WO1984002280A1 - A sprinkler unit - Google Patents

A sprinkler unit Download PDF

Info

Publication number
WO1984002280A1
WO1984002280A1 PCT/DK1983/000113 DK8300113W WO8402280A1 WO 1984002280 A1 WO1984002280 A1 WO 1984002280A1 DK 8300113 W DK8300113 W DK 8300113W WO 8402280 A1 WO8402280 A1 WO 8402280A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve body
bulb
seal
bore
outer end
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.)
Ceased
Application number
PCT/DK1983/000113
Other languages
French (fr)
Inventor
Allan Jacobsen
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.)
GW Sprinkler AS
Original Assignee
GW Sprinkler AS
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 GW Sprinkler AS filed Critical GW Sprinkler AS
Priority to AU23349/84A priority Critical patent/AU2334984A/en
Priority to GB08418152A priority patent/GB2141337B/en
Priority to DE3390396T priority patent/DE3390396C2/en
Publication of WO1984002280A1 publication Critical patent/WO1984002280A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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

Definitions

  • the invention relates to a sprinkler unit of the type defined in the introductory portion of claim 1 which is supplied from the factory in an assembled state, ready for mounting in situ in an existing piping for the supply of a fire extinguishing fluid in buildings and the like.
  • Such sprinkler units are assembled at the factory by insertion of the bulb into engagement with the bushing and subsequent insertion of the seal and the valve body, and the assembled unit is then subjected to pressure tests according to current standards.
  • German Offenlegungsschrift 2 300 434 discloses a sprinkler unit of the stated type in which a dual bulp is inserted into the valve body which is to be inserted from the outside to engage the seal, and the bulb and the valve body are then fixed against the inner end of the body by the tightening of the bushing at the outer end of the body. This insertion operation is complicated, and the seal will be under a constant pressure due to the fixed state.
  • the British Patent Specification 1 582 360 discloses a sprinkler unit of the same type in which the inner end of the bulb is journalled directly in the outer end of the valve body, and the flow passage of the fluid is substantially circular-cylindrical in shape, the surface of the bore in the body having a recess for receiving the seal.
  • This structure requires special care in the mounting operation , and it is not certain that the valve body will not be sucked backwards and release the bulb in the event that a negative pressure is generated in the piping when the piping is drained.
  • the object of the invention is to provide a sprinkler unit of the stated type without these drawbacks.
  • the invention also relates to a method of assembling such a sprinkler unit and of the type defined in the introductory portion of claim 2, said method being characterized by the steps defined in the characterizing portion of claim 2.
  • the seal is quite simply placed around the valve body and is urged down by the collar formed by the second shoulder on the valve body surface when the valve body with applied 0-ring is pressed from within out toward the bulb first applied.
  • the pres sure fluid then automatically presses the seal into position between the shoulders at the crank in the flow passage without any additional manual operations being needed, and the seal will then act both as a locking ring for the valve body against possible inward movement of the valve body in case of a reduction in the pressure in the piping, and as an equalizing means for partial absorption of tensions caused by random variations in the bulb length, without this being at the expense of the sealing function.
  • the seal will be completely ejected with certainty so that a new bulb can be inserted unimpededly.
  • the 0-ring absorbs the rest of the length variation tensions and provides addi t i onal protection against bulb rupture during assembling.
  • valve body seal may expediently be an 0-ring of the same material as the 0-ring serving to journal the bulb, preferably VITON R which can resist temperatures up to 250°C.
  • fig. 1 is a longitudinal section of the sprinkler unit of the invention, ready for sale, and
  • fig. 2 is a longitudinal section of the sprinkler unit during its assembling at the factory.
  • the sprinkler unit of the invention comprises a body 1 with external threads 9 for application to an existing piping in a fire extinguishing system, a bore 6 serving as a flow channel and having a sealing face 8 which is expanded through an internal shoulder and which may be parallel with the axial direction or form an angle with said direction of up to 15°.
  • the body 1 is moreover conventionally extended outwards with two supporting legs 10 which mount a bushing 11 as an outer attachment for the sprinkler bulb 5 of a conventional profile.
  • the valve body 2 of the sprinkler is formed as an end sleeve with a cavity to receive the inner end of the bulb 5 and with an expanded end portion with an external shoulder for a sealing member 3 in the form of an 0-ring forming a tight seal, and an internal shoulder for a second 0-ring 4 to provide an elastic attachment of the neck portion of the bulb 5 and to absorb, together with the seal 3, the expansions and contractions of the bulb caused by changes in the ambient temperature.
  • the sealing face 7 of the valve body 2 may be parallel with the axial direction or form an angle with said direction of up to 15°.
  • the sprinkler unit of the invention is assembled at the factory by passing the bulb 5 through the bore 6 in the body 1 and centering it in the bushing 11. Then the valve body 2 with the seal 3 applied to it is passed into the bore 6, as shown in fig. 2. The assembling of the sprinkler unit is completed by subjecting it to a rated test pressure from the inlet side, and the seal 3 then automatically slides into the locking position, as shown in fig. 1.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)

Abstract

The body (1) of the sprinkler unit and the valve body (2) are formed with three cooperating shoulders in the flow pasage (6, 7, 8) to accommodate a seal (3) which, in the working state, serves both as a locking ring for the valve body (2) and to partly elastically absorb changes in the bulb length caused by variations in the ambient temperature, while an 0-ring (4) between the valve body (2) and the bulb (5) absorbs the remaining tensions. The seal (3) automatically slides into position during the obligatory pressure test of the unit, and it is ejected automatically together with the bulb in the event of a release.

Description

A sprinkler unit
The invention relates to a sprinkler unit of the type defined in the introductory portion of claim 1 which is supplied from the factory in an assembled state, ready for mounting in situ in an existing piping for the supply of a fire extinguishing fluid in buildings and the like.
Such sprinkler units are assembled at the factory by insertion of the bulb into engagement with the bushing and subsequent insertion of the seal and the valve body, and the assembled unit is then subjected to pressure tests according to current standards.
The German Offenlegungsschrift 2 300 434 discloses a sprinkler unit of the stated type in which a dual bulp is inserted into the valve body which is to be inserted from the outside to engage the seal, and the bulb and the valve body are then fixed against the inner end of the body by the tightening of the bushing at the outer end of the body. This insertion operation is complicated, and the seal will be under a constant pressure due to the fixed state.
The British Patent Specification 1 582 360 discloses a sprinkler unit of the same type in which the inner end of the bulb is journalled directly in the outer end of the valve body, and the flow passage of the fluid is substantially circular-cylindrical in shape, the surface of the bore in the body having a recess for receiving the seal. This structure requires special care in the mounting operation , and it is not certain that the valve body will not be sucked backwards and release the bulb in the event that a negative pressure is generated in the piping when the piping is drained.
The British Patent Specification 1 595 116 and the German Offenlegungsschrift 2 921 304 disclose a sprinkler unit of a similar type in which the outer end of the bulb, without any intermediate valve body, engages the body through the seal, which upon insertion is kept in place by insertion of a thin tubular bushing. The fragile end of the bulb is unprotected during the mounting operation, and in case of release the seal will hang in the body and thus impede out-flow of the fluid.
The object of the invention is to provide a sprinkler unit of the stated type without these drawbacks.
This object is achieved according to the invention with a sprinkler unit of the type defined in the characterizing portion of claim 1.
The invention also relates to a method of assembling such a sprinkler unit and of the type defined in the introductory portion of claim 2, said method being characterized by the steps defined in the characterizing portion of claim 2.
When the sprinkler unit of the invention is assembled at the factory, the seal is quite simply placed around the valve body and is urged down by the collar formed by the second shoulder on the valve body surface when the valve body with applied 0-ring is pressed from within out toward the bulb first applied.
During the subsequent obligatory pressure test the pres sure fluid then automatically presses the seal into position between the shoulders at the crank in the flow passage without any additional manual operations being needed, and the seal will then act both as a locking ring for the valve body against possible inward movement of the valve body in case of a reduction in the pressure in the piping, and as an equalizing means for partial absorption of tensions caused by random variations in the bulb length, without this being at the expense of the sealing function. In the event of a release, the seal will be completely ejected with certainty so that a new bulb can be inserted unimpededly. The 0-ring absorbs the rest of the length variation tensions and provides addi t i onal protection against bulb rupture during assembling.
The valve body seal may expediently be an 0-ring of the same material as the 0-ring serving to journal the bulb, preferably VITON R which can resist temperatures up to 250°C.
The invention will be explained more fully below with reference to the drawing, in which
fig. 1 is a longitudinal section of the sprinkler unit of the invention, ready for sale, and
fig. 2 is a longitudinal section of the sprinkler unit during its assembling at the factory.
As shown in fig. 1, the sprinkler unit of the invention comprises a body 1 with external threads 9 for application to an existing piping in a fire extinguishing system, a bore 6 serving as a flow channel and having a sealing face 8 which is expanded through an internal shoulder and which may be parallel with the axial direction or form an angle with said direction of up to 15°. The body 1 is moreover conventionally extended outwards with two supporting legs 10 which mount a bushing 11 as an outer attachment for the sprinkler bulb 5 of a conventional profile.
The valve body 2 of the sprinkler is formed as an end sleeve with a cavity to receive the inner end of the bulb 5 and with an expanded end portion with an external shoulder for a sealing member 3 in the form of an 0-ring forming a tight seal, and an internal shoulder for a second 0-ring 4 to provide an elastic attachment of the neck portion of the bulb 5 and to absorb, together with the seal 3, the expansions and contractions of the bulb caused by changes in the ambient temperature. Like the sealing face 8 of the body 1, the sealing face 7 of the valve body 2 may be parallel with the axial direction or form an angle with said direction of up to 15°.
The sprinkler unit of the invention is assembled at the factory by passing the bulb 5 through the bore 6 in the body 1 and centering it in the bushing 11. Then the valve body 2 with the seal 3 applied to it is passed into the bore 6, as shown in fig. 2. The assembling of the sprinkler unit is completed by subjecting it to a rated test pressure from the inlet side, and the seal 3 then automatically slides into the locking position, as shown in fig. 1.

Claims

P a t e n t c l a i m s :
1. A sprinkler unit for use in systems for temperature responsive supply of a pressurized fluid through a piping to extinguish fires in buildings, comprising a body (1) for stationary application to the piping and having an axial central bore (6) extending therethrough, a valve body (2) substantially axially movable with respect to the body in the bore of said body, a seal (3) which is a tight fit between the body and the valve body in the working state, and aheat rupturable bulb (5) whose outer end is inserted between a bushing (11) at the free end of supporting legs (10) protruding outwardly from the body, the inner end of said bulb being journalled against the outer end of the valve body (2), the pressurized fluid flow passage (6, 7, 8) between the surface of the bore (6) in the body (1) and the surface of the valve body (2) being formed with a crank (7, 8) in the form of complementary engagement shoulders for the seal (3) at said two faces, c h a r a c t e riz e d in that the inner end of thebulb (5) is journalled against the outer end of the valve body (2) through an 0-ring (4), and that the flow passage (6, 7, 8) is profiled with a second shoulder on the valve body (2), said second shoulder being disposed upstream and caused to engage with the seal and move it along upon outward movement of the valve body.
2. A method of assembling a sprinkler unit of the type stated in claim 1, c h a r a c t e r i z e d by inserting the bulb (5) from within through the bore
(6, 7, 8) in the body (1) to journal the outer end of the bulb in the bushing (11), then inserting the valve body (2) with inserted 0-ring (4) and loosely applied seal (3) through the bore into engagement with the inner end of the bulb, and subjecting the unit thus assembled to pressure tests according to current standards, which causes the seal to be pressed into position without additional manipulations.
PCT/DK1983/000113 1982-12-07 1983-12-06 A sprinkler unit Ceased WO1984002280A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU23349/84A AU2334984A (en) 1982-12-07 1983-12-06 Sprinklerenhed
GB08418152A GB2141337B (en) 1982-12-07 1983-12-06 A sprinkler unit
DE3390396T DE3390396C2 (en) 1982-12-07 1983-12-06 Sprinkler unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK541382A DK148075C (en) 1982-12-07 1982-12-07 A sprinkler

Publications (1)

Publication Number Publication Date
WO1984002280A1 true WO1984002280A1 (en) 1984-06-21

Family

ID=8142237

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1983/000113 Ceased WO1984002280A1 (en) 1982-12-07 1983-12-06 A sprinkler unit

Country Status (7)

Country Link
US (1) US4657085A (en)
EP (1) EP0129568A1 (en)
AU (1) AU2334984A (en)
DE (1) DE3390396C2 (en)
DK (1) DK148075C (en)
GB (1) GB2141337B (en)
WO (1) WO1984002280A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0853958A3 (en) * 1997-01-18 1998-11-11 Grinnell Manufacturing (UK) Limited A tubular member and method of supporting same

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4739835A (en) * 1986-06-23 1988-04-26 Central Sprinkler Corp. Quick response glass bulb sprinkler
US4796420A (en) * 1987-11-13 1989-01-10 Van Wormer Management Corporation Fusible link construction
DE4233043A1 (en) * 1992-10-01 1994-04-07 Total Feuerschutz Gmbh Temperature sensor
US5299645A (en) * 1993-01-06 1994-04-05 Globe Fire Sprinkler Corporation Fire extinguisher sprinkler construction
US5494114A (en) * 1993-01-06 1996-02-27 Globe Fire Sprinkler Corporation Fire extinguisher sprinkler construction
US5667017A (en) * 1994-09-17 1997-09-16 Awab Umformtechnik Gmbh & Co. Kg Atomizer for generating water-mists in fire-fighting systems
DE19618092A1 (en) 1996-05-06 1997-11-13 Total Feuerschutz Gmbh Excitation element
US5829532A (en) 1997-03-07 1998-11-03 Central Sprinkler Corporation Low pressure, early suppression fast response sprinklers
US6336509B1 (en) 1997-03-07 2002-01-08 Central Sprinkler Corporation Low pressure fast response bulb sprinklers
US6059044A (en) * 1998-05-15 2000-05-09 Grinnell Corporation Fire protection sprinkler and deflector
US7165624B1 (en) 1998-05-15 2007-01-23 Grinnell Corporation Early suppression fast response fire protection sprinkler
US6183106B1 (en) * 1999-03-04 2001-02-06 Streamlight, Inc. Shock absorbent flashlight bulb and reflector assembly
US6585054B1 (en) * 1999-05-28 2003-07-01 The Viking Corporation Fast response sprinkler head and fire extinguishing system
US6976543B1 (en) 2000-11-22 2005-12-20 Grinnell Corporation Low pressure, extended coverage, upright fire protection sprinkler
US6554077B2 (en) 2001-04-12 2003-04-29 The Reliable Automatic Sprinkler Co., Inc. Quick response adjustable automatic sprinkler arrangements
US6854668B2 (en) * 2002-04-29 2005-02-15 Victaulic Company Of America Extended coverage ordinary hazard sprinkler system
US8327946B1 (en) 2002-07-19 2012-12-11 Tyco Fire Products Lp Dry sprinkler
US7516800B1 (en) 2002-07-19 2009-04-14 Tyco Fire Products Lp Dry sprinkler
US7854269B2 (en) * 2005-04-01 2010-12-21 The Viking Corporation Sprinkler assembly
US8789615B2 (en) * 2005-04-01 2014-07-29 The Viking Corporation Sprinkler assembly
USD616062S1 (en) 2009-03-25 2010-05-18 The Viking Corporation Deflector for fire protection sprinkler
US8376061B2 (en) * 2009-04-29 2013-02-19 The Viking Corporation Fire protection sprinkler
JP5767900B2 (en) * 2011-08-24 2015-08-26 株式会社東芝 Underwater welding apparatus and method
US8662190B2 (en) 2011-11-01 2014-03-04 The Viking Corporation Flow shaper for use in corridor sprinkler
US10549135B2 (en) 2012-02-07 2020-02-04 Marioff Corporation Oy Water mist fire suppression sprinkler with a polymer seal

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1118526A (en) * 1966-07-12 1968-07-03 Angus George Co Ltd Improvements in sprinklers for fixed fire installations
DE2019817A1 (en) * 1969-04-23 1970-12-03 Gw Sprinkler As sprinkler
DE2300434A1 (en) * 1972-01-07 1973-07-12 Firemaster Extinguisher Ltd DISPENSER HEAD FOR A FIRE EXTINGUISHER
US4109727A (en) * 1975-09-06 1978-08-29 Job Eduard J Dual-seal sprinkler system
GB1582360A (en) * 1977-04-02 1981-01-07 Angus Fire Armour Ltd Fire extinguishant sprinklers

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1349935A (en) * 1970-09-16 1974-04-10 Firemaster Extinguisher Ltd Fire extinguishing apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1118526A (en) * 1966-07-12 1968-07-03 Angus George Co Ltd Improvements in sprinklers for fixed fire installations
DE2019817A1 (en) * 1969-04-23 1970-12-03 Gw Sprinkler As sprinkler
DE2300434A1 (en) * 1972-01-07 1973-07-12 Firemaster Extinguisher Ltd DISPENSER HEAD FOR A FIRE EXTINGUISHER
US4109727A (en) * 1975-09-06 1978-08-29 Job Eduard J Dual-seal sprinkler system
GB1582360A (en) * 1977-04-02 1981-01-07 Angus Fire Armour Ltd Fire extinguishant sprinklers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0853958A3 (en) * 1997-01-18 1998-11-11 Grinnell Manufacturing (UK) Limited A tubular member and method of supporting same

Also Published As

Publication number Publication date
GB2141337B (en) 1986-09-17
AU2334984A (en) 1984-07-05
DK541382A (en) 1984-06-08
GB2141337A (en) 1984-12-19
EP0129568A1 (en) 1985-01-02
GB8418152D0 (en) 1984-08-22
DK148075C (en) 1985-07-29
DE3390396T1 (en) 1985-10-03
DE3390396C2 (en) 1995-04-27
DK148075B (en) 1985-02-25
US4657085A (en) 1987-04-14

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