CN201002141Y

CN201002141Y - Drill bit

Info

Publication number: CN201002141Y
Application number: CNU2007200786857U
Authority: CN
Inventors: 张伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-06
Filing date: 2007-03-06
Publication date: 2008-01-09
Anticipated expiration: 2017-03-06

Abstract

The utility model discloses a drill bit for maintaining the damage of blast furnace wall, of which a drill gear is connected with an end of a barrel body, and the other end of the barrel body is connected with an end of an end cover, of which the other end is connected with a connecting screw head. The technical proposal of the utility model is that a furnace wall steel plate, a cooling wall and a dross layer attached on the cooling wall can be drilled through in the comparison with the prior hole burning technique, and the hole forming is fast, the hole is round and regular, the hole wall is smooth, and the gap between the hole wall is small after the cooling bar is arranged, and is fulfilled after grouting; the construction is free of safety hidden troubles, the maintenance efficiency and the output of the blast furnace can be greatly promoted and is energy saving.

Description

A kind of drill bit

Technical field:

The utility model relates to a kind of boring drill bit, particularly damages a kind of drill bit of usefulness about maintenance blast furnace furnace wall.

Background technology:

The cooling wall of blast furnace furnace wall often causes cooling wall to damage because of a variety of causes, influences ordinary production, mainly containing two kinds of methods at present handles: first blowing out, fall material, cooling replacing cooling wall, the method is long because of the construction time, causes the loss of a large amount of energy wastes and raw material.Though the method has employing, most factories have not used.It two is to use cooling stick.Promptly earlier with blast furnace boring, cooling stick is installed then, many cooling sticks are repaired the cooling wall function of having damaged with the cooling of point for face.Ripe and popularization along with the cooling stick production technology, after the cooling wall of the blast furnace furnace wall of most factories damages, all adopt perforate that the technology of cooling stick is installed, as seen the quality of perforate is most important, blast furnace furnace wall perforate technology adopts the oxygen hole burning at present, though the method is simple, potential safety hazard is big, speed of fulfiling hole is slow and irregular, easily cause stove skin steel plate stress to concentrate and ftracture, type of furnace variation has reduced converter life, because the pore-forming of oxygen hole burning is irregular, lose circle, easily form bell mouth shape, after cooling stick was installed, the gap between cooling stick and the body of heater was big, the gap adopts the grouting filling to cause can not be full, poor thermal conductivity, cooling effect is inhomogeneous, thereby influences the whole type of furnace, reduce the usage factor of stove, increased the production consuming cost.

The content of utility model:

The purpose of this utility model is the deficiency at existing oxygen hole burning technology, design simple in structure, easy to manufacture, easy to operate, at the perforate of the cooling wall breakage of blast furnace furnace wall machinery, perforate efficient height, a kind of drill bit of superior in quality usefulness.

The technical solution of the utility model is achieved in that

The technical solution of the utility model, it comprises bores tooth 4, and described brill tooth 4 is connected with an end of cylindrical shell 3, and the other end of cylindrical shell 3 is connected with end cap 2, and the other end of end cap 2 is connected with connecting filament head 1.

The brill number of teeth of above-mentioned brill tooth 4 is at least 3.

The brill number of teeth of above-mentioned brill tooth 4 is generally 3～8.

The connected mode of above-mentioned brill tooth 4 and an end of cylindrical shell 3: be described cylindrical shell 3 with bore the end fluting that tooth 4 is connected, this groove number is identical with the brill number of teeth of boring tooth 4, flute profile and size are complementary with the end shape and the size of the link of brill tooth 4.

The brill odontoid of above-mentioned brill tooth 4 is trapezoidal helical teeth, trapezoidal flat tooth, a kind of in pointed tooth, recessed tooth, the arc tooth etc.

The equal full weld welding in junction between each parts of above-mentioned a kind of drill bit.

The advantage of the technical solution of the utility model is to overcome fully the deficiency of existing oxygen hole burning, and this drill bit structure is simple, and is easy to operate.Use the perforate of this drill bit machinery, perforate efficient height becomes hole circle and rule, and hole wall is bright and clean, and is little with the hole wall gap behind the installation cooling stick, and the grouting back is full enriches, and does not have potential safety hazard in the construction, energy savings, raising output.Be example with 380 cubic metres of blast furnaces specifically, this bit bore is compared with the oxygen hole burning, and every year can voluminous molten iron about 10,000 tons as calculated, saves coking coal and takes about 3,000,000 yuan.

Description of drawings:

Fig. 1 is a parts combined drill structural representation of the present utility model.

Fig. 2 is a connecting filament header structure schematic diagram of the present utility model.

Fig. 3 is an end cover structure schematic diagram of the present utility model.

Fig. 4 is a tube structure schematic diagram of the present utility model.

Fig. 5 is a trapezoidal helical teeth structural representation of the present utility model.

Fig. 6 is a trapezoidal flat toothing schematic diagram of the present utility model.

Fig. 7 is a pointed tooth structural representation of the present utility model.

Fig. 8 is a recessed toothing schematic diagram of the present utility model.

Fig. 9 is an arc toothing schematic diagram of the present utility model.

The specific embodiment:

Come goal of the invention of the present utility model is described further below in conjunction with accompanying drawing and by specific embodiment.

Embodiment 1:

At first, make parts respectively, connecting filament head 1, end cap 2, cylindrical shell 3, brill tooth 4, brill tooth 4 are carbide alloy.

One end of connecting filament head 4 is an internal thread, be used for being connected with rig, the centre bore internal diameter coupling full weld of other end external diameter and end cap 2 is welded to connect, the outer radius of connecting filament head 1 has the spanner position, so that spanner loading and unloading drill bit, connecting filament head 1 is a steel part, secondly, cylindrical shell 3 and the end cap that assembly welding is good are welded to connect along the circumference full weld, form drill bushing integral body, open 6 grooves at the other end of cylindrical shell 3, flute profile is complementary with the end end shape and the size that are connected of drill bit 4 with size, and the groove number is identical with the number of teeth of boring tooth 4, and is last, bore the tooth full weld with 6 and be welded in 6 grooves of cylindrical shell 3, make drill bit.

Embodiment 2:

As required, the number of an end of cylindrical shell 3 fluting can be 3～8, bores the shape of tooth 4 and can select among Fig. 5～9 figure any.Make the drill bit of a series of different sizes, other fabrication schedule is identical with embodiment 1 with technology.

The specific operation process that adopts this drill bit to carry out opening shell of blast furnace is: with on the connecting filament head of drill bit on the main shaft of rig, rig rotates and drives the drill bit rotation, the feed of operation rig, the first-selected cutting of drill bit furnace wall steel plate, bit change cuts boring to the cooling wall that damages again, drill cooling wall, change the slag iron layer that longer drill bit will adhere to again and drill, take off drill bit, boring is promptly finished.Speed of fulfiling hole is quick, and is superior in quality, improves furnace output, energy savings.

Claims

1, a kind of drill bit, it comprises bores tooth (4), it is characterized in that described brill tooth (4) is connected with an end of cylindrical shell (3), and the another kind of cylindrical shell (3) is connected with an end of end cap (2), and the other end of end cap (2) is connected with connecting filament head (1).

2, a kind of drill bit according to claim 1 is characterized in that the brill number of teeth order of described brill tooth (4) is at least 3.

3, a kind of drill bit according to claim 1, the brill number of teeth that it is characterized in that described brill tooth (4) is 3～8.

4, according to claim 1 or 2 or 3 described a kind of drill bits, the end fluting that is connected with brill tooth (4) that it is characterized in that described cylindrical shell (3), this groove number is identical with the brill number of teeth of boring tooth (4), and flute profile and size are complementary with the end shape and the size of the link that bores tooth (4).

5, a kind of drill bit according to claim 1, the brill odontoid that it is characterized in that described brill tooth (4) is trapezoidal helical teeth, trapezoidal flat tooth, a kind of in pointed tooth, recessed tooth, the arc tooth etc.

6, a kind of drill bit according to claim 1 is characterized in that the equal full weld welding in junction between described each parts.