CN214196192U - Improved structure of drill bit of pile ramming and expanding machine - Google Patents
Improved structure of drill bit of pile ramming and expanding machine Download PDFInfo
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- CN214196192U CN214196192U CN202120138347.8U CN202120138347U CN214196192U CN 214196192 U CN214196192 U CN 214196192U CN 202120138347 U CN202120138347 U CN 202120138347U CN 214196192 U CN214196192 U CN 214196192U
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Abstract
The utility model discloses an improved structure of a drill bit of a tamping pile expanding machine, belonging to a drilling tool for building foundation construction; aims to provide a drill bit of a pipe sinking ramming pile expander, which has simple structure, high drilling efficiency and long service life. It comprises a connecting pipe fixedly connected with the immersed tube into a whole in a butt joint way, and four valves pivoted on the connecting pipe and in a tapered tile-shaped structure; four groove-shaped mounting notches (7) are uniformly distributed on the tube wall at the bottom end of the connecting tube (3), and a pin shaft (4) is fixed in each mounting notch (7); the top end of each valve (5) is provided with a mounting lug (6) which is connected with the valve into a whole and is matched with the mounting notch (7), and each mounting lug (6) is provided with a waist-shaped hole (10); each valve (5) is pivoted with the corresponding pin shaft (4) through a waist-shaped hole (10). The utility model has small drilling resistance, uneasy damage and high construction efficiency; is an improved structure of a drill bit of a pipe sinking ramming pile expanding machine.
Description
Technical Field
The utility model relates to an improved structure of a drill bit of a immersed tube pile driver, in particular to an improved structure of a drill bit of a pile driver; belongs to a drilling tool for building foundation construction.
Background
The pipe-sinking ramming pile-expanding machine is a special equipment for foundation construction, and is generally formed from upright column equipped with guide device and pulley block, sinking pipe placed on the upright column by means of the described guide device, vibrating device fixed on the top portion of the sinking pipe and steel rope connected between the vibrating device and winding machine (refer to CN 204199284U).
The improved structure of drill bit for pile-driving machine is a special drilling tool installed at the bottom end of pile-driving machine, and is formed from connecting pipe butt-jointed with immersed tube and four movable flaps which are pivoted on the connecting pipe and formed into a conical tile-like structure, and the four movable flaps are closed to form a driving cone. The following disadvantages are mainly present:
1) the valve is pivoted with the mounting seat which is fixed on the surface of the connecting pipe and is close to the bottom end through the mounting lug, the mounting seat can form larger resistance in the drilling process, and the mounting seat, the mounting lug and the pin shaft are easy to wear due to exposure.
2) In order to increase the rigidity of the flaps, reinforcing ribs are usually added on the outer surface of each flap, but the reinforcing ribs further increase the drilling resistance of the rammed cone, and the drilling efficiency is reduced.
3) In the drilling process, the mounting seat and the mounting lug of the valve can form larger shearing force on the pin shaft; therefore, the pin shaft, the mounting lug or the mounting seat are easy to damage and even break.
4) The mounting seat, the mounting lug and the pin shaft are exposed, so that the hanging and rubbing with rock soil are easily formed during the drill pulling, and the drill pulling is difficult.
In conclusion, the structure of the improved structure of the drill bit of the traditional pipe sinking ramming pile expander is unreasonable, and needs to be improved urgently.
Disclosure of Invention
The above-mentioned defect to prior art exists, the utility model aims at providing a simple structure, creep into efficient, long service life's ramming pile expander drill bit and improve structure.
In order to achieve the above purpose, the utility model adopts the following technical scheme: it comprises a connecting pipe fixedly connected with the immersed tube into a whole in a butt joint way, and four valves pivoted on the connecting pipe and in a tapered tile-shaped structure; four groove-shaped mounting notches are uniformly distributed on the tube wall at the bottom end of the connecting tube, and a pin shaft is fixed in each mounting notch; the top end of each valve is provided with an installation ear which is connected with the valve into a whole and is matched with the installation notch, and each installation ear is provided with a waist-shaped hole; each valve is pivoted with the corresponding pin shaft through a waist-shaped hole.
The outer diameter and the wall thickness of the connecting pipe are both larger than those of the immersed pipe, and a plurality of reinforcing rib plates are uniformly distributed between the outer wall of the immersed pipe and the outer wall of the connecting pipe; a transition taper sleeve is fixed between the outer wall of the immersed tube and the connecting tube and shields each reinforcing rib plate by the transition taper sleeve; reinforcing ribs are fixed on the inner surface of each valve; after the valves are closed, a cone of 60 degrees is formed.
Compared with the prior art, the utility model discloses owing to adopted above-mentioned technical scheme, consequently have following advantage:
1) the bottom end of the connecting pipe is provided with an installation notch matched with the installation lug, so that the installation lug can be hidden in the installation notch; not only can avoid the friction and the hanging abrasion between the mounting seat, the mounting lug and the pin shaft and the rock soil and reduce the drilling resistance, but also has good pile hole forming effect and smooth hole wall.
2) On the basis of the structure, the waist-shaped holes are formed in the mounting lugs, so that the top ends of the valves positioned on two sides of the mounting lugs can be tightly attached to the bottom end of the connecting pipe; therefore, the axial force of drilling is guaranteed to be borne by the connecting pipe, the pin shaft, the mounting lug and the mounting notch are not affected by the axial shearing force, and the service life of the drill bit is prolonged.
3) The reinforcing ribs originally positioned on the outer surface of the valve are changed into the reinforcing ribs arranged on the inner surface of the valve, so that the valve can be ensured to have enough strength and rigidity, the phenomenon that the reinforcing ribs are exposed to increase the frictional resistance can be avoided, and the drilling construction efficiency is improved.
4) Because a plurality of reinforcing rib plates are additionally arranged at the welding position of the immersed tube and the connecting tube, and the transition taper sleeves shielding the reinforcing rib plates are welded between the immersed tube and the connecting tube, the strength of the welding position of the immersed tube and the connecting tube can be greatly enhanced, and the soil resistance in the process of lifting the immersed tube and the connecting tube can be reduced.
To sum up, the utility model has the advantages of simple structure, high, the long service life of efficiency of construction.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a schematic structural view of the flap of the present invention in an open state;
FIG. 4 is a cross-sectional view B-B of FIG. 2;
FIG. 5 is a top view of FIG. 1;
FIG. 6 is an enlarged view taken at I in FIG. 1;
fig. 7 is a schematic diagram of the drilling working state of the utility model;
FIG. 8 is a schematic structural view of a drill bit improved structure of a conventional pipe sinking ramming pile-expanding machine;
FIG. 9 is a cross-sectional view taken at C-C of FIG. 8;
fig. 10 is a top view of fig. 9.
In the figure: the steel wire rope pile comprises a sinking pipe 1, a transition taper sleeve 2, a connecting pipe 3, a pin shaft 4, a valve 5, a mounting lug 6, a mounting notch 7, a reinforcing rib 8, a reinforcing rib plate 9, a waist-shaped hole 10, a first steel wire rope 11, a second steel wire rope 12, a vibrating device 13, a pile hole 14 and a mounting seat 15.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in FIGS. 1-6: the connecting pipe 3 is in butt joint with the bottom end of the immersed tube 1 into a whole in a welding mode, four groove-shaped mounting notches 7 are uniformly distributed on the pipe wall of the bottom end of the connecting pipe 3, and a pin shaft 4 is fixed in each mounting notch 7; the top ends of the four conical tile-shaped valves 5 are respectively provided with mounting lugs 6 which are connected with the valves into a whole and are matched with the mounting notches 7, and each mounting lug 6 is provided with a waist-shaped hole 10; each valve 5 is pivoted with the corresponding pin shaft 4 through a waist-shaped hole 10. When the valves 5 are closed, an inverted cone-shaped rammed vertebral body with a large upper part and a small lower part is formed.
In order to avoid the damage of the immersed tube 1, the outer diameter and the wall thickness of the connecting tube 3 are both larger than those of the immersed tube 1; in order to ensure the reliable connection between the connecting pipe 3 and the immersed tube 1, a plurality of triangular reinforcing rib plates 9 are uniformly welded between the outer wall of the immersed tube 1 and the top end of the connecting pipe 3.
In order to reduce the resistance during the drilling and reduce the friction and hanging between the connecting pipe 3 and the rock soil, a transition taper sleeve 2 with a small upper part and a large lower part is welded between the outer wall of the immersed tube 1 and the top end of the connecting pipe 3, and the transition taper sleeve covers and shields each reinforcing rib plate 9.
In order to increase the rigidity of the flaps 5 and avoid the increase of drilling resistance, a reinforcing rib 8 is welded on the inner surface of each flap 5.
In order to reduce the drilling resistance and improve the drilling efficiency and simultaneously consider the rigidity and the strength of the rammed and expanded cone body, the taper of the rammed and expanded cone body is 60 degrees.
As shown in fig. 7, when in use, the connecting pipe 3 is connected with the bottom end of the immersed tube 1 into a whole in a butt joint mode by welding, then the immersed tube 1 is supported and erected on the ground by a column (not shown) of a tamping pile expander, and a vibrating device 13 is fixed at the top end of the immersed tube 1; a first steel rope 11 is connected between the vibration device and a winch (not shown in the figure) through a first fixed pulley block (not shown in the figure) so as to realize the downward drilling of the immersed tube 1; a second steel rope 12 is connected between the vibration device 13 and the winch through a second fixed pulley block (not shown in the figure) so as to realize the lifting and the drilling of the immersed tube 1.
The working principle is as follows:
when drilling down, fold four valve 5 with the string earlier and cramp and form the ramming of obconical form and expand the centrum, immersed tube 1 downstream under first steel cable 11 decurrent pulling force and vibrating device 13's vibrational force combined action, the utility model discloses the drill bit is to doing drilling and ramming and is expanded the motion downwards, get into the soil layer. In the drilling process, the top ends of the valves 5 positioned at the two sides of the mounting lug 6 are tightly attached to the bottom end of the connecting pipe 3, so that the axial force of drilling is completely born by the connecting pipe 3; the pin shaft 4, the mounting lug 6 and the mounting notch 7 are not affected by shearing force, so that the service life of the drill bit is prolonged. When the drilling reaches the preset depth, the sinking tube 1 drives the drill bit to lift upwards for a certain distance under the action of the upward pulling force of the second steel rope 12, and each valve 5 naturally opens around the pin shaft 4 under the action of gravity and the vibrating force of the vibrating device 13 (at this time, the string for hooping the valve 5 is already broken and falls off in the drilling process). Concrete slurry is poured into the pile hole 14 through a pouring opening formed in the pipe wall of the immersed pipe 1 (see CN 204199284U), and then the concrete is tamped by a gravity ram suspended in the immersed pipe 1 (see CN 204199284U). The whole concrete pile can be poured by repeating the operation.
Comparing FIGS. 1-6 with FIGS. 8-10, it can be seen that: the mounting seat 15 of the improved structure of the drill bit of the traditional immersed tube pile driving machine is exposed out of the outer cylindrical surface of the connecting pipe 3, so that the drilling resistance is large, the abrasion is serious, the forming effect of the pile hole 14 is poor, and the hole wall is rough. Moreover, since the mounting seat 15, the pin 4, and the mounting lug 6 are subjected to the axial force to form shear during drilling, the mounting seat 15, the pin 4, or the mounting lug 6 are easily broken. Thirdly, the reinforcing ribs 8 on the surface of the valve 5 can block drilling movement, so that the drilling construction efficiency is influenced, and the reinforcing ribs 8 are easily worn quickly.
The test shows, through the utility model discloses after the improvement, above-mentioned defect can effectively be eliminated, excellent in use effect.
Claims (6)
1. An improved structure of a drill bit of a pile ramming and expanding machine comprises a connecting pipe fixedly and integrally connected with a sinking pipe in a butt joint mode, and four valves which are pivoted on the connecting pipe and are of a conical tile-shaped structure; the method is characterized in that: four groove-shaped mounting notches (7) are uniformly distributed on the tube wall at the bottom end of the connecting tube (3), and a pin shaft (4) is fixed in each mounting notch (7); the top end of each valve (5) is provided with a mounting lug (6) which is connected with the valve into a whole and is matched with the mounting notch (7), and each mounting lug (6) is provided with a waist-shaped hole (10); each valve (5) is pivoted with the corresponding pin shaft (4) through a waist-shaped hole (10).
2. The improved structure of the drill bit of the ramming pile driver according to claim 1, characterized in that: the outer diameter and the wall thickness of the connecting pipe (3) are both larger than those of the immersed pipe (1), and a plurality of reinforcing rib plates (9) are uniformly distributed between the outer wall of the immersed pipe (1) and the outer wall of the connecting pipe (3).
3. The improved structure of the drill bit of the ramming pile driver according to claim 1, characterized in that: a transition taper sleeve (2) is fixed between the outer wall of the immersed tube (1) and the connecting tube (3), and the transition taper sleeve covers and shields each reinforcing rib plate (9).
4. The improved structure of the drill bit of the tamping-pile-expanding machine according to any one of the claims 1 to 3, which is characterized in that: the inner surface of each valve (5) is fixed with a reinforcing rib (8).
5. The improved structure of the drill bit of the tamping-pile-expanding machine according to any one of the claims 1 to 3, which is characterized in that: after the valves (5) are folded, a cone with 60 degrees is formed.
6. The improved structure of the drill bit of the ramming pile driver according to claim 4, characterized in that: after the valves (5) are folded, a cone with 60 degrees is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120138347.8U CN214196192U (en) | 2021-01-19 | 2021-01-19 | Improved structure of drill bit of pile ramming and expanding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120138347.8U CN214196192U (en) | 2021-01-19 | 2021-01-19 | Improved structure of drill bit of pile ramming and expanding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214196192U true CN214196192U (en) | 2021-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120138347.8U Active CN214196192U (en) | 2021-01-19 | 2021-01-19 | Improved structure of drill bit of pile ramming and expanding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214196192U (en) |
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2021
- 2021-01-19 CN CN202120138347.8U patent/CN214196192U/en active Active
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