DE2332642A1 - Flat plate valve slider - has obtuse angled edge to match V-shaped sealing strip in valve body - Google Patents

Abstract

A VEE-shaped sealing strip located in a groove in the valve body, is compressed by the edge of the valve slider plate when it is in the closed position. The seal form utilises the fluid pressure to increase its sealing capacity. The two sealing strips which are placed across the valve body for sealing the two opposite faces of the slider plate, have knife edge sealing lips so that the pressure medium can assist its sealing function. The inner sealing surfaces of the round gasket join each other at a blunt, sharp or right-angled, angle, although the former has shown itself to be particularly advantageous since it requires less preparation of the outward gliding surfaces of the even driver and a cutting effect is achieved upon the closing of the driver. By this means a locking of driver is not possible.

Description

52o2 Hennef, Sieg I ₁ June 22nd, 1973 My reference: PA 73

Applicant:

Hubertus Wehr

5223 Nümbrecht
Elsenroth

Patent application

Plate shut-off device

The invention relates to a Plattenabsperrorgan, preferably flat slide, with
an all-round seal and transverse seals.

The previously known all-round seals and transverse seals on plate shut-off devices have the
Disadvantage that they have to be readjusted after a certain operating time in order to ensure the desired sealing effect. In addition, the known all-round and transverse seals can only be used for low operating pressures
come.

The present invention therefore has the
The task is to improve the all-round seal and transverse seals in flat slide valves so that readjustment of the seals is no longer necessary and an absolute one at high pressures

509822/0016

There is a guarantee of tightness.

To solve this problem, it is proposed according to the invention that the all-round seal be on the inside the outer sliding surface of the flat slide is adapted and the transverse seals on their inside lying boundary edges are formed lip-shaped and with the lips on the end faces of the flat slide.

In the context of the invention it is also proposed that the inner sealing surfaces of the all-round seal run at an obtuse, acute, or right angle to each other.

The arrangement of the inner sealing surfaces under a blunt has proven to be particularly useful Angle proved because, on the one hand, little machining of the outer sliding surface of the flat slide is necessary and on the other hand a cutting effect due to the obtuse-angled outer sliding surface when closing the slide is achieved, so that through solids located in the medium flow jamming of the slide is not possible.

Instead of the sealing surface of the all-round seal running at an angle to one another, further Embodiment of the invention, these can also be made arcuate. This embodiment is at low pressures and low-viscosity media are used.

In order to enable simple production of the all-round seal with the greatest sealing effect, also proposed according to the invention, the outer sealing surfaces of the all-round seal in the

- 3 -

509822/0016

Adapt shape to that of the inner sealing surfaces.

Due to the special shape of the round seal and the corresponding design of the outer one The sliding surfaces of the slide valve ensure that the medium pressure increases the tightness with we'd brought in. With increasing medium pressure, the sealing effect of the all-round seal increases elevated.

The same applies to the transverse seal. With this seal, the aforementioned effect is achieved achieves that the outer surfaces of the lips at an obtuse angle with respect to the end faces of the flat slide run inclined.

In order to have the possibility of a preload for the transverse seal, the invention provides also suggest that the ends of the lips protrude beyond the base surface of the transverse seal.

The particular advantage of the invention is that the design of both the all-round seal as well as the transverse seal the possibility is created for the first time, the medium pressure for sealing to be used in addition. This creates the possibility of using the flat slide valve All-round and transverse seal according to the invention, too Safe to use at high medium pressures.

Based on the figures shown in the drawings, the invention is based on a Embodiment described in more detail.

509822/0016

Show it:

Figure 1 is a front view of an embodiment the invention;

FIG. 2 shows, in an enlarged illustration, a section along the line II-II in FIG. 1;

FIG. 3 shows, on an enlarged scale, a section along the line III-III in FIG.

The slide 3 is opposite the slide housing 12 by means of an all-round seal 1 and a transverse seal 4 sealed. As can be seen in particular from FIG. 3, the inner sealing surfaces are 8,8a of the all-round seal 1 arranged at an obtuse angle and the outer sliding surfaces 2 of the flat slide 3 adapted. The outer sealing surfaces 9,9a correspond to the all-round seal in their angular arrangement of those the inner sealing surfaces 8,8a.

The transverse seal 4 is formed lip-shaped on its inner delimiting edges 5, with the lips resting on the end face 6, 7 of the flat slide "5. The outer surfaces Io of the Lips are opposite the end faces 6.7 of the flat slide 3 at an obtuse angle inclined. The lips protrude beyond the base of the transverse seal. Between flat slide and housing l ^ a slide play I ^ is provided, which ensures that the slide from the medium pressure against the surfaces 8, respectively. 8a the All-round seal 1 and 5 is pressed against the lips. The movement of the slide can by means of a handwheel or hydraulically, pneumatically or electromagnetically.

509822/0016

Claims (6)

■ S Expectations .) Plate shut-off device, preferably a flat gate valve with an all-round seal and transverse seals, characterized in that the all-round seal (1) inside the outer sliding surface (2) of the flat slide (3) is adapted and the transverse seals (4) on their inner delimiting edges (5) are lip-shaped and with the Lips lie against the end faces (6,7) of the flat slide (3). 2.) Plattenabsperrorgan according to claim 1, characterized in that that the inner sealing surfaces (8,8a) of the all-round seal (l) under a blunt, pointed or at right angles to each other. 3.) Plattenabsperrorgan according to claim 1, characterized in that that the inner sealing surfaces (8,8a) of the all-round seal (l) are arcuate. 4.) Plattenabsperrorgan according to claims 1 to 3, characterized in, that the outer sealing surfaces (9,9a) of the all-round seal (1) in the shape of the inner Sealing surfaces (8,8a) correspond. 509822/0016 5.) Plattenabsperrorgan according to claims 1 to 4, characterized in that that the outer surfaces (lo) of the lips at an obtuse angle with respect to the end faces (6,7) of the flat slide (3) are inclined. 6.) Plattenabsperrorgan according to claims 1 to 5, characterized in that that the ends of the lips protrude beyond the base surface (11) of the transverse seal (4). 509822 / ÜÜ16