DE7426315U - Elastic pipe connector - Google Patents

Description

HAMBURG 1. AD E N AU ER ALLEE 30. TELEPHONE (0411) 34 45 23

File number ; New registration

Elastic pipe connector

The invention relates to an elastic pipe connector with a fabric-reinforced bellows made of rubber and / or elastomer Plastic with a curved expansion shaft and outwardly protruding end sections as well as ring-shaped ones that engage behind them Connectors of metal.

The known pipe connectors of this type have indeed proven themselves for many purposes, but can with regard to the compressive strength with or without simultaneous exposure to elevated temperatures still leaves something to be desired.

The object of the invention is now to provide pipe connectors of the initially to create mentioned type, which with a simple structure a significantly increased compressive strength even under action have a higher temperature, are easy to manufacture and assemble and result in a reliable seal at the installation sites.

To solve this problem, the elastic pipe connector of the type mentioned is characterized according to the invention, that the bellows has cylindrical transition sections on both sides of the expansion shaft, the end sections of the bellows have a conical outer surface, in the bellows at least one preformed, continuous over its length Steel cord is embedded, the steel cord in the end portions of the bellows near the outer surface thereof Cone sections and on their outside adjoining, im

-2-

7426315 28.0575

-2-

essentially radially inwardly directed web sections _y in the end sections of the bellows in each case a core ring made of metal, encompassed on the outside by the conical section and the web section relative to the inner diameter of the connecting part, is arranged on the transition sections of the bellows in each case a rigid metal ring is pushed up to the expansion level and the Connecting parts have a conical surface adapted to the outer surface of the end piece on their inner edge.

According to a preferred embodiment, the Xernrings are each behind in one on the inside of the end sections an inner groove that contains the web section and is located essentially radially inwards. The connecting parts advantageously each have an annular groove which is recessed outwardly following the conical surface Recording of the area of the end section of the bellows which is pressed in during installation and which surrounds the distant ring.

According to another embodiment, the core rings can be embedded in an end section with a conical outer surface and a substantially cylindrical inner surface. Here can the steel cord insert yet another adjoining the web section, around the embedded core ring in the direction of Have stretch wave receding section. An annular groove can be added on the inner surface of the end section be arranged, in which a rigid inner ring is used on the metal.

Further embodiments of the invention are described in the sub-claims.

In the following a preferred embodiment of the pipe connection piece with reference to the accompanying drawing further explained, which shows a partially sectioned side view of the pipe connector.

-3-

The pipe connection piece shown in the drawing has "a bellows 1 made of Gumai or elastomeric" plastic, the cylindrical transition sections 5 adjoining an expansion shaft k on both sides, and adjoining these, axially outwardly conically widening end sections 6 with inwardly directed edge webs 8 at their outer ends . In the bellows 1, a continuous steel cord insert 2 is embedded over its lite, which has a conical section 2a running in the end section 6 parallel to its conical outer surface 6a and a radially inwardly directed web section 2b arranged in the edge web 8. It is essential that the steel cord insert 2 is preformed into a shape corresponding to it before it is embedded in the bellows 1.

A rigid steel ring 11 is pushed onto the bellows 1 from both sides up to the expansion shaft 4. The connection parts 3 are designed as ring fans and have on the axially outward side of their inner edge each one of the outer surface 6a of the end sections 6 adapted conical surface 9 and an outwardly recessed annular groove 10 the adjacent metal ring 11 pushed on. In each of the end sections 6 protruding outward through the openings of the connecting parts j , a core ring 7 made of flexible steel wire rope is inserted so that it lies in an inner groove enclosed by the conical end sections 6 and the inwardly directed edge webs 8.

For the production of the connector piece according to the invention wizd first pre-formed the required steel cord insert 2 by means of profile rolls or a suitable shaped piece. Included the steel cord insert can have a non-vulcanized rubber coating even before the preforming. Can through vulcanization the retention of the generated shape can be achieved. The pre-formed steel cord insert can then be coated on the outside with a suitable adhesive and inserted into a pre-formed,

Inner rubber bellows coated with adhesive are inserted * X »in a corresponding manner can be in the interior of the Stahlkcrdeinlajre 2 egg »coated with glue on the outside, preformed InnonrohMng t.ue rubber or an elastomer Plastic with the desired temperature and / or chemical resistance can be introduced · The blank obtained wi "i then connected under pressure to form a uniform bellows 1 with an embedded steel cord insert 2 To use steel cord inserts. Through the steel card insert are made in the rubber or plastic layers of the bellows embedded in part made of synthetic fibers relieved, as the steel wires of the steel cord insert prevent radial expansion.

After the completion of the bellows 1, the metal rings 11 are first pushed over the edge webs 8 and the conical end sections 6 as far as against the cutting shaft k . Subsequently, the connecting parts 3 are attached to the metal rings 11 up to the stop and finally the core rings 7 are introduced through the edge webs 8 into the end sections 6.

When installing the pipe connection piece according to the invention, the connecting pieces J , designed as an annular flange, are tightened by means of screw bolts (not shown) against counterflanges 12 shown in dashed lines in the drawing, with a sealing surface 13 arranged on these, the edge webs C of the bellows 1 and the core rings 7 each in the annular grooves 10 of the connecting parts Press in 3. This ensures that the steel ^{cord insert 2 can pull itself out of its pressed-in position even at very high pressures n} u & the core ring 7 and at the same time the edge webs 8 are increasingly pressed against the sealing surfaces 13 with increasing pressure, so that even at very high pressure a reliable sealing is achieved

-5-

The disadvantage that occurs at higher temperatures is avoided vulcanizes the rubber sealing surface and thus loses its sealing effect.

Instead of the one shown in the drawing, as an annular flange trained connection parts can of course also be used as multi-part screw connections designed connection parts will.

That explained above with reference to a preferred embodiment The pipe connector can be appropriately modified in various ways by the person skilled in the art, depending on the requirements , in particular the number and thickness of the steel cords 2, the metal rings 11 and the core rings 7 and the dimensions and the ¥ angular direction of the conical surfaces 9 and the conical outer surfaces 6a of the end sections 6 and the dimensions of the edge web 8 should be appropriately matched to one another. In addition, the bellows 1, if necessary, have inner and / or outer protective layers which, depending on the requirements, have an adequate Resistance to high or low temperatures, mechanical Abrasion or attack by chemical substances

7426315 2aos.7S

Claims (1)

Dipl.-CheW DRfVtARALD STACH PATENT ADVOCATE 2 HAMBURG 1 ■ ADENAUERALLEE 30 · TELEFON (Ο411) 34 45 23 File number new registration MflBNTAKSPRÜCBS 1.) Elastic pipe connector with a fabric-reinforced Bellows made of rubber and / or elastomeric plastic with generally arched dezraungswelle and upwardly protruding band sections as well as these engaging, ring-shaped connecting parts made of metal, characterized in thatχ a) the Ba. ¹ g (i) has cylindrical transition sections (5) on both sides of the expansion shaft (4), b) the end sections (6) of the bellows have a conical outer surface (6a), c) in the bellows (1) at least one preformed over it Length of continuous steel cord insert (2) is embedded, d) the steel cord insert (2) in the band sections (6) of the bellows (() near its outer surface (6a) running cone sections (2a) and adjoining them on the outside, web sections (2b) directed essentially radially inward, e) in each of the end sections (6) of the bellows (1) a connecting part encompassed on the outside by the conical section (2a) and the web section (2b) relative to the inside diameter of the connecting part (3) larger core ring (7) made of metal is arranged, f) a rigid metal ring (11) is pushed onto the transition sections (5) of the bellows (1) up to the expansion shaft (k) and g) the inner edge of the element (3) connects to a conical surface which is adapted to the outer surface (6a) of the end sections (6) (9) own. 2) Pipe connector according to claim 1, characterized in that that the core rings (7) each in one on the inside of the end section (6) behind one containing the web section (2b), directed essentially radially inward 7426315 2105.75 -2-edge web (8) lying inner groove are arranged. 3.) Pipe connector according to claim 1 or 2, characterized in that the connecting parts (3) each have one the conical surface (9) then outwardly recessed annular groove (10) to accommodate the pressed in during installation, the Core ring; (7) surrounding area of the & end section (6) exhibit. 4.) Pipe connector according to one of the openings 1 to 3 »characterized in that the core rings (7) ia. an end section (6) with a conical outer surface (6a) and a substantially cylindrical inner surface are embedded. 5.) Pipe connector according to claim h _t, characterized in that the steel cord insert (2) also has a section adjoining the web section (2b) and running back around the embedded core ring (7) in the direction of the expansion shaft (k) . 6.) Pipe connector according to claim k or 5, characterized in that an annular groove is arranged on the inner surface of the Endabschnitta (6) and in this a rigid inner ring made of metal is einei tzt. 7 ·) Pipe connector according to one of claims 1 to 6, characterized in that the core ring (7) consists of a flexible S + ahldrahtseii _o 8 «) pipe connector according to one of claims 1 bit. 7 »characterized in that the connecting parts (3) are designed as ring flanges. 9 «) pipe connector according to one of claims 1 to 7t, characterized in that the connecting parts are Ansychlagflachen ■ Have engagement with at least one rotatable versatility • learner.