PL87659B1 - - Google Patents

Description

The subject of the invention is a check valve with a plate placed in a housing and situated centrally between the guide ribs. There are known check valves in which a stop plate is mounted between the guide ribs in the valve housing. The thrust bearing plates in the known valves are, for reasons of cost, stamped from sheet metal and therefore the accuracy of the dimension of their outer diameter is not sufficiently satisfactory to be able to fit tightly between the guide ribs. It has also been found that during the movement, due to the oblique impact of the valve plate against the thrust plate, the bearing plate is subjected to radial forces which cause abrasion on the periphery of the relatively thin thrust bearing plate within the guide ribs. Such a system also has the disadvantage that it counteracts the permanent deposition of the thrust bearing plate. Due to the chemical resistance, austenitic steel is used instead of spring steel, but these steels have the disadvantage that they are susceptible to fatigue, and therefore the wasp is not protected. The retaining ring. An object of the invention is to remedy these drawbacks. In order to achieve this goal, it has been decided, according to the invention, to make a valve in which the ring and the thrust bearing plate are positioned in such a way as to protect against abrasion and damage during operation. The adjusting ring is independent of its own tension, as a result of which the bearing plate adjacent to the axial band is forcibly stretched and held in the grooves. Thereby the position of the bearing plate is fixed. Since the periphery of the thrust bearing plate rests against the axial band, the specific surface pressure on the periphery caused by the radial forces is much lower. As a result, the loads do not cause any deformation or abrasion of the supporting bearing plate. The surface pressure between the adjusting ring and the guide ribs can be kept relatively low by the use of a selected height, the object of the invention is shown in the embodiment example in the drawing, where Fig. 1 shows the check valve in cross-section and Fig. 2. check valve in top view. In the housing 1 of the check valve, a seat 2 is provided for an axial-lifting valve plate 3, the housing 1 having four axial ribs 4 for the valve plate 3. The valve plate is pressed by the spring 5 towards the seat 2. The end of the spring rests on a zebra *. the bearing plate 6. The retaining ring 8, which extends radially into the grooves 7, the ribs 87 6593 87 659 4 fixes the bearing plate 6 in its position in the valve housing 1. on the outside is a thrust bearing plate 6 which rests against the inner wall of the axial band. The inner diameter of the band 9 fits between the guide ribs 4. The bearing plate 6 is made in the form of a washer with a radial cut 10 extending through the opening to the outer edge 10 of the washer. The bearing plate 6 is dimensioned such that, in the relaxed state, its outer diameter is by a certain value greater than the inner diameter of the band 9 of the inserted retaining ring 8. The retaining ring 8 15 is therefore held in the grooves 7 not only by its severity. resilient force, but is additionally pressed by a thrust bearing plate 6 pressing from the inside against the axial clamping ring 9. In this way, the retaining ring 8 and the bearing plate 6 are securely positioned in the valve housing 1. The bearing plate 6 has a central recess 11 which encloses the spring 5, the depth of which is equal to or greater than that of the valve. spring 5 in a compressed state. In this way, the valve plate 3 creates a bump stop in its upper position in the bearing plate 6. valve plate. In this arrangement, the bearing plate 6 rests on its entire circumference to the axial band 9 of the locating ring 8. The radial surface pressure is therefore kept at a low level, avoiding plastic deformation at the same time. spring pressure on the bearing support plate 6. 40 PL PL

Claims (7)

1. Claims 1. A check valve with a valve plate guided through the ribs of the housing, with the spring pressing the valve plate towards the seat in the valve housing, a bearing plate located centrally between the guide ribs on which the spring rests and the open ring positioning radially resilient in the guide ribs, on which the part protruding inwards through the edge of the groove rests axially the bearing edge plate of the front side area facing away from the spring, characterized in that the retaining ring (8) is relatively the bearing plate (6) has an additional cylindrical surface and the additional surface of the ring (8) abuts the existing surface of the cylindrical plate (6), radially expanding the ring (8). 2. A check valve according to claim A device as claimed in claim 1, characterized in that the ring (8) comprises an axial band (9) encircling the radial support plate (6), against which the inner wall forming an additional cylindrical wall abuts the bearing support plate (6) with its surface housing. 3. A check valve according to claim The method of claim 1, characterized in that the inside diameter of the axial band (9) is equal to the clearance of the guide ribs (4). 4. • 4. A check valve according to claim The method of claim 1, wherein the bearing plate (6) is radially formed as a washer with a radial cutout (10) extending from the opening to the outer edge of the washer. 5. A check valve according to claim A device as claimed in claim 1, characterized in that the bearing plate (6) is made in the form of a spring-biasing lift stop for the valve plate (3). 6. A check valve according to claim A method as claimed in claim 1, characterized in that the bearing plate (6) is curved in the direction of the axial-lift plate (3). 7. A check valve according to claim The method of claim 1, characterized in that the thrust bearing plate (6) comprises a central recess (11) for the seat of the spring (5). Fig. 1 8 11 6 4 Fig. 2 EN