CN2289056Y

CN2289056Y - Anchoring-bolt for supporting rib for coal mine gallery

Info

Publication number: CN2289056Y
Application number: CN 97203760
Authority: CN
Inventors: 张健祺; 刘玉华
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-01-13
Filing date: 1997-01-13
Publication date: 1998-08-26
Anticipated expiration: 2007-01-13

Abstract

The utility model relates to an anchor rod used for supporting and protecting mine walls in tunnels of coal mines. The utility model is characterized in that a positioning sleeve is additionally arranged after the end surface of the tail end of a conical body arranged on one end of a screw rod is provided with convex teeth; the end surface on the end of the screw rod is provided with a key groove; the shape of a supporting board arranged on the other end of the screw rod is an even pentagon, and convex taper blocks are arranged on every angle of the supporting board. The utility model has advantages of good tightening and loosening effect, even stress and good supporting and protecting effect in hard rock and soft rock.

Description

The anchor pole that is used for the colliery tunnel support rib

The utility model belongs to E21D class technology, particularly relates to a kind of anchor pole that is used for coal mine roadway supporting rib.

In the tunnel in colliery, fall down, often adopt anchor pole protected, make being fixed on the rock surface that it can be firm for the coal seam that prevents rib, ore deposit top breaks away from rock surface.The part and existing anchor pole also comes with some shortcomings, as: Chinese utility model patent ZL94222695.X, a kind of plastic expansion anchor metal is disclosed, it is the anchor pole based on plastics.Though reduced cost of production, screw rod and nut appear with changeing phenomenon fastening with loosening in the process, and make the anchor pole expansion and shrink influenced; The supporting plate end face is the plane of an annular in addition, then it and rough coal surface is just local contacts, in case coal cinder that should the part is cracked or drop, then whole supporting plate just is in loosening state, even whole anchor pole can come off.

The purpose of this utility model be to overcome the deficiency in the known technology and provide a kind of fastening and relaxation effect good, be difficult for loosening be used for the colliery tunnel support rib/anchor pole.

End at the cone screw rod is installed a cone by nut, suit has the expander of blind groove on cone, the other end of its screw rod is equipped with supporting plate by nut, the purpose of this utility model is: its axis of symmetry is shaped on two raised tooth that shape is identical on the end face of screw rod end, install a positioning sleeve that is shaped on the key parallel on it and is shaped on the groove that is complementary with cone distal end faces raised tooth again additional at the cone end with axis, have on the end face of the screw rod of above-mentioned installation cone with positioning sleeve on the keyway that is complementary of key, the end face peripheral shape of above-mentioned supporting plate is made as uniform pentagon, and is shaped on projection awl piece on its each angle.

Advantage and the good effect that the utlity model has are:

After adopting this structure and since on the tooth on the cone distal end faces groove, the key by positioning sleeve be connected with the keyway of screw rod, so that screw rod and cone can not relatively rotate.Like this, during nut on the turn screw rod, screw rod is by the frictional force of cone surface with the expander inner surface, can not take place with changeing with nut, so expansion of the present utility model and shrink can be not influenced.In addition, the peripheral shape of the end face of supporting plate is made pentagon, and on each angle, all is shaped on projection awl piece, like this fastening/during anchor pole, supporting plate has at least contact at 3 with the coal surface, makes it stressed even, supporting plate is more stable.

The utility model has following accompanying drawing:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is that the B of Fig. 1 is to view.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail:

One end of screw rod 5 is equipped with cone 4, also has keyway 12 on this end end face of the screw rod that cone is housed.Its axis of symmetry is shaped on two raised tooth 9 that shape is identical on the distal end faces of cone.The cone end is installed a positioning sleeve 2 again, be shaped on key 11 parallel with its axis and that be complementary with keyway on the screw rod on the positioning sleeve and be shaped on the cone distal end faces on the groove 10 that is complementary of raised tooth.Nut 1 locking is installed, again at the blind hole suit expander that passes through on this termination on the expander 3 in the termination that has keyway of screw rod.The other end of screw rod is installed supporting plate 6 by nut 7, and its supporting plate end face peripheral shape is made as uniform pentagon, and is shaped on projection awl piece 8 on each angle.

When forward screws nut 7, because the external surface of cone 4 and the inner surface of expander 3 have frictional force not relatively rotate, and with this frictional force by the raised tooth 9 on the cone 4, groove 10 on the positioning sleeve 2, key 11, keyway 12 on the screw rod 5 is delivered on the screw rod, so screw rod does not rotate with nut 7.Like this, screw rod is strained gradually by nut 7, and expander 3 swellings are in rock pore under the active force of cone.Supporting plate 6 clenches the surface, coal seam making the projection awl piece 8 on its each angle be pressed into the coal seam under the pulling force of screw rod.In like manner, when oppositely unscrewing nut 7, expander shrinks, and can take out anchor pole from rock.

Claims

1. anchor pole that is used for the colliery tunnel support rib, mainly be by nut (1) cone (4) to be installed by a end at screw rod (5), suit has the expander (3) of blind groove on cone, the other end of its screw rod is equipped with supporting plate (6) by nut (7) and forms, it is characterized in that: its axis of symmetry is shaped on two raised tooth (9) that shape is identical on the end face of cone (4) end, install a positioning sleeve (2) that is shaped on the key parallel (11) and is shaped on the groove (10) that is complementary with cone distal end faces raised tooth on it again additional at the cone end with axis, have on the end face of the screw rod of above-mentioned installation cone with positioning sleeve on the keyway (12) that is complementary of key, the end face peripheral shape of above-mentioned supporting plate (6) is made as uniform pentagon, and is shaped on projection awl piece (8) on its each angle.