CN217400828U - Long auger head structure of pebble layer - Google Patents

Abstract

The utility model discloses a drill bit technical field's a pebble layer long twist drill bit structure, including the drill bit main part, the circumference outer wall of drill bit main part coils and is provided with helical blade, helical blade's blade surface edge equidistance distributes and is provided with the main part pick, the front end of drill bit main part is provided with the drill point pick, the rear end of drill bit main part is provided with flange, the utility model discloses thicken dual helical blade, adopt bullet head alloy pick, evenly distributed, drill point bore the inclination and set up rationally, pick intensity is high, and the effect is showing, has not only improved the efficiency of construction, has practiced thrift the time, has still guaranteed the construction quality of pebble layer bored concrete pile pore-forming, has reduced the loss degree of drill bit.

Description

Long auger head structure of pebble layer

Technical Field

The utility model relates to a drill bit technical field specifically is a pebble layer long twist drill bit structure.

Background

With the rapid development of national economy, modern city construction is changed day by day, and in the large construction hot tide, various geological condition conditions are always met, which requires that the selection of pile forming form and foundation treatment mode in construction meeting complex geological conditions is particularly critical, for example, sand and pebble have large particle size, and the geological condition project with thick pebble layer analyzes and compares the process in eleven aspects of construction difficulty, safety risk, equipment resource, work efficiency, hole collapse, hole shrinkage, slurry leakage, noise, slurry pollution, cost and existing equipment market ownership: long spiral drilling and impact drilling. The two methods are repeatedly compared, so that the percussion drill is slow in construction progress, high in cost, large in pollution to the surrounding environment and strong in adaptability to the stratum. The traditional long auger hole-forming construction speed is high, the pollution to the surrounding environment is small, but in the construction with poor geological conditions, a pebble layer with the thickness of about 5m and the particle size of 30-200mm needs to pass through, even a few flat boulders with the particle size of 200-400mm exist, and the hole forming is very difficult. It takes too long time, the drill bit is worn seriously, and even the hole can not be formed.

Based on this, the utility model designs a pebble layer long auger bit structure to solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a long auger head structure of oval layer to solve above-mentioned technical problem.

In order to realize the purpose, the utility model provides the following technical scheme: the utility model provides an cobble layer long auger bit structure, includes the drill bit main part, the circumference outer wall of drill bit main part coils and is provided with helical blade, helical blade's blade surface edge equidistance distributes and is provided with the main part pick, the front end of drill bit main part is provided with the drill point pick, the rear end of drill bit main part is provided with flange.

Preferably, the helical blade is a double helical blade.

Preferably, the main body cutting pick and the drill tip cutting pick are alloy cutting picks, and the heads of the main body cutting pick and the drill tip cutting pick are bullet head structures.

Preferably, the number of the drill tip cutting picks is five, the drill tip cutting picks are linearly distributed on the front end face of the drill bit main body side by side, the drill tip cutting picks positioned at the circle center of the front end face are perpendicular to the cylindrical top face, and the rest two on the left side and the right side are mutually staggered in the same rotation direction and are arranged at an angle of 30-40 degrees with the front end face.

Preferably, the body pick is disposed on the helical blade obliquely toward the precession leading end.

Preferably, a plurality of connecting holes are formed in the connecting flange in an annular array mode.

Preferably, a plurality of reinforcing ribs in circumferential arrays are arranged between the front end face of the connecting flange and the rear end of the outer wall of the drill bit main body.

Compared with the prior art, utility model's beneficial effect does:

the utility model discloses thicken double helical blade, adopt bullet head alloy pick, evenly distributed, drill point bore and dig the inclination and set up rationally, pick intensity is high, and the effect is showing, has not only improved the efficiency of construction, has practiced thrift the time, has still guaranteed the construction quality of pebble bed bored concrete pile pore-forming, has reduced the loss degree of drill bit.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive work.

FIG. 1 is a schematic view of the overall three-dimensional structure of the present invention;

FIG. 2 is a schematic view of the overall front view structure of the present invention;

fig. 3 is a schematic view of the overall overlooking structure of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-a body cutting pick, 2-a drill bit body, 3-a connecting flange, 4-a helical blade, 5-a drill tip cutting pick, 6-a reinforcing rib and 7-a connecting hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art without making creative efforts based on the embodiments in the utility model belong to the protection scope of the utility model.

Referring to fig. 1-3, the utility model provides a technical solution: a structure of a pebble layer long spiral drill bit comprises a drill bit main body 2 which is an integral cylindrical hollow cylinder;

the spiral blade 4 is coiled on the circumferential outer wall of the drill bit main body 2, the spiral blade 4 is a double-spiral blade, the spiral blade is thickened actually, the spiral blade 4 rises along with the main body to form 360-degree spiral surrounding, and the spiral blade 4 can crush part of flat boulders when drilling and is led out of the ground through the spiral blade of the drill rod;

the blade surface edges of the helical blades 4 are equidistantly distributed with main body cutting teeth 1, and the main body cutting teeth 1 are obliquely arranged on the helical blades 4 towards the precession front end; the front end of the drill bit body 2 is provided with five drill tip picks 5, the drill tip picks 5 are linearly distributed on the front end face of the drill bit body 2 side by side, the drill tip picks 5 positioned at the circle center of the front end face are vertical to the top surface of the cylinder, and the other two on the left side and the other two on the right side are mutually staggered in the same rotation direction and form an angle of 30-40 degrees with the front end face; the main body cutting pick 1 and the drill tip cutting pick 5 are both alloy cutting picks, the heads of the main body cutting pick 1 and the drill tip cutting pick 5 are in bullet head structures, common cutting picks are replaced by the bullet head alloy cutting picks, 360-degree spiral surrounding of a drill rod is formed along with the trend of blades, the cutting force of a drill bit on a pebble layer is increased, and meanwhile the abrasion degree of the drill bit is reduced;

the rear end of drill bit main part 2 is provided with flange 3 for connect long auger drilling machine drilling rod, a plurality of connecting holes 7 have been seted up to the annular array on flange 3, be used for bolted connection long auger drilling machine drilling rod, be provided with the strengthening rib 6 of a plurality of annular arrays between flange 3's the preceding terminal surface and the outer wall rear end of drill bit main part 2, be used for the reinforcing flange to be connected with the main part, and improve the moment of torsion, connecting hole 7 and strengthening rib 6 are 6, are the alternate distribution.

Working principle embodiment:

after the connecting flange is connected to a drill rod of a long spiral drilling machine, the machine is tested, the drilling machine is moved to be in place, guide rods of a tower body are checked on a measured flat ground by using vertical marker posts on the front, the back, the left and the right of the tower body of the tower crane, the position is corrected, the drill rod is vertically aligned to the center of a pile position, the centering error is ensured to be not more than 1cm, a drill bit is aligned to a pile point, the correcting machine body is horizontal, and the drill rod is vertical to the ground through a buoy on a large arm of a pile machine. The verticality tolerance is 1%. The improved drill bit penetrates through a pebble bed to be led into a hole, and when drilling, the drill bit can crush part of flat boulders and lead the flat boulders out of the ground through a spiral drill rod. After the hole leading of the double-helix thick-blade bullet alloy cutting bit is finished, a common spiral bit with a movable valve is replaced to clean the hole, the designed pile bottom is reached, the drilling is stopped, concrete is pumped, pipe drawing is started after the drill rod core is filled with the concrete, the pumping quantity of the concrete is matched with the pipe drawing speed, the pipe drawing speed is controlled to be about 1.5-1.7m/min, and a steel bar cage is pressed after grouting is finished, so that construction common faults such as pile breakage, hole shrinkage, hole collapse and the like are prevented.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present application, unless otherwise explicitly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be understood broadly, and may be, for example, fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the term "connected" may refer to a direct connection, an indirect connection through an intermediate, a connection between two elements or an interaction relationship between two elements, and unless otherwise specifically defined, the term should be understood as having a specific meaning in the present application by those skilled in the art.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. An oval layer long auger head structure which characterized in that: the drill bit comprises a drill bit main body (2), wherein spiral blades (4) are wound on the outer circumferential wall of the drill bit main body (2), main body cutting teeth (1) are distributed on the edge of the blade surface of each spiral blade (4) at equal intervals, a cutting tooth (5) with a drill tip is arranged at the front end of the drill bit main body (2), and a connecting flange (3) is arranged at the rear end of the drill bit main body (2); the drill bit body (2) is characterized in that the number of the drill bit picks (5) is five, the drill bit picks (5) are linearly distributed side by side on the front end face of the drill bit body (2), the drill bit picks (5) located at the circle center of the front end face are perpendicular to the top surface of the cylinder, and the rest two bits on the left side and the right side are staggered in the same rotary direction and are arranged at an angle of 30-40 degrees with the front end face.

2. The pebble long auger head structure of claim 1, wherein: the helical blade (4) is a double helical blade.

3. The pebble long auger head structure of claim 1, wherein: the cutting pick is characterized in that the main body cutting pick (1) and the drill tip cutting pick (5) are alloy cutting picks, and the heads of the main body cutting pick (1) and the drill tip cutting pick (5) are bullet head structures.

4. The pebble long auger head structure of claim 1, wherein: the body cutting pick (1) is arranged on the helical blade (4) in an inclined manner towards the screwing-in front end.

5. The pebble long auger head structure of claim 1, wherein: a plurality of connecting holes (7) are formed in the connecting flange (3) in an annular array mode.

6. The pebble long auger head structure of claim 1, wherein: a plurality of reinforcing ribs (6) in annular array are arranged between the front end face of the connecting flange (3) and the rear end of the outer wall of the drill bit main body (2).

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