CN218030075U

CN218030075U - Drill bit device for secondary hole sweeping of steel sheet pile

Info

Publication number: CN218030075U
Application number: CN202222957689.XU
Authority: CN
Inventors: 王志文; 詹超; 杨洋; 宋江俊; 姚伟
Original assignee: Anhui Lutan Construction Group Co ltd
Current assignee: Anhui Lutan Construction Group Co ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2022-12-13
Anticipated expiration: 2032-11-08

Abstract

The utility model discloses a drill bit device that is used for steel sheet pile secondary to sweep hole belongs to steel sheet pile construction technical field, including drive shaft, first drilling rod and second drilling rod, the drive shaft with draw hole machine fixed connection and by draw the hole machine and drive the drive shaft rotates, the bottom of drive shaft is with the help of fixed subassembly fixedly connected with first drilling rod or second drilling rod. The utility model discloses make first drilling rod or second drilling rod and drive shaft high-speed joint with the help of inserted bar and jack to utilize first ring flange and second ring flange and the first drilling rod of bolt fastening or second drilling rod and drive shaft, avoid becoming flexible between first drilling rod or second drilling rod and the drive shaft, reduce because of not hard up between first drilling rod or second drilling rod and the drive shaft and cause the possibility of drawing the hole slope.

Description

Drill bit device for secondary hole sweeping of steel sheet pile

Technical Field

The utility model belongs to the technical field of the steel sheet pile construction, concretely relates to a drill bit device that is used for steel sheet pile secondary to sweep hole.

Background

In the deep foundation pit engineering construction, the steel sheet pile enclosure is widely applied due to the characteristics of good quality, high construction efficiency, high cost performance and the like. However, under the complex geological conditions of a mud rock layer, a pebble layer and a compact gravel layer, steel sheet piles are difficult to insert and beat, and cannot be beaten smoothly.

Can adopt among the prior art to draw hole + secondary and sweep hole construction technology in advance, use the minor diameter drill bit to draw the hole in advance earlier, use major diameter drill bit to closely paste a steel sheet pile and carry out the secondary and sweep the hole again, it beats to establish to carry out the steel sheet pile after sweeping the hole again, a series of problems that the drill bit produced forward hole skew when effectively having avoided drawing the hole, construction cost has been practiced thrift, must can involve the change of drill bit at this in-process, the drill bit is generally fixed through the mode of screw thread, but in case screw thread department takes place to become flexible, lead to the drilling rod skew very easily, and then make the draw the hole skew, can not reach the effect that the steel sheet pile led to the hole.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a drill bit device for hole is swept to steel sheet pile secondary to can adopt among the solution prior art to draw hole + secondary in advance and can involve the change of drill bit when sweeping hole construction technology, the drill bit is generally fixed through the mode of screw thread, but in case screw thread department takes place not hard up, leads to the drilling rod skew very easily, and then makes and draw the hole skew, does not reach the problem of the effect that the hole was drawn to the steel sheet pile.

A drill bit device for secondary hole sweeping of a steel sheet pile comprises a driving shaft, a first drill rod and a second drill rod, wherein the driving shaft is fixedly connected with a hole guiding machine and is driven by the hole guiding machine to rotate, and the first drill rod or the second drill rod is fixedly connected to the bottom of the driving shaft through a fixing assembly.

Preferably, fixed subassembly includes inserted bar, jack, spacing groove and spacing portion, the inside of drive shaft is opened along its axial has the jack just the inside of jack is equipped with the annular clamping part of circle, the inner wall symmetry of clamping part is opened there is the spacing groove, the top of first drilling rod and second drilling rod all be equipped with the inserted bar that the jack corresponds, the surface symmetry of inserted bar be equipped with the spacing portion that the spacing groove corresponds, the inserted bar inserts just in the jack moves along the spacing groove the clamping part with between the jack diapire, rotate the inserted bar makes spacing portion with the spacing groove dislocation.

Preferably, the inner diameter of the buckling part is equal to the outer diameter of the inserted rod, the inner wall of the insertion hole is wrapped with a non-slip mat, and a gap with the same width as the limiting part is reserved between the bottom wall of the insertion hole and the buckling part.

Preferably, the top of the first drill rod and the top of the second drill rod are fixedly connected with a second flange, a plurality of fixing holes are formed in the surface of the second flange along the circumferential direction of the second flange, a first flange is arranged at the end of the driving shaft, communication holes corresponding to the fixing holes in a one-to-one mode are formed in the surface of the first flange, two ends of a bolt penetrate through the fixing holes and the communication holes respectively, and locking nuts are meshed with the two ends of the bolt through threads.

Preferably, the surfaces of the first drill rod and the second drill rod are provided with helical blades along the height direction of the surfaces, the width of the helical blade on the first drill rod is 0.8m, and the width of the helical blade on the second drill rod is 1.2m.

The utility model discloses a have following advantage:

the utility model discloses when first drilling rod of installation or second drilling rod, at first make the inserted bar can aim at the jack of drive shaft, make the inserted bar can remove along the jack, the inserted bar setting isometric with the jack, the inserted bar inserts in the jack just spacing portion moves along the spacing groove buckle portion with back between the jack diapire, rotate the inserted bar makes spacing portion with spacing groove dislocation, spacing portion direct motion arrives in the clearance like this, then rotate the inserted bar and can make spacing portion and spacing groove take place the dislocation, utilize buckle portion to block the outside removal of inserted bar, can high-speed joint drive shaft and first drilling rod or second drilling rod, the inserted bar inserts in the jack completely after, the second ring flange of first drilling rod and second drilling rod tip can paste with the first ring flange of drive shaft tip mutually, through bolt and lock nut fixed connection between the two at last, strengthen the connectivity between first drilling rod or second drilling rod and the drive shaft like this, avoid becoming flexible between first drilling rod or the second drilling rod and the drive shaft, reduce because of first drilling rod or second drilling rod and the drive shaft between the possibility that causes the inclined hole to become flexible.

Drawings

Fig. 1 is a schematic structural view of a first drill rod of the present invention;

fig. 2 is a schematic view of the internal structure of the driving shaft of the present invention;

FIG. 3 is a schematic structural view of a second drill rod according to the present invention;

wherein: 1. a drive shaft; 10. a first drill rod; 11. a second drill pipe; 12. a first flange plate; 13. a second flange plate; 14. a bolt; 15. locking the nut; 16. a fixing hole; 17. communicating hole

2. A fixing assembly; 20. a rod is inserted; 21. a jack; 22. a fastening part; 23. a limiting groove; 24. a limiting part; 25. a non-slip mat.

Detailed Description

The following detailed description of the present invention is provided to enable those skilled in the art to make and use the present invention without departing from the spirit and scope of the present invention.

The drill bit device for secondary hole sweeping of the steel sheet pile as shown in fig. 1-3 comprises a driving shaft 1, a first drill rod 10 and a second drill rod 11, wherein the driving shaft 1 is fixedly connected with a hole guide machine and the driving shaft 1 is driven by the hole guide machine to rotate, and the bottom of the driving shaft 1 is fixedly connected with the first drill rod 10 or the second drill rod 11 by means of a fixing assembly 2.

The fixing component 2 comprises an inserting rod 20, an inserting hole 21, a limiting groove 23 and a limiting portion 24, the inserting hole 21 is formed in the driving shaft 1 along the axial direction of the driving shaft, the annular buckling portion 22 is arranged inside the inserting hole 21, the limiting groove 23 is symmetrically formed in the inner wall of the buckling portion 22, the inserting rod 20 corresponding to the inserting hole 21 is arranged at the top of each of the first drill rod 10 and the second drill rod 11, the limiting portion 24 corresponding to the limiting groove 23 is symmetrically arranged on the surface of the inserting rod 20, the inserting rod 20 is inserted into the inserting hole 21, the limiting portion 24 moves to the buckling portion 22 along the limiting groove 23, the bottom wall of the inserting hole 21 is located between the limiting groove 23, and the limiting portion 24 is staggered with the limiting groove 23 due to the fact that the inserting rod 20 is rotated. The inner diameter of buckling part 22 with inserted bar 20's external diameter equals, the inner wall parcel of jack 21 has slipmat 25, the diapire of jack 21 with leave between buckling part 22 with spacing portion 24 isopachous clearance.

When the first drill rod 10 or the second drill rod 11 is installed, firstly, the insert rod 20 is enabled to be aligned to the insertion hole 21 of the drive shaft 1, the insert rod 20 is enabled to move along the insertion hole 21, the length of the insert rod 20 is equal to that of the insertion hole 21, the insert rod 20 is prevented from being exposed to an external environment excessively, because the diameter of the insert rod 20 is smaller than the length of the drive shaft 1, the insert rod 20 is used for connecting the drive shaft 1 and the first drill rod 10 or the second drill rod 11, the insert rod 20 is prevented from being broken, the insert rod 20 is completely inserted into the insertion hole 21, the insert rod 20 is inserted into the insertion hole 21, the limiting portion 24 moves between the buckling portion 22 and the bottom wall of the insertion hole 21 along the limiting groove 23, then, the insert rod 20 is rotated to enable the limiting portion 24 to be dislocated with the limiting groove 23, the limiting portion 24 directly moves into a gap, then the insert rod 20 is rotated to block the insert rod 20 from moving outwards, the drive shaft 1 and the first drill rod 10 or the second drill rod 11 can be quickly connected, the insert rod 21 and the insert rod 20 and the insertion hole 21 can be prevented from being filled with the anti-slip mat 25, and the insert rod 20.

The top parts of the first drill rod 10 and the second drill rod 11 are fixedly connected with a second flange 13, a plurality of fixing holes 16 are formed in the surface of the second flange 13 along the circumferential direction of the second flange, a first flange 12 is arranged at the end part of the driving shaft 1, communication holes 17 corresponding to the fixing holes 16 one by one are formed in the surface of the first flange 12, two ends of a bolt 14 respectively penetrate through the fixing holes 16 and the communication holes 17, and locking nuts 15 are meshed at two ends of the bolt 14 through threads.

After the first drill rod 10 or the second drill rod 11 is connected with the driving shaft 1, because the length of the insert rod 20 is equal to that of the insertion hole 21, after the insert rod 20 is completely inserted into the insertion hole 21, the second flange 13 at the end parts of the first drill rod 10 and the second drill rod 11 can be attached to the first flange 12 at the end part of the driving shaft 1, at this time, the first drill rod 10 and the second drill rod 11 are already connected with the driving shaft 1 and cannot rotate freely, when the two ends of the bolt 14 respectively penetrate through the fixing hole 16 and the communicating hole 17 and are rotatably engaged with the locking nut 15, the installation process can be accelerated, the bolt 14 can be aligned with the fixing hole 16 and the communicating hole 17 without finding a hole, so that the connectivity between the first drill rod 10 or the second drill rod 11 and the driving shaft 1 is enhanced, the looseness between the first drill rod 10 or the second drill rod 11 and the driving shaft 1 is avoided, and the possibility of leading the hole inclination caused by the looseness between the first drill rod 10 or the second drill rod 11 and the driving shaft 1 is reduced.

The surfaces of the first drill rod 10 and the second drill rod 11 are respectively provided with a helical blade along the height direction, the width of the helical blade on the first drill rod 10 is 0.8m, and the width of the helical blade on the second drill rod 11 is 1.2m.

During formal construction, the stress form of a drill bit is changed through a pre-hole forming process and a secondary hole sweeping process, during the pre-hole forming stage, the drill bit with the width of 0.8m is used for pre-hole forming until the elevation of the bottom of a designed steel plate pile is reached, at the moment, the drill bit is subjected to mutually balanced soil pressure in all directions around the hole, during the secondary hole sweeping stage, the drill bit with the width of 1.2m is used for sweeping the hole, so that the soil wall with the original pilot hole diameter of 0.8m is separated under the action of the drilling downward pressure of the spiral drill, the hole is expanded to the diameter of 1.2m, and the pilot hole is effectively prevented from inclining.

The working principle is as follows: when the first drill rod 10 or the second drill rod 11 is installed, firstly, the insert rod 20 can be aligned with the insertion hole 21 of the drive shaft 1, so that the insert rod 20 can move along the insertion hole 21, the length of the insert rod 20 is equal to that of the insertion hole 21, the insert rod 20 is prevented from being exposed to an external environment excessively, because the diameter of the insert rod 20 is smaller than that of the drive shaft 1, the insert rod 20 is used for connecting the drive shaft 1 and the first drill rod 10 or the second drill rod 11, the insert rod 20 is prevented from being broken, the insert rod 20 is required to be inserted into the insertion hole 21 completely, the insert rod 20 is inserted into the insertion hole 21, the limit part 24 moves between the buckling part 22 and the bottom wall of the insertion hole 21 along the limit groove 23, then, the insert rod 20 is rotated to enable the limit part 24 and the limit groove 23 to be dislocated, so that the limit part 24 directly moves into a gap, and then the insert rod 20 is rotated to enable the limit part 24 and the limit groove 23 to be dislocated, the clamping part 22 is used for blocking the outward movement of the insert rod 20, the drive shaft 1 and the first drill rod 10 or the second drill rod 11 can be quickly connected, the anti-slip pad 25 is further arranged inside the insertion hole 21, the anti-slip pad 25 is used for filling the space between the insert rod 20 and the insertion hole 21, on one hand, the insert rod 20 is protected, on the other hand, the insert rod 20 can be prevented from freely rotating, after the first drill rod 10 or the second drill rod 11 is connected with the drive shaft 1, because the length of the insert rod 20 is equal to that of the insertion hole 21, after the insert rod 20 is completely inserted into the insertion hole 21, the second flange 13 at the end part of the first drill rod 10 and the second drill rod 11 can be attached to the first flange 12 at the end part of the drive shaft 1, finally, the two ends of the bolt 14 respectively penetrate through the fixing hole 16 and the communication hole 17, and the two ends of the bolt 14 rotatably engage the locking nut 15, so that the connectivity between the first drill rod 10 or the second drill rod 11 and the drive shaft 1 is enhanced, the looseness between the first drill rod 10 or the second drill rod 11 and the driving shaft 1 is avoided, and the possibility of leading hole inclination caused by the looseness between the first drill rod 10 or the second drill rod 11 and the driving shaft 1 is reduced.

The above description is made for the exemplary purposes with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and various insubstantial improvements can be made without modification to the present invention.

Claims

1. The utility model provides a drill bit device that is used for steel sheet pile secondary to sweep hole which characterized in that: comprising a drive shaft (1), a first drill rod (10) and a second drill rod (11), the driving shaft (1) is fixedly connected with the hole guiding machine and the hole guiding machine drives the driving shaft (1) to rotate, the bottom of the drive shaft (1) is fixedly connected with the first drill rod (10) or the second drill rod (11) by means of a fixing component (2), the fixing component (2) comprises an inserting rod (20), an inserting hole (21), a limiting groove (23) and a limiting part (24), an insertion hole (21) is formed in the driving shaft (1) along the axial direction of the driving shaft, an annular buckling part (22) is arranged in the insertion hole (21), the inner wall of the buckling part (22) is symmetrically provided with the limiting grooves (23), the tops of the first drill rod (10) and the second drill rod (11) are respectively provided with an insert rod (20) corresponding to the insert hole (21), the surface of the inserted bar (20) is symmetrically provided with a limit part (24) corresponding to the limit groove (23), the inserted bar (20) is inserted into the insertion hole (21), the limiting part (24) moves to a position between the buckling part (22) and the bottom wall of the insertion hole (21) along a limiting groove (23), and the inserted bar (20) is rotated to enable the limiting part (24) and the limiting groove (23) to be staggered.

2. The drill bit device for the secondary hole sweeping of the steel sheet pile according to claim 1, is characterized in that: the inner diameter of the buckling part (22) is equal to the outer diameter of the inserted rod (20), the inner wall of the insertion hole (21) is wrapped with a non-slip pad (25), and a gap with the same width as the limiting part (24) is reserved between the bottom wall of the insertion hole (21) and the buckling part (22).

3. The drill bit device for the secondary hole sweeping of the steel sheet pile according to claim 2, is characterized in that: the top of first drilling rod (10) and second drilling rod (11) all fixedly connected with second ring flange (13), open along its circumferencial direction on the surface of second ring flange (13) has a plurality of fixed orificess (16), the tip of drive shaft (1) is equipped with first ring flange (12), open on the surface of first ring flange (12) have with the intercommunicating pore (17) of fixed orificess (16) one-to-one, the both ends of bolt (14) pass respectively fixed orifices (16) and intercommunicating pore (17) just the both ends of bolt (14) have lock nut (15) through threaded engagement.

4. The drill bit device for the secondary hole sweeping of the steel sheet pile as claimed in claim 3, wherein: the surface of the first drill rod (10) and the surface of the second drill rod (11) are both provided with helical blades along the height direction of the first drill rod and the second drill rod, the width of the helical blades on the first drill rod (10) is 0.8m, and the width of the helical blades on the second drill rod (11) is 1.2m.