CN2823527Y

CN2823527Y - Combined mine drill bit

Info

Publication number: CN2823527Y
Application number: CN 200520041107
Authority: CN
Inventors: 董梅叶
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-04-20
Filing date: 2005-04-20
Publication date: 2006-10-04
Anticipated expiration: 2015-04-20

Abstract

The utility model discloses the manufacturing technique of a drill bit of a mining drill, particularly a combined mine drill bit which can cause a whole drill bit to be divided into two parts which are a drill bit body and an extension rod, wherein the tip part of the drill bit body is embedded with tungsten steel which is used as a drill cutting edge, and the cross section of the inner wall of the drill bit body is in a right hexagon; the external shape of the extension rod is in a right hexagonal prism, both ends of the extension rod are respectively sheathed with the drill bit body and the inner hexagon of a drill rod, an inner cavity of the extension rod is in a hollow cylinder and the extension rod and a through hole on the drill bit body can form a channel for vacuum cleaning and the circulation of compressed air and cooling liquid after the extension rod is sheathed in the drill bit body. Because the combined mine drill bit is divided into two sections, when the drill bit is worn, only the drill bit body needs to be replaced, and the extension rod part can be continuously used, which can show the advantages of steel saving and cost reduction of the utility model obviously. Because the inner hexagon is used for sheathing joint, the utility model has bigger drill thrust than that of the mode of cone sheathing joint, can prevent the occurrence of the phenomenon that the drill bit is clamped by rock and is the ideal updated drill bit for mine drills.

Description

A kind of combined type mine drill bit

Technical field

The utility model relates to the drill bit manufacturing technology field of the rig of digging up mine, and especially refers to a kind of combined type mine drill bit.

Background technology

Drill bit on the rig that the mining rock drilling is used has a common characteristic, be exactly drill body be to make of high-quality tool steel, the cutting edge of point generally all welds carbide alloy such as wolfram steel, but also require in the middle of drill bit and the drilling rod is hollow, so that water flowing cooling, logical compressed air vibration or vacuum cleaning.Owing to spud in to hard rock, the cutting moment of torque is quite big, so the mine drill bit is easy to wearing and tearing and scraps.A whole in fact drill bit is scrapped not only very uneconomical, and is the significant wastage of resource.So someone has designed a kind of socket joint type drill bit, exactly drill bit is divided into drill body and extension bar two parts, need only scrap body during bit wear, and extension bar part can continue still to use, this to save steel, reducing cost all is beneficial to.But this class drill bit is still continued to use old-fashioned conical sleeve with the method for attachment of drilling rod and is connected, and this is for more bit change is convenient certainly.But taper extension bar and drilling rod socket, its defective are very easily to skid to take off and drill bit is blocked by rock mass when the frictional force between drill bit and rock mass is big.A kind of combined type mine drill bit of the applicant's design has overcome above-mentioned defective.

The utility model content

Technical problem to be solved in the utility model is: reform the form of existing taper extension bar socket, a kind of combined type mine drill bit that can not skid and take off is provided.

The technical scheme of the utility model technical solution problem is: with the body and the extension bar of former socket joint type drill bit, the taper socket between extension bar and the drilling rod makes six prismatic and interior hexagonal sockets into, makes it become the mine drill bit that never skids and take off.

This combined type mine drill bit is divided into drill body and six prismatic extension bar two parts.Described body is a cylindrical shape, and point is tapered polyhedral drilling cutting edge, and there is a groove centre, is used for embedding welding wolfram steel; The inner chamber cross section of body is interior hexagonal, and the centre position is arranged with two through holes on the outer wall, and the lower end also is provided with a locating hole.The main body of described extension bar is positive six prisms, and inner chamber is the gas-liquid channel of hollow circle tube.It is orthohexagonal protuberance that the outer wall interposition installs a cross section, make extension bar formation can insert the linkage section of body and socket section two parts of insertion drilling rod, its middle connecting segment is shorter, the socket section is long slightly, be provided with the pellet shot from a slingshot jump ring that steel ball and reed are formed on linkage section, elastic force was enough to make drill bit and extension bar can not break away from automatically when it opened.

The utility model partly is divided into two sections manufacturings to drill body part easy to wear with the extension bar that can not wear and tear, and need only change drill body behind the bit wear, and extension bar still can continue to use, and it saves steel is conspicuous with the advantage that reduces cost.Simultaneously because the socket between drill bit and extension bar, extension bar and drilling rod makes interior hexagonal into by existing taper shape, when having stopped to increase drill bit and drilling rod are skidded and take off the phenomenon generation that causes that drill bit is blocked because of frictional force between drill bit and rock mass.The utility model is the desirable supporting drill bit of mine rig, hexagonal in just existing drilling rod link must being made into by cone-shaped inner hole before adapted.

Description of drawings

Fig. 1 is a three-dimensional exploded view of the present utility model;

Fig. 2 is partly main (broken section) figure that looks of the drill body of this utility model;

Each several part title and mark among the figure: 1. body, 2. cutting edge, 3. through hole, 4. locating hole, 5. in hexagonal, 6. extension bar, 7. protuberance, 8. pellet shot from a slingshot jump ring, 9. annulus jump ring, 10. gas-liquid channel.

The specific embodiment

As depicted in figs. 1 and 2, the utility model is divided into body 1 and extension bar 6 two parts.Drill body 1 is connected with drilling rod on the rig by extension bar 6.Described body 1 is the cylinder of a heavy wall substantially, the tapered polyhedron of its tip portion, and the centre of end face has groove, embeds the cutting edge 2 that has welded a wolfram steel do cutting usefulness.The mid portion symmetry of body 1 outer wall is offered two through holes 3, as drill bit cooling fluid, compressed air outlet port or vacuum cleaning mouth when spudding in.Hexagon in the cross section of inboard wall of body 1 just becomes matches with the outer-hexagonal of extension bar 6.The basic configuration of described extension bar 6 is a positive hexagonal prism, and inside is hollow circle tube, as the gas-liquid channel 10 of cooling fluid, compressed air or vacuum cleaning.The outer wall centre is provided with a cross section for one section and also is orthohexagonal protuberance 7, and its circumscribed circle diameter is consistent with the diameter of drill body 1 and drilling rod.If the purpose of this protuberance 7 is that drill body 1 and drilling rod are separated, and make the effect of drill bit lengthening.Also be provided with the pellet shot from a slingshot jump ring 8 of a location usefulness in addition in the linkage section end that is connected an end with drill body 1, this pellet shot from a slingshot jump ring 8 is made up of reed and steel ball.After extension bar 6 inserted drill bodies 1, the reed on the pellet shot from a slingshot jump ring 8 was upspring steel ball in the locating hole 4 that enters body 1, makes drill body 1 and extension bar 6 sockets firm.Extension bar 6 is connected an end and is provided with an annulus jump ring 9 with drilling rod, when extension bar 6 inserts, the opening closure of annulus jump ring 9, be inserted into the position after because the tension force effect of annulus jump ring 9 can not fallen down combined drill from drilling rod.When changing drill body 1, if with the steel ball of pellet shot from a slingshot jump ring 8 by advancing, take off after just drill body 1 being extracted, very convenient.

Claims

1. combined type mine drill bit, combine by drill body (1) and extension bar (6) two parts, it is characterized in that body (1) cross section of inboard wall becomes regular hexagon, the profile of extension bar (6) is positive six prisms, inner chamber is the gas-liquid channel (10) of hollow circle tube, and extension bar (6) inserts in the body (1) promptly becomes the combined type drill bit.

2. a kind of combined type as claimed in claim 1 mine drill bit, the profile that it is characterized in that described drill body (1) is thick cyclinder shape, point is taper and is polyhedron-shaped, the centre has a groove, embed and weld wolfram steel and make cutting edge (2), symmetry has two through holes (3) in the middle of the outer wall, and body (1) lower end also is provided with a locating hole (4).

3. a kind of combined type as claimed in claim 1 mine drill bit, it is characterized in that described extension bar (6) two ends are respectively the socket section two parts that can insert the linkage section of body (1) and insert drilling rod, there is a protuberance (7) to connect between two sections, on linkage section, is provided with the pellet shot from a slingshot jump ring (8) that steel ball and reed are formed.