Membrane valve

Patent metadata

Field	Value
Publication number	US-2023030052-A1
Application number	US-202217874567-A
Country	US
Kind code	A1
Filing date	Jul 27, 2022
Priority date	Jul 30, 2021
Publication date	Feb 2, 2023
Grant date	—

Abstract

A membrane valve, with a valve housing, in which a housing interior is formed, in which housing interior a flexible control membrane is arranged. A drive plunger lies opposite a valve seat and the drive plunger has a shank body with a peripheral outer lateral surface. The outer lateral surface of the shank body of the drive plunger at least in the region of a guide section has a polygonally contoured prismatic shaping with a succession of outer side edges and outer side surfaces, wherein the edges and surfaces extend in the plunger longitudinal direction and the succession alternates in the circumferential direction of the drive plunger.

First claim

What is claimed is:

1 . A membrane valve, with a valve housing, in which a housing interior is formed, in which housing interior a flexible control membrane is arranged, said control membrane together with a base wall of the valve housing which lies opposite it in a height direction of the valve housing delimiting a control chamber which communicates with several valve channels, wherein at least one controllable valve channel of the several valve channels which runs into the control chamber and whose channel run-out in the control chamber is framed by a valve seat passes through the base wall, wherein a drive plunger lies opposite the valve seat of each controllable valve channel at the side of the control membrane which is away from the base wall in the height direction, said drive plunger comprising a shank body with a peripheral outer lateral surface, said shank body extending in a plunger longitudinal direction and with a guide section being linearly displaceably guided in the height direction in a guide recess of the valve housing which is delimited by an inner lateral surface, wherein each drive plunger can be driven by way of a drive device into a drive travel movement which is to and fro in the height direction of the valve housing, by which means a closure section of the control membrane which is arranged between a front end-face of the shank body which faces the base wall, and the opposite valve seat of a controllable valve channel is selectively movable into a closure position which is pressed upon the assigned valve seat or into an open position which is lifted from this valve seat, and wherein the outer lateral surface of the shank body of the drive plunger at least in the region of the guide section comprises a polygonally contoured prismatic shaping with a succession of outer side edges and outer side surfaces, said edges and surfaces extending in the plunger longitudinal direction and said succession alternating in the circumferential direction of the drive plunger.

2 . A membrane valve according to claim 1 , wherein the outer side edges of the prismatic guide section of the shank body of the drive plunger are convexly rounded.

3 . A membrane valve according to claim 1 , wherein the inner lateral surface of the guide recess is shaped cylindrically, wherein the prismatic guide section of the shank body of the assigned drive plunger bears on the inner lateral surface of the guide recess in a slidingly displaceable manner only with its outer side edges and wherein an intermediate space is present between the several outer side surfaces of the guide section and the cylindrical inner lateral surface of the guide recess.

4 . A membrane valve according to claim 3 , wherein the inner lateral surface of the guide recess is circularly cylindrical.

5 . A membrane valve according to claim 1 , wherein the inner lateral surface of the guide recess has a polygonally contoured prismatic shaping with a succession of inner side edges and inner side surfaces, said edges and surfaces each extending in the height direction of the valve housing and said succession alternating in the circumferential direction of the guide recess, wherein the outer side surfaces of the guide section and the inner side surfaces of the guide recess each bear on one another in a slidingly movable manner in pairs.

6 . A membrane valve according to claim 5 , wherein the inner side edges of the guide recess are non-rounded.

7 . A membrane valve according to claim 5 , wherein the cross sections of the guide section and of the assigned guide recess are shaped congruently to one another at least in the region of the inner side surfaces and outer side surfaces.

8 . A membrane valve according to claim 1 , wherein the guide section is contoured at least rectangularly and expediently octagonally.

9 . A membrane valve according to claim 1 , wherein the outer lateral surface of the shank body of the at least one drive plunger at least in the region of the guide section has a regular polygonal outer contour and is shaped according to a regular prism.

10 . A membrane valve according to claim 1 , wherein each guide recess is formed by at least one length section of a wall opening, said wall opening extending in the height direction of the valve housing and passing through a guide wall of the valve housing which at the side of the control membrane which is away from the base wall extends transversely to the height direction of the valve housing and through which wall opening the assigned drive plunger extends with its shank body.

11 . A membrane valve according to claim 1 , wherein the outer lateral surface of the shank body is stepped in the plunger longitudinal direction, wherein the shank body comprises a front length section which via a ring step connects onto the non-stepped guide section and which has a smaller cross-sectional area than the guide section.

12 . A membrane valve according to claim 10 , wherein the outer lateral surface of the shank body is stepped in the plunger longitudinal direction, wherein the shank body comprises a front length section which via a ring step connects onto the non-stepped guide section and which has a smaller cross-sectional area than the guide section, and wherein the wall opening comprises a lower opening end section which connects onto the guide recess in the direction of the base wall and which conically widens in the direction of the base wall, and wherein the ring step of the shank body is always located within the guide recess independently of the travel position of the drive plunger.

13 . A membrane valve according to claim 1 , wherein the outer lateral surface of the shank body merges into the front end-face of the shank body via a conically tapering transition surface of a front shank body end section.

14 . A membrane valve according to claim 1 , wherein the outer lateral surface of the shank body has a polygonally contoured prismatic shaping over its entire length.

15 . A membrane valve according to claim 1 , wherein the drive plunger at its rear end region which is opposite to the front end-face of the shank body comprises a radially projecting annular support section, on which a restoring spring which at the other side is supported on the valve housing is supported, by way of which restoring spring the drive plunger is biased into an travel end position of its drive travel movement.

16 . A membrane valve according to claim 1 , wherein the valve housing delimits a drive chamber in which the drive device of the membrane valve interacts with the drive plunger for creating the drive travel movement.

17 . A membrane valve according to claim 10 , wherein the valve housing delimits a drive chamber in which the drive device of the membrane valve interacts with the drive plunger for creating the drive travel movement, and wherein the guide wall is arranged between the drive chamber and a membrane receiving chamber in the height direction of the valve housing, wherein the control membrane extends in the membrane receiving chamber and wherein the membrane receiving chamber is divided by the control membrane into the control chamber which communicates with the valve channels and into a force transmission chamber which faces the guide wall, wherein each drive plunger is coupled in a force transmitting manner to the control membrane in the force transmission chamber.

18 . A membrane valve according to claim 17 , wherein the control membrane at its outer edge is sealingly clamped in all around between a first housing part which forms the base wall and a

Assignees

• Festo Se & Co Kg

Inventors

• Bühler Andreas
• Wunderlich Bengt Erich
• Schuster Tobias

Classifications

• F16K31/0641

  the valve member being a diaphragm · CPC title

• F16K31/10 Primary

  with additional mechanism between armature and closure member · CPC title

• F16K7/14 Primary

  arranged to be deformed against a flat seat · CPC title

• F16K31/0672

  the valve member being a diaphragm · CPC title