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2 022 586

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C1

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IPC

(21) (22)

Application

4795846/12, 1990-01-17

(22)

Actual filing date

1990-01-17

(45)

Published

1994-11-15

(72)

Inventor

Lapin V.A.Chuprikov A.E.Bushmakov V.N.

(73)

Holder

Rossijskij Nauchno-Issledovatel'Skij Institut Gornospasatel'Nogo Dela

END VALVE OF MINE FIRE-FIGHTING PIPELINE Russian patent published in 1994 - IPC

Abstract RU 2022586 C1

FIELD: fighting underground fires in dead-end mine workings. SUBSTANCE: end valve has body 1 with throat 2 secured on which is a hydraulic cylinder 3 with piston 4 and calibrated spring 5. Throat accommodates locking plugs 6 with circular recess 7 receiving a pin 8 fastened on piston 4. In case of a short-term pressure rise in pipeline 13 above service level, said pressure acts through channels 12 on piston 4 which overrides resistance of spring 5 and is displaced. Pin 8 comes out of recess 7 and releases locking plug 6 which pops out of throat 2 and frees the passage for fire extinguishant. EFFECT: improved design. 1 dwg

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RU 2 022 586 C1

Authors

Lapin V.A.

Chuprikov A.E.

Bushmakov V.N.

Dates

1994-11-15—Published

1990-01-17—Filed

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