DE3303416C1

DE3303416C1 - Device for detaching and connecting two pipes

Info

Publication number: DE3303416C1
Application number: DE19833303416
Authority: DE
Inventors: Günter Bauer; Ulrich 5960 Olpe Berghoff
Original assignee: BEBA DREHEREI GmbH
Current assignee: BEBA DREHEREI GmbH
Priority date: 1983-02-02
Filing date: 1983-02-02
Publication date: 1983-12-29

Abstract

With a device for detaching two pipes which can be screwed to one another, for example by means of a collar, for example the drilling rod of a drilling device for drilling out rock samples, in order that the pipes can be detached very easily and safely it is proposed that said device have two pipe clamping-in devices (1, 2) which are at an axial distance from one another and are aligned coaxially with respect to one another, one of which is held on the rotatable inner ring (4) of a bearing (5) which is likewise aligned coaxially, and the other of which is rigidly connected to the outer ring (6) of the bearing (5), that the clamping device (1) which is held on the inner ring (4) is constructed such that it can rotate about its longitudinal axis by means of a drive (7) which is held on the other clamping device (2) or a component which is rigidly connected thereto, and that the clamping devices (1, 2) are axially displaceable relative to one another, at least to a limited extent. <IMAGE>

Description

Anstelle der Ausbildung des Antriebes als Schnecke und Schneckenradkranz könnte zwar auch ein lediglich reibschlüssiger Verbund zwischen dem Antrieb und der gegenüber diesem verdrehbaren Spannvorrichtung vorgesehen sein, jedoch ist ein Schneckenantrieb oder auch ein Antrieb mittels Ritzel und Zahnkranz besonders funktionstüchtig und vorteilhaft. Durch die Anordnung des Schneckenradkranzes auf der entsprechenden Hülse ist die Ausbildung und Funktion der demzufolge mit Abstand von dem Schneckenradkranz angeordneten Spannvorrichtung ungehindert von dem Schneckenradkranz bzw. von der mit diesem in Wirkverbindung stehenden Schnecke möglich. Die Anordnung der Führungsstangen ermöglicht darüber hinaus eine besonders einfache und funktionstüchtige Relativbewegung der beiden Spannvorrichtungen in axialer Erstreckungsrichtung zueinander.Instead of the drive being designed as a worm and worm gear rim could also be a merely frictional connection between the drive and which can be provided with respect to this rotatable clamping device, but is a Worm drive or a drive by means of a pinion and gear rim is particularly functional and beneficial. By arranging the worm gear rim on the corresponding The sleeve is the design and function of the accordingly spaced from the worm gear rim arranged clamping device unhindered by the worm wheel rim or by the with this in Functionally connected snail possible. The order The guide rods also enable a particularly simple and functional Relative movement of the two clamping devices in the axial direction of extent to one another.

Als zweckmäßig wird angesehen, daß das Lager als Kugellager ausgebildet ist. It is considered expedient that the bearing is designed as a ball bearing is.

Weiterhin ist für das selbsttätige Lösen der Spannbacken vorteilhaft, wenn in an sich bekannter Weise die Spannbacken der Spannvorrichtungen entgegen einer Federkraft spannbar sind. Furthermore, it is advantageous for the automatic loosening of the clamping jaws, if in a manner known per se, the jaws of the clamping devices counteract can be tensioned by a spring force.

Da bei der Anwendung derartiger Bohrgestänge häufig keine elektrischen Antriebsquellen verfügbar sind, jedoch über hydraulische Leitungen hydraulische Medien praktisch immer zur Verfügung stehen, ist besonders vorteilhaft, daß als Antrieb für die Schnecke ein Hydraulikmotor am Außenring des Lagers befestigt ist. Since when using such drill rods often no electrical Drive sources are available, however, via hydraulic lines hydraulic Media are practically always available, is particularly advantageous that as A hydraulic motor is attached to the outer ring of the bearing to drive the worm.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und im folgenden näher beschrieben. Es zeigt F i g. 1 eine erfindungsgemäße Vorrichtung in Seitenansicht; F i g. 2 desgleichen in Richtung der Pfeile II-II gesehen; F i g. 3 die Vorrichtung gemäß F i g. 1 um 90" axial verdreht gesehen; F i g. 4 die Vorrichtung gemäß F i g. 3 von oben gesehen. An embodiment of the invention is shown in the drawing and described in more detail below. It shows F i g. 1 a device according to the invention in side view; F i g. 2 also seen in the direction of arrows II-II; F i G. 3 shows the device according to FIG. 1 seen axially rotated by 90 "; FIG. 4 the Device according to FIG. 3 seen from above.

Die Vorrichtung zum Lösen zweier miteinander beispielsweise durch eine Muffe schraubverbundener Rohre besteht im wesentlichen aus zwei axialen Abstand voneinander aufweisenden, koaxial zueinander ausgerichteten Rohreinspannvorrichtungen 1, 2. Die Spannvorrichtung list über eine Hülse 3 am drehbaren Innenring 4 eines Lagers 5 befestigt Die Verbindung kann durch Schweißen oder sonstige geeignete Mittel erfolgen. The device for releasing two with each other, for example a socket of screw-connected pipes consists essentially of two axial distances pipe clamping devices having mutually coaxially aligned pipe clamping devices 1, 2. The clamping device list via a sleeve 3 on the rotatable inner ring 4 of a Bearing 5 attached The connection can be made by welding or other suitable means take place.

Die andere Spannvorrichtung 2 ist mittelbar am Außenring 6 des Lagers 5 befestigt. Das Lager 5 ist im Ausführungsbeispiel als Kugellager ausgebildet. Die am Innenring 4 gehalterte Spannvorrichtung 1 ist durch einen Antrieb 7 um ihre Längsachse drehbar, wobei der Antrieb am Außenring 6 des Lagers 5 befestigt ist. The other clamping device 2 is indirectly on the outer ring 6 of the bearing 5 attached. The bearing 5 is designed as a ball bearing in the exemplary embodiment. The held on the inner ring 4 clamping device 1 is by a drive 7 to their The longitudinal axis is rotatable, the drive being fastened to the outer ring 6 of the bearing 5.

Insbesondere ist auf der rohrförmigen Hülse 3 außenseitig ein ringförmiger Schneckenradkranz 8 angebracht, zum Beispiel aufgeschrumpft. Demgegenüber ist am Außenring 6 des Lagers 5 als Antrieb 7 eine über einen Hydraulikmotor 9 antreibbare Schnecke 10 befestigt.In particular, on the outside of the tubular sleeve 3 is an annular one Worm wheel rim 8 attached, for example shrunk on. In contrast, is on Outer ring 6 of the bearing 5 as a drive 7 can be driven by a hydraulic motor 9 Screw 10 attached.

Zum Zwecke der mindestens begrenzten axialen Verschieblichkeit der Spannvorrichtungen 1 und 2 relativ zueinander ist der Außenring 6 des Lagers 5 über achsparallel zur Achse des Lagers 5 angebrachte Führungsstangen 11 mit einer Hülse 12 verbunden, welche wiederum mit der Spannvorrichtung 2 fest verbunden ist An der Hülse sind radial außen Aufnahmen 13 angebracht oder angeformt, die Lochungen 14 aufweisen, in welche die vom Außenlagerring 6 abstrebenden Führungsstangen 11 mit Bewegungsspiel eingreifen. For the purpose of at least limited axial displaceability of the Clamping devices 1 and 2 relative to one another, the outer ring 6 of the bearing 5 is over axially parallel to the axis of the bearing 5 attached guide rods 11 with a sleeve 12 connected, which in turn is firmly connected to the clamping device 2 at the On the outside of the sleeve, receptacles 13 are attached or formed, the perforations 14 have, in which the striving from the outer bearing ring 6 guide rods 11 with Intervene movement play.

Die Spannvorrichtungen sind in üblicher Weise mit Spannbacken 15, 16 versehen, die ineinandergreifen können, um so möglichst viele Rohrabmessungen damit einspannen zu können. Sie sind entgegen der Kraft von Federn 17, beispielsweise Schraubenfedern, anspannbar, wobei im Ausführungsbeispiel das Anspannen durch eine Knebelschraube 18 erfolgt Die Funktion der Vorrichtung ist derart, daß beispielsweise zum Lösen zweier schraubverbundener Rohre die Trennstelle etwa mittig zwischen den Spannvorrichtungen 1 und 2 angeordnet wird. Danach wird das eine Rohrende bzw. die Muffe mit der Spannvorrichtung 1 festgespannt, während das andere Rohrende durch die Spannvorrichtung 2 fest eingespannt gehalten wird. Anschließend wird der Antrieb 7 in Betrieb genommen, wozu der Hydraulikmotor 9 die Schnecke in Drehung versetzt und somit das Schnekkenrad 8 samt dem von der Spannvorrichtung 1 gehaltenen Teil relativ zu dem anderen, von der Spannvorrichtung 2 gehaltenen Teil gedreht wird. The clamping devices are in the usual way with clamping jaws 15, 16 provided, which can interlock, to as many pipe dimensions as possible to be able to clamp with it. You are against the force of springs 17, for example Helical springs, can be tensioned, wherein in the exemplary embodiment, the tensioning by a T-screw 18 takes place The function of the device is such that, for example To loosen two screw-connected pipes, place the separation point approximately in the middle between the Jigs 1 and 2 is arranged. Then one end of the pipe or the Socket clamped with the clamping device 1, while the other end of the pipe through the clamping device 2 is held firmly clamped. Then the drive 7 put into operation, for which purpose the hydraulic motor 9 sets the worm in rotation and thus the worm wheel 8 together with the part held by the clamping device 1 is rotated relative to the other, held by the clamping device 2 part.

Hierbei wird die Schraubverbindung gelöst, wobei entsprechend der Gewindesteigung der Schraubverbindung eine relative Entfernung der Spannvorrichtungen 1 und 2 voneinander vor sich geht. Das vollständige Lösen der Schraubverbindung ist akustisch leicht erkennbar, da dann das Gewindeende der voneinander entkoppelten Teile Schlaggeräusche verursacht Der Antrieb 7 wird dann außer Betrieb gesetzt und die Spannvorrichtung 1 gelöst. Das gelöste Rohrstück kann daraufhin nach oben in Zeichnungsrichtung entnommen werden. Here the screw connection is loosened, whereby according to the Thread pitch of the screw connection a relative distance between the clamping devices 1 and 2 of each other is going on. The complete loosening of the screw connection is easily recognizable acoustically, as the thread end of the decoupled from each other then Parts causing impact noises The drive 7 is then put out of operation and the clamping device 1 released. The loosened piece of pipe can then go up into In the direction of the drawing.

Anschließend wird die Spannvorrichtung 2 gelöst und das beispielsweise zum wesentlichen noch in der Erde befindliche Rohrstück weiter herausgezogen, bis die nächste Trennstelle zwischen den Spannvorrichtungen 1 und 2 angeordnet werden kann. Die weitere Funktion erfolgt analog obiger Beschreibung. Then the clamping device 2 is released, for example to the essential pipe section still in the ground pulled out until the next separation point between the clamping devices 1 and 2 can be arranged can. The rest of the function is analogous to the description above.

Die Vorrichtung ist auch zum Festschrauben von derartigen Rohrschraubverbindungen geeignet, wobei lediglich eine Drehsinnumkehr des Antriebsmotors 7 zu erfolgen hat Ansonsten ist die Vorgehensweise analog dem oben Beschriebenem. The device is also suitable for screwing such threaded pipe connections suitable, with only a reversal of the direction of rotation of the drive motor 7 has to take place Otherwise, the procedure is analogous to that described above.

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Claims

Claims: 1. Device for releasing and connecting two with Threaded pipes, in particular pipes that can be connected by means of a sleeve, in particular a drill string for rock drilling, with two axially spaced apart, coaxially aligned pipe clamping devices, one on the rotatable Ring of a also coaxially aligned bearing supported and the other with the non-rotatable bearing ring is rigidly connected, the mounted on the rotatable ring Clamping device by a drive that is attached to the other clamping device or a is supported with this rigidly connected component, is rotatable about its longitudinal axis, d a d u r c h characterized in that the two rings (4; 6) of the bearing (5) in one are arranged in a common plane lying perpendicular to the longitudinal axis of the device, wherein the rotatable ring (4) is inside and the non-rotatable ring (6) is outside, and that the clamping devices (1; 2) can be axially displaced at least to a limited extent with respect to one another the clamping device (1) held on the inner ring (4) of the bearing (5) Via a tubular sleeve (3) which has an annular worm wheel rim on the outside (8) or the like. Is attached to the inner ring (4), and a motor-driven one to the outer ring (6) Drivable Scnnekke (10) or the like that correspond to the worm wheel rim (8). is supported, and the outer ring (6) of the bearing (5) via axially parallel to the bearing axis attached guide rods (11) and a radially outer receptacle (13) with axially parallel to the central axis of the clamping device (2) extending through holes (14) for the guide rods (11) carrying, coaxially arranged sleeve (12) with the associated Clamping device (2) is connected.

2. Apparatus according to claim 1, characterized in that the bearing (5) is designed as a ball bearing.

3. Apparatus according to claim 1 or 2, characterized in that the clamping jaws (15, 16) of the clamping devices (1, 2) against a spring force are tensionable.

4. Device according to one of claims 1 to 3, characterized in that that the drive (7) for the screw (10) is a hydraulic motor (9) on the outer ring (6) of the bearing (5) is attached.

The invention relates to a device according to the preamble of the claim 1.

- Such devices are for example from DE-AS 21 15 085, DE-AS 20 47 587 and US-PS 18 02 210 are known.

With these devices, however, the delivery is the one to be solved or to be screwed pipe connection somewhat difficult, since the distance vary between the two clamping devices only with relatively great effort On the basis of this prior art, the invention is based on the object to create a device of the type described above, with which the distance can vary between the two jigs without much effort, what the Delivery of the pipe connection to be loosened or screwed make it easier would.

The solution to this problem is in the characterizing part of the claim 1 referred to.

This training makes it possible to reduce the distance between the two Clamping devices very easy to vary, so that the infeed of the to be loosened or to be screwed pipe connection is made much easier by the DE-OS 27 04 154 and DE-AS 26 877 are known similar devices, with these are the two clamping units on a lateral guide bar and not on a common pivot bearing.

The device according to the invention has two axial distances from one another having, coaxially aligned pipe dispensing devices. These Clamping devices can be designed as pipe vices in a manner known per se be. The jaws should be able to move into one another so that they are relatively small and also clamped relatively large pipe diameters with one and the same Vorrich device can be. The term "coaxial" corresponds to that of the clamping devices and other devices of the devices to be clamped coaxially Pipe section defined The one clamping device is on the rotatable inner ring of the pipe to be clamped coaxially fastened with game encompassing bearing in a suitable manner. The other clamping device is rigidly connected to the outer ring of the bearing in such a way that that a relative rotation between this jig and the outer ring of the camp is prevented, but it is provided that the clamping devices are axially displaceable at least to a limited extent relative to one another. This is used to Purpose that when loosening or tightening the screwed pipes or these connecting sleeve a play corresponding to the thread height is possible Furthermore, the clamping device held on the inner ring is driven by a drive rotatable, the one on the other clamping device or one rigidly connected to this Part is attached.

For loosening two screw-connected directly or by means of a sleeve Pipes, the drive is put into operation so that a relative rotation of the Clamping device over the other clamping device is achieved. It is So only required for the operating staff, the connection point between to arrange the two jigs, then tighten the jigs and then set the drive in motion. This makes the connection automatic and solved completely harmlessly for the operator.

The sequence of movements when screwing the pipes together or when screwing them in the socket is analog.