Report of Investigations 9365: Flame-Powered Trigger Device for Activating Explosion Suppression Barrier

Details

• Journal Article:
  Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9365
• Personal Author:
  Cornwell, Ronnie J. ; Sapko, Michael J.
• Description:
  The U.S. Bureau of Mines has developed a flame-radiation-powered trigger device to explosively activate suppression barriers to quench gas and coal dust explosions. The major component of the device is a silicon solar panel, which converts radiation from the developing explosion into electrical energy to initiate an electric detonator, which releases an extinguishing agent into the advancing flame front. Solar panels that are rated to produce 20 w of electrical power when exposed to the sunlight are producing about 200 w when exposed to a full-scale dust explosion. The solar panel is electrically isolated from the detonator by a pressure-sensitive switch until the arrival of the precursor pressure pulse, which always precedes a deflagration. This combination of pressure arming and flame-powered photogenerator prevents false barrier activation and requires no external power supply. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Dust Explosions Fires Mining Occupational Health Safety
• Keywords:
  Blast-resistant-structures; Underground-explosions; Solar-panels; Coal-dust; Dust-explosions; Mine-gases; Barriers; Coal-mines; Explosion-proofing; Safety-engineering
• Source:
  Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9365, 1991; :1-10
• Series:
  NIOSH Numbered Publications   ; Mining Publications  
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRC - Pittsburgh Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  16 pdf pages
• NIOSHTIC Number:
  nn:10009158
• NTIS Accession Number:
  PB91230268
• Federal Fiscal Year:
  1991
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:aba2c6f39f67553fdea0a75134ec2a53fc5588cd575a6cfeed0390bde5db4d8670c828ab17e1cce7285473fc24a8b17cd66e6fc03809e8a3061093f281f12607
• Download URL:
  https://stacks.cdc.gov/view/cdc/10141/cdc_10141_DS1.pdf
• File Type:
  [PDF - 1.77 MB ]