Sealing diaphragm and check valve having a sealing diaphragm for fluid technology applications

Abstract

The invention relates to a sealing diaphragm (1) and a check valve (9) comprising a sealing diaphragm (1) for fluid technology applications. A sealing diaphragm (1) for fluid technology applications is to be provided, which is economical and constructionally simple to produce, which can be used as a closing means for a check valve (9) and with which unwanted interfering noise can be prevented during operation. The object of the invention is achieved by a sealing diaphragm (1) with a flat, flexible sealing section, which can be bent or curved with a fluid pressure, wherein at least one resilient frictional tooth (4) is provided on or next to the surface of the sealing section at a distance from an edge of the sealing section, designed and arranged in such a way that it forms an angle between 30 degrees and 150 degrees with the sealing section and it tilts together with the bending or curving movement of the flat sealing section, wherein the frictional tooth has a contact surface (7) on a side orientated in the tilting direction. The object of the invention is also achieved by a check valve (9) for fluid technology outlet openings, comprising a housing part (10) having a fluid outlet (12), wherein an above-mentioned sealing diaphragm (1) is arranged in the flow path of the outlet opening, which is in contact with a sealing surface of a seal seat with a sealing section against the direction of flow and which can be bent or curved with a fluid pressure in the flow direction, wherein the contact surface (7) of the at least one frictional tooth (4) is simultaneously in contact with a corresponding bearing surface.

Description

technical field [0001] The invention relates to a sealing membrane and a non-return valve with a sealing membrane for fluid technology applications. Background technique [0002] For simple control tasks, the use of non-return valves is known in the prior art fluid technology. Check valves are often used for direction determination in fluid technology applications in that they allow the flow of fluids (liquids, gases) in only one direction. Generally speaking, the closing element is released in the flow direction by the pressure of the flowing fluid, whereas it is automatically blocked in the opposite direction (for example caused by the return force of a spring, gravity or the fluid pressure on the outflow side). It is also known to use a sealing membrane element made of an elastically deformable material (for example an elastomer) as the closure element. In this case, the membrane component can, for example, form a shut-off flap which, in the flow path, rests elastically...

AI Technical Summary

Problems solved by technology

The solution proposed by DE 10 2009 018 930 A1 is disadvantageous in this respect if the possible flow cross section is reduced fundamentally due to the stop limitation

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