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Title: Explosion suppression system

Abstract

An explosion suppression system and triggering apparatus therefor are provided for quenching gas and dust explosions. An electrically actuated suppression mechanism which dispenses an extinguishing agent into the path ahead of the propagating flame is actuated by a triggering device which is light powered. This triggering device is located upstream of the propagating flame and converts light from the flame to an electrical actuation signal. A pressure arming device electrically connects the triggering device to the suppression device only when the explosion is sensed by a further characteristic thereof beside the flame such as the pioneer pressure wave. The light powered triggering device includes a solar panel which is disposed in the path of the explosion and oriented between horizontally downward and vertical. Testing mechanisms are also preferably provided to test the operation of the solar panel and detonator as well as the pressure arming mechanism.

Inventors:
 [1];  [2]
  1. (Finleyville, PA)
  2. (Pittsburgh, PA)
Publication Date:
Research Org.:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
OSTI Identifier:
868329
Patent Number(s):
US 5119877
Assignee:
United States of America as represented by Secretary of (Washington, DC) NETL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
explosion; suppression; triggering; apparatus; provided; quenching; gas; dust; explosions; electrically; actuated; mechanism; dispenses; extinguishing; agent; path; ahead; propagating; flame; device; light; powered; located; upstream; converts; electrical; actuation; signal; pressure; arming; connects; sensed; characteristic; beside; pioneer; wave; solar; panel; disposed; oriented; horizontally; downward; vertical; testing; mechanisms; preferably; operation; detonator; pressure wave; located upstream; preferably provided; electrically connects; electrically actuated; quenching gas; extinguishing agent; explosion suppression; /169/250/340/

Citation Formats

Sapko, Michael J., and Cortese, Robert A. Explosion suppression system. United States: N. p., 1992. Web.
Sapko, Michael J., & Cortese, Robert A. Explosion suppression system. United States.
Sapko, Michael J., and Cortese, Robert A. Wed . "Explosion suppression system". United States. doi:. https://www.osti.gov/servlets/purl/868329.
@article{osti_868329,
title = {Explosion suppression system},
author = {Sapko, Michael J. and Cortese, Robert A.},
abstractNote = {An explosion suppression system and triggering apparatus therefor are provided for quenching gas and dust explosions. An electrically actuated suppression mechanism which dispenses an extinguishing agent into the path ahead of the propagating flame is actuated by a triggering device which is light powered. This triggering device is located upstream of the propagating flame and converts light from the flame to an electrical actuation signal. A pressure arming device electrically connects the triggering device to the suppression device only when the explosion is sensed by a further characteristic thereof beside the flame such as the pioneer pressure wave. The light powered triggering device includes a solar panel which is disposed in the path of the explosion and oriented between horizontally downward and vertical. Testing mechanisms are also preferably provided to test the operation of the solar panel and detonator as well as the pressure arming mechanism.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1992},
month = {Wed Jan 01 00:00:00 EST 1992}
}

Patent:

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  • In accordance with the present invention, an explosion suppression system and triggering apparatus are provided for quenching gas and dust explosions where such explosions are characterized by a flame propagating along a path. The suppression system includes an electrically actuated suppression means for dispensing an extinguishing agent into the path ahead of the propagating flame. A triggering device for the suppression means then includes a light powered triggering means located upstream along the path of the propagating flame from the suppression means. This light powered triggering means receives light from the propagating flame and converts this light to an electricalmore » actuation signal for the suppression means.« less
  • This patent describes a suppression system for quenching gas and dust explosions, which suppression system is electrically powered solely by light radiated by a characteristic flame of an explosion propagating along a path adjacent to the system. It comprises an electrically actuated suppression means; a triggering device for supplying the suppression means with the electrical energy for activation.
  • an optical flame and explosion detection system is described that has first and second channels with each of the channels being responsive to different combustion products and detecting radiation from the combustion products and converting the radiation into electrical signals. A filter is provided in each of the channels to limit the spectral response to a narrow band. The levels of the radiation are ascertained by level detectors which provide first and second signals when predetermined signal levels are reached in the first and second channels. A ratio of the two electrical signals from the first and second channels ismore » ascertained. When a predetermined level is reached from the ratio of the electrical signals and also for the individual signals, an output signal is produced which can be utilized in actuating alarms and other devices.« less
  • A method is described for cutting a partially below ground work piece having a desired cutting area, a longitudinal axis and an outer wall, utilizing a tool configured for preventing the explosive build up of residual gases from the cutting operation in the area surrounding the work piece, comprising the following steps: (a) providing a tool comprising a main body, wherein there is formed a longitudinal cavity therethrough, the main body having a first end and a second end, and inner and outer walls, the main body being configured to slidingly envelope the work piece longitudinally, and form a circulationmore » cavity juxtaposed to the inner wall of the main body and the outer wall of the tool, the circulation cavity extending from the second end of the tool out of the first end, forming an exit opening; circulation means for providing a flow of non-flammable fluid medium through the circulation cavity and out of the exit opening; and a plurality of excavation jets emanating from the second end of the main body, the excavation jets configured for jetting a pressured, fluid excavation medium about the periphery of the work piece, displacing the ground about the work piece, and allowing the longitudinal migration of the tool about the work piece; (b) slidingly enveloping the work piece with the tool; (c) initiating a flow of pressurized fluid through the excavation jets; (d) allowing the excavation jets to excavate, displacing the ground about the exterior periphery of the work piece, forming ground particles; (e) initiating the circulation means for directing the displaced ground particles out of the excavation area; (f) allowing the tool to migrate in downward fashion longitudinally about the work piece until the second end of the main body is below the desired cutting area on the work piece; (g) cutting the work piece; (h) releasing flammable gas through the outer wall; and (i) allowing the circulation means to direct the flammable gas out of the cutting area.« less
  • A reactor system for producing useful thermal energy and valuable isotopes, such as plutonium-239, uranium-233, and/or tritium, in which a pair of sub-critical masses of fissile and fertile actinide slugs are propelled into an ellipsoidal pressure vessel. The propelled slugs intercept near the center of the chamber where the concurring slugs become a more than prompt configuration thereby producing a fission explosion. Re-useable accelerating mechanisms are provided external of the vessel for propelling the slugs at predetermined time intervals into the vessel. A working fluid of lean molten metal slurry is injected into the chamber prior to each explosion formore » the attenuation of the explosion's effects, for the protection of the chamber's walls, and for the absorbtion of thermal energy and debris from the explosion. The working fluid is injected into the chamber in a pattern so as not to interfere with the flight paths of the slugs and to maximize the concentration of working fluid near the chamber's center. The heated working fluid is drained from the vessel and is used to perform useful work. Most of the debris from the explosion is collected as precipitate and is used for the manufacture of new slugs.« less