DE2140348C - Pressure medium operated diaphragm valve with an optional stuffing box - Google Patents

Description

50

The invention relates to a pressure medium-operated, in particular a pneumatic diaphragm valve one by stud bolts or the like. Connected to the valve housing, by one on both sides with the Actuating pressure medium, actuator diaphragm divided into two diaphragm chambers, diaphragm housing, through its diaphragm housing part which faces the valve housing and is provided with a feed-through opening one connected to the diaphragm plate of the drive diaphragm and actuating the valve cone Adjusting rod is passed axially displaceably.

In the normal case, the actuating pressure medium is only in the initiated away from the valve housing membrane chamber of the membrane housing, so that for the Leading out of the control rod from the diaphragm housing no stuffing box is required. The diaphragm valve works as a closing valve, i.e. it is closed when the signal pressure rises. That the The diaphragm housing part facing the valve housing has a simple, central passage opening Bore that surrounds the control rod with sufficient play.

If, on the other hand, the diaphragm valve is used as an opening valve! work, d. H. opened when the signal pressure rises is to be, or if it is to be controlled by a differential pressure, the signal pressure or the relevant partial pressure act on the surface of the drive diaphragm facing the valve housing or also apply. The control rod then has to pass through a stuffing box at its point of implementation be sealed. For this purpose, a special embodiment of the valve housing has so far been used facing diaphragm housing part used, which is equipped with the required stuffing box was. Such special parts had to be manufactured and kept in stock for each diaphragm valve size will. The manufacture and distribution of such; Diaphragm valves was accordingly uneconomical.

The inventors have therefore looked for means and ways to achieve a more efficient production and a much more lateral practical use of such Merr, to enable branch valves as required.

This object is achieved according to the present invention in that the valve g ^. housing facing side of with the implementation opening for the adjusting rod provided membrane ^ c housing part a hollow support with one of the Durchfüi opening opposite opening or recess is arranged, the interior of which to wan! weise.i recording of the implementation of the control rod to the outside sealing gland is arranged.

It is thereby achieved in a simple manner that the membrane housing facing the valve housing :! and thus also the diaphragm housing as a whole for all possible uses of the diaphragm valve can be used in one and the same basic version. When the diaphragm valve as a closing valve is to work, the interior of the hollow carrier remains unfilled. But should the diaphragm valve work as an opening valve or as a differential pressure valve, it is sufficient to go into the interior of the hollow Carrier to insert a gland suitable for the control rod, which is then used in these special cases necessary sealing of the relevant membrane chamber of the membrane housing ensures. The inefficient one Manufacture of different embodiments of the membrane housing parts and their respective This saves assembly with the other parts of the diaphragm drive. Furthermore, the Warehousing in the manufacturing plant and at the individual delivery points simplified and cheaper. According to the invention it is possible with a relatively small inventory of these unit diaphragm valves all practically occurring combinations of valve sizes with diaphragm actuator sizes to be put together immediately, although the installation of the stuffing box may not be necessary Difficulties and can be carried out by any fitter.

The invention can be practiced in various ways. According to one particular simple and advantageous embodiment of the invention, the hollow carrier consists of a U-shaped

_mi g profiled traverse, the open side of which runs across the outer surface of the relevant diaphragm housing part facing the valve housing, so that the through-hole in the base of the U-profile is aligned with the through-opening of the diaphragm housing part, and on the one hand with this diaphragm housing part and on the other hand verbuaden with the stud bolts of the diaphragm valve, preferably screwed. Between Shblhb ii Mittltil des

hertenTrav

In the cavity

another, e.g. tubular connecting link provided

be seen. ., * J %,

The drive diaphragm 10 is stiffened on both sides by diaphragm plates 11 and 12 and is marked with ■ dei: an threaded rod S screwed by means of a nut 13 at its end. The membrane plate 11 rests against a shoulder i4 of the control rod 5. The drive diaphragm Ii> is on yours

connected, preferably screwed. Between the circumferential edge between a flange of the membrane stud screw connections is in the middle part of the housing part 6 and a corresponding ™ πμ. ι Traversenhohlraumes, where the control rod through an outer membrane housing part is spd mi. The two housing parts 6 and 15 are on the Inrenridu stuffing box. This is, if it is required, simply connected to one another by means of nut screws 16 during the assembly of the diaphragm valve. The membrane housing part IS umgioi. eme the crossmember is inserted and when screwing i DER ₅ membrane chamber 17 and has clamped a DrucKmlueieinselben with the membrane housing part. let socket 29, during the membrane breakdown

The stuffing box itself can here with the help of "w._u."" _Tn " _mPr i "and with e.nem a sealing ring between the outer surface
of the diaphragm housing part and the end face of the stuffing sleeve housing adjacent to it
against the associated MeTibrar.kammer or
be sealed to the outside.

In the drawing, the invention is illustrated in one embodiment, for example.

Fig. 1 shows partly in side view, partly in the longitudinal 35 control rod 5 egg cut as a unit valve according to the invention has a «♦" "**>" designed diaphragm valve, and

F i g. 2 shows a larger-scale cross-section through the stuffing box support with inserted stuffing box.

In the illustrated embodiment of the invention, the hollow gland support consists of a U-shaped profiled traverse 1, which at both ends with the threaded ends of the Stud 2 is screwed by means of nuts 3. The other ends of the stud bolts 2 are over a Flange 26 attached to valve housing 27. The traverse 1 has a hole in the middle of its base 4 for the implementation of an adjusting rod 5.

The traverse 1 runs with its open side against the dia- 40 socket 20
metrically over the valve housing 27 filleted brangehäuses.
Outer surface of a diaphragm housing part 6 ,. whose if the

flat bottom also with a central through-used wire,

Guide opening 7 for the control rod 5 is provided. ^{replaces them} the inlet port 29 under pressure S
On the bottom surface of the diaphragm housing part 6 are 45 Then a stuffing box is superfluous, and the bten- - - - ■ · ~ '- * - .. i ^ u " λ ·. * Ίίαηο ^ ς hp.weet freely through the implementation

let stutzen, ^ β

_{a membrane chamber} 18 "^ open

Pressure medium inlet port 30 versehe _ran _

^de [ ^Auße f ^a ? ^ ffL vdung of the U-shaped profi- ^^ S efn cavity 19.

^ ^ _Zusa mmen-

In the ^ ^K membrane housing

screw the J «verselunQ α _{sealing the}

teles 6 one piece for stuffing box 20

ld ^ P _dense _

use ^ w _dichüip

TSStoansd Su 5ri voSef hose spring ^! ^^ sniffed to the circumferential surface of the 23 ^ all around _ & ^^ 8 stuffing box cover

S has el ^ i "Ä _excluding esparten Her paragraph. to-24 a ringtormig, g * ν _{wd of the stuffing.} Together with dei ^" W nzenden to g ^

^^ ⁿ ^ ^from "! 1 '^ SS is inserted. If? -Rmg 25 from Dwhtun ^ ten ^ M ^ g ^

the ^ JJ «« ^^ from the membrane * \ Ί ™ ^ ₆ ® & * Ζ: ^ Λ the stuffing box 2β double housing part «6 pulled uni ^ the si P" _over _

see the parts «! and 6 estg ^ JJJ _sf .

takes the O-Rmg * «ζ ™haben f _{8 of the M} emd MbKammer

Closing valve

Four threaded bolts are welded to the bottom surface of the diaphragm, onto which the foot flanges provided with corresponding holes 28 of the traverse 1 are attached and fastened by means of nuts 9. The through hole 4 the cross member 1 is axially aligned with the bushing:; - opening 7 of the membrane housing element 6. On d, ese The diaphragm drive housing is connected to the valve housing 27 by the stud bolts 2. Instead of the stud 2, a rod could also move ^

the trav opening valve work

g, £ _f " _h

S _I ^ useteund ™ the diaphragm valve as

w _Di ff _er enz-

Pressure in both Mem- Si ^^ adA, so single-J ^ X 20 needs to m aen the Stppfbucöee _{in the cavity 19 of the trahch}

verse 1 to be incorporated.

To do this, 1 sheet of drawing boys

Claims (3)

Patent claims: 1. Pressure medium-operated, in particular pneumatic Diaphragm valve mi: one connected to the valve housing by stud bolts or the like, by means of an actuator diaphragm that can be acted upon by the actuating pressure medium on both sides in two Diaphragm chambers subdivided membrane housing, through which the valve housing turned, with a through-opening provided membrane housing parts with the membrane plate the actuator diaphragm, which is connected to the actuating rod and actuates the valve cone, is axially displaceable is passed through, characterized in that on the side facing the valve housing (27) with the passage opening (7) for the adjusting rod (5) provided diaphragm housing part (6) a hollow carrier arranged with an opening or recess opposite the lead-through opening (7) is, the interior of which is for the true reception of the implementation of the control rod (S) to the outside sealing gland (20) is set up. 2. Diaphragm valve nacfi claim 1, characterized in that the ho'nle carrier consists of a U-shaped profiled traverse (1) is made with the open side of its to accommodate the Stuffing box (20) set up cavity (19) diametrically above the valve housing (27) facing Outer surface of the diaphragm housing part (G) runs so that the base of the U-profile in ^ cr the traverse (1) is located through hole (4) with the through opening (7) of the Membrane housing part (6) is aligned, and on the one hand with this membrane housing part (6) and on the other hand is connected to the stud bolt (2) of the diaphragm valve, preferably screwed. 3. Diaphragm valve according to claim 1 and 2, characterized in that the into the cavity (19) the traverse (1) inserted stuffing box (28) by means of a sealing ring (25) between the outer surface of the Iviembrangehäuseteiles (6) and the adjacent end face of the Stuffing box is arranged, is sealed against the diaphragm chamber (18) or to the outside.