TWI752413B - Drilling device - Google Patents

Abstract

An earth-boring device includes a drill bit, a shaft body, a driver, a riser and an outer casing. The shaft body is connected to the drill bit. The driver is connected to the shaft body, drives the shaft body to rotate and drives the drill bit to rotate. The standpipe is sleeved on the shaft body and linked with the axle body. The standpipe includes the pipe body and a plurality of first protruding ribs. The first protruding ribs are arranged on the outer peripheral wall of the pipe body and extend along the axial direction of the pipe body. The drill bit is adjacent to the shaft. on the end edge of the tube. The outer casing is sleeved on the riser and the drill bit, and there is a distance between the inner peripheral wall of the outer casing and the outer peripheral wall of the riser.

Description

Drilling device

The present invention relates to a kind of civil engineering equipment, in particular to a ground drilling device.

In the engineering operations of civil engineering, in order to construct the stability of the entire building or structure, foundation works are usually carried out first. In some buildings with large loads, pile foundations are usually used as their foundation works. In addition to directly driving the piles into the ground, the foundation engineering of the pile foundation can also use ground drilling equipment to drill holes in the ground, then place steel cages in the ground holes, and then pour concrete into the ground holes to form the foundation piles. .

A drill bit is arranged on the front end of the drill pipe in the existing ground drilling equipment, and the outer surface of the drill pipe is a smooth surface. After the engine or motor of the ground drilling equipment is started, the drill pipe is rotated, and the drill bit is driven to rotate at the same time. At the same time, high-pressure air is ejected from the drill pipe. , the high-pressure air can send out the soil and stone broken by the drill bit along the ground hole, as disclosed in the national patent M425892.

However, the ground drilling tool of the domestic patent M425892, because the hole diameter of the ground hole is related to the diameter of the drill bit, the high-pressure air is sprayed from the drill pipe and transported along the space between the hole wall of the ground hole and the drill pipe, and the soil and rock are transported to the ground. Because the space between the hole wall of the ground hole and the drill pipe is too large, when the high-pressure air flows in it, the speed of the air is slow, and the force of pushing the soil and rock is reduced, so the soil and rock cannot be transported to the ground, and the soil and rock are easily blocked in the ground. in the hole. In addition, the soil and rock on the hole wall of the ground hole are easily impacted by the moving soil and rock and collapse during the high-pressure air conveying the soil and rock, which also causes the problem of the soil and rock stuck in the ground hole.

In view of this, the purpose of the present invention is to provide a ground drilling device, which can maintain a predetermined speed when the high-pressure air passes through the space between the raised ribs by arranging the protruding ribs on the outer peripheral wall of the riser, so that the soil and rock can be moved smoothly. It is transported to the ground, and an outer casing is set on the periphery of the riser, which can support the hole wall of the ground hole as the drill bit descends, and prevent soil and rock from falling.

An embodiment of the ground-boring device of the present invention includes a drill bit, a shaft, a driver, a riser, and an outer casing. The shaft body is connected to the drill bit. The driver is connected to the shaft body, drives the shaft body to rotate and drives the drill bit to rotate. The standpipe is sleeved on the shaft body and linked with the axle body. The standpipe includes the pipe body and a plurality of first protruding ribs. The first protruding ribs are arranged on the outer peripheral wall of the pipe body and extend along the axial direction of the pipe body. The drill bit is adjacent to the shaft. on the end edge of the tube. The outer casing is sleeved on the riser and the drill bit, and there is a distance between the inner peripheral wall of the outer casing and the outer peripheral wall of the riser.

In another embodiment, the first protruding ribs are arranged at equal intervals from each other.

In another embodiment, each first protruding rib has a first top surface, the first top surface is disposed opposite to the outer peripheral wall of the pipe body, and there is a first gap between the inner peripheral wall of the outer sleeve and the first top surface.

In another embodiment, the interval between at least two adjacent first protruding ribs is different from the interval between other first protruding ribs.

In another embodiment, the riser further includes a plurality of second protruding ribs, the second protruding ribs are disposed on the outer peripheral wall of the tubular body and extend along the axial direction of the tubular body, the second protruding ribs and the first protruding ribs A protruding rib is staggered with each other.

In another embodiment, each of the second protruding ribs and the adjacent first protruding ribs have equal intervals.

In another embodiment, the lengths of the second protruding ribs are smaller than the lengths of the first protruding ribs.

In another embodiment, the cross-section of each of the first protruding ribs is rectangular, and the cross-section of each of the second protruding ribs is trapezoidal.

In another embodiment, the ratio of the length of the first protruding ribs to the length of the tube body is R1, wherein 0.8≦R1≦1.

In another embodiment, the ratio of the length of the first protruding ribs to the length of the tube body is R1=0.9.

In another embodiment, the ratio of the length of the second protruding ribs to the length of the tube body is R2, wherein 0.05≦R2≦0.15.

In another embodiment, the ratio of the length of the second protruding ribs to the length of the tube body is R2=0.1.

In another embodiment, each of the first protruding ribs has a first top surface, each of the second protruding ribs has a second top surface, and the first top surface and the second top surface are spaced from the tube body. The first top surface and the inner peripheral wall of the outer sleeve have a first gap, the second top surface and the inner peripheral wall of the outer sleeve have a second gap, and the width of the second gap is smaller than the width of the first gap.

In another embodiment, the first gap has a first gap width D1, wherein 2cm≦D1≦8cm.

In another embodiment, 4cm≦D1≦6cm.

In another embodiment, D1=5cm.

In another embodiment, the second gap has a second gap width D2, wherein 1cm≦D2≦5cm.

In another embodiment, 2cm≦D2≦4cm.

In another embodiment, D2=3cm.

In another embodiment, there is an air flow channel between the pipe body and the shaft body, and an exhaust gap is formed between the drill bit and the end edge of the pipe body, and the gas is discharged to the space between the pipe body and the outer casing through the air flow channel and the exhaust gap. spacing.

In the ground drilling device of the present invention, a first convex rib is arranged on the outer peripheral wall of the riser, thereby accelerating the speed of the air flow, preventing soil and stone from being blocked between the riser and the outer casing, and the first convex rib provides shearing force, allowing the The soil is broken. The outer casing can support the hole wall of the ground hole, so as to avoid the hole wall collapsing when the convex stone hits the hole wall when moving.

Please refer to FIG. 1 , FIG. 2 and FIG. 3 , which illustrate an embodiment of the ground boring device of the present invention. The ground drilling device 100 of the present invention includes a drill bit 10 , a shaft body 20 , a driver 30 , a riser 40 and an outer casing 50 . The shaft body 20 is connected to the drill bit 10 . The driver 30 is connected to the shaft body 20 , which drives the shaft body 20 to rotate and drives the drill bit 10 to rotate. The standpipe 40 is sleeved on the shaft body 20 and linked with the axle body 20 . The standpipe 40 includes a pipe body 41 and a plurality of first protruding ribs 42 . The axial extension of the drill bit 10 is adjacent to the end edge of the pipe body 41 . The outer casing 50 is sleeved on the riser 40 and the drill bit 10 , and there is a distance d between the inner peripheral wall 51 of the outer casing 50 and the outer peripheral wall 411 of the pipe body 41 .

The ground boring device 100 of the present invention may be movable or fixed. The shaft body 20 is connected to the driver 30 via the joint 21 . The driver 30 may be an electric motor or an engine, and a device capable of outputting torque to drive the shaft body 20 to rotate may be used, and is not limited. The drill bit 10 is disposed at one end of the shaft body 20 and has a plurality of blade portions 11 , and the blade portions 11 can scoop up earth and stone and move the earth and stone upward along the grooves 12 between the blade portions 11 .

As shown in FIG. 2 and FIG. 3 , the standpipe 40 is disposed outside the shaft body 20 and is disposed around the axle body 20 , a gap is formed between the standpipe 40 and the axle body 20 , and the gap forms a flow passage for the pressurized air . The riser 40 can be coaxially arranged with the shaft body 20, and the riser 40 is connected to the joint 21 of the shaft body 20, so the riser 40 can rotate synchronously with the shaft body 20, that is, the riser 40 can rotate synchronously with the drill bit 10 . The standpipe 40 includes a pipe body 41 and a plurality of first protruding ribs 42 . As shown in FIG. 4 , in this embodiment, the tube body 41 is a circular tube, and the first protruding ribs 42 are installed on the outer peripheral wall 411 of the tube body 41 and extend along the axial direction of the tube body 41 . The first protruding rib 42 may be integrally formed with the tube body 41 or combined with the tube body 41 by welding. Please refer to the present embodiment, the two ends of the first protruding rib 42 are respectively adjacent to the two ends of the pipe body 41 . The drill bit 10 is close to one end edge of the pipe body 41 , and an exhaust gap is formed between the drill bit 10 and the end edge of the pipe body 41 . The pressurized air can flow in the direction of the drill bit 10 through the gap between the standpipe 40 and the shaft body 20 , and flow out through the gap between the drill bit 10 and the end edge of the pipe body 41 , and transport the soil and stone shoveled out by the drill bit 10 toward the ground. The outer sleeve 50 is disposed outside the standpipe 40 and surrounds the standpipe 40 . Therefore, after the pressurized air flows out from the exhaust gap between the drill bit 10 and the end edge of the pipe body 41 , the soil and stone shoveled by the drill bit 10 are shoveled along the distance between the inner peripheral wall 51 of the outer casing 50 and the outer peripheral wall 411 of the riser 40 . d is transported up to the ground. The outer casing 50 will move down synchronously as the drill bit 10 is drilled downward, and the diameter of the inner peripheral wall 51 of the outer casing 50 is slightly larger than the diameter of the drill bit 10 , so that the diameter of the outer peripheral wall 52 of the outer casing 50 is approximately equal to the drill bit 10 The diameter of the hole drilled. When the outer casing 50 moves downward with the drill bit 10, the outer casing 50 can be attached to the hole wall of the ground hole and support the hole wall of the ground hole. Moreover, when the earth and rock move up and down with the pressurized air, the outer casing 50 can prevent the moving earth and rock from hitting the hole wall of the earth hole and causing the earth and rock to fall out.

In addition, please refer to FIG. 5 , which shows a cross-section of the standpipe 40 of the present embodiment. As shown, the cross section of the first rib 42 is rectangular. However, the present invention is not limited thereto, and the cross-section of the first protruding rib 42 may also be a semicircle or other shapes. In this embodiment, the first protruding ribs 42 are arranged at equal distances from each other. As shown in FIG. 5 , in this embodiment, eight first protruding ribs 42 are provided on the outer peripheral wall 411 of the tube body 41 . A protruding rib 42 is arranged at a distance of 45 degrees. However, the number of the first protruding ribs 42 can be appropriately set as required, which will be described in detail in the following paragraphs. The inner peripheral wall 51 of the pipe body 41 is smooth.

Please refer to FIG. 6 , each first protruding rib 42 has a first top surface 421 , the first top surface 421 is disposed opposite to the outer peripheral wall 411 of the tube body 41 , and the inner peripheral wall 51 of the outer sleeve 50 is opposite to the first top surface 421 There is a first gap g1 therebetween. The arrangement of the first protruding ribs 42 can reduce the cross-sectional area of the distance d formed between the inner peripheral wall 51 of the outer sleeve 50 and the outer peripheral wall 411 of the riser 40 . According to the principle of fluid mechanics, when the flow rate of pressurized air is a constant value, the flow rate of pressurized air is inversely proportional to the cross-sectional area. The riser 40 of the present invention is provided with the first protruding ribs 42 on the outer peripheral wall 411 of the pipe body 41, so the cross-sectional area between the inner peripheral wall 51 of the outer sleeve 50 and the outer peripheral wall 411 of the riser 40 is reduced, so that when the pressurized air passes through You can increase the speed and smoothly push the soil to the ground. Although more first protruding ribs 42 are provided, the flow rate of the pressurized air can be increased, but too many first protruding ribs 42 will make the distance between adjacent first protruding ribs 42 too small to allow soil and rocks to pass through, even Make soil and rocks clog in the gap. Therefore, the distance between the adjacent first protruding ribs 42 can be a balanced value between the flow rate of the pressurized air and the minimum distance required for the earth and rock to move through.

In addition, since the riser 40 rotates with the shaft body 20, the first protruding ribs 42 can also apply shearing force to the soil and rock moving between the inner peripheral wall 51 of the outer casing 50 and the first top surface 421, so that the soil and rock are broken. into smaller particle sizes.

Please refer to Fig. 7, Fig. 8 and Fig. 9, which illustrate another embodiment of the riser of the present invention. In this embodiment, the interval between at least two adjacent first protruding ribs 42 of the standpipe 40 is different from the interval between other first protruding ribs 42 . As shown in FIG. 8, nine first protruding ribs 42 are provided on the outer peripheral wall 411 of the pipe body 41 of the standpipe 40, among which the first protruding rib 42a and the first protruding rib 42b or the first protruding rib 42a on the upper right The interval with the first rib 42c is smaller than the interval between the first rib 42b and the first rib 42d. The riser 40 of this embodiment is suitable for the occasion of drilling and excavating the river bed. The soil and rock structures of the river bed are different in hardness and softness. Therefore, the first convex rib 42a and the first convex rib 42b or the first convex rib 42a and the first convex rib 42b or the first convex rib 42a and the first convex rib 42b with a small distance can be used A larger shearing force is generated between the ribs 42c, and is used for shearing hard earth-rock structures. The other first protruding ribs 42 with larger intervals can be used for shearing softer earth-rock structures.

Please refer to Figures 10, 11 and 12, which illustrate yet another embodiment of the riser of the present invention. In this embodiment, the standpipe 40 further includes a plurality of second protruding ribs 43 . The second protruding ribs 43 are disposed on the outer peripheral wall 411 of the tubular body 41 and extend along the axial direction of the tubular body 41 . The ribs 42 are staggered with each other. Each second protruding rib 43 and its adjacent first protruding rib 42 have equal intervals. That is, each second rib 43 has the same interval with the adjacent first rib 42 on the left and right sides.

In addition, as shown in FIG. 10 , the length of the second rib 43 is smaller than the length of the first rib 42 . The ratio of the length of the first protruding rib 42 to the length of the tube body 41 is R1, where 0.8≦R1≦1. The optimum value of the ratio of the length of the first protruding rib 42 to the length of the pipe body 41 is R1=0.9. The ratio of the length of the second rib 43 to the length of the tube body 41 is R2, where 0.05≦R2≦0.15. The optimum value of the ratio of the length of the second rib 43 to the length of the tube body 41 is R2=0.1. The second protruding rib 43 is disposed near the end of the pipe body 41 that is close to the drill bit 10 . After the drill bit 10 shovels out earth and rocks, the second protruding ribs 43 and the first protruding ribs 42 can apply a larger shearing force to the earth and rocks, which is suitable for drilling in a relatively hard geological environment.

As shown in FIG. 11, the cross-section of the first rib 42 is rectangular, and the cross-section of the second rib 43 is trapezoidal. The height of the second rib 43 relative to the outer wall surface 411 of the tube body 41 is greater than the height of the first rib 42 relative to the outer wall surface 411 of the tube body 41 . Each of the first protruding ribs 42 has a first top surface 421 , and each second protruding rib 43 has a second top surface 431 . The first top surface 421 and the second top surface 431 are opposite to the outer peripheral wall 411 of the tube body 41 . , the first top surface 421 and the inner peripheral wall 51 of the outer sleeve 50 have a first gap g1, and the first gap g1 has a first gap width D1, wherein 2cm≦D1≦8cm. Preferably, 4cm≦D1≦6cm. The optimal value of D1 is 5cm. The second gap g2 has a second gap width D2, wherein 1cm≦D2≦5cm. Preferably, 2cm≦D2≦4cm. The optimal value of D2 is 3cm. The second top surface 431 and the inner peripheral wall 51 of the outer sleeve 50 have a second gap g2, and the second gap width D2 is smaller than the first gap width D1.

Please refer to Fig. 13, which shows the use state of the earth boring device of the present invention. The drill bit 10 drills a ground hole on the ground, and at the same time, the outer casing 50 descends with the drill bit 10 and supports the hole wall of the ground hole. The pressurized air flows through the flow channel between the standpipe 40 and the shaft body 20, and is transported by the standpipe. The exhaust gap between the 40 and the drill bit 10 is discharged, so that the soil and stone shoveled by the drill bit 10 are transported upward to the ground along the interval between the riser 40 and the outer casing 50 . By arranging the first protruding ribs 42 on the outer peripheral wall 411 of the standpipe 40, the speed of the air flowing between the standpipe 40 and the outer casing 50 can be increased, and the soil can be transported to the ground smoothly, avoiding the problem of clogging of soil and rock. At the same time, the first convex rib 42 will rotate with the shaft body 20 to apply shearing force to the moving earth and rock, so that the earth and rock are broken. The outer casing 50 can support the hole wall of the ground hole to prevent the impact of the moving earth and rock, thereby preventing the ground hole from collapsing.

However, the above are only preferred embodiments of the present invention, and should not limit the scope of implementation of the present invention, that is, simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the description of the invention, All still fall within the scope of the patent of the present invention. In addition, any embodiment of the present invention or the scope of the claims is not required to achieve all of the objects or advantages or features disclosed herein. In addition, the abstract section and the title are only used to aid the search of patent documents and are not intended to limit the scope of the present invention. In addition, terms such as "first" and "second" mentioned in this specification or the scope of the patent application are only used to name the elements or to distinguish different embodiments or scopes, and are not used to limit the number of elements. upper or lower limit.

10: Drill 11: Blade 12: Groove 20: Shaft body 21: Connector 30: Drive 40: Riser 50: Outer casing 41: Tube body 42, 42a, 42b, 42c, 42d: the first rib 43: Second rib 51: Inner peripheral wall 52: Peripheral wall 100: Earth Drilling Device 411: Peripheral Wall 421: First top surface 431: Second top surface D1: first gap width D2: Second gap width g1: first gap g2: second gap d: spacing

Fig. 1 is a schematic diagram of the earth boring device of the present invention. Fig. 2 is a perspective view of the earth boring device of the present invention. FIG. 3 is a perspective view of the earth-boring device of FIG. 2 with the outer casing removed. FIG. 4 is a perspective view of an embodiment of a riser of the earth boring device of FIG. 3 . FIG. 5 is a radial cross-sectional view of the riser of FIG. 4 . FIG. 6 is a radial cross-sectional view of the combination of the riser and the outer casing of the earth-boring device of FIG. 2 . Fig. 7 is a perspective view of another embodiment of the riser of the earth boring device of the present invention. FIG. 8 is a radial cross-sectional view of the earth boring device of FIG. 2 . FIG. 9 is a radial cross-sectional view of a combination of a riser and an outer casing of the earth boring apparatus having the riser of FIG. 7 . Fig. 10 is a perspective view of yet another embodiment of the riser of the earth boring device of the present invention. FIG. 11 is a radial cross-sectional view of the riser of FIG. 10 . FIG. 12 is a radial cross-sectional view of the assembly of the riser and the outer sleeve of FIG. 10 . Fig. 13 is a schematic diagram of the use state of the earth boring device of the present invention.

10: Drill

20: Shaft body

30: Drive

40: Riser

50: Outer casing

100: Earth Drilling Device

Claims (19)

An earth-boring device, comprising: a drill bit (10); a shaft body (20) connected to the drill bit (10); a driver (30) connected to the shaft body (20) to drive the shaft body (20) ) rotates and drives the drill bit (10) to rotate; a standpipe (40) is sleeved on the shaft body (20) and linked with the axle body (20), the standpipe (40) includes a pipe body (41) ) and a plurality of first protruding ribs (42), the first protruding ribs (42) are arranged on an outer peripheral wall (411) of the tube body (41) and extend along the axial direction of the tube body (41), the The drill bit (10) is adjacent to the end edge of the pipe body (41), the standpipe (40) further comprises a plurality of second protruding ribs (43), and the second protruding ribs (43) are arranged on the pipe body (41) The outer peripheral wall (411) of the ) extends along the axial direction of the pipe body (41), the second protruding ribs (43) and the first protruding ribs (42) are staggered with each other; and an outer sleeve (50) , sleeved on the standpipe (40) and the drill bit (10), and there is a distance ( d). The ground boring device according to claim 1, wherein the first protruding ribs (42) are arranged at equal intervals from each other. The ground-boring device as claimed in claim 1, wherein each of the first protruding ribs (42) has a first top surface (421), the first top surface (421) and the pipe body (41) The outer peripheral walls (411) are oppositely disposed, and a first gap (g1) is formed between the inner peripheral wall (51) of the outer sleeve (50) and the first top surface (421). The ground boring device according to claim 1, wherein the interval between at least two adjacent first protruding ribs (42) is different from the interval between the other first protruding ribs (42). The ground boring device according to claim 1, wherein each of the second protruding ribs (43) and the adjacent first protruding ribs (42) have equal intervals. The ground boring device as claimed in claim 1, wherein the lengths of the second protruding ribs (43) are smaller than the lengths of the first protruding ribs (42). The ground boring device according to claim 1, wherein the cross-section of each of the first protruding ribs (42) is rectangular, and the cross-section of each of the second protruding ribs (43) is trapezoidal. The ground boring device according to claim 7, wherein the ratio of the length of the first protruding ribs (42) to the length of the pipe body (41) is R1, wherein 0.8≦R1≦1. The earth-boring device according to claim 8, wherein the ratio of the length of the first protruding ribs (42) to the length of the pipe body (41) is R1=0.9. The ground boring device according to claim 7, wherein the ratio of the length of the second protruding ribs (43) to the length of the pipe body (41) is R2, wherein 0.05≦R2≦0.15. The earth-boring device according to claim 10, wherein the ratio of the length of the second protruding ribs (43) to the length of the pipe body (41) is R2=0.1. The ground boring device as claimed in claim 1, wherein each of the first protruding ribs (42) has a first top surface (421), and each of the second protruding ribs (43) has a second top surface (431), the first top surface (421) and the second top surface (431) are opposite to the outer peripheral wall (411) of the pipe body (41), and the first top surface (421) is opposite to the outer sleeve The inner peripheral wall (51) of (50) has a first gap (g1), the second top surface (431) and the inner peripheral wall (51) of the outer sleeve (50) have a second gap (g2), The width of the second gap (g2) is smaller than the width of the first gap (g1). The ground boring device of claim 12, wherein the first gap (g1) has a first gap width D1, wherein 2cm≦D1≦8cm. The ground drilling device according to claim 13, wherein 4cm≦D1≦6cm. The earth-boring device of claim 14, wherein D1=5cm. The ground boring device of claim 12, wherein the second gap (g2) has a second gap width D2, wherein 1cm≦D2≦5cm. The ground drilling device according to claim 16, wherein 2cm≦D2≦4cm. The earth-boring device of claim 17, wherein D2=3cm. The ground-boring device according to any one of claims 1 to 18, wherein there is an air flow channel between the pipe body (41) and the shaft body (20), and the drill bit (10) and the pipe body (41) There is an exhaust gap between the end edges of the ), and the gas is discharged to the distance between the pipe body (41) and the outer sleeve (50) through the airflow channel and the exhaust gap.

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