DE2359907A1 - PRESSURE REGULATOR - Google Patents

Description

ElKENBERG & BRÜMMERSTEDT

PATENT LAWYERS IN HANOVER

ΙΙΑΐ / EER SlDDBLEY DYLiAIiECS LTD. 240/533

Pressure regulator

The invention "relates to a pressure regulator for a liquid or gaseous medium with which, for example, a supplied medium is at a pressure relative to a medium with a reference pressure. In particular the invention deals with a pressure regulator in which the reg flow through one or more openings within from specified pressure limits. ■

Known 'pressure regulators of this type have a number of Disadvantages. If the items have to be small, they are difficult to manufacture and assemble, and through Eccentricity and other minor inaccuracies in the relative The position of the parts in relation to one another can be used as a function of the controller. occur under dynamic conditions.

409822/0422

The "known pressure regulators, as they" are shown, for example, in FIGS Shutdown "at the cessation of the flow" causes an Ilaxmuni to be reached as soon as the specified level pressure is exceeded, but "they have the disadvantage that they have a notch that runs through a valve opening, so that eccentricity or" angular deviations ae ^ S-oac. RTB flow characteristics in the mouth "impaired v.? ground Ifenn also the working cycle 3olener cooperating 'is small venal ₉ causes the input = · penetration of Sohauts or other Yerunrsinigungen a Yer- k' ■■ *>' : i of the interacting i'eile and undesirable

If such individual parts are very small, they can only be manufactured with great difficulty and at great expense, and can be massively processed. If then as the pole of a bad adjustment or a struggle of dirt stick or on the closure body of the Yentil in another way kept slightly outside his seat v / erden .io'llte, produces the consequent 2unalune des strtziab Ii erhetiSsri or regulated pressure no additional burden on the £ i ^ sss. In this construction the effective J3elastu :: ^ the seat to a decrease due to the resulting confusion; .-: ν; τβη DriiokaGfalles over the Yentil.

^ .ez-f invention is based on the object mentioned

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BAD ORiGfNAL-

subsequently submitted]

3 -

Easy to manufacture and assemble single parts gets by, with the cost of the finished pressure regulator. simultaneous improvement of the mode of action Te ^ reduces will.

The object is achieved according to the invention in that the inlet path for a pressure medium in the housing ends at a valve seat, since a separating element in the form of a plate, a piston or a membrane divides the housing into two chambers, but within , of the housing is movable and carries a closure part for opening and closing the valve seat, that on the opposite side of the separating element an iu-laßweg is provided and one or more passages are attached in the separating element, which allow a flow from one side to the other and that an off ^(composed chamber is provided at the inlet side of the separating element, which a medium is supplied with a reference pressure, wherein a proportion of the area of the separating element exposed to the .Bezugsdruck at the inlet side and acting on the separating element is a spring force strives to remove the closure part from the valve seat.

The invention is explained below with reference to the drawing explained in more detail. In the drawing:

1a, 1b and 1c are schematic representations of known Pressure control valves,

Fig. 2 is a schematic representation

of a valve according to the invention

409822/0421

BATH ORIGINAL

Pig. 2a, 2b and 2c are schematic representations of

Variants of the Pig. 2 shown valve and

Ji ¹ Xg. 3 is a perspective view

a practical implementation form des in Pig. 2 pressure regulator shown in cross section.

the ones in Pig. 1a, 1b and 1c illustrated pressure regulators a respective closure body 11 is provided in each case, the in itichtung on the seat 12 is under Peders tension and one Has shaft 1 3, the durcli the seat opening to the downstream Side of the valve. In order to open the valve, the shaft comes into engagement with a piston 14 on which piston one side of the downstream pressure and on the other side a Peder 1 5 and the medium with the reference pressure works. The task of the piston 14 is evident in FIGS. 1b and 1c. 1a replaced by a membrane 16 or by bellows 17.

The one in Pig. 2 according to the invention shown Pressure control valve includes a sealed housing 21 a bellows assembly 22, which consists of two cylindrical bellows parts 22a and 22b, which are arranged concentrically to one another and at one end with a plate 23 within the housing and at the other end with an end closure 28 of the housing

409822/0422

are sealingly connected. Sin central peg that follows protrudes outside and inside of the end closure 28, "has a Passage 24 which terminates at the inner end in an outlet which is surrounded by a valve seat and a valve closure plate 26 made of neoprene on the plate 25 is opposite. Passages 27 in the end closure part 28 cause communication between the barely bounded by the bellows 22a and 22Td " and an external source of reference pressure, during passages 29 in the plate 23 serve to create a flow between the sander above the plate 23 and the tree within of the inner bellows 22a, in which the valve inlet flows out. The housing also includes an outlet 25 from the chamber above the plate 23.

vJenn the pressure control valve under normal atmospheric Assembled conditions, the length of the bellows 22 is such that the closure plate 26 from the the valve seat on the center pin forming surface 24a is removed.

However, under working conditions, a pressurized medium is passed through passage 24 and a reference pressure is fed to the 'tree 31. The reference pressure acts opposite to the counter pressure generated at outlet 25, so that closing of the valve is only possible when the pressure at outlet 25 exceeds that supplied through passage 24 Intake pressure exceeds by an amount determined by the ratio of the total area of the plate 23 to the area of the Plate is determined that corresponds to the reference pressure in space 31 is set, whereby the mechanical displacement of the bellows members 22a and 22b and their effective spring constants must be taken into account.

409822/0422

BATH ORIGINAL

Thus, the counter pressure in the valve becomes a function of the reference pressure 3 through the selection of the relative working areas Done, we should note that it is not with giner oolchsn Arrangement is possible, by appropriate dimensioning of the interacting parts, other operating conditions for pressure control to create.

l ^? ig. Figure 3 shows a practical implementation of the in Pig. 2 pressure control valve shown schematically. In this A-Usleitformn the closure plate 26 is arranged in a part 34 which is screwed into the plate 23, the end face 24a is offset in the outlet 35 ″ at 32. This end face serves to prevent damage to the closure disk as a result of excessive Pressures that can be exerted by the area 33 surrounding the passage by making a metal-to-metal engagement with the member 34 when the valve seat and closure plate are in firm but not unduly rigid engagement.

Pig. 2a shows a modification in which the bellows 22 and the plate 23 are spring-loaded upwards Piston 36 are replaced, which conducts 21 g in the U-housing and one Has central bore 37 in which the pin containing the inlet path 24 is slidably mounted, the valve closure plate 26 is arranged at the inner end of the bore.

409822/0 ^ 22

In J? Y. 2b, the plate 23 is covered by a membrane 58 ersetzii, which is connected to rait dem u-ehau.se 21 in a sealing manner and makes the outer bellows 22b unnecessary. In Mg. 2 c is the bellows 22b by an EaIg 22c on the opposite Side of plate 23 replaced.

- patent claims

Claims (7)

Patent claims: "L.) Pressure regulator for a liquid or gaseous medium, characterized in that the jOinlaßweg (24) for a [pressure medium in the housing (21) ends at a valve seat (24a), that a separating element (23) in the form of a plate, a Piston or a membrane, the housing (21) is divided into two chambers, but is movable within the housing and a closure part (26) for opening and closing the valve seat (24a) carries that on the opposite side of the Ϊ racing element (23) an outlet path (23) is provided and in the fuel element (23) one or more passages (29) are attached, which allow a flow from one side to the other, and that a sealed chamber (31) on the inlet side of the Trermeletnentes (23) is provided, to which a medium is supplied with a reference pressure, a portion of the surface of the '!' Racing element being exposed to the reference pressure on the inlet side and a spring force acting on the 'iVennelement, which strives to achieve the verse Remove the closing part (26) from the valve seat (24a). 2. Pressure regulator according to claim 1, characterized in that the sealed chamber (31) is formed by resilient bellows means which at the same time generate the spring load. 3. Pressure regulator according to claim 2, characterized in that the JBalgraittel consists of two cylindrical .Bälgen (22a, 22b) which have different diameters and are arranged concentrically around the axis of the valve seat and the separating element. 409822/0422 4. Pressure regulator according to. Claim 3, characterized in that the sleeve with the smaller diameter (22a) is on the inlet side of the separating element and the bellows with the larger diameter (22b) is on the outlet side. 5. Pressure regulator according to claim 1, characterized ^ that the closure part (26) sits on a membrane (38), the sand of which is sealingly connected to the G-ehäusewand, and that the sealed chamber through the membrane (38) and one concentric to the Axis of the valve seat and the membrane arranged .Balg (22c) is formed. 6. Pressure regulator according to claim 1, characterized.? that the inlet path (24) is disposed within an axially projecting into the Göiäuse (21) pin _5, which slides in the bore of a Eolbens (36), which in turn slides in the housing (21) and the Yerschlußteil (26) at the inner end of the Bore carries. 7. Pressure regulator according to one of the preceding claims, characterized in that the valve seat consists of a metal web (33) which is surrounded by a recessed J surface (32) that the closure part. (26) is relatively soft compared to the metal web Closure part is in firm, but not excessively hard engagement. - 409822/0422 Blank page