CN212716449U

CN212716449U - Auxiliary type double-cylinder drill bit

Info

Publication number: CN212716449U
Application number: CN202021147286.3U
Authority: CN
Inventors: 王怀营
Original assignee: Jiangmen Baorui Mechanical Engineering Co ltd
Current assignee: Jiangmen Baorui Mechanical Engineering Co ltd
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-03-16
Anticipated expiration: 2030-06-19

Abstract

The utility model discloses an auxiliary type binocular drill bit, the rotary drill comprises an upper cover plate, the outside welding of upper cover plate has main drill bit, the triangle reinforcing plate of fixedly connected with in position between upper cover plate and the main drill bit, the welding of the center bottom of upper cover plate has the inner tube mobile jib, the fixed welding of inner tube mobile jib lower extreme has auxiliary drill bit, the relief hole has been seted up to inner tube mobile jib stack shell. The utility model discloses can carry out pore-forming once to great stake footpath, save construction cost for the efficiency of construction to accelerate the process of construction, the utility model discloses a rightting effect can avoid the appearance of inclined hole, inclined hole scheduling problem, in case the inclined hole appears, inclined hole scheduling problem, needs to restore, and the repair work in later stage has greatly dragged the construction process slowly, thereby leads to construction cost to improve.

Description

Auxiliary type double-cylinder drill bit

Technical Field

The utility model relates to a dig drilling tool technical field soon specifically is an auxiliary type binocular drill bit.

Background

The rotary drilling rig is a common device for drilling bored concrete piles, and is applicable to most soil layer pile foundations and various hole piles. However, in order to enable the rotary drilling rig to construct most soil layer pile foundations and various hole piles, a special rotary drilling rig needs to be designed and researched according to various situations.

In the process of drilling construction of a drilled pile, the diameter of the pile inevitably has large and small diameters, and generally, when the diameter of the pile is smaller, a drilling tool with the corresponding diameter is used for one-time hole forming, so if the diameter of the pile is larger, one-time hole forming cannot be carried out again, because the drilling tool is larger along with the increase of the diameter of the pile, the drilling tool bears very large resistance when the drilling tool wants to form the hole once again, and even if the drilling tool can bear the resistance to form the hole, the middle rock core cannot be broken and taken out because the drill tool is directly larger, so the currently common construction mode is that the drilling tool with the smaller diameter is used for coring, and then the drilling tool with the larger diameter is used for hole forming. The mode can meet the construction requirements, but the problem is that drilling tools with different diameters need to be continuously replaced, and the construction efficiency is directly influenced.

When facing to some soft or hard inequalities or the stratum that has the solution cavity layer, the drilled pile appears the inclined hole easily in drilling the work progress, the problem of inclined hole, inclined hole partially, and the mode that now commonly uses is exactly to use full sleeve pipe, but the price of full sleeve pipe is more expensive, can directly increase the cost of construction.

The utility model discloses to present great stake footpath pore-forming construction difficulty and the inclined hole appears in the construction, the problem in inclined hole, the utility model discloses can carry out disposable pore-forming to great stake footpath to can also play the effect of rightting in the pore-forming work progress.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an auxiliary type binocular drill to solve to great stake footpath hole construction difficulty and the problem that appears inclined hole, inclined hole in the construction.

In order to achieve the above object, the utility model provides a following technical scheme: in order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an auxiliary type binocular drill bit, includes the upper cover plate, the outside welding of upper cover plate has main drill bit, the triangle reinforcing plate of fixedly connected with in position between upper cover plate and the main drill bit, the welding of the central bottom of upper cover plate has the inner tube mobile jib, inner tube mobile jib lower extreme fixed welding has auxiliary drill bit, the relief hole has been seted up to inner tube mobile jib stack shell, the relief hole inclined hole direction with dig the direction the same soon, the row of being convenient for expects.

Preferably, the cross-sectional diameter of the main bit is larger than the cross-sectional diameter of the auxiliary bit.

Preferably, the inner cylinder main rod and the main drill bit and the auxiliary drill bit are vertically and concentrically welded.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the utility model discloses can avoid changing the drilling tool many times, save construction cost for the efficiency of construction, thereby accelerate the process of construction, the utility model discloses a rightting effect can avoid the appearance of inclined hole, inclined hole scheduling problem, in case inclined hole, inclined hole scheduling problem appear, need restore, the repair work in later stage, very big dragging the construction process slowly to lead to construction cost to improve.

Drawings

Fig. 1 is a structural sectional view of embodiment 1 of the present invention.

In the figure: 1 upper cover plate, 2 main drill bits, 3 triangular reinforcing plates, 4 inner cylinder main rods, 5 auxiliary drill bits and 6 discharge holes.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Embodiment 1, see fig. 1, an auxiliary type double-cylinder drill bit, including upper cover plate 1, main drill bit 2 has been welded in the outside of upper cover plate 1, the position fixedly connected with triangle reinforcing plate 3 between upper cover plate 1 and the main drill bit 2, inner tube mobile jib 4 has been welded to the central bottom of upper cover plate 1, auxiliary drill bit 5 has been welded to inner tube mobile jib 4 lower extreme fixed welding, discharge opening 6 has been seted up to inner tube mobile jib 4 barrel, the direction of 6 inclined holes of discharge opening is the same with the direction of digging soon, is convenient for arrange the material, when the construction, gets the core pore-forming by auxiliary drill bit 5 contact stratum earlier, then auxiliary drill bit 5 has got the pile hole center empty when main drill bit 2 contacts the stratum, and the dynamics that receives when main drill bit 2 carries out the pore-forming at last will be far less than directly once pore-forming. The auxiliary drill bit 5 and the main drill bit 2 can drill at two points and one line to play a complementary role, and the common problems of inclined holes and deviated holes in construction are solved.

The working principle is as follows: see fig. 1, the utility model discloses mainly be through inner tube mobile jib 4 the perpendicular concentric welding of main drill bit 2 and auxiliary drill bit 5, the 5 diameters of auxiliary drill bit 2 diameters of main drill bit are little, get the core pore-forming earlier by auxiliary drill bit 5 during the construction, then auxiliary drill bit 5 has got the sky to stake hole center when main drill bit 2 contacts the stratum, the dynamics that receives when main drill bit 2 carries out the pore-forming at last will be much less than the once pore-forming of direct major diameter drill bit, two points of auxiliary drill bit 5 and main drill bit 2 a line of drilling can play the effect of supplementing each other mutually, common inclined hole in the construction has been solved, the problem in inclined hole.

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

1. An auxiliary double-barrel drill bit, which is characterized in that: including upper cover plate (1), the outside welding of upper cover plate (1) has main drill bit (2), position fixedly connected with triangle reinforcing plate (3) between upper cover plate (1) and main drill bit (2), the welding of the center bottom of upper cover plate (1) has inner tube mobile jib (4), the fixed welding of inner tube mobile jib (4) lower extreme has auxiliary drill bit (5), relief hole (6) have been seted up to inner tube mobile jib (4) stack shell, relief hole (6) inclined hole orientation with dig the orientation the same soon, be convenient for arrange the material.

2. A secondary double barrel drill according to claim 1 wherein: the section diameter of the main drill bit (2) is larger than that of the auxiliary drill bit (5).

3. A secondary double barrel drill according to claim 1 wherein: the inner cylinder main rod (4) is vertically and concentrically welded with the main drill bit (2) and the auxiliary drill bit (5).