CN213510493U - Drill bit connecting structure for CFG pile drilling machine - Google Patents
Drill bit connecting structure for CFG pile drilling machine Download PDFInfo
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- CN213510493U CN213510493U CN202022664025.5U CN202022664025U CN213510493U CN 213510493 U CN213510493 U CN 213510493U CN 202022664025 U CN202022664025 U CN 202022664025U CN 213510493 U CN213510493 U CN 213510493U
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Abstract
The utility model belongs to the technical field of the drilling equipment of CFG stake hole construction usefulness, concrete technical scheme is: a drill bit connecting structure for a CFG pile drilling machine comprises a drill rod and helical blades, wherein the helical blades are arranged along the length direction of the drill rod, a grouting channel is arranged in the drill rod, a drill bit is arranged at the bottom end of the drill rod, one end of the drill bit is hinged to the bottom of the drill rod, the other end of the drill bit is free, a base is fixed at the bottommost end of the helical blades and connected with the drill bit through a hinge, when the drill bit rotates forwards, the hinge contracts, when the drill bit completely covers the drill rod, the grouting channel is closed, and the drilling machine can drill holes; during drill bit antiport, the drill bit is rotatory round articulated department, forms the bottom opening between the bottom of drill bit and drilling rod, and the grout passageway is opened, and the grout passageway begins the feed, and whole simple structure is practical, and response speed is fast.
Description
Technical Field
The utility model belongs to the technical field of the drilling equipment of CFG stake hole construction usefulness, concretely relates to a drill bit connection structure for CFG stake rig.
Background
The CFG pile is a cement fly ash gravel pile, gravel, stone chips, sand and fly ash are mixed with cement and mixed with water, a pile forming machine is used for manufacturing the variable-strength pile with certain strength, and the variable-strength pile, the soil among the piles and the mattress layer form a composite foundation together.
In the single-pile construction process, a drill hole is drilled to a preset depth through a drilling machine, a drill bit is lifted, slurry is filled into the drill hole, in actual construction, after the drill bit is drilled to a designed elevation, in order to facilitate opening of a valve of the drill bit, the drill bit is lifted by 30-50cm and then pumped, and the valve is flushed by utilizing the self weight of concrete and pump pressure. In this case, sediment formation in the range of 30-50cm of the pile end can be caused, so that the concrete is not compact and the bearing capacity of the pile end is affected.
At present, the drill bits used in the process of pumping CFG piles into pile-forming mixed materials in a long spiral drilling pipe are divided into two types according to the arrangement and the opening direction of valves of the drill bits, wherein one type is a side opening door, and the other type is a bottom opening door. Two parabolic valves are designed on two sides of the drill bit, and the two valves are closed in the drilling process, so that mud and sand are prevented from entering a drill rod to block the drill rod. When the pumped concrete reaches the bottom of the drill bit, the two valves are opened, thereby pouring the concrete into the hole. However, the diameter of the drill bit is similar to that of the drilled hole, the side opening door is difficult to open in the actual process, or the opening angle is insufficient, so that slurry cannot be poured into the drilled hole in time, and the quality of the pile body is affected.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem that prior art exists, the utility model provides a drill bit structure for CFG stake rig, simple structure is reasonable, and the valve is opened rapidly, and the pile body shaping is complete.
In order to achieve the above object, the utility model adopts the following technical scheme: a drill bit connecting structure for a CFG pile drilling machine comprises a drill rod and helical blades, wherein the helical blades are arranged along the length direction of the drill rod, a grouting channel is arranged in the drill rod, a drill bit is arranged at the bottom end of the drill rod, one end of the drill bit is hinged to the bottom of the drill rod, the other end of the drill bit is free, when the drill bit is completely covered on the drill rod, the grouting channel is closed, and the drilling machine can drill a hole; the drill bit rotates around the hinged part, a bottom opening is formed between the drill bit and the bottom of the drill rod, the grouting channel is opened, and slurry is timely grouted into the drill hole.
The bottom end of the spiral blade is fixed with a base, the base is connected with the drill bit through a hinge, and when the length of the hinge is shortest, the drill bit is buckled on the drill rod; when the length of the hinge is longest, the drill bit rotates around the hinge, and the valve at the bottom end is opened.
The hinge comprises an upper sliding piece and a lower sliding piece, the top end of the upper sliding piece is hinged with the base, the bottom end of the lower sliding piece is hinged with the side wall of the drill bit, a sliding groove is formed in the lower sliding piece, the bottom end of the upper sliding piece is inserted into the sliding groove and can slide in the sliding groove, when the upper sliding piece slides to the lower limit position of the sliding groove, the length of the hinge is shortest, and a bottom valve is closed; when the upper sliding piece slides to the upper limit position of the sliding groove, the length of the hinge is longest, and the valve at the bottom end is opened.
If the helical blade is in the clockwise rotation direction, the hinge is obliquely arranged along the rotation direction of the helical blade, when the drill rod rotates clockwise, the drill rod drills downwards, the hinge contracts to the minimum length, and the bottom valve is closed; when the drill rod rotates anticlockwise, the drill rod moves upwards, the hinge gradually extends and extends to the maximum length, the valve at the bottom end is opened, and the grouting channel conveys slurry.
If the helical blade is in the anticlockwise rotation direction, the hinge is obliquely arranged along the rotation direction of the helical blade, when the drill rod rotates anticlockwise, the drill rod drills downwards, the hinge contracts to the minimum length, and the bottom valve is closed; when the drill rod rotates clockwise, the drill rod moves upwards, the hinge gradually extends and extends to the maximum length, the valve at the bottom end is opened, and the grouting channel conveys slurry.
Compared with the prior art, the utility model, specifically beneficial effect is embodied in:
one, the utility model discloses a not arranging the side valve on the drilling rod, avoided the difficult technical problem of opening of traditional rig side valve.
Two, the utility model discloses pass through the slip hinge with drill bit and drilling rod and link to each other, during drilling rod forward rotation, the slip hinge shrink, the bottom valve is closed, and the drilling rod is sealed, during drilling rod reverse rotation, has the friction between the soil body in the drilling and the drill bit to under the concrete extrusion, the slip hinge is overhanging, and the drill bit rotates along articulated department, and the bottom valve is opened, and grout passageway begins the feed, and whole simple structure is practical, and response speed is quick.
Drawings
FIG. 1 is a schematic view of the connection of a drill rod to a drill bit.
FIG. 2 is a schematic view of the connection relationship between the drill bit and the drill rod when the drill rod drills.
Fig. 3 is a schematic view of the connection relationship between the drill bit and the drill rod when the drill rod is retracted.
In the figure, 1 is a drill stem, 2 is a helical blade, 3 is a drill bit, 4 is a base, 5 is a hinge, 6 is an upper slider, 7 is a lower slider, and 8 is a chute.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1-2, a drill bit structure for a CFG pile drilling machine comprises a drill rod 1 and helical blades 2, wherein the helical blades 2 are arranged along the length direction of the drill rod 1, a grouting channel is arranged in the drill rod 1, a drill bit 3 is arranged at the bottom end of the drill rod 1, one end of the drill bit 3 is hinged to the bottom of the drill rod 1, the other end of the drill bit 3 is free, when the drill bit 3 completely covers the drill rod 1, the grouting channel is closed, and the drilling machine can drill a hole; the drill bit 3 rotates around the hinged part, a bottom opening is formed between the drill bit 3 and the bottom of the drill rod 1, the grouting channel is opened, and slurry is timely grouted into the drill hole.
A base 4 is fixed at the bottommost end of the spiral blade 2, the base 4 is connected with the drill bit 3 through a hinge 5, and when the length of the hinge 5 is shortest, the drill bit 3 is buckled on the drill rod 1; when the length of the hinge 5 is the longest, the drill bit 3 rotates around the hinge, and the bottom valve is opened.
The hinge 5 comprises an upper sliding piece 6 and a lower sliding piece 7, the top end of the upper sliding piece 6 is hinged with the base 4, the bottom end of the lower sliding piece 7 is hinged with the side wall of the drill bit 3, a sliding groove 8 is arranged in the lower sliding piece 7, the bottom end of the upper sliding piece 6 is inserted into the sliding groove 8 and can slide in the sliding groove 8, when the upper sliding piece 6 slides to the lower limit of the sliding groove 8, the length of the hinge 5 is shortest, and a valve at the bottom end is closed; when the upper slider 6 slides to the upper limit of the sliding chute 8, the length of the hinge 5 is longest, and the bottom valve is opened.
If the helical blade 2 rotates clockwise, the hinge 5 is obliquely arranged along the rotation direction of the helical blade 2, when the drill rod 1 rotates clockwise, the drill rod 1 drills downwards, the hinge 5 contracts to the minimum length, and the bottom valve is closed; when the drill rod 1 rotates anticlockwise, the drill rod 1 moves upwards, the hinge 5 gradually extends and extends to the maximum length, the valve at the bottom end is opened, and the grouting channel conveys slurry.
If the helical blade 2 is in the anticlockwise rotation direction, the hinge 5 is obliquely arranged along the rotation direction of the helical blade 2, when the drill rod 1 rotates anticlockwise, the drill rod 1 drills downwards, the hinge 5 contracts to the minimum length, and the bottom valve is closed; when the drill rod 1 rotates clockwise, the drill rod 1 moves upwards, the hinge 5 gradually extends and extends to the maximum length, the valve at the bottom end is opened, and the grouting channel conveys slurry.
The utility model discloses a working process does:
firstly, a drilling machine is in place and ready for work;
secondly, the drill rod 1 rotates forwards, the drill bit 3 is naturally in a closed state due to the soil pressure, the drill bit 3 and the drill rod 1 are sealed, the drill bit 3 drills downwards to form a hole, and the drilling slag is continuously sent out of the hole until the drill bit 3 drills to a designated design elevation;
and thirdly, the drill rod 1 rotates reversely, under the action of friction force between soil in the drill hole and the hinge 5, the hinge 5 extends outwards, the drill bit 3 rotates along the hinged part, the bottom valve is opened, and the grouting channel starts to supply materials until slurry is poured into the pile.
The utility model has the advantages of being simple in whole structure, convenient operation can in time open the valve, and the pump sending concrete can in time reach the stake end, guarantees the requirement of stake end bearing capacity.
The foregoing is considered as illustrative and not restrictive of the preferred embodiments of the invention, and any modifications, equivalents and improvements made within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (2)
1. A drill bit connecting structure for a CFG pile drilling machine comprises a drill rod (1) and helical blades (2), wherein the helical blades (2) are arranged along the length direction of the drill rod (1), a grouting channel is arranged in the drill rod (1), and a drill bit (3) is arranged at the bottom end of the drill rod (1), and is characterized in that one end of the drill bit (3) is hinged to the bottom of the drill rod (1), and the other end of the drill bit (3) is free;
a base (4) is fixed at the bottommost end of the spiral blade (2), and the base (4) is connected with the drill bit (3) through a hinge (5);
the hinge (5) comprises an upper slider (6) and a lower slider (7), the top end of the upper slider (6) is hinged to the base (4), the bottom end of the lower slider (7) is hinged to the side wall of the drill bit (3), a sliding groove (8) is formed in the lower slider (7), and the bottom end of the upper slider (6) is inserted into the sliding groove (8) and can slide in the sliding groove (8).
2. A bit connection for a CFG pile drill, according to claim 1, characterized in that the hinge (5) is arranged obliquely in the turning direction of the helical blade (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022664025.5U CN213510493U (en) | 2020-11-18 | 2020-11-18 | Drill bit connecting structure for CFG pile drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022664025.5U CN213510493U (en) | 2020-11-18 | 2020-11-18 | Drill bit connecting structure for CFG pile drilling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213510493U true CN213510493U (en) | 2021-06-22 |
Family
ID=76424456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022664025.5U Active CN213510493U (en) | 2020-11-18 | 2020-11-18 | Drill bit connecting structure for CFG pile drilling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213510493U (en) |
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2020
- 2020-11-18 CN CN202022664025.5U patent/CN213510493U/en active Active
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