Untitled record

Ball jointed high-pressure pipe connection Addendum to Patent (Pat. Appl. P 20 o9 856.o 12) The patent (Pat.Anm. P 20 o9 856.o-12) relates to a ball joint-like connection for rigid, especially high pressure lines and connecting the same to devices of all kinds, the ball joint pressure balanced by the arrangement of two cross-transverse bores in the ball head and the seal between the surface and the ball joint housing is such that the stresses occurring in rigid piping systems, Displacements Let torsions and assembly and alignment errors be compensated without interposing other elastic elements.

The invention relates to a further development of this ball joint-like compound or a particularly zweckmaenige arrangement thereof and causes the all sides movable articulated connection between two relatively moving connection points on any devices, not only the two ball joints are pressure balanced, but also from a telescopic tube existing connecting line between the two ball joints.

It is known that the known for the production of such compounds between relatively moving parts hose lines are then no longer sufficient if it is high LeitungsdrTicke because such hose lines lose their mobility and stiffen with increasing pressures.

There are therefore known as movable Ubertragungsorgane for media with higher pressures from several connected via cross and swivel joints Rohr.stücke (US Patent 1,785.o95), wherein the connecting line between adjacent joint bodies may be formed as a telescopic tube (French.

Patent 992,512). Such Gelenkle ments require a high economic outlay and need a lot of space even with only 3Wegungsspiel. The hinges are subject to high wear and the sealing can be difficult to accomplish. But the largest part of such joints is their own weight. Under his influence, the joint line collapses and can no longer perform the necessary movements.

With the invention, these disadvantages are eliminated. According to the invention, the joint line consists of two ball joints according to patent (Pat.Anm. P 20 o9 856.o-12), which are attached to the two articulated and relatively moving machine parts or the like with its one connecting piece, while between the two Another connection piece a telescopic tube is used, which is set up as the 6fugelgelenke pressure balanced.

Vorteilhsftereise the telescopic tube consists of an inner tube, which connects directly to the connecting piece of a ball joint and a the inner tube at a distance surrounding the outer tube, which connects at its opposite end to the connecting piece of the other ball joint. In this case, the inner tube has a the annular space to the outer tube bridging collar, which represents the stop limit for the telescopic tube displacement in both directions. This collar is provided with a seal to the inner shell of the outer tube. Further seals are located between the terminal end of the outer tube on zugeord @ eten ball joint and the outer shell of the inner tube and this and the inner surface of the connection of the inner tube to the amdere ball joint facing terminal body of the outer tube, these directions are acted upon by the internal pressure such that here in contrary.

set axial direction occurring approximately cancel.

For a high-pressure safe transfer of gaseous or liquid media is achieved by relatively movable machine parts with little space and economic effort, with a machine part can also be rigid. The ball joints take over the lateral Jusschläge, and the telescopic tube compensates for the occurring changes in length. In addition, there is a relative rotation between the inner tube and the outer tube of the telescope.

With reference to the embodiment shown in the accompanying drawings further details are explained.

1 shows the longitudinal section of the joint line approximately in the middle position of the telescopic tube, and FIG. 2 shows, on a reduced scale, the external view of the joint line of FIG. 1 in an end position.

The two ball joints correspond essentially to the BauS, veise in the exemplary embodiment of the patent (Pat.Anm. P 20 o9 856.o-12), only their structure is simplified. The ball heads 1 are connected by means of their connection piece 2 to the relatively moving machine parts 3 and 4. The ICugelköpfe 1 are enclosed by the housings 5 ​​and mounted between the inserted there Kalottenringen 6 and the inside dome-shaped locking screws 7 of the housing. 5 The sealing between the, Kalotten ~ ingen 6 and the housings 5 ​​on the one hand una the ball heads on the other hand take over the embedded in a recess 8 of the Kalottenringe 6 Mchtringe 9, which rest with their inner edges the ball heads. The sealing between the screw plug 7 and the housings 5 ​​on the one hand and the ball heads 1 on the other hand take over the sealing rings 10 which abut with their inner peripheral edges of the ball heads 1 and are incorporated themselves in recesses 11 of the screw plugs.

These mutually parallel sealing rings 9 and 10 have the same cross sections and diameter and sit with bias in their bearing grooves 8 and 11, so that even in the unpressurized state of the teitungsmedien a perfect sealing of the ball heads is achieved in the cases. With the help of incorporated in the ball heads cross holes 12, 13, which open to avoid throttling phenomena in the annular channels 14. the guide wire pressure acts on these sealing rings 9 and 10, the sealing effects initially increasing with constant pressures and simultaneously acting on the ball heads in radial directions on the imaginary Mtftelpunkte the ball heads to mutually canceling pressure forces, so that the ball heads, so to speak between these sealing rings 9 and 10th pressure balanced swimming. To limit the pivoting angle between the housings and the ball heads are provided outside of the sealed surface area of ​​the ball heads provided spaces in which parts of the ball heads on wall surfaces of the housing can indirectly or immediately after denwenkbewegungen to stop.

In the illustrated embodiment, conical projections 15 are provided on the ball heads, the same come to the cylindrical inner walls 16 of the screw plug 7 during pivotal movements of the same. In the other housing portion, the inner surfaces 17 of the Kalottenringe 6 are conically designed as a stop limit for the connection piece 2, sitting on one side of the housing 5, the transfer line 18 and between them is a telescopic tube installed as a link, which receives the Achsialbewegungen. This Teleskoproh sets as dom inner tube 19 and this ummantalnden ummantalnden outer tube 2e together, which can move axially relative to each other and rotate. While the inner tube 19 is connected to the transfer port 18 of a ball joint, the outer tube is in communication with the transfer port 18 of the other ball joint. Conveniently, these connections are made with the help of per se known Echneidringverschraubunge. For this purpose, each transfer nozzle on the outer jacket with Gevinde and the inside is provided with the required receiving cone for the cutting ring 21, the use of the Übermurfmutter 22 on the outer thread of the Überleitungs @ rutzen 18 in the Außenmäntal the Anschlußrchrteile einschraider and so make the high pressure seal. In this case erfo @ gt connecting the inner tube 19 immediately.

The outer tube 20, however, has at both end portions Gleitführungskörper for the inner tube, which are sealed against this, which will be explained in more detail. The Gleitfiihrungskörper is designed as Arischlußstück 23 sm transfer pipe 18 and provided on the inside with a cylindrical sliding guide for the inner tube on a lung, which corresponds to the measure of the axial extension possibility of the telescope. The other sliding guide body on the other end region of the outer tube 20 is formed as a closure piece 24. Connecting piece 23 and closure piece 24 are erbund with corresponding threaded portions 25 and 26 with the outer tube 2c.

The sealing of the terminal pin 23 gegenücer the inner tube 19 assumes the inserted into a in the sliding cylinder surface of the connecting piece 23 nit bias inserted ring seal 27 which is supported by mines inserted support ring 28.

The sealing between the closure piece 24 and the inner tube 19 takes over the in the sliding cylinder surface of the closure piece preloaded inserted ring seal 29. As a sealing gege: 1iiber the outer tube 20 is the interposed at the outlet of the threaded portion 26 seal 30. In the sliding cylinder surface of the Verschlußstüclces is still a another groove for receiving a dust ring 31, for example made of felt, provided, whereby the penetration of dirt is prevented in the telescope. In order to achieve the pressure compensation for the axial movement of the telescope, a flange 32 is provided on the inner tube 19, which über'drückt the free space to the inner surface of the outer tube 20 and at the same time limited with its end faces the displacement of the telescope in both Achsialrichtungen. Once the left end face abuts the support ring 28, isidas telescope pushed together to the smallest possible size. Conversely, the abutment of the other end face of the flange 32 on the closure piece 24 limits the maximum extension of the Telekops.

Between the flange 32 and the closure member 24 is formed by means of the bore 33 an acted upon by the pressure of the conduit medium space acting on one side to the seal 29 and on the other side on the seal 34, in an outer groove 35 of the flange 32nd with a bias against the outer tube seals, with a blasting or Seeger ring 36 forms the end of the groove space 35 and at the same time the limit for the maximum Ausziehweg the telescope, as described above. The pressure equalization in the axial direction is achieved in that the AbmessZmgen the seals 27, 29 and 34 are chosen so that the pressure on the seal 27 from the medium through the annular gap between the inner shell of the connecting piece 23 and the outer jacket of the inner tube 19 as the pressure auf'die differential surface of the oppositely pressurized sealing surfaces 29 and 34 corresponds. A bore 37 in the outer tube serves to vent the space 38 between the flange 32 and the connecting piece 23rd

Patent claims