CN211777205U - Spiral semi-extrusion soil drill bit suitable for large aperture - Google Patents

Abstract

The utility model discloses a half crowded native drill bit of spiral that is adapted to large aperture, including connector, storage cylinder, bottom plate, location core, cutting tooth and depression bar system, the connector sets up at storage cylinder top, the bottom plate sets up in storage cylinder bottom, and bottom plate one side is articulated with the storage cylinder, is provided with into soil mouthful on the bottom plate, and the bottom plate passes through depression bar system and promotes to open, location core and cutting tooth all set up on the bottom plate, the storage cylinder includes drum and circular cone, the outer wall circumference of drum evenly is provided with many and leads the sediment strip, the outer wall of circular cone is provided with helical blade. Adopt the spiral of this application to be adapted to large aperture half crowded soil drill bit, crowd soil jointly through drum and circular cone, improved crowded soil effect greatly to ensure pile foundation quality, practiced thrift the cost simultaneously, still have green's advantage.

Description

Spiral semi-extrusion soil drill bit suitable for large aperture

Technical Field

The utility model relates to a drill bit technical field, concretely relates to be adapted to crowded native drill bit of spiral half of large aperture.

Background

When the load of a building is large and a foundation adopts a rotary drilling pile, if a soft soil layer of the foundation is thick (generally refers to backfill soil with more than 4 meters and mucky soil) or a karst cave exists, a mud protective wall is adopted to form a hole which is easy to collapse, and a steel protective cylinder is adopted to form a hole by protective wall, so that the operation of descending and pulling the protective cylinder is complex, and time and labor are wasted. Aiming at the geological conditions, the spiral soil (stone) squeezing drill bit hole forming construction is adopted, so that the hole forming success rate of the pile machine in the construction process can be improved, and the use safety of machine equipment in the construction process can be improved, thereby being beneficial to saving the cost and ensuring the pile foundation quality. The construction method can be used for obtaining good social comment, better economic benefit and good environmental protection effect.

To big aperture pile (the diameter is greater than 1.2 meters usually) drilling that the volume of dumping is big, often adopt middle mode of dumping, the main part of drill bit is storage barrel structure promptly, and the soil inlet is seted up to the bottom of storage barrel, and along with the rotatory drilling of storage barrel, the soil body gets into the storage barrel from the soil inlet progressively and prestores, then lifts up the storage barrel, opens the bottom plate and arranges the soil. The drill bit with the structure has the following disadvantages: in the drilling process, the soil squeezing effect is poor, the compactness of a pile hole is affected, the collapse phenomenon may occur, and the drill is buried seriously. The spiral soil-squeezing blades in the cone structure only squeeze soil bodies through the exposed continuous inclined planes, and a small amount of soil bodies are continuously conveyed from bottom to top by the spiral soil-squeezing blades in the squeezing process, so that the soil squeezing of the cone structure is not sufficient.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a be adapted to the crowded native drill bit of spiral half of large aperture to improve crowded soil effect, ensure pile foundation quality when the construction is crept into, practice thrift cost, green simultaneously.

The utility model discloses an above-mentioned problem is solved to following technical means: the utility model provides a be adapted to half crowded native drill bit of spiral of large aperture, includes connector, storage cylinder, bottom plate, location core, cutting teeth and compression bar system, the connector sets up at the storage cylinder top, the bottom plate sets up in storage cylinder bottom, and bottom plate one side is articulated with the storage cylinder, is provided with into soil mouthful on the bottom plate, and the bottom plate promotes through compression bar system and opens, location core and cutting teeth all set up on the bottom plate, the storage cylinder includes drum and circular cone, the outer wall circumference of drum evenly is provided with many slag guide strips, the outer wall of circular cone is provided with helical blade.

Furthermore, the slag guide strips are obliquely arranged, and a soil guide groove is formed between every two adjacent slag guide strips.

Furthermore, the top of the slag guide strip is flush with the top of the cylinder, and the bottom of the slag guide strip is flush with the bottom of the cylinder.

Further, the connector is including setting up the square body at drum roof center and setting up the reinforcing plate in square body four corners, respectively seted up one on four faces of square body and link up circular mouth, link up circular mouth symmetrical arrangement on the opposite face.

Further, the compression bar system comprises a compression bar which vertically penetrates through the material storage barrel and can move up and down relative to the material storage barrel and a return spring which is sleeved at the top of the compression bar, and the bottom of the compression bar is connected with the non-hinged side of the bottom plate through a connecting member.

Furthermore, the connecting component comprises a movable hook body hinged with the material storage cylinder and a fixed hook body fixedly connected with the bottom plate, the downward movement of the pressure rod can push the movable hook body to rotate outwards around a hinged point of the movable hook body, and the fixed hook body is buckled with the movable hook body when the bottom plate is closed.

Further, the bottom plate includes the dabber, with dabber fixed connection's the upper plate body and with the dabber rotation lower floor's plate body be connected, upper plate body and lower floor's plate body all are provided with the breach, form into soil inlet when the breach of upper plate body and the breach coincidence of lower floor's plate body, and soil inlet closes when the breach of upper plate body and the breach of lower floor's plate body stagger.

Further, the storage cylinder is provided with an exhaust hole.

The utility model has the advantages that: the utility model discloses a be adapted to half crowded native drill bit of spiral of large aperture, including connector, storage barrel, bottom plate, location core, cutting tooth and depression bar system, the connector sets up at storage barrel top, the bottom plate sets up in storage barrel bottom portion, and bottom plate one side is articulated with the storage barrel, is provided with into soil mouthful on the bottom plate, and the bottom plate promotes through depression bar system and opens, location core and cutting tooth all set up on the bottom plate, the storage barrel includes drum and circular cone, the outer wall circumference of drum evenly is provided with many and leads the sediment strip, the outer wall of circular cone is provided with helical blade. Adopt the spiral of this application to be adapted to large aperture half crowded soil drill bit, crowd soil jointly through drum and circular cone, improved crowded soil effect greatly to ensure pile foundation quality, practiced thrift the cost simultaneously, still have green's advantage.

Drawings

The invention is further described with reference to the following figures and examples.

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention;

FIG. 2 is a schematic drive diagram of the compression bar system;

fig. 3 is a schematic structural diagram of the base plate.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1-3: the embodiment provides a half crowded native drill bit of spiral suitable for large aperture, including connector, storage cylinder, bottom plate 8, location core 6, cutting teeth 7 and compression bar system, storage cylinder is including welding drum 3 and circular cone 4 together, the even welding of outer wall circumference of drum 3 has many slag bars 9 of leading, the outer wall welding of circular cone 4 has helical blade 5, and for conveniently advancing soil in-process exhaust, is provided with the exhaust hole at the storage cylinder middle part. The connector comprises a square body 1 welded at the center of the cylindrical top plate and reinforcing plates 2 welded at four corners of the square body 1, and the reinforcing plates are welded with the cylindrical top plate simultaneously; four faces of the square body are respectively provided with a through circular opening, and the through circular openings on the opposite faces are symmetrically arranged. When the drill bit is installed, the cross pin penetrating through the circular opening is connected with a drill rod of the rotary drilling machine, the up-and-down sliding, the front-and-back sliding and the left-and-right sliding between the drill bit and the drill rod are limited in the assembling mode, and the connection stability of the drill bit and the drill rod is greatly improved.

The cylinder 3 is formed by winding and welding a Q235b steel plate with the thickness of 16-20mm, the diameter of the steel plate is 60mm larger than the designed pile diameter, the height of the steel plate is 500mm, and the top of the steel plate is welded with the Q235 steel plate with the thickness of 10-12 mm. The slag guide strips 9 are steel plates with the thickness of 16-20mm, the tops of the slag guide strips 9 are flush with the top of the soil extrusion retaining wall cylinder, and the bottoms of the slag guide strips 9 are flush with the bottom of the soil extrusion retaining wall cylinder.

The conical cylinder 4 is formed by winding and welding a steel plate of Q235b, the outer diameter of an upper opening is the same as that of a cylinder, and the outer diameter of a lower opening is 200-400mm smaller than that of the upper opening. The screw pitch of the helical blade 5 is 250-300mm, the outer diameter of the helical blade is the same as that of the cylinder, the inner diameter of the helical blade changes along with the outer diameter of the conical cylinder, and the helical blade is double helix and straight thread. Under the action of the torque of the rotation of the drilling machine, part of soil is slowly squeezed into the hole wall area by the conical cylinder and the spiral blades.

The bottom plate sets up in the storage cylinder bottom, and bottom plate 8 includes dabber 803, rotates the lower floor's plate body 802 of being connected with dabber 803 with dabber fixed connection's upper plate body 801 and, upper plate body 801 and lower floor's plate body 802 all are provided with the breach, form into soil inlet 14 when the breach of upper plate body and the breach coincidence of lower floor's plate body, and soil inlet 14 closes when the breach of upper plate body and the breach of lower floor's plate body stagger. When the drill bit is used for tunneling, the notches of the upper layer plate body and the lower layer plate body are overlapped so that the soil inlet is opened, when the drill bit is lifted to unload soil, the soil inlet is closed, and the drill bit is lifted out of the drill hole and then the bottom plate is opened to unload the soil. The rotation of the lower plate body can be driven by a drill rod of a drilling machine, which is the prior art and is not described in detail here.

One side of the bottom plate is hinged with one side of the conical barrel, and the other side of the bottom plate is pushed to open through a pressure lever system. The compression bar system comprises a compression bar 11 which vertically penetrates through the material storage barrel and can move up and down relative to the material storage barrel and a return spring 10 which is sleeved at the top of the compression bar, the bottom of the compression bar 11 is connected with the non-hinged side of the bottom plate through a connecting member, and the bottom of the return spring 10 is connected with the top plate of the cylinder 3. The connecting component comprises a movable hook body 12 hinged with the material storage barrel and a fixed hook body 13 fixedly connected with the bottom plate 8, the movable hook body can be pushed to rotate outwards around a hinged point of the movable hook body by downward movement of the pressure lever, and the fixed hook body is buckled with the movable hook body when the bottom plate is closed. When the bottom plate needs to be opened, the drill pushes the press rod to move downwards to push the movable hook body to rotate outwards, so that the movable hook body is separated from the fixed hook body, the bottom plate rotates downwards to be opened under the action of gravity, the drill stops applying thrust, the press rod resets upwards under the action of the reset spring and drives the movable hook body to reset, when the bottom plate needs to be closed, the drill rod drives the drill bit to move downwards to push the bottom plate to overturn upwards, and the bottom plate can be closed after the fixed hook body and the movable hook body are buckled.

The positioning core and the cutting teeth are arranged on the bottom plate, and the positioning core is positioned in the center of the bottom plate and is used for conveniently aligning to the center of the pile.

By adopting the drill bit of the embodiment, when construction drilling is carried out, the cylinder can reduce the transmission of soil bodies of the retarded conical cylinder from bottom to top, the sufficiency and the compactness of soil extrusion are greatly improved, and the soil extrusion effect is greatly improved and the quality of a pile foundation is ensured. Moreover, the slag guide strip can increase the extrusion force of extruding the soil body to the pile wall, and the soil extruding effect is further improved. Preferably, the slag guide strips are obliquely arranged, and a soil guide groove is formed between every two adjacent slag guide strips. In the rotation process of the drilling machine, the soil guide groove drives part of soil to be scattered and extruded to the side wall of the pile hole in a spiral shape, so that the soil extrusion uniformity of each area of the side wall of the pile hole is improved, and the soil extrusion effect and the pile foundation quality are further improved.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (8)

1. The utility model provides a be adapted to crowded native drill bit of spiral half of large aperture, includes connector, storage cylinder, bottom plate, location core, cutting teeth and depression bar system, the connector sets up at the storage cylinder top, the bottom plate sets up in the storage cylinder bottom, and bottom plate one side is articulated with the storage cylinder, is provided with into soil mouth on the bottom plate, and the bottom plate promotes through depression bar system and opens, location core and cutting teeth all set up on the bottom plate its characterized in that: the storage cylinder comprises a cylinder and a conical cylinder, a plurality of slag guide strips are uniformly arranged on the circumferential direction of the outer wall of the cylinder, and spiral blades are arranged on the outer wall of the conical cylinder.

2. The large aperture helical earth-displacement drill bit of claim 1, wherein: the slag guide strips are obliquely arranged, and a soil guide groove is formed between every two adjacent slag guide strips.

3. The large aperture helical earth-displacement drill bit of claim 2, wherein: the top of the slag guide strip is flush with the top of the cylinder, and the bottom of the slag guide strip is flush with the bottom of the cylinder.

4. The large aperture helical earth-displacement drill bit of claim 3, wherein: the connector is including setting up the square body at drum roof center and setting up the reinforcing plate in square body four corners, respectively seted up one on four faces of square body and link up circular mouth, link up circular mouth symmetrical arrangement on the opposite face.

5. The helical half-displacement drill bit adapted for large apertures according to any one of claims 1 to 4, wherein: the compression bar system comprises a compression bar which vertically penetrates through the material storage barrel and can move up and down relative to the material storage barrel and a return spring which is sleeved at the top of the compression bar, and the bottom of the compression bar is connected with the non-hinged side of the bottom plate through a connecting member.

6. The large aperture helical earth-displacement drill bit of claim 5, wherein: the connecting component comprises a movable hook body hinged with the material storage cylinder and a fixed hook body fixedly connected with the bottom plate, the movable hook body can be pushed to rotate outwards around a hinged point of the movable hook body by downward movement of the pressure lever, and the fixed hook body is buckled with the movable hook body when the bottom plate is closed.

7. The large aperture helical earth-displacement drill bit of claim 6, wherein: the bottom plate includes the dabber, rotates the lower floor's plate body of being connected with dabber fixed connection's upper strata plate body and with the dabber, upper strata plate body and lower floor's plate body all are provided with the breach, form into soil inlet when the breach of upper strata plate body and the breach coincidence of lower floor's plate body, and soil inlet closes when the breach of upper strata plate body and the breach of lower floor's plate body stagger.

8. The large aperture helical earth-displacement drill bit of claim 7, wherein: the storage cylinder is provided with an exhaust hole.

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