DE7244501U - Centering ring for flange connections in vacuum technology - Google Patents

Description

Pinr.a Rudolf Brand, 6980 Wertheim-Glashütte

Centering ring for flush connections in vacuum technology

The invention relates to a centering ring for flange connections vacuum technology with a rubber-elastic sealing ring.

Flange connections are used to connect vacuum lines. so-called small flange connections, some of which are standardized, with two opposing ones with the help of clamping rings Flanges are axially compressed. It is known to use centering rings inside, and between rubber-elastic sealing rings are to be provided for the flange parts. Due to the axial pressure of the clamping rings, the such a rubber-elastic one placed on a centering ring Seal or O-ring on the Stirr.flachen the Flanges.

However, such arrangements have a number of disadvantages. The centering ring is arranged within the sealing surface, i.e. on the vacuum side and must therefore meet various vacuum-technical requirements. The centering ring is mainly made of stainless steel so that it cannot oxidize. Because the seal is out of centering occurs, undesirable gaps also form on the vacuum side.

The invention is based on the object of providing a centering ring -2-

The fee schedule of the German Chamber of Patent Attorneys applies to the contract. - Place of jurisdiction for performance and payment: Nuremberg.

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To create that avoids the known disadvantages and is economical to produce xSt.

According to the invention, this object is essentially achieved with a centering ring of the type explained at the outset; that the outer diameter of the centering ring corresponds to the outer diameter the flange corresponds to the fact that a ring rim is provided that encompasses the edge of the plan and that the you ~ processing ring is arranged on the inner edge of the Zertrierringea.

Characterized in that the centering is routed according to the invention to the outside, ie, ent to the Aufiendurchmesser of the flanges - ζ are provided from the sealing surface to the vacuum space kaine Spaltraune more and the centering ring itself is located on the at mosphärenseite.

It is particularly beneficial. if the inner wall of the centering ring for receiving the sealing ring is concave.

Since the centering ring is no longer on the vacuum side, no high quality material is required. The centering according to the invention can therefore be carried out in an advantageous manner made of wrought aluminum alloy or free-cutting steel.

Further advantages and features of the invention are based on the drawing explained in more detail, which schematically represents an embodiment. It shows;

1 shows a flange connection according to the invention in Cut, and

Fig. 2 is a plan view.

The flange connection consists of two flange parts I ¹ , 1 ", each with molded flanges 2 ¹ and 2". The flange connection is encompassed by a clamping ring 6 which, in a manner known per se, presses the flanges 2 'and 2 "against one another with the aid of a screw 7. Between the flanges ^2r and 2" there is a centering ring:' 3, the outer diameter of which

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- ~ *> · - .: ..: .. Ring- ser according to the invention the Outside diameter of the flanges and or 2 "corresponds. Centering ring 3 is with a rand 5 provided, the Outside edges of the pool 2 ' 2 "includes.

The inner surface of the centering ring is j5, according to another Feature of the invention, concave and takes a sealing or O-ring 4 on. This sealing ring 4 consists in a manner known per se from a rubber elastic shoulder Material.

Since the outside diameter of the plansche 2 ', 2 "with two successive standardized nominal widths are the same, a centering ring according to the invention can be used for two Nominal diameter can be used. In the case of the known centering rings, which are on the inside of the facing connection work, a separate ring must be provided for each clear width will. The inventive training so that the spare parts and storage is simplified simplified.

The centering ring 3 with an annular rim 5 is preferably made made of wrought aluminum alloy or free cutting steel.

Another advantage is that when using the Flanged connection under excess pressure increases the sealing effect of the sealing ring 4, but at least keeps it the same is, while in the known centering with the outside; O-ring the O-ring under the Influence of the internal pressure can escape to the outside, so that the sealing effect is impaired.

The invention is not limited to the illustrated and described exemplary embodiment. It also includes everyone professional modifications as well as partial and sub-combinations of the features described and / or shown and measures.

- Expectations -

7244S01-U.73

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Claims (4)

Nuremberg, December 4th, 1972 17/55 claims 1.) Centering ring for flange connections in vacuum technology, with a rubber sealing ring, characterized in that the outer diameter of the centering ring (3) corresponds to the outer diameter of the flanges (2 ¹ , 2 "), that the edges of the flanges (2 ¹ , 2 ") encompassing ring edge (5) is provided, and that the sealing ring (4) is arranged on the inner edge of the centering ring (3). 2.) centering ring according to claim 1, characterized in that the inner wall (8) of the centering ring \ J>) for receiving the sealing ring (4) is concave. 3.) centering ring according to claim 1 or 2, characterized by the use of wrought aluminum alloy for the centering ring (3). 4.) centering ring according to claim 1 or 2, characterized in that the centering ring consists of free cutting steel.