CN111173458A - Drill bit connection structure for cast-in-situ bored pile - Google Patents
Drill bit connection structure for cast-in-situ bored pile Download PDFInfo
- Publication number
- CN111173458A CN111173458A CN202010170594.6A CN202010170594A CN111173458A CN 111173458 A CN111173458 A CN 111173458A CN 202010170594 A CN202010170594 A CN 202010170594A CN 111173458 A CN111173458 A CN 111173458A
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- Prior art keywords
- drill bit
- plug
- rod
- drill
- bored pile
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Links
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 12
- 230000036346 tooth eruption Effects 0.000 claims description 15
- 238000005553 drilling Methods 0.000 claims description 12
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 11
- 230000003139 buffering effect Effects 0.000 abstract description 2
- 239000011435 rock Substances 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
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- 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
- E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
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- 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
- E21B12/00—Accessories for drilling tools
- E21B12/04—Drill bit protectors
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
The invention relates to the technical field of cast-in-situ bored pile construction, in particular to a drill bit connecting structure for a cast-in-situ bored pile. Comprises a drill bit, a connecting assembly and a drill rod; the connecting assembly comprises a connecting block, a connecting plug and a connecting rod; the drill bit is elastically and slidably connected in the accommodating groove of the connecting block through the connecting rod; the drill rod is provided with a slot corresponding to the connecting plug, the slot is provided with a clamping portion corresponding to the plug-in, and the connecting plug is clamped on the drill rod through the matching of the plug-in and the clamping portion, so that the drill bit, the connecting assembly and the drill rod are firmly connected in an elastic mode. The connecting rod of this structure makes the drill bit rock from top to bottom through elastic sliding of first limiting plate and elastic component in the holding tank of drill bit through this sliding structure, and the drill bit has certain buffering space when contact ground to improve the crashproof performance of drill bit, prevent that the drill bit from directly striking ground and causing the fracture of drill bit junction when using, the reliability of greatly increased drill bit.
Description
Technical Field
The invention relates to the technical field of cast-in-situ bored pile construction, in particular to a drill bit connecting structure for a cast-in-situ bored pile.
Background
The cast-in-place pile is a pile formed by forming a pile hole in foundation soil through mechanical drilling, steel pipe soil extrusion or manual excavation and the like on an engineering site, placing a reinforcement cage and cast-in-place concrete in the pile hole, and according to different hole forming methods, the cast-in-place pile can be divided into a immersed tube cast-in-place pile, a cast-in-place pile and the like. Various geological environments can be encountered in engineering construction, and reasonable measures are taken aiming at different geological environments, so that the engineering construction efficiency can be greatly improved. The cast-in-situ bored pile is a foundation structure form widely used in engineering, and is always favored by the engineering industry because the construction has the characteristics of simple operation and strong applicability.
The drill bit for the cast-in-situ bored pile at the present stage is often damaged due to collision with a hard object when in use, and meanwhile, the drill bit at the present stage is often too large in stress at the joint when in rotation, so that equipment is easily broken, the drill bit needs to be reassembled to continue construction, and the problems of low construction efficiency and increased construction cost exist. Therefore, how to solve the problem that the drill bit for the cast-in-situ bored pile is easy to break is an important problem in the field.
Disclosure of Invention
The present invention provides a drill connecting structure for a bored pile, which overcomes at least one of the above-mentioned drawbacks (disadvantages) of the prior art.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a drill bit connecting structure for a cast-in-situ bored pile comprises a drill bit, a connecting assembly and a drill rod;
the connecting assembly comprises a connecting block, a connecting plug and a connecting rod;
the drill bit is provided with an accommodating groove, one end of the connecting rod is fixedly connected with one side of the connecting block, the other end of the connecting rod is in limit clamping connection in the accommodating groove and is abutted against the bottom of the accommodating groove through an elastic piece, and the connecting block is elastically and slidably connected in the accommodating groove of the drill bit through the connecting rod;
one end of the connecting plug is fixedly arranged on the other side of the connecting block, and the other end of the connecting plug is provided with a cavity and a plug-in unit which can be elastically retracted into the cavity; the drill rod is provided with a slot corresponding to the connecting plug, the slot is provided with a clamping portion corresponding to the plug-in, and the connecting plug is clamped on the drill rod through the matching of the plug-in and the clamping portion, so that the drill bit, the connecting assembly and the drill rod are firmly connected in an elastic mode.
Furthermore, a fixing plate is arranged at the bottom of the drill bit, a plurality of cutting teeth are arranged on the peripheries of the drill bit and the fixing plate, and the cutting teeth are symmetrically arranged along the axial line of the drill bit and the fixing plate.
Furthermore, the drill bit and the fixing plate are provided with fixing grooves corresponding to the cutting teeth, and the cutting teeth are fixedly arranged on the fixing grooves through threaded connecting pieces.
Further, the connecting assembly further comprises an insert; the insert is fixedly arranged on the connecting block and arranged on the same side as the connecting plug; the drill rod is provided with an embedding groove matched with the insert, and the drill rod and the connecting block are embedded and connected in a matched mode through the insert and the embedding groove to achieve horizontal limiting.
Furthermore, the insert is fixedly arranged on the connecting block by bonding.
Further, the connecting rod is provided with first limiting plate, first limiting plate fixed mounting is at the tip that the connecting rod is located the holding tank to carry out the cooperation now with the notch of holding tank, thereby be in with the spacing joint of connecting rod in the holding tank of drill bit.
Further, two plug-in units are arranged; the cavity is symmetrically provided with two openings at the horizontal position of the connecting plug, the plug-in is clamped and limited at the opening of the cavity through a second limiting plate, a thrust spring is arranged between the plug-in, and the plug-in is elastically telescopic on the connecting plug through the thrust spring.
Furthermore, the plug-in components are arranged close to one end of the drill rod in a chamfering mode.
Further, the shape of the drill bit is an inverted cone.
Further, the elastic member is a spring.
The invention has the following beneficial effects:
(1) the connecting rod of the structure elastically slides in the accommodating groove of the drill bit through the first limiting plate and the elastic piece, the drill bit can swing up and down through the sliding structure, and the drill bit has a certain buffer space when contacting the ground, so that the anti-collision performance of the drill bit is improved, the fracture of the drill bit joint caused by the fact that the drill bit directly impacts the ground when in use is prevented, and the reliability of the drill bit is greatly improved;
(2) the connecting plug is provided with the thrust spring, so that the plug-in can stretch out and draw back in the cavity, the plug-in is clamped into the clamping part of the slot of the drill rod through the telescopic structure, the connection between the connecting block and the drill rod is completed, equipment can be effectively prevented from loosening through continuous popping of the telescopic structure, and meanwhile, the connecting part of the drill bit and the drill rod is reinforced through the insert block and the embedding groove, so that the equipment is prevented from being damaged due to overlarge stress, the drilling efficiency of the cast-in-place pile is effectively improved, and the construction cost is reduced;
(3) the cutting teeth are fixedly arranged on the fixed plate and the drill bit through the threaded connecting piece, so that the connection part of the cutting teeth is prevented from being twisted off when the equipment rotates, and the reliability of the drill bit is improved.
Drawings
Fig. 1 is a schematic structural view of a drill bit connection structure for a cast-in-situ bored pile according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the connection between the connection plug and the drill rod according to the embodiment of the invention.
FIG. 3 is a partial block diagram of a cutting tooth assembly according to an embodiment of the present invention.
Wherein:
the drill bit is 1, the accommodating groove is 11, the fixing plate is 12, the cutting teeth are 13, and the threaded connecting piece is 14;
the connecting assembly is 2, the connecting block is 21, the connecting rod is 22, the connecting plug is 23, the insert is 24, the elastic element is 221, the first limit plate is 222, the plug-in unit is 231, the thrust spring is 232, and the second limit plate is 233;
the drill rod is 3, the inserting groove is 31, the embedding groove is 32, and the clamping part is 311.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
The embodiment provides a drill bit connecting structure for a bored pile, and referring to fig. 1 to 3, the drill bit connecting structure comprises a drill bit 1, a connecting assembly 2 and a drill rod 3; wherein coupling assembling 2 includes connecting block 21, connecting plug 23 and connecting rod 22, and connecting plug 23 and connecting rod 22 set up respectively in the relative both sides of connecting block 21, and connecting block 21 passes through connecting plug 23 and connecting rod 22 respectively and drill bit 1, drilling rod 3 joint to make coupling assembling 2 can accomplish the firm elastic connection between drill bit 1 and the drilling rod 3.
Specifically, as shown in fig. 1, the drill bit 1 is provided with an accommodating groove 11, one end of the connecting rod 22 is fixedly mounted on the connecting block 21, and the other end of the connecting rod is clamped in the accommodating groove 11 of the drill bit 1, more specifically, the accommodating groove 11 is internally provided with an elastic member 221, the elastic member 221 can be a compression spring, and of course, other suitable elastic devices can be provided, and in this embodiment, the elastic member 221 is a compression spring. One end of the elastic member 221 abuts against the inner wall of the accommodating groove 11 opposite to the opening, and the other end abuts against the connecting rod 22, so that the connecting rod 22 can elastically slide in the accommodating groove 11. When the drill bit 1 collides with the ground, the top connecting rod 22 can slide in the accommodating groove 11 in a buffering manner through the elastic piece 221, so that the drill bit 1 is prevented from being broken due to excessive stress at the joint when colliding with a hard object.
Preferably, the tip department of connecting rod 22 in holding tank 11 is provided with first limiting plate 222, and the notch department of holding tank 11 is formed with the lug with first limiting plate 222 looks joint, and first limiting plate 222 can carry out the joint with the lug to it is spacing in holding tank 11 of drill bit 1 with connecting rod 22. Further preferably, the shape of the receiving groove 11 is a rectangular groove, and the width of the receiving groove 11 is greater than the width of the first stopper, so as to ensure that the connecting rod 22 can elastically slide in the receiving groove 11. Specifically, the first limiting block and the connecting rod 22 are fixedly connected by bonding.
In the aspect of the connection plug 23, as shown in fig. 2, one end of the connection plug 23 is fixedly installed on the connection block 21, the end of the other end is provided with a cavity and two plug-in units 231, the cavity is provided with openings at both horizontal sides of the connection plug 23, and the two plug-in units 231 can be respectively and elastically retracted into the openings of the connection plug 23. Correspondingly, the drill rod 3 is provided with a slot 31 corresponding to the connecting plug 23, the slot 31 is provided with a clamping portion 311 corresponding to the plug-in 231, the connecting plug 23 is inserted into the slot 31 of the drill rod 3 through the connecting block 21, the plug-in 231 is elastically received into the cavity in the inserting process, and the clamping portion 311 is popped up to realize clamping. The connecting plug 23 is clamped in the slot 31 of the drill rod 3 through the matching of the plug 231 and the clamping part 311, so that the connecting block 21 is stably connected with the drill rod 3.
Preferably, the end of the plug-in 231 in the cavity is connected with a second limiting plate 233, and the plug-in 231 is clamped at the opening of the cavity through the second limiting plate 233, so as to ensure that the plug-in 231 cannot be disengaged. Meanwhile, a thrust spring 232 is arranged in the cavity, the thrust spring 232 is horizontally arranged in the cavity, and two ends of the thrust spring 232 are respectively abutted against the two plug-in components 231, so that the plug-in components 231 can elastically stretch in the connecting plug 23. It is further preferred that the insert 231 is chamfered near one end of the drill rod 3 to ensure that the insert 231 is resiliently received in the cavity smoothly when the connector 23 is inserted into the socket 31.
Preferably, the connecting assembly 2 further comprises an insert 24, and the insert 24 is fixedly mounted on the connecting block 21 and is arranged on the same side as the connecting plug 23. Correspondingly, the drill rod 3 is provided with an embedding groove 32 matched with the insert 24, and when the connecting plug 23 is connected with the drill rod 3, the insert 24 is embedded into the embedding groove 32, so that the horizontal limiting between the connecting block 21 and the drill rod 3 is realized, the connection between the connecting block 21 and the drill rod 3 is firm, and the reliability of the device is improved. Specifically, the insert 24 and the connecting block 21 are connected by bonding. It is further preferred that two inserts 24 are provided on the connecting block 21, and the two inserts 24 are oppositely provided along the connecting plug 23.
The benefit of this structure lies in, this structure is connected drill bit 1 and connecting block 21 through connecting rod 22, and realize being connected of drilling rod 3 and connecting block 21 through connecting plug 23, thereby accomplish drilling rod 3 and drill bit 1's firm connection, and connecting rod 22 is through first limiting plate 222 and elastic component 221 elastic sliding in the holding tank 11 of drill bit 1, make drill bit 1 rock from top to bottom through this sliding structure, drill bit 1 has certain buffer space when contacting ground, thereby improve drill bit 1's crashworthiness, prevent that drill bit 1 from directly striking ground when using and causing the fracture of drill bit 1 junction, greatly increased drill bit 1's reliability.
In addition, the connecting plug 23 enables the plug-in 231 to stretch out and draw back in the cavity by setting the thrust spring 232, and the plug-in 231 is clamped into the clamping portion 311 of the slot 31 of the drill rod 3 through the telescopic structure, so that the connection between the connecting block 21 and the drill rod 3 is completed, and the equipment can be effectively prevented from loosening by continuously popping up the telescopic structure. Meanwhile, the connecting block 21 and the drill rod 3 are horizontally limited and clamped through the insert block 24 and the embedding groove 32, the joint of the connecting block and the drill rod is reinforced, and the damage to equipment caused by overlarge stress is prevented. This structure is connected drill bit 1 and drilling rod 3 through coupling assembling 2, can effectively improve the fastness of both junctions, the cracked condition of drill bit 1 appears when preventing the construction to effectively improve bored concrete pile drilling efficiency, reduce construction cost.
Example two
The present embodiment is similar to the present embodiment, as shown in fig. 2-3, specifically, in the present embodiment, the drill bit 1 is in an inverted cone shape, the bottom of the drill bit 1 is provided with a fixing plate 12, and the peripheries of the drill bit 1 and the fixing plate 12 are provided with a plurality of cutting teeth 13 along the central axis of the drill bit 1 in an outward direction for rapidly and effectively drilling earth. Specifically, the drill bit 1 and the fixing plate 12 are provided with fixing grooves corresponding to the cutting teeth 13, and the cutting teeth 13 are installed in the fixing grooves through threads of the threaded connecting piece 14, so that the connection between the cutting teeth 13 and the drill bit 1 and the fixing plate 12 is firm, the connection part of the cutting teeth 13 is prevented from being twisted off when the equipment rotates, and the reliability of the drill bit 1 is improved.
Preferably, the threaded connection 14 is a threaded block and the fixation plate is annular in shape.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A drill bit connecting structure for a cast-in-situ bored pile is characterized by comprising a drill bit (1), a connecting assembly (2) and a drill rod (3);
the connecting assembly (2) comprises a connecting block (21), a connecting rod (22) and a connecting plug (23);
the drill bit (1) is provided with an accommodating groove (11), one end of a connecting rod (22) is fixedly connected with one side of a connecting block (21), the other end of the connecting rod is in limit clamping connection in the accommodating groove (11) and is abutted against the bottom of the accommodating groove (11) through an elastic piece (221), and the connecting block (21) is elastically and slidably connected in the accommodating groove (11) of the drill bit (1) through the connecting rod (22);
one end of the connecting plug (23) is fixedly arranged on the other side of the connecting block (21), and the other end of the connecting plug is provided with a cavity and an insert (231) which can be elastically received in the cavity; be equipped with on drilling rod (3) with corresponding slot (31) of connecting plug (23), just slot (31) are equipped with joint portion (311) corresponding with plug-in components (231), connecting plug (23) are in through the cooperation joint of plug-in components (231) with joint portion (311) on drilling rod (3) to realize the elasticity firm connection of drill bit (1), coupling assembling (2) and drilling rod (3).
2. The drill bit connecting structure for the bored pile according to claim 1, wherein a fixing plate (12) is provided at the bottom of the drill bit (1), and a plurality of cutting teeth (13) are provided outwardly on the outer peripheries of the drill bit (1) and the fixing plate (12) along the central axis of the drill bit (1).
3. The drill bit connection structure for a bored pile according to claim 2, wherein fixing grooves corresponding to the cutting teeth (13) are provided on the drill bit (1) and the fixing plate (12), and the cutting teeth (13) are fixedly mounted on the fixing grooves by a screw connection member (14).
4. A drill connection structure for a bored pile according to claim 1, wherein the connection assembly (2) further includes an insert (24); the insert (24) is fixedly arranged on the connecting block (21) and arranged at the same side as the connecting plug (23); the drill rod (3) is provided with an embedding groove (32) matched with the insert (24), and the drill rod (3) and the connecting block (21) are embedded and connected through the insert (24) and the embedding groove (32) to realize horizontal limiting.
5. The drill bit connecting structure for the bored pile according to claim 4, wherein there are two of the insert blocks (24), and the two insert blocks (24) are symmetrically arranged along the connecting plug (23).
6. The drill bit connecting structure for the bored pile according to any one of claims 1 to 5, wherein the connecting rod (22) is provided with a first limiting plate (222), and the first limiting plate (222) is fixedly installed at an end of the connecting rod (22) inserted into the accommodating groove (11) and is in limiting fit with a notch of the accommodating groove (11), so that the connecting rod (22) is in limiting clamping connection with the accommodating groove (11) of the drill bit (1).
7. A drill connection structure for a bored pile according to any one of claims 1 to 5, wherein there are two said inserts (231); the cavity is symmetrically provided with two openings at the horizontal position of the connecting plug (23), the plug-in unit (231) is clamped and limited at the opening of the cavity through a second limiting plate (233), a thrust spring (232) is arranged between the plug-in units (231), and the plug-in units (231) elastically stretch out and draw back on the connecting plug (23) through the thrust spring (232).
8. Drill bit connection for a bored pile according to claim 7, wherein the insert (231) is chamfered near one end of the drill rod (3).
9. A drill bit connecting structure for a bored pile according to any one of claims 1 to 4, wherein the shape of the drill bit (1) is an inverted cone.
10. A drill connection structure for a bored pile according to claim 1, wherein said elastic member (221) is a spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010170594.6A CN111173458A (en) | 2020-03-12 | 2020-03-12 | Drill bit connection structure for cast-in-situ bored pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010170594.6A CN111173458A (en) | 2020-03-12 | 2020-03-12 | Drill bit connection structure for cast-in-situ bored pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111173458A true CN111173458A (en) | 2020-05-19 |
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ID=70647242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010170594.6A Pending CN111173458A (en) | 2020-03-12 | 2020-03-12 | Drill bit connection structure for cast-in-situ bored pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111173458A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177544A (en) * | 2020-09-28 | 2021-01-05 | 沧州格锐特钻头有限公司 | Detachable roller cone and PDC combined drill bit |
| CN112901076A (en) * | 2021-04-09 | 2021-06-04 | 西安科技大学 | Horizontal drilling tool without damaging permeability of tailing sand |
-
2020
- 2020-03-12 CN CN202010170594.6A patent/CN111173458A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177544A (en) * | 2020-09-28 | 2021-01-05 | 沧州格锐特钻头有限公司 | Detachable roller cone and PDC combined drill bit |
| CN112901076A (en) * | 2021-04-09 | 2021-06-04 | 西安科技大学 | Horizontal drilling tool without damaging permeability of tailing sand |
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