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Machine translation
1. (WO1980002887) AN IMPROVEMENT IN GAS-OPERATED PRESSURE OSCILLATION GENERATORS OF THE DIAPHRAGM VALVE TYPE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/002887    International Application No.:    PCT/SE1980/000165
Publication Date: 24.12.1980 International Filing Date: 11.06.1980
IPC:
B08B 5/00 (2006.01), G10K 9/04 (2006.01)
Applicants:
Inventors:
Priority Data:
7905050 11.06.1979 SE
Title (EN) AN IMPROVEMENT IN GAS-OPERATED PRESSURE OSCILLATION GENERATORS OF THE DIAPHRAGM VALVE TYPE
(FR) AMELIORATION AUX GENERATEURS D"OSCILLATIONS DE PRESSION ACTIONNES PAR UN GAZ, DU TYPE A SOUPAPE A DIAPHRAGME
Abstract: front page image
(EN)The invention relates to gas-operated pressure oscillation generators of the diaphragm valve type, particularly pneumatically operated sound emitters used in cleaning inside spaces of furnaces, heat exchangers and similar apparatus, through which gas is flown such as hot flue gases or exhaust gases from chemical processes tending to form a dust deposit on the surfaces in the space. In such cleaning operations gas-carried pressure oscillations of sound or infrasound frequency are used for physically actuating the dust of the deposit. In such applications it is necessary to cool the interior of the pressure oscillation generator and to blow away dust particles in order not to jeopardize or impair the operation of the generator. According to the invention, a scavenging gas at substantially lower pressure than that of the operating gas is supplied to the interior of the pressure oscillation generator through one or more scavenging gas openings (16) in the seat (7) of the diaphragm valve, said openings being arranged adjacent the surface (10) of the seat engaged by the diaphragm (11).
(FR)Generateurs d"oscillations de pression actionnes par un gaz, du type a soupape a diaphragme, en particulier des emetteurs de sons actionnes pneumatiquement utilises dans le nettoyage des espaces internes de fourneaux, echangeurs de chaleur et appareils similaires au travers desquels des gaz s"ecoulent tels que des gaz de fumee chauds ou des gaz echappement provenant de reactions chimiques, tendant a former un depot de poussieres sur les surfaces. Dans de telles operations de nettoyage, des oscillations de pression, portees par un gaz, de frequence sonique ou infrasonique sont utilisees pour la mise en mouvement des poussieres de ce depot. Dans de telles applications il est necessaire de refroidir l"interieur du generateur d"oscillations de pression et de disperser les particules de poussiere afin de ne pas entraver ou mettre en danger le generateur. Un gaz d"evacuation a une pression sensiblement inferieure a celle du gaz d"actionnement est envoye a l"interieur du generateur d"oscillations de pression au travers d"une ou plusieurs ouvertures de gaz de balayage (16) dans le siege (7) de la vanne a diaphragme, lesdites ouvertures etant disposees adjacentes a la surface (10) du siege engage par le diaphragme (11).
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)