CN112160717A - Hole bottom expanding drill bit capable of being matched with rotary drilling rig for use - Google Patents
Hole bottom expanding drill bit capable of being matched with rotary drilling rig for use Download PDFInfo
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- CN112160717A CN112160717A CN202011199780.9A CN202011199780A CN112160717A CN 112160717 A CN112160717 A CN 112160717A CN 202011199780 A CN202011199780 A CN 202011199780A CN 112160717 A CN112160717 A CN 112160717A
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- rod
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- rotary drilling
- expanding
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- 238000005553 drilling Methods 0.000 title claims abstract description 62
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 239000002689 soil Substances 0.000 abstract description 24
- 238000005520 cutting process Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 230000000670 limiting effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000003381 stabilizer Substances 0.000 description 4
- 239000011150 reinforced concrete Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
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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
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
-
- 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
- E21B27/00—Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, baskets or buckets for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
A hole bottom expanding drill bit capable of being matched with a rotary drilling rig for use can be lowered to the bottom of a hole along with a drill rod of the rotary drilling rig, door-type expanding sheets are gradually opened under the control of the downward pressure of the drill rod of the rotary drilling rig, the door-type expanding sheets are pushed to cut soil on the hole wall layer by layer along with the clockwise rotation of the drill rod of the rotary drilling rig, the diameter of the hole bottom is gradually expanded to 2 times of the original diameter, and a cone-like hole bottom shape is formed. After the cutting process is finished, the cut soil is completely collected into the cylinder body through the folding of the door type expanding sheets, and after the door type expanding sheets are completely closed, the cylinder body is completely closed, so that the cut soil can be completely taken out of the pile hole.
Description
Technical Field
The invention relates to the technical field of rotary drilling bits, in particular to a hole bottom expanding drill bit capable of being matched with a rotary drilling rig for use.
Background
In the construction of the reinforced concrete cast-in-place pile, the reinforced concrete club-footed cast-in-place pile has incomparable technical advantages in various aspects such as compression resistance, pulling resistance and the like. The reinforced concrete pedestal cast-in-place pile is difficult to construct in a hole forming mode, namely, in a hole bottom expanding link, hole bottom expanding is excavated in a manual mode, or a simple tool is temporarily adopted to expand the hole bottom, so that the requirements on construction quality and safety cannot be met. At present, no reliable hole bottom expanding process exists in a construction environment with a deep hole depth or a hole bottom below an underground water level. Although various mechanical hole bottom expanding technologies exist, most of the technologies have the defect that residual soil left after hole bottom expanding cannot be cleaned. The residual soil left after hole bottom expanding, especially the soil left after hole bottom expanding after hole forming below ground water level is mixed with water to form a large amount of hole bottom sediment which must be mixed with the concrete poured in the subsequent process, thereby reducing the quality of the concrete at the pile end and becoming the quality hidden trouble of pile foundation construction.
Disclosure of Invention
A hole bottom expanding drill bit capable of being matched with a rotary drilling rig for use mainly comprises: the device comprises a cylinder body, a main power rod, a secondary power rod and a door type expanding sheet. The hole bottom expanding drill bit capable of being matched with the rotary drilling rig for use is provided with two types of secondary power rod structures AB and AB, so that the drill bit is suitable for different geological conditions. A hole bottom expanding drill bit which is provided with an A-type secondary power rod and can be matched with a rotary drilling rig for use is referred to as an A-type hole bottom expanding drill bit for short; a hole bottom expanding drill bit which is provided with a B-type secondary power rod and can be matched with a rotary drilling rig for use is called as a B-type hole bottom expanding drill bit for short; the hole bottom expanding drill bit which can be matched with the rotary drilling rig is called the hole bottom expanding drill bit for short.
The cylinder body comprises a cylindrical structure with an upper bottom and a lower bottom, and two door type expanding sheets are symmetrically arranged on the side wall; the upper bottom is connected with the main power rod in a nested mode, the lower bottom is connected with the main power rod in a nested mode through the fixed rod, and the barrel, the main power rod and the drill rod of the rotary drilling rig keep synchronous rotation.
The main power rod is of a tubular structure and is the only component for connecting the drill bit and the drill rod of the rotary drilling rig, and the main power rod transmits the torque of the drill rod of the rotary drilling rig to enable the drill bit and the drill rod of the rotary drilling rig to synchronously rotate; meanwhile, the main power rod transmits the downward pressure and the upward tension of the drill rod of the rotary drilling rig, and the door type expanding sheet is opened and closed through the secondary power rod connected with the main power rod.
In order to adapt to complex geological conditions and improve the adaptability and reliability of the hole bottom expanding drill bit, A, B transmission structures of two different types are designed for the secondary power rod of the hole bottom expanding drill bit: the A-type secondary power rod is of a tubular structure, four spiral grooves are formed in the inner wall of the pipe, the pipe is fixed to the central position between the upper bottom and the lower bottom of the barrel through a bearing, the A-type secondary power rod is nested with four limiting clamping blocks at the bottom end of the main power rod through the inclined grooves in the inner side of the A-type secondary power rod, and the A-type secondary power rod can rotate clockwise to drive the door type expanding sheet to expand outwards when the main power rod presses down; when the power rod is pulled upwards for a stroke, the A-type secondary power rod can rotate anticlockwise to drive the door type expanding sheet to fold inwards; the type B secondary power rod is of a square tubular structure and is provided with two groups of gears, each group of gears comprises two pairs of gears, and each pair of gears comprises a main power gear meshed with a rack of the main power rod and a limiting gear with a limiting effect. When the main power rod presses down for a stroke, the rack on the main power rod moves downwards, so that the main power gear on the B-type secondary power rod meshed with the rack rotates inwards to drive the door type expanding sheet to expand outwards; when the power rod is pulled upwards for travel, the rack on the main power rod moves upwards, so that the main power gear on the B-type secondary power rod meshed with the rack rotates outwards to drive the door type expanding sheet to fold inwards.
The lower edge of the gate type expanding sheet is 1/4 of the circumference of the lower bottom, the gate type expanding sheet is gradually narrowed upwards to the gate post, the hole wall can be cut by opening the gate type expanding sheet, the cylinder body can be closed after closing the gate type expanding sheet, and the power fluted disc on the gate type expanding sheet is meshed with the gear of the secondary power rod and is opened and closed around the gate post.
The hole bottom expanding drill bit can be lowered to the bottom of a hole along with a drill rod of the rotary drilling rig, the gate-type expanding sheets are gradually opened under the control of the downward pressure of the drill rod of the rotary drilling rig, and the gate-type expanding sheets are pushed to cut soil on the hole wall layer by layer along with the clockwise rotation of the drill rod of the rotary drilling rig to form a hole bottom shape similar to a cone by rotating synchronously with the clockwise rotation of the drill rod of the rotary drilling rig to the maximum of 2 times the original diameter. After the cutting process is finished, the hole bottom expanding drill bit collects the cut soil into the cylinder body completely through the folding of the door type expanding sheets, and after the door type expanding sheets are completely closed, the cylinder body is completely closed, so that the cut soil can be taken out of the pile hole completely.
The mutual linkage of the parts of the bottom hole expanding drill bit will be described in detail as follows: the rotary drilling rig reloads the A-shaped hole bottom expanding drill bit to the hole bottom, when the A-shaped hole bottom expanding drill bit touches the bottom, the downward pressure of the rotary drilling rig is transmitted to the drill bit main power rod by the drill rod, the main power rod moves downwards under pressure, the A-shaped secondary power rod nested outside the main power rod rotates clockwise, the gear on the A-shaped secondary power rod drives the power fluted disc to rotate, and the portal expanding piece rotates and opens around the portal column. Similarly, the rotary drilling rig reloads the B-type hole bottom expanding drill bit to the hole bottom, when the B-type hole bottom expanding drill bit touches the bottom, the downward pressure of the rotary drilling rig is transmitted to the drill bit driving power rod through the drill rod, the driving power rod moves downward under pressure, the rack on the driving power rod moves downward, the driving power gear on the B-type secondary power rod meshed with the driving power gear rotates inwards, the power fluted disc is driven to rotate, and the portal expanding piece rotates and opens around the portal column.
Meanwhile, the drill rod of the rotary drilling rig can synchronously rotate clockwise, the driving power rod connected with the drill rod of the rotary drilling rig also simultaneously rotates clockwise, the driving power rod is connected with the upper bottom of the cylinder body in an embedded mode and connected with the fixed rod at the lower bottom in an embedded mode, at the moment, the cylinder body and the drill rod of the rotary drilling rig synchronously rotate clockwise, and the opened door type expanding pieces begin to cut soil on the side wall of the bottom of the hole.
When the drill rod of the rotary drilling rig keeps proper downward pressure and continuously rotates the drill rod clockwise, the hole bottom expanding drill bit rotates at proper speed, and the two door-type expanding sheets are gradually expanded to cut soil on the hole wall layer by layer.
Generally, the thickness of soil on the hole wall once cut by the tooth blades of the portal type expanding sheet of the hole bottom expanding drill bit is related to the downward pressure applied by a drill rod of the rotary drilling rig and the soil property on the side wall of the hole bottom.
When the main power rod body descends to 2/3 of the full stroke from the initial position, the opening radian of the bottom hole expanding drill door type expanding sheet is about 60 degrees, and the cut soil can be just loaded by the barrel body.
At the moment, the drill rod of the rotary drilling rig stops pressing down and is changed into smaller upward pulling force. The pulling force of the rotary drilling rig is transmitted to an A-type hole bottom expanding drill bit main power rod through a drill rod, the main power rod starts to move upwards, an A-type secondary power rod nested on the outer side of the main power rod rotates anticlockwise, a gear rotating on the A-type secondary power rod drives a power fluted disc on an expanding plate, and the portal expanding plate rotates around a portal column and is gradually folded; similarly, the tensile force of the rotary drilling rig is transmitted to a main power rod of the B-type hole bottom expanding drill bit through a drill rod, the main power rod starts to move upwards, a rack on the main power rod moves upwards, a main power gear on a B-type secondary power rod meshed with the rack on the main power rod rotates outwards, and the portal expanding sheet rotates around the portal column and is gradually folded. Meanwhile, the drill rod of the rotary drilling rig continuously rotates while keeping proper upward tension, so that the two door type expanding sheets synchronously rotate clockwise while being gradually folded, and all soil cut from the side wall of the hole bottom can be collected into the barrel.
When the main power rod starts to move upwards to the initial highest position, the door type expanding sheet is completely folded, and the drill rod is continuously lifted, so that the hole bottom expanding drill bit can be lifted upwards to a working site. On the ground, the drill rod of the rotary drilling rig continuously rotates forward and backward alternately and quickly while keeping proper downward pressure, because the surrounding hole walls do not restrict the portal type expanding pieces of the hole bottom expanding drill bit, the two portal type expanding pieces of the hole bottom expanding drill bit can be completely opened, and the forward and backward alternate and quick rotation can completely throw out soil in the cylinder of the hole bottom expanding drill bit.
And (3) lowering the A-type hole bottom expanding drill bit for the second time, transmitting the downward pressure of the rotary drilling rig to the main power rod of the hole bottom expanding drill bit after bottom touching, enabling the main power rod to move downwards under pressure, enabling the A-type secondary power rod nested outside the main power rod to rotate clockwise, and enabling the gear on the A-type secondary power rod to drive the fan-shaped fluted disc to rotate, so that the expanding sheet rotates and opens around the gate post. Meanwhile, the drill rod of the rotary drilling rig can synchronously rotate clockwise, the driving power rod connected with the drill rod of the rotary drilling rig also simultaneously rotates clockwise, the driving power rod is connected with the upper bottom of the cylinder body in an embedded mode and connected with the fixed rod at the lower bottom in an embedded mode, the cylinder body and the drill rod of the rotary drilling rig synchronously rotate clockwise in the second time, and the opened door type expanding pieces rotate to cut soil on the side wall of the bottom of the hole. The drill rod of the rotary drilling rig keeps proper down pressure and continuously rotates, so that the hole bottom expanding drill bit rotates at proper speed, the two door type expanding sheets are gradually expanded, and soil on the hole wall can be cut layer by layer; similarly, a B-type hole bottom expanding drill bit is lowered, after bottom contact, the downward pressure of the rotary drilling rig is transmitted to a main power rod of the hole bottom expanding drill bit through a drill rod, the main power rod moves downward under pressure, a rack on the main power rod moves downward, a main power gear on a B-type secondary power rod meshed with the main power rod rotates forward, a power fluted disc is driven to rotate, and a portal expanding piece rotates and opens around a portal column. Meanwhile, the drill rod of the rotary drilling rig can synchronously rotate clockwise, the driving power rod connected with the drill rod of the rotary drilling rig also simultaneously rotates clockwise, the driving power rod is connected with the upper bottom of the cylinder body in an embedded mode and connected with the fixed rod at the lower bottom in an embedded mode, the cylinder body and the drill rod of the rotary drilling rig synchronously rotate clockwise in the second time, and the opened door type expanding pieces rotate to cut soil on the side wall of the bottom of the hole. When the drill rod of the rotary drilling rig keeps proper down pressure and continuously rotates, the hole bottom expanding drill bit rotates at proper speed, and the two door-type expanding sheets are gradually expanded, so that soil on the hole wall can be cut layer by layer.
When the main power rod body descends from the initial position to the bottom, the fan-shaped fluted disc of the hole bottom expanding drill bit expanding sheet rotates for all strokes, and the diameter of the cut similar conical hole bottom is just 2 times of the original hole diameter. Taking a hole bottom expanding drill bit with the diameter of 600mm as an example, after hole bottom expanding is completed, the cone bottom of a hole bottom cone is a circle with the diameter of 1200mm, the height of the cone is 1000mm, and the upper bottom surface of the cone is a circle with the diameter of 600mm of an original hole. The shape has a good mechanical structure, and hole collapse in the hole forming process can be well prevented.
The hole bottom expanding drill converts the rotating torque of the drill rod of the rotary drilling rig and the pressure and the tension in the vertical direction into the opening, closing and rotating of the door-type expanding sheet of the hole bottom expanding drill, completely collects cut soil into a barrel in the process of expanding the diameter of the hole bottom, solves the construction problem that the left residue soil after hole bottom expanding cannot be cleaned all the time, cleans the hole bottom slurry determining success or failure of hole forming construction, and achieves simultaneous completion of bottom expanding and cleaning. The hole bottom expanding drill bit can ensure that the efficiency and the quality of the hole forming construction of the expanded-base pile reach a new height.
Drawings
FIG. 1 is a schematic structural view of an A-type hole bottom expanding bit;
FIG. 2 is a schematic structural view of a portal expanding plate of the hole bottom expanding drill bit;
FIG. 3 is a schematic structural diagram of the driving rod, the stabilizer bar and the upper and lower bottoms of the A-type hole bottom expanding drill bit;
FIG. 4 is a cross-sectional view of the main power rod and the sub power rod of the A-type hole bottom expanding drill bit;
FIG. 5 is a top view of the transmission structure of the A-type bottom hole expanding bit;
FIG. 6 is a schematic structural view of a B-type bottom hole expanding drill bit;
FIG. 7 is a schematic structural diagram of the driving rod, the stabilizer bar and the upper and lower bottoms of the B-type hole bottom expanding drill bit;
FIG. 8 is a top view of the transmission structure of a B-type bottom hole expanding bit;
in the figure:
1. barrel 2, driving rod 3, upper bottom 4, door type expanding sheet 5, fixed rod 6, limiting fixture block 7, lower bottom
8. The device comprises a door post 9, a power fluted disc 10, a ribbed plate 11, an A-type secondary power rod 12, a chute 13, a gear 14, a bearing 15, a limit gear 16, a B-type secondary power rod 17, a rack 18, a power gear 19 and an arc-shaped toothed rail.
Detailed Description
The invention will now be further described with reference to the accompanying drawings in which:
as shown in fig. 1, a schematic structural diagram of an a-type bottom hole expanding drill is shown: the main power rod 2 can move in the cylinder 1, but the rotation of the main power rod 2 is always synchronous with the cylinder 1. When the door type expanding sheet 4 is closed, the door type expanding sheet forms a part of the side wall of the cylinder body, so that the door type expanding sheet can conveniently pass through the aperture, and the gap after the door type expanding sheet is closed is also favorable for draining the moisture in the collected slurry.
As shown in fig. 2, a schematic structural diagram of a gate-type expanding sheet of the bottom hole expanding drill is shown: the portal column 8, the power fluted disc 9 and the ribbed slab 10 of the hole bottom expanding drill bit are of an integral structure and jointly form the portal expanding sheet 4. The inner side arc of the power fluted disc 9 is provided with an arc-shaped rack 19 on the upper surface and the lower surface, and the outer side arc is welded with the sail-shaped side surface of the expanding sheet 4 into a whole. When the power fluted disc 9 rotates anticlockwise by taking the door post 8 as a circle center, the door type expanding sheet 4 can be opened; when the power fluted disc 9 rotates clockwise with the door post 8 as the center of circle, the door type expanding sheet 4 can be closed.
As shown in fig. 3, it is a schematic structural diagram of the driving rod, the stabilizer bar and the upper and lower bottoms of the a-type hole bottom expanding drill: the main power rod 2 can move between the upper bottom 3 and the lower bottom 5, and when the main power rod 2 rotates between the upper bottom 3 and the lower bottom 5, the upper bottom 3 is connected with the main power rod 2 in a nested mode, and the lower bottom 7 is connected with the main power rod 2 in a nested mode through the fixing rod 5, so that the upper bottom 3 and the lower bottom 7 and the main power rod and a drill rod of the rotary drilling rig can be kept rotating synchronously. The lower end of the fixed rod 5 and the lower bottom 7 are of an integrated structure, the first function is to transmit the torque of the rotation of the main power rod 2, and the second function is to guide the main power rod 2 which moves up and down. When the main power rod 2 is pulled upwards, the limiting clamping block 6 can be clamped below the upper bottom 3, and the connection between the main power rod 2 and the barrel body 1 is ensured.
As shown in fig. 4, a cross-sectional view of the main power rod and the secondary power rod of the a-type hole bottom expanding drill is shown: the bearing 14 connects the A-type secondary power rod 11 with the upper bottom 3 and the lower bottom 7 of the cylinder body 1 into a whole, so that the A-type secondary power rod can rotate in the cylinder body 1, the chute 12 is used for decomposing downward pressure into torque, the A-type secondary power rod 11 generates torque and rotates in the process of vertical movement of the main power rod, when a drill rod of the rotary drilling rig continuously lifts, the main power rod 2 is clamped by the upper bottom 3 and does not move upwards any more when the limiting clamping block 6 rises to the position below the upper bottom 3, the gate type expanding sheet 4 is tightly closed, and the cylinder body 1 rises to the ground along with the hole bottom expanding drill bit.
As shown in fig. 5, it is a top view of the transmission structure of the a-type bottom hole expanding drill bit in the closed state and the fully open state: the nested power transmission structure comprises a main power rod 2, an A-type secondary power rod 11, a gear 13 and a sector fluted disc 9 which are tightly connected. When the secondary power rod 11 rotates clockwise, the gear 13 also rotates clockwise to drive the fan-shaped fluted disc 9 to rotate around the door post 8 as a circle center, and the door type expanding sheet 4 is pushed out and opened; when the secondary power rod 11 rotates anticlockwise, the gear 13 also rotates anticlockwise to drive the fan-shaped fluted disc 9 to rotate around the door post 8 as a circle center, and the door type expanding sheet 4 is pulled back to be folded; the strength of the gate type expanding sheet 4 for cutting the soil on the hole wall mainly comes from the torque of a drill rod of the rotary drilling rig, and the footage for cutting the soil on the hole wall at one time depends on the downward pressure of the drill rod of the rotary drilling rig.
As shown in fig. 6, a schematic structural diagram of a B-type hole bottom expanding drill is shown: the main power rod 2 can move in the cylinder 1, but the rotation of the main power rod 2 is always synchronous with the cylinder 1. When the door type expanding sheet 4 is closed, the door type expanding sheet forms a part of the side wall of the cylinder body, so that the door type expanding sheet can conveniently pass through the aperture, and the gap after the door type expanding sheet is closed is also favorable for draining the moisture in the collected slurry.
As shown in fig. 7, it is a schematic structural diagram of the driving rod, the stabilizer bar 5 and the upper and lower bottoms of the B-type hole bottom expanding drill: the lower end of the square-tube-shaped main power rod 2 is symmetrically provided with a pair of racks 17, the lower end of the power rod 2 can only move in the square-tube-shaped B-type secondary power rod 16, and when the main power rod 2 rotates, the structure can enable the upper bottom 3 and the lower bottom 7 and the main power rod 2 and a drill rod of a rotary drilling rig to synchronously rotate; when the main power bar tooth 2 goes down, both power gears 18 rotate inwards; when the main power lever tooth 2 goes upward, both power gears 18 rotate outward. When two groups of gears (four gears in each group) on the B-type secondary power rod 16 rotate, the arc-shaped rack 19 which can keep the gears engaged and clamped can rotate in the horizontal direction. Moreover, the structure can ensure that the door type expanding sheet 4 is tightly closed when the main power rod 2 goes upwards, and the cylinder body 1 rises to the ground along with the hole bottom expanding drill bit.
As shown in fig. 8, it is a top view of the transmission structure of the B-type bottom hole expanding drill bit in the closed state and the fully open state: the embedded fixed rod 5, the main power rod 2, the B-type secondary power rod 17, the power gear 18, the arc-shaped tooth track 19 and the power fluted disc 9 are tightly connected. When the main power rod 2 moves downwards, the two groups of power gears 18 on the B-type secondary power rod 17 rotate inwards to drive the arc-shaped tooth track 19 on the power tooth disc 9 to rotate, so that the door-type expanding sheet 4 is expanded; when the main power rod 2 goes upward, the two groups of power gears 18 on the B-type secondary power rod 17 rotate outwards to drive the arc-shaped tooth track 19 on the power tooth disc 9 to rotate, so that the door-type expanding sheet 4 is closed.
The invention is not limited to the above embodiments, and any simple modification, equivalent change and modification made according to the technical spirit of the invention are still within the technical scope of the invention.
Claims (5)
1. A hole bottom expanding drill bit capable of being matched with a rotary drilling rig for use comprises a cylinder body (1), a main power rod (2), an A-type secondary power rod (11) or a B-type secondary power rod (16) and a door-type expanding sheet (4).
2. The hole bottom expanding drill bit capable of being matched with the rotary drilling rig according to claim 1, is characterized in that: the cylinder body (1) is of a cylindrical structure with a closed upper bottom and a closed lower bottom, and two door-type expanding sheets (4) are symmetrically arranged on the side wall; the upper bottom (7) is connected with the main power rod (2) in a nested manner, the lower bottom (7) is connected with the main power rod (2) in a nested manner through the fixed rod (5), and the barrel body (1), the main power rod (2) and a drill rod of the rotary drilling rig keep synchronous rotation.
3. The hole bottom expanding drill bit capable of being matched with the rotary drilling rig according to claim 1, is characterized in that: the main power rod (2) is of a tubular structure, moves in the barrel (1) and is the only component for connecting the drill bit and the drill rod of the rotary drilling rig, and the main power rod (2) transmits the torque of the drill rod of the rotary drilling rig to enable the drill bit and the drill rod of the rotary drilling rig to synchronously rotate; meanwhile, the driving rod (2) transmits downward pressure and upward tension of a drill rod of the rotary drilling rig, so that the door type expanding sheet (4) is opened and closed.
4. The hole bottom expanding drill bit capable of being matched with the rotary drilling rig according to claim 1, is characterized in that: the secondary power rod (11) is of a tubular structure, and when the main power rod (2) presses down for a stroke, the A-type secondary power rod (11) or the B-type secondary power rod (16) drives the door-type expanding sheet (4) to expand outwards; when the power rod (2) is pulled upwards to move, the A-type secondary power rod (11) or the B-type secondary power rod (16) can drive the door type expanding sheet (4) to fold inwards.
5. The hole bottom expanding drill bit capable of being matched with the rotary drilling rig according to claim 1, is characterized in that: the door type expanding sheet (4) can cut the wall of a hole when opened, the cylinder body (1) can be closed after the door type expanding sheet is closed, and a power fluted disc (9) on the door type expanding sheet (4) is meshed with a gear on an A-type secondary power rod (11) or a B-type secondary power rod (16) and is opened and closed around a door post (8).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020110388057 | 2020-09-28 | ||
| CN202011038805.7A CN112049574A (en) | 2020-09-28 | 2020-09-28 | Hole bottom expanding drill bit capable of being matched with rotary drilling rig for use |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112160717A true CN112160717A (en) | 2021-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011038805.7A Pending CN112049574A (en) | 2020-09-28 | 2020-09-28 | Hole bottom expanding drill bit capable of being matched with rotary drilling rig for use |
| CN202011199780.9A Pending CN112160717A (en) | 2020-09-28 | 2020-11-02 | Hole bottom expanding drill bit capable of being matched with rotary drilling rig for use |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011038805.7A Pending CN112049574A (en) | 2020-09-28 | 2020-09-28 | Hole bottom expanding drill bit capable of being matched with rotary drilling rig for use |
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| CN (2) | CN112049574A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114775598A (en) * | 2022-04-11 | 2022-07-22 | 中铁四局集团第五工程有限公司 | Multifunctional device for construction of support disc pile and construction method thereof |
-
2020
- 2020-09-28 CN CN202011038805.7A patent/CN112049574A/en active Pending
- 2020-11-02 CN CN202011199780.9A patent/CN112160717A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114775598A (en) * | 2022-04-11 | 2022-07-22 | 中铁四局集团第五工程有限公司 | Multifunctional device for construction of support disc pile and construction method thereof |
| CN114775598B (en) * | 2022-04-11 | 2023-04-25 | 中铁四局集团第五工程有限公司 | Multifunctional device for supporting disc pile construction and construction method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112049574A (en) | 2020-12-08 |
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Application publication date: 20210101 |