DE1650324C3

DE1650324C3 - Pilot operated, full-lift safety valve that opens in the direction of flow

Info

Publication number: DE1650324C3
Application number: DE19671650324
Authority: DE
Inventors: Herbert Dipl-Ing Meier
Original assignee: Bopp and Reuther GmbH
Current assignee: Bopp and Reuther GmbH
Priority date: 1967-12-20
Filing date: 1967-12-20
Publication date: 1974-03-21
Also published as: DE1650324B2; DE1650324A1

Description

Unten am Abspcrrkegel 12 des Steuerventils befindet sich ein ausgebildeter Drossclans.ilz, bevorzugt in Form eines nadelariigen Stiftes 23. Dieser arbeitet mit tier Verengung 7 beim öffnen des Absperrkörpers 3 den Hauptventils zusammen.Located at the bottom of the spar cone 12 of the control valve a trained Drossclans.ilz, preferably in Shape of a needle-like pen 23. This works with tier constriction 7 when opening the shut-off body 3 the main valve together.

Der Kolben 3 wird vom Druck des Mediums an seiner Unterseite im öffnenden Sinne und über die Bohrung 6 an der entgegengesetzten, jedpch größeren Oberseite in schließendem Sinne beaufschlagt. Die Kriifte in Schließrichtiing überwiegen. Gleichzeitig sieht der Druck unter dem Kegel 12 des Steuerventils 12 an.The piston 3 is acted upon by the pressure of the medium on its underside in the opening direction and via the bore 6 on the opposite, however larger, upper side in the closing direction. The forces in the closing direction predominate. At the same time, the pressure appears below the cone 12 of the control valve 12.

Sobald der Ventilkegel 12 sich bei Druckerhöhung hebt, strömt das Medium über dk Bohrung 6 nach. Durch die Verengung bzw. Düse? am oberen Ende des Kanals 6 findet eine Druckreduzierung statt, die an der Oberseile des Kolbens 3 spürbar wird. Jetzt übe/wiegt der Druck auf die Kolbcnunler&eite und der Kolben 3 öffnet, so daß das Hauplventil abblifet. Das Steuerventil bleibt infolge der großdimensionierlen Hubhilfe 14 des Ventilkegels 52 auch bei verringertem Druck geöffnet. Mit dem Heben di;s Kolbens 3 erfolgt durch den Drosselslift 23 eine zusätzliche Verengung an der Düse 7 und somit ein weiterer Druckabbau unter dem Ventilkegel 7. Diese Druckverringerung kann mit Hilfe des Stiften 23 durch das in der Höhe einstellbare Steuerventil variiert werden. Dadurch ist es möglich, den Schließdruck des Steuerventils zu wühlen. Mit dem Schließen des Steuerventils wird die Oberseite des Kolbens 3 vom Hauptventil wieder voll beaufschlagt und der letztere schließt.As soon as the valve cone 12 is lifted when the pressure increases, the medium flows via dk bore. 6 Through the constriction or nozzle? A pressure reduction takes place at the upper end of the channel 6, which can be felt on the upper part of the piston 3. The pressure on the piston valve side is now over / weighed and the piston 3 opens, so that the main valve flaps off. The control valve remains open due to the large-dimensioned lifting aid 14 of the valve cone 52 even at reduced pressure. When the piston 3 is raised, the throttle lift 23 causes an additional constriction at the nozzle 7 and thus a further pressure reduction under the valve cone 7. This pressure reduction can be varied with the aid of the pin 23 through the height-adjustable control valve. This makes it possible to dig into the closing pressure of the control valve. When the control valve closes, the upper side of the piston 3 is again fully pressurized by the main valve and the latter closes.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

1 21 2

Security from the head office through various

Patent claim: ^ _{nd (fs} stem ^ valve housing changeable ibt and duU

Auxiliary goods, opening in the direction of flow, the closing piece of the control valve on the

of the full-lift safety valve, the main closure of which is facing ropes with a

the final piece from the pressure of the syringe to be secured.

stems about a throttle hole provided in it. the mil of the throttle bore of the main

tion is applied in the closing direction and cooperates with sehlußsüickcs,

the coaxial to the main closure piece via the

scm the control valve is arranged, thereby Drossclunsuizcs on the closure gap of the Meuervcnliils

marked that the distance of the> o becomes a simple and structurally clear valve

Control valve seat (II) from the main valve seat (8) combination created, which at high ₍ demands)

by moving the valve housing, only a few easy-to-manufacture parts can be made accurate

can be changed and that the closure (12) exists and can therefore be manufactured cheaply. the

Control valve on the Hauptivcrsehluß- adjustability of the throttle approach compared to the

piece (3) facing side with a per se i ₅ throttle bore of the Hauptverschlußsliickes

knew needle-shaped Drosselansalz (23) verse here solely through the adjustable design of the

Jicn is reached with the throttle bore (7) of the control valve housing, which is required anyway.

Main locking piece cooperates. All built-in part of both the Hauntvcntils and

of the control valve with the throttle device

_{ao one} behind the other in one axis and can thereby

easy to assemble and disassemble. Come too

The invention relates to an auxiliary controlled, the otherwise required connecting channels between full-lift safety valve opening in the direction of flow and the individual valve parts, entirely omitted.
valve, the main closing piece of which is acted upon by the pressure of the main closing piece, depending on the setting, and is coaxial to the main closing piece or less far into the throttle bore, depending on the setting penetrate, above this the control valve is arranged. whereby the pressure from the control valve more or such known safety valves are reduced by less. This pressure level, the auxiliary control and the use of its own, adjusts the level of the closing pressure, so that the closing pressure of the medium for loading the main closure piece can be finely adjusted and in the direction of firing during operation until the desired low difference compared to the reaching of the medium is reached Blow-off pressure absolutely tight. Speech pressure can also be maintained,
with them the otherwise officially approved pressure In the drawing, an embodiment of the increase of about 10% between the response 35 invention is shown in vertical section. Dades safety valve and the reaching of the full after is in a with a lid I hub position considerably reduced. However, a disadvantage of the closed valve housing 2, a safety valve known as a piston, is that the closing body 3 for the main valve. The pressure piston 3 moves in a cylinder lowering inside a cylinder until the closing pressure is reached in the projection 4 of the lid I, which is, as a rule, too large and especially scattered by, for example, an O- Ring5 is subject to its leadership. sealed. In the middle of the piston there is already an auxiliary controlled safety; »- a valve known in its upper end as a throttle 7a« s valve, in which an externally adjustable, formed bore tf ». With the underside of the axially displaceable control pin lies more or less 45 shut-off body in the closed position on a valve seat 8 screwed in far into a throttle bore of the main locking piece housing 2.
kes intervenes. The control valve is at right angles in the ceiling! 1 is a height adjustable body 9 screwed to the main valve in a lateral projection of the means of thread 10, which houses a seat 11 valve housing and is supported by a for the auxiliary valve. The latter consists of a connection channel with the pressure chamber above the 50 a valve cone 12 with, for example, a main connection piece in connection. It is true that O-ring 13 can be used as a sealant in a groove. Instead of this valve, due to the adjustability of the O-ring 13 made of elastic material, the control pin of the passage cross section of the throttle can also change a metallic or other suitable material self-drilling of the main closure piece. A piston-like body 4, in which the pressure drop is screwed in until the valve cone 12 is reached and kept small by a closing pressure and above all secured by a lock nut, serves to support the closing point. However, the hub is. This piston 14 runs in a cylindrical safety valve in the structure of an extraordinarily threefold recess 15 of the body 9 with play, complicated and space-consuming, u..J for the actuation limited. Many separate components are required within a bore valve. 18 in the sleeve 17 is an object of the present invention, which can be fixed, to simplify the pressure adjustable spring 19 of the auxiliary device. The spring 19 loads the auxiliary valve considerably. body 12 and the piston! 4. Another solution to this problem is provided according to the invention Stcucrvcntil-Steucrvemii seen in the fact that the distance of the ausiaB is provided.