CN2172291Y

CN2172291Y - Tapping hole opening drill for iron smelting furnace

Info

Publication number: CN2172291Y
Application number: CN 93224046
Authority: CN
Inventors: 林世平
Original assignee: LUOTIAN CAST STEEL PLANT HUBEI
Current assignee: LUOTIAN CAST STEEL PLANT HUBEI
Priority date: 1993-09-11
Filing date: 1993-09-11
Publication date: 1994-07-20
Anticipated expiration: 2003-09-11

Abstract

The utility model discloses a tap hole opening drill for iron smelting furnaces, composed of a drill body (1) and more than two carbide blades (2) which are inlaid on the head (4) of the drill body. The drill body arranged between each two contiguous blades is provided with a chip removing slot (6), the center of the drill body is provided with an air inlet hole (5) which penetrates the whole body, and a connection part (3) at the tail end of the drill body is provided with connecting threads. Under particular case, the utility model is additionally provided with a connecting sleeve to be connected to a drill rod for use in transforming and compounding. With favorable blade strength, favorable compatibility and long service life, the drill is smooth is removing chip.

Description

Tapping hole opening drill for iron smelting furnace

The utility model relates to the bit tool that iron-smelting blast furnace iron notch opening is used.

Iron-smelting blast furnace goes out the method for molten iron opening and is for a long time: tap a blast furnace by drill rod repeated stock blast furnace iron notch opening more than 4 meters of human.This hatch method labour intensity is big, dangerous.Germany, Japan, Luxembourg have made a kind of taphole drilling in recent years, open the iron-smelting furnace iron notch with this drill bit, and is time saving and energy saving, safer.This drill bit is a kind of mach interalloy tool steel of forging of cooling air inlet hole drill bit that is provided with, and is provided with to move back ash and move back the bits duct, takes impact type advance to bore during use, and the ash bits withdraw from from the slit of bit face.The shortcoming of this drill bit is; The ash bits withdraw from not smooth; Drill bit material red hardness is poor, does not reach the requirement that iron-smelting blast furnace uses, when drill bit pierces the body of heater certain depth, because the hardness of the temperatures involved drill bit blade of blast furnace has lost work effectiveness; The connection portion of drill bit is a special screw thread, and interchangeability is poor, also will change drilling rod when often changing the opening specification, and is so very inconvenient.

The design the purpose of this utility model is the shortcoming that will overcome above-mentioned drill bit, provides that a kind of ash discharge bits are smooth, blade face intensity is good, the iron-smelting blast furnace iron notch start bit of being convenient to exchange.

To achieve these goals, this iron-smelting blast furnace iron notch start bit is a kind of two-phase built-up type drill bit, form by drill main body and cutting tip, drill main body is the integral body that the head of a connection portion that general connecting thread arranged and expansion constitutes, there is an intake opening that runs through entire body at the drill main body center, and the drill main body head is uniform is inlaying 2 or 3,4 or more a plurality of Wimet steel blade, have the axial pass trough of ash discharge bits on main body between per 2 adjacent blades.

This drill bit is divided into two sword formulas according to embedded knife number, three sword formulas, and four sword formulas etc. are all kinds of.

The utility model drill bit, because move back grey junk slot, the ash discharge bits are unobstructed, can advance to bore continuously, need not take repercussion to advance to bore; The blade Wimet system that is inlaid into, resistance to elevated temperatures is good, and the deliquescing of can at high temperature not annealing is renderd a service high; Drill main body afterbody connecting thread is general internal thread or outside screw, is convenient to change drilling rod.

Concrete structure of the present utility model is provided by following example and accompanying drawing.

Fig. 1,2 is respectively that the master according to the iron-smelting blast furnace iron notch start bit that two sword sheets are arranged that the utility model proposes looks diagrammatic sketch, overlooks diagrammatic sketch.

Fig. 3 is the diagrammatic sketch of overlooking according to the iron-smelting blast furnace iron notch start bit that three blades are arranged that the utility model proposes.

Further specify structure of the present utility model below in conjunction with accompanying drawing.

This iron-smelting blast furnace iron notch start bit, comprise a high temperature steel drill main body 1, on the afterbody junction 3 of drill main body 1, have to connect and use screw thread, uniformly on drill main body head 4 inlaying 2 or 3 Wimet steel blades 2, have the intake opening 5 that runs through entire body in the centre of drill main body 1, this hole is done into, and cooling air cools off drill bit and blows ash and use, at the groove 6 that has 1 ash discharge bits on the body head 4 between per 2 adjacent blades, when drill bit rotates, blade is cut the ash bits that get off and is moved to the drill bit afterbody from the head along groove 6, discharges from afterbody.

Under specific circumstances, for the convenience of conversion allotment jointed rod, can increase an adapter sleeve at drill bit jointed rod place.

This drill bit result of use is good, and the life-span is long, and interchangeability is good.

Claims

1, a kind of iron-smelting blast furnace iron notch start bit, it be one by drill main body (1) be fixed on the two-phase combined drill that the blade (2) on its head (4) is formed, there is the intake opening (5) that runs through entire body at the center of drill main body (1), located connecting thread in afterbody connection portion (3), the head (4) that it is characterized in that drill main body (1) is gone up and uniformly to be inlayed 2 with cutter (2), and chip discharging groove (6) is vertically arranged on the drill main bodies in the middle of every adjacent 2 blades.

2, drill bit as claimed in claim 1 is characterized in that blade (2) is the Wimet steel blade.

3, drill bit as claimed in claim 1 is characterized in that the screw thread that the connection portion (3) of drill main body (1) is located is general internal thread or outside screw.