FR2542843A1 - VALVE FOR FLUIDS - Google Patents

Abstract

VALVE FOR FLUIDS. IT INCLUDES BLOCKING ORGANS CONSTITUTED BY DISCS, ONE OF WHICH IS ROTATING AND PRESENTS PASSAGE OPENINGS, WHICH CORRESPOND TO PASSAGE OPENINGS OF TWO FIXED DISCS, ARRANGED ON Either side OF THE ROTATING DISC AND MOUNTED IN WATERPROOF SUPPORT AGAINST THIS. THE ROTATING DISC 7, ON ITS FACE OPPOSED TO THE FLUID INLET CANALIZATION, HAS AT LEAST ONE RECESS 18 WHICH COMMUNICATES FREELY WITH THE DOWNSTREAM SIDE OF THE VALVE, IN THE CLOSED POSITION OF THE latter, THANKS TO THE PASSAGE OPENINGS 11 FIXED DISC DOWNSTREAM 8; AND IN THAT EACH RECESS 18 EXTENDS RADIALLY OUTSIDE, OVER THE SURFACE OF THE ROTATING DISC 7, TO OVERFLOW BEYOND THE ZONES CORRESPONDING TO THE FLUID PASSAGE OPENINGS 11, SO AS TO COMMUNICATE WITH PURGE PASSAGES D 'AIR 16, 19, 20.

Description

1.

  The present invention relates to a valve for controlling

  der the passage of a fluid comprising closure members

  consisting of discs, one of which is rotating and has passage openings; these correspond to openings of passage of two fixed disks, arranged on both sides of the rotating disk and in waterproof support

against this one.

  Such valves are known for controlling the passage of a fluid, for example according to DT-PS 896 438 and 1103097,

  as well as according to DT-OS 2 945 834 The valves with

  Filling ganes are constituted by discs which offer the advantage that they can be produced in a simple manner, and are therefore relatively inexpensive to manufacture.

  Known valves of this kind have the disadvantage of not permitting

  automatically put a downstream air purge, in the closed position of the valve Or it is often very desirable to be able to perform such an air purge, for example in the case of a pneumatic circuit, when cutting the air the supply of air to the line serving a device of use, to disconnect this apparatus, or

  to carry out maintenance work.

  The object of the invention is to overcome the disadvantages set forth in order to provide a valve of the type specified above which is simple to produce and which functions in a manner

safe.

  This object is achieved according to the invention with a valve

  of the specified kind, characterized in that the disc

  on its opposite side to the arrival line of the

  fluid, has at least one recess which communicates freely with

  with the downstream side of the valve; in a closed position

  re of the latter, through the passage openings of the downstream fixed disk, and in that each recess of the rotating disk extends radially outwards, on the surface of this disk, to overflow beyond the zones corresponding to the fluid passage openings, so as to communicate with air purge passages in the body of the valve 2. Thus, thanks to the invention, the downstream pipe connected to the valve is always air purged automatically when the valve is put in the closed position

  solution provided by the invention makes it possible to realize a

  not simple, and economical manufacturing.

  We will now describe, by way of example, no

  1 embodiment of the invention, with reference to the appended drawing in which: FIG. 1 represents a valve according to the invention, in longitudinal section, and

  Fig 2 is a partial cross section of Fig 1.

  In the embodiment of FIGS. 1 and 2, the valve comprises a body provided with two connecting ends 3

  and 4, and whose central part contains the organs of ob-

  As we can see, these obturator

  three discs 6, 7 and 8, the median disc 7 of which is rotatably mounted. Preferably, the discs 6, 7 and 8 are made of alumina and are mounted directly in a watertight manner. against each other The two external fixed disks 6 and 8,

  applied, thanks to the reaction efforts of the

  9, against the rotating disc 7

  it is mounted on an axial pivot 10, engaged in corresponding housing of the fixed discs 6 and 8 The three discs 6, 7 and 8 are provided with openings 11 for the passage of the

fluid controlled by the valve.

  It can also be seen that the rotating disc 7 is connected to an actuating member, comprising an annular portion 12 which completely surrounds the mobile disc 7, and is thus held in the radial direction. The rotating disc 7 carries an appendage 13 engaged in a corresponding notch of

  maneuvering organ, which secures the annulling part

  re 12 of the actuator and the rotating disc 7, but

  only to transmit the efforts corresponding to the

  The annular portion 12 of the operating member is mounted in a housing consisting of

  by an internal groove 14 of the body of the valve, and extends

3.

  externally by a lever 15 which passes through a slot

  elongated 16 of the body, to be actuated by hand In the housing constituted by the internal groove 14 of the body

  of the valve, there are centering rings 17

  disc springs, mounted so as to exert

  an elastic force in the axial direction, on the annular

  12 of the maneuvering organ, in order to collect the ef-

  transversal strengths as we see it, in addition, the disc

  rotating 7 comprises two recesses 18, which are arranged: su-

  perficially-in the rotating disk 7, on the face of

  this one, which is opposed to the arrival line of the flui-

  In the closed position of the valve, as schemati-

  1, the recesses 18 of the downstream face of the disc

  7 that rotate freely communicate with the downstream side of the valve through the openings 11 of the fixed disk

  In addition, the recesses 18 of the downstream face of the disc

  turning in the radial direction beyond the

  openings 11 of the downstream disk 8, so as to communicate

  with air bleed passages, constituted by the elongated slot 16 of the valve body, by a partial notch 19 of the centering rings 17, and by holes 20 pierced in the body of the valve In the open position

  of the valve, the recesses 18 of the surface of the rotating disk

  7, and the corresponding areas of the surface of this

  that are covered by the sealing surfaces of the disc

fixed 8.

  As already stated, the embodiment of the valve

  according to the invention which has just been described does not constitute

  that a non-limiting example of the invention can be

  Indeed, to bring to this one many variations of

  of the invention, in particular as regards the arrangement and configuration of the various members of the valve, and

  to the operating mode of the rotating disk.

4.

Claims (1)

CLAIM   1 valve for fluids comprising closure members   formed by discs, one of which is rotating and has openings for passage, which correspond to openings for the passage of two fixed disks, arranged on the   and other of the rotating disc and mounted in tight   be this one, valve characterized in that the rotating disk   (7), on its opposite side to the inlet pipe of the fluid   of, has at least one recess (18) which communicates freely with   with the downstream side of the valve, in the closed position thereof, through the passage openings (fi) of the disc   downstream fixed (8); and in that each recess (18) extends   dial out, on the surface of the rotating disk   (7), to overflow the areas corresponding to the openings   fluid passageways (11) so as to communicate with   air purge passages (16, 19, 20).