Diaphragm valve without a supporting ring and without a supporting plate

Patent metadata

Field	Value
Publication number	US-2020282966-A1
Application number	US-201816496819-A
Country	US
Kind code	A1
Filing date	Mar 20, 2018
Priority date	Mar 27, 2017
Publication date	Sep 10, 2020
Grant date	—

Abstract

A diaphragm valve (DV), includes: an elastomer-diaphragm (ED) in/on a valve-housing via a radially-outer-edge-bead and interacts with a DV-seat (DVS); a first-control-chamber (CC), delimited by a first-surface, facing away from the DVS, of the ED and loadable and relieved of load by a pressure-medium (PM), and when the first-CC is loaded, the ED is pushed against the DVS; a second-CC, delimited by a second-surface, facing away from the first-surface, of the ED and loadable and relieved of load and surrounds the DVS, and, when the second-CC is loaded by PM, the ED lifts off from the DVS and the second-CC is connected to a PM-flow-channel (FC), on which the DVS is formed at an end-side; and the PM-FC, DVS, ED are coaxial as to an axial-direction, and the smallest thickness of the ED's central-region, as to a radial-direction perpendicular to the axial-direction, is at least 30% of the PM-FC's inner-diameter.

First claim

1 - 11 . (canceled)

12 . A diaphragm valve, comprising:
an elastomer diaphragm, which is held in or on a valve housing via a radially outer edge bead and interacts with a diaphragm valve seat; a first control chamber, which is delimited by a first surface, facing away from the diaphragm valve seat, of the elastomer diaphragm and is able to be loaded and relieved of load by pressure medium, wherein, when the first control chamber is loaded by pressure medium, the elastomer diaphragm is pushed against the diaphragm valve seat; a second control chamber, which is delimited by a second surface, facing away from the first surface, of the elastomer diaphragm and is able to be loaded and relieved of load by pressure medium and surrounds the diaphragm valve seat, wherein, when the second control chamber is loaded by pressure medium, the elastomer diaphragm has the tendency to lift off from the diaphragm valve seat and in the process the second control chamber is connected to a pressure medium flow channel, on which the diaphragm valve seat is formed at an end side; wherein the pressure medium flow channel, the diaphragm valve seat and the elastomer diaphragm are arranged in a manner coaxial with one another with respect to an axial direction, wherein an inner diameter of the pressure medium channel is 7.5 mm to 9.5 mm, wherein the Shore hardness of the elastomer diaphragm is at least 40 Shore A, and wherein the smallest thickness of the elastomer diaphragm in a central region of the elastomer diaphragm, which central region, as seen in relation to a radial direction perpendicular to the axial direction, is situated within the diaphragm valve seat, is at least 30% of the inner diameter of the pressure medium channel.

13 . The diaphragm valve of claim 12 , wherein the elastomer diaphragm is formed without an additional support ring, of which provision is made for supporting a radially outer region of the elastomer diaphragm, and/or without an additional support plate, integrated in the central region of the elastomer diaphragm, wherein the support ring and the support plate are produced from a material which differs from an elastomer.

14 . The diaphragm valve of claim 12 , further comprising:
spring devices which push the central region of the elastomer diaphragm against the valve seat as a result of spring forces.

15 . The diaphragm valve of claim 12 , wherein the pressure medium is formed by compressed air or by hydraulic fluid.

16 . The diaphragm valve of claim 12 , wherein the first control chamber and the second control chamber are additionally delimited by the valve housing.

17 . A pressure control valve arrangement for controlling a fluid pressure in a pressure medium-actuated and slip-regulated brake system of a vehicle, in which, during the slip regulation, the brake pressure is increased, held or reduced in at least one brake cylinder, comprising:
two diaphragm valves, including a holding or inlet diaphragm valve and an outlet diaphragm valve, and also two electromagnetic pilot control valves which are able to be activated by an electronic control device and which serve for the pilot control of the diaphragm valves are in a housing of the pressure control valve arrangement; wherein the holding or inlet diaphragm valve, in an open position, passes pressure medium through into the at least one brake cylinder and, in a closed position, prevents pressure medium being fed into the at least one brake cylinder, wherein the outlet diaphragm valve, in an open position, connects the at least one brake cylinder to a pressure sink and, in a closed position, blocks the connection between the at least one brake cylinder and the pressure sink, wherein of the holding or inlet diaphragm valve and the outlet diaphragm valve, at least the holding or inlet diaphragm valve is formed by a diaphragm valve, and wherein the diaphragm valve includes:
an elastomer diaphragm, which is held in or on a valve housing via a radially outer edge bead and interacts with a diaphragm valve seat;
a first control chamber, which is delimited by a first surface, facing away from the diaphragm valve seat, of the elastomer diaphragm and is able to be loaded and relieved of load by pressure medium, wherein, when the first control chamber is loaded by pressure medium, the elastomer diaphragm is pushed against the diaphragm valve seat;
a second control chamber, which is delimited by a second surface, facing away from the first surface, of the elastomer diaphragm and is able to be loaded and relieved of load by pressure medium and surrounds the diaphragm valve seat, wherein, when the second control chamber is loaded by pressure medium, the elastomer diaphragm has the tendency to lift off from the diaphragm valve seat and in the process the second control chamber is connected to a pressure medium flow channel, on which the diaphragm valve seat is formed at an end side; wherein the pressure medium flow channel, the diaphragm valve seat and the elastomer diaphragm are arranged in a manner coaxial with one another with respect to an axial direction, wherein an inner diameter of the pressure medium channel is 7.5 mm to 9.5 mm,
wherein the Shore hardness of the elastomer diaphragm is at least 40 Shore A, and
wherein the smallest thickness of the elastomer diaphragm in a central region of the elastomer diaphragm, which central region, as seen in relation to a radial direction perpendicular to the axial direction, is situated within the diaphragm valve seat, is at least 30% of the inner diameter of the pressure medium channel.

18 . The pressure control valve arrangement of claim 17 , wherein the first control chamber of the holding or inlet diaphragm valve is connected to an output of an electromagnetic pilot control valve, which forms an inlet pilot control valve, and in that the second control chamber of the holding or inlet diaphragm valve is connected to a pneumatic channel of a service brake valve, and the pressure medium flow channel of the holding or inlet diaphragm valve is connected to at least one pressure medium-actuated brake cylinder.

19 . The pressure control valve arrangement of claim 17 , wherein the outlet diaphragm valve is formed by a diaphragm valve, which includes:
an elastomer diaphragm, which is held in or on a valve housing via a radially outer edge bead and interacts with a diaphragm valve seat; a first control chamber, which is delimited by a first surface, facing away from the diaphragm valve seat, of the elastomer diaphragm and is able to be loaded and relieved of load by pressure medium, wherein, when the first control chamber is loaded by pressure medium, the elastomer diaphragm is pushed against the diaphragm valve seat; a second control chamber, which is delimited by a second surface, facing away from the first surface, of the elastomer diaphragm and is able to be loaded and relieved of load by pressure medium and surrounds the diaphragm valve seat, wherein, when the second control chamber is loaded by pressure medium, the elastomer diaphragm has the tendency to lift off from the diaphragm valve seat and in the process the second control chamber is connected to a pressure medium flow channel, on which the diaphragm valve seat is formed at an end side; wherein the pressure medium flow channel, the diaphragm valve seat and the elastomer diaphragm are arranged in a manner coaxial with one another with respect to an axial direction, wherein an inner diameter of the pressure medium channel is 7.5 mm to 9.5 mm, wherein the Shore hardness of the elastomer diaphragm is at least 40 Shore A, and wherein the smallest thickness of the elastomer diaphragm in a central region of the elastomer diaphragm, which central region, as seen in relation to a radial di

Assignees

• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Werner Kai
• Grebe Jan

Classifications

• B60T8/36 Primary

  including a pilot valve responding to an electromagnetic force · CPC title

• B60T8/268

  using the valves of an ABS, ASR or ESP system · CPC title

• B60T8/4818

  in pneumatic brake systems · CPC title

• B60G2800/92

  ABS - Brake Control · CPC title

• B60T8/3615

  Electromagnetic valves specially adapted for anti-lock brake and traction control systems (electromagnetic valves in general F16K31/06) · CPC title