CN201317784Y - Self-cooling blast furnace tap hole bit - Google Patents

Abstract

The utility model relates to a self-cooling blast furnace tap hole bit. An internal thread is arranged in the cavity at the lower end of a bit body, and the upper end is an air cavity. A first air port lug and a second air port lug processed on the top end are positioned in a second phase and a fourth phase. A first fixed knife lug and a second fixed knife lug are positioned in a first phase and a third phase. The first air port and the second air port are communicated with the air cavity of the bit body. A second alloy blade which is fixedly connected by a second fixed pin is arranged in the space formed by the first air port lug and the second fixed knife lug. A first alloy blade which is fixedly connected by a first fixed pin is arranged in the space formed by the second air port lug and the first fixed knife lug. A first dump tank is arranged between the first air port lug and the first fixed knife lug. A second dump tank is arranged between the second air port lug and the second fixed knife lug. The top of the bit body is a whole inclined plane with an angle of alpha. The sealing mud corresponding to the tap hole bit has strong drilling performance, deep drilling size and rapid drilling speed. The self-cooling blast furnace tap hole bit is suitable for tap hole operation of various metallurgy blast furnaces.

Description

Self-cooled blast furnace iron notch drill bit

Technical field

The utility model relates to a kind of drill bit, relates in particular to a kind of being applied to and emits blast-melted self-cooled blast furnace iron notch drill bit for opening the metallurgy high furnace iron notch on the metallurgy high furnace.

Background technology

Before utility model, be used to open the metallurgy high furnace iron notch and all use iron notch bore bit or iron notch drill bit, though its title is identical substantially, but the structure or the shape of iron notch drill bit or iron notch bore bit differ from one another, they can both bring into play effect separately on the metallurgy high furnace of various nominal capacities, as ZL2005200528150 " blast furnace open hole drill bit ", ZL2006200498728 " a kind of long-acting metallurgy high furnace tapping outlet bore bit ", ZL2006200521160 " blast furnace open hole drill bit " is exactly several examples wherein, before metallurgy high furnace taps a blast furnace, all once use the drill bit or the bore bit of these several forms and opened blast furnace iron notch, but because the nose shape of these drill bits or bore bit is tack basically, the easily impaired distortion of heating of head in opening the tunneling process of iron notch, tunnelling footage is restricted, must change bore bit or drill bit could be got through iron notch for large blast furnace, influence job schedule, increase production cost, strengthened labor intensity of operating personnel.

Summary of the invention

The purpose of this utility model is to provide a kind of tunnelling footage length, driving speed is fast and the disposable self-cooled blast furnace iron notch drill bit of getting through various blast furnace iron notch of energy.

For achieving the above object, the technical solution adopted in the utility model is: the frame of the bit with a circle of high-quality steel work, this frame of the bit lower end inner chamber is processed into internal thread, and shape the best of this internal thread is a corrugated thread, so that the drilling rod of Shi Yonging matches with it.Upper end wall at frame of the bit is processed with small-bore centre porosity.The head integral body of frame of the bit is processed as beveled, and its scarp becomes the α angle with horizontal plane.Be processed with the first blowing mouth projection and the second blowing mouth projection at the top of frame of the bit, on the first blowing mouth projection and the second blowing mouth projection, be processed with first blowing mouth and second blowing mouth, first blowing mouth and second blowing mouth all are communicated with the wind chamber of frame of the bit, make external air (as pressurized air) can enter each blast inlet, left blower mouth of processing on the first blowing mouth projection and the second blowing mouth projection and right blower mouth are communicated with first blowing mouth and second blowing mouth respectively.Also be processed with the first stationary knife projection and the second stationary knife projection on the frame of the bit top, on the first stationary knife projection, be processed with first and put the pin cave, be processed with second on the second stationary knife projection and put the pin cave.Second alloy blade that useful second tumbler pin is connected in the first blowing mouth projection and the formed space of the second stationary knife projection, first alloy blade that useful first tumbler pin is connected in the second blowing mouth projection and the formed space of the first stationary knife projection, two edge lengths of described first alloy blade and second alloy blade are different.Constitute first ash pit between the first blowing mouth projection and the first stationary knife projection, constitute second ash pit between the second blowing mouth projection and the second stationary knife projection, the end of first ash pit and second ash pit is circular arc or semicircle, can shorten the deslagging time.

Adopt a kind of self-cooled blast furnace iron notch drill bit that as above technical scheme provides compared with prior art, technique effect is:

1. the small-bore centre porosity in the processing of frame of the bit top can strengthen cold air blast velocity and atomizing cooling performance;

2. designed prolate blowing mouth and left and right sides air port in that each carbide chip is other, the cutter sharpener mouth when carbide chip work than conventional bit is lowered the temperature 200～300 ℃, has guaranteed that alloy blade works at a lower temperature, guarantees the hardness of alloy blade.

3. the wind chamber on frame of the bit inner chamber top can guarantee the required air-flow properly distributed of each blowing mouth, can guarantee each alloy blade cooling evenly;

4. adopt the heavy caliber ash pit of slagging tap, be easy to deslagging (bits);

5. the installation external diameter of each alloy blade helps the whole cooling of iron notch drill bit greater than the external diameter of frame of the bit upper end matrix;

6. the iron notch drill bit adopts two alloy knife chips and edge tilted formula, can cut fast, and the mud that seals of ultrahard is had the saturating performance of fabulous brill;

7. result of use is good, and as having one need self-cooled iron notch drill bit of 3～4 meters dark iron notch metallurgy high furnaces and supporting drilling rod just iron notch can be got through for one, the time only needs 2.5～3.0min, has alleviated labour intensity, saves cost more than 50%.

Description of drawings

Fig. 1 is the forward cross-sectional schematic of a kind of self-cooled blast furnace iron notch drill bit described in the utility model, also is the B-B line cross-sectional schematic along Fig. 2, is used as Figure of abstract of the present utility model.

Fig. 2 is the A-A line cross-sectional schematic along Fig. 1, also is the schematic top plan view of Fig. 1.

Embodiment

Below in conjunction with accompanying drawing tool present embodiment of the present utility model is described in further detail.

Described a kind of self-cooled blast furnace iron notch drill bit global shape is the cylindrical drill that a high-quality steel is done, inner chamber is processed with internal thread in the lower end of frame of the bit 1, the shape of screw thread is wanted can be identical with matching used drilling rod, be generally corrugated thread, easy accessibility, the inner chamber upper end of frame of the bit 1 forms wind chamber 1A, can be rationally to each blowing mouth air-supply.Be processed with centre porosity 4 on the upper end wall of frame of the bit 1, centre porosity 4 generally is processed into small-bore centre porosity, and pressurized air is flowed through can strengthen cold air blast velocity and atomizing cooling performance behind the centre porosity 4.Be processed with the first blowing mouth projection 2 and the second blowing mouth projection 2A at the top of frame of the bit 1, as shown in Figure 2, the first blowing mouth projection 2 and the second blowing mouth projection 2A position frame of the bit 1 top formed second mutually with the 4th mutually in, perhaps the position is first mutually and in the third phase, and one side of the first blowing mouth projection 2 and the second blowing mouth projection 2A overlaps with a certain diameter line at frame of the bit 1 top.Be processed with first blowing mouth 3 on the first blowing mouth projection 2, be processed with the second blowing mouth 3A on the second blowing mouth projection 2A, first blowing mouth 3 and the second blowing mouth 3A are communicated with the wind chamber 1A of frame of the bit 1 simultaneously.First blowing mouth 3 and the second blowing mouth 3A optimal selection prolate shape can reduce the alloy blade temperature, guarantee alloy blade high rigidity at a lower temperature.Left blower mouth of processing on the first blowing mouth projection 2 and the second blowing mouth projection 2A 10 and right blower mouth 10A are communicated with first blowing mouth 3 and the second blowing mouth 3A respectively, can strengthen the cooling to the second alloy blade 7A, first alloy blade 7.Be processed with the first stationary knife projection 5 and the second stationary knife projection 5A at the top of frame of the bit 1, the described first stationary knife projection 5 and the second stationary knife projection 5A position become at frame of the bit 1 top first mutually and in the third phase, perhaps the position second phase with the 4th mutually in.On the first stationary knife projection 5 and the second stationary knife projection 5A, be processed with the first rationed marketing cave 6 and the second rationed marketing cave 6A.The second alloy knife gold plaque 7A that is coated with the second tumbler pin 9A is placed in the space of the first blowing mouth projection 2 and second stationary knife projection 5A formation, first alloy blade, 7 positions that are coated with first tumbler pin 9 are in the space that the second blowing mouth projection 2A and the first stationary knife projection 5 form, and first tumbler pin 9 and the second tumbler pin 9A are in first and put pin cave 6 and second and put among the 6A of pin cave.The periphery of when first alloy blade 7 and the second alloy blade 7A are installed, their bit being stretched out frame of the bit 1 head, make the matrix external diameter of the complete installation external diameter of first alloy blade 7 and the second alloy blade 7A greater than frame of the bit 1, help the integral body cooling of tapping outlet drill bit, described first alloy blade 7 and the second alloy blade 7A are carbide chip, prior art, pearl continent, Hunan Province cemented carbide works has product-feed.Adopting the high frequency brazing technology that first tumbler pin 9 is welded on first puts in the pin cave 6, weldering is completely tied, equally the second tumbler pin 9A being welded in second puts among the 6A of pin cave, weldering is completely tied, and the solid welding of arc welding mode is adopted at the alloy blade center, high temperature resistant, can guarantee not come off when first alloy blade 7 and the second alloy blade 7A withdraw from after the high temperature drilling.Between the first blowing mouth projection 2 and the first stationary knife projection 5, first ash pit 8 is arranged, and the second ash pit 8A is arranged between the second blowing mouth projection 2A and the second stationary knife projection 5A, the baseplane of described first ash pit 8 and the second ash pit 8A also is the scarp, the angle of this scarp and horizontal plane also is α, they are the heavy caliber slag-drip opening, are easy to deslagging.As seen from Figure 1, Figure 2, the first blowing mouth projection 2 and the second blowing mouth projection 2A, the first stationary knife projection 5 are identical with the level of the second stationary knife projection 5A, and the pitch angle is identical, is α.And the level of first alloy blade 7 and the second alloy blade 7A is greater than the height of blowing mouth projection and stationary knife projection, and the surface tilt angle of alloy blade also is α, generally gets α=10～15 degree.

During use, described a kind of self-cooled blast furnace open hole drill bit is linked to each other with matching used rig, start rig, drill bit is squeezed into the iron mouth can realize the brill of iron notch saturating.After certain tapping outlet is opened, can take off oldly, more renew.In a certain flow process, only need just can reach purpose described in the utility model with an iron notch drill bit.

Claims (3)

1, a kind of self-cooled blast furnace iron notch drill bit, lower end inner chamber at frame of the bit (1) is processed with internal thread, the inner chamber upper end of frame of the bit (1) forms wind chamber (1A), it is characterized in that: be processed with centre porosity (4) on the upper end wall of frame of the bit (1), the first blowing mouth projection (2) of frame of the bit (1) top processing and second blowing mouth projection (2A) position frame of the bit (1) top second mutually with the 4th mutually in, second blowing mouth (3A) on first blowing mouth (3) on the first blowing mouth projection (2) and the second blowing mouth projection (2A) is communicated with the wind chamber (1A) of frame of the bit (1), is communicated with first blowing mouth (3) and second blowing mouth (3A) respectively at the left blower mouth (10) and the right blower mouth (10A) of the first blowing mouth projection (2) and the second blowing mouth projection (2A); The first stationary knife projection (5) of frame of the bit (1) top processing and second stationary knife projection (5A) position frame of the bit (1) top first mutually with third phase in, on the first stationary knife projection (5) and the second stationary knife projection (5A), be processed with the first rationed marketing cave (6) and the second rationed marketing cave (6A), second alloy blade (7A) that is coated with second tumbler pin (9A) is placed in the space of the first blowing mouth projection (2) and the formation of the second stationary knife projection (5A), first alloy blade (7) that is installed on first tumbler pin (9) is placed in the space that the second blowing mouth projection (2A) and the first stationary knife projection (5) form, and first tumbler pin (9) and second tumbler pin (9A) one is in first and puts pin cave (6) and second and put in the pin cave (6A); Between the first blowing mouth projection (2) and the first stationary knife projection (5), first ash pit (8) is arranged, between the second blowing mouth projection (2A) and the second stationary knife projection (5A), second ash pit (8A) is arranged.

2, a kind of self-cooled blast furnace iron notch drill bit according to claim 1 is characterized in that: the surface tilt angle of the first blowing mouth projection (2), the second blowing mouth projection (2A), the first stationary knife projection (5), the second stationary knife projection (5A) and first alloy blade (7), second alloy blade (7A) is α.

3, a kind of self-cooled blast furnace iron notch drill bit according to claim 1 is characterized in that: first ash pit (8) and or the baseplane of second ash pit (8A) and the angle of horizontal plane be α.

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