DE8620263U1 - Diaphragm valve - Google Patents

Description

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07/21/1986 DESCRIPTION Sr / Öa

DIAPHRAGM VALVE
State of the art, task, solution

The invention relates to a diaphragm valve with the nörkiiiälufi mentioned in the Oberbeg of claim 1. The terms appearing in the claims are used. B. in the chemical industry and the beverage industry.

With a known type of membrane valve, the sealing force depends on the tightening torque. The valve is operated by hand using the crank arm Sensitively closed until the operator suspects that the flow of the medium through the pipe to be shut off is complete is stopped. Often forces of up to 7000 N were applied and so that the membrane made of rubber is compressed to an inadmissible degree. There was a high level of wear on the membranes.

Conversely, when the valve is opened, it is turned until the one-piece pressure plate unit against the spindle mount bumped. This Varstellueg is relatively ueit. As a result, the membrane

upside down. This led to rapid wear on the outer edge of the Membrane.

The present invention is intended to provide a diaphragm valve so that the varstalluag, the pressure allarainhait gagan the diaphragm, the maximum force that can be exerted by the pressureallarainhait on the mambran is limited.

DiBsa problem is solved by the invention according to claim 1.

By arranging at least one compression spring in cooperation with

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Then there is a stop so that only a maximum of force can be exerted on the membrane, which depends on the one hand on the measurement of the fsdar (s) and on the other hand on the position of the first stop. Regardless of the degree to which the valve is turned off by operation, only a predetermined force can be exerted on the membrane and by this on the transverse rib of the pipe section.

Developments of the invention

According to claim 2 it can also be achieved that the opening stroke the membrane is limited, so that the above-described everting of the Membrane is avoided.

While it is in principle possible to get by with a one-piece pressure tellar unit and a single pressure fader, a particularly uniform force distribution can be achieved according to claim 3.

Other advantageous features emerge from the remaining subclaims.

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Execution example with further features of the invention üerden in described below with reference to the drawings.

Figure 1 is a longitudinal section through the housing, the spindle mount with spindle, the pressure divider unit and the membrane corresponding to a plane I - I in FIG. 4.

Figure 2 Zuiyt ± iü i_äny35ünCiiot uSfi ZüySi lüriySri πΰιιΓ5υ5ΰιliou.

FIG. 3 is a longitudinal section corresponding to FIG. 1 in a plane III-III in FIG. 4, but does not show the membrane.

FIG. 4 is a plan view of the pressure plate from the plane IU-IU in Figure 1.

Figure 5 is a cross-section through the pipe section according to plane U-U in Figure 2.

In the following description, terms such as “above”, “below” and the like relate to the position of the parts in FIGS. 1 to 3 and 5.

Figures 2 and 5 show a pipe section, each of which has a connecting flange 12 at its ends for installation in a pipeline and in its center on one side a relatively wide circular opening 14 with an annular, uulstärtigen seat 16 for the membrane 18 (Figure 1). The wall 2Q of the tubular section opposite the seat 16 is drawn in against the seat, thereby forming a rib 22, which, as shown in FIG. 5, runs concave over the seat 16.

In the state of use, the membrane made of rubber or synthetic rubber sits 18 in the opening 14, with its edge on the seat 16.

As shown in the figure at 1, 3 and 4, the one designated as a whole is designated as 3D Printing plate held in a printing tallar 32 and in a printing plate

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te 34 Divided. The membrane 18 is fastened to the pressure roller 32 with the aid of an aingaformtari screw 31. Pressure ball and pressure plate haban \ ιίβτ cylindrical WartiafUngan 36 j 37, which form a receptacle for compression springs 39 in the form of v / on disc springs or coil springs. The pressure plate 34 and the pressure plate 32 are connected to one another by four screws 42 which grip through the pressure springs, are screwed into the pressure plate 32 and yöätättsn a displacement of the pressure plate 34 on their shafts. As achr-aubsn uiird dar Fsdörwsg ut sd thus the maximum distance between the printing plate and the printing plate is limited to the position shown in FIG. The compression springs are tightened by tightening the screws 42 on z. B. 900 to 1000 N v / tensioned.

The pressure valley unit 30 is axially adjustable in a housing 46 housed, Jas in turn on the pipe section 10 by one here union nut, not shown, which can be screwed onto a Gauinda flange 43 surrounding the opening 14, is to be attached. In order to the membrane 18 is also fixed on its seat 16 with a seal.

The inside of the housing 46 has an axially parallel rib 48 which forms a rotation lock for the pressure plate unit. Printing Tallsr and Printing Plate each have a lateral channel-shaped groove encompassing the rib with play Recess 50 (Figure 4).

A spindle 52 is used to adjust the pressure plate unit relative to the housing, the lower end of which engages with play in a central opening 44 of the pressure plate 34. A pin 56 is driven into a transverse bore in the pressure plate and surrounds the lower end of the spindle with play. The Spindal is thus fixed in the pressure plate 34 in a galankig and wire-fast manner.

DiB Spindal 52 has a left-hand thread in its main section, with which it engages in the internal thread of a spindle receptacle 54. The spindle mount 54 is rotatable in a cylindrical bore of the housing 46 and has an outer flange 54.1 underneath. Between the diasam and the associated inner wall of the housing 46 there is a sealing

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ring 55. Outside the housing 46, the spindle receptacle 54 has a Square section 57 serves to hold a crank arm. Nit With the aid of the crank arm, the spindle receptacle 54 can be rotated within the housing 46 and the spindle 52 can thus be displaced in the axial direction will. The spindle uird by the pressure plate 34, the rib 48 and the pin 56 held in a rotationally fixed manner.

The Spindsl has a Geuind section 58 at its upper end. It has has a smaller diameter than the main portion 53 of the spindle and has a right-hand thread. A pot-shaped flutter 60 is screwed onto the rock section 58. The spindle receptacle 54 expands in sinsr Schultsr 61, which together with the lower edge of the mother den "first" stop forms. By turning the mutier on the threaded portion 58, the Ueg can be limited, which the spindle 52 downwards can be screwed. Depending on the maximum adjustment value and the Fsdsrkonstantsn can thus be the maximum at the first stop set possible closing force. Sis can e.g. B. set to 1,600 N, sin Usrt, which is sufficient to shut off the flow and is harmless to the membrane.

The maximum opening movement is limited by the fact that the upper surface 65 of the pressure plate 34 against the base surface 64 of the spindle receptacle 54 bumps. This forms the "second" stop. Compared to previously known Flembranventilsn, this stop limits the opening of the pressure plate unit to such a short Ueg that the undesired eversion of the membrane is avoided.

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REFERENCE MARK

10 Pipe section 12th Connecting flange 14th opening 16 Seat 18th membrane 20th Uand 22nd rib 30th Pressure actuator unit 31 screw 32 Drucktsllsr 34 printing plate 36, 37 deepening 39 Compression spring 42 screw 43 Gauinda flange 44 opening 46 casing 48 rib 52 spindle 53 Main section 54 Spindle mount 54.1 Outer flange 56 Pen 57 Square section 58 Gauinde section 60 mother 61 shoulder 64 Baaisfläche 65 obara flax

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Claims (6)

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1. Mambranv / antil with following characteristics: a) a pipe section (1O) has aina saitlicha opening (14), dia ainan ring-shaped seat (16) for aina as a Vantilalamant the nanda membrane (18) made of elastic material, in particular rubber or synthetic rubber, b) the pipe section has innan aina transverse rib (rib 22) to which the membrane can be pressed to shut off the flow, c) the membrane is attached in its center to a pressure plate unit (30), d) a (Geui * da-) spindle (52) is used to adjust the pressure plate unit relative to the transverse rib and is mounted in a spindle mount (54) with an internal thread, ·) A dia opening the Rahrabschnitts closes the housing (46) surrounds the spindle and its receptacle (54), and outside the housing there is an actuation device (in particular a manually operated crank arm) arranged for turning the spindle, characterized by the following features: f) at least one compression spring (39) is connected between the spindle (52) and the diaphragm, g) there is a (in particular adjustable) first stop (60, .6.1) Uorgasahan ,, dar dan Uaratailueg; ■■■ Spindle opposite .which at least ainan pressure radar and thus limits the pressure force. * * ** i I * it ti * * i * it it it * * 4 ti * ι i does • * * I * it «it * <I »4 111 If I» I 4 »4 »I» 1 M j I J »J I "» J i 1 - 2 - sbs-10-de 2. Diaphragm valve according to claim 1, characterized in that there is also provided a stop (64, 65) which limits the opening stroke of the pressure tallar unit 30) and thus the diaphragm (1B). 3. Clembranuent.il according to claim 1 or 2, characterized by the following de features: a) the pressure plate unit (30) is transverse to the axis of the ^ arstellbeuichtung divided into a pressure plate (34) connected to the spindle and a pressure plate (32) connected to the membrane, b) in the ring around the adjustment axis are several compression springs (39) arranged, which is on the pressure plate (34) and the Drucktaller (32). 4. Diaphragm valve according to claim 3, characterized in that the screws (42) guided by the compression springs (39) determine the maximum distance between the pressure plate and pressure plate, and that one of these parts is guided displaceably on the shafts of the screws. 5. Diaphragm valve according to claim 1, characterized in that a nut (60) which surrounds an outer thread section (58) of the spindle and an annular surface (shoulder 61) of the spindle receptacle (54) are used to form the first stop. 6. Diaphragm valve according to Claim 2, characterized in that the surfaces of the pressure plate (34) and the Spindelaufnähme (54) serve to form the second stop against each other. • Il Il Ii 4 · » I ill · ·· • »ti II ·« iff ί * · · »Lit I · · • i I f i 1 i ·· ■ * · *