MEMBRANVENTILANORDNUNG

Description

[0001] The invention relates to a diaphragm valve arrangement, for example in a valve device of an anti-lock braking system of a motor vehicle, comprising a disc-shaped valve diaphragm made of an elastic material and a disc with a central opening, wherein the valve diaphragm is arranged with one of its two sides on the disc, wherein the valve diaphragm has a circumferential sealing bead radially on the outside on its side remote from the disc, wherein the disc is arranged together with the valve diaphragm between an upper housing part and a lower housing part of the diaphragm valve arrangement, and in which the sealing bead is clamped between the upper housing part and the lower housing part.

[0002] Such a diaphragm valve assembly is known from DE 21 36 446 A1. The sealing bead is accommodated in an annular groove formed by an upper and lower housing sections. The sealing diaphragm is supported by a disc between the upper and lower housing sections up to its outer edge. The sealing bead of the sealing diaphragm is formed on the side facing away from the disc and completely fills the annular groove.The machining tolerances during the production of the annular groove mean that the sealing bead is clamped in the annular groove in the desired manner with a predetermined clamping force, which is exactly right for a permanent sealing effect and does not lead to hardening of the elastic material of the sealing membrane. However, it can also happen that the sealing effect is insufficient or that the sealing bead is pressed too strongly by the clamping force and suffers hardening in continuous operation, damaging the sealing membrane.

[0003] WO2010 / 012425 relates to a diaphragm valve with an elastomer diaphragm for actuating a closure member of a valve seat, which diaphragm is arranged between a valve housing and a housing cover via an outer radial sealing bead and can be acted upon by a control pressure chamber formed on the side of the housing cover, which control pressure chamber is provided with a curved support contour against which the upper diaphragm surface of the elastomer diaphragm comes into flat contact when the closure member is in the open state.

[0004] EP1408389 relates to a pressure control valve which keeps a fluid pressure on the downstream flow side the same as the fluid pressure on the upstream flow side.

[0005] DE2713599 relates to fluid pumps and, in particular, pumps operating with a flexible diaphragm which can effectively convey either liquids or gases.

[0006] DE 19638965 relates to a fluid-operated diaphragm valve in which at least one circular valve seat is arranged within a housing, which can be actuated by a diaphragm-like actuating element to open or close the valve seat.

[0007] Against this background, the invention is based on the object of proposing a diaphragm valve arrangement in which the sealing effect in the area of ​​the sealing bead is improved largely independently of manufacturing tolerances and the acting clamping force.

[0008] This problem is solved by a diaphragm valve arrangement having the features of claim 1. The scope of protection of the patent should be decided with the support of the wording of the claim.

[0009] Accordingly, the invention is based on a diaphragm valve arrangement, for example in a valve device of an anti-lock braking system of a motor vehicle, comprising a disc-shaped valve diaphragm made of an elastic material and a disc with a central opening, wherein the valve diaphragm is arranged with one of its two sides on the disc, wherein the valve diaphragm has a circumferential sealing bead radially on the outside on its side remote from the disc, wherein the disc is arranged together with the valve diaphragm between an upper housing part and a lower housing part of the diaphragm valve arrangement, and in which the sealing bead is clamped between the upper housing part and the lower housing part.In this diaphragm valve arrangement, in order to achieve the stated object, additional sealing arrangements are provided on the upper housing part and / or on the lower housing part in the area of ​​the sealing bead and / or in the radially outer edge area of ​​the disc supporting the valve diaphragm.

[0010] The additional sealing arrangements are designed in such a way that their sealing effect is largely independent of manufacturing tolerances and the clamping force acting between the upper and lower housing sections.

[0011] According to an example explanation of this design principle, it can be provided that the sealing bead of the valve diaphragm is received in an axial annular groove which is formed by an axial shoulder in the upper housing part and an annular axial projection of the lower housing part radially encompassing this, wherein this axial annular groove is dimensioned such that the elastic material of the valve diaphragm, displaced when the upper housing part is clamped against the lower housing part, reaches at least one receiving space of the annular groove intended for this purpose, and wherein the at least one receiving space together with the displaced material forms the additional sealing arrangement. The receiving space is preferably a part of the annular groove which, in the unloaded case, i.e. when the lower housing part and the upper housing part are not yet fully joined, is not filled by the sealing bead of the valve diaphragm.

[0012] At this point, it should be noted that in the embodiments just mentioned and all those still to be described, the annular, axial projection of the lower housing part can be produced by a circular recess in the end face of the lower housing part near the upper housing part, without this being specifically indicated in each case.

[0013] According to an exemplary design, it can be provided that the annular groove has at least one axial inclined surface and a radial surface, that the annular groove forms a receiving space in the region of the radial surface, which is not filled by the sealing bead without axial force acting on the upper housing part and / or the lower housing part, and that after the upper housing part has been clamped against the lower housing part, elastic material of the sealing bead of the valve membrane is arranged, which is displaced into the receiving space, wherein the receiving space and the material of the sealing bead displaced therein form the additional axial sealing arrangement.

[0014] According to the invention, it can be provided that in the annular axial projection of the lower housing part in the region of the sealing bead, a receiving space is formed by a radial circumferential groove, which receives elastic material of the valve membrane displaced when the upper housing part is clamped against the lower housing part and forms an additional radial and / or axial sealing arrangement.

[0015] According to the invention, it is also provided that the radial circumferential groove forming the receiving space in the axial projection of the housing lower part has a circumferential inclined surface, a circumferential axially parallel surface and a radial, circumferential surface, that an additional radial sealing effect is achieved on the circumferential inclined surface, and that this receiving space together with the displaced material of the sealing bead forms the additional radial sealing arrangement.

[0016] One embodiment provides that in a radially outer, annular, axial projection of the disc supporting the valve membrane in the region of the sealing bead, a receiving space is formed by a radial circumferential groove, which receives elastic material of the valve membrane displaced when the upper housing part is clamped against the lower housing part and forms an additional, radial and / or axial sealing arrangement.

[0017] In addition, in another embodiment, an annular gap can be formed between the upper housing part and the lower housing part in the region of an upper side of the sealing bead as a receiving space for the elastic material displaced when the upper housing part is clamped against the lower housing part, wherein this annular gap together with the material displaced therein forms an additional radial sealing arrangement.

[0018] A further embodiment of the additional sealing arrangement provides that the radial surface of the upper housing part axially delimiting the annular groove and / or the surface of the disc facing the sealing membrane have an axially aligned annular bead, that in the annular, axial projection of the lower housing part or in the annular, axial projection of the disc a circumferential groove is formed as a receiving space for the elastic material displaced when the upper housing part is clamped against the lower housing part, and that the receiving space formed by the circumferential groove together with the at least one annular bead forms an additional axial sealing arrangement.

[0019] Furthermore, in another embodiment, it can be provided that the housing lower part has an annular, radial bearing surface and the disc supporting the valve membrane has a complementary annular surface, and that an annular groove for receiving an O-ring is arranged in the bearing surface of the housing lower part and / or in the annular surface of the disc, and wherein the O-ring forms an additional axial sealing arrangement in the annular groove.

[0020] A further possibility of forming an additional sealing arrangement in the diaphragm valve arrangement can be that the lower housing part has an annular, radial bearing surface for the disc supporting the valve diaphragm, that this bearing surface of the lower housing part or a complementary annular surface of the disc supporting the valve diaphragm facing this bearing surface is provided with a molded-on coating of silicone rubber or a vulcanized-on coating of rubber, wherein the coating of silicone rubber molded onto the bearing surface of the lower housing part or onto the complementary annular surface of the disc or the vulcanized-on coating of rubber forms an additional axial sealing arrangement.

[0021] Another design of the additional sealing arrangement in the diaphragm valve arrangement provides that the outer diameter of the disc supporting the valve diaphragm is smaller than the inner diameter of the annular axial projection of the housing base, and that the annular space formed thereby between the disc and the projection is filled by a seal made of silicone rubber injected onto the radial outer surface of the disc or a seal made of rubber vulcanized onto the radial outer surface, wherein the seal injected onto the radial outer surface of the disc forms an additional axial sealing arrangement.

[0022] A further embodiment of the additional axial sealing arrangement may consist in a circumferential groove for receiving an O-ring being formed in the outer circumference of the disc supporting the valve diaphragm, wherein the circumferential groove, together with the O-ring, forms an additional axial sealing arrangement. In this case, the circumferential groove may have a rectangular or triangular cross-section.

[0023] A further possibility for forming a diaphragm valve arrangement may be that the disc supporting the valve diaphragm is sealed against the housing base by an adhesive as a sealing means or by a sealing means enclosed in microcapsules or by a liquid sealing means, wherein the sealing means forms an additional axial and / or radial sealing arrangement.

[0024] In this case, it can be provided that the sealing means is arranged at least between an annular, radial support surface on the lower housing part for the disc supporting the valve membrane and a complementary annular surface of the disc facing this support surface.

[0025] Alternatively, it may be provided that the sealing means is arranged between the radial outer surface of the disc supporting the valve membrane and a radial inner surface of the annular axial projection of the housing lower part.

[0026] Furthermore, it can be provided that the sealing means is arranged in an L-shaped cross-section between the radial outer surface of the disc supporting the valve membrane and the radial inner surface of the annular axial projection of the housing lower part and between the annular, radial support surface on the housing lower part for the disc supporting the valve membrane and a complementary annular surface of the disc facing this support surface.

[0027] Finally, in this context, it can be provided that the sealing means is arranged in a C-shaped cross-section on the radially outer edge of the disc supporting the valve membrane.

[0028] Another possibility to realize an additional sealing arrangement can be that the disc supporting the valve diaphragm is arranged with a sealing radial press fit on the housing base, whereby the press fit forms an additional axial sealing arrangement.

[0029] Finally, it can be provided that the disc supporting the valve membrane has an annular axial projection radially enclosing the sealing bead on the valve membrane, and that the disc including its annular axial projection is arranged with a sealing radial press fit on the housing lower part, thereby forming an additional axial sealing arrangement.

[0030] The invention will be further explained below with reference to several exemplary embodiments of additional sealing arrangements. In the accompanying drawings, the Figures 1 to 4four different embodiments of additional sealing arrangements in the area of ​​the sealing bead on the sealing membrane, and the Figures 5 to 20 additional sealing arrangements in the area of ​​a disc supporting a valve membrane, wherein the embodiments of Figures 6 to 11 do not belong to the invention according to the main claim 1.

[0031] In the figures, only a section of a diaphragm valve arrangement in a valve device of an anti-lock braking system is shown with the additional sealing arrangements according to the invention, wherein the same parts are designated by the same reference numerals.

[0032] The Fig. 1The diaphragm valve arrangement 1a shown has an upper housing part 2 and a lower housing part 6, which are joined together by radially outward clamping of a valve diaphragm 10 and a disc 14 axially supporting the valve diaphragm 10. In the clamping area, an annular groove 3 is formed by an axial inclined surface 4 and a radial surface 4a on the upper housing part 2 as well as an axial annular surface 9 on an annular, axial projection 8 of the lower housing part 6. The lower housing part 6 further has, radially adjacent to a central axis 13 of the diaphragm valve arrangement 1a, a valve seat 7 for a sealing lip 12 formed on the valve diaphragm 10.

[0033] A sealing bead 11 is formed radially outwardly on the valve membrane 10 and is received in the axial annular groove 3 formed by the axial inclined surface 4, the radial surface 4a, and the annular surface 9. This annular groove 3 is dimensioned such that a receiving space 5 is present below the radial surface 4a of the upper housing part 2, in which no material of the sealing bead 11 is present when the housing parts 2, 6 have not yet been finally joined.

[0034] Axially between the valve diaphragm 10 and the housing base 6 is the disc 14 supporting the valve diaphragm 10, which has an axial opening 15 adjacent to the sealing lip 12 of the valve diaphragm 10. This disc 14 rests axially with its complementary annular surface 14f on an annular bearing surface 30 of the housing base 6.

[0035] As soon as the upper housing part 2 and the lower housing part 6 are joined together with a clamping force F and thereby clamped against each other, the sealing bead 11, which was originally largely rectangular in axial section, is radially compressed in the annular groove 3 formed by the axial inclined surface 4, the radial surface 4a and the annular surface 9 on the annular, axial projection 8. In this case, material of the sealing bead 11 is pressed towards the receiving space 5, which is visibly partially filled by the displaced elastic material 11a.

[0036] In comparison to the prior art mentioned at the beginning, which shows a rectangular annular groove for receiving a rectangular sealing bead with the same cross-section on the valve membrane 10, in the embodiment according to Fig. 1an additional sealing arrangement is formed by the annular groove 3 from the axial inclined surface 4 and the radial surface 4a in the upper housing part 2 as well as the annular surface 9 on the annular, axial projection 8 of the lower housing part 6 in conjunction with the plastically deformed sealing bead 11 and the elastic material 11a displaced into the receiving space 5. The receiving space 5 is dimensioned such that, even under unfavorable tolerance conditions, it is not completely filled by the displaced elastic material 11a of the sealing bead 11. As a result, excessive clamping forces F do not act on the sealing bead 11, which could otherwise lead to disadvantageous hardening of the elastic material of the valve diaphragm 10.By the described formation of the receiving space 5 in the annular groove 3 and by the elastic material 11a of the sealing bead 11 pressed into it, an axial extension of the effective sealing surface of the sealing bead 11 has been advantageously achieved, whereby an additional axial sealing arrangement is formed, which leads to an overall improved seal.

[0037] The embodiment of the invention according to Fig. 2shows a partial view of a diaphragm valve arrangement 1b with an upper housing part 16 and a lower housing part 20, between which a valve diaphragm 27 and a disc 14 supporting this valve diaphragm 27 are clamped radially on the outside. The upper housing part 16 has an axially parallel surface 18 on the radial inside and an adjoining radial surface 19. On the radial inside of the lower housing part 20, an axial annular surface 22a is formed, which is formed on an annular axial projection 22 of the lower housing part 20. The axial projection 22 can be created by a circular recess on the end face of the lower housing part 20 near the upper housing part. The aforementioned surfaces 18, 19, 22a together form a rectangular annular groove 17. In this annular groove 17, a sealing bead 28 is arranged, which is formed radially on the outside of the valve diaphragm 27 and has a rectangular cross-section in axial section.

[0038] This valve diaphragm 27 also rests radially inward with a sealing lip 29 on a valve seat 21 formed radially inward on the lower housing part 20. The valve diaphragm 27 is axially supported by a disc 14, which rests with an annular surface 14f on an associated support surface 30 of the lower housing part 20. The valve diaphragm 27 and the disc 14 are clamped between the lower housing part 20 and the upper housing part 16 by means of a clamping force F.

[0039] In the mentioned axial annular surface 22a in the axial projection 22 of the housing lower part 20, a circumferential groove is formed by a circumferential inclined surface 23, an axially parallel surface 24 and a radial, circumferential surface 25, which is dimensioned such that an elastic material 28a of the sealing bead 28 displaced when the housing upper part 16 is clamped against the housing lower part 20 only partially fills a receiving space 26 formed by the circumferential groove, wherein the receiving space 26 together with the displaced material 28a forms an additional sealing arrangement.

[0040] The diaphragm valve arrangement 1c according to Fig. 3 differs from the diaphragm valve arrangement 1b according to Fig. 2only in that the annular groove or the receiving space 26 in the axial projection 22 of the housing base 20 is formed rectangularly from an axially parallel surface 24 and two parallel, radially circumferential surfaces 25a, 25b, into which the elastic material 28a of the sealing bead 28 is displaced without completely filling the receiving space 26. An additional axial and radial sealing arrangement is formed by the receiving space 26 in conjunction with the elastic material 28a displaced therein.

[0041] According to Fig. 4An additional sealing arrangement on a diaphragm valve arrangement 1d can also be formed by a circumferential inclined surface 23a on the annular, axial projection 22 of the lower housing part 20 and a gap 26b as a receiving space between the annular, axial projection 22 on the lower housing part 20 and the upper housing part 16, into which displaced elastic material 28a can pass without completely filling the gap 26b. In this diaphragm valve arrangement 1d, two additional sealing arrangements are therefore formed at an axial distance from one another, namely the receiving space 26 and the gap 26b.

[0042] The diaphragm valve arrangement 1e according to Fig. 5 differs from the diaphragm valve arrangements according to the Figures 2 to 4in that the sealing bead 28 with a rectangular cross-section is arranged on the valve diaphragm 27 in the annular groove 17, formed from the axially parallel surface 18 and the radial surface 19 on the upper housing part 16 and the annular axial projection 22, and has the same dimensions as the annular groove 17 except for tolerance differences. In order to compress the area of ​​the valve diaphragm 27 with the sealing bead 28 to the required extent under the action of the clamping force F, the upper housing part 16 has an axially inwardly projecting annular bead 16a in its groove-related radial surface 19, while the disc 14a supporting the valve diaphragm 27 is provided with an axially outwardly pointing annular bead 14b. As a result, elastic material of the sealing bead 28 is displaced into a circumferential groove in the projection 22 forming a receiving space 26 for the displaced elastic material, whereby a first additional sealing arrangement is formed.Furthermore, an annular groove 31 for receiving an O-ring 32 is arranged in the lower housing part 20 in the region of the support surface 30 for the disc 14a supporting the valve membrane 27, whereby a second, additional radial sealing arrangement is formed.

[0043] The embodiments according to the Figures 6 to 11 show additional sealing arrangements on diaphragm valve arrangements 1f, 1g, 1h in connection with the disc 14, 14c supporting the valve diaphragm 27, wherein the embodiments of Figures 6 to 11 do not belong to the invention according to the main claim 1.

[0044] According to the Figures 6 and 7A coating 36 made of LSR silicone rubber or rubber is injection-molded or vulcanized onto the disc 14 supporting the valve diaphragm 27. The LSR silicone rubber (LSR = Liquid Silicone Rubber) is injection-molded from a sprue 34, with several axial bores 35 distributed evenly and annularly in the disc 14 supporting the valve diaphragm 27 for better adhesion to the disc 14 supporting the valve diaphragm 27. The injection-molded or vulcanized coating 36 made of LSR silicone rubber or rubber rests on a support surface 33 of the lower housing part 20 and seals the disc 14 axially and radially against the annular axial projection 22 of the lower housing part 20.

[0045] The embodiment of the diaphragm valve arrangements 1g according to the Figures 8 and 9 differs from the embodiments according to the Figures 6 and 7in that no axial bores 35 are formed in the disc 14 and that a sprue opening 34a is arranged radially inwardly, whereby the injection-molded or vulcanized coating 36a made of LSR silicone rubber or rubber can be made comparatively narrower.

[0046] The embodiment of the diaphragm valve arrangements 1h according to the Figures 10 to 12 differs from the diaphragm valve arrangements according to the Figures 6 to 9in that the diameter of the radial outer surface 14g of the disc 14c supporting the valve membrane 27 is smaller than the inner diameter of the annular axial projection 22 on the lower housing part 20. A seal 36b is injection-molded or vulcanized onto the radial outer surface 14g of the disc 14c via a sprue opening 34b. The seal 36b consists of LSR silicone rubber or rubber and fills the annular space between the disc 14c, the valve membrane 27, the annular, radial projection 22 on the lower housing part 20 and the support surface 33 for the disc 14c supporting the valve membrane 27 in such a way that an additional axial and radial sealing arrangement is formed.

[0047] As the longitudinal section view according to Fig. 12As illustrated, the seal 36b made of silicone rubber or rubber, which is injection-molded radially on the outside of the disc 14c, can have two annular beads 36c, 36d pointing in opposite axial directions, which are pressed into correspondingly assigned receiving grooves in a sealing manner when the upper housing part 16 and the lower housing part 20 are assembled.

[0048] The embodiment of the diaphragm valve arrangements 1i, 1j according to the Figures 13 and 14 differ from the embodiment according to Fig. 5 only in that a radial annular groove 31a, 31b for receiving an O-ring 32a is formed in the outer circumference of the disc 14a supporting the valve membrane 27. This O-ring 32a serves to axially and radially seal the disc 14a supporting the valve membrane 27 against the annular axial projection 22 on the housing base 20 in the axial direction.

[0049] According to Fig. 13the annular groove 31a in the disc 14a has a rectangular cross-section, while the annular groove 31b in the embodiment according to Fig. 14 The sealing bead 28 of the valve membrane 27 is, as in the embodiment according to Fig. 5 by the axially aligned annular bead 14b on the disc 14a and the axially aligned annular bead 16a on the radial surface 19 of the upper housing part 16. The elastic material displaced by the mutual clamping of the upper housing part 16 relative to the lower housing part 20 by means of the clamping force F reaches, as in the embodiment according to Fig. 5 , into the circumferential groove 26 which is formed in the annular axial projection 22 of the housing base 20.

[0050] The embodiment of the diaphragm valve arrangements 1k, 1l, 1m, 1n according to the Figures 15 to 18 differ from the embodiments of diaphragm valve arrangements 1f, 1g according to the Figures 6 to 9 by the fact that according to Fig. 15 an adhesive layer 36e is arranged as a sealing means between the support surface 30 on the housing base 20 and the complementary annular surface 14f on the disc 14 supporting the valve membrane 27.

[0051] According to the Fig. 16 In the embodiment shown, this sealing means 36f is arranged between the radial outer surface 14g of the disc 14 supporting the valve membrane 27 and the annular axial projection 22 of the housing lower part 20.

[0052] In the version according to Fig. 17 the sealing means 36g is L-shaped in cross-section and is arranged on the disc 14 supporting the valve membrane 27 in the region of the support surface 30 on the housing lower part 20 and the annular radial projection 22 of the housing lower part 20.

[0053] According to the Fig. 18In the embodiment shown, the sealing means 36h is arranged in a C-shape, as seen in cross section, on all sides of the radially outer edge region of the disc 14 supporting the valve membrane 27.

[0054] The sealant can be used in all examples mentioned according to the Figures 15 to 18 consist of an adhesive or a sealant enclosed in microcapsules or of a liquid, curable but elastic sealant, which form further additional sealing arrangements.

[0055] Finally, it is also possible to add further sealing arrangements to diaphragm valve arrangements 1o, 1p according to the Figures 19 and 20 to train those who, in accordance with Fig. 19 consists in that the disc 14a supporting the valve membrane 27 is fitted with a sealing press fit 37 into the annular radial projection 22 of the housing base 20. Similarly, according to Fig. 20the disc 14d supporting the valve membrane 27 has an annular axial projection 14e which is fitted with a sealing press fit 37a into the annular radial projection 22 of the housing base 20.

[0056] All illustrated and described embodiments or exemplary embodiments according to the Figures 1 to 20 are based on the consideration that the clamping force F can be better controlled and adjusted by additional sealing arrangements between the upper housing part 2, 16 and the lower housing part 6, 20. This ensures that the sealing bead 11, 28 is not damaged by an excessive clamping force F, while the sealing effect between the upper housing part 2, 16 and the lower housing part 6, 20 is nevertheless improved. List of reference symbols (part of the description)

[0057] 1a -1p Diaphragm valve arrangement 2Housing upper part 3Annular groove 4Axial inclined surface on the housing upper part 2 4aRadial surface on the housing upper part 2 5Receiving space 6Housing lower part 7Valve seat on the housing lower part 6 8Annular axial projection on the housing lower part 6, formed, for example, by a frontal depression in the housing lower part 6 9Axial annular surface on the projection 8 of the housing lower part 6 10Valve diaphragm 11Sealing bead on the valve diaphragm 11 11aDisplaced, elastic material of the sealing bead 11 12Sealing lip on the valve diaphragm 10 13Central axis of the diaphragm valve arrangement 14Disc supporting the valve diaphragm 14aDisc supporting the valve diaphragm 14bAnnular bead on the disc 14a 14cDisc supporting the valve diaphragm 14dDisc supporting the valve diaphragm 14eAnnular axial projection of the disc 14d 14fComplementary annular surface of the disc 14, 14a, 14c, 14d 14gRadial outer surface of the disc 14, 14a, 14c,14d 15Centric opening in the disc 14, 14a, 14c, 14d 16Housing upper part 16aAnnular bead on the housing upper part 16 17Annular groove 18Axis-parallel surface on the housing upper part 16 19Radial surface on the housing upper part 16 20Housing lower part 21Valve seat on the housing lower part 20 22Annular, axial projection on the housing lower part 20, formed, for example, by a frontal depression in the housing lower part 20 22aAxial annular surface on the housing lower part 20 23Circumferential inclined surface on the housing lower part 20 23aCircumferential inclined surface on the housing lower part 20 24Axis-parallel surface on the housing lower part 20 25aFirst radially circumferential surface of the receiving space 26 25bSecond radially circumferential surface of the receiving space 26 26Circumferential groove or receiving space in projection 22 26aCircumferential groove or receiving space in projection 22 26bAnnular gap as receiving space 27Valve diaphragm 28Sealing bead on valve diaphragm 27 28aDisplaced,elastic material of the sealing bead 28 29Sealing lip on the valve membrane 27 30Annular contact surface on the housing base 6, 20 31aAnnular groove in the housing base 20 (1st design) 31bAnnular groove in the housing base 20 (2nd design) 32O-ring (1st design according to , Fig. 5 ) 32aO-ring (2nd version according to Figs. 13 and 14 ) 33Contact surface on the housing base 20 34Gating opening (1st design) in the disc 14 34aGating opening (2nd design) in the disc 14 35Axial bores in the disc 14 36Injected or vulcanized coating (1st design) 36aInjected or vulcanized coating (2nd design) 36bInjected or vulcanized seal 36cFirst annular bead on seal 36b 36dSecond annular bead on seal 36b 36eRadial sealing means 36fAxial sealing means 36gL-shaped sealing means 36hC-shaped sealing means 37Sealing interference fit 37aSealing interference fit FClamping force

Claims

1. Diaphragm valve arrangement (1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, 1i, 1j, 1k, 1l, 1m, 1n, 1o, 1p), for example in a valve device of an anti-lock braking system of a motor vehicle, comprising a disk-shaped valve diaphragm (10, 27) made of a resilient material, a disk (14, 14a, 14c, 14d) having a central opening (15), an upper housing part (2, 16) having an axial shoulder and a lower housing part (6, 20) having a radially encompassing, annular, axial projection, a circular recess being formed in an end face of the lower housing part (6, 20) near the upper housing part, one of the two sides of the valve diaphragm (10, 27) being arranged on the disk (14, 14a, 14c, 14d), the valve diaphragm (10, 27) having a peripheral sealing bead (11, 28) radially on the outside on its side remote from the disk, the disk (14, 14a, 14c, 14d) being arranged together with the valve diaphragm (10, 27) between the upper housing part (2, 16) and the lower housing part (6, 20) of the diaphragm valve arrangement (1), and the sealing bead (11, 28) being clamped between the upper housing part (2, 16) and the lower housing part (6, 20), at least one additional sealing arrangement being present on the upper housing part (2, 16) and / or on the lower housing part (6, 20) in the region of the sealing bead (11, 28) and / or in the radially outer edge region of the disk (14, 14a, 14c, 14d) supporting the valve diaphragm (10, 27), characterized in that the sealing bead (11, 28) of the valve diaphragm (10, 27) is received in an axial annular groove (3, 17) which is formed by the axial shoulder in the upper housing part (2, 16) and the radially encompassing, annular, axial projection (8, 22) of the lower housing part (6, 20), the axial annular groove (3, 17) being dimensioned such that the resilient material (11a, 28a) of the valve diaphragm (10, 27) displaced when the upper housing part (2, 16) is clamped against the lower housing part (6, 20) reaches at least one receiving space (5, 26, 26a, 26b) of the annular groove (3, 17), and the at least one receiving space (5; 26; 26a; 26b) together with the displaced material (11a, 28a) forming the additional sealing arrangement, in that the annular, axial projection (8, 22) of the lower housing part (6, 20) is formed by the circular recess in the end face of the lower housing part (6, 20) near the upper housing part, in that a receiving space (26) is formed by a radial peripheral groove in the annular axial projection (22) of the lower housing part (20) in the region of the sealing bead (28), which radial peripheral groove, when the upper housing part (16) is clamped against the lower housing part (20), receives the displaced resilient material (28a) of the valve diaphragm (27) and forms an additional radial and / or axial sealing arrangement, in that the radial peripheral groove forming the receiving space (26) in the axial projection (22) of the lower housing part (20) has a peripheral inclined surface (23), a peripheral axially parallel surface (24) and a radial, peripheral surface (25), in that the additional radial sealing effect is achieved on the peripheral inclined surface (23), and in that the receiving space (26) together with the displaced material (28a) of the sealing bead (28) forms the additional radial sealing arrangement.