CN2238314Y

CN2238314Y - Long-life coal drill rod

Info

Publication number: CN2238314Y
Application number: CN 95201056
Authority: CN
Inventors: 乔莺迁
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-01-15
Filing date: 1995-01-15
Publication date: 1996-10-23
Anticipated expiration: 2005-01-15

Abstract

The utility model relates to a long-life coal drill pipe, comprising a connecting body, a coupling band and a spiral drill pipe. The spiral drill pipe is connected with a slewing drilling machine by the connecting body. The shapes of both ends of the spiral drill pipe are the same. When one end of the spiral drill pipe is worn-out, the other end can be changed to use. Therefore, the service life of the spiral drill pipe is extended about twice. The utility model is suitable for the factories producing the slewing drilling machines.

Description

Durable coal borer bar

The utility model relates to one of the drilling tool of colliery usefulness swinging auger coal borer bar.

Current, in the industry of colliery, the driving technology of preparatory working and development work mainly is based upon and adopts on the drilling and blasting method driving basis, thereby drilling machine coal borer bar consumption is very big, though original coal borer bar has its advantage, but also has intrinsic shortcoming; Figure 1 shows that the schematic diagram of original coal borer bar, this drilling rod is by the bar tail staight shank part (1) of pressing dress in rig, and chip removal spiral part (2) uses the club head portion (3) of notch, endoporus and pin-and-hole to form by the dress drill bit.Coal borer bar first half is long owing to the contact mineral time, thereby wearing and tearing are very fast, being easy to wearing part general only is about 1/2 of whole run of steel, after the wearing and tearing of drilling rod first half, just bad chip removal outward, influence normal bore operation, although at this moment the latter half of drilling rod is also very intact, this root drilling rod also will be scrapped, and causes very big waste like this, once the someone repaired the old and utilized scraps, want the drilling rod reparation use of experience wear, but also be to truncate before the saw, process staight shank and groove endoporus and pin-and-hole again, do not say with short that with long only two processes just very uneconomical again.

The utility model purpose provides a kind of coal borer bar that has improved, and when current half part was worn and torn bad uses, driller just can use the tune of coal borer bar under simple operations, thus application life of raising coal borer bar nearly one times.

Technical solution of the present utility model is: this durable coal borer bar comprises connector, coupling band, auger stem.Auger stem two ends shape is the same, and notch, endoporus and the pin-and-hole used by the dress drill bit are all arranged.

Advance one below in conjunction with accompanying drawing and describe the utility model in detail:

Fig. 2 is durable coal borer bar schematic diagram.

Wherein: 1, connector, 2, coupling band, 3, auger stem

As shown in the figure: connector (1) one end is the same with the bar tail shape of raw coal drilling rod, have toward turning round in the rig by the staight shank part of adorning usefulness, the other end then bit shank shape with detachable bit is the same, flat side and little garden handle are arranged, flat side is installed in the notch of auger stem (3) termination, transfer torque is used, little garden handle then inserts in the endoporus of auger stem, make connector and auger stem concentric, coupling band (2) then is sleeved on connector (1) and auger stem (3) and the outer garden, and with bolton on both, make its arbitrarily play, guaranteed the concentricity of connector and auger stem more, detachable bit is installed in the auger stem other end (not marking among the figure) and has formed a complete revolution drilling machine, and it is turned round on the auger by being loaded on, then can carry out the drilling operation, if during the bad chip removal of one of screw rod wearing and tearing, then can reverse end for end to use, up to whole auger stem wearing and tearing for extremely.

The utility model compared with the prior art its advantage is:

Although the utility model has increased connector, two parts of coupling band, But these two parts are not consumable accessorys, and cost is also few; Auger Although the bar two ends equally process notch, endoporus and pin by the dress detachable bit The hole, but cancelled original bar tail staight shank manufacturing procedure partly, in man-hour On what do not add, but can reverse end for end to use, the coal borer bar is carried service life Gao Jinyi doubly reaches the purpose of making the best use of everything.

Claims

A kind of new durable coal borer bar comprises connector, coupling band, auger stem, and feature of the present utility model is that connector connects with rig and auger stem, and auger stem two head shapes are the same, and notch, endoporus and pin-and-hole are all arranged.