NZ771569B2 - Dry sprinkler assembly - Google Patents

Dry sprinkler assembly Download PDF

Info

Publication number
NZ771569B2
NZ771569B2 NZ771569A NZ77156919A NZ771569B2 NZ 771569 B2 NZ771569 B2 NZ 771569B2 NZ 771569 A NZ771569 A NZ 771569A NZ 77156919 A NZ77156919 A NZ 77156919A NZ 771569 B2 NZ771569 B2 NZ 771569B2
Authority
NZ
New Zealand
Prior art keywords
tube
dry sprinkler
pipe element
assembly according
sprinkler assembly
Prior art date
Application number
NZ771569A
Other versions
NZ771569A (en
Inventor
Stephen Pechacek
Original Assignee
Victaulic Company
Filing date
Publication date
Application filed by Victaulic Company filed Critical Victaulic Company
Priority claimed from PCT/US2019/047627 external-priority patent/WO2020041550A1/en
Publication of NZ771569A publication Critical patent/NZ771569A/en
Publication of NZ771569B2 publication Critical patent/NZ771569B2/en

Links

Classifications

    • 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
    • A62C3/002—Fire prevention, containment or extinguishing specially adapted for particular objects or places for warehouses, storage areas or other installations for storing goods
    • A62C3/004—Fire prevention, containment or extinguishing specially adapted for particular objects or places for warehouses, storage areas or other installations for storing goods for freezing warehouses and storages
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/58—Pipe-line systems
    • A62C35/62—Pipe-line systems dry, i.e. empty of extinguishing material when not in use
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/58—Pipe-line systems
    • A62C35/68—Details, e.g. of pipes or valve systems
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C37/00—Control of fire-fighting equipment
    • A62C37/08—Control of fire-fighting equipment comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
    • A62C37/10—Releasing means, e.g. electrically released
    • A62C37/11—Releasing means, e.g. electrically released heat-sensitive
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C37/00—Control of fire-fighting equipment
    • A62C37/08—Control of fire-fighting equipment comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
    • A62C37/10—Releasing means, e.g. electrically released
    • A62C37/11—Releasing means, e.g. electrically released heat-sensitive
    • A62C37/14—Releasing means, e.g. electrically released heat-sensitive with frangible vessels

Abstract

dry sprinkler assembly for fire suppression uses a tube within a pipe element to maintain a spring loaded valve in a closed position at the end of the pipe element connected to a piping network. The tube is held against the biasing force of the valve's spring by a plug acted on by the temperature sensitive trigger of the sprinkler mounted on the opposite end of the pipe element. The assembly has a flow conditioning collar engaged with the tube and overlying a portion of openings in the sidewall of the tube. The sprinkler assembly achieves a discharge rate equal to or greater than a k factor of 17.

Claims (21)

What is claimed is:
1. A dry sprinkler assembly for use with a piping network of a fire suppression system, said dry sprinkler assembly comprising: a pipe element having a first end attachable in fluid communication with said piping network; 10 a valve positioned within said pipe element proximate to said first end, said valve having a closed configuration preventing fluid flow through said pipe element, and an open configuration permitting fluid flow through said pipe element; a fire suppression sprinkler mounted on a second end of said pipe element, said sprinkler defining a bore in fluid communication with said pipe element and comprising: 15 a temperature sensitive trigger assembly having a first configuration engaged with said bore when an ambient temperature is below a predetermined threshold and a second configuration released from engagement with said bore when said ambient temperature reaches or exceeds said predetermined threshold; and a tube coaxially positioned within said pipe element, said tube having an outer 20 perimeter smaller than an inner perimeter of said pipe element and being moveable lengthwise along said pipe element, said valve being mounted on a first end of said tube, wherein said tube comprises a sidewall defining a plurality of openings therethrough; and a flow conditioning collar engaged with said tube proximate to a second end thereof, said collar overlying at least a portion of said plurality of openings in said sidewall of said 25 tube; wherein when said valve is in said open configuration and said temperature sensitive trigger assembly is released from said engagement with said bore, said sprinkler assembly achieves a discharge rate equal to or greater than a k factor of 17.
2. The dry sprinkler assembly according to claim 1, wherein said tube has a 30 round cross section with an outer diameter smaller than an inner diameter of said pipe element. 5
3. The dry sprinkler assembly according to claim 1, wherein said openings comprise a plurality of slots oriented lengthwise along said tube.
4. The dry sprinkler assembly according to claim 1, wherein a portion of said sidewall proximate to said second end of said tube has no openings therethrough.
5. The dry sprinkler according to claim 1, wherein said openings comprise at least 10 30% of a surface area of said sidewall.
6. The dry sprinkler assembly according to claim 1, wherein said valve comprises: a seat mounted proximate to said first end of said pipe element; a platform pivotably mounted on said first end of said tube; an obturation body mounted on said platform, said obturation body being 15 pivotable between a first position facing said seat and engageable therewith, and a second position angularly oriented relative to said seat.
7. The dry sprinkler assembly according to claim 6, wherein said obturation body comprises a Bellville washer.
8. The dry sprinkler assembly according to claim 1, further comprising: 20 a pivot support mounted on said first end of said tube; a platform pivotably mounted on said pivot support; a stop surface positioned on said pivot support; a projection extending from said platform and engageable with said stop surface to limit pivoting motion of said platform. 25
9. The dry sprinkler assembly according to claim 6, further comprising a biasing spring acting between said tube and said platform for biasing said obturation body into said second position.
10. The dry sprinkler assembly according to claim 1, wherein said sprinkler comprises: 5 a body defining said bore; a pair of arms extending from said body away from said second end of said pipe element; a deflector plate mounted on said arms, said temperature sensitive trigger assembly being positioned between said deflector plate and said pipe element. 10
11. The dry sprinkler assembly according to claim 10, wherein said temperature sensitive trigger assembly comprises a frangible vial filled with a heat sensitive liquid.
12. The dry sprinkler assembly according to claim 10, wherein said sprinkler comprises at least one stop surface engageable with said tube to limit sliding motion thereof relative to said pipe element. 15
13. The dry sprinkler assembly according to claim 12, wherein said stop surface comprises at least one projection extending from one of said arms.
14. The dry sprinkler assembly according to claim 13, wherein said sprinkler further comprises a nipple extending from said body, said nipple having male screw threads thereon.
15. The dry sprinkler assembly according to claim 12, wherein: 20 said sprinkler comprises a shoulder on said body, said shoulder projecting into said bore, said shoulder defining said at least one stop surface; said tube comprises at least one detent projecting outwardly therefrom, said at least one detent being positioned in spaced relation from said second end of said tube and engageable with said at least one stop surface upon motion of said tube within said pipe 25 element.
16. The dry sprinkler according to claim 15, wherein said shoulder comprises an annulus surrounding said bore.
17. The dry sprinkler according to claim 15, wherein said body comprises female threads surrounding said bore. 5
18. The dry sprinkler assembly according to claim 1, wherein said temperature sensitive trigger assembly comprises a plug.
19. The dry sprinkler assembly according to claim 18, wherein said plug comprises a plurality of plug bodies engageable with said bore, said plug bodies defining a gap permitting draining of condensate from said pipe element. 10
20. The dry sprinkler assembly according to claim 19, further comprising a trigger bearing engageable with said plurality of plug bodies.
21. The dry sprinkler assembly according to claim 1, wherein said pipe element has a wall thickness less than 0.095 inches (2.4 mm).
NZ771569A 2019-08-22 Dry sprinkler assembly NZ771569B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862721753P 2018-08-23 2018-08-23
PCT/US2019/047627 WO2020041550A1 (en) 2018-08-23 2019-08-22 Dry sprinkler assembly

Publications (2)

Publication Number Publication Date
NZ771569A NZ771569A (en) 2023-11-24
NZ771569B2 true NZ771569B2 (en) 2024-02-27

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