US3297093A - Fire extinguishing apparatus comprising a buoyant hose - Google Patents

Fire extinguishing apparatus comprising a buoyant hose Download PDF

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Publication number
US3297093A
US3297093A US459387A US45938765A US3297093A US 3297093 A US3297093 A US 3297093A US 459387 A US459387 A US 459387A US 45938765 A US45938765 A US 45938765A US 3297093 A US3297093 A US 3297093A
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US
United States
Prior art keywords
diaphragm
magazine
hose
fire extinguishing
outlet opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US459387A
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English (en)
Inventor
Eriksson Lars Gustav Anders
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Svenska Skumslacknings AB
Original Assignee
Svenska Skumslacknings AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Svenska Skumslacknings AB filed Critical Svenska Skumslacknings AB
Application granted granted Critical
Publication of US3297093A publication Critical patent/US3297093A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C25/00—Portable extinguishers with power-driven pumps
    • A62C25/005—Accessories
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/06—Fire prevention, containment or extinguishing specially adapted for particular objects or places of highly inflammable material, e.g. light metals, petroleum products

Definitions

  • This invention relates to a fire extinguishing apparatus for tanks or other reservoirs for storing inflammable liquid substances and comprising a hose which is folded up in readiness in a magazine disposed in the reservoir or communicating therewith so as to be in contact with the inflammable liquid, and having an inlet for a fire extinguishing agent, preferably foam.
  • a fire extinguishing apparatus for tanks or other reservoirs for storing inflammable liquid substances and comprising a hose which is folded up in readiness in a magazine disposed in the reservoir or communicating therewith so as to be in contact with the inflammable liquid, and having an inlet for a fire extinguishing agent, preferably foam.
  • the hose has to be unfolded out of the magazine and has to rise to the surface of the liquid in the tank so that fire extinguishing agent can pass through a supply pipe to the magazine and therefrom up to the seat of fire to extinguish the fire.
  • the magazine is disposed within the tank in an inaccessible position and therefore has to be opened entirely automatically under the action of the pressure of the fire extinguishing agent supplied to the magazine and the hose.
  • the object of the invention is to provide a device by means of which the magazine is infallibly opened in case of fire.
  • the invention is in that the magazine has an opening through which the hose can be unfolded so as to be able to rise through the inflammable liquid, said opening being normally sealed by a diaphragm which because of the nature of its material, kerfs, thickness or other factors influencing its strength is adapted to burst at an internal pressure considerably lower than the external pressure exerted on the diaphragm by the inflammable liquid in the reservoir when the reservoir is filled to its maximum level.
  • the diaphragm is adapted to burst at an internal pressure of 3-30 feet of water and to withstand an external pressure of about 60 feet of water.
  • the diaphragm may be very thin and of low strength if it is sustained on its inner side by a disc or similar support which lies loose in the opening of the magazine so as to be readily thrown off as the magazine is to be opened.
  • the diaphragm may be retained at its margin by means of a clamping ring and may further be externally protected by a cap adapted to be thrown off.
  • FIG. 1 is an elevation of an apparatus comprising a device according to the invention
  • FIG. 2 is an enlarged vertical sectional view of the upper part of the hose magazine belonging to the apparatus
  • FIG. 3 is a plan of a quadrant of the diaphragm.
  • the chain-dotted lines indicate a lower part of the circumferential wall and the bottom of a tank for storing inflammable liquid substances.
  • a supply pipe for a fire extinguishing agent preferably fire extinguishing foam.
  • the supply pipe terminates within the tank and is connected to a short piece of pipe, the end of which supports a magazine 12 adapted to contain a hose in a folded state.
  • the lower open end of the hose is secured to the lower part of the magazine and is open toward the pipe 10, whereas the upper end 14 of the hose shown in FIG. 2 may be closed or open.
  • a by-pass 16 or so called shock pipe extends from the pipe 10 to the upper part of the magazine 12.
  • the upper opening 18 of the magazine is covered by a thin diaphragm 20, the inner side of which is supported by a plate or disc 22 which lies loosely on a shoulder 24 extending around the opening lid.
  • a connecting flange 26 disposed around the opening of the magazine forms a support for the margin of the diaphragm 20 outside the disc 22.
  • the diaphragm is held down on the upper surface of the flange 26 by a clamping ring 28 which is secured to the flange 26 by means of screws 39.
  • a gasket 32 is inserted between the ring 28 and the diaphragm.
  • the diaphragm and its connecting means may be shielded outwardly from the tank by means of a protective cap 34, and the rim of the cap directed toward the flange 26 may be provided with an elastic sealing ring 36 which is tongueshaped in cross-section.
  • This sealing ring may be replaced by another additional packing such as an O-ring.
  • the diaphragm is made of a material of a thickness or strength such that it will burst at an internal pressure in the magazine that is considerably lower than the external pressure exerted on the diaphragm by the inflammable liquid in the reservoir when the reservoir for the inflammable liquid is filled to its maximum level.
  • the diaphragm may be adapted to burst at an internal pressure of 330 feet of water and to withstand an external pressure of about 60 feet of water due to the support given to it by the disc 22.
  • the foam or the air in the pipe lll ahead of the foam will build up an increasing pressure in the device.
  • the pressure transmitted to the upper end of the magazine via the by-pass 16 is increased to a value somewhat higher than the external liquid pressure, the diaphragm 20 will be deflected upwards and in certain cases the loose disc 22 will be lifted.
  • the diaphragm will burst resulting in a decompression.
  • the protective cap 34 if any, will be thrown off.
  • the fire extinguishing agent also enters the hose in the magazine and unfolds the hose which will move upwards through the now uncovered opening it of the magazine, and according as the hose is filled with fire extinguishing agent it will rise in the liquid in the tank to the surface of the liquid and flow out on said surface to extinguish the fire.
  • the clamping ring 28 for the diaphragm 20 may be provided with a threaded flange and screwed onto the connecting flange 26 instead of being secured by means of screws.
  • it may have a circular or otherwise designed kerf 33 (FIG. 3).
  • the material and the thickness of the diaphragm may be suitably adapted for this purpose.
  • the diaphragm may consist of glass or an acrylic plastics material which is resistant to the action of the inflammable liquid stored in the tank, in which case an annular groove may be provided in the upper surface of the diaphragm.
  • the diaphragm may be in the form of a thin foil of a fluoric plastics material, such as polytetrafluoro ethylene (Teflon) without kerfs or grooves but so thin than it will burst at the calculated internal pressure. Due to the supportprovided by the underlying disc the diaphragm can withstand considerably higher pressures from the liquid in the tank.
  • a fluoric plastics material such as polytetrafluoro ethylene (Teflon) without kerfs or grooves but so thin than it will burst at the calculated internal pressure. Due to the supportprovided by the underlying disc the diaphragm can withstand considerably higher pressures from the liquid in the tank.
  • a fire extinguishing apparatus for tanks and other reservoirs for storing inflammable liquid to levels including a maximum level comprising a magazine disposed in the reservoir below the maximum level thereof and provided with an inlet for a fire extinguishing agent and an outlet opening, a diaphragm normally closing said outlet opening, a hose having its one end open toward said inlet and its other end closed, said hose being folded in the magazhie in a state of readiness to be developed by the fire extinguishing agent to be introduced into the hose through the inlet end thereof, a diaphragm closing said outlet opening and thus normally preventing development of the hose, said diaphragm being of a nature to burst at an interior pressure in the magazine lower than the exterior pressure exerted on the diaphragm by the inflammable liquid in the reservoir when the latter is filled with inflammable liquid to the maximum level.
  • Apparatus as claimed in claim l and further characterized by a mounting surface on the magazine encirc- [it ling the outlet opening thereof and engaged by one side of said diaphragm, a peripherally screw-threaded clamping ring engaging the other side of the diaphragm to hold it in position with its marginal portion squeezed between said ring and said mounting surface.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Fire-Extinguishing Compositions (AREA)
  • Detergent Compositions (AREA)
US459387A 1965-02-23 1965-05-27 Fire extinguishing apparatus comprising a buoyant hose Expired - Lifetime US3297093A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE231065 1965-02-23

Publications (1)

Publication Number Publication Date
US3297093A true US3297093A (en) 1967-01-10

Family

ID=20259723

Family Applications (1)

Application Number Title Priority Date Filing Date
US459387A Expired - Lifetime US3297093A (en) 1965-02-23 1965-05-27 Fire extinguishing apparatus comprising a buoyant hose

Country Status (8)

Country Link
US (1) US3297093A (ro)
DE (1) DE1559658B1 (ro)
DK (1) DK113757B (ro)
ES (1) ES312889A1 (ro)
FI (1) FI46916C (ro)
GB (1) GB1087494A (ro)
NL (1) NL6506046A (ro)
NO (1) NO116307B (ro)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3685584A (en) * 1971-05-12 1972-08-22 Eberto Gracia Arrangement for forming a water shield to extinguish fires in water covered areas
CN104436479A (zh) * 2013-09-16 2015-03-25 上海金盾消防安全科技有限公司 一种立式泡沫产生器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2599796A (en) * 1949-10-31 1952-06-10 Wicklander Anders Emanuel Means for the extinction of fire in tanks for combustible liquids
US2776716A (en) * 1951-11-09 1957-01-08 Wicklander Anders Emanuel Means for introducing a fluid agent into a tank

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1917694A (en) * 1929-03-28 1933-07-11 Nat Foam System Inc Fire extinguishing apparatus
GB689526A (en) * 1950-03-06 1953-04-01 Anders Emanuel Wicklander Improvements in fire extinguishing apparatus for tanks or other storage vessels containing combustible liquids

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2599796A (en) * 1949-10-31 1952-06-10 Wicklander Anders Emanuel Means for the extinction of fire in tanks for combustible liquids
US2776716A (en) * 1951-11-09 1957-01-08 Wicklander Anders Emanuel Means for introducing a fluid agent into a tank

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3685584A (en) * 1971-05-12 1972-08-22 Eberto Gracia Arrangement for forming a water shield to extinguish fires in water covered areas
CN104436479A (zh) * 2013-09-16 2015-03-25 上海金盾消防安全科技有限公司 一种立式泡沫产生器

Also Published As

Publication number Publication date
DE1559658B1 (de) 1970-11-12
GB1087494A (en) 1967-10-18
FI46916C (fi) 1973-08-10
ES312889A1 (es) 1965-08-16
NL6506046A (ro) 1966-08-24
DK113757B (da) 1969-04-21
FI46916B (ro) 1973-05-02
NO116307B (ro) 1969-03-03

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