four parts and a rectangular outer cannula over the entire length in the longitudinal direction of the pipe body is fixed to transmit the rotational torque of the rotary table.
[0009]
According to a fifth aspect of the present invention, a square cannula having a width that substantially divides the pipe body outer periphery into a plurality of equal parts and extending substantially over the entire length of the pipe body is fixed to the outer periphery of the drill pipe body, and a joint is attached to the upper and lower ends of each square mantle. A notch peripheral surface part or meshing uneven part for forming a hook spring is attached to the lower notch flat part, and a protrusion is provided on the upper notch flat part to hold the hook spring when the drill pipe is connected. It is characterized by.
[0010]
According to a sixth aspect of the present invention, a collar is fixed to the upper end of the drill pipe main body, a plurality of concave and convex portions for joints are formed along the circumference of the upper edge of the collar, and the concave portion is engaged with the lower peripheral wall of the drill pipe main body. A plurality of projections that can be formed, and a square mantle having a width that divides the outer circumference of the pipe main body into approximately four equal parts and extending substantially along the entire length in the longitudinal direction of the pipe main body is fixed to the outer circumference of the drill pipe main body. A notch peripheral surface portion is formed at the center of the upper and lower ends, a clamp is attached to the lower end notch flat portion, and an engagement hole is provided in the upper notch peripheral surface portion for engaging the clamp when the drill pipe is connected, and further adjacent to each other. An air lift pipe is additionally provided in the longitudinal direction of the drill pipe in the corner space formed between the square mantles.
[0011]
According to a seventh aspect of the present invention, there is provided a rectangular cannula that has a width that divides the outer periphery of the drill pipe body into four equal parts and covers the entire length of the pipe body in the longitudinal direction, and the upper end of each square cannula projects a predetermined length from the drill pipe body. In this way, the engagement projection or engagement recess for the joint is formed, and the lower end of each square mantle is shorter than the lower end of the drill pipe main body by a predetermined length and is inserted into the engagement projection or engagement recess on the upper side of the square mantle. An engagement recess or an engagement protrusion is formed for mating, and a clamp receiver is formed between the rectangular mantles near the upper end of the outer mantle, while the clamp receiver is engaged between the outer mantles near the lower end of the outer cylinder. The clamp biased in this way is provided, and the forward / reverse rotation direction and the vertical direction of the drill pipes arranged up and down are connected with one touch.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
When practicing the present invention, a drill pipe that is held up and down by a head of a drilling machine is inserted into a rotary table (not shown) arranged at a ground level in front of the machine, and a stable liquid is pumped into the drill pipe. While excavating the ground with the tip bit and sucking out the produced slime from the tip of the bit together with the muddy water, any method of normal circulation or reverse circulation can be applied. In addition, when the excavation depth is deep, excavation by an air lift method is also possible.
A steel pipe coupling is attached to the connecting part of the drill pipe (drilling rod) in order to transmit torque in a powerful forward / reverse direction. That is, as will be described later with reference to the drawing, a plurality of grooves or grooves are attached to the tip of a relatively thick steel pipe coupling (for example, a coupling wall thickness of 35 to 40 mm for a drill pipe having an outer diameter of 240 mm) attached to one of the drill pipes. A key or convex part is provided on the outer periphery of the receiving side of the pipe not formed with a coupling while forming a concave part, and a groove or concave part at the leading end of the coupling of the pipe that follows the key or convex part on the receiving side of the pipe connecting part preceded. Are inserted, inserted or engaged to be connected with one touch. One-touch joints are (1) easy to attach / detach, (2) rotational torque transmission, (3) forward / reverse rotation, (4) transmit the necessary load to the bit, further coupling By sealing a sealing material (O-ring) in the inner wall, the sealing performance of the connecting portion can be ensured.
[0013]
FIG. 1 is a partially longitudinal front view of a first embodiment of a drill pipe of a drilling device of the present invention, and FIG. 2 is a plan view of FIG.
A coupling 13 is formed on the flange 11 at the top of the drill pipe 10. This coupling 13 has a concave portion 14 constituting a bayonet joint (or bayonet joint) at at least two locations in the diameter direction of the flange, and a convex portion 15 is provided on the outer periphery near the lower end of the pipe. . Further, four rectangular mantles 16 and 16 are fixed to the outer surface of the drill pipe so as to have a width that divides the outer periphery into substantially four equal parts and substantially the entire length of the pipe body in the longitudinal direction.
When excavating using this drill pipe 10, the square mantle 16 of the drill pipe body is inserted into a square hole (not shown) drilled in a rotary table in the excavator and rotated. When connecting drill pipes arranged vertically during excavation, the upper pipe can be connected by one-touch by inserting the convex part 15 at the lower end into the concave part 14 at the upper end of the lower pipe while turning the upper pipe. Can be broken by raising. In the figure, reference numeral 17 denotes an air lift pipe.
[0014]
FIG. 3 is a partially longitudinal front view of a second embodiment of the drill pipe, and FIG. 4 is a plan view of FIG.
In this drill pipe, a thick collar 12 is fixed to one end (upper end outer periphery) of the pipe, and a plurality of bayonet joint recesses 14 are formed at intervals on the upper edge portion of the collar. A convex portion 15 is provided near the lower end of the pipe. In the same manner as in FIGS. 1 and 2, four rectangular outer mantles 16, 16 are attached to the outer surface of the drill pipe so as to have a width that divides the outer periphery into approximately four equal parts and extends substantially along the entire length in the longitudinal direction of the pipe body. When excavating, the square mantle 16 of the drill pipe body is inserted into the square hole opened in the rotary table of the excavator and rotated. Also in this case, when connecting the drill pipe during excavation, the upper pipe can be connected by one-touch by inserting the lower end convex portion 14 into the lower pipe upper end concave portion 15 while turning the upper pipe. Can be broken by raising.
[0015]
FIG. 5 shows a front view of a third embodiment of the drill pipe. A thick collar 18 is fixed to one end (upper end outer periphery) of the drill pipe 10 to form a joint recess 14 and the other end. Providing the convex portion 15 on the outer periphery near the lower end is the same as in the previous embodiment, but the square mantle is not fixed and rotated at the top of the drill pipe 10. In this case, after inserting the convex portion 15 into the joint concave portion 14, a removable sponge 19 is sandwiched behind the convex portion 15 as a member that can cope with forward and reverse rotation of the drill pipe 10.
[0016]
FIG. 6 is a partially broken front view of a fourth embodiment of the drill pipe.
In the drill pipe 10 of this example, a square cannula 16 is fixed to the outer periphery of the main body, meshing concave and convex portions 21 and 22 constituting a coupling 20 are formed on the top and bottom of each square mantle, and a hook 23 is provided near the lower meshing concave portion 21. At the same time, the upper meshing projection 22 is provided with a hooking projection 24 for hooking the hook when the drill pipe is connected. When the pipes are connected, the concavo-convex portions 21 and 22 mesh with each other to transmit rotational torque, and can cope with forward and reverse rotation.
[0017]
FIG. 7 is a partially broken front view of a fifth embodiment of the drill pipe, and FIG. 8 is an enlarged vertical side view of the clamp. The collar 12 is fixed to the upper end of the drill pipe 10, and a number of corrugated concave portions 26 for the joint are formed along the circumference of the upper edge of the collar 12, and the concave portion 26 is engaged with the lower peripheral wall of the drill pipe body. A large number of convex portions or protrusions 27 are formed. As before, the outer periphery of the drill pipe 10 has a width that divides the outer periphery of the pipe body into four equal parts, and
Four rectangular mantles 16 and 16 are fixed to substantially the entire length of the pipe body in the longitudinal direction. A notch 28 is formed at the center of the lower end of the square mantle to attach the clamp 30, and the projection 26a formed between the corrugated irregularities 26, 26 of the collar 12 at the upper end of the pipe is connected to the above-mentioned when the drill pipe is connected. An engagement hole 31 is provided for latching the tip 29 of the clamp 30. The clamp 30 has a spring 32 (FIG. 8) that constantly biases the tip 29 in the closing direction, and the tip of the clamp 30 is automatically engaged with the engagement hole 31 when the upper and lower pipes are approached at the time of connection. In order to release the connection of the pipes, a solenoid-type clamp releasing means 38 is provided in the vicinity of a rotary table (not shown). Further, an O-ring 37 is embedded in the inner surface of the collar 12 where the upper drill pipe is connected to maintain the sealing performance of the connecting portion. In FIG. 8, reference numeral 30a denotes a shaft of the clamp 30, and 38a denotes a solenoid plunger.
[0018]
FIG. 9 is an enlarged cross-sectional view of FIG. 7 and shows a state in which the air lift pipe 17 is arranged in the longitudinal direction of the corner space formed between the rectangular mantles 16. FIG. 10 shows that the air lift pipe 17 maintains the sealing performance of the joint portion 35 and the socket 36 by the O-ring 37. In the figure, reference numeral 39 denotes a square hole of the rotary table.
[0019]
11 is a front view of a sixth embodiment of a drill pipe, FIG. 12 is a cross-sectional view of the pipe of FIG. 11, (a) is a cross-sectional view taken along the line aa, and (b) is a cross-sectional view taken along the line bb. (C) is sectional drawing in the cc line.
In this example, the square mantles 16, 16 are fixed to the outer periphery of the drill pipe 40, and the upper end of each square mantle 16 protrudes from the drill pipe main body by a predetermined length to form the joint engaging convex portion 41 or the engaging concave portion 42. In addition, the lower end of the drill pipe body is made a predetermined length shorter than the lower end of the drill pipe main body to form the engagement concave portion 42 or the engagement convex portion 41 to be inserted into the engagement convex portion 41 or the engagement concave portion 42 on the upper side of the square mantle. The clamp receiver 43 is formed between the rectangular mantles near the upper end of the square mantle, and the clamp 44 biased to engage with the clamp receiver 43 is provided between the angular mantles near the lower end of the mantle. The drill pipes that are arranged are connected in the forward / reverse direction and the vertical direction with one touch.
[0020]
【The invention's effect】
As described above, according to the present invention, the engagement means is provided on the upper peripheral wall and the lower peripheral wall of the drill pipe main body, and the rotation direction and the vertical direction of the drill pipes arranged vertically can be connected with one touch. In addition, the one-touch joint part transmits forward and reverse torque, transmits the necessary load to the bit, and has a sealing property so that the stable liquid does not leak. .
[Brief description of the drawings]
FIG. 1 is a partially longitudinal front view of a first embodiment of a drill pipe of a drilling device of the present invention.
FIG. 2 is a plan view of FIG.
FIG. 3 is a partially longitudinal front view of a second embodiment of a drill pipe.
4 is a plan view of FIG. 3. FIG.
FIG. 5 is a front view of a third embodiment of a drill pipe.
FIG. 6 is a partially cutaway front view of a fourth embodiment of a drill pipe.
FIG. 7 is a partially broken front view of a fifth embodiment of a drill pipe.
8 is an enlarged side view of the clamp in FIG. 7. FIG.
9 is an enlarged cross-sectional view of FIG.
10 is an enlarged cross-sectional view of the air lift pipe joint portion in FIG. 9;
FIG. 11 is a front view of a sixth embodiment of a drill pipe.
12 shows a cross section of the pipe of FIG. 11, where (a) is a cross-sectional view taken along line aa, (b) is a cross-sectional view taken along line bb, and (c) is a cross-sectional view taken along line cc. is there.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Drill pipe 11 Flange 12 Collar 13 Coupling 14 Concave 15 Convex 16 Square outer mantle 17 Air lift pipe 19 Kaimono 20 Coupling 21 Concave 22 Convex 23 Hook spring 24 Latching projection 26 Waveform concavity 27 Oval convex part 28 Concave 29 Clamp tip 30 Clamp 31 Engagement hole 32 Return spring 35 Joint part 36 Socket 37 O-ring 38 Solenoid 39 Square hole 40 of rotary table Drill pipe 41 Convex part 42 Concave part 43 Clamp receiver 44 Clamp

Claims (1)

A drill pipe with a square outer jacket that can be inserted into a square hole formed on the rotary table of the drilling device when excavating a pile hole in the on-site pile method,
A collar is fixed to the upper end of the drill pipe, and a corrugated concave / convex portion is formed on the upper edge of the collar, and is formed on the upper edge of the collar of the lower drill pipe when the drill pipe is connected near the lower end of the drill pipe. Protrusions or protrusions that mesh with the corrugated irregularities that have been made,
Wherein the outer periphery of the drill pipe has a width of approximately 4 equal parts the outer circumference, and rectangular mantle length over the longitudinal direction substantially the entire length of the pipe body outer surface is juxtaposed,
The rectangular lower end notch to form a flat portion in the middle on the mantle, while attaching the hook or clamp which is biased in a closing direction by a spring in the flat portion notch prismatic mantle lower end, turn off the square mantle upper portion An engagement hole is provided to latch the hook or clamp on the convex portion of the corrugated uneven portion corresponding to the notch flat portion ,
A drill pipe of a drilling device, wherein the hook or clamp is hooked on the engagement hole when the drill pipe is vertically connected, and the drill pipe is connected in the forward / reverse rotation direction and the vertical direction with a single touch.

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