CN201648417U

CN201648417U - High-angle drill for tap hole of blast furnace

Info

Publication number: CN201648417U
Application number: CN201020110592XU
Authority: CN
Inventors: 王恩余
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-02-09
Filing date: 2010-02-09
Publication date: 2010-11-24
Anticipated expiration: 2020-02-09

Abstract

The utility model relates to a high-angle drill for a tap hole of a blast furnace. The technical scheme is that the high-angle drill comprises a base and an edge knife; a main vent hole is formed at the center of the base; 3-5 wings are uniformly arranged at the upper end of the base; a knife groove is formed at the center of each wing; the edge knife is welded in the knife groove, a knife body of the edge knife is matched with the knife groove, and a knife edge thereof is higher than the knife groove; and a lateral vent hole is formed on the lateral wall of the base between the two wings, inclines towards the main vent hole and is communicated with the main vent hole. The high-angle drill is characterized in that the side of the edge knife protrudes out of the edge of the upper end of the base and is provided with a lateral edge. The high-angle drill has the advantages of low cost and quick opening speed.

Description

High-angle drill of blast furnace iron notch

Technical field

The invention relates to the drill bit field, relates in particular to a kind of drill bit that blast furnace iron notch taphole drilling machine drilling rod is used that is used for.

Background technology

Going out the scum operation before the State of Blast Furnace is the crucial link that blast furnace is produced, and it is crucial that timely opening goes out most scum.The patent No. that the inventor applied in 2007 is 200710012568.5 patent of invention, solved used in the prior art drill bit, because angle of throat is horizontal, just the cutting edge of all angle of throats all is on the same horizontal plane, therefore when boring mouthful, duration of service resistance short, that be subjected to big, bore problem motionless, that opening time is long.Thereby invented high-angle drill, because angle of throat has to the centre hole oblique features, make that opening speed is fast.But through this practice in several years, there are the following problems to find high-angle drill: the angle of throat side on the drill bit is concordant with the pedestal outer rim, and the base material consumption is big, the production cost height; The width and the degree of depth that are located at the groove on the pedestal sidewall also are crucial numerical value, if width is wide, the degree of depth is dark, and the width of the wing reduces relatively so, as being that the drill bit of 55mm specification is an example with the diameter, its recess width is generally 20mm, and the degree of depth is generally 8mm, when opening, the intensity of the wing is hanged down easy deformation, thereby make angle of throat easily in the cutter groove, come off, need more bit change, not only influence opening speed, and waste material, also make opening cost height, if width is little, depth as shallow, so when opening, ventilation reduces, and influences deslagging speed, and then influences opening speed.

Summary of the invention

In order to address the above problem, the invention provides a kind of opening speed fast, the high-angle drill of blast furnace iron notch that cost is low.

The technical scheme that the invention is adopted is: a kind of high-angle drill of blast furnace iron notch, comprise pedestal and angle of throat, and the center of pedestal is provided with main ventilating pit, and 3～5 wings are evenly made in the upper end of pedestal, are shaped on the cutter groove at the center of each wing; Angle of throat is welded in the cutter groove, and the cutter hub of angle of throat and cutter groove match, and cutting edge is higher than the cutter groove, is provided with the side ventilating pit on the sidewall of the pedestal between two wings, and the side ventilating pit tilts to main ventilating pit, and the side ventilating pit communicates with main ventilating pit; It is characterized in that: the side of angle of throat protrudes in the upper end outer rim of pedestal and has side edge.

Described high-angle drill of blast furnace iron notch, pedestal is cylindrical or is that two sections stageds are cylindrical, the circular diameter of the pedestal upper end at angle of throat place is 40～100mm, on the sidewall of the pedestal between two wings, be shaped on groove, groove is made the wide shape that narrows down gradually downwards, the width of the widest part of groove is 10～15mm, and the inside degree of depth of the mid point of groove the widest part is 3～5mm, and the hole of side ventilating pit is located on the groove.

The beneficial effect of the invention is: the one,, because angle of throat is designed to the outer rim that side edge protrudes in the pedestal upper end, compare with the drill bit of original same size, the outside diameter of drill bit pedestal reduces, therefore reduced the raw material of pedestal relatively, saved manufacturing cost greatly, because the side of drill bit also has angle of throat, increased opening speed on the contrary by practice.The 2nd; adopted the specified proportion of pedestal columniform diameter in upper end and groove; when making the width of the wing satisfy opening fully, the requirement of protection angle of throat is through practice; during opening; the wing is not yielding, and angle of throat does not come off, and opening only needs 1～2 drill bit to get final product; reduce the opening cost, also accelerated opening speed simultaneously.The 3rd,, though the width and the degree of depth of groove have diminished relatively, but because angle of throat is designed to the outer rim that side protrudes in the pedestal upper end, when opening, the angle of throat side contacts with the State of Blast Furnace body wall, forms the space naturally between formed disc of angle of throat outer rim and the formed disc of pedestal upper end outer rim, air output increases when making opening, simultaneously make that also slagging channel had increased than originally, be easier to deslagging, make opening speed increase.

Description of drawings

Fig. 1 is the one-piece construction synoptic diagram of the invention;

Fig. 2 is the sectional view of the invention.

Embodiment

Embodiment 1

As depicted in figs. 1 and 2, a kind of high-angle drill of blast furnace iron notch comprises pedestal 1 and angle of throat 2, and it is cylindrical that pedestal 1 is made two sections stageds.The center of pedestal 1 is provided with main ventilating

pit

3, and 3～4 wings are evenly made in the upper end of pedestal 1, are shaped on cutter groove 4 at the center of each wing; Angle of throat 2 is welded on 4 li of cutter grooves, and the cutter hub of angle of throat 2 and cutter groove 4 match, and cutting edge is higher than cutter groove 4, is provided with side ventilating pit 5 on the sidewall of the pedestal between two wings 1, and side ventilating pit 5 tilts to main ventilating pit 3, and side ventilating pit 5 communicates with main ventilating pit 3.

The side of angle of throat 2 protrudes in the upper end outer rim of pedestal 1 and has side edge 7.

The circular diameter of pedestal 1 upper end at angle of throat 2 places is made 40～100mm, on the sidewall of the pedestal between two wings 1, be shaped on groove 6, groove 6 is made the wide shape that narrows down gradually downwards, the width L of the widest part of groove 6 is 10～15mm, the inside depth H of the mid point of groove 6 the widest part is 3～5mm, and the hole of side ventilating pit 5 is located on the groove.

With φ 55 drill bits is example: the circular diameter of pedestal 1 upper end at angle of throat 2 places is made 50mm, and the width L of the widest part of groove 6 is 12mm, and the inside depth H of the mid point of groove 6 the widest part is 3.5mm.

The present embodiment drill bit is that two sections stageds are cylindrical, also can adopt pedestal integral body be one cylindrical.

Claims

1. a high-angle drill of blast furnace iron notch comprises pedestal (1) and angle of throat (2), and the center of pedestal (1) is provided with main ventilating pit (3), and 3～5 wings are evenly made in the upper end of pedestal (1), are shaped on cutter groove (4) at the center of each wing; Angle of throat (2) is welded on cutter groove (4) lining, the cutter hub of angle of throat (2) and cutter groove (4) match, cutting edge is higher than cutter groove (4), on the sidewall of the pedestal between two wings (1), be provided with side ventilating pit (5), side ventilating pit (5) tilts to main ventilating pit (3), and side ventilating pit (5) communicates with main ventilating pit (3); It is characterized in that: the side of angle of throat (2) protrudes in the upper end outer rim of pedestal (1) and has side edge (7).

2. according to the described high-angle drill of blast furnace iron notch of claim 1, it is characterized in that: pedestal (1) is cylindrical or is that two sections stageds are cylindrical, the circular diameter of pedestal (1) upper end at angle of throat (2) place is 40～100mm, on the sidewall of the pedestal between two wings (1), be shaped on groove (6), groove (6) is made the wide shape that narrows down gradually downwards, the width of the widest part of groove (6) is 10～15mm, the inside degree of depth of mid point of groove (6) the widest part is 3～5mm, and the hole of side ventilating pit (5) is located on the groove.