CA2411253A1 - Step tube rod, and drilling machine - Google Patents
Step tube rod, and drilling machine Download PDFInfo
- Publication number
- CA2411253A1 CA2411253A1 CA002411253A CA2411253A CA2411253A1 CA 2411253 A1 CA2411253 A1 CA 2411253A1 CA 002411253 A CA002411253 A CA 002411253A CA 2411253 A CA2411253 A CA 2411253A CA 2411253 A1 CA2411253 A1 CA 2411253A1
- Authority
- CA
- Canada
- Prior art keywords
- rod
- drill
- step tube
- diameter
- tube rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000005553 drilling Methods 0.000 title abstract 3
- 238000005452 bending Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 12
- 239000011435 rock Substances 0.000 description 12
- 238000010276 construction Methods 0.000 description 10
- 238000005520 cutting process Methods 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 4
- 238000007664 blowing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/24—Guiding or centralising devices for drilling rods or pipes
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
In a drill rod for a drilling machine, the rod outer diameter has a large diameter almost equal to the drill hole diameter, an a male thread is formed at one end and a female thread at the other end, with at least one small diameter portion adjacent the female thread. This step tube rod is capable of reducing the bending of holes. Further, a drilling machine using this step tube rod facilitates the positioning of the drill rod and is capable of efficiently and safely effecting the connecting and recovering operation.
Description
DESCRIPTION
STEP TUBE ROD AND BORING MACHINE
Technical Field The present invention relates to a step tube rod and a boring machine using the step tube rod as a drill rod.
Background Art A boring machine such as a hydraulic crawler drill and a fan cut drill is provided with a rock drill mounted on a guide shell. A drill rod is insertedly mounted in the rock drill, and a bit is installed at the tip end of the drill rod.
Thereby, a blow and rotation are transmitted from the rock drill to the bit via the drill rod, and the rock drill is fed, whereby a rock-bed is bored.
For example, in the case where the boring machine is a hydraulic crawler drill 11 as shown in Figure 8, a boom 14 is provided on a carriage 13 provided with a track frame 12 so as to be turnable and tiltable. At the distal end of the boom 14 is supported a guide shell 16 mounted with a rock drill 15 so as to be capable of tilting and swinging. The rock drill 15 is insertedly mounted with a drill rod 1 connected by a sleeve 2, and at the tip end of the drill rod 1 is installed a bit 3 having an outside diameter approximately equal to a bore diameter Dh.
The rock drill 15 has a blowing mechanism, a rotating mechanism, and a flushing mechanism (not shown). The rock drill 15 is moved longitudinally by a feed force given by a feed motor 17 provided on the guide shell 16, and transmits a blow and rotation to the bit 3 via the drill rod 1, whereby a rock-bed R is bored. Also, the flushing mechanism supplies compressed air to the tip end of the drill rod 1 to discharge cuttings. In the tip end portion of the guide shell 16, a hood 18 is provided to cover the bore and to collect cuttings.
In the case where the bore length is great, a plurality of drill rods 1 are connected successively at the time of boring work. The supply and connection of the drill rods 1 and the separation and recovery of the drill rods 1 after the boring work is finished are carried out mechanically by using a rod changer 19.
In the case where the connection and recovery of the drill rod 1 are carried out, the drill rod 1 must be clamped so that the central axis of the drill rod 1 is fixed when the drill rod 1 is connected or separated, so that a rod clamping device 4 is provided in the vicinity of the tip end portion of the guide shell 16.
The general drill rod 1 used for the above-described hydraulic crawler drill 11 has a hexagonal or circular external shape and has a predetermined size of 51 mm, 45 mm, 38 mm, etc. in outside diameter according to the size of connecting screw (T51 screw, T45 screw, T38 screw, etc. ) . This outside diameter is considerably smaller than the bore diameter Dh.
STEP TUBE ROD AND BORING MACHINE
Technical Field The present invention relates to a step tube rod and a boring machine using the step tube rod as a drill rod.
Background Art A boring machine such as a hydraulic crawler drill and a fan cut drill is provided with a rock drill mounted on a guide shell. A drill rod is insertedly mounted in the rock drill, and a bit is installed at the tip end of the drill rod.
Thereby, a blow and rotation are transmitted from the rock drill to the bit via the drill rod, and the rock drill is fed, whereby a rock-bed is bored.
For example, in the case where the boring machine is a hydraulic crawler drill 11 as shown in Figure 8, a boom 14 is provided on a carriage 13 provided with a track frame 12 so as to be turnable and tiltable. At the distal end of the boom 14 is supported a guide shell 16 mounted with a rock drill 15 so as to be capable of tilting and swinging. The rock drill 15 is insertedly mounted with a drill rod 1 connected by a sleeve 2, and at the tip end of the drill rod 1 is installed a bit 3 having an outside diameter approximately equal to a bore diameter Dh.
The rock drill 15 has a blowing mechanism, a rotating mechanism, and a flushing mechanism (not shown). The rock drill 15 is moved longitudinally by a feed force given by a feed motor 17 provided on the guide shell 16, and transmits a blow and rotation to the bit 3 via the drill rod 1, whereby a rock-bed R is bored. Also, the flushing mechanism supplies compressed air to the tip end of the drill rod 1 to discharge cuttings. In the tip end portion of the guide shell 16, a hood 18 is provided to cover the bore and to collect cuttings.
In the case where the bore length is great, a plurality of drill rods 1 are connected successively at the time of boring work. The supply and connection of the drill rods 1 and the separation and recovery of the drill rods 1 after the boring work is finished are carried out mechanically by using a rod changer 19.
In the case where the connection and recovery of the drill rod 1 are carried out, the drill rod 1 must be clamped so that the central axis of the drill rod 1 is fixed when the drill rod 1 is connected or separated, so that a rod clamping device 4 is provided in the vicinity of the tip end portion of the guide shell 16.
The general drill rod 1 used for the above-described hydraulic crawler drill 11 has a hexagonal or circular external shape and has a predetermined size of 51 mm, 45 mm, 38 mm, etc. in outside diameter according to the size of connecting screw (T51 screw, T45 screw, T38 screw, etc. ) . This outside diameter is considerably smaller than the bore diameter Dh.
The drill rod 1 is available in two types : an MM rod 1A
provided with external threads MS at both ends as shown in Figure 9 (a) , and an MF rod 1B which is provided with external threads MS at one end and the other end of which has a larger diameter and is provided with internal threads FS on the inside as shown in Figure 9(b). When the MM rod 1A is used, it is connected via a sleeve 2, and when the MF rod 1B is used, the external threads MS and the internal threads FS are engaged directly with each other.
As shown in Figures 10 and 11, the rod clamping device 4 is constructed so that the drill rod 1 having a particular diameter is clamped by a pair of clamps 5 pivotally supported by pins 6 so as to be capable of being opened and closed. On the internal surface of the clamp 5, a large-diameter portion 5L and a small-diameter portion 5S are formed. When the MM
rod 1A is used, the large-diameter portion 5L holds a portion of the sleeve 2, and when the MF rod 1B is used, the large-diameter portion 5L holdsaninternallythreaded portion 1BL having a larger diameter.
This rod clamping device 4 not only clamps the sleeve 2 so as to prevent the rotation of the sleeve 2, but also easily positions the drill rod 1 by a diameter difference between the large-diameter portion 5L and the small-diameter portion 5S of the clamp 5.
Also, for a fan cut drill, a down-the-hole drill, and the like, a tube rod 1C as shown in Figure 9 (c) has been devised and used. This tube rod 1C is provided with external threads MS at one end and internal threads FS at the other end, and has a larger outside diameter than the MM rod 1A and the MF
rod 1B, and the outside diameter of the tube rod 1C is approximately equal to the bore diameter. Therefore, a bore bend at the time when a long hole is bored is reduced, and the cuttings discharge efficiency can be improved.
When such a tube rod 1C is used, a rod clamping device 40 as shown in Figures 12 and 13 is provided for the fan cut drill, and a double clamp type rod clamping device 50 as shown in Figures 14 and 15 is provided for the down-the-hole drill.
The rod clamping device 40 shown in Figures 12 and 13 is constructed so that the drill rod 1 having a particular diameter is clamped by a pair of clamps 45 pivotally supported by pins 46 so as to be capable of being opened and closed.
The inside diameter of the clamp 45 is constant, and there is formed no diameter difference.
The rod clamping device 50 shown in Figures 14 and 15 is constructed so that clamps 55 are opened and closed by right and left clamping cylinders 56, by which the drill rod 1 having a particular diameter is Clamped. The inside diameter of the clamp 55 is constant, and there is formed no diameter difference.
If the tube rod 1C is used as the drill rod 1 to reduce a bore bend, since a rod clamping device of a type such that the clamp 45, 55 has no diameter di fference as in the rod clamping device 40 shown in Figure 12 and the rod clamping device 50 shown in Figure 14 is used, the positioning of the drill rod 1 is unstable, so that the work time increases significantly, and also danger in the connection and recovery work for drill rod increases.
Further, for the hydraulic crawler drill 11, if the tube rod 1C is used as the drill rod 1, the rod clamping device 4 shown in Figure 10 cannot be used as it is, and the function of the generally mounted rod changer 19 cannot be fulfilled.
The present invention has been made to solve the above problems with a boring machine, and accordingly an object thereof is to provide a step tube rod which can reduce a bore bend and in which the conventional rod clamping device and rod changer can be used as they are, and the positioning of drill rod is easy to perform, so that connection and recovery work can be performed efficiently and safely, and a boring machine using this step tube rod.
Disclosure of Invention A step tube rod in accordance with the present invention is constructed so that in a drill rod for a boring machine, a rod outside diameter is large so as to be approximately equal to a bore diameter, external threads are provided at one end and internal threads are provided at the other end, and at least one small-diameter portion is formed near an internally threaded portion.
The step tube rod may also be constructed so that a rod outside diameter is large so as to be approximately equal to a bore diameter, external threads are provided at both ends so that the rods are connected via a sleeve, and at least one small-diameter portion is formed near an externally threaded portion.
The above-described step tube rod can reduce a bore bend at the time of boring because the outside diameter thereof is large so as to be approximately equal to the bore diameter.
Also, the small-diameter portion is formed near the internally threaded portion for the step tube rod provided with the external threads at one end and the internal threads at the other end or near the externally threaded portion for the step tube rod provided with the external threads at both ends and connected via the sleeve . Therefore, for the boring machine, the step tube rod can be used as a drill rod merely by slightly modifying the conventional rod clamping device.
For the boring machine using the step tube rod as a drill rod, the drill rod can be positioned easily, so that the connection and recovery work can be performed efficiently and safely.
Feigned striking for loosening a screw of the connected step tube rod is performed after the completion of boring.
However, when screw loosening is insufficient, feigned striking is performed in a state in which the step tube rod is fixed to the rod clamping device.
Therefore, for the step tube rod providedwith the external threads at one end and the internal threads at the other end, it is preferable that the small-diameter portion has an outside diameter which is 90 0 or less of the rod outside diameter and has a length which is 50$ or more of the rod outside diameter.
Also, for the step tube rod provided with the external threads at both ends and connected via the sleeve, it is preferable that the small-diameter portion has an outside diameter which is 90~ or less of the sleeve outside diameter and has a length which is 50~ or more of the sleeve outside diameter.
For the boring machine, in addition to the case where the step tube rod is used for all drill rods, the step tube rod may be used only for the tip-end drill rod. Even in the case where the step tube rod is used only for the tip-end drill rod, a bore bend at the time of boring can be reduced as compared with the case where the conventional drill rod is used.
Brief Description of Drawings Figure 1 is a side view of a hydraulic crawler drill using a step tube rod in accordance with the present invention as a drill rod;
Figure 2 is a construction view of a step tube rod in accordance with one embodiment of the present invention;
Figure 3 is an explanatory view showing a state in which a step tube rod is guided by a rod guide;
Figure 4 is an explanatory view showing a state in which a step tube rod is clamped by a rod clamping device;
Figure 5 is a construction view of a step tube rod in accordance with another embodiment of the present invention;
Figure 6 is an explanatory view showing a state in which a step tube rod is clamped by a rod clamping device;
Figure 7 is a construction view of a step tube rod in accordance with other embodiments of the present invention;
Figure 8 is a side view of a hydraulic crawler drill using a conventional drill rod;
Figure 9 is a construction view of conventional drill rods;
Figure 10 is a construction view of a rod clamping device for a conventional hydraulic crawler drill;
Figure 11 is an explanatory view showing a state in which a conventional drill rod is clamped by a rod clamping device;
Figure 12 is a construction view of a rod clamping device for a conventional fan cut drill;
' Figure 13 is a sectional view taken along the line A-A
of Figure 12;
Figure 14 is a construction view of a rod clamping device for a conventional down-the-hole drill; and Figure 15 is a sectional view taken along the line B-B
of Figure 14.
Best Mode for Carrying out the Invention Figure 1 is a side view of a hydraulic crawler drill using a step tube rod in accordance with the present invention as a drill rod, Figure 2 is a construction view of a step tube rod in accordance with one embodiment of the present invention, Figure 3 is an explanatory view showing a state in which the _ g _ step tube rod is guided by a rod guide, and Figure 4 is an explanatory view showing a state in which the step tube rod is clamped by a rod clamping device.
The construction of a hydraulic crawler drill 10 shown in Figure 1 is basically the same as that of the conventional hydraulic crawler drill 11 shown in Figure 8. Therefore, description is given by applying the same reference numeral to the same element.
In this hydraulic crawler drill 10 as well, a boom 14 is provided on a carriage 13 provided with a track frame 12 so as to be turnable and tiltable. At the distal end of the boom 14 is supported a guide shell 16 mounted with a rock drill so as to be capable of tilting and swinging. The rock drill 15 is insertedly mounted with a connected step tube rod 7 as 15 a drill rod, and at the tip end of the step tube rod 7 is installed a bit 3 having an outside diameter approximately equal to a bore diameter Dh.
The rock drill 15 has a blowing mechanism, a rotating mechanism, and a flushing mechanism (not shown). The rock drill i5 is moved longitudinally by a feed force given by a feed motor 17 provided on the guide shell 16, and transmits a blow and rotation to the bit 3 via the step tube rod 7, whereby a rock-bed R is bored. Also, the flushing mechanism supplies compressed air to the tip end of the step tube rod 7 to discharge cuttings. In the tip end portion of the guide shell 16, a hood 18 is provided to cover the bore and to collect cuttings.
In the case where the bore length is great, a plurality of step tube rods 7 are connected successively at the time of boring work. The supply and connection of the step tube rods 7 and the separation and recovery of the step tube rods 7 after the boring work is finished are carried out mechanically by using a rod changer 19.
In the case where the connection and recovery of the step tube rod 7 are carried out, the step tube rod 7 must be clamped so that the central axis of the step tube rod 7 is fixed when the step tube rod 7 is connected or separated, so that a rod clamping device 4 is provided in the vicinity of the tip end portion of the guide shell 16.
Also, in front of the rod clamping device 4, there is provided a rod guide 9 which holds the step tube rod 7 in the center to guide it when clamping by the rod clamping device 4 is released and boring is performed.
The step tube rod 7 has a large rod outside diameter D
that is approximately equal to the bore diameter Dh, and is provided with external threads MS at one end and internal threads FS at the other end. The step tube rods 7 are connected by directly engaging the external threads MS with the internal threads FS . Also, a small-diameter portion 8 is formed near an internally threaded portion.
The small-diameter portion 8 is formed so that the outside diameter d thereof is 90~ or less of the rod outside diameter D and the length L thereof is 50% or more of the rod outside diameter D, that is, d <_ 0.9D, and L >_ 0.5D.
When boring is performed, as shown in Figure 3, the step tube rod 7 is guided by the rod guide 9 and is held in the center of the guide shell 16.
At the time of connection and recovery work, as shown in Figure 4, the step tube rod 7 is clamped by the rod clamping device 4 provided on the guide shell 16 of the hydraulic crawler drill 10.
The rod clamping device 4 is provided with a pair of clamps 5 pivotally supported by pins 6 so as to be capable of being opened and closed. On the internal surface of the clamp 5, a large-diameter portion 5L and a small-diameter portion 5S
are formed, and the large-diameter portion 5L holds the internally threaded portion of the step tube rod 7.
Therefore, the step tube rod 7 is clamped by the rod clamping device 4 so as to be prevented from rotating, and is positioned by a diameter difference between the large-diameter portion 5L and the small-diameter portion 5S
of the clamp 5.
Since the step tube rod 7 has the large outside diameter D approximately equal to the bore diameter Dh, a bore bend occurring at the time of boring is reduced. Also, since the small-diameter portion 8 is formed at the outer periphery near the internally threaded portion, for the hydraulic crawler drill 10, the step tube rod 7 can be used as a drill rod merely by slightly modifying the conventional rod clamping device.
For the hydraulic crawler drill 10 using the step tube rod 7 as a drill rod, the step tube rod 7 can be positioned easily, so that the connection and recovery work can be performed efficiently and safely.
Since the outside diameter d of the small-diameter portion 8 is 90~ or less of the rod outside diameter D and the length L thereof is 50~ or more of the rod outside diameter D, when screw loosening is insufficient, feigned striking can be performed without trouble in a state in which the step tube rod 7 is fixed to the rod clamping device 4.
Figure 5 is a construction view of a step tube rod in accordance with another embodiment of the present invention, and Figure 6 is an explanatory view showing a state in which the step tube rod is clamped by a rod clamping device.
This step tube rod 7 has a large rod outside diameter D that is approximately equal to the bore diameter Dh, and is provided with external threads MS at both ends. The step tube rods 7 are connected via a sleeve 2 provided with internal threads FS on the inside . The outside diameter Ds of the sleeve 2 is equal to the rod outside diameter D.
Also, a small-diameter portion 8 is formed near an externally threaded portion. The small-diameter portion 8 is formed so that the outside diameter d thereof is 900 or less of the sleeve outside diameter Ds and the length L thereof is 500 or more of the sleeve outside diameter Ds, that is, d <_ 0.9Ds, and L >_ 0.5Ds.
The step tube rod 7 can be formed into shapes shown in Figures 7 (a) and 7 (b) .
At the time of connection and recovery work, as shown in Figure 6, the step tube rod 7 is clamped by a rod clamping device 4 provided on a guide shell 16 of the hydraulic crawler drill 10.
The rod clamping device 4 is providedwith a pair of clamps 5 pivotally supported by pins 6 so as to be capable of being opened and closed. On the internal surface of the clamp 5, a large-diameter portion 5L and a small-diameter portion 5S
are formed, and the large-diameter portion 5L holds a portion of the sleeve 2.
Therefore, the step tube rod 7 and the sleeve 2 are clamped by the rod clamping device 4 so as to be prevented from rotating, and are positioned by a diameter difference between the large-diameter portion 5L and the small-diameter portion 5S
of the clamp 5.
Since the step tube rod 7 has the large outside diameter D approximately equal to the bore diameter Dh, a bore bend occurring at the time of boring is reduced. Also, since the small-diameter portion 8 is formed near an externally threaded portion, for the hydraulic crawler drill 10, the step tube rod 7 can be used as a drill rod merely by slightly modifying the conventional rod clamping device.
For the hydraulic crawler drill 10 using the step tube rod ? as a drill rod, the step tube rod 7 can be positioned easily, so that the connection and recovery work can be performed efficiently and safely.
Since the outside diameter d of the small-diameter portion 8 is 90~ or less of the sleeve outside diameter Ds and the length L thereof is 50~ or more of the sleeve outside diameter Ds, when screw loosening is insufficient, feigned striking can be performed without trouble in a state in which the step tube rod 7 is fixed to the rod clamping device 4.
For the hydraulic crawler drill 10, in addition to the case where the step tube rod 7 is used for all drill rods, the step tube rod 7 may be used only for the tip-end drill rod. Even in the case where the step tube rod 7 is used only for the tip-end drill rod, a bore bend at the time of boring can be reduced as compared with the case where the conventional drill rod 1 is used.
Industrial Applicability As described above, for the step tube rod in accordance with the present invention, a bore bend at the time of boring can be reduced. Also, the small-diameter portion is formed near the internally threaded portion for the step tube rod provided with the external threads at one end and the internal threads at the other end or near the externally threaded portion for the step tube rod provided with the external threads at both ends and connected via the sleeve. Therefore, for this boring machine, the step tube rod can be used as a drill rod merely by slightly modifying the conventional rod clamping device.
For the boring machine using the step tube rod as a drill rod, the drill rod can be positioned easily, so that the connection and recovery work can be performed efficiently and safely.
provided with external threads MS at both ends as shown in Figure 9 (a) , and an MF rod 1B which is provided with external threads MS at one end and the other end of which has a larger diameter and is provided with internal threads FS on the inside as shown in Figure 9(b). When the MM rod 1A is used, it is connected via a sleeve 2, and when the MF rod 1B is used, the external threads MS and the internal threads FS are engaged directly with each other.
As shown in Figures 10 and 11, the rod clamping device 4 is constructed so that the drill rod 1 having a particular diameter is clamped by a pair of clamps 5 pivotally supported by pins 6 so as to be capable of being opened and closed. On the internal surface of the clamp 5, a large-diameter portion 5L and a small-diameter portion 5S are formed. When the MM
rod 1A is used, the large-diameter portion 5L holds a portion of the sleeve 2, and when the MF rod 1B is used, the large-diameter portion 5L holdsaninternallythreaded portion 1BL having a larger diameter.
This rod clamping device 4 not only clamps the sleeve 2 so as to prevent the rotation of the sleeve 2, but also easily positions the drill rod 1 by a diameter difference between the large-diameter portion 5L and the small-diameter portion 5S of the clamp 5.
Also, for a fan cut drill, a down-the-hole drill, and the like, a tube rod 1C as shown in Figure 9 (c) has been devised and used. This tube rod 1C is provided with external threads MS at one end and internal threads FS at the other end, and has a larger outside diameter than the MM rod 1A and the MF
rod 1B, and the outside diameter of the tube rod 1C is approximately equal to the bore diameter. Therefore, a bore bend at the time when a long hole is bored is reduced, and the cuttings discharge efficiency can be improved.
When such a tube rod 1C is used, a rod clamping device 40 as shown in Figures 12 and 13 is provided for the fan cut drill, and a double clamp type rod clamping device 50 as shown in Figures 14 and 15 is provided for the down-the-hole drill.
The rod clamping device 40 shown in Figures 12 and 13 is constructed so that the drill rod 1 having a particular diameter is clamped by a pair of clamps 45 pivotally supported by pins 46 so as to be capable of being opened and closed.
The inside diameter of the clamp 45 is constant, and there is formed no diameter difference.
The rod clamping device 50 shown in Figures 14 and 15 is constructed so that clamps 55 are opened and closed by right and left clamping cylinders 56, by which the drill rod 1 having a particular diameter is Clamped. The inside diameter of the clamp 55 is constant, and there is formed no diameter difference.
If the tube rod 1C is used as the drill rod 1 to reduce a bore bend, since a rod clamping device of a type such that the clamp 45, 55 has no diameter di fference as in the rod clamping device 40 shown in Figure 12 and the rod clamping device 50 shown in Figure 14 is used, the positioning of the drill rod 1 is unstable, so that the work time increases significantly, and also danger in the connection and recovery work for drill rod increases.
Further, for the hydraulic crawler drill 11, if the tube rod 1C is used as the drill rod 1, the rod clamping device 4 shown in Figure 10 cannot be used as it is, and the function of the generally mounted rod changer 19 cannot be fulfilled.
The present invention has been made to solve the above problems with a boring machine, and accordingly an object thereof is to provide a step tube rod which can reduce a bore bend and in which the conventional rod clamping device and rod changer can be used as they are, and the positioning of drill rod is easy to perform, so that connection and recovery work can be performed efficiently and safely, and a boring machine using this step tube rod.
Disclosure of Invention A step tube rod in accordance with the present invention is constructed so that in a drill rod for a boring machine, a rod outside diameter is large so as to be approximately equal to a bore diameter, external threads are provided at one end and internal threads are provided at the other end, and at least one small-diameter portion is formed near an internally threaded portion.
The step tube rod may also be constructed so that a rod outside diameter is large so as to be approximately equal to a bore diameter, external threads are provided at both ends so that the rods are connected via a sleeve, and at least one small-diameter portion is formed near an externally threaded portion.
The above-described step tube rod can reduce a bore bend at the time of boring because the outside diameter thereof is large so as to be approximately equal to the bore diameter.
Also, the small-diameter portion is formed near the internally threaded portion for the step tube rod provided with the external threads at one end and the internal threads at the other end or near the externally threaded portion for the step tube rod provided with the external threads at both ends and connected via the sleeve . Therefore, for the boring machine, the step tube rod can be used as a drill rod merely by slightly modifying the conventional rod clamping device.
For the boring machine using the step tube rod as a drill rod, the drill rod can be positioned easily, so that the connection and recovery work can be performed efficiently and safely.
Feigned striking for loosening a screw of the connected step tube rod is performed after the completion of boring.
However, when screw loosening is insufficient, feigned striking is performed in a state in which the step tube rod is fixed to the rod clamping device.
Therefore, for the step tube rod providedwith the external threads at one end and the internal threads at the other end, it is preferable that the small-diameter portion has an outside diameter which is 90 0 or less of the rod outside diameter and has a length which is 50$ or more of the rod outside diameter.
Also, for the step tube rod provided with the external threads at both ends and connected via the sleeve, it is preferable that the small-diameter portion has an outside diameter which is 90~ or less of the sleeve outside diameter and has a length which is 50~ or more of the sleeve outside diameter.
For the boring machine, in addition to the case where the step tube rod is used for all drill rods, the step tube rod may be used only for the tip-end drill rod. Even in the case where the step tube rod is used only for the tip-end drill rod, a bore bend at the time of boring can be reduced as compared with the case where the conventional drill rod is used.
Brief Description of Drawings Figure 1 is a side view of a hydraulic crawler drill using a step tube rod in accordance with the present invention as a drill rod;
Figure 2 is a construction view of a step tube rod in accordance with one embodiment of the present invention;
Figure 3 is an explanatory view showing a state in which a step tube rod is guided by a rod guide;
Figure 4 is an explanatory view showing a state in which a step tube rod is clamped by a rod clamping device;
Figure 5 is a construction view of a step tube rod in accordance with another embodiment of the present invention;
Figure 6 is an explanatory view showing a state in which a step tube rod is clamped by a rod clamping device;
Figure 7 is a construction view of a step tube rod in accordance with other embodiments of the present invention;
Figure 8 is a side view of a hydraulic crawler drill using a conventional drill rod;
Figure 9 is a construction view of conventional drill rods;
Figure 10 is a construction view of a rod clamping device for a conventional hydraulic crawler drill;
Figure 11 is an explanatory view showing a state in which a conventional drill rod is clamped by a rod clamping device;
Figure 12 is a construction view of a rod clamping device for a conventional fan cut drill;
' Figure 13 is a sectional view taken along the line A-A
of Figure 12;
Figure 14 is a construction view of a rod clamping device for a conventional down-the-hole drill; and Figure 15 is a sectional view taken along the line B-B
of Figure 14.
Best Mode for Carrying out the Invention Figure 1 is a side view of a hydraulic crawler drill using a step tube rod in accordance with the present invention as a drill rod, Figure 2 is a construction view of a step tube rod in accordance with one embodiment of the present invention, Figure 3 is an explanatory view showing a state in which the _ g _ step tube rod is guided by a rod guide, and Figure 4 is an explanatory view showing a state in which the step tube rod is clamped by a rod clamping device.
The construction of a hydraulic crawler drill 10 shown in Figure 1 is basically the same as that of the conventional hydraulic crawler drill 11 shown in Figure 8. Therefore, description is given by applying the same reference numeral to the same element.
In this hydraulic crawler drill 10 as well, a boom 14 is provided on a carriage 13 provided with a track frame 12 so as to be turnable and tiltable. At the distal end of the boom 14 is supported a guide shell 16 mounted with a rock drill so as to be capable of tilting and swinging. The rock drill 15 is insertedly mounted with a connected step tube rod 7 as 15 a drill rod, and at the tip end of the step tube rod 7 is installed a bit 3 having an outside diameter approximately equal to a bore diameter Dh.
The rock drill 15 has a blowing mechanism, a rotating mechanism, and a flushing mechanism (not shown). The rock drill i5 is moved longitudinally by a feed force given by a feed motor 17 provided on the guide shell 16, and transmits a blow and rotation to the bit 3 via the step tube rod 7, whereby a rock-bed R is bored. Also, the flushing mechanism supplies compressed air to the tip end of the step tube rod 7 to discharge cuttings. In the tip end portion of the guide shell 16, a hood 18 is provided to cover the bore and to collect cuttings.
In the case where the bore length is great, a plurality of step tube rods 7 are connected successively at the time of boring work. The supply and connection of the step tube rods 7 and the separation and recovery of the step tube rods 7 after the boring work is finished are carried out mechanically by using a rod changer 19.
In the case where the connection and recovery of the step tube rod 7 are carried out, the step tube rod 7 must be clamped so that the central axis of the step tube rod 7 is fixed when the step tube rod 7 is connected or separated, so that a rod clamping device 4 is provided in the vicinity of the tip end portion of the guide shell 16.
Also, in front of the rod clamping device 4, there is provided a rod guide 9 which holds the step tube rod 7 in the center to guide it when clamping by the rod clamping device 4 is released and boring is performed.
The step tube rod 7 has a large rod outside diameter D
that is approximately equal to the bore diameter Dh, and is provided with external threads MS at one end and internal threads FS at the other end. The step tube rods 7 are connected by directly engaging the external threads MS with the internal threads FS . Also, a small-diameter portion 8 is formed near an internally threaded portion.
The small-diameter portion 8 is formed so that the outside diameter d thereof is 90~ or less of the rod outside diameter D and the length L thereof is 50% or more of the rod outside diameter D, that is, d <_ 0.9D, and L >_ 0.5D.
When boring is performed, as shown in Figure 3, the step tube rod 7 is guided by the rod guide 9 and is held in the center of the guide shell 16.
At the time of connection and recovery work, as shown in Figure 4, the step tube rod 7 is clamped by the rod clamping device 4 provided on the guide shell 16 of the hydraulic crawler drill 10.
The rod clamping device 4 is provided with a pair of clamps 5 pivotally supported by pins 6 so as to be capable of being opened and closed. On the internal surface of the clamp 5, a large-diameter portion 5L and a small-diameter portion 5S
are formed, and the large-diameter portion 5L holds the internally threaded portion of the step tube rod 7.
Therefore, the step tube rod 7 is clamped by the rod clamping device 4 so as to be prevented from rotating, and is positioned by a diameter difference between the large-diameter portion 5L and the small-diameter portion 5S
of the clamp 5.
Since the step tube rod 7 has the large outside diameter D approximately equal to the bore diameter Dh, a bore bend occurring at the time of boring is reduced. Also, since the small-diameter portion 8 is formed at the outer periphery near the internally threaded portion, for the hydraulic crawler drill 10, the step tube rod 7 can be used as a drill rod merely by slightly modifying the conventional rod clamping device.
For the hydraulic crawler drill 10 using the step tube rod 7 as a drill rod, the step tube rod 7 can be positioned easily, so that the connection and recovery work can be performed efficiently and safely.
Since the outside diameter d of the small-diameter portion 8 is 90~ or less of the rod outside diameter D and the length L thereof is 50~ or more of the rod outside diameter D, when screw loosening is insufficient, feigned striking can be performed without trouble in a state in which the step tube rod 7 is fixed to the rod clamping device 4.
Figure 5 is a construction view of a step tube rod in accordance with another embodiment of the present invention, and Figure 6 is an explanatory view showing a state in which the step tube rod is clamped by a rod clamping device.
This step tube rod 7 has a large rod outside diameter D that is approximately equal to the bore diameter Dh, and is provided with external threads MS at both ends. The step tube rods 7 are connected via a sleeve 2 provided with internal threads FS on the inside . The outside diameter Ds of the sleeve 2 is equal to the rod outside diameter D.
Also, a small-diameter portion 8 is formed near an externally threaded portion. The small-diameter portion 8 is formed so that the outside diameter d thereof is 900 or less of the sleeve outside diameter Ds and the length L thereof is 500 or more of the sleeve outside diameter Ds, that is, d <_ 0.9Ds, and L >_ 0.5Ds.
The step tube rod 7 can be formed into shapes shown in Figures 7 (a) and 7 (b) .
At the time of connection and recovery work, as shown in Figure 6, the step tube rod 7 is clamped by a rod clamping device 4 provided on a guide shell 16 of the hydraulic crawler drill 10.
The rod clamping device 4 is providedwith a pair of clamps 5 pivotally supported by pins 6 so as to be capable of being opened and closed. On the internal surface of the clamp 5, a large-diameter portion 5L and a small-diameter portion 5S
are formed, and the large-diameter portion 5L holds a portion of the sleeve 2.
Therefore, the step tube rod 7 and the sleeve 2 are clamped by the rod clamping device 4 so as to be prevented from rotating, and are positioned by a diameter difference between the large-diameter portion 5L and the small-diameter portion 5S
of the clamp 5.
Since the step tube rod 7 has the large outside diameter D approximately equal to the bore diameter Dh, a bore bend occurring at the time of boring is reduced. Also, since the small-diameter portion 8 is formed near an externally threaded portion, for the hydraulic crawler drill 10, the step tube rod 7 can be used as a drill rod merely by slightly modifying the conventional rod clamping device.
For the hydraulic crawler drill 10 using the step tube rod ? as a drill rod, the step tube rod 7 can be positioned easily, so that the connection and recovery work can be performed efficiently and safely.
Since the outside diameter d of the small-diameter portion 8 is 90~ or less of the sleeve outside diameter Ds and the length L thereof is 50~ or more of the sleeve outside diameter Ds, when screw loosening is insufficient, feigned striking can be performed without trouble in a state in which the step tube rod 7 is fixed to the rod clamping device 4.
For the hydraulic crawler drill 10, in addition to the case where the step tube rod 7 is used for all drill rods, the step tube rod 7 may be used only for the tip-end drill rod. Even in the case where the step tube rod 7 is used only for the tip-end drill rod, a bore bend at the time of boring can be reduced as compared with the case where the conventional drill rod 1 is used.
Industrial Applicability As described above, for the step tube rod in accordance with the present invention, a bore bend at the time of boring can be reduced. Also, the small-diameter portion is formed near the internally threaded portion for the step tube rod provided with the external threads at one end and the internal threads at the other end or near the externally threaded portion for the step tube rod provided with the external threads at both ends and connected via the sleeve. Therefore, for this boring machine, the step tube rod can be used as a drill rod merely by slightly modifying the conventional rod clamping device.
For the boring machine using the step tube rod as a drill rod, the drill rod can be positioned easily, so that the connection and recovery work can be performed efficiently and safely.
Claims (6)
1. A step tube rod characterized in that in a drill rod for a boring machine, a rod outside diameter is large so as to be approximately equal to a bore diameter, external threads are provided at one end and internal threads are provided at the other end, and at least one small-diameter portion is formed near an internally threaded portion.
2. The step tube rod according to claim 1, characterized in that the small-diameter portion has an outside diameter which is 90% or less of the rod outside diameter and has a length which is 50% or more of the rod outside diameter.
3. A step tube rod characterized in that in a drill rod for a boring machine, a rod outside diameter is large so as to be approximately equal to a bore diameter, external threads are provided at both ends so that the rods are connected via a sleeve, and at least one small-diameter portion is formed near an externally threaded portion.
4. The step tube rod according to claim 3, characterized in that the small-diameter portion has an outside diameter which is 90 % or less of the sleeve outside diameter and has a length which is 50% or more of the sleeve outside diameter.
5. A boring machine characterized by using the step tube rod according to claim 1, 2, 3 or 4 as a drill rod.
6. The boring machine according to claim 5, characterized by using the step tube rod for a tip-end drill rod.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001130084 | 2001-04-26 | ||
| JP2001-130085 | 2001-04-26 | ||
| JP2001130085 | 2001-04-26 | ||
| JP2001-130084 | 2001-04-26 | ||
| PCT/JP2002/004149 WO2002088511A1 (en) | 2001-04-26 | 2002-04-25 | Step tube rod, and drilling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2411253A1 true CA2411253A1 (en) | 2002-10-28 |
Family
ID=26614309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002411253A Abandoned CA2411253A1 (en) | 2001-04-26 | 2002-04-25 | Step tube rod, and drilling machine |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20030132035A1 (en) |
| EP (1) | EP1382794A4 (en) |
| JP (1) | JPWO2002088511A1 (en) |
| KR (1) | KR20040002377A (en) |
| CN (1) | CN1460145A (en) |
| CA (1) | CA2411253A1 (en) |
| WO (1) | WO2002088511A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117127912A (en) * | 2023-10-23 | 2023-11-28 | 烟台兴业机械股份有限公司 | Rock drilling trolley |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619478B (en) * | 2012-04-18 | 2014-09-03 | 江苏省无锡探矿机械总厂有限公司 | Clamp type hoisting mechanism |
| PL2868860T3 (en) * | 2013-09-09 | 2016-06-30 | Sandvik Intellectual Property | Drill string component |
| CN104018811B (en) * | 2014-05-27 | 2016-07-06 | 鞍钢集团矿业公司 | A kind of upright opening drill hole of drilling machine operation is led slag forming device and leads slag forming method |
| CN110424899B (en) * | 2019-09-02 | 2024-05-10 | 三门峡丽源环保工程设备有限公司 | Telescopic drill rod and cleaning device for same |
| CN116122747B (en) * | 2023-02-10 | 2023-09-05 | 广东有色工程勘察设计院 | Drilling device and drilling method thereof |
Family Cites Families (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1895901A (en) * | 1932-04-09 | 1933-01-31 | Raymond Concrete Pile Co | Kelly bar |
| US2051998A (en) * | 1935-05-08 | 1936-08-25 | Monroe Verne | Drive clamp |
| US2969845A (en) * | 1959-01-23 | 1961-01-31 | Dewey S Hester | Drill pipe saving device |
| US3080179A (en) * | 1959-10-06 | 1963-03-05 | Huntsinger Associates | Slip engaging portion of drill string formed of increased wall thickness and reduced hardness |
| BE757087A (en) * | 1969-12-03 | 1971-04-06 | Gardner Denver Co | REMOTELY CONTROLLED DRILL ROD UNSCREWING MECHANISM |
| SE341169B (en) * | 1970-06-15 | 1971-12-20 | Atlas Copco Ab | |
| US3730286A (en) * | 1972-06-29 | 1973-05-01 | Exxon Production Research Co | Apparatus for improving rotary drilling operations |
| US4076436A (en) * | 1975-01-06 | 1978-02-28 | Bowen Tools, Inc. | Stress relieved tool elements |
| US4030542A (en) * | 1975-10-02 | 1977-06-21 | Ingersoll-Rand Company | Drill string make-up and break-out mechanism |
| US4128135A (en) * | 1977-07-13 | 1978-12-05 | Gardner-Denver Company | Drill pipe handling mechanism |
| US4416476A (en) * | 1980-09-17 | 1983-11-22 | Oncor Corporation | Intermediate weight drill stem member |
| US4460202A (en) * | 1980-11-26 | 1984-07-17 | Chance Glenn G | Intermediate weight drill string member |
| JPS6036489U (en) * | 1983-08-15 | 1985-03-13 | 大同特殊鋼株式会社 | Intermediate rod for rock drill |
| US4771811A (en) * | 1984-04-20 | 1988-09-20 | Lor, Inc. | Heavy wall drill pipe and method of manufacture of heavy wall drill pipe |
| US4760889A (en) * | 1986-09-19 | 1988-08-02 | Dudman Roy L | High bending strength ratio drill string components |
| US4811800A (en) * | 1987-10-22 | 1989-03-14 | Homco International Inc. | Flexible drill string member especially for use in directional drilling |
| US4987961A (en) * | 1990-01-04 | 1991-01-29 | Mcneely Jr Branch M | Drill stem arrangement and method |
| US5040622A (en) * | 1990-05-16 | 1991-08-20 | Shaw Industries Ltd. | Variable depth grooved drill string member |
| WO1993000500A2 (en) * | 1991-06-25 | 1993-01-07 | Shaw Industries Ltd. | Variable depth grooved drill string member |
| DE4127249C1 (en) * | 1991-08-17 | 1993-02-04 | Gd-Anker Gmbh, 3370 Seesen, De | |
| JPH082223Y2 (en) * | 1992-06-04 | 1996-01-24 | 株式会社樋口技工 | Perforator coupling |
| US5653297A (en) * | 1995-04-14 | 1997-08-05 | Harnischfeger Corporation | Blasthole drill with improved automatic breakout wrench |
| US5762150A (en) * | 1996-09-06 | 1998-06-09 | Ingersoll-Rand Company | Drill rod changer assembly |
| US5950739A (en) * | 1997-09-05 | 1999-09-14 | Lafontaine; Stephen J. | Earth piercing apparatus |
| US6012744A (en) * | 1998-05-01 | 2000-01-11 | Grant Prideco, Inc. | Heavy weight drill pipe |
| SE516730C2 (en) * | 2000-10-27 | 2002-02-19 | Sandvik Ab | Guide tubes for mechanical handling in a rig for rock drilling and drill string for mechanical handling |
-
2002
- 2002-04-25 EP EP02720600A patent/EP1382794A4/en not_active Withdrawn
- 2002-04-25 CA CA002411253A patent/CA2411253A1/en not_active Abandoned
- 2002-04-25 CN CN02800916A patent/CN1460145A/en active Pending
- 2002-04-25 US US10/276,763 patent/US20030132035A1/en not_active Abandoned
- 2002-04-25 KR KR1020027014169A patent/KR20040002377A/en not_active Application Discontinuation
- 2002-04-25 WO PCT/JP2002/004149 patent/WO2002088511A1/en not_active Application Discontinuation
- 2002-04-25 JP JP2002585777A patent/JPWO2002088511A1/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117127912A (en) * | 2023-10-23 | 2023-11-28 | 烟台兴业机械股份有限公司 | Rock drilling trolley |
| CN117127912B (en) * | 2023-10-23 | 2024-01-26 | 烟台兴业机械股份有限公司 | Rock drilling trolley |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1460145A (en) | 2003-12-03 |
| JPWO2002088511A1 (en) | 2004-08-19 |
| EP1382794A4 (en) | 2005-07-20 |
| EP1382794A1 (en) | 2004-01-21 |
| WO2002088511A1 (en) | 2002-11-07 |
| KR20040002377A (en) | 2004-01-07 |
| US20030132035A1 (en) | 2003-07-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |