CN212404139U

CN212404139U - Mud sleeve drill bit

Info

Publication number: CN212404139U
Application number: CN202021182712.7U
Authority: CN
Inventors: 程川; 岳彩东; 黄昌荣; 高从彪
Original assignee: Panzhihua Zhanfeng Technology Co ltd
Current assignee: Panzhihua Zhanfeng Technology Co ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2021-01-26
Anticipated expiration: 2030-06-23

Abstract

The utility model relates to a mud cover drill bit belongs to drilling equipment technical field. The tool apron comprises a connecting body (1) and tool apron bodies (3), wherein the tool apron bodies (3) are arranged at intervals along the circumferential direction of the outer edge of the connecting body (1); blade holder (3) are right trapezoid structure, and direct waist is connected with connecting body (1) lateral wall, are provided with mounting groove (31) on the terminal surface at the last end place of blade holder (3), are equipped with drill bit blade (2) in mounting groove (31), and drill bit blade (2) are the spiral emission column structure. The structure arranges the drill bit blade (2) in a spiral emission structure, which is convenient for discharging residues generated by reaming the taphole; establish blade holder (3) into right trapezoid simultaneously, install drill bit blade (2) at blade holder (3) upper base place terminal surface, can guarantee the big gun head shape adaptation of taphole and hydraulic pressure big gun after the reaming, avoid running mud. The problem of current mud cover inner wall can not closely laminate with the big gun head, cause the big gun mud of shutoff tap hole to lose, can not seal the tap hole, influence actual production is solved.

Description

Mud sleeve drill bit

Technical Field

The utility model relates to a mud cover drill bit belongs to drilling equipment technical field.

Background

The tapping machine is an important machine for opening a taphole during tapping of a blast furnace, and is essentially a long-rod electric drill which is hung by a cantilever and can rotate, advance and retreat. The opening machine is directly used for opening an iron notch, and after molten iron is discharged, the stemming sleeve needs to be plugged through stemming. The hydraulic gun is mainly used for repairing the taphole mud sleeve, the shapes of the mud sleeve and the taphole plugging hydraulic gun head are required to be consistent in the actual production process, as iron slag in the blast furnace flows out through a taphole pore channel (the center of the mud sleeve), the gun is used for plugging after the completion, the taphole mud is shot into the furnace cylinder, once the mud sleeve and the gun head cannot be in tight contact, the taphole can run mud during plugging, namely, a part of the taphole mud which should enter the furnace runs off, the taphole cannot be plugged in serious conditions, the blast furnace is forced to reduce the air, and the economic and technical indexes of the blast furnace are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that current mud cover inner wall can not closely laminate with the big gun head, causes the stemming of shutoff tap hole to lose, seals the tap hole not, influences actual production.

The utility model provides a technical scheme that its technical problem adopted is: the mud sleeve drill bit comprises a tubular connecting body and a plurality of tool apron, wherein the tool apron is arranged at intervals along the circumferential direction of the outer edge of the connecting body; the blade holder is right trapezoid structure, and the direct waist of blade holder is connected with the connecting body lateral wall, is provided with the mounting groove on the terminal surface at the bottom of blade holder 3's the place, is provided with the drill bit blade in the mounting groove, and the drill bit blade is the spiral transmission column structure.

Wherein, in the structure, the tool apron is obliquely arranged, and the included angle between the right-angle waist of the tool apron and the axis of the connecting body is 8-9 degrees, so that all the tool aprons are arranged in a spiral emission shape.

Wherein, in the structure, the mounting groove and the connecting body are arranged at an included angle of 8-9 degrees in the length direction of the upper bottom.

The structure further comprises a connecting plate, one end of the connecting plate is connected with one cutter holder side wall, and the other end of the connecting plate is connected with the adjacent cutter holder side wall.

The outer side end face of the drill bit blade in the structure is a blade face, and the blade face is of a circular arc structure.

Further, in the structure, the blade surface is in the shape of a circular arc with the radius equal to 100 mm.

Wherein, the number of the tool holders in the structure is 3 to 6.

Further, the number of the tool holders in the structure is 4.

Wherein, be provided with connecting thread on the lateral wall that connects the body and keep away from drill bit blade end among the above-mentioned structure.

The utility model has the advantages that: the structure arranges the drill bit blades in a spiral emission structure, so as to be convenient for discharging iron slag or mud sleeve slag at the iron outlet; meanwhile, the cutter holder is arranged to be of a right-angle trapezoidal structure, and the drill bit blade is arranged on the end face of the upper bottom of the cutter holder, so that the shape of the taphole after hole expansion is matched with that of the gun head of the hydraulic gun, and mud leakage is avoided. Meanwhile, the structure can be arranged on the tapping machine after the tap hole runs the mud, and the tapping machine can be tapped after the tap hole mud sleeve rotates for several times by aiming at the tap hole mud sleeve, so that the practical use is more convenient.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the present invention, with the drill tip removed, of FIG. 1;

FIG. 3 is a schematic front view of the structure of FIG. 1 according to the present invention;

FIG. 4 is a schematic view of the present invention with the drill tip removed from FIG. 3;

FIG. 5 is a schematic view of the structure of the knife holder of the present invention;

FIG. 6 is a schematic view of the structure of the drill bit blade of the present invention;

fig. 7 is a schematic view of the cross-sectional structure of the drill bit blade of the present invention.

Labeled as: 1 is the connecting body, 2 is the drill bit blade, 21 is the cutting edge face, 3 is the blade holder, 31 is the mounting groove, 4 is the connecting plate.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 to 7, the mud sleeve drill bit of the present invention comprises a tubular connecting body 1 and a plurality of tool holders 3, wherein the tool holders 3 are circumferentially spaced along the outer edge of the connecting body 1; the blade holder 3 is a right trapezoid structure, the direct waist of the blade holder 3 is connected with the outer side wall of the connecting body 1, the end face of the upper bottom of the blade holder 3 is provided with a mounting groove 31, a drill bit blade 2 is arranged in the mounting groove 31, and the drill bit blade 2 is of a spiral emission structure. As can be understood by those skilled in the art, the number of the tool holders 3 is plural, and the tool holders are arranged at intervals along the circumferential direction of the connecting body 1 and connected with the outer wall of the connecting body 1, and for the convenience of welding and fixing, the cross section of the connecting body 1 is preferably a circular ring structure, that is, a circular tube structure. In order to reduce the manufacturing cost, a welding process, that is, welding and fixing the connecting body 1 and the tool holder 3, may be preferably adopted. The optimized tool apron 3 is of a right-angled trapezoid structure, so that the tool apron can be attached to the size of the gun head of the hydraulic gun after drilling, and mud leakage is avoided. Meanwhile, the drill bit blade 2 is guaranteed to be of a spiral emission structure, and the service life of the structure is prolonged mainly for deslagging. The accessible has the contained angle with the orthographic projection of mounting groove 31 and the terminal surface at the last end place of blade holder 3, and this kind of setting can guarantee that drill bit blade 2 installed in mounting groove 31 is spiral transmission column structure for drill bit blade 2 forms the fluted drill structure, is the heliciform cavity between drill bit blade 2, and the quick spiral of iron fillings that the drilling of being convenient for produced discharges, avoids piling up in drill bit department, and the heat dissipation all causes the drill bit to damage.

Preferably, in the structure, the tool apron 3 is obliquely arranged, and the included angle between the right-angled waist of the tool apron 3 and the axis of the connecting body 1 is 8-9 degrees, so that all the tool aprons 3 are arranged in a spiral emission shape. As will be understood by those skilled in the art, in order to further increase the discharge speed of the iron pieces generated by drilling, the present structure further preferably has the tool holders 3 arranged obliquely such that all the tool holders 3 are arranged in a spiral-emitter shape. And only need guarantee that blade holder 3 slope setting can guarantee that mounting groove 31 slope setting can guarantee that final drill bit blade 2 is arranged for the spiral emission form this moment. The included angle between the right-angled waist of the tool apron 3 and the axis of the connecting body 1 is further preferably 8-9 degrees.

Preferably, in the structure, the included angle between the mounting groove 31 and the length direction of the upper bottom of the connecting body 1 is 8-9 degrees. The technical personnel in the field can understand that this structure is only preferred mounting groove 31 and is 8 ~ 9 with the contained angle of connecting body 1 upper base length direction, and the reacing of above-mentioned data is practiced through a lot of by the inventor, so under the circumstances of guaranteeing iron fillings to discharge smoothly, make the drilling blade be the spiral entering with the contact point of iron notch, reduced the impact of drilling blade, make the drilling blade conveniently get into the iron notch to a certain extent, can reduce the wearing and tearing of drilling blade simultaneously.

Preferably, the structure further comprises a connecting plate 4, one end of the connecting plate 4 is connected with the side wall of one cutter holder 3, and the other end of the connecting plate 4 is connected with the side wall of the adjacent cutter holder 3. The technical personnel in the field can understand that, because the moment of torsion is great when in actual use, in order to avoid blade holder 3 damage when using, so this structure is preferred to be connected between two adjacent blade holders 3 through connecting plate 4, and this connecting plate 4's function is the gusset, makes connecting plate 4 link connecting body 1 and blade holder 3 integratively, and the junction is consolidated through connecting plate 4, avoids the easy desoldering of the welding seam of junction, influences the life-span.

Preferably, in the above structure, the outer end surface of the drill tip 2 is the cutting edge surface 21, and the cutting edge surface 21 has an arc-shaped configuration. It will be understood by those skilled in the art that the blade face 21 of the drill tip 2 is preferably in a circular arc shape in combination with the inclined disposition of the mounting groove 31, so that the entire drill tip 2 is spirally radially disposed, thereby reducing the wear of the drill tip 2.

Preferably, in the above structure, the cutting edge surface 21 is in the shape of a circular arc with a radius equal to 100 mm. It will be appreciated by those skilled in the art that the present configuration preferably provides the cutting edge face 21 as an arc of a circle having a radius equal to 100mm, further reducing wear of the drill tip 2 during drilling.

Preferably, the number of the tool holders 3 in the above structure is 3 to 6. As will be appreciated by those skilled in the art, in order to achieve rapid opening of the tap hole, the present device preferably has 3 to 6 tool holders 3, i.e. 3 to 6 drill inserts 2, increasing the contact point of the drill inserts 2 with the tap hole.

Preferably, the number of the tool holders 3 in the above structure is 4. It will be appreciated by those skilled in the art that the present construction further prefers that the number of the cartridges 3 is 4.

Preferably, the outer side wall of the end of the connecting body 1 far away from the drill bit 2 is provided with a connecting thread. It will be appreciated by those skilled in the art that in order to facilitate connection with a drill rod, the result is preferably that the connection body 1 is provided with a connection thread on its outer side wall remote from the end of the drill tip 2, so that the present arrangement can be directly screwed with a drill rod.

Claims

1. Mud cover drill bit, its characterized in that: the tool apron comprises a tubular connecting body (1) and a plurality of tool apron bodies (3), wherein the tool apron bodies (3) are arranged at intervals along the circumferential direction of the outer edge of the connecting body (1); the tool apron (3) is of a right-angle trapezoid structure, the direct waist of the tool apron (3) is connected with the outer side wall of the connecting body (1), the end face of the upper bottom of the tool apron (3) is provided with a mounting groove (31), a drill bit blade (2) is arranged in the mounting groove (31), and the drill bit blade (2) is of a spiral emission structure.

2. The mud jacket drill bit as defined in claim 1, wherein: the tool apron (3) is obliquely arranged, and the included angle between the right-angled waist of the tool apron (3) and the axis of the connecting body (1) is 8-9 degrees, so that all the tool apron (3) are arranged in a spiral emission shape.

3. The mud jacket drill bit as defined in claim 1, wherein: the mounting groove (31) and the upper bottom length direction of the connecting body (1) form an included angle of 8-9 degrees.

4. A mud jacket drill bit according to any one of claims 1 to 3, wherein: the tool apron is characterized by further comprising a connecting plate (4), one end of the connecting plate (4) is connected with the side wall of one tool apron (3), and the other end of the connecting plate is connected with the side wall of the adjacent tool apron (3).

5. The mud jacket drill bit as defined in claim 1, wherein: the outer side end face of the drill bit blade (2) is a blade face (21), and the blade face (21) is of a circular arc structure.

6. The mud jacket drill bit as defined in claim 5, wherein: the blade surface (21) is in the shape of a circular arc with the radius equal to 100 mm.

7. The mud jacket drill bit as defined in claim 1, wherein: the number of the tool holders (3) is 3-6.

8. The mud jacket drill bit as defined in claim 7, wherein: the number of the tool holders (3) is 4.

9. The mud jacket drill bit as defined in claim 1, wherein: the outer side wall of the end, far away from the drill bit blade (2), of the connecting body (1) is provided with connecting threads.