FI102562B - Sealing device for distribution disc valve - Google Patents

Description

5 102562 *

Sealing device for manifold valve Tätningsanordning för fördelningsskivventil

The present invention relates to a sealing means for a manifold valve, comprising: a) at least one seal; (b) at least two through-openings for the fluid, which are sealed to each other and outwards by means of this seal; (C) a chamber structure of rigid material against which the seal rests on both sides for stabilization and over which the seal extends a specified distance.

Various embodiments of such sealing means are known from DE-OS 35 09 610. In one embodiment, the seal is placed in a groove in the rigid washer, whereby the groove of the groove can be considered to form a "chambering structure" over which the seal is spaced a certain distance. extends. DE-OS 35 09 610 discloses an embodiment in which *: · the seal rests along its outer surface against the outer surface of a notch 25 in a rigid washer, the inner sides of the sealing areas themselves being stabilized by form rings made of rigid materials. The main purpose of DE-OS 35 09 610 is to avoid • · * ..! with the least possible design of the notch in the rigid washer • »· use of rigid additional form rings on the inside of the seal.

..li '30' ·· 'Similar sealing means are also known from DE-OS 29 29 199 or DE-OS 28 56 028.

102562 2 In all these cases, the chamber structure of the seal is the same everywhere, so that the seal extends the same distance everywhere over the chamber structure. Since the hardness of the seal is substantially in accordance with the extrusion operation, it becomes relatively rigid as a whole. This means that in order to achieve the sealing effect of the manifolds, a large total force is applied to the seal or vice versa from the seal to the manifolds. This high axial compressive force of the distributor discs is reflected as a correspondingly high frictional force in the mutual movement of the distributor plates, which interferes with the operating comfort.

10

The object of the present invention is to design a sealing means as described above in such a way that the driving forces required for the movement of the manifolds relative to each other are reduced.

This object is achieved according to the invention in that d) the chamber structure of the seal in those parts where the seal is located between the two through-openings is higher than in the other parts.

The invention is based on the finding that the seal does not need the same strong chambering structure in all parts. The seal is particularly susceptible to deflection at the \\ points where it is located between two • · * * · * through-holes for the fluid. These points are affected by the largest pressure differences. However, the side loads acting on the seal are quite small at those points where the seal takes care of "only" the seal outwards. According to the invention, the chamber structure is thus adapted to the respective locally varying * <. · Stabilization needs. that the seal can extend beyond the axial compression pressure, thus reducing the stiffness of the entire seal, which also reduces the total force required for seal operation 3 102562. and finally, the force required to move the baffles is also reduced.The lower driving force increases the comfort of use and facilitates, in particular, the fine adjustment of the amount and / or temperature of the outflowing water in sanitary appliances.

5

According to an embodiment of the invention, the chamber structure is formed by means of walls of different heights of the groove made in the rigid washer, the seal resting against this groove. The height of the bottom of the groove is then, of course, the same everywhere, in which case the seal leaning against this bottom is supported in different parts at different heights by means of the walls of the groove.

In a particularly preferred embodiment of the invention, the chamber structure is formed on the outside of the seal by a wall of a notch in the rigid washer and on the opposite side by means of at least one annular region 15 of the rigid support. The seal can then extend through the entire washer. The question then is the so-called a "floating" seal, in which case the position of the seal can be freely adjusted with respect to the washer within certain limits. The seal then becomes compressed only when the sealing means is installed together with the distribution discs (which can be: placed in the cartridges) in the actual external device housing.

20

From a manufacturing point of view, it is particularly simple that the side of the chamber structure formed by the rigid washer is equally high everywhere, while the side of the chamber structure formed by the support is again different in height.

25 ... The sealing means described in this connection can be used as seals comprising at least two •% * ·; * closed areas. In this case, it is recommended to use an embodiment of the invention in which the support is provided with a number of annular areas 30 connected to each other in one piece by means of spacers.

* The rigid support thus forms an integral part in this embodiment.

4 102562

When using such an embodiment of the support, the sealing unit can be manufactured by injecting the seal around the support in such a way that it encloses the intermediate parts, whereby a form-rigid connection is formed between the seal and the support. This sealing unit can then be placed in its entirety as a "floating" seal in the corresponding notch of the rigid washer.

An embodiment of the invention will now be described in more detail with reference to the accompanying drawings, in which: Figure 1 is a bottom view of a sealing means for a manifold mixing valve;

Figure 2 shows a washer of the sealing means according to Figure 1; Fig. 3 shows a sealing unit of the sealing means according to Fig. 1;

Fig. 4 shows a section taken along the line IV-IV in Fig. 3;

Fig. 5 shows a section taken along the line V-V in Fig. 3.

20

The drawings show the sealing gap for the manifold mixing valve. Figure 1 shows this sealing means in its entirety, while Figures 2-5: V: again show the individual parts contained in the sealing means. The sealing means may be formed in connection with the cartridge-like structure of the valve as a one-piece piece or as a bottom part of the cartridge housing, or with the valve structure being different from the cartridge-like separate part. In any case, the «· *: contained in this sealing means. * the function of the sealing unit 2 is to form a watertight transition part between the mouth openings of the water-conducting channels in the interface of the external housing (not shown) and the through openings of the fixed distribution disc (also not shown) in a manner known per se.

The sealing means comprises two main components: a washer 1 (Fig. 2) and a sealing unit 2 (Fig. 3).

A substantially circular washer 1 made of a rigid material, preferably plastic, is fixedly placed in a device housing not shown in the figure. Its correct orientation 5 is aided by a downwardly extending set pin 4. The three circumferential notches 5, 6,7 allow the washer 1 to be non-rotatably attached to the cylindrical wall of the carton housing which receives the adjusting dividing discs and / or to the wall of the device housing receiving space. The washer 1 is provided with a single continuous through-opening 8, the outline of which corresponds to the shape of the sealing unit 10 2 received by it.

The sealing unit 2 shown in Fig. 3 comprises an actual seal 20 made of a soft elastomeric material, which is sprayed form-rigidly around the support 30 as described below, which in turn is made of a rigid material, preferably plastic, like a washer 1.

The seal 20 is one-piece and comprises two symmetrical loops 12,13 connected together by an intermediate part 15 and a relatively large shell arc 14 running approximately tangentially in the outer region of the loops 12,13.

• 20: · Inside the loops 12,13, in the plan view, there are oval-shaped areas 31,32 of the support 30, which support the loops 12,13 from the inside. Water passage openings 9,10 are formed in both areas 31, 32, which taper in the direction of water flow. In Fig. 1, the sealing means is shown from below as the water flow direction then extends inwards from the plane of the drawing. When using a manifold mixing valve, cold water passes through one of the inlets 9 and warm water passes through the other inlet 10.

• · · I »·

The two annular regions 31,32 of the support 30 are connected via short: ... 30 connecting spacers 33,34 also to an approximately annular region 35 of the support 30, which rests against the inside of the loop arc 14 and partly against the outside of the loops 12,13. The area of the support 30 limits the relatively large area of the flow opening 11 through which the returning mixing water controlled by the manifolds flows.

The sealing unit 2 passes completely through the washer 1. It is therefore not located in the stabilizing groove of the washer 1 5, but rests directly at the bottom on the interface of the housing and at the bottom on the underside of the fixed distribution disc. In such a seal, the mixing discs of the mixing valve reach their required compression pressure for final use only after installation in the (external) housing, even when placed in the cartridge housing.

10

Of particular interest is the manner in which the various regions of the seal 20 are stabilized outwardly and relative to each other for the water pressure prevailing therein.

The seal 20 is placed in support contact against the interface 8 of the washer 1. To that extent, the seal 20 described in this connection does not differ from the seal described in the above-mentioned patent publication DE-OS 35 09 610.

. . Sealing "inwards" instead takes place in the same way as in the application described in DE-OS 35 09 610, in which such seals are stabilized by means of three setting rings. The annular areas 31, 32 and 35 of the support 30 correspond to such rings, this time in one piece, connected to each other by means of intermediate parts: 33,34. However, a special feature is the regions 31,: T; 32 and 35, as is particularly apparent from Figure 4. It can be seen from this figure that the inwardly extending portion of the region 31 of the support 30, which is opposite the region 32 on the one hand and the region 35 on the other hand, has a greater axial height than the outwardly projecting region. The area 32 of the bracket 30 is made mirror-symmetrical.

«· · • I · • · ·. The region 35 of the support 30, in turn, is provided with a higher height in its part '· 30 facing the regions 31 and 32. The seal 20 is, as can be seen in Figure 4, higher in all respects than the support 30, however, at points where possible water flow between the two passages 9,10 or 11, respectively, is to be avoided, this height is lower at the support 30 than in the other parts. In this way, it is ensured that the seal 20 is particularly well supported, i.e. "chambered", on both sides in the parts under the maximum pressure load. The seal 20 then becomes particularly rigid. If the "chambering" were so considerable in all parts of the tii-5 seal 20, the overall stiffness of the seal 20 would be obtained, in which case the mixing discs of the mixing valve would have to be subjected to a rather high axial force in order to achieve the required sealing effect. However, such large axial forces are not desirable due to the frictional forces acting between the manifolds, which result in rather large driving forces.

For these reasons, in the present sealing means, the seal 20 is not so significantly "chambered" in parts where a particularly good support is not required. In these parts, the seal 20 remains "softer", being able to yield laterally. In this way, the total force with which the sealing unit 2 has to be compressed in order to achieve a sealing effect can be clearly reduced, which advantageously affects the driving forces of the mixing discs of the mixing valve.

* · • · • · · • · · · * • · • «• · •« · · · ·

Claims (6)

A sealing device for a distribution disc valve comprising: a) at least one seal (20); b) at least two passage openings (9,10,11) for a liquid medium which are sealed between themselves and sealed by means of this seal (20); C) a chamber structure (1.30) made of rigid material, against which the seal (20) abuts on both sides for stabilization and over which the seal (20) extends a certain of the stand, characterized in that the d) chamber structure ( 1.30) for the seal (20) in the portions where the seal (20) lies between two passage openings (9,10,11) is higher than in the other portions. Sealing device according to claim 1, characterized in that the chamber structure is formed by means of various high walls of a latch accommodated in a rigid base plate, the sealing being placed in this latch. I «• · · • · · Sealing device according to claim 1, characterized in that the chamber structure (1,30) on the outer side of the seal (20) is formed by means of a wall of a recess (8) in a rigid base plate (1) and on the opposite side by means of at least one annular region (31,32,35) of a rigid carrier (30). • · · • · · • i1 Sealing device according to claim 3, characterized in that the side of the chamber structure formed by means of the rigid base plate (1) 30 is equally high everywhere, while the side of the chamber structure which is supported by the support (30) is different. 11 102562 Sealing device according to claim 1, in which the sealing comprises at least two enclosed areas, characterized in that the carrier (30) is provided with a number corresponding to the number of closed areas (11,12,13) of the sealing (20). annular regions (31,32,35) which are connected to one another by means of intermediate parts (33,34). Sealing device according to claim 5, characterized in that the seal (20) is sprayed around the carrier (30) in such a way that it encloses the intermediate members (33, 34), forming a rigid connection between the seal 10 (20) and the carrier. (30). • • • • • • • • • • • • • • • • • • • • • • i · 1 · · · · • · ·