CN201763247U

CN201763247U - Single-cone single spiral bit for rotary drill

Info

Publication number: CN201763247U
Application number: CN201020519392XU
Authority: CN
Inventors: 曾广胜; 李新桥; 鲁纪鸣; 许超; 姜炎炼
Original assignee: 李新桥
Priority date: 2010-09-07
Filing date: 2010-09-07
Publication date: 2011-03-16
Anticipated expiration: 2020-09-07

Abstract

A single-cone single spiral bit for a rotary drill comprises a cylindrical core shaft tube, which is provided with a flange at the top and with a spiral blade at the periphery. An upper end of the spiral blade is connected with an upper plate, and a lower end with a lower plate, wherein the upper plate is fixed to an upper end of the cylindrical core shaft tube and the lower plate is fixed to a lower end of the cylindrical core shaft tube. The lower end of the cylindrical core shaft tube is connected with an infinity-shaped bottom end, below which two cones are arranged. Front ends of the two cones are both provided with bullet picks. The single-cone single spiral bit for the rotary drill of the utility model, which is not only strong in drilling ability and low in energy consumption, but also good in stability and guidance, enables to effectively prevent the generation of inclined holes and is especially suitable for drilling in weathered bedrocks and in gravel stratum with good cementing properties.

Description

Rotary drilling rig is bored the single-screw drill bit with list

Technical field

The utility model relates to the short augers of a kind of rotary drilling rig, especially relates to a kind of rotary drilling rig and bores the single-screw drill bit with list.

Background technology

Rotary drilling rig is the construction machinery of pore-forming operation in a kind of suitable building foundation engineering.Mainly be suitable for soil layer constructions such as sand, cohesive soil, slity soil, in multiple foundation basic constructions such as castinplace pile, diaphragm wall, underpin, be used widely.Such rig cooperates different drilling tools, is applicable to the pore-forming operation of dry type (short spiral) or wet type (revolution bucket) and rock stratum (rock core drill).According to the formation drilling difference, short augers is divided into short augers of embedding rock and the short augers of soil layer.Generally speaking, the short augers of embedding rock mostly is the conehead form, and the short augers of soil layer mostly is the tack form.

At present, in use there is following problem in short augers: (1) single-screw drill bit is in drilling process, and stability and guidance quality are poor, makes the hole irregularity of brill, forms inclined hole easily, does not reach designing requirement; When (2) carrying out drilling construction, the smear metal blade resistance of drill bit is big, increases along with creeping into moment of torsion, and creep into resistance and strengthen, the energy consumption height, drilling tool the pressure of the drill strengthens, and makes drill bit fragile.

The utility model content

The purpose of this utility model is to overcome the above-mentioned defective that the short augers of existing rotary drilling rig exists, and provides a kind of stability and guidance quality good, the single awl single-screw drill bit of the rotary drilling rig that energy consumption is low.

The purpose of this utility model is achieved through the following technical solutions: it comprises the cylindrical core central siphon, described cylindrical core central siphon top is provided with flange, cylindrical core central siphon periphery is provided with helical blade, the helical blade upper end is connected with upper plate, the lower end is connected with lower plate, upper plate is fixed in cylindrical core central siphon upper end, and lower plate is fixed in cylindrical core central siphon lower end.Be connected to ∞ type bottom below the cylindrical core central siphon, described ∞ type is two cones below the bottom, and two cone front ends all are equipped with the sub warhead pick.

Below be further improved preferred version:

Described cylindrical core central siphon diameter is less than the length of ∞ type bottom.

Be evenly distributed with 3 ~ 6 sub warhead picks on the described lower plate.

Described helical blade the first half is forward type (a blade equal diameter), and the latter half is conehead type (blade diameter from large to small), and each pitch equates that the conehead part edge is evenly distributed with the sub warhead pick.

Described two cone front ends respectively are equipped with three sub warhead picks, and three sub warhead picks are mutually 90 ° ~ 110 ° angles.

The utility model is because the ∞ of core tube type two bottoms two cone front ends all are equipped with the sub warhead pick, when augers contacts with soil layer, become present taper seat contact by traditional some contact, the stability and the guidance quality of creeping into are improved greatly, can reduce the generation of inclined hole effectively; Because the length of ∞ type bottom greater than the diameter of cylindrical core central siphon, when spiral creeps into soil layer, has only ∞ type part and soil layer contact friction, and on the cylindrical core central siphon not can with the soil layer contact friction, creep into resistance thereby reduced, reduced energy consumption.

Description of drawings

Fig. 1 is the utility model embodiment overall structure schematic diagram.

Fig. 2 is a cylindrical core central siphon ∞ type bottom enlarged drawing embodiment illustrated in fig. 1.

Fig. 3 is Fig. 2 A-A place sectional view.

Fig. 4 is Fig. 2 B-B place sectional view.

Fig. 5 is Fig. 2 C-C place sectional view.

The specific embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing.

As shown in Figure 1, present embodiment comprises cylindrical core central siphon 7, cylindrical core central siphon 7 tops are provided with flange 5, cylindrical core central siphon 7 peripheries are provided with helical blade 4, helical blade 4 upper ends are connected with upper plate 6, the lower end is connected with lower plate 2, and upper plate 6 is fixed in cylindrical core central siphon 7 upper ends, and lower plate 2 is fixed in cylindrical core central siphon 7 lower ends.Helical blade 4 the first half are forward type, the latter half is the conehead type, helical blade 4 coneheads partly are evenly distributed with sub warhead pick I 3, be evenly distributed with 3 sub warhead pick II 8 on the lower plate 2, the lower end welding of cylindrical core central siphon 7 is connected with ∞ type bottom 1, and the diameter of cylindrical core central siphon 7 is less than the length of ∞ type bottom 1, be two cones below the ∞ type bottom 1, sub warhead pick III 9 is housed on two cones, and each three of quantity are mutually ~ 100 °; The affixed mode of the cone below the conehead of sub warhead pick I 3, sub warhead pick II 8, sub warhead pick III 9 and helical blade 4, lower plate 2, the ∞ type bottom 1 is welding-on, and sub warhead head and sub warhead pick are welded with tungsten-cobalt hard alloy.

Dig when creeping into when drill bit revolves, the sub warhead pick III 9 on 1 both sides, ∞ type bottom at first spiral is crept into soil layer, and the face of creeping into is a plane, makes the direction of creeping into more accurate, stable; Along with going deep into of creeping into, sub warhead pick II 8 on the lower plate 2 is started working, then the sub warhead pick I 3 of helical blade 4 coneheads part is also started working, constantly excavate soil layer, because cylindrical core central siphon 7 radiuses are little than ∞ type bottom 1 length, soil layer that excavates and 7 frictions of cylindrical core central siphon are little, are beneficial to and creep into, and save energy consumption.

It is little that the utility model not only creeps into energy consumption, and have good stable and guidance quality, can prevent the generation of inclined hole effectively, is specially adapted to creeping into of weathered rocks, ovum gravel stratum that cementing properties is good.

Claims

1. a rotary drilling rig is bored the single-screw drill bit with list, comprise the cylindrical core central siphon, described cylindrical core central siphon top is provided with flange, cylindrical core central siphon periphery is provided with helical blade, the helical blade upper end is connected with upper plate, the lower end is connected with lower plate, upper plate is fixed in cylindrical core central siphon upper end, lower plate is fixed in cylindrical core central siphon lower end, it is characterized in that: be connected to ∞ type bottom below the described cylindrical core central siphon, described ∞ type has two cones below the bottom, and two cone front ends all are equipped with the sub warhead pick.

2. rotary drilling rig according to claim 1 is bored the single-screw drill bit with list, and it is characterized in that: cylindrical core central siphon diameter is less than the length of ∞ type bottom.

3. rotary drilling rig according to claim 1 and 2 is characterized in that: be evenly distributed with 3 ~ 6 sub warhead picks on the described lower plate with single awl single-screw drill bit.

4. rotary drilling rig according to claim 1 and 2 is bored the single-screw drill bit with list, and it is characterized in that: the front end of two cones is equipped with three sub warhead picks respectively, and three sub warhead picks are mutually 90 ° ~ 110 ° angles.

5. rotary drilling rig according to claim 1 and 2 is bored the single-screw drill bit with list, and it is characterized in that: helical blade the first half is a forward type, and the latter half is the conehead type, and each pitch equates that conehead type part edge is evenly distributed with at least 3 sub warhead picks.