CN203796177U

CN203796177U - Drilling tool

Info

Publication number: CN203796177U
Application number: CN201420172925.XU
Authority: CN
Inventors: 刘彦杰; 范聚朝; 曹忠常; 钟占良; 赵静
Original assignee: No49 Engineering Division China Coal No5 Construction Co
Current assignee: No49 Engineering Division China Coal No5 Construction Co
Priority date: 2014-04-11
Filing date: 2014-04-11
Publication date: 2014-08-27
Anticipated expiration: 2024-04-11

Abstract

The utility model discloses a drilling tool, which consists of a drill bit (1), a drill rod (3) and a bit shank (4), wherein the drill bit (1) is a dual-functional drill bit with functions of a percussion bit and a roller bit; the drill rod (3) is a hexagonal socket hole twist drill rod; the bit shank (4) is hollow hexahedral steel. Compared with the prior art, the drilling tool of which the claw-shaped alloy drill bit has percussion and cutting functions has the advantages that (1) the problems of low hole drilling speed, low hole forming rate and the like during the construction of a freezing shaft are solved; (2) by the hexahedral hollow angle steel twist drill rod and the claw-shaped alloy drill bit, the strengths of the drill bit and the drill rod are strengthened, the phenomena of clamping of the drill rod and blocking of the drill bit are prevented, and the problems of long hole drilling time and low drilling footage speed are also solved, so that the unit cyclic drilling footage is greatly improved, time for each procedure is shortened, and the direct circulation rate is increased.

Description

A kind of drilling tool

Technical field

The utility model relates to a kind of drilling tool, and especially a kind of drilling rod is that six rib hollow angle steel twist drill rods, drill bit are the drilling tool of goat's horn type alloy bit.

Background technology

Growing along with China's economic level, coal building size increases day by day, and China is building large-scale mine more and more.The pit shaft of large-scale mine is dark, diameter is large, and the cycle request of mine construction is short, and speed is fast.Therefore high-quality, fast, efficiently build large-scale pit shaft and become one of market competition and pursue a goal greatly.In this century, China's coal-mine construction is transferred to mountain, Shan, sweet illiteracy is the mine of western of main body, mineshaft diameter reaches 8m～12m, mine shaft depth 600m～1200m, in pit shaft Quaternary Strata, show soil and only account for 5～10%, the stratum that pit shaft passes through is mainly with weakness moisture Tertiary Period, the Cretaceous period, Jurassic Period, sandstone was main, formation pore structure, moisture abundant, due to Geological Reasons, aquifer mostly is Porosity Aquifer, the method such as pre grouting from the surface or the pre grouting from the working face effect of harnessing the river is not remarkable, facts have proved that adopting freezing process is effective sinking method (the generally application of freeze sinking, the increase of the depth of frost penetration, even full well freezes, freeze really to have improved table soil, the stability of broken basement rock), common drilling tool sharp freezing driving speed is slowly (as the umbrella with conventional bores yi word pattern metal bit and six rib hollow angle steel drilling rods, in perforating process, drill bit is wrapped up by mud, powder in eye cannot be blown out, while joining goat's horn type drill bit with common twist drill rods, drill bit, drilling rod intensity are low, the easy loss of drill bit, drilling rod is flexible fractures, and bit freezing bar often appears in two kinds of modes, stifled drill bit phenomenon, has reduced borehole and has become porosity, perforating difficulty and driving speed have been increased slow), therefore, designing the fast drilling tool of a kind of sharp freezing driving speed, is the current technical issues that need to address.

Summary of the invention

Technical problem to be solved in the utility model is to provide the fast drilling tool of a kind of sharp freezing driving speed.

The technical scheme in the invention for solving the technical problem is:

A drilling tool, is comprised of drill bit, drilling rod and bit shank, and drill bit is the difunctional drill bit that possesses drill hammer function and rotary drilling-head function, and drilling rod is inner hexagonal hole twist drill rods, the hollow six-edged steel that bit shank is.

As a kind of preferred version of the present utility model, the diameter of drilling rod is 30 ㎜, and the spiral height of drilling rod is 5 ㎜, and pitch is 70 ㎜; The circumscribed circle diameter of the inner hexagonal hole of drilling rod is 25 ㎜, and the rotation direction of spiral is contrary with the direction of rotation of rig, and run of steel can be customized according to construction requirement.

As a kind of preferred version of the present utility model, the across flats of the hollow six-edged steel of bit shank is 25 * 25, and aperture is 10 ㎜, and it is 360 ㎜ that the length of bit shank is removed.

As a kind of preferred version of the present utility model, the tail end of drilling rod has the ￠ 20 ㎜ internal threads of length 30 ㎜, and the front end of bit shank has the ￠ 20 ㎜ external screw threads of length 30 ㎜, and bit shank is connected with drill rod thread.

As a kind of preferred version of the present utility model, between drill bit, drilling rod, be provided with silk, the front end of drilling rod has the ￠ 24 ㎜ internal threads of length 25 ㎜, the ￠ 24 ㎜ external screw threads that the rear end of silk had to length 25 ㎜, drilling rod with silk is threaded, there are the ￠ 28 ㎜ internal threads of length 30 ㎜ the rear end of drill bit, the front end of silk is had to the ￠ 28 ㎜ external screw threads of length 30 ㎜, drill bit with silk is threaded.

As a kind of preferred version of the present utility model, the leading portion of drill bit is goat's horn type drill bit, and back segment is dish-type drill bit, and the material of drill bit is alloy steel, and the length of drill bit is 111 ㎜; The diameter of drill bit is 55 ㎜.

When construction, to note following item:

Six rib hollow angle steel twist drill rods bit shanks of the present utility model easily rupture with being threaded with drilling rod, and impact force strengthens disconnected bit shank phenomenon may occur, and therefore in perforating process, need umbrella to bore operative employee and know umbrella brill hints on operation.

Compared with prior art, because goat's horn type alloy bit of the present utility model meets impact, cutting function, therefore have the following advantages:

(1) problems such as perforating speed is slow in freezing shaft construction, one-tenth porosity is low have been solved;

(2) six rib hollow angle steel twist drill rods and goat's horn type alloy bit have not only increased drill bit, drilling rod intensity, and bit freezing bar, stifled drill bit phenomenon have been overcome, also solved that the perforating time is long, penetration rate is slow, greatly improved unit cyclic advance amount and shortened each activity time, having improved direct circulation rate.

Accompanying drawing explanation

Fig. 1 is the front view (broken section) of structural representation of the present utility model;

Fig. 2 is that the A-A of Fig. 1 is to sectional drawing;

Fig. 3 is that the B-B of Fig. 1 is to sectional drawing;

Fig. 4 is that the C of Fig. 1 is to view.

The specific embodiment

As shown in the figure, a kind of drilling tool, is comprised of drill bit 1, drilling rod 3 and bit shank 4, it is characterized in that, drill bit 1 is for possessing the difunctional drill bit of drill hammer function and rotary drilling-head function, and drilling rod 3 is inner hexagonal hole twist drill rods, the hollow six-edged steel that bit shank 4 is.

The diameter of drilling rod 3 is 30 ㎜, and the spiral height of drilling rod 3 is 5 ㎜, and pitch is 70 ㎜; The circumscribed circle diameter of the inner hexagonal hole of drilling rod 3 is 25 ㎜, and the rotation direction of spiral is contrary with the direction of rotation of rig.

The across flats of the hollow six-edged steel of bit shank 4 is 25 * 25, and aperture is 10 ㎜, and it is 360 ㎜ that the length of bit shank 4 is removed.

The tail end of drilling rod 3 has the ￠ 20 ㎜ internal threads of length 30 ㎜, and the front end of bit shank 4 has the ￠ 20 ㎜ external screw threads of length 30 ㎜, and bit shank 4 is threaded with drilling rod 3.

Between drill bit 1, drilling rod 3, be provided with silk 2, the front end of drilling rod 3 has the ￠ 24 ㎜ internal threads of length 25 ㎜, the ￠ 24 ㎜ external screw threads that the rear end of silk 2 had to length 25 ㎜, drilling rod 3 with silk 2 is threaded, there are the ￠ 28 ㎜ internal threads of length 30 ㎜ the rear end of drill bit 1, the ￠ 28 ㎜ external screw threads that the front end of silk 2 had to length 30 ㎜, drill bit 1 with silk 2 is threaded.

The leading portion of drill bit 1 is goat's horn type drill bit, and back segment is dish-type drill bit, and the material of drill bit is alloy steel, and the length of drill bit 1 is 111 ㎜; The diameter of drill bit 1 is 55 ㎜.

Claims

1. a drilling tool, drill bit (1), drilling rod (3) and bit shank (4), consist of, it is characterized in that, drill bit (1) is for possessing the difunctional drill bit of drill hammer function and rotary drilling-head function, drilling rod (3) is inner hexagonal hole twist drill rods, the hollow six-edged steel that bit shank (4) is.

2. a kind of drilling tool according to claim 1, is characterized in that, the diameter of drilling rod (3) is 30 ㎜, and the spiral height of drilling rod (3) is 5 ㎜, and pitch is 70 ㎜; The circumscribed circle diameter of the inner hexagonal hole of drilling rod (3) is 25 ㎜, and the rotation direction of spiral is contrary with the direction of rotation of rig.

3. a kind of drilling tool according to claim 1, is characterized in that, the across flats of the hollow six-edged steel of bit shank (4) is 25 * 25, and aperture is 10 ㎜, and it is 360 ㎜ that the length of bit shank (4) is removed.

4. according to a kind of drilling tool described in claim 2 or 3, it is characterized in that, the tail end of drilling rod (3) has the ￠ 20 ㎜ internal threads of length 30 ㎜, and the front end of bit shank (4) has the ￠ 20 ㎜ external screw threads of length 30 ㎜, and bit shank (4) is threaded with drilling rod (3).

5. according to a kind of drilling tool described in claim 2 or 3, it is characterized in that, between drill bit (1), drilling rod (3), be provided with silk (2), the front end of drilling rod (3) has the ￠ 24 ㎜ internal threads of length 25 ㎜, the ￠ 24 ㎜ external screw threads that the rear end of silk (2) had to length 25 ㎜, drilling rod (3) with silk (2) is threaded, there are the ￠ 28 ㎜ internal threads of length 30 ㎜ the rear end of drill bit (1), the ￠ 28 ㎜ external screw threads that the front end of silk (2) had to length 30 ㎜, drill bit (1) with silk (2) is threaded.

6. a kind of drilling tool according to claim 1, is characterized in that, the leading portion of drill bit (1) is goat's horn type drill bit, and back segment is dish-type drill bit, and the material of drill bit is alloy steel, and the length of drill bit (1) is 111 ㎜; The diameter of drill bit (1) is 55 ㎜.