DE202012004635U1 - Device for supplying rinsing medium in a hammer drill - Google Patents

Abstract

Device for supplying a flushing medium to the tool of a rotary hammer, in particular to a tool of a tap hole drilling machine on the blast furnace, consisting essentially of a rotatable and / or axially displaceable drilling tool holding means (1) with at least one supply channel (11) for the flushing medium, a with the holding means (1) cooperating transmission part (2), a housing (3) and a supply means (4) and holding part (5) with a flushing medium inlet (51), characterized in that a substantially axially symmetrical shaped supply means (4) and the associated holding part (5) form a component, preferably a non-detachably connected component, the feed means (4) on both sides distally sliding bearings (41, 41 '), in particular guide bands and seals (42, 42') towards the drilling tool holding means (1) has and the holding part (5) relative to the housing (3) and / or a fixing ring (31) connected thereto radially displaceable within limits when bent, j but is defined tangentially positively.

Description

The invention relates to a device for supplying a flushing medium to the tool of a hammer drill, in particular to a tool of a taphole drill on the blast furnace, consisting essentially of a rotatable and / or axially displaceable drilling tool holding means with at least one supply channel for the flushing medium, a with the holding means cooperating transmission part, a housing and a Zuleitmittel and holding part with a flushing medium inlet.

Rotary hammers with a drilling tool in heavy impact and possibly rotational operation, in particular for the open position of tap holes of metallurgical vessels, usually require a supply of detergent to the work area of the tool to discharge cuttings from the well and, where appropriate, to cool the tool cutting.

In general, the at least one axially extending detergent channel having drilling tool is set in a drilling tool holding means or adapter, which is or in a housing displaceably mounted within limits and rotatable.

A supply of a flushing medium can be effected by means of lines or recesses from the housing in the drilling tool holding means, between these parts seals prevent leakage of the medium.

However, such a dishwashing liquid guide to the tool has the disadvantage that at a moderate wear of the bearings between Bohrwerkzeug-holding means and the housing of the hammer, which indeed enabled a further trouble-free hammer operation, a repair is due to sealing problems. An attempt has already been made to arrange a separate supply means for a flushing medium, which is not integrated into the hammer housing, on a drilling tool holding means extended in the axial direction, which, however, has the disadvantages of a shortened drilling length and an increased loading of the bearing points.

The invention has the object to overcome the disadvantages of the prior art and to provide a means for supplying a flushing medium to the tool of a hammer drill, in particular to a tool of a tap hole drilling machine on a metallurgical vessel of the type mentioned, which is a low wear has in the hard drilling operation and essentially at the same time make it necessary to change the bearing bushes between Bohrwerkzeug-holding means and housing and a change of the seals in the supply path for the detergent.

This object is achieved innovatively in a generic device in that a substantially axsymmetrisch formed supply line and the associated holding part form a preferably non-detachably connected component, wherein the supply means on both sides each have distal sliding bearings, in particular guide bands and seals for Bohrwerkzeug-holding means out and Holding part relative to the housing and / or a fixing ring connected to this radially in limits displaced by bending, but is fixed tangentially positively.

The advantages achieved with the supply line and the associated holding part according to the invention are essentially due to the fact that it is radially movable within limits as a so-called "floating" supply line or supply element, which can create a sealing engagement with the drilling tool holding means, and a Guided by the housing alone in the direction of rotation form fit. The drilling tool holding means can carry out a radial displacement in the housing in the case of wear of the bearings within limits, wherein the component, supply means with holding part, although secured against rotation, but can follow a displacement of the drilling tool holding means.

Also advantageous is the embodiment according to claim 2, in which the radially displaceable component, formed from supply means for the flushing medium and holding part, axially adjacent to the bearing bush, is fixed by a spacer element, and after releasing the fixing ring from the housing of this with the component the supply means including guide straps and seals and the bearing bush with spacer element are extendable.

Such can be made in a simple and economical way at a substantially simultaneous wear of the bearing and sealing elements in the short term repair. In one operation, the seals and guide bands of the supply medium for the flushing medium and the bearing bush for the drilling tool holding means in the housing are exchangeable, with no additional components to disassemble and assemble, whereby the required repair time of the hammer drill is reduced efficiently.

An embodiment of the invention, which merely illustrates an embodiment thereof, is shown in the drawing and will be described below.

It shows:

1 A device for supplying a flushing medium to the tool of a hammer drill

A reference list is intended to facilitate an association of the functional means and parts in the representation.

LIST OF REFERENCE NUMBERS

1

Drilling tool holding means

11

Supply channel for flushing medium

2

transmission part

3

casing

31

fixing

4

supply means

41, 41 '

bearings

42, 42 '

poetry

5

holding part

51

Flushing medium inlet

6

bearing bush

61

spacer

1 shows in section a device according to the invention, wherein above the center line, the drilling tool holding means is shown in the advanced position and below the center line in the reset position.

A drilling tool holding means 1 has a receiving area for a tool with flushing channel in the distal projecting area. Centric in the base area of a tool holder from the holding means 1 there is a hollow, which by means of an oblique bore to the outside a supply channel 11 forms for a flushing medium.

A drilling tool holding means 1 is from a transmission part 2 intermittently and optionally driven in rotation and has work related, based on a housing 3 , an advanced and a deferred position.

To ensure an uninterrupted supply of detergent to the tool, has a supply means 4 an ax-symmetrical radial recess having a length which is at least a distance between the advanced and the recovered position of the drill tool holding means 1 equivalent.

A delivery agent 4 is with a holding part 5 firmly to a component 4 . 5 connected, wherein in the holding part 5 a flushing medium inlet 51 with a connection to the radial recess in the supply line 4 consists.

On both sides of a radial recess in the supply line 4 are directed distally inwards to the axis sliding bearings or guide bands 41 . 41 ' and seals 42 . 42 ' to the drilling tool holding means 1 arranged.

A component consisting of supply means 4 and holding part 5 , lies by means of bearings 41 . 41 ' and seals 42 . 42 ' on the one hand on the outer surface of the drill tool holder 1 on the other hand, by the holding part 5 from the case 3 with fixing ring 31 loose.

A loose guide is such that in the radial direction, the component 4 . 5 is displaceable, but tangentially a flat or similar stop prevents rotation of the element, so that the supply means 4 so to speak "floating" on the drilling tool holding means 1 whose radial displacement follows.

If according to the invention, the bearing bush 6 in the case 3 for the drilling tool holding means 1 determined by a spacer 61 and a delivery means 4 for a flushing medium, are positioned axially adjacent, as can 1 is easily removed, after loosening a fixing ring 31 in a simple way in a repair of the hammer drill after discharge of the drilling tool holding means 1 the supply means 4 and the bearing bush 6 with the spacer element 61 pulled off and served parts in the case 3 be brought back.

Claims (2)

Means for supplying a flushing medium to the tool of a hammer drill, in particular to a tool of a taphole drill at the blast furnace, consisting essentially of a rotatable and / or axially displaceable drilling tool holding means ( 1 ) with at least one supply channel ( 11 ) for the flushing medium, one with the holding means ( 1 ) cooperating transmission part ( 2 ), a housing ( 3 ) and a delivery means ( 4 ) as well as holding part ( 5 ) with a flushing medium inlet ( 51 ), characterized in that a substantially axsymmetrisch shaped supply means ( 4 ) and the associated holding part ( 5 ), preferably form a permanently connected component, wherein the supply means ( 4 ) on both sides each distally sliding bearing ( 41 . 41 ' ), in particular guide bands and seals ( 42 . 42 ' ) to the drilling tool holding means ( 1 ) and the holding part ( 5 ) opposite the housing ( 3 ) and / or a fixation ring ( 31 ) radially in limits displaceable at bending, but tangentially positively fixed. Device according to claim 1, characterized in that the radially displaceable component, formed from supply means ( 4 ) for the flushing medium and holding part ( 5 ), axially adjacent to the bearing bush ( 6 ) defined by a spacer element ( 61 ) is positioned and after loosening the fixing ring ( 31 ) from the housing ( 3 ) from this the component ( 4 . 5 ) with the supply means ( 4 ) with guide straps ( 41 . 41 ' ) and seals ( 42 . 42 ' ) and the bearing bush ( 6 ) with spacer element ( 61 ) are extendable.

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