DE1703335U - SPREAD SEAL. - Google Patents

Description

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Friedrich Goetze A.-G.

Expansion seal

The object of the innovation is an expanding seal for stuffing boxes, Piston rods or the like.

Bs is already known, the sight lips of cuff seals by means of elastic hangers against the surfaces to be sealed press; the expansion rings were mostly oval shaped. If against very high temperatures, against aggressive chemicals or the like. should be sealed, as is often the case with the sealing of drilling is the case, have to replace elastic cuffs in many cases those made of hard materials are used, which, however, require a correspondingly higher price pressure.

It is also known to use such flange seals made of semi-elastic or inelastic plastics, 2.B. Produce polyfluoroethylene, but mostly su oteif sine ani. whose & eilformige expansion rings exert a very high pressure on the pipe wall, which 2.B. with carbon or other fragile pipes often leads to destruction.

Keuerungεgemaß is proposed that the cuff of Spreizdichtungen unlike below the Disher usual comments in the sealing lips and / or back with the "elasticity-enhancing grooves or recesses z \ provided x. This expansion joints facilitate apart strut η goose much \ ιηά require much lower expansion pressure , rock spreading agents preferably use rubber rings

or other rings with a round cross-section made of highly elastic Merkstoff used. Γ-ie porn of these rings also effects as a result their line contact on the inner part of the cuff surface a slight spreading apart and tight fit of the lips.

In this way, it is possible to use materials that are inherently less elastic like polyfluoroethylene with a low spread already for Bring waterproofing. It is also possible to use such spread seals "Lay them on top of each other and daE.it a spreading effect against each other to achieve. It is advantageous if, in the case of the cuffs arranged one behind the other, the expanding ring of a cuff rests in the back groove of the next cuff. Preferably lies the elastic material, e.g. rubber existing expansion ring between the eyesight lips of one cuff and engages in the ß'JCKenausschnitt the other cuff te, whereby the whole system is also designed to be elastic in the axial direction. This combination has proven itself in sealing foal pipes against hot steam or chemicals at high temperatures.

The drawing shows the innovation in an exemplary embodiment shown.

L> as pipe 1 «is opposite the. Housing 2 sealed by the sleeves 3 »4. The light lips of the cuffs 3 - 4 are pressed by the snap rings 5, 6 on the one hand against the tube 1 and on the other hand against the housing 2. A locking ring is provided in an axial view, in dec; the round rubber ring 6 abuts, and a screw plug 8 is used to keep the cuffs under tension.

Claims (5)

Protection claims ) Expanding seal aas one or more, each with an expanding ring on spread. Cuffs made of materials, especially plastics, of low elasticity such as polyfluoroethylene, thereby marked as £ in: sealing lip and / or back part the sleeve elasticity-increasing grooves or recesses are provided. :.) Expanding seal according to claim 1, characterized in that the expanding ring is an elastic ring or other sin ^ with a round cross-section and made of highly elastic u; - pigments are used. 5.) Expanding seal according to speeches 1 and 2 with several cuffs, characterized in that Dei the cuffs arranged one behind the other, the expansion ring of a cuff in the back groove aer the next cuff rests. βοετζε public company