CN215169752U

CN215169752U - Drill bit for composite rotary digging bottom expanding screw thread filling pile

Info

Publication number: CN215169752U
Application number: CN202121590159.5U
Authority: CN
Inventors: 周广泉; 沈缤; 王猛; 王兆军
Original assignee: Shandong Dingxin Geotechnical Technology Co ltd
Current assignee: Shandong Dingxin Geotechnical Technology Co ltd
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2021-12-14
Anticipated expiration: 2031-07-14

Abstract

In order to solve the problem of low construction efficiency of the expanded-base threaded pile, the utility model provides a composite rotary-digging expanded-base threaded cast-in-place pile drill bit, which mainly comprises a connecting block, an upper clamp plate, a lower clamp plate, an L-shaped expanded-base cutter arm hinged between the upper clamp plate and the lower clamp plate, a threaded cutter holder and a rotary table, wherein the connecting block is fixedly connected above the upper clamp plate, a guide structure for up-and-down sliding connection and torque transmission between the upper clamp plate and the lower clamp plate is arranged between the upper clamp plate and the lower clamp plate, the threaded cutter holder is vertically and slidably connected below the lower clamp plate, the threaded cutter is positioned between the lower clamp plate and the threaded cutter holder, one end of the threaded cutter is hinged with the threaded cutter holder, the upper clamp plate drives the lower clamp plate to press down and simultaneously drive the L-shaped expanded-base cutter arm and the threaded cutter to expand outwards, the rotary table is fixedly connected below the threaded cutter holder, the bottom expanding and spiral groove cutting operation can be completed at one time, the construction efficiency is effectively improved, and the construction cost is reduced.

Description

Drill bit for composite rotary digging bottom expanding screw thread filling pile

Technical Field

The utility model relates to a construction technical field, in particular to compound end screw thread bored concrete pile drill bit that expands soon. Background

At present, a bottom expanding drill bit and a thread drill bit used in the construction of a rotary-digging bottom expanding thread cast-in-place pile in the market are separated, namely, the bottom expanding drill bit is replaced to implement bottom expanding and bottom cleaning operation, and then the thread drill bit is replaced to carry out rotary-cutting thread grooves, and the process has the following defects: when the rotary digging bottom expanding and the rotary cutting thread groove are implemented, two sets of special drill bits need to be replaced, the time consumption is long, the work efficiency is low, the cost is high, and the working procedures are complicated.

Disclosure of Invention

In order to solve the problem, the utility model provides a compound end screw thread bored concrete pile drill bit of digging soon, the technical scheme of adoption as follows:

the utility model provides a compound is dug soon and is expanded end screw thread bored concrete pile drill bit, its characterized in that mainly includes connecting block, punch holder, lower plate, articulates L type between punch holder and lower plate and expands end sword arm, thread sword, thread tool rest and carousel, connecting block fixed connection is in the punch holder top, be provided with between punch holder and the lower plate and be used for sliding connection and the guide structure of transmission moment of torsion about between the two, sliding connection is in the lower plate below about the thread tool rest, the thread sword is located between lower plate and the thread tool rest, and thread sword one end is articulated with the thread tool rest, and the punch holder drives the lower plate and pushes down and drive L type simultaneously and expand end sword arm and thread sword outwards, carousel fixed connection is in thread tool rest below.

Preferably, the equal fixedly connected with rectangular pipe in punch holder below and lower plate top, slip the link to each other from top to bottom through the rectangular pipe between punch holder and the lower plate.

Preferably, the upper clamping plate, the lower clamping plate and the threaded tool rest are all hollow frame structures with hollow interiors and openings at the periphery.

Preferably, the turntable is coaxially and rotatably connected below the threaded tool rest through a fixed shaft.

The beneficial effects of the utility model reside in that:

1. after the L-shaped bottom expanding cutter arm completes the bottom expanding process, the thread blade cuts the spiral groove of the hole wall by means of the combined action of rotation and lifting of the drill rod;

2. the end bearing force and the friction force of the foundation pile can be greatly improved through the bottom expanding and the rotary cutting thread groove;

3. when the drill bit was in the lower manhole, L type enlarged base sword arm and screw blade all shrink to the drill bit inside, after reacing the hole bottom, pushed down through the drilling rod and can make L type enlarged base sword arm and screw blade stretch out to the outside, and the rotatory limit pull-up on the drilling rod edge can once accomplish and expand end and helicla flute cutting operation in addition, effectively improves the efficiency of construction, reduces construction cost.

Drawings

FIG. 1 is a schematic view of the structure of the present invention

The device comprises a connecting block 1, a 2-L-shaped upper bottom expanding cutter arm, a 3-L-shaped lower bottom expanding cutter arm, an upper clamping plate 4, a lower clamping plate 5, a 6-threaded cutter holder, a 7-sliding chute, an 8-pin shaft, a 9-threaded cutter blade, a 10-rotating disc and an 11-fixed shaft.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element so 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.

The drill bit for the composite rotary-excavating bottom-expanding threaded cast-in-place pile comprises a connecting block 1, an upper clamp plate 4, a lower clamp plate 5, an L-shaped upper bottom-expanding cutter arm 2, an L-shaped lower bottom-expanding cutter arm 3, a threaded cutter holder 6, a threaded blade and a rotary table 10, wherein the upper clamp plate 4 is fixedly connected below the connecting block 1, an outer pipe which is distributed downwards in the vertical direction is fixedly connected below the upper clamp plate 4, an inner pipe which is distributed upwards in the vertical direction is fixedly connected above the lower clamp plate 5, the cross sections of the outer pipe and the inner pipe are rectangular, the outer pipe is connected to the outer side of the inner pipe in a vertical sliding mode, the upper clamp plate 4 and the lower clamp plate 5 are connected in a vertical sliding mode through the inner pipe and the outer pipe, the outer pipe and the inner pipe cannot rotate relatively, torque is transmitted through the inner pipe and the outer pipe, the two L-shaped upper bottom-expanding cutter arms 2 are symmetrically distributed along the central line of the upper clamp plate 4, the upper ends of the two L-shaped upper bottom-expanding cutter arms 2 are hinged and connected inside the upper clamp plate 4, the lower clamp plate 5 is integrally of a frame structure and mainly comprises a front side plate and a rear side plate, the middle parts of the upper ends of the two side plates are fixedly connected with a connecting plate, the lower ends of two L-shaped lower expanding bottom cutter arms 3 are hinged between the front side plate and the rear side plate of the lower clamp plate 5, the upper ends of the two L-shaped lower expanding bottom cutter arms 3 are respectively hinged with the lower ends of two L-shaped upper expanding bottom cutter arms 2, a threaded cutter frame 6 is vertically and slidably connected below the lower clamp plate 5, a convex block is arranged above the threaded cutter frame 6 and vertically and slidably connected between the front side plate and the rear side plate of the lower clamp plate 5, the front side plate and the rear side plate of the lower clamp plate 5 are provided with sliding grooves 7 which are vertically distributed and penetrate in the front and rear direction, the front side surface and the rear side surface of the upper part of the convex block are provided with pin shafts 8, the threaded cutter frame 6 is vertically and slidably connected with the lower clamp plate 5 through the pin shafts 8 and the sliding grooves 7, the left side and the right side of the threaded cutter frame 6 are symmetrically provided with two threaded blades 9, the whole screw thread blade 9 that is located between lower plate 5 and the screw

thread knife rest

6, 9 one ends of screw thread blade are articulated with screw thread knife rest 6, the other end distributes to the outside, when lower plate 5 moves down to the below position, screw thread blade 9 is the horizontality and distributes, and certain length is stretched out to its outer end, carousel 10 passes through fixed axle 11 fixed connection in screw thread knife rest 6 below, the 11 upper ends of fixed axle weld in screw thread knife rest 6 below, can dismantle between 11 lower extremes of fixed axle and the carousel 10 and be connected, thereby convenient maintenance and change.

The construction operation of the bottom-expanding threaded pile by utilizing the device is as follows: firstly, drilling a hole to a depth required by design through a rotary drilling rig, replacing a composite drill bit of the device after a rotary drilling bucket is lifted out, applying vertical pressure to the drill bit through a rotary drilling rod after the drill bit is lowered to the bottom of the hole, enabling an L-shaped bottom expanding cutter arm and a thread blade 9 to expand outwards, driving the rotary drilling rod to rotate, completing a bottom expanding process through the L-shaped bottom expanding cutter arm, lifting the rotary drilling rod upwards, enabling the L-shaped bottom expanding cutter arm to contract, lifting the drill rod upwards while rotating, cutting a continuous spiral groove on the hole wall by the thread blade 9, finally installing a reinforcement cage after cleaning the bottom of the pile hole and changing slurry, pouring concrete to form a pile, and keeping the thread blade 9 in an expansion state all the time due to the resistance of an upper soil layer when the drill bit is lifted upwards, thereby completing the cutting of the spiral groove from bottom to top.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements can be made, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a compound is dug soon and is expanded end screw thread bored concrete pile drill bit, its characterized in that mainly includes connecting block, punch holder, lower plate, articulates L type between punch holder and lower plate and expands end sword arm, thread sword, thread tool rest and carousel, connecting block fixed connection is in the punch holder top, be provided with between punch holder and the lower plate and be used for sliding connection and the guide structure of transmission moment of torsion about between the two, sliding connection is in the lower plate below about the thread tool rest, the thread sword is located between lower plate and the thread tool rest, and thread sword one end is articulated with the thread tool rest, and the punch holder drives the lower plate and pushes down and drive L type simultaneously and expand end sword arm and thread sword outwards, carousel fixed connection is in thread tool rest below.

2. The drill bit for the composite rotary excavating bottom expanding threaded cast-in-place pile according to claim 1, wherein rectangular pipes are fixedly connected below the upper clamping plate and above the lower clamping plate, and the upper clamping plate and the lower clamping plate are connected through the rectangular pipes in a vertical sliding mode.

3. The drill bit for the composite rotary excavating bottom expanding threaded cast-in-place pile according to claim 1, wherein the upper clamping plate, the lower clamping plate and the threaded tool rest are all hollow frame structures with hollow interiors and openings at the periphery.

4. The drill bit for the composite rotary excavating bottom expanding threaded cast-in-place pile according to claim 1, wherein the rotary table is coaxially and rotatably connected below the threaded tool rest through a fixed shaft.