EP1397658A1 - Procede pour surveiller un flux gazeux - Google Patents

Procede pour surveiller un flux gazeux

Info

Publication number
EP1397658A1
EP1397658A1 EP02718065A EP02718065A EP1397658A1 EP 1397658 A1 EP1397658 A1 EP 1397658A1 EP 02718065 A EP02718065 A EP 02718065A EP 02718065 A EP02718065 A EP 02718065A EP 1397658 A1 EP1397658 A1 EP 1397658A1
Authority
EP
European Patent Office
Prior art keywords
gas
line
valve
shut
monitoring
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Withdrawn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
EP02718065A
Other languages
German (de)
English (en)
Inventor
Gerd Lenzen
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
Priority claimed from DE10117899A external-priority patent/DE10117899A1/de
Application filed by Individual filed Critical Individual
Publication of EP1397658A1 publication Critical patent/EP1397658A1/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a method for monitoring a gas flow in a line between two line positions, for example between a shut-off valve and a consumer, and a system therefor.
  • Gas is used in many areas of everyday life. Above all, Gas al's fuel gas is used in heating systems and for cooking. It is known that fuel gas in particular involves considerable dangers. Escaping gas can lead to death when inhaled, but above all to gas explosions that cause buildings to collapse and ignite fires. Such incidents are caused, for example, by misconduct in a heating system or a hotplate ago. But they also result from suicide attempts, gas pipe breaks, playing 'children or incorrect operation.
  • gas losses can occur in the supply network, which of course can lead to gas explosions if they are not recognized in time.
  • gas pipes can be damaged by tree roots, construction work, earthmoving or pipe breaks.
  • Gas from gas bottles or gas tanks also entails considerable dangers, for example due to incorrect operation, defective devices, leaky connections, damaged lines. The same applies to the use of gas in the industrial sector.
  • the present invention has for its object to develop a method and a system of the type mentioned above, with which it can be determined whether gas losses occur.
  • the flow rate of the gas stream is determined at the first and the second line position and the two flow rates are compared with one another.
  • the difference between the two flow rates can be used to determine whether gas loss occurs between the two line positions. If this gas loss exceeds a certain difference value, it is preferably provided to switch off the gas flow or to give an alarm.
  • the system consists of three components, namely two quantity measuring devices and one control device.
  • the input flow meter is a commercially available gas flow meter that can be installed individually or, for example, in an urban gas meter in a building. It preferably has a digital or analog output for the transmission of the flow rate value.
  • a shut-off valve is preferably also assigned to this first flow meter.
  • the second quantity measuring device is preferably assigned to a consumer, for example a heating system.
  • a heating system for example a heating system.
  • the arrangement at any other point on the gas line is also possible. It can in turn be switched on individually in the gas line just before the heating system, or it can be integrated in the heating system. It also has a digital or analog output for the transmission of the flow value.
  • the two measured values are compared with one another in the control unit and the difference is determined.
  • This control unit continuously monitors the flow rate at both flow meters and switches off the shut-off valve if a difference is specified. In the control result, the measurement results but also the signals from the monitoring and measuring devices are processed. In the event of a fault, outputs of any number can be input or turned off. After a fault, the fault can also be acknowledged.
  • the control unit should be freely programmable via a PC connection. As an option, the control unit is also available as a control center for the gas supplier for the purpose of determining consumption.
  • the shut-off valve mentioned above is generally a main gas valve, which in turn can be installed individually or in an urban gas meter. For safety reasons, the valve should be closed when de-energized so that it switches off in the event of a power failure or fire in the house.
  • a pilot light monitor is also connected to the quantity measuring device on the consumer.
  • a corresponding thermocouple is installed for pilot light monitoring.
  • a smoke detector to the control device. This can be used to switch off the shut-off valve if, for example, a fire leads to smoke that cannot be attributed to escaping gas.
  • all houses can be equipped with central heating and gas cookers. Furthermore, houses with wall-mounted heaters in the individual apartments and gas cookers, gas network systems of the supply companies to the supplier, gas cookers and heating systems for caravans and field systems, gas supply systems (external gas tank systems) and all conceivable gas supplies in industry and trade.
  • the whole system can 'also be constructed as a compact system for the leisure market. It also consists of the control unit and two flow meters, one flow meter being assigned to the main gas valve on the gas bottle and the other flow meter to the consumer.
  • the voltage supply is variable and can range from 12 volts to 230 volts.
  • the present invention also relates to a system for monitoring a gas flow in a line in which a shut-off valve is also switched on.
  • a control unit is to be assigned to the line, which is connected to a control center. It is possible to switch the shut-off valve on and / or off via this control center. For example, this can happen if escaping gas is determined using the method described above.
  • gas consumption can be read from the control center and then a counter can also be reset.
  • This system is preferably used in connection with the method described above. However, this system can also be used independently.
  • the gas flow is brought in a gas line 1 from any storage to a consumer 2.
  • a pilot flame 3 is indicated in the consumer 2.
  • a shut-off valve 4 is also switched on in the gas line 1.
  • a quantity measuring device 5 is switched on in the line 1, with which the amount of gas which flows through the line 1 in a certain predetermined period of time can be determined.
  • the quantity measuring device 5 is connected to a control device 6.
  • a quantity measuring device 7 is also assigned to the consumer 2, which determines the amount of gas which the
  • This quantity measuring device 7 is also connected to the control device 6.
  • pilot flame 3 is assigned a pilot flame monitor 8, which determines whether a pilot flame 8 is there or not.
  • this can be a corresponding thermocouple.
  • the control device 6 is assigned a smoke detector 9, with which it is determined whether smoke is developing in particular in the vicinity of the consumer 2.
  • the control unit 6 is connected to the shut-off valve 4 via the line 10.
  • shut-off valve 4 In the normal state with consumer 2 switched off, gas is present in line 1 in front of consumer 2, the shut-off valve 4 is open. If there is no pilot flame 3, which is determined by pilot flame monitoring 8, and a gas flow is nevertheless detected by quantity meter 5 or 7, shut-off valve 4 is closed so that gas does not unnecessarily flow out of the pilot flame opening or the burning point.
  • the shut-off valve 4 remains open and the quantity measuring devices 5 and 7 determine the flow of the gas quantity. Both quantities are compared with one another in control unit 6. If the quantities determined deviate from one another to a certain extent, this means that a loss occurs in the gas line between the two quantity measuring devices, which, if it exceeds a limit value, leads to the shutoff valve 4 being switched off.
  • the smoke detector 9 monitors near the consumer 2 whether smoke is developing for other reasons. If this occurs, the shutoff valve 4 is likewise switched off via the smoke detector and the control device 6, so that a gas explosion cannot occur for other reasons.
  • a gas detector 11 can be provided, in particular for the area of the line 1 upstream of the shutoff valve 4, in order to monitor a gas leak that is not affected by the Flow meters can be determined. This happens, for example, in the basement of a house in which the main gas line opens.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Feeding And Controlling Fuel (AREA)

Abstract

L'invention concerne un procédé pour surveiller un flux gazeux dans une conduite (1) entre deux emplacements de la conduite, par exemple entre une soupape d'arrêt (4) et un consommateur (2). Selon ce procédé, le débit du flux gazeux est déterminé sur le premier et sur le deuxième emplacement de la conduite et les deux quantités mesurées sont comparées.
EP02718065A 2001-02-10 2002-01-31 Procede pour surveiller un flux gazeux Withdrawn EP1397658A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10106896 2001-02-10
DE10106896 2001-02-10
DE10117899A DE10117899A1 (de) 2001-02-10 2001-04-10 Verfahren zum Überwachen eines Gasstromes
DE10117899 2001-04-10
PCT/EP2002/000983 WO2002065084A1 (fr) 2001-02-10 2002-01-31 Procede pour surveiller un flux gazeux

Publications (1)

Publication Number Publication Date
EP1397658A1 true EP1397658A1 (fr) 2004-03-17

Family

ID=26008495

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02718065A Withdrawn EP1397658A1 (fr) 2001-02-10 2002-01-31 Procede pour surveiller un flux gazeux

Country Status (2)

Country Link
EP (1) EP1397658A1 (fr)
WO (1) WO2002065084A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08303700A (ja) * 1995-05-12 1996-11-22 Fuji Electric Co Ltd ガス漏れ検出方法
JP2863827B2 (ja) * 1995-12-28 1999-03-03 工業技術院長 ガス漏洩検知システム
US6164958A (en) * 1999-09-20 2000-12-26 Huang; Tai-Tung Safety system for gas range

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02065084A1 *

Also Published As

Publication number Publication date
WO2002065084A1 (fr) 2002-08-22

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