GB1485152A - Systems and apparatus for gas detection - Google Patents
Systems and apparatus for gas detectionInfo
- 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
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.
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)
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 |
-
1975
- 1975-04-29 GB GB565674A patent/GB1485152A/en not_active Expired
- 1975-05-12 FR FR7514748A patent/FR2311291A1/en active Granted
Cited By (7)
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 |
---|---|
FR2311291A1 (en) | 1976-12-10 |
FR2311291B1 (en) | 1980-12-05 |
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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 |