JPS59226704A - Regulator for membrane - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a rolled membrane to which a pressure medium such as pressurized air can be applied, the outer edge of the rolled membrane can be clamped between an annular flange of a dish-shaped housing half of the membrane housing; a spring plate in which the inner edge of the roll membrane is acted upon by at least one return spring and connected to an actuating rod, such as a valve actuating rod;
Concerning membrane regulators (membrane regulating motors) for valves, etc., which are fixed on a cylindrical rim.

Particularly and preferably, such a membrane regulator for a valve is constructed in such a way that the actuation of the pressure medium can be reversed, in which case this regulator can be selectively adapted to achieve valve opening or valve closing with the regulator. In order to be able to convert into
/gO° in the membrane housing with two pressure medium inlets (pressure medium inlet pipes). According to this, the operation of opening or closing the valve by the return spring when the pressure medium is no longer applied is ensured.

Previously known membrane regulators of this type have a wall thickness that remains consistent with the outer edge of the roll membrane or with other parts of this, and in this way the annular seven flange of the housing plate (housing half-hole) be restrained between According to this, the following disadvantages occur which are extremely undesirable for actual driving. That is, despite the fact that, prior to the introduction of the pressure medium, a close connection of the two housing halves by means of the corresponding screws exists, the constrained outer edge of the roll membrane is removed when the pressure medium is introduced into the membrane housing. begins to move outward between the thyroid 7 lunges. Therefore, it is absolutely necessary to tighten the connecting screw of the annular flange very strongly and thereby to prevent movement of the outer edge of the roll membrane. However, the annular flange must be made too thick, since under the influence of the screw forces the housing halves cannot bend in the area between the screws. In any event, installation and removal of the stripped housing becomes difficult and time consuming in this situation.

In the case of membrane regulators for valves capable of reversing the actuation of the pressure medium, it is also possible to prevent pressure medium passages from being placed in the wrong membrane housing when installing the valve in harsh operating conditions, e.g. in chemical plants, power plants, mines, etc. There is a risk that it may be connected incorrectly to the other side. In that case, the roll membrane may be folded back in the wrong direction, in which case it also becomes detached from the splash plate when its inner edge is secured by a tension band to the cylindrical rim of the spring plate. . As a result, correct operation may never be achieved and a dangerous situation may occur in the connected equipment.

The basic object of the invention is to eliminate one of the above-mentioned drawbacks of such membrane regulators in a simple manner.

In order to solve the first part of the above-mentioned problem, according to the invention, the roll membrane or the roll area of this roll membrane is applied to the outer edge of the roll membrane, which is applied between the annular 7 flange of the housing plate. At the location of the transition, a sealing ridge is provided which is exposed to the internal pressure of the housing space to which the pressure medium is applied;
This can preferably be produced by a corresponding thickening of a membrane of elastomeric material, such as rubber. In this case, it is desirable to provide the protruding seal ridge with a rounded portion that merges with the inner seven-lung curve of the current flange.

According to this, even though the 7-lunge connection screw is only tightened relatively slightly, the provision of the sealing ridge, i.e. the thickening of the wall of the roll membrane, allows the roll membrane to form an inner annular shape of the housing half-closed at its outer edge. Always tightly tightened between the flanges.

That is, when increasing the internal pressure of the housing, the flange area of the roll membrane, due to the thickening of the material according to the invention, is pressed between the transition area of the housing pan into the housing current 7 flange, and thus the pressure medium The necessary sealing pressure for losses of 2 is generated by the pressure medium itself, without the need to press the annular 7-flange of the housing space too strongly against the outer edge of the roll membrane.

In order to solve the first part of the above-mentioned problem, the invention provides that the roll membrane includes, at its inner edge, i.e. in the cylindrical clamping area with the spring plate, a groove-like thickening, which It can be engaged in a corresponding groove on the outside of the cylindrical edge of the dish. A tension band connecting the cylindrical inner edge of the roll membrane to the cylindrical blood edge of the spring plate ensures the connection between the thickened part of the membrane and the groove even if the roll membrane is folded back in the wrong direction. continues to be. In order to reliably prevent axial displacement of the tension band, i.e. tension/g, even if the roll membrane is folded back inadvertently, according to the invention a further thickening is provided on the cylindrical rim of the spring plate. These can be deployed and form recessed guides therein, by means of which the tension band is held against displacement in the yoke line direction.

If a rolled membrane with an inclusion such as a textile material is utilized, the sealing ridge 8 is arranged to protrude from the rolled membrane on the opposite side of the textile insert.

According to the T1 preferred embodiment of the invention, the textile insert runs in the center of the cross-section of the roll membrane in the area where the outer edge of the roll membrane is clamped between the flanges of the housing, but under the pressure of the roll membrane in the roll area. To be located in the opposite direction,
Place one layer into the roll film. According to this, although the roll membrane becomes elastic evenly in the transverse direction in the dispensing area,
In a case where the rolling inclusion is normally placed on the / side, the degree of deformation of the roll membrane parallel to the surface at the inclusion center I is also smaller on the opposite side of the fabric inclusion.

Embodiments of the present invention will be described in detail below with reference to the drawings.

The membrane regulator (membrane regulating motor) selected as an embodiment capable of achieving reversible pressure medium control is a pan-shaped blood drawer (spring,
tm) has a working membrane body consisting of i and a roll membrane,
Roll membrane - tension band 3 on cylindrical rim 6 of blood removal l
Fixed by This blood removal l receives a return spring,
This is achieved in this embodiment by the axis of the central actuating rod S.

The position of the return spring 1 can be held by the central protrusion g of the blood drawer 1.

The actuation membrane body l, ko and return spring are reversibly or reversibly attached to the membrane housing, which is constituted by an upper housing half 10 and a lower housing half 10. The connection of the housing halves is achieved at these annular flanges /q and lS by screws 16. Annular flange lda and iso
In between, the outer edge /l of the roll membrane at each turned-over position of the working membrane bodies l, can be firmly tightened. The cylindrical rim also serves to limit the movement path of blood removal.

The end of the actuating rod S that projects into the membrane housing 10 is provided with a thread. Thereby, the central area of the blood drain in each everting position with a corresponding aperture is fixed to the drawing rod S by the nut.

The actuating rod S passes through a through-sleeve l installed in the bottom of the housing half 9 on the side of the bulge housing adjacent to the poppet of the mechanism to be controlled, e.g. a valve, to the current seal 1
g and are guided outward from the membrane housing. Here, the actuating rod S can be connected to a valve stem, e.g. a control valve, by means of the implicitly indicated connection means 13. Connection means/3
The deflection of the return springer can also be achieved at the same time by
No special spring biasing devices are required which would increase the height of the device.

The upper membrane housing half 9 is provided with a pressure medium inlet (pressure medium inlet short pipe) i9, and the lower membrane housing half 1O is provided with a pressure medium inlet (pressure medium inlet short pipe) co0. According to the desired direction of action, the inlet (inlet short tube) 19. - One of the holes can be connected to a pressure manipulation channel or a pulse channel, and the other inlet can serve as a breathing opening. If the
For example, in order to close the valve to be actuated against the action of a return spring, a control pulse is applied via the inlet l to the actuating membrane l,-. After turning over the actuating membrane body /, - by 1gO° and replacing the return spring l/- accordingly,
A control pulse is sent through 0.

As the pulse pressure increases, the valve opens against the action of the return spring.

One roll is a housing plate (housing half-closed),
At the transition of the roll area of this roll group to the outer edge of this roll membrane, which can be placed between the annular flange l of the IO and the inside of the housing, a pressure force a1 is applied. Seal ridge exposed to internal pressure in space -
1, which is formed by thickening the membrane wall or elastomeric membrane material. In this case, it is desirable that the two protruding seal edges have rounded portions 21I that match the inner flange bends 23. The thickened part according to the invention, namely the sea/L bulge, is strongly pressed against the rounded part of the annular flange ls by the pressure medium introduced into the housing space, and is the opposite of the rolled membrane. The section is pressed against the inwardly rounded section of the filamentous 7-lunger. According to this method, the housing halves are moved by the action of the pressure medium during the operation of the foot adjuster.

A perfect comrade-like seal is automatically achieved, and it is entirely sufficient to hold the annular 7 flange lug, /3 together by the screw /6 without significant force.

Preferably, the roll membrane contains an enclosure consisting of a textile tag or the like.
Consists of enstoma fees combined with 5. The input material 5 on the processing side generally resides in the non-pressure area of the roll membrane. In this way, the sealing ridge-1 protrudes on the opposite side of the roll membrane, as clearly shown in Figure 1.

According to the invention, the outer part, 25', of the dense inclusion S is also arranged so as to run through the center of the cross-section of the coffin 1 of the membrane wall, as shown in FIG.

The cylindrical blood rim 6 of the spring plate (blood removal) is provided with a grooved roller on its outside, into which the inner protrusion 27 of the inner edge saw of the roll membrane can engage. According to the present invention, when the manufacturing tolerance of the groove roller and the tower-like projection-7 is large, m
It is desirable to provide an inner annular sealing protrusion -g that can make contact with the outside of the l k bO on the inner edge of the roll film in terms of MP. According to this, an even better seal is ensured.

In order to keep the position of the tension band 3 so that it does not move in the direction of flow, it is guided according to the invention between the inner fold/- and the outer cone 30 of the roll membrane. The tension band 3 itself is tightened by a tension screw 3/, as shown in Figure 1.

The invention is not otherwise limited to the embodiments described and illustrated, but encompasses all variations within the scope of the actual inventive characteristics.

[Brief explanation of the drawing]

1 is a vertical longitudinal sectional view of a membrane regulator with a valve capable of reversing the operation of the pressure medium; FIG. 1 is a partially enlarged sectional view of the roll membrane and spring plate; FIG. 3 is a roll membrane according to FIG. FIG. 4 is a diagram showing a modification of the roll film according to FIGS. 1 and 3, and the WS diagram is a partial sectional view of the spring plate. In the drawing, l is a spring plate, ko is a roll membrane, 3 is a tension band, da is a return spring, 6 is a blood relation, wa and IO are housing half holes, ll is an outer edge, no is an inner edge, lg and nos are annular flanges , -ll is the roll area 1.2 is the sealing ridge, -
3 is the flange bend, -da is the rounded part, -5 is the incoming part,
The roller is the groove, the core is the inner china-shaped projection, -g is the seal projection,
−9 and 3θ indicate the outer annular projection.

Claims (1)

[Claims] l It has a roll membrane to which a pressure medium can be applied, the outer edge of the roll membrane can be tightened between the dish-shaped 71 ring-shaped flange of the membrane housing, and the inner edge of the roll membrane , which is fixed to the cylindrical rim of a spring disk which is acted upon by at least one return spring and which is connected to the actuating rod, and in which the roll membrane, together with its spring disk, can be selectively connected to the pressure medium channel. In a membrane housing with two pressure medium inlets, one
In a membrane regulator that can change g00 direction, roll membrane (,2)
However, the annular flange (/
Da. The outer edge of this roll membrane (//) which can be tightened during tS)
The transition of the roll area (col) of this roll membrane to the membrane is provided with a sealing ridge (-1) which is exposed to the internal pressure of the nozzle space to which the pressure medium is applied, which is formed by a thickening of the membrane wall. A membrane regulator characterized by: 3. The membrane regulator according to claim 1, wherein the protruding seal ridge has an inward seven-lunged portion or a rounded portion (-q) adapted to the IB (23). Equipped with an inclusion (coS) and a seal ridge (
-1) The membrane regulator according to claim 1 or 1, wherein the membrane regulator protrudes on the side of the roll membrane opposite to the non-pressure body of the roll membrane containing the inclusions. The membrane regulator according to claim 3, wherein the inclusion (S') runs in the center of the cross-section of the membrane thickness at the clampable outer edge (/l) of the roll cup. The cylindrical plate k (6) of the left spring plate (1) has an inner annular projection (-7
2. Membrane regulator according to any one of claims 1 to 1q, comprising a groove (2A) serving to accommodate a membrane (2A). The inside h (l) of the roll membrane (k) is the plate k (k) of the spring plate.
6) A membrane regulator according to claim 5, additionally comprising an inner annular sealing projection (-g) contacting the outside of the membrane regulator. Tension band (3) holding the inner part of the crawl membrane (-)@(t, r) against the cylindrical rim (6) of the spring plate (i)
6, wherein the tension band is guided between one outer annular projection (9.30) of the roll membrane (-). Membrane regulator.