EP0191065A1 - Dispositif portatif de test de jauges de pression - Google Patents

Dispositif portatif de test de jauges de pression

Info

Publication number
EP0191065A1
EP0191065A1 EP19850904063 EP85904063A EP0191065A1 EP 0191065 A1 EP0191065 A1 EP 0191065A1 EP 19850904063 EP19850904063 EP 19850904063 EP 85904063 A EP85904063 A EP 85904063A EP 0191065 A1 EP0191065 A1 EP 0191065A1
Authority
EP
European Patent Office
Prior art keywords
pressure
vessel
hatch
calibrating apparatus
pressure testing
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.)
Withdrawn
Application number
EP19850904063
Other languages
German (de)
English (en)
Inventor
Gregory Joseph Breckell
Robert Lyne Sands
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0191065A1 publication Critical patent/EP0191065A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
    • G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
    • G01L27/005—Apparatus for calibrating pressure sensors

Definitions

  • the present invention relates to pressure gauge testing apparatus.
  • Such apparatus are primarily used in testing laboratories to calibrate or re-calibrate pressure measuring instruments, but can also be used to ascertain the ability of other instruments to withstand high pressures.
  • An object of the present invention is to enable calibrations and tests to be done, remote from the usual testing laboratories, by providing an accurate portable pressure testing apparatus.
  • the present invention consists in a pressure testing and calibrating apparatus comprising: a fluid filled pressure vessel including an observation port and a sealable hatch; a pump means attached to or integral with said pressure vessel and connected for fluid flow communication therewith, to raise the pressure within said vessel above ambient; a means to release the raised pressure within said vessel prior to unsealing said hatch; and a means to accurately ascertain the pressure within said vessel.
  • said hatch includes said observation port.
  • a water filled pressure vessel comprises an upstanding cylindrical pot 2, closed at one end and a circular toughened glass hatch 3 adapted to sealingly engage an open end of the pot 2.
  • An annular locking collar 4 includes a plurality of circumferentially spaced, inwardly radially projecting screw-down flanges 5, mutually interengageable with respective outwardly radially projecting screw-down flanges 6, disposed adjacent the open end of the pot 2.
  • the collar 4 is thus adapted to clampingly engage the hatch 3 with the open end of the pot 2 upon rotation relative to the pot 2, so as to seal thereagainst by way of a sealing gasket or ring 7.
  • any suitable sealing means may be used.
  • the glass hatch 3 has a convex surface 8 adapted to displace most of the air from the pot 2 upon engagement therewith when the pot is substantially full of water. The purpose being to expel air from within the pressure vessel which would otherwise impede its efficient pressurisation.
  • the convex glass hatch provides a magnified image of the contents of the vessel.
  • a pump piston 11 Repeatedly depressing a pump piston 11 causes water to flow unidirectionally by way of a non-return valve into the vessel 1 from a pump reservoir, thus compressing any residual air and raising the pressure within the vessel 1.
  • the pump may comprise a screw-down piston and cylinder in the manner of a syringe, in which case, rotation in one direction may cause pressurization whilst rotation in the opposite direction will cause depressurization.
  • Opening a valve 12 allows the pressurised water within the pressure vessel to flow back into the reservoir under the action of the compressed air.
  • a pressure gauge in the form of an arcuate air filled capillary tube 13 is disposed within the glass hatch and when in use provides a measure of the pressure in the pot 2.
  • any suitable type of pressure gauge which can be read through the hatch or from a remote indicator may be used.
  • the pot 2 In operation the pot 2 is filled with water and an instrument to be calibrated is placed in the pot.
  • the hatch 3 is fitted to the pot 2 and secured by rotation of the locking collar 4 relative to the pot.
  • the valve 12 is closed by clockwise rotation and the pump is operated until a desired pressure within the pot is reached, as indicated by the capillary tube 13. This value is then compared with that indicated by the instrument as seen through the hatch.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

Dispositif de test et d'étalonnage sous pression comprenant: un récipient sous pression (2) rempli d'un fluide, comprenant un orifice d'observation et un panneau en verre formant une étanchéité (3); un organe de pompe (9) fixé au récipient sous pression (2) ou solidaire de celui-ci et relié à ce dernier de manière à établir une communication d'écoulement de fluide, afin d'augmenter la pression dans le récipient (2) au delà de la pression ambiante; un organe (12) permettant de décharger la pression à l'intérieur du récipient (2) avant l'ouverture du panneau de verre (3); un organe servant à mesurer avec précision la pression dans le récipient (2). L'instrument à étalonner est placé dans ledit récipient (2).
EP19850904063 1984-08-09 1985-08-09 Dispositif portatif de test de jauges de pression Withdrawn EP0191065A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU647984 1984-08-09
AU6479/84 1984-08-09

Publications (1)

Publication Number Publication Date
EP0191065A1 true EP0191065A1 (fr) 1986-08-20

Family

ID=3697020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850904063 Withdrawn EP0191065A1 (fr) 1984-08-09 1985-08-09 Dispositif portatif de test de jauges de pression

Country Status (3)

Country Link
EP (1) EP0191065A1 (fr)
JP (1) JPS61502981A (fr)
WO (1) WO1986001292A1 (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1404821A (en) * 1972-03-08 1975-09-03 Nu Swift Int Ltd Testing or calibration of pressure indicators fitted to pressure vessels
US4430884A (en) * 1981-12-14 1984-02-14 Landrigan Corporation Method for testing hydraulic releases

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8601292A1 *

Also Published As

Publication number Publication date
JPS61502981A (ja) 1986-12-18
WO1986001292A1 (fr) 1986-02-27

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Legal Events

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Effective date: 19860710