GB859490A - Improvements relating to apparatus for detecting leaks in gas flow ducts - Google Patents

Improvements relating to apparatus for detecting leaks in gas flow ducts

Info

Publication number
GB859490A
GB859490A GB3278658A GB3278658A GB859490A GB 859490 A GB859490 A GB 859490A GB 3278658 A GB3278658 A GB 3278658A GB 3278658 A GB3278658 A GB 3278658A GB 859490 A GB859490 A GB 859490A
Authority
GB
United Kingdom
Prior art keywords
duct
pressure
venturi
gas flow
ratio
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
GB3278658A
Inventor
George Robert Kenneth Jameson
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.)
THOMPSON NUCLEAR ENERGY CO Ltd
Original Assignee
THOMPSON NUCLEAR ENERGY CO Ltd
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 THOMPSON NUCLEAR ENERGY CO Ltd filed Critical THOMPSON NUCLEAR ENERGY CO Ltd
Priority to GB3278658A priority Critical patent/GB859490A/en
Publication of GB859490A publication Critical patent/GB859490A/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
    • G01M3/2807—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 pipes
    • G01M3/2815—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 pipes using pressure measurements

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

859,490. Detecting leaks. A.E.I.-J. THOMPSON NUCLEAR ENERGY CO. Ltd. Oct. 1, 1959 [Oct. 14, 1958], No. 32786/58. Class 99(2). An apparatus for detecting leaks in a gas flow duct 2 comprises a Venturi tube 4 mounted in the duct in alignment with the gas flow, a restriction 3 on the downstream side of the Venturi, and warning means responsive to the ratio of the pressure P2 in the Venturi throat 5 relative to the pressure P1 on the upstream side of the Venturi, which indicates a leak when this ratio varies from its initial value. As shown in Fig. 2, the warning means consists of a piston with ends 7, 8 and biased by a spring 9. When the pressure ratio becomes low due to a leak in the duct the piston moves so as to close electrical contacts 15 to thereby operate apparatus serving to cut off gas feed to the pressurised vessel 1 connected to the duct or in other cases closing a supply valve at the duct entrance. For preventing spurious trips of the apparatus when P1 is high, a bellows 19, connected to the outer contact increases the gap between the contacts at high pressures. The Venturi tube may form part of the duct. As shown in Fig. 4, a leak port in which needle 20, operated by bellows 21, is located provides a means for keeping the ratio of the pressure in cylinder 12 to the pressure P2 linear.
GB3278658A 1958-10-14 1958-10-14 Improvements relating to apparatus for detecting leaks in gas flow ducts Expired GB859490A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3278658A GB859490A (en) 1958-10-14 1958-10-14 Improvements relating to apparatus for detecting leaks in gas flow ducts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3278658A GB859490A (en) 1958-10-14 1958-10-14 Improvements relating to apparatus for detecting leaks in gas flow ducts

Publications (1)

Publication Number Publication Date
GB859490A true GB859490A (en) 1961-01-25

Family

ID=10343979

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3278658A Expired GB859490A (en) 1958-10-14 1958-10-14 Improvements relating to apparatus for detecting leaks in gas flow ducts

Country Status (1)

Country Link
GB (1) GB859490A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160208716A1 (en) * 2015-01-19 2016-07-21 Rolls-Royce Plc. Method for detecting a fault, fault detection system and gas turbine engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160208716A1 (en) * 2015-01-19 2016-07-21 Rolls-Royce Plc. Method for detecting a fault, fault detection system and gas turbine engine
US10487749B2 (en) * 2015-01-19 2019-11-26 Rolls-Royce Plc Method for detecting a fault, fault detection system and gas turbine engine

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