GB1485152A - Systems and apparatus for gas detection - Google Patents

Systems and apparatus for gas detection

Info

Publication number
GB1485152A
GB1485152A GB565674A GB565674A GB1485152A GB 1485152 A GB1485152 A GB 1485152A GB 565674 A GB565674 A GB 565674A GB 565674 A GB565674 A GB 565674A GB 1485152 A GB1485152 A GB 1485152A
Authority
GB
United Kingdom
Prior art keywords
gas
duct
probe
ingress
purging
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
GB565674A
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.)
British Gas Corp
Original Assignee
British Gas Corp
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 British Gas Corp filed Critical British Gas Corp
Priority to GB565674A priority Critical patent/GB1485152A/en
Priority to FR7514748A priority patent/FR2311291A1/en
Publication of GB1485152A publication Critical patent/GB1485152A/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
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • 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
    • G01M3/005—Investigating fluid-tightness of structures using pigs or moles
    • 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
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

1485152 Gas leak detector BRITISH GAS CORP 29 April 1975 [7 Feb 1974] 05656/74 Headings G1N and G1S A method of locating the position of ingress of a given gas into a buried duct such as a telephone cable duct 2 involves; purging the gas laden duct with a forced flow of clean air from a blower 3 to induce a gas-air interface at the point of gas ingress into the duct; introducing a gas detector probe 4 into the duct and drawing it along by means of the draw line 5 provided in the duct in the direction of purging air-flow so as to cause an audible and/or visible indication of the presence of the given gas at a remote indicating unit 8 connected by cable 7 to the probe; and determining the position of the probe in the duct and thus the point of gas ingress thereto. The probe position may be determined by measuring markers along the draw line or by an electromagnetic signal transmitted from the probe to a portable receiver 40 carried by an operator at the ground surface and providing an audible warning of the proximity of the probe. The gas sensor (11) Fig. 3 (not shown) may be a Toguchi type connected in a bridge arrangement to compensate for variations in supply potential and providing from loud-speaker (52) a signal of frequency dependent upon gas concentration.
GB565674A 1975-04-29 1975-04-29 Systems and apparatus for gas detection Expired GB1485152A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB565674A GB1485152A (en) 1975-04-29 1975-04-29 Systems and apparatus for gas detection
FR7514748A FR2311291A1 (en) 1975-04-29 1975-05-12 GAS DETECTION METHOD AND APPARATUS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB565674A GB1485152A (en) 1975-04-29 1975-04-29 Systems and apparatus for gas detection
FR7514748A FR2311291A1 (en) 1975-04-29 1975-05-12 GAS DETECTION METHOD AND APPARATUS

Publications (1)

Publication Number Publication Date
GB1485152A true GB1485152A (en) 1977-09-08

Family

ID=26218865

Family Applications (1)

Application Number Title Priority Date Filing Date
GB565674A Expired GB1485152A (en) 1975-04-29 1975-04-29 Systems and apparatus for gas detection

Country Status (2)

Country Link
FR (1) FR2311291A1 (en)
GB (1) GB1485152A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2138956A (en) * 1983-04-27 1984-10-31 Dunlop Ltd Improvements in or relating to leak detectors
FR2545215A1 (en) * 1983-04-27 1984-11-02 Dunlop Ltd LEAK DETECTOR WITH MEANS TO VERIFY OPERATING SUITABILITY
GB2188735A (en) * 1986-03-31 1987-10-07 Emhart Ind Hydrocarbon probe and method of installation
CN110823480A (en) * 2019-10-31 2020-02-21 湖南国奥电力设备有限公司 Underground cable fault early warning method and device based on gas detection
CN112377818A (en) * 2020-11-13 2021-02-19 江苏杰霸物联网科技有限公司 Gas leakage monitoring device based on intelligent gas and use method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2138956A (en) * 1983-04-27 1984-10-31 Dunlop Ltd Improvements in or relating to leak detectors
FR2545215A1 (en) * 1983-04-27 1984-11-02 Dunlop Ltd LEAK DETECTOR WITH MEANS TO VERIFY OPERATING SUITABILITY
US4576037A (en) * 1983-04-27 1986-03-18 Dunlop Limited Leak detectors
GB2188735A (en) * 1986-03-31 1987-10-07 Emhart Ind Hydrocarbon probe and method of installation
CN110823480A (en) * 2019-10-31 2020-02-21 湖南国奥电力设备有限公司 Underground cable fault early warning method and device based on gas detection
CN112377818A (en) * 2020-11-13 2021-02-19 江苏杰霸物联网科技有限公司 Gas leakage monitoring device based on intelligent gas and use method thereof
CN112377818B (en) * 2020-11-13 2023-01-17 江苏杰霸物联网科技有限公司 Gas leakage monitoring device based on intelligent gas and use method thereof

Also Published As

Publication number Publication date
FR2311291B1 (en) 1980-12-05
FR2311291A1 (en) 1976-12-10

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee