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DE2507313A1 - Non-return valve closed by excessive reverse flow velocity - has piston held open by forward flow and sprung ball in groove - Google Patents

Non-return valve closed by excessive reverse flow velocity - has piston held open by forward flow and sprung ball in groove

Info

Publication number
DE2507313A1
DE2507313A1 DE19752507313 DE2507313A DE2507313A1 DE 2507313 A1 DE2507313 A1 DE 2507313A1 DE 19752507313 DE19752507313 DE 19752507313 DE 2507313 A DE2507313 A DE 2507313A DE 2507313 A1 DE2507313 A1 DE 2507313A1
Authority
DE
Germany
Prior art keywords
groove
return valve
valve body
valve closed
open position
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DE19752507313
Other languages
German (de)
Inventor
Klaus Dipl Ing Wedler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liebherr Mischtecknik GmbH
Original Assignee
Liebherr Mischtecknik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Liebherr Mischtecknik GmbH filed Critical Liebherr Mischtecknik GmbH
Priority to DE19752507313 priority Critical patent/DE2507313A1/en
Publication of DE2507313A1 publication Critical patent/DE2507313A1/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20—Excess-flow valves
    • F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
    • F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/028—Safety devices separate from control system in case of power failure, for hydraulical lifts, e.g. braking the hydraulic jack

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Safety Valves (AREA)

Abstract

The non-return valve has aligned inlet and outlet ducts at the ends of a chamber contg. a closure member (7) supported for movement between an open position medially within the chamber and a closed position engaging a seat (10) at the inlet duct. Forward flow passes all round the member, pushing it into the open position against an abutment (11). A spring-loaded ball (3) engaging a groove in the member holds it with limited force in the open position. If reverse flow exceeds a safe velocity, e.g. as by rupture of a pipe, the detent gives way and the valve closes thereby preventing sudden lowering of a load.

Description

17.2.1975February 17, 1975

LIEBHERR-MISCHTECHNIK-GMBH 7953 Bad Schussenried Im ElchgrundLIEBHERR-MISCHTECHNIK-GMBH 7953 Bad Schussenried Im Elchgrund

RohrbruchsicherungPipe rupture protection

Die Erfindung betrifft eine Sicherung für Rohrleitungssysteme, die bei überschreiten der gewünschten Strömungsgeschwindigkeit des Mediums anspricht und die Rohrleitung verschließt.The invention relates to a fuse for pipeline systems that are used in exceed the desired flow rate of the medium responds and the pipeline closes.

Rohrbruchsicherungen haben den Zweck, bei z.B. hydraulischen Lastenaufzügen das plötzliche Abstürzen der Lasten oder Skips infolge von Leitungsbrüchen zu verhindern, bzw. allgemein bei überschreiten der gewünschten Strömungsgeschwindigkeit des Mediums die Rohrleitung zu verschließen und dadurch die Senkbewegung zu stoppen. Es sind Rohrbruchsicherungen bekannt, die den federbelasteten Rückschlagventilen ähneln, allerdings ist die Schließbewegung des Ventilkörpers bei den Rohrbruchsicherungen nicht durch die Federkraft unterstützt5 sondern erfolgt gegen dieselbe. Die Feder ist also auf der gegenüberliegenden Seite des Ventilkörpers angeordnet und wirkt durch die Ventilsitzöffnung hindurch. Sie ist gegen ein schraubbares Teil abgestützt, sodaß die Federkraft stufenlos eingestellt werden kann.Pipe rupture safety, have at, for example hydraulic hoists the purpose of preventing the abrupt crash of the loads or skips a result of line break, or generally at the desired flow rate exceed the medium to close the duct and thereby to stop the lowering movement. There are known pipe rupture protection that are similar to the spring-loaded check valves, but the closing movement of the valve body with the pipe rupture protection is not supported by the spring force 5 but instead takes place against the same. The spring is therefore arranged on the opposite side of the valve body and acts through the valve seat opening. It is supported against a screwable part so that the spring force can be continuously adjusted.

6098 3 6/04356098 3 6/0435

Diese Rohrbruchsicherung hat den Nachteil, daß während der Schließbewegung des Ventil körpers die Federkraft entsprechend der Federkennlinie zunimmt und dadurch Schwingungen entstehen können. Außerdem ist es ein großer Nachteil, daß die Sicherung nur in ausgebautem Zustand eingestellt werden kann.This pipe rupture protection has the disadvantage that during the closing movement of the valve body the spring force according to the spring characteristic increases and vibrations can arise as a result. It is also a major disadvantage that the fuse is only set when it is removed can be.

Der Erfindung liegt die Aufgabe zugrundes eine einfache Rohrbruchsicherung zu finden, die diese Nachteile vermeidet.The invention is based on the object's to find a simple pipe rupture that avoids these drawbacks.

Biese Aufgabe wird erfindungsgemäß dadurch gelöst, daß ein Ventil körper, der in beiden Durchflußrichtungen vom Mediumstrom beaufschlagt wird, in seiner Ausgangslage durch mindestens ein Element gehalten wird, das bei überschreiten der gewünschten Strömungsgeschwindigkeit des Mediums bzw. bei Erreichen eines bestimmten Staudruckes den Ventil körper freigibt, sodaß die Rohrleitung rasch verschlossen wird. Das Element erlaubt eine stufenlose Einstellung der Losbrechkraft von außen.This object is achieved according to the invention in that a valve body, which is acted upon by the medium flow in both flow directions, in its starting position is held by at least one element that, when the desired flow velocity of the medium or releases the valve body when a certain dynamic pressure is reached, so that the pipeline is quickly closed. The element allows a stepless adjustment of the breakaway force from the outside.

Ein Ausführungsbeispiel ist in der beiliegenden Zeichnung dargestellt.An exemplary embodiment is shown in the accompanying drawing.

Fig.1 zeigt einen schematischen Längsschnitt durch die Rohrbruchsicherung.1 shows a schematic longitudinal section through the pipe rupture protection device.

Die Rohrbruchsicherung besteht aus einem Gehäuseteil (1), in dem mindestens ein Element (2) gehalten wird, das bei dem in Fig.1 gezeigten Beispiel aus einer Kugel (3), einer Feder (4) und einer Stellschraube (5) besteht, mit der die Vorspannung der Feder (4) von außen stufenlos eingestellt werden kann. Die Stellschraube enthält eine Dichtung (6), um Lecks nach außen zu vermeiden.The pipe rupture protection consists of a housing part (1) in which at least an element (2) is held, which in the example shown in Fig.1 consists of a ball (3), a spring (4) and an adjusting screw (5) with which the preload of the spring (4) is continuously adjusted from the outside can be. The set screw contains a seal (6) to prevent external leaks.

Das Element (2) hält den Ventilkörper (7) in seiner Ausgangsstellung, d. h. die Rohrbruchsicherung gibt den Durchgang frei.The element (2) holds the valve body (7) in its initial position, i. H. the pipe rupture protection releases the passage.

Der Ventilkörper (7) besteht zweckmäßigerweise aus einem Drehteil, das im Beispiel mit einer Kerbe (8) versehen ist, in die das Element (2) ein-The valve body (7) expediently consists of a rotating part which in the example is provided with a notch (8) into which the element (2) is

6098 3 6/04356098 3 6/0435

greift. Der Ventilkörper (7) wird längs einer zyl. Führung (9) geführt und kann sich aus seiner Ausgangsstellung bis zur Schulter (1o) bewegen. Bei der Hubbewegung des Lastenaufzuges strömt das Medium von links nach rechts durch die Rohrbruchsicherung. Der Ventilkörper (7) wird gegen die Anlagefläche (11) gepreßt; der Durchgang ist frei.engages. The valve body (7) is along a cyl. Guide (9) out and can move from its starting position up to the shoulder (1o). During the lifting movement of the goods elevator, the medium flows from the left right through the pipe burst protection. The valve body (7) is pressed against the contact surface (11); the passage is free.

Bei der Senkbewegung strömt das Medium umgekehrt durch die Rohrbruchsicherung. Das Element (2) ist so eingestellt, daß der Ventilkörper (7) in seiner Ausgangslage gehalten wird, solange die gewünschte Senkgeschwindigkeit des Aufzuges bzw. die Strömungsgeschwindigkeit des Mediums nicht überschritten wird.During the lowering movement, the medium flows in reverse through the pipe burst safety device. The element (2) is set so that the valve body (7) is held in its starting position as long as the desired lowering speed of the elevator or the flow speed of the medium is not exceeded.

Oberschreitet aus irgendeinem Grund die Strömungsgeschwindigkeit den zulässigen Wert, reißt sich der Ventilkörper (7) los und verschließt die Rohrleitung, indem er sich gegen die Schulter (1o) legt.If the flow rate exceeds the for any reason permissible value, the valve body (7) tears itself loose and closes the pipeline by resting against the shoulder (1o).

Die Wirkung dieser Rohrbruchsicherung beruht darauf, daß der Ventilkörper (7) in beiden Durchflußrichtungen direkt vom Mediumstrom beaufschlagt wird.The effect of this pipe rupture protection is based on the fact that the valve body (7) is acted upon directly by the medium flow in both flow directions.

6098 = G / 0 43 56098 = G / 0 43 5

Claims (1)

PatentanspruchClaim Sicherung für Rohrleitungssysteme, die bei überschreiten der gewünschten Strömungsgeschwindigkeit des Mediums anspricht und die Rohrleitung verschließt, dadurch gekennzeichnet, daß ein Ventilkörper (7), der in beiden Durchflußrichtungen vom Mediumstrom beaufschlagt wird, in seiner Ausgangslage durch mindestens ein Element gehalten wird, das bei überschreiten dsr gewünschten Strömungsgeschwindigkeit des Mediums den Ventilkörper (7) freigibt, wodurch dieser die Rohrleitung rasch verschließt, und daß das Element (2) eine stufenlose Einstellung der Losbrechkraft von außen erlaubt.Fuse for pipeline systems, which when exceeding the desired Responds to the flow velocity of the medium and closes the pipeline, characterized in that a valve body (7), which in is acted upon by the medium flow in both directions of flow, is held in its starting position by at least one element that is exceeded at The valve body is dsr the desired flow rate of the medium (7) releases, whereby it closes the pipeline quickly, and that the element (2) a stepless adjustment of the breakaway force allowed from outside. 609836/043S609836 / 043S
DE19752507313 1975-02-20 1975-02-20 Non-return valve closed by excessive reverse flow velocity - has piston held open by forward flow and sprung ball in groove Pending DE2507313A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19752507313 DE2507313A1 (en) 1975-02-20 1975-02-20 Non-return valve closed by excessive reverse flow velocity - has piston held open by forward flow and sprung ball in groove

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752507313 DE2507313A1 (en) 1975-02-20 1975-02-20 Non-return valve closed by excessive reverse flow velocity - has piston held open by forward flow and sprung ball in groove

Publications (1)

Publication Number Publication Date
DE2507313A1 true DE2507313A1 (en) 1976-09-02

Family

ID=5939388

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752507313 Pending DE2507313A1 (en) 1975-02-20 1975-02-20 Non-return valve closed by excessive reverse flow velocity - has piston held open by forward flow and sprung ball in groove

Country Status (1)

Country Link
DE (1) DE2507313A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0005197A1 (en) * 1978-04-19 1979-11-14 Gerd Höffgen Safety device in case of rupturing of a hose between a pressurized conduit and the supply pipe of an apparatus
US6116270A (en) * 1995-08-04 2000-09-12 Hydro-Flo Holdings Pty Ltd. Piston valve
CN104455594A (en) * 2014-12-08 2015-03-25 李国栋 Automatic pipeline leakage protection device
CN105422923A (en) * 2015-12-09 2016-03-23 西安航天动力研究所 Mechanical-locking self-locking check valve
CN105422928A (en) * 2015-12-09 2016-03-23 西安航天动力研究所 Self-locking check valve reliable in locking position
CN108443562A (en) * 2018-03-19 2018-08-24 上海空间推进研究所 The double limit sealing structures of superpressure preventing
DE102018104587A1 (en) * 2018-02-28 2019-08-29 Jungheinrich Aktiengesellschaft Line breakage protection for a hydraulic cylinder

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0005197A1 (en) * 1978-04-19 1979-11-14 Gerd Höffgen Safety device in case of rupturing of a hose between a pressurized conduit and the supply pipe of an apparatus
US6116270A (en) * 1995-08-04 2000-09-12 Hydro-Flo Holdings Pty Ltd. Piston valve
CN104455594A (en) * 2014-12-08 2015-03-25 李国栋 Automatic pipeline leakage protection device
CN105422923A (en) * 2015-12-09 2016-03-23 西安航天动力研究所 Mechanical-locking self-locking check valve
CN105422928A (en) * 2015-12-09 2016-03-23 西安航天动力研究所 Self-locking check valve reliable in locking position
CN105422923B (en) * 2015-12-09 2017-10-10 西安航天动力研究所 A kind of mechanical lock-bit self-locking one-way
CN105422928B (en) * 2015-12-09 2017-10-13 西安航天动力研究所 A kind of self-locking one-way of reliable lock-bit
DE102018104587A1 (en) * 2018-02-28 2019-08-29 Jungheinrich Aktiengesellschaft Line breakage protection for a hydraulic cylinder
US10900505B2 (en) 2018-02-28 2021-01-26 Jungheinrich Aktiengesellschaft Line rupture safeguard for a hydraulic cylinder
CN108443562A (en) * 2018-03-19 2018-08-24 上海空间推进研究所 The double limit sealing structures of superpressure preventing
CN108443562B (en) * 2018-03-19 2020-04-24 上海空间推进研究所 Overpressure-proof double-limit sealing structure

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