Movable rotary drilling cylinder mute soil removal device and method

Abstract

This invention discloses a movable rotary drilling rig silent soil removal device and method, including a base, an outer column, and a lifting ring. The outer column is arranged vertically, with its bottom fixedly mounted on the base and its top fixedly connected to the lifting ring. A drive shaft is arranged axially inside the outer column, with an elastic reset device at its bottom, which is mounted on the base. The top of the drive shaft passes through the outer column and the lifting ring, extending beyond the top surface of the lifting ring. The drive shaft has multiple soil-breaking cutter arms arranged symmetrically at the same height as the drive shaft. This invention, by setting the soil removal device within the rotation range of the rotary drilling rig, enables soil breaking and removal upon contact with the rotary drilling rig. During this process, the device contacts the soil without generating significant noise, achieving a silent soil removal effect.

Description

Technical Field

[0001] This invention relates to the field of building foundation construction technology, specifically to a mobile rotary drilling rig with a silent soil removal device and method. Background Technology

[0002] In the field of foundation engineering construction, rotary drilling rigs are widely used in various pile foundation construction scenarios such as building construction, bridges, and municipal engineering due to their advantages of high drilling efficiency, strong adaptability, and convenient operation. Their core working principle is to use the drill rod to drive the drill bit to rotate and cut the strata. The drill bit's special structure then collects the broken soil inside, and the drill rod is lifted to bring the soil out of the hole, completing the drilling operation.

[0003] However, traditional rotary drilling rigs have significant noise problems during the excavation and removal process, becoming a key factor restricting their use in sensitive areas. Traditional excavation and removal methods typically rely on raising the drill bit to the surface and then using manual knocking, mechanical vibration, or high-pressure air jetting to remove the excavated soil from the drill bit. During this process, the collision and vibration of mechanical parts, as well as the friction between the high-pressure airflow and the excavated soil, generate a large amount of noise, typically reaching 85-110 decibels, far exceeding urban environmental noise limits.

[0004] Especially in sensitive areas such as urban centers, hospitals, schools, and residential areas, the noise problem of traditional rotary drilling rigs has become a major bottleneck restricting their application. The limitations of traditional soil removal technology in noise control are becoming increasingly apparent, and there is an urgent need to develop a new technology that can effectively reduce the noise of rotary drilling rigs in the soil removal process, in order to meet environmental protection requirements, improve the construction environment, increase construction efficiency, and promote the compliant application of rotary drilling rigs in sensitive areas. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a mobile rotary drilling rig silent soil removal device and method with high soil discharge efficiency and quiet environmental protection.

[0006] The technical solution of the present invention is as follows:

[0007] A movable rotary drilling rig with silent soil removal device includes a base, an outer column, and a lifting ring; the outer column is arranged vertically, the bottom of the outer column is fixedly mounted on the base, and the top of the outer column is fixedly connected to the lifting ring.

[0008] The outer column has a drive shaft inside along its axial direction. The bottom of the drive shaft is provided with an elastic reset device and is mounted on the base through the elastic reset device. The top of the drive shaft passes through the outer column and the lifting ring and extends out of the top surface of the lifting ring.

[0009] The drive shaft is provided with multiple soil-breaking cutter arms arranged along its axial direction. The soil-breaking cutter arms are symmetrically arranged at the same height as the drive shaft. One end of each soil-breaking cutter arm is movably connected to the drive shaft to form a connecting end, and the other end of the soil-breaking cutter arm is freely arranged to form a free end.

[0010] Multiple waist-shaped holes are symmetrically arranged along the axial direction on the outer column, and the free end of the soil-breaking blade arm passes through the waist-shaped holes.

[0011] Furthermore, the base is a rotating base, including a rotating seat and a fixed seat. The rotating seat is disposed on the fixed seat, and a rolling element is provided between the rotating seat and the fixed seat. The outer edge of the rotating seat extends to the lower part of the fixed seat.

[0012] Furthermore, the outer column has a conical structure on the outside and is hollow inside, with both ends being open, and the upper surface of the rotating base has a conical surface.

[0013] Furthermore, the length of the earth-breaking cutter arm increases sequentially from top to bottom along the axial direction of the drive shaft, ensuring that both ends of the symmetrical earth-breaking cutter arm do not exceed the diameter of the rotary drilling barrel.

[0014] Furthermore, the elastic reset device includes a spring placement seat, a reset spring, and a spring seat. The spring placement seat is mounted on a rotating base and is cylindrical. The reset spring is located inside the spring placement seat. The spring seat is located on top of the reset spring and cooperates with the spring placement seat. The spring seat is fixedly connected to the drive shaft.

[0015] Furthermore, the lifting ring is provided with through holes at the positions where it mates with the drive shaft, and the drive shaft is provided with a bushing at the position of the through hole.

[0016] Furthermore, the drive shaft is provided with multiple pin holes along the axial direction, and the two symmetrically arranged soil-breaking cutter arms are movably positioned at the pin hole positions via pin shafts.

[0017] Furthermore, the rotating seat has a countersunk hole in the circumferential direction, and the fixed seat has a threaded hole in the circumferential direction. The rotating seat and the fixed seat can be locked together by screws.

[0018] Furthermore, the rotating seat has a countersunk hole in the circumferential direction, the fixed seat has a threaded hole in the circumferential direction, and the rotating seat and the fixed seat are locked together by screws.

[0019] Furthermore, the bottom of the fixed base is provided with multiple mounting holes along the circumferential direction for installing ground nails.

[0020] Furthermore, a pressure plate is provided at the top of one end of the drive shaft that extends out of the top surface of the lifting ring, and the pressure plate is detachably connected to the drive shaft.

[0021] The silent soil removal construction method of the portable rotary drilling rig silent soil removal device includes the following steps:

[0022] Step 1) Connect the hoisting equipment to the lifting ring and hoist the entire device to the vicinity of the pile foundation, within the rotation range of the rotary drilling rig;

[0023] Step 2) After the hoisting equipment moves the entire device to directly above the pre-set position on the ground, it begins to descend. When it is 1.5-1.8m above the ground, the ground stakes are manually installed onto the fixed base.

[0024] Step 3) The hoisting equipment lowers the entire device to the pre-set position on the ground, and the pressing equipment presses the ground nails on the fixed base into the ground.

[0025] Step 4) The rotary drilling rig is aligned with the pile position and digs downwards. After digging to the set depth, the rotary drilling rig drives the rotary drilling barrel to lift and rotate to move above the device. The rotary drilling rig then drives the rotary drilling barrel to descend.

[0026] Step 5) When the soil inside the rotary drilling barrel touches the pressure plate, the drive shaft drives the soil breaking cutter arm to rotate, and the symmetrically arranged soil breaking cutter arms change from an inverted V shape to a V shape, so as to initially break the soil inside the rotary drilling barrel.

[0027] Step 6) The rotary drilling rig drives the rotary drilling barrel to rise. Under the action of the elastic reset device, the drive shaft drives the soil breaking cutter arm to rotate. The symmetrically arranged soil breaking cutter arms change from V shape to inverted V shape and return to their original state.

[0028] Step 7) The rotary drilling rig drives the rotary drilling barrel up and down repeatedly to perform the actions in Steps 5 and 6.

[0029] Step 8) Continue rotary drilling operations until the soil inside the rotary drilling barrel is completely removed.

[0030] Step 9) The excavator on site removes the soil covering the device and its vicinity; repeat steps 4) to 8) until construction is completed.

[0031] Step 10) After construction is completed, clean the surface of the device: First, remove the screws between the rotating seat and the fixed seat, then wrap several turns of rope around the outer column (bottom or top), and quickly pull the rope to make the rotating seat and the outer column, lifting ring and soil-breaking blade arm on the rotating seat rotate together. Under the action of centrifugal force, the soil adhering to the device is cleaned up for the next use.

[0032] The beneficial effects of this invention are as follows:

[0033] 1) This invention sets up a soil removal device within the rotation range of a rotary drilling rig. When the rotary drilling barrel comes into contact with the device, it can achieve the function of breaking and removing soil. During this process, the device comes into contact with the soil without generating obvious noise, thus achieving the effect of silent soil removal.

[0034] 2) The device is cleverly designed with soil-breaking cutter arms and an elastic reset device. In the natural state, the drive shaft is not under pressure, and the symmetrically arranged soil-breaking cutter arms are inverted V-shaped, which facilitates the soil to slide down. When the drive shaft is under pressure, the symmetrically arranged soil-breaking cutter arms are in V-shaped, which facilitates the cutter arms to break the soil.

[0035] 3) The outer column and rotating seat of this invention both adopt a conical surface structure to prevent soil accumulation and facilitate the cleaning of subsequent devices.

[0036] 4) In the process of removing soil, the present invention cleverly adopts a method of reciprocating contact with the device from top to bottom, which effectively improves the soil removal effect. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0038] Figure 2 This is a diagram of the internal mounting structure of the present invention;

[0039] Figure 3 This is a structural diagram of the elastic reset device of the present invention;

[0040] Figure 4 This is an installation diagram of the excavator arm structure of the present invention;

[0041] Figure 5 This is an enlarged view of the screw mounting position structure of the present invention;

[0042] In the diagram: 1. Base; 101. Rotating seat; 102. Fixed seat; 103. Rolling element; 2. Outer column; 201. Waist-shaped hole; 3. Lifting ring; 4. Drive shaft; 401. Pin hole; 5. Soil-breaking cutter arm; 6. Pressure plate; 7. Elastic reset device; 701. Spring seat; 702. Spring placement seat; 703. Reset spring; 8. Ground stake; 9. Bushing; 10. Pin; 11. Screw; 12. Dust plug. Detailed Implementation

[0043] The present invention will be further described below with reference to the accompanying drawings.

[0044] like Figure 1 As shown, a movable rotary drilling rig with silent soil removal device includes a base 1, an outer column 2 mounted on the base 1, a lifting ring 3 mounted on the top of the outer column 2, a drive shaft 4 mounted inside the outer column 2, a pressure plate 6 mounted on the top of the drive shaft 4, and soil-breaking cutter arms symmetrically mounted on the axial direction of the drive shaft 4 and extending out of the outer column 2 through a waist-shaped hole 201.

[0045] In this embodiment, the length of the earth-breaking cutter arm 5 increases from top to bottom along the axial direction of the drive shaft 4, and ensures that both ends of the symmetrical earth-breaking cutter arm 5 do not exceed the diameter of the rotary drilling barrel. When the symmetrically arranged earth-breaking cutter arms 5 form a V-shape, they can quickly break the soil within the diameter range of the rotary drilling barrel, thereby improving the breaking range and breaking efficiency.

[0046] The base 1 is a rotating base, including a rotating seat 101 and a fixed seat 102. The rotating seat 101 is mounted on the fixed seat 102, and a rolling element 103 (ball or roller) is provided between the rotating seat 101 and the fixed seat 102. Correspondingly, the rotating seat 101 and the fixed seat 102 are provided with grooves for placing the ball or roller. The outer edge of the rotating seat 101 extends to the lower part of the fixed seat 102 to prevent soil intrusion. In this embodiment, the upper surface of the rotating seat 101 is a conical surface to prevent soil from accumulating on the base and to throw the soil out during the cleaning process. In this embodiment, the bottom of the fixed seat 102 is provided with multiple mounting holes along the circumferential direction for mounting ground nails 8, that is, the ground nails 8 are threadedly connected to the fixed seat 102.

[0047] The rotating base 101 has a countersunk hole in its circumference, and the fixed base 102 has a threaded hole in its circumference. The rotating base 101 and the fixed base 102 can be locked together by screws 11. A dust plug 12 is provided at the countersunk hole to prevent soil from entering. Before using the device, the screws 11 need to be tightened. After the construction is completed and the device is cleaned, the screws 11 are loosened and removed for easy cleaning.

[0048] The outer column 2 adopts a conical structure on the outside and is hollow inside, with both ends open. The conical structure of the outer column 2 is conducive to soil breaking and can also prevent soil adhesion.

[0049] The outer column 2 has a drive shaft 4 installed inside it along its axial direction. The bottom of the drive shaft 4 is equipped with an elastic reset device 7, which is mounted on the base 1. Figure 2 , 3 As shown, the elastic reset device 7 includes a spring placement seat 702, a reset spring 703, and a spring seat 701. The spring placement seat 702 is fixedly mounted on the rotating base 101 and is cylindrical. The reset spring 703 is located inside the spring placement seat 702, and the spring seat 701 is located on top of the reset spring 703 and cooperates with the spring placement seat 702. The spring seat 701 is fixedly connected to the drive shaft 4.

[0050] The top of the drive shaft 4 passes through the outer column 2 and the lifting ring 3 and extends out of the top surface 3 of the lifting ring. The lifting ring 3 is provided with through holes at the positions where it mates with the drive shaft 4. The drive shaft 4 is provided with a bushing 9 at the position of the through hole. The bushing 9 can prevent wear problems during the up and down sliding process of the drive shaft 4.

[0051] like Figure 4 As shown, the drive shaft 4 is equipped with multiple soil-breaking cutter arms 5 arranged axially along its axis. The soil-breaking cutter arms 5 are symmetrically arranged at the same height as the drive shaft 4. One end of each soil-breaking cutter arm 5 is movably connected to the drive shaft 4 to form a connecting end, while the other end of each soil-breaking cutter arm 5 is freely disposed to form a free end. The free end of each soil-breaking cutter arm 5 passes through a waist-shaped hole 201. The drive shaft 4 is provided with multiple pin holes 401 along its axis. Two symmetrically arranged soil-breaking cutter arms 5 are movably disposed in the pin holes 401 by means of pins 10. When the drive shaft 4 moves downward, it drives the soil-breaking cutter arms 5 to move downward. After the soil-breaking cutter arms 5 contact the bottom of the waist-shaped hole 201, they move in the opposite direction, thus achieving the flipping of the soil-breaking cutter arms 5.

[0052] The top of the end of the drive shaft 4 that extends out of the top surface 3 of the lifting ring is provided with a pressure plate 6. The pressure plate 6 and the drive shaft 4 are detachably connected, specifically by a threaded connection.

[0053] The silent soil removal construction method of the portable rotary drilling rig silent soil removal device includes the following steps:

[0054] Step 1) Connect the hoisting equipment to the lifting ring and hoist the entire device to the vicinity of the pile foundation, within the rotation range of the rotary drilling rig;

[0055] Step 2) After the hoisting equipment moves the entire device to directly above the pre-set position on the ground, it begins to descend. When it is 1.5-1.8m above the ground, the ground stakes are manually installed onto the fixed base.

[0056] Step 3) The hoisting equipment lowers the entire device to the pre-set position on the ground, and the pressing equipment presses the ground nails on the fixed base into the ground.

[0057] Step 4) The rotary drilling rig is aligned with the pile position and digs downwards. After digging to the set depth, the rotary drilling rig drives the rotary drilling barrel to lift and rotate to move above the device. The rotary drilling rig then drives the rotary drilling barrel to descend.

[0058] Step 5) When the soil inside the rotary drilling rig touches the pressure plate, it creates downward pressure, which drives the drive shaft to move downward. The drive shaft drives the soil breaking cutter arm to rotate, and the symmetrically arranged soil breaking cutter arm changes from an inverted V shape to a V shape, thus initially breaking the soil around the rotary drilling rig.

[0059] Step 6) The rotary drilling rig drives the rotary drilling barrel to rise. Under the action of the elastic reset device, the drive shaft drives the soil breaking cutter arm to rotate. The symmetrically arranged soil breaking cutter arms change from V shape to inverted V shape and return to their original state.

[0060] Step 7) The rotary drilling rig drives the rotary drilling barrel up and down repeatedly to perform the actions in Steps 5 and 6.

[0061] Step 8) Continue rotary drilling operations until the soil inside the rotary drilling barrel is completely removed.

[0062] Step 9) The excavator on site removes the soil covering the device; repeat steps 4) to 8) until construction is completed.

[0063] Step 10) After construction is completed, clean the surface of the device: First, remove the screws between the rotating seat and the fixed seat, then wrap several turns of rope around the bottom of the outer column, and quickly pull the rope to make the rotating seat and the outer column, lifting ring and soil-breaking blade arm on the rotating seat rotate together. Under the action of centrifugal force, the soil adhering to the device is cleaned up for the next use.

[0064] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the technical solutions of the present invention. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of the patent of the present invention.

Claims

1. A portable rotary drilling rig with silent soil removal device, characterized in that, It includes a base (1), an outer column (2), and a lifting ring (3); the outer column (2) is arranged in a vertical direction, the bottom of the outer column (2) is fixedly set on the base (1), and the top of the outer column (2) is fixedly connected to the lifting ring (3); The outer column (2) has a drive shaft (4) inside along its axial direction. The bottom of the drive shaft (4) is provided with an elastic reset device (7), and it is set on the base (1) through the elastic reset device (7). The top of the drive shaft (4) passes through the outer column (2) and the lifting ring (3) and extends out of the top surface of the lifting ring (3). The drive shaft (4) is provided with a plurality of soil breaking cutter arms (5) arranged along its axial direction. The soil breaking cutter arms (5) are symmetrically arranged at the same height as the drive shaft (4). One end of the soil breaking cutter arm (5) is movably connected to the drive shaft (4) to form a connecting end, and the other end of the soil breaking cutter arm (5) is freely arranged to form a free end. Multiple waist-shaped holes (201) are symmetrically arranged along the axial direction on the outer column (2), and the free end of the soil-breaking blade arm (5) passes through the waist-shaped holes (201); The top of one end of the drive shaft (4) extending out of the top surface of the lifting ring (3) is provided with a pressure plate (6), and the pressure plate (6) is detachably connected to the drive shaft (4); During construction, the rotary drilling rig lowers the rotary drilling barrel; when the soil inside the rotary drilling barrel touches the pressure plate, the drive shaft drives the soil breaking arm to rotate, initially breaking the soil inside the rotary drilling barrel; the rotary drilling rig then raises the rotary drilling barrel, and under the action of the elastic reset device, the drive shaft drives the soil breaking arm to rotate, restoring it to its original state.

2. The portable rotary drilling rig silent soil removal device according to claim 1, characterized in that, The base (1) is a rotating base, including a rotating seat (101) and a fixed seat (102). The rotating seat (101) is disposed on the fixed seat (102), and a rolling element (103) is provided between the rotating seat (101) and the fixed seat (102). The outer edge of the rotating seat (101) extends to the lower part of the fixed seat (102).

3. The movable rotary drilling rig silent soil removal device according to claim 2, characterized in that, The length of the earth-breaking cutter arm (5) increases from top to bottom along the axial direction of the drive shaft (4), and ensures that the two ends of the symmetrical earth-breaking cutter arm (5) do not exceed the diameter of the rotary drilling barrel.

4. A portable rotary drilling rig silent soil removal device according to claim 3, characterized in that, The elastic reset device (7) includes a spring placement seat (702), a reset spring (703), and a spring seat (701). The spring placement seat (702) is mounted on the rotating base (101). The spring placement seat (702) is cylindrical. The reset spring (703) is mounted inside the spring placement seat (702). The spring seat (701) is mounted on the top of the reset spring (703) and cooperates with the spring placement seat (702). The spring seat (701) is fixedly connected to the drive shaft (4).

5. A portable rotary drilling rig silent soil removal device according to claim 4, characterized in that, The lifting ring (3) is provided with through holes at the positions where it mates with the drive shaft (4), and the drive shaft (4) is provided with a bushing (9) at the position of the through hole.

6. A portable rotary drilling rig silent soil removal device according to claim 5, characterized in that, The drive shaft (4) has multiple pin holes (401) along the axial direction, and the two symmetrically arranged soil-breaking blades (5) are movably positioned at the pin holes (401) via pin shafts (10).

7. A portable rotary drilling rig silent soil removal device according to claim 6, characterized in that, The rotating seat (101) has a countersunk hole in the circumferential direction, and the fixed seat (102) has a threaded hole in the circumferential direction. The rotating seat (101) and the fixed seat (102) can be locked together by screws (11).

8. A portable rotary drilling rig silent soil removal device according to claim 7, characterized in that, The bottom of the fixed base (102) is provided with multiple mounting holes along the circumferential direction for installing ground nails (8).

9. A silent soil removal construction method based on the portable rotary drilling rig silent soil removal device as described in claim 8, characterized in that, Includes the following steps: Step 1) Connect the hoisting equipment to the lifting ring and hoist the entire device to the vicinity of the pile foundation, within the rotation range of the rotary drilling rig; Step 2) After the hoisting equipment moves the entire device to directly above the pre-set position on the ground, it begins to descend. When it is 1.5-1.8m above the ground, the ground stakes are manually installed onto the fixed base. Step 3) The hoisting equipment lowers the entire device to the pre-set position on the ground, and the pressing equipment presses the ground nails on the fixed base into the ground. Step 4) The rotary drilling rig is aligned with the pile position and digs downwards. After digging to the set depth, the rotary drilling rig drives the rotary drilling barrel to lift and rotate to move above the device. The rotary drilling rig then drives the rotary drilling barrel to descend. Step 5) When the soil inside the rotary drilling barrel touches the pressure plate, the drive shaft drives the soil breaking cutter arm to rotate, and the symmetrically arranged soil breaking cutter arms change from an inverted V shape to a V shape, so as to initially break the soil inside the rotary drilling barrel. Step 6) The rotary drilling rig drives the rotary drilling barrel to rise. Under the action of the elastic reset device, the drive shaft drives the soil breaking cutter arm to rotate. The symmetrically arranged soil breaking cutter arms change from V shape to inverted V shape and return to their original state. Step 7) The rotary drilling rig drives the rotary drilling barrel up and down repeatedly to perform the actions in Steps 5 and 6. Step 8) Continue rotary drilling until the soil inside the rotary drilling barrel is completely removed; Step 9) Use an excavator to remove the soil covering the equipment and surrounding area; repeat steps 4)-8) until construction is complete; Step 10) After construction is completed, clean the surface of the device: First, remove the screws between the rotating seat and the fixed seat, then wrap several turns of rope around the outer column, and quickly pull the rope to make the rotating seat and the outer column, lifting ring and soil-breaking blade arm on the rotating seat rotate together. Under the action of centrifugal force, the soil adhering to the device is cleaned up for the next use.

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