DE800445C - Device for checking closed safety valves for tightness during operation - Google Patents

Device for checking closed safety valves for tightness during operation

Info

Publication number
DE800445C
DE800445C DEP23276D DEP0023276D DE800445C DE 800445 C DE800445 C DE 800445C DE P23276 D DEP23276 D DE P23276D DE P0023276 D DEP0023276 D DE P0023276D DE 800445 C DE800445 C DE 800445C
Authority
DE
Germany
Prior art keywords
safety valves
during operation
closed safety
tightness during
checking
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.)
Expired
Application number
DEP23276D
Other languages
German (de)
Inventor
Helmut Haehndel
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.)
Maschinenfabrik Esslingen AG
Original Assignee
Maschinenfabrik Esslingen AG
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 Maschinenfabrik Esslingen AG filed Critical Maschinenfabrik Esslingen AG
Priority to DEP23276D priority Critical patent/DE800445C/en
Application granted granted Critical
Publication of DE800445C publication Critical patent/DE800445C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Safety Valves (AREA)
  • Check Valves (AREA)
  • Details Of Valves (AREA)

Description

Sicherheitsventile für brennbare, explosive oder giftige Gase dürfen nicht in die Maschinenräume ausblasen. Sie müssen an eine Leitung angeschlossen werden, die entweder in einen drucklosen Gasraum mündet oder an einer ungefährlichen Stelle ins Freie. Insbesondere bei hohen Drücken kommt es oft vor, daß die Ventile undicht sind, ohne daß dies leicht zu erkennen ist. Strömungsgeräusche täuschen sehr oft, weil bei den übrigen Geräuschen im Raum ihre Herkunft ungewiß ist. Eine auffällige Temperaturveränderung tritt nicht bei allen Gasen ein und auch nur dann, wenn die Undichtigkeit schon verhältnismäßig groß geworden ist. Eine Kontrolle könnte durch Einschaltung eines Dreiwegehahns in die Abströmleitung erzielt werden, wenn dieser so eingestellt wird, daß normalerweise das Gas vom Sicherheitsventil zum drucklosen Raum strömen kann. Zur Kontrolle müßte der Hahn dann so gedreht werden, daß die Leitung zum drucklosen Raum abgesperrt und unmittelbar am Hahn freigegeben wird. Dann besteht aber die Gefahr, daß die Rückstellung des Hahns in die Normalstellung vergessen wird. Safety valves for flammable, explosive or poisonous gases are allowed do not blow into the engine room. They have to be connected to a line that either leads to a pressureless gas space or to a harmless one Place outdoors. In particular at high pressures it often happens that the valves are leaking without this being easily recognized. Flow noises are deceiving very often because the origin of the other noises in the room is uncertain. One noticeable temperature change does not occur with all gases and only then, if the leak has already become relatively large. A check could can be achieved by switching on a three-way valve in the discharge line, if this is set so that normally the gas from the safety valve to the pressureless space can flow. For checking purposes, the tap would then have to be turned so that that the line to the pressureless room is shut off and released immediately at the tap will. But then there is the risk that the return of the cock into the normal position is forgotten.

Sach der vorliegenden Erfindung wird vor der Abströmöffnung des Sicherheitsventils ein Ventil a eingeschaltet, das durch den Druck einer Feder b normalerweise offen gehalten wird. Dieses Ventil erhält einen Schaft c, der nach außen durchgeführt ist. Überwindet man durch Drücken auf diesen Schaft den Federdruck ; und schließt damit die normale Austrittsöffnung d, so wird durch eine Nut e im Schaft oder in der Schaftführung der NVeg für das Gas in den Maschinenraum für die Dauer des Drückens freigegeben. Auf diese Weise kann man sich leicht davon überzeugen, ob das Sicherheitsventil dicht ist, ohne Gefahr zu laufen, daß die Umstellung auf normalen Durchgang vergessen wird. The subject of the present invention is in front of the discharge opening of the safety valve a valve a switched on, which is normally open by the pressure of a spring b is held. This valve receives a stem c that is carried outwards is. If you overcome the spring pressure by pressing on this shaft; and closes so that the normal outlet opening d, is through a groove e in the shaft or in the shaft guide of the NVeg for the gas in the engine room for the duration of the push Approved. In this way one can easily convince oneself whether the safety valve is tight without running the risk of forgetting to switch to normal passage will.

Claims (1)

PATENTANSPRUCH: Einrichtung zum Prüfen geschlossener Sicherheitsventile auf Dichthalten im Betrieb, dadurch gekennzeichnet, daß hinter dem Sicherheitsventil ein Abschlußorgan eingeschaltet wird, das normalerweise durch Federdruck offen gehalten und zur Prüfung geschlossen wird, wobei eine kleine Austrittsöffnung ins Freie freigegeben wird. PATENT CLAIM: Device for testing closed safety valves to keep tight in operation, characterized in that behind the safety valve a closure member is switched on, which is normally kept open by spring pressure and is closed for testing, releasing a small exit opening into the open air will.
DEP23276D 1948-12-02 1948-12-02 Device for checking closed safety valves for tightness during operation Expired DE800445C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP23276D DE800445C (en) 1948-12-02 1948-12-02 Device for checking closed safety valves for tightness during operation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP23276D DE800445C (en) 1948-12-02 1948-12-02 Device for checking closed safety valves for tightness during operation

Publications (1)

Publication Number Publication Date
DE800445C true DE800445C (en) 1950-11-06

Family

ID=7369132

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP23276D Expired DE800445C (en) 1948-12-02 1948-12-02 Device for checking closed safety valves for tightness during operation

Country Status (1)

Country Link
DE (1) DE800445C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028661A1 (en) * 1979-11-13 1981-05-20 Furmanite International Limited Apparatus for periodically testing the operation of safety valves, and safety valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028661A1 (en) * 1979-11-13 1981-05-20 Furmanite International Limited Apparatus for periodically testing the operation of safety valves, and safety valve

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