DE2258642C2 - check valve - Google Patents

Description

In a known check valve (German utility model 1 669 183) it has been found to be disadvantageous that the abutment plate could not be arranged in a secure manner between the guide ribs in the valve housing. For reasons of cost, the abutment plates are preferably made as stamped parts from sheet metal, and their outer diameter therefore cannot always be adhered to with sufficient accuracy in order to be able to insert them with a press fit between the guide ribs. It was also observed that during operation, when the valve plate hits the abutment plate at an angle, the latter is loaded by radially directed forces, which in the area of the guide ribs lead to wear on the periphery of the relatively thin wide bearing plate opposite. Finally, with consideration of the chemical resistance, in many cases instead of a so-called spring chair for the retaining ring z. B. use a uustcnitischer material zn. These materials do not tire, which means that a secure fit of the retaining ring is not guaranteed either.

The invention specified in claim i is based on the object .in the non-return valve mentioned To create a way in which the Hallering and the abutment plate are securely arranged and are largely protected against wear and damage during operation, which is special can find advantageous according to claim 2 execution.

When using the teaching according to the invention, the retaining ring is independent of its internal stress forcibly spread apart by the abutment plate resting on the axial collar and therefore safe held in the grooves. In this way, however, the abutment plate is also fixed in a secure manner. As the abutment plate rests against the axial collar over its entire circumference, is that caused by radial forces Surface pressure on the circumference is now specifically significantly lower. This causes this

loads no more deformation or wear on the abutment plate. The specific one Surface pressure between the retaining ring and the guide ribs can be achieved by the corresponding ring height be kept sufficiently low.

By developing the invention according to claim 4, a particularly tight fit is achieved, and in addition, diameter tolerances can be easily compensated.

The particularly advantageous other development

♦ 0 according to claim 5 also results in attenuation the impact of the valve plate on the abutment plate, which also has a wear-reducing effect. Here, the abutment plate, designed as a disc spring, also generates a fixed one Additional radial force that improves the fit of the retaining ring.

In the drawing, an embodiment of the EifipHimosgegenctandes is shown. It shows
F i g. 1 the check valve in cross section and

F i g. 2 the check valve in plan view.

In the housing 1 of the check valve, a seat 2 is provided for the valve plate 3 , which can be axially lifted, and the housing 1 also has four axial guide ribs 4 for the valve plate 3. The latter is also loaded by a spring 5 in the direction of the seat 2. The free spring end is supported on an abutment plate ti inserted centrally between the guide ribs 4 and designed as a stamped sheet metal part. An open one, in grooves 7 of the

Guide ribs 4 of radially resiliently engaging retaining rings in turn fix the abutment plate 6 in its installation position in the valve housing 1.

For this purpose, the retaining ring has an axial collar 9 surrounding the abutment plate 6 radially on the outside, on the inner wall of the abutment plate 6 rests firmly with its peripheral surface. The inside diameter of the collar 9 in the final installed state corresponds essentially to the clear distance between the guide

2 268

ii; acsrippeii4, what is particularly bdastungMechnische Brings benefits. Furthermore, is the counter-kigerphitte 6 radi; tl resiliently as a perforated disc with a circular dial extending all the way from the perforated / around SchcibcnauUU ! 0 trained. The abutment pack 6 is specially dimensioned so that it is relaxed Condition in the outer diameter by a predetermined amount Measure is greater than the inner diameter of the Federal 9 of the inserted retaining ring 8.

The retaining ring 8 is only light through his own spring force held in the grooves 7, but also by the spring force from the inside Against the axial collar 9 of the ring pressing against-Sage rplatie 6 6 arranged securely in the valve housing 1.

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1 sheet of drawings

Claims (7)

Patent claims: ! Check valve with eiuer by C.ehüuserippc-n guided Ventüplalle, one the valve plate in the direction of the seat in the Veniiigehau.se loaded spring, a centrally disordered abutment plate between the guide ribs, on which the spring is supported with its free end, and an open one, in grooves of the guide ribs radially resiliently engaging retaining ring, on the part of which protrudes over the edge of the groove towards the center, the abutment plate with the The edge zone of its end face facing away from the spring rests axially in a supportive manner, characterized in that that the retaining ring (8) or the abutment plate (6) has an additional cylinder surface and that the additional cylinder surface of one part (8 or 6) on an existing cylinder surface of the other part (6 or 8), the retaining ring (8) spreading radially apart, rests. 2. Check valve according to claim I, characterized in that the retaining ring (8) has a Has abutment plate (6) radially surrounding axial collar (9), on its as an additional cylinder wall serving inner wall, the abutment plate (6) rests with its peripheral surface. 3. Check valve according to claim 1 and 2. gekei..izeichnet characterized in that the inner diameter of the axial collar (9) corresponds to the clearance between the guide ribs (4). 4. Check valve according to one) or more of the preceding claims, characterized in that that the abutment plate (6) as a perforated disc with a hole from the outer edge of the disc to the outer edge of the disc Reaching radial slot (10) is designed to be radially resilient. 5. Check valve according to one or more of the preceding claims, characterized in that that the abutment plate (6) acts as a resilient stroke stop for the valve plate (3) is trained. 6. Check valve according to one or more of the preceding claims, characterized in that that the abutment plate (6) is arched convexly towards the valve seat plate (3). 7. Check valve according to one or more of the preceding claims, characterized in that that the abutment plate (6) has a central cup-shaped recess (II) for receiving the spring (5).