EP0148212A1 - Systeme de detection de gaz et procede de production d'un tel systeme - Google Patents

Systeme de detection de gaz et procede de production d'un tel systeme

Info

Publication number
EP0148212A1
EP0148212A1 EP19840902338 EP84902338A EP0148212A1 EP 0148212 A1 EP0148212 A1 EP 0148212A1 EP 19840902338 EP19840902338 EP 19840902338 EP 84902338 A EP84902338 A EP 84902338A EP 0148212 A1 EP0148212 A1 EP 0148212A1
Authority
EP
European Patent Office
Prior art keywords
type
gas
detecting system
enclosure
gas detecting
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Withdrawn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
EP19840902338
Other languages
German (de)
English (en)
Inventor
Hans H. Haraldsted
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 EP0148212A1 publication Critical patent/EP0148212A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment

Definitions

  • the object of the present invention is to indicate a method and give an example of an embodiment of an inexpensive and readily demountable gas detecting system which is made of a plastics material, e.g. nylon, which in accordance with international as well as national heavy-cur ⁇ rent regulations for "Electrical equipment for potentially explosive atmospheres" can be made as an "EEx"-type device, having a "d"-type flame proof enclosure, an "e”-type increased safety together with an "s"-type special protection.
  • a plastics material e.g. nylon
  • An "i"-type embodiment with an "EEx"-type gas detecting equipment may involve a multiplication of the expenditure on the electronic measuring apparatus.
  • an EX-type embodiment of the gas detector enclosure plus a "d"- and "e”-type sensor results in a low-cost electronic device.
  • the Ex-protected gas detecting equipment being of a very complex design and very expensive.
  • German patent specification No. 2625891 in which an "i"-type in ⁇ trinsic safety current circuit is disclosed, the possibility of having a forced gas supply, e.g. via a pump, during the operation of l e diffusion measuring head is also indicated. Hitherto, this has b t*n arduous and expensive in connection with other EEX-type embodiment*?. Further, the embodiment disclosed in said German specification is complex too.
  • the present invention represents a substantial improvement of previous ⁇ ly known embodiments, since the safety has moved up from an "EEx"-type protection within an "i"-type intrinsic safety circuit to a "d"-type flame proof enclosure involving an "e"-type increased,security; addi ⁇ tionally, flash-overs are eliminated through the choice of material, which at the same time is made More corrosion-resistant and much more favourable having regard to production costs. Further, in the chosen design the capability of the plastics material to be gas-proof is utilized. The design is furthermore so good that the unit during ope ⁇ ration may be readily connected to a forced gas supply unit.
  • Fig. 1 shows in a sectional view an example of a gas detecting system which complies with international as well as national heavy-current re ⁇ gulations for electrical equipment for potentially explosive atmos ⁇ pheres under the "EEx"-type of protection which is provided with a "d"-type flame proof enclosure, involving an "e”-type increased safety and an “s"-type special protection for gas detection within the "II C"- group of materials, in which 1 designates an "EEx"-type terminal box of a plastics material provided with an "e”-type increased safety for the mounting thereon of a gas detector housing of a plastics material and having a "d"-type flame proof enclosure comprising of a readily de ⁇ mountable top part 3 and a bottom part 2 in which the removable gas sensor 4 with its six electrode legs 7 is placed and plugged into a protrusion 5 which, in connection with the flat connection 6 and the gas-proof property of the plastics material together with said "EEx"- type tolerances, makes an "EEx"-
  • the bottom and top parts 2 and 3 of the "EEx"-type gas sensor housing are here kept together by means of two steel bolts 10 thus providing a "d"-type flame proof assembly.
  • a flame arresting member 8 which permits a through-flow of gas and which for instance may be made of vitrified stainless steel. It is shaped and dimensioned with tolerances accord- ing to Fig. 1 which renders the gas sensor housing 2, 3 a "d"-type flame proof enclosure and, if made of nylon »6.6, strong enough to en ⁇ dure a small gas explosion within the sensor compartment 4, and this applies to a temperature of the outer atmosphere or an ambient tempe ⁇ rature of approximately 100° Centigrade as well as e.g. a gas like acetylene or a gas chosen from the "EEx"-safety group II C.
  • the current and voltage supplied from the terminal box 1 to the gas sensor compartment 4 is provided as an "EEx"-type safety facility and a "d"-type flame proof facility by means of, in the present case, six specially designed single electrodes 9 which, due to their larger dia ⁇ meter thread towards the flame chamber 4 and smaller diameter thread towards the inside of the terminal box 1 and due to two holes in each end of each separate electrode, makes an assembly or joint which, when seen from the sensor compartment 4, is "d"-type flame proof and, when seen from the terminal box compartment 1, represents an "e”-type in ⁇ creased safety facility, through which current and voltage can be ;uj ⁇ - plied and delivered.
  • Embedding a standard socket for the sensor Irijy in the nylon material 2, 3 by means of e.g.
  • the gas sensor housing 3 may be readily mounted with, as an auxiliary device, a closed cover 11 in front of the entrance 8 to the sensor 4, and the cover 11 may then by means of two pipe stubs 13 be used to conduct a predetermined amount of gas or gasflow 14 across the sensor head 2, 3 and 4.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Abstract

Système de détection de gaz aisément démontable et de fabrication avantageuse, composé d'un matériau plastique, par exemple du nylon, pourvu par précaution d'une enceinte résistant au flammes (1), permettant d'obtenir une sécurité accrue et une protection spéciale contre l'acétylène et des températures ambiantes de 100oC, et ayant recours aux propriétés d'auto-étanchéification du matériau plastique. Le système comprend un passage de traversée d'électrodes comportant une sécurité accrue, qui maintient l'enceinte étanche aux flammes et qui permet le montage d'un équipement d'alimentation forcée en gaz pendant le fonctionnement.
EP19840902338 1983-06-10 1984-06-12 Systeme de detection de gaz et procede de production d'un tel systeme Withdrawn EP0148212A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK265183A DK265183A (da) 1983-06-10 1983-06-10 Gasfoelerarrangement
DK2651/83 1983-06-10

Publications (1)

Publication Number Publication Date
EP0148212A1 true EP0148212A1 (fr) 1985-07-17

Family

ID=8114216

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840902338 Withdrawn EP0148212A1 (fr) 1983-06-10 1984-06-12 Systeme de detection de gaz et procede de production d'un tel systeme

Country Status (3)

Country Link
EP (1) EP0148212A1 (fr)
DK (1) DK265183A (fr)
WO (1) WO1984004967A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3928697C1 (fr) * 1989-08-30 1990-11-08 Auergesellschaft Gmbh, 1000 Berlin, De
GB9115428D0 (en) * 1991-07-17 1991-09-04 Gibbons Cedric S Sensor unit
GB2328508B (en) * 1997-08-18 2002-02-13 Zellweger Analytics Ltd Housing for a flammable gas detector

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2625891B2 (de) * 1976-06-04 1978-04-06 Auergesellschaft Gmbh, 1000 Berlin Gasmeßgerät
DE2911548A1 (de) * 1979-03-23 1980-09-25 Bayer Ag Gasdetektor
GB2094005B (en) * 1981-02-03 1985-05-30 Coal Industry Patents Ltd Electrochemical gas sensor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8404967A1 *

Also Published As

Publication number Publication date
DK265183A (da) 1984-12-11
WO1984004967A1 (fr) 1984-12-20
DK265183D0 (da) 1983-06-10

Similar Documents

Publication Publication Date Title
US4958938A (en) Temperature transmitter with integral secondary seal
US4352099A (en) Gas sensing unit for use in environment comprising explosive gases
US7190053B2 (en) Field device incorporating circuit card assembly as environmental and EMI/RFI shield
US3767917A (en) Ionizing-type fire alarm sensor
US4515007A (en) Method of and apparatus for testing the integrity of filters
US20090060246A1 (en) Techniques for protection of acoustic devices
NL195046C (nl) Geleidingsinrichting voor het detecteren van de aanwezigheid van vloeistofdruppels.
US4238679A (en) Dual-chamber ionization smoke detector assembly
US6453723B1 (en) Gas sensor device
CN105008692A (zh) 废气传感器中用于对测量室产生高密封性的特定密封几何结构
JPH08510332A (ja) ガス導管内の測定センサユニット
US5661244A (en) Pressure sensor
WO2005031297A1 (fr) Procede et dispositif de detection et de localisation de fuites dans des systemes a vide
EP0148212A1 (fr) Systeme de detection de gaz et procede de production d'un tel systeme
US4786811A (en) Ionization type-smoke detector
US3936621A (en) Destructible type switch having frangible conductive element
US3968472A (en) Vibration detection and analysis system employing an intrinsic safety barrier
EP1005646B1 (fr) Logement pour detecteur de gaz inflammable
US6998618B2 (en) Integral condition monitor for detecting overheating in an electric generator
US3284789A (en) Cathodic protection system detector
GB1585631A (en) Gas-measuring apparatus
US5992249A (en) Tantalum lined probe
US20060238287A1 (en) Explosion proof door holder
JPS57182677A (en) Pipe joint for detecting concealed pipe
WO2014070501A1 (fr) Détection de fuites dans un dispositif de traversée

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB NL SE

17P Request for examination filed

Effective date: 19850208

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19861231