CN2346926Y

CN2346926Y - Bull rod tenon wedge driving joint of down-the-hole drill

Info

Publication number: CN2346926Y
Application number: CN 98221109
Authority: CN
Inventors: 张涛
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-03-04
Filing date: 1998-03-04
Publication date: 1999-11-03
Anticipated expiration: 2008-03-04

Abstract

The utility model relates to a late-model bull rod tenon wedge driving joint of down-the-hole drill, which overcomes the defect that a whole plug is discarded after the lug boss of the traditional joint of a lug boss type is milled, and the bull rod tenon wedge driving joint of down-the-hole drill is characterized in that the transfer torque of the lug boss is replaced by a wedge block. The wedge block is a hexahedron with the cross section of a isosceles trapezoid, and the big end of the wedge block is cut off a chamfering; the small end of the wedge block can be inserted into the taper groove the end pipe of a plug; an inclined plane formed by the chamfering of the big end is inosculated with the front inclined plane of a hidden groove which is arranged on the inner wall of a socket, and the torque can be transferred; a taper end can be firmly connected with the taper hole of the plug by the oppression of the wedge block. The utility model has the advantages of novel design, anti-attrition, anti-impact and convenient replacement and dismounting.

Description

Hidden hole drilling drilling rod tenon wedge drive joint

The utility model relates to a kind of mining machinery ore deposit rock rig.

The hidden hole drilling tool joint is made up of plug and socket.Old-fashioned plug head is that the tubular type part, the socket that have pair of projections are the hollow cylinder that is processed with translot on the inner hole wall.2 joint drilling rods whens butt joint, the plug pipe is inserted in the endoporus of socket and turn clockwise a little, then the boss on the plug just is stuck in the translot on the socket inner hole wall, and with this transfer torque.Because the boss on the plug is difficult for processing, and can't repair after the wearing and tearing, make that plug is disposable to be scrapped, unfortunately tangible.

The purpose of this utility model is: a kind of hidden hole drilling drilling rod tenon wedge drive joint is provided.Modular plug with replaceable voussoir replaces disposable projective table type plug, finishes the transfer torque task, and plug body can reuse.

The purpose of this utility model be achieved in that at first design and make voussoir (it be a cross section be isosceles trapezoid and to go to an oblique angle, longitudinal section at big end be seven solid parts of rectangle), (lug boss position originally) processes two grooved taper holes vertically on the plug pipe again, compress with knocking in the voussoir patchhole that (chamfering on the voussoir should be on the exposed parts that protrudes, and in drilling rod rotation direction the place ahead), just formed tenon wedge combined plug.The bearing surface of socket translot front end also is processed into the inclined-plane, and identical with voussoir chamfering slope.In the endoporus with this plug insertion socket, and turn clockwise a little, the inclined-plane at two places is matched.The combination of such one group of member is a tenon wedge drive joint of the present utility model.

Owing to adopt such scheme, during drilling rod work, the tapering end of voussoir and plug taper hole compressed by the tangential force transfer torque on the voussoir inclined-plane, normal reaction.The inclined-plane has increased contact area, thereby has strengthened the wear-resistant impact resistance that undermines.The voussoir wear out failure promptly more renews part, and this bell and spigot joint still can work on.Thereby realized the purpose of this utility model.

Below in conjunction with drawings and Examples the utility model is further specified;

Fig. 1 is the pipe part that old-fashioned plug head has pair of projections

Fig. 2 is the sectional drawing of position shown in the A-A among Fig. 1.

Fig. 3 is the assembling drawing of the utility model tenon wedge drive joint.1. plugs, 2. voussoirs, 3. sockets, 4. drilling rod steel pipes among the figure

Fig. 4 is the sectional drawing of position shown in the B-B among Fig. 3.

Fig. 5 is the axial full sectional view of socket among Fig. 3 (3).

In Fig. 3, plug (1) front end appropriate location processes tapering grooved hole vertically, and after inserted wedge (2) compresses, and inserts in the translot of socket (3) and is rotated in place, and has just constituted the utility model hidden hole drilling drilling rod tenon wedge drive joint.

In Fig. 4, the tapering end of voussoir (2) is pressed in the tapering groove on plug (1) pipe, and the big of voussoir (2) holds the inclined-plane, translot forward position on inclined-plane, angle and socket (3) inwall to fit together, and just can carry out work.

As can be seen from Figure 5, socket (3) one ends symmetry vertically have the gathering sill that inserts for voussoir (2) inwards, and its bottom has the translot that is slightly larger than voussoir (2) width again along clockwise direction on socket wall, and the translot front end is an inclined-plane.

During work, kelly steel pipe (4) is done and is turned clockwise, voussoir (2) on the plug (1) is just stirred socket (3) and is driven passive drilling rod and rotate in the same way, the normal reaction that voussoir (2) chamfering inclined-plane bears make himself along plug (1) pipe radially inwardly and the tapering groove on the pipe compress.When main drilling rod hoisted, voussoir (2) upper surface promoted socket (3) translot end face, also upwards hoisted thereby drive a pair drilling rod.When voussoir (2) wear out failure, utilize the breach at its back side voussoir that will give up to prize and trip out, replace with new voussoir, drilling rod just can work on.

Claims

1. a hidden hole drilling drilling rod tenon wedge drive joint is combined by plug and socket, it is characterized in that: be pressed into one in the tapering grooved hole of plug head processing and be used for transfer torque, and the voussoir that can change easily.

2. hidden hole drilling drilling rod tenon wedge drive joint according to claim 1 is characterized in that: plug and socket contain the combination part setting independently, dismountable Connection Element, be used for transfer torque.