DE1803360C3 - Arrangement for pressure control of flowing media - Google Patents

Description

) exactly

2n ^ H ^e L ^ne _t ^m _t ^{dem Beauf} "u ^{) the actuation un} gsmem- ^ ordered (32, 32) consists.

¹¹⁰ rdnung according to claim 1, characterized · HMv & mdungsleitung it into existing se Z- _h VP ^{eT verb} (20 ',

?? "' ^rHa " P ^tvorIaufle itung (14', 14 ") Wh

Counterforce with a fluid pressure _{which is derived from the} main flow of the system and regulated by means of an adjustable auxiliary regulator.

Such a control arrangement can also be used, for example for heating oil systems, steam systems, ventilation and air conditioning systems as well as district heating systems

It is known that the pressure and volume control in hot water systems is independent of external energy and accurate regulators are required. Regulators are already known for this purpose become, in which the pressure to be regulated is directly applied to an actuating diaphragm for actuation

5 ΐί ^{Flow s} mean pressure of an actuator or a valve plug

^ι Γ ^ i ^{Om Hau} P ^{tvorIauf the} system off i ₅ acts as a counter force svährend a prestressed Fe-T by means of an adjustable Hilfsregiers of an attacking or via a lever arm Geit characterized in weight is used. These regulators have indeed -i good re-! ^{"Sregier a} ^, ^a gelgenauigkeit ^In the flow, especially those with application na ^'ta? £ j ^{2?' 29) to tHe Press shutter} NGS strength" of drag by weight are, but in the Re-7 ™, ^(I9 ' ^I9 ), of ^the actuator (18', 18 ") so gel can only be used up to a diameter of the valve-arranged throttle element (33, 33") with an exactly closing piece of about 40 mm.

iäSi; ^SS S ^fn ^ ^{Ud e} L ^{ne d Bf In the case of} controllers with a larger nominal size, however, dk-

Counterforce acting on the membrane is not applied by a spring or a weight, but rather _{by a pre-regulated pressure acting on the membrane} , which is generally derived from a main supply line at an increased pressure level tx. This will make the

?,? ρP ^orIaufle itung (14, 14) use of large effective membrane areas w η Wannwawrheizungsaniage 30 possible so that the control deviations as a result Rei-H i ^UCKlau i ^leitu "g ⁽³⁰ · ³⁰⁾ bung arranged closing pressure and DruckschwLkungen belie H ^Z n ^1SC uK ⁿ , ^{m Dr} - ^sseIor g ^a n (33 ', big can be kept small. The ^{pressure acting on the beetles "1} U i ^a ' Tll ^{tll (} ? ^{2 '32} " ^{) the} pressure acting with the diaphragm to generate S? M' ^ ' f ^be f ^fschIa g ^{te Beauf} - a counterforce is thereby connected by an auxiliary rule, ". lehuS Si '? ^{} to this connection} consisting of a pressure reducer and a line, _constant media flow through the ™ pressure reducer.

iwhΑ " ^Ordnu " ^{g na} i ^h _o ^Ans P ^r "ch 1 or 2, rer enabling throttle point with defined Li fTJS ^{t dß d Rli} throttle opening, kept constant.

^{Bd e1ner} ^ ^known Räelanlage for hot water heating with actuation of the actuation mem-S «» »r actuation of a valve closure piece ^{by a pre-} regulated pressure to generate the counterforce on the membrane is this pressurization of the membrane from the? Main ^{supply lines} ™ via an adjustable pressure reducer. As is well known, such a pressure reducer only a pressure reduction to a constant pressure be ^{act 'when a Steti} S ^{e Ström} ung of the medium overall

»? ΐ ^gene provides ^true is that for supplying the vorgere ^{m dl} f ^RuckIauf - 5 'apply pressure to the membrane serving line "" XT "° ^ ^Ha uptrücklaufleitung the hot water heating ^anla ge in a substantially lower pressure than in the flow prevails. , via another line in which there is a throttle point with a precisely defined throttle opening. The other side of the actuating membrane is pressurized with pressure from the flow line of the system, i.e. with the pressure regulated by the control system that of this pressure on the ^Membra "erzeut Vtllkäf i lih

Α " ^Ordnu " ^{g na} i ^h _o ^Ans P ^r "ch 1 or 2, fTJS ^{eti that the Re} 8 ^{elventiI as} 7ΐ iV ^hd

SSfldtun,
z BS

thereby SkT! [ _h ^g

v, n- ^{UptVOr flow line} ( ¹⁵ ')>

^{Hot water heating} -

' ^Or2 '

tune IS) n "H i R- Z n ^{n dCT} ^} Ser WarLw-i π ' ^Ruckiau , ^fleitun g ( ³⁰ λ ^ B. 5 Re ^ lInrHn ^ßSa i! ⁸ λ' ^an ß ^e ° ^{rdnet is} " f TL "" ΐ ^? ' ^{d /}

5 Re ^ lInrHn
or 2 df by T
veniil f S

" ^U " ^{d / RegeN}

is born

^{Pressure hold} "g ^a "

'he invention relates to vh i * δ α

g kt in the direction of this pressure at the

Slightly superiors ^VOrzU ^ ^wei f ^{6o Membra} "adjustment forces produced a

3 I ₄

? hliΑ'Ι ^ ΐΓίίΤ ν '' π ^Zlir ™ γ ^ ^η & ™ ö.i ^ proposed HiHsregierges.altung Mein

«For R,"?

If the Buatigungsmemnran under this pressure Buursehlagungsraum d / r Beiicherungmcmbran over

bcaul ^ Llagung emc displacement in the sense emer the throttling in connection with the hour

The valve closure is closed, 5 main flow lines, and the pressure is set

soot on the opposite side of the membrane via the outflow side of this impingement space

the Stm- assigned pressure control valve to the assigned pressurization space. If at this

Mungsmilte flow off what about the Drossdstelie m order the other side of the operating membrane

the ventilation to the return line of the heating, increased pressurization and thus the

system takes place. Since this damming point in the _I0 actuation membrane is a shift in the sense of a

Zeiic.iiiieit only experiences a small flow rate through the closing movement of the valve plug,

nut permitted, occurs in the bcauf via the auxiliary regulator- can be pressurized from your with pre-regulated pressure-

The pressure chamber increases the pressure.

e.

line located pressure reducer closes so that, ₅ pressure chamber arranged pressure control valve at

no further stream center! from the main flow - keeping the pre-regulated pressure constant-

leiuing can get to the loading area, men.

on the other hand, a sluggish response of the entire Re- As is known, such a pressure holding valve opens

gelanage causes this inertia of the control system when the admitted target pressure is exceeded, see above

canoe because of the penetration of thrusts ao that a quick response of the control arrangement

through the control valve in the flow line, e.g. guaranteed. From the main flow line

a house system, to a risk of the control valve in the house in the flow line.

installed radiators. _low pressure surges thus cause the corresponding

Throttling organs with relatively small throttling pressures on the actuating diaphragm

As is known, lockings always provide an immediate closing of the valve closure piece,

are very difficult components in control systems. So that such pressure surges are reduced immediately

away from the flowing medium.

carries with it, which is not always possible with certainty.

is to be avoided, for example, blockage of a selector occurs with the control arrangement according to the invention

enter such a throttle point. Otherwise, no endangerment of the control arrangement can be made

In hot water systems there are also minerals in the downstream system, since in this case the

term narrow throttle bodies deposit, resulting in a pre-regulated pressure to generate a counterforce

So-called overgrowths of these throttles lead to the membrane gradually falling off and therefore that

can. In the event of a blockage, the throttle point of the valve closure piece moves into its closed position.

Auxiliary controller of the control system described above is 35 The control system according to the invention is therefore

the entire control system is inoperable, as this, like the well-known control system, is

to apply a counterforce to the diaphragm at the end of the throttle opening inoperable, however

serving fluid from the assigned loading not in such a way that this becomes a hazard

then can no longer flow away from the serving area. a hot water to be regulated by the control arrangement

In view of the behavior of the water heating system set out above, the known control system appears. Control system according to the invention throttles the warm water for pressure control for flowing media, nor water supply to such a system, which needs further improvement. The task of the present throttle point closure is increasingly the elimination of the disadvantages that are inherent in the previously known control system until the throttle is completely closed Shuts off such a heating system from deviations in the actual value from the setpoint of the supply line to be removed,
Gelnder: Pressure responds quickly and also in the case of a throttle point increasing to no danger. leads. serheizungsaniage and the flow line, z. B. the

Starting from a control arrangement of a house flow, or the arrangement mentioned at the outset, the invention can also be made in such a way that the object is achieved in that the auxiliary control valve acts as an overflow valve between the primary regulator one in the fluid supply line 55 and ^{one in} the return line of such a system to the actuating diaphragm of the actuator is located and be arranged in the return diaphragm of the actuator on the outflow side of the inlet line

The auxiliary regulator can advantageously be made possible in the manner previously described

known way in a connecting line between In the following the invention is based on the

see the Hauptvorldufleitung, for example a schematic drawings are explained in more detail, with

Hot water heating system and its return line for a better understanding of the above

device to which the control system known with the pre-regulated 65 is assumed. It shows

th pressurized loading space of FIG. 1 the previously known control system,

Actuating membrane between the throttle member Fig. 2 with the control arrangement according to the invention

and the pressure control valve is connected as a pressure reducer and the control valve

I · 'i g. 3 also the Regclan medium according to the invention when flowing through the via the front

position to be supplied with the consumer to be supplied with the control flow line 15 used as an overflow valve

Valve. dig suffers a pressure drop, the pressure level is

Hei the known control system is in the return line 30 below the pressure level ii

one located in a Wumiwusscrhcizungsanlugc 5 the supply lines 14 and 15. Druckrecgehmordiuing. which essentially consist of an operation of the control system described are di <

Control valve with a fluid pressure loading spaces 20, 21 of the actuator 18 to

impactable actuator and an auxiliary control for both ropes of the operating membrane 19 mi

Consistent with a cinwir fluid pressure applied to the actuator. To Beaufschla

no form exists. The control valve 10 moves the impact space 20 flows out of the

sits a valve seat 11 and a closure piece 12, main flow line 14 fluid higher

which is between a maximum opening position and pressure in the line 29, experiences with the flow

its closing position when sitting on the valve seat mung of the pressure reducing valve 32 a pressure reduction

is movable. The control valve is between a the tion to a set pressure value and succeeded

The main flow line 15 supplying the flowing medium finally via the throttle point 33 in the return

14 and a flow line 15. ζ. B. the house pipe 30. There is thus a constant flow

running of the heating system. The flow of small flow from the main fore

direction of the medium is in the main flow line 14 in the return line 30 before where

14 indicated by the arrow 16. by the function of the pressure reducing valve 3;

The ensured by fluid pressure 20 and the pressure level in the intermediate

The valve actuator 18 can be actuated directly on the pressure reducing valve 32 and the throttle point 3:

the housing of the control valve 10 flanged. The lying section of the line 29 is turned on

Actuator has an actuation membrane 19, the set value is kept constant. About the Leitunj

the interior of the Vcrstellantriebsgehäuses in two 28, which in the mentioned section between the

Loading chambers 20, 21 divided. The Be as pressure reducing valve 32 and the throttle point 33 ar

The actuation diaphragm is designed as a pot diaphragm, the line 29 is connected, diesel continues

and with its outer edge between the housing flange held constant pressure in the application

see the actuator housing clamped. In the rest of the space 20 of the actuator 18, 18 ″, so that the to

gen is the operating membrane with an operating side of the operating membrane with these

fuingsstangc 23 connected, which in turn with the 30 fluid pressure against the Schiießrichtunf

the valve closure member 12 connected to the valve closure member 12 is acted upon. Tue <

rod 24 is connected. The actuating rod on the other side of the actuating membrane, which the Be

genübcrliegcnd engages on the actuating membrane is assigned to impact space 21, learns about

a slightly pre-tensioned pressure spring line 35 a fluid pressurization

of 26, which via the actuating rod 23 and 35 supply from the flow line 15, so with the

the Vcntilstange 24 on the valve closure piece 12 by the control valve regulated working pressure dei

a power from the heating system acting in its closing direction, practices. In the steady state there is at the Actuator

The impingement space 20 of the actuator is supply membrane 19 equilibrium. The flow with

Via a line 28 with a means of the above 40 pressure loading of the loading

The diaphragm side associated with the auxiliary regulator called the pre-regulated fluid space 20 is generated with it

pressure can be added. This fluid pressure is one in the opening direction of the valve closing pieces

is by means of a line 29 from the main flow line 12 directed force, which is in equilibrium mi

14 derived. The line 29 connects the opposing forces that are located

Main flow line 14 with a return line 30 45 from the slightly biased compression spring 26 and dei

for the discharge of the hot fluid pressure application, not shown, in the Beaujschla-

originating from the medium flowing off in the direction of the supply space 21.

Arrow 31. As is known, there are follow-up systems in line 29 between control systems.

whose connection point to the main flow line 14 which naturally cannot work without inertia

and the connection point of the to act 50 If in the main flow line 14 a pressure surge

The line 28 leading to space 20 of the actuator occurs, this is over the valve seat 11 de

an adjustable pressure reducing valve 32. Between control valve 10 in the flow line 15 of the Hei

this connection point of the line 28 to the line management system continued. This in the flow line 15 on

29 and the confluence of the line 29 in the receding pressure increase causes an increased flow

Running line 30 is a throttle member 33 with 55 medium pressure application of the actuation

precisely defined throttle opening. Otherwise, the intermediate membrane 19 is Di from the impingement space 21

see the pressure reducing valve 32 and the main front of the fluid pressure application in the Beauf

Running line 14 in line 29 a dirt trap impact space 20 essentially unchanged

34 built in. The actuation space 21 of the actuating remains, the actuation membrane experiences as a result of the Drive 18 is connected via a line 35 to the pre-6o pressure increase in the pressurization chamber 21

Running line 15 of the hot water heating system in displacement, which via the actuating rod 23

Connection. and the valve rod 24 on the valve plug *

In the main flow line 14 the system 12 is transmitted and this in the direction of his

Fluid supplied at high pressure level, closed position shifts. The necessary consequence is a pressure reduction of the main flow by means of the above-described S ₅

voltage when passing through the valve seat 11 of the line 14 into the flow line 1 * flowing meter

Control valve 10 to a low working pressure in the medium when passing through the valve seat 11.

the flow line 15 is to be throttled. Since this drops the fluid pressure in the

7 \ 0 8

uuiigsraum 21 of the actuator ah. so that now the behavior of a pressure reducing valve deviating from the aiii the Beläligungsmeinbran due to the constant behavior of a Druckhaltcntils is in the Dnickhcaufsclilagung in the pressure chamber 20 according to the invention in effecting restoring forces move the valve closure piece equal to the known response, whereby an extremely fast response Pressure fluctuations in the strong throttling of the flowing medium in the flow line 15 are ensured, since there is practically no passage through the control valve 10 and an obstructed discharge of the flow medium located in the pressure chamber 20 'occurs in the flow line 15 of the actuator 18'. This process repeats: ; I constantly, so that this can take place via the lines 28 ', 29' and the pressure control valve Drueknivcau in the flow line 15 within 32 'in the return line 30' cluingen at one end with the known system a blockage of the vuinsehieii setpoint pressure is regulated. Throttle point 33 not only simply leads to the functioning of the entire control system when the actuating diaphragm is moved, but rather the closed position of the valve closure piece poses a risk to the supply lines which are displaced via the flow line 15 12 from the pressure reserve 20 Heating system, since the valve valve can in this case flow out irrevocably in one line 33 into the return line 30 via the lines 28, 29 and the throttle plug 12. remains certain opening position or in its The in F i g. 2 of the drawing goes to the open position, in the case of the crfin- "ulnunu the above-described control arrangement according to the invention in the case of the Vcri> i amine control system only comes with respect to the throttle from 20 clogging 33 'the valve closure. ■ υ Diuckmiiiderventil 32 and the restrictor 33 piece 12 'home occurrence of pressure surges in the; ■ ■■': ■ · line 29 auxiliary regulator located Insofar supply line 15 'necessary in the closed position, as' ■■ <■ i "·.! the system according to FIG. 2 for the same parts as from the application space 20 'then none that ^; I:. ■■ - ■ System according to FIG. I, the same reference numerals valve closure piece 12 'have been moved into an opening position, but with a dash leading to the actuation of the actuator. On a detailed description of the branch more takes place. By the compression spring 26 '. who like ι. Eating parts can therefore be dispensed with in the known system in the closing direction of the. Closing piece acts, thereby the closing process

At.! He in Fig. 2 supported control arrangement.

. "• υπ! 'Auxiliary regulator for inlet pressure regulation for the 30 In the control arrangement shown in FIG. 3

V! ::: ieb in the line 29 'a throttle 33' is an auxiliary controlled overflow

■ '■■■' - pressure holding valve 32 'arranged, but regulator, which between a flow line and

-> ·:!., ·. the arrangement of the throttle point 33 and a return line of a heating system.

'' ■ ·. t "nid'.T \ entils in the line 29 at the plant is net and depending on the pressure occurring

Fig. 1 interchanged. The throttle point 33 'is a direct backstop 35 in the flow line.

• ■; e! I thus between the branch point of the for the mung of the supplied heat transfer medium h the

■ ν. Cooling space 20 'of the actuator admitting return line permitted. In addition, the rule is

^; ·. ü Line 28 'and the connection of the line arrangement in the same way as in the execution

'., ι the main flow line 14'. and the printing form according to FIG. 2, so that again

: i-Acniil 32 'has the same reference numerals used between the connection point of FIG. 41 for the same parts

'-ii> ιμ 28' to the line 29 'and its connection have been, but marked by two dashes

<^1; Return line 30 'arranged. net.

Vi ie in the known case is in the one from- In the control arrangement according to FIG. 3 is between

iiiiiH of line 29 '. from which the line 28 'from the main flow line 14 "and the flow line

· ■■■ '· ei μι. the fluid pressure thereby constant 45 15 ", which in turn leads to a heating system

<! '1! Ui. that a steady flow of fluid through pressure reducer 40, which is of no further interest here

■ '' ■ -. Throttle point 33 'and the pressure holding valve 32' are arranged in. Behind the pressure reducer branches from

• i = T line 29 'from the main flow line 14' to the flow line 15 "one to the return line 30"

Return line '30' takes place. In addition to the exchanged leading line 42, into which the control valve

Arrangement of the throttle point and the one in the line 5 ° 10 "is switched on. The control valve 10" works in

29 'arranged valve is essential to the invention, in this case as an overflow regulator, which in a

that instead of the pressure reducing valve when the pressure increase in the flow line 15 "is in the opening

Known system in the case of the invention reaches a pressure position. The admission areas c

holding valve is used. 20 ". 21" are opposite to the explanations according to As is known, when flowing through a 55 F i g. 2 interchanged in such a way that the

Pressure reducing valve a lowering of a high movement of the operating diaphragm in the sense of a

Flow pressure acting on a lower downstream valve closure piece of the control valve

Pressure. In the event of a pressure increase on the downstream side, the opening force via a line 35 ″ with that in the

For example, if the pressure is present as a result of a closing movement of the flow line 15 ″, select the valve closure piece of the actual control valve 60 rend the closing force for the valve closure piece

Flow medium from the relevant application now by applying the actuation

space of the actuator must flow back, membrane with the 32 ", 33"

closes such a pressure reducing valve. Applied in counter-regulated fluid pressure

set to go with a pressure control valve, as it will be. The auxiliary regulator is in the same way as control arrangement according to the invention, 65 in the embodiment according to FIG. 2 in the from

finds, with "such a pressure increase in the opening of the main flow line 14" to the return line

nungslaee. 30 "extending line 29" arranged, and the

By the prescribed, basically from the loading space 20 "of the actuator 18"

Leading line 28 "is between the throttle point and the pressure control valve on line 29" connected.

In the arrangement shown in FIG. 3, the force of the compression spring 26 ″ acts in the opening direction on the closure piece, so that this force in the event of a diaphragm rupture causes the closure piece to move into the open position and a risk to a house system is avoided.

Finally, as a modification of FIG. 3 is also io.

In addition, a control valve must be switched on as a pressure control valve in the return line, its control takes place by means of an auxiliary regulator in such a way that the closure piece when the pressure in the house system drops comes into the closed position. In this arrangement there is also the compression spring acting on the closure piece switched so that the closure piece goes into the closing days when the diaphragm ruptures, i.e. an undesired one Emptying of the house system prevented

1 sheet of drawings

Claims (1)

ί 803 360 Patent claims: MnH- ^{8 mr Druckre} S ^eiun K flowing ZuH ^ ² "^ ¹ ^ for" ^r hot water heating * - 2 ' T ^ei " ^em control valve, the connection by means of an actuator with actuation i ^Un h ⁵ pr ^mbra r ⁿ , ^betÜti8ba c ^iSt ' ^their Druckbea "fung a ™ on the one hand to generate the h ™. ^UC . ^a "ß ^maturing adjustment forces ? ^z " ^re ß ^{eInd pressure} ""d on the other ZL . ^ eugation of ^a constant, but adjustable, but adjustable ^{flow s} mean pressure which counteracts the adjustment forces Ξ ^Γ ^ ^{Om HtIf d} S