SK11798A3

SK11798A3 - Method and device for checking tightness of shut-off fittings of gas burner

Info

Publication number: SK11798A3
Application number: SK11798A
Authority: SK
Inventors: Marian Hancko
Original assignee: Slovenske Energeticke Strojarn
Priority date: 1998-01-27
Filing date: 1998-01-27
Publication date: 1999-10-08

Abstract

Spôsob a zariadenie kontroly tesnosti armatúr (1), (2) a (3) pozostáva v indikácii stúpnutia, resp. poklesu tlaku plynu vo vymedzenom priestore (8) medzi armatúrami (1), (2) a (3) pomocou tlakových spínačov(4) a (5). Spôsob kontroly tesnosti armatúr (/1), (2) a (3) je vykonávaný dvoma krokmi. Prvý krok je kontrola tesnosti armatúry (1) a druhý krok je kontrola tesnosti armatúr (2) a (3) súčasne.Method and apparatus for checking the tightness of fittings (1), (2) and (3) consists of an incline indication, respectively. pressure drop gas in the defined space (8) between the fittings (1), (2) and (3) using pressure switches (4) and (5). The method of checking the tightness of the valves (/ 1), (2) and (3) is performed two steps. The first step is to check for leaks the fittings (1) and the second step is to check the tightness of the fittings (2) and (3) simultaneously.

Description

Spôsob a zariadenie kontroly tesnosti armatúr (1), (2) a (3) pozostáva v indikácii stúpnutia, resp. poklesu tlaku plynu vo vymedzenom priestore (8) medzi armatúrami (1) , (2) a (3) pomocou tlakových spínačov(4) a (5). Spôsob kontroly tesnosti armatúr (/1), (2) a (3) je vykonávaný dvoma krokmi. Prvý krok je kontrola tesnosti armatúry (1) a druhý krok je kontrola tesnosti armatúr (2) a (3) súčasne.The method and the device for checking the tightness of the fittings (1), (2) and (3) consist of an indication of inclination and / or inclination. a pressure drop of the gas in the space (8) between the fittings (1), (2) and (3) by means of the pressure switches (4) and (5). The method of checking the tightness of fittings (1), (2) and (3) is carried out in two steps. The first step is to check the tightness of the fittings (1) and the second step is to check the tightness of the fittings (2) and (3) simultaneously.

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-1Spôsob kontroly tesnosti uzatváracích armatúr plynového horáka a zariadenie na vykonávanie tohto spôsobuMethod for checking the tightness of shut-off valves of a gas burner and apparatus for carrying out the method

Oblasť technikyTechnical field

Vynález sa týka spôsobu a zariadenia kontroly tesnosti trojice uzatváracích armatúr na prívode plynu do horáka používaného v energetike pri spaľovaní vykurovacích plynov.The invention relates to a method and a device for checking the tightness of three shut-off valves for supplying gas to a burner used in power engineering for combustion of combustion gases.

Doterajší stav technikyBACKGROUND OF THE INVENTION

Doterajší stav techniky neumožňoval spôsob a zariadenie kontroly tesnosti trojice uzatváracích armatúr na prívode plynu do horáka. Každý plynový horák podľa príslušných technických noriem od určitého tepelného výkonu musí mať na prívode plynu trojicu armatúr, ktoré majú zabrániť prúdeniu plynu do spaľovacej komory ak horák nespaľuje vykurovací plyn. Trojica armatúr v usporiadaní dve armatúry v sérii a tretia medzi nimi v odvzdušnení zabezpečuje funkciu tesného uzáveru, t. j. dve armatúry v sérii sú zatvorené a tretia medzi nimi v odvzdušnení je otvorená. Týmto usporiadaním armatúr je priestor s pretlakom plynu oddelený od spaľovacieho priestoru a je znemožnené prúdenie vykurovacieho plynu do spaľovacieho priestoru. V praxi sa však stáva, že táto trojica armatúr z rôznych príčin zostala v medzipolohách otvorenia a zatvorenia a spôsobila tak prúdenie plynu do spaľovacieho priestoru. Pri následnom štarte horáka nastal v niekoľkých prípadoch výbuch.The prior art did not allow a method and apparatus to check the tightness of three shut-off valves on the gas supply to the burner. Each gas burner according to the relevant technical standards from a certain heat output must have on the gas supply three fittings to prevent gas flow into the combustion chamber if the burner does not burn fuel gas. The three fittings in the arrangement two fittings in series and the third between them in the vent provides the function of the tight closure, i. j. two valves in series are closed and the third between them in the vent is open. By this arrangement of the valves the space with gas overpressure is separated from the combustion space and the flow of heating gas into the combustion space is prevented. In practice, however, the three fittings, for various reasons, remained in the opening and closing positions, causing the gas to flow into the combustion chamber. In a subsequent burner start, an explosion occurred in several cases.

Podstata vynálezuSUMMARY OF THE INVENTION

Podstata vynálezu spočíva v určení spôsobu a návrhu zariadenia kontroly tesnosti trojice uzatváracích c plynového horáka.SUMMARY OF THE INVENTION The object of the invention is to determine a method and a design of a device for checking the tightness of a triple-closing gas burner.

Spôsob zistenia tesnosti trojice uzatváracích armatúr plynového horáka spočíva v indikácii stúpnutia a klesnutia tlaku plynu vo vymedzenom priestore medzi dvojicou armatúr usporiadaných v sérii a treťou armatúrou medzi nimi v odvzdušnení. V takto vymedzenom priestore už aj pri malej netesnosti trojice armatúr dochádza k stúpnutiu, resp. klesnutiu tlaku. Indikácia stúpnutia, resp. klesnutia tlaku spočíva v zabudovaní dvoch tlakových spínačov vo vymedzenom priestore.The method of detecting the tightness of the three gas burner shut-off fittings is to indicate a rise and fall in the gas pressure in a defined space between a pair of fittings arranged in series and a third fitting between them in a vent. Even in case of a small leakage of the three fittings, the space thus defined already increases or decreases. pressure drop. Indication of climb, respectively. The pressure drop consists in the installation of two pressure switches in the defined area.

Postup spôsobu zistenia tesnosti trojice uzatváracích armatúr je zabezpečený dvoma krokmi kontroly.The procedure for determining the tightness of three shut-off valves is provided by two inspection steps.

Prvý krok kontroly tesnosti zabezpečuje kontrolu tesnosti prvej armatúry na prívode plynu do horáka. Dvojica armatúr usporiadaných v sérii je zatvorená a tretiu armatúru v medziodvzdušnení zatvoríme. Takto vymedzený priestor medzi tými armatúrami je bez tlaku. Ak nedôjde k stúpnutiu tlaku v tomto priestore, potom prváThe first leak check step provides a leak check of the first valve at the gas inlet to the burner. The pair of valves arranged in series is closed and the third valve in the intermediate vent is closed. The space defined between these fittings is without pressure. If there is no increase in pressure in this space, then the first

-2armatúra z dvojice armatúr usporiadaných v sérii je tesná. Kontrola tlaku je vykonávaná prvým tlakovým spínačom, ktorý kontroluje stúpnutie tlaku.- The fitting of a pair of fittings arranged in series is tight. The pressure control is performed by the first pressure switch which controls the pressure rise.

Druhý krok kontroly tesnosti zabezpečuje kontrolu tesnosti druhej a tretej armatúry na prívode plynu do horáka. Dvojica armatúr usporiadaných v sérii je zatvorená a tretia armatúra v medziodvzdušnení zostáva zatvorená. Prvá armatúra z dvojice armatúr usporiadaných v sérii sa otvorí na určitú dobu, pričom vo vymedzenom priestore stúpne tlak. Potom prvú armatúru zatvoríme. Ak počas kontroly nedôjde k poklesu tlaku vo vymedzenom priestore, druhá armatúra z dvojice a tretia armatúra v medziodvzdušnení sú tesné. Kontrola tlaku je vykonávaná druhým tlakovým spínačom.The second leak check step provides a leak check of the second and third valves at the gas supply to the burner. The pair of valves arranged in series is closed and the third valve in the intermediate air vent remains closed. The first fitting of a pair of fittings arranged in series is opened for a certain period of time, while the pressure rises in the confined space. Then close the first fitting. If there is no pressure drop in the confined space during the inspection, the second fitting of the pair and the third fitting in the air vent are tight. Pressure control is performed by a second pressure switch.

Celková kontrola tesnosti trojice armatúr je úspešná, ak úspešne prešli kontrolou tesnosti uvedené armatúry v prvom a druhom kroku. Po celkovej kontrole tesnosti tretiu armatúru v medziodvzdušnení treba otvoriť, t. j. zabezpečiť funkciu tesného uzáveru.The overall tightness check of the three fittings is successful if they have successfully passed the tightness check of said fittings in the first and second steps. After a complete leak check, the third valve in the air vent must be opened, ie. j. ensure tight seal function.

Prehľad obrázku na výkreseOverview of the figure in the drawing

Vysvetlenie vynálezu je pomocou obrázku č. 1 - prvý krok kontroly a obrázku č. 2 - druhý krok kontroly.The explanation of the invention is by means of FIG. 1 - the first step of inspection and figure no. 2 - the second step of inspection.

Príklad uskutočnenia vynálezuDETAILED DESCRIPTION OF THE INVENTION

Na obrázku č. 1 a č. 2 je definovaný spôsob a návrh zariadenia na kontrolu tesnosti trojice armatúr na prívode plynu do horáka.In the picture no. 1 and no. 2, a method and a design of a device for checking the tightness of three fittings on the gas supply to the burner are defined.

Spôsob zistenia tesnosti trojice uzatváracích armatúr I, 2, 3 plynového horáka 6 spočíva v indikácii stúpnutia tlaku plynu na tlakovom spínači 4 a klesnutia tlaku plynu na tlakovom spínači 5 vymedzenom priestore 8 medzi dvojicou armatúr 1, 2 a treťou armatúrou 3 v medziodvzdušnení. V takto vymedzenom priestore 8 už aj pri malej netesnosti trojice armatúr I, 2, 3 dochádza k stúpnutiu, resp. klesnutia tlaku.The method of detecting the tightness of the three shut-off valves 1, 2, 3 of the gas burner 6 consists in indicating an increase in the gas pressure at the pressure switch 4 and a decrease in the gas pressure at the pressure switch 5 in the space 8 between the pair of valves 1, 2 and the third valve 3. Even in the case of a small leak of the three fittings I, 2, 3, the space 8 defined in this way 8 increases or decreases. pressure drop.

Prvý krok kontroly tesnosti - obrázok č. 1 zabezpečuje kontrolu tesnosti prvej armatúry I na prívode plynu 7 do horáka 6. Dvojica armatúr I a 2 je zatvorená a tretiu armatúru 3 v medziodvzdušnení zatvoríme. Takto vymedzený priestor 8 medzi armatúrami i, 2, 3 je bez tlaku. Ak nedôjde k stúpnutiu tlaku na tlakovom spínači 4, potom prvá armatúra I j e tesná.The first step of tightness check - picture no. 1 ensures the tightness of the first fitting I at the gas inlet 7 to the burner 6. The pair of fittings 1 and 2 is closed and the third fitting 3 is closed in the intermediate air. The space 8 thus defined between the fittings 1, 2, 3 is depressurized. If the pressure at the pressure switch 4 does not increase, then the first valve 1 is tight.

Druhý krok kontroly tesnosti - obrázok č. 2 zabezpečuje kontrolu tesnosti druhej 2 a tretej armatúry 3 na prívode plynu 7 do horáka 6. Dvojica armatúr I a 2 je zatvorená a tretia armatúra 3 zostáva zatvorená. Potom prvá armatúra I sa otvorí na krátku dobu, pričom vo vymedzenom priestore 8 stúpne tlak. Po uplynutí krátkej doby prvú armatúru I zatvoríme. Ak počas kontroly nedôjde k poklesu tlaku na tlakovom spínači 5 vo vymedzenom priestore 8 tak druhá armatúra 2 a tretia armatúra 3 v medziodvzdušnení sú tesné. Celková kontrola tesnosti trojice armatúr I, 2, 3 je úspešná, ak úspešne prešli kontrolou tesnosti armatúry 1, 2, 3 v prvom aThe second step of tightness check - picture no. 2 ensures the tightness of the second valve 2 and the third valve 3 at the gas supply 7 to the burner 6. The pair of valves 1 and 2 is closed and the third valve 3 remains closed. Thereafter, the first fitting I opens for a short period of time, while the pressure in the confined space 8 rises. After a short time, the first valve I is closed. If during the inspection there is no pressure drop on the pressure switch 5 in the defined space 8, the second fitting 2 and the third fitting 3 in the intermediate vent are tight. The overall tightness check of the three fittings 1, 2, 3 is successful if they have successfully passed the tightness check of fittings 1, 2, 3 in the first and

-3druhom kroku. Po celkovej kontrole tesnosti tretiu armatúru 3 v medziodvzdušnení treba otvoriť, t. j. zabezpečiť funkciu tesného uzávera, armatúra i a 2 zatvorená armatúra 3 otvorená a vymedzený priestor 8 bez tlaku.-3the second step. After a complete leak check, the third valve 3 in the intermediate air bleed must be opened, i.e.. j. to ensure the function of the tight closure, fitting i and 2 closed fitting 3 open and delimited space 8 without pressure.

Priemyselná využiteľnosťIndustrial usability

Spôsob a zariadenie kontroly tesnosti uzatváracích armatúr plynového horáka podľa vynálezu možno využiť tam, kde sú použité plynové horáky s automatickým riadením pri spaľovaní vykurovacích plynov od tepelného výkonu 3,5 MW a viac.The method and the device for checking the tightness of the shut-off valves of a gas burner according to the invention can be used where gas-controlled automatic gas burners are used in the combustion of combustion gases from a heat output of 3.5 MW and more.

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-4PATENTOVÉ NÁROKY-4PATENT CLAIMS

1. Spôsob kontroly tesnosti trojice armatúr /1/, /2/a/3/ vyznačujúci saA method for checking the tightness of three fittings (1), (2) and (3) characterized by

Claims

Method for checking the tightness of three fittings (1), (2) and (3), characterized in that the tightness of these fittings is checked in two steps, the first step checking the tightness of the fittings (1) by increasing the gas pressure on the pressure switch (4) in the confined space (8) and the second step is to check the tightness of the fittings (2), (3) by decreasing the gas pressure at the pressure switch (5) in the confined space (8).

Method for checking the tightness of the three fittings (1), (2), (3) according to claim 1, characterized in that the defined space (8) is formed in the first tightness checking step by closed fittings (1), (2) and closing the third fitting (3) and in the second leakage control step, the space (8) is formed by the closed fittings (1), (2) and (3), and the first valve (1) needs to be opened for a short time to increase the pressure in the space (8).

3. A device for checking the tightness of three fittings, characterized in that a pressure switch (4) is replaceable downstream of the valve (1) and a pressure switch (5) is replaceable upstream of the valve (2).

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