DE102010060337A1 - Non-return valve, has valve body resting upon housing-fixed seal seat with sealing element in closed position, where sealing element is fixed at valve body by clamping part that is formed by clamping ring - Google Patents

Abstract

The valve (1) has a rotationally symmetrical valve body (3) movably arranged between an open position and a closed position in a valve housing (2), where the valve body is prestressed by a return spring (4). The valve body rests upon a housing-fixed seal seat (6) with a sealing element (5), in the closed position. The sealing element is fixed at the valve body by a clamping part. The clamping part is formed by a clamping ring (9). The clamping part is connected with a retaining dowel (7) of the valve body in a force-fit manner.

Description

The invention relates to a check valve with a valve housing, in which a biased in particular by a return spring valve body is slidably disposed between an open and a closed position, wherein the preferably rotationally symmetrical valve body rests in its closed position with a sealing element on a housing-tight sealing seat.

From the EP 0 573 865 A1 a check valve with a valve housing is known in which a valve body is mounted axially displaceable, wherein the valve body is held by a spring in a closed position. The valve body has a sealing element which is attached to a projecting threaded bolt via a nut and a retaining plate. The sealing device rests in the closed position on a sealing seat formed by the valve housing.

The disadvantage is that the check valve takes up a relatively large amount of space and has a comparatively high number of individual parts. Furthermore, the production of the items is relatively expensive.

The object of the invention is to avoid these disadvantages and to provide a compact with little effort and small number to be produced compact check valve.

According to the invention this is achieved in that the sealing element is attached via a clamping part on the valve body, wherein preferably the valve body has at least one retaining element penetrating the sealing element, wherein preferably the retaining pin is arranged concentrically to the axis of symmetry of the valve body, and that the clamping part is secured to the pin.

It is particularly advantageous if the clamping part is formed by a clamping ring, wherein preferably the clamping part consists of an elastic material, preferably made of spring steel.

In a further embodiment it can be provided that the clamping part has teeth projecting in an outer and / or inner edge region, and wherein particularly preferably the teeth are formed by the valve body groundbreaking, wherein preferably the teeth with a normal plane on the axis of symmetry form an angle, which angle preferably <60 °, particularly preferably <30 °.

The clamping part is preferably made of an elastic material, particularly preferably spring steel.

Furthermore, it can be provided in the context of the invention that the valve body has at least one substantially parallel to the retaining pin, the sealing element penetrating guide pin, and that the clamping part has corresponding recesses in the region of the guide pin.

The fact that the clamping part is formed by a clamping ring made of spring steel or sheet steel, construction volume and weight can be saved. The clamping ring assumes the function of a retaining plate for the sealing element and ensures a secure attachment of the sealing device on the valve body on the clamping acting teeth.

The production of the check valve is very simple, since the sealing device is placed in a single manufacturing step together with the clamping ring on the valve body. The wegstehende teeth act self-locking against the mounting direction, so that unintentional release of the sealing device is reliably prevented.

The invention will be explained in more detail below with reference to FIGS. Show it:

1 an inventive check valve in a longitudinal section in a closed position;

2 the check valve in a longitudinal section in an open position;

3 a valve body of the check valve in an oblique view;

4 the valve body in an end view;

5 the valve body in a longitudinal section; and

6 the valve body in an exploded view.

1 shows the check valve 1 in a closed and 2 in an open position. The arrows S indicate the direction of flow of the medium when the check valve is open.

The check valve 1 has a valve housing 2 in which a valve body 3 is slidably mounted between an open position and a closed position. The valve body 3 is doing by a return spring 4 biased in the direction of the closed position. In the closed position is a fixed to the valve body 3 connected sealing element 5 against a housing-tight sealing seat 6 pressed. The valve body 3 has a central, concentric to the rotationally symmetrical valve body 3 arranged holding pin 7 on which the sealing element 5 penetrates. With reference number 8th are centering pins, which in corresponding openings 8a of the sealing element 5 intervention.

The sealing element 5 is through a clamping ring 9 on the retaining pin 7 held. The existing example of spring steel clamping ring 9 has a number of teeth in the region of its inner diameter facing the holding pin, which of the sealing element 5 are averted and which with a normal plane ε on the axis of symmetry 3 ' span an angle α <30 °. This will cause a self-locking effect of the teeth 10 in relation to the retaining pin 7 ensures which unintentional release of the on the retaining pin 7 deferred clamping ring 9 reliably prevented.

For axial guidance of the valve body 3 are in the edge area guide pin 11 provided, which the sealing element 5 in openings 11a penetrate. In the area of the guide pin 11 has the clamping ring 9 recesses 11b on.

The use of a clamping ring 9 for fastening the sealing element 5 allows a simple and inexpensive production of the check valve 1 and enables a compact and space-saving design.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0573865 A1 [0002]

Claims (8)

Check valve ( 1 ) with a valve housing ( 2 ), in which a particular by a return spring ( 4 ) prestressed valve body ( 3 ) is slidably disposed between an open and a closed position, wherein the preferably rotationally symmetrical valve body ( 3 ) in its closed position with a sealing element ( 5 ) on a housing-tight sealing seat ( 6 ) rests, characterized in that the sealing element ( 5 ) via a clamping part on the valve body ( 3 ) is attached. Check valve ( 1 ) according to claim 1, characterized in that the valve body ( 3 ) at least one the sealing element ( 5 ) penetrating retaining pin ( 7 ), wherein preferably the retaining pin ( 7 ) concentric with an axis of symmetry ( 3 ' ) of the valve body ( 3 ) is arranged, and that the clamping part on the retaining pin ( 7 ) is attached. Check valve ( 1 ) according to claim 1 or 2, characterized in that the clamping part by a clamping ring ( 9 ) is formed. Check valve ( 1 ) according to claim 2 or 3, characterized in that the clamping part frictionally with the retaining pin ( 7 ) connected is. Check valve ( 1 ) according to one of claims 2 to 4, characterized in that the clamping part consists of an elastic material, preferably made of spring steel. Check valve ( 1 ) according to one of claims 1 to 5, characterized in that the clamping part in an outer and / or inner edge region protruding teeth ( 10 ), wherein preferably the teeth ( 10 ) from the valve body ( 3 ) are groundbreaking. Check valve ( 1 ) according to claim 6, characterized in that the teeth ( 10 ) with a normal plane (ε) on the symmetry axis ( 3 ' ) span an angle (α), which angle (α) is preferably <60 °, particularly preferably <30 °. Check valve ( 1 ) according to one of claims 1 to 7, characterized in that the valve body ( 3 ) at least one substantially parallel to the retaining pin ( 7 ), the sealing element ( 5 ) penetrating guide pin ( 11 ), and that the clamping part in the region of the guide pin ( 11 ) corresponding recesses ( 11b ) having.

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