EP1010441A2 - Feuerlöschsprinkeranlage - Google Patents

Feuerlöschsprinkeranlage Download PDF

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Publication number
EP1010441A2
EP1010441A2 EP99124665A EP99124665A EP1010441A2 EP 1010441 A2 EP1010441 A2 EP 1010441A2 EP 99124665 A EP99124665 A EP 99124665A EP 99124665 A EP99124665 A EP 99124665A EP 1010441 A2 EP1010441 A2 EP 1010441A2
Authority
EP
European Patent Office
Prior art keywords
water
sprinkler
pressure
sprinklers
mains
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.)
Withdrawn
Application number
EP99124665A
Other languages
English (en)
French (fr)
Other versions
EP1010441A3 (de
Inventor
Bernard Cain
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.)
Project Fire Engineers Ltd
Original Assignee
Project Fire Engineers Ltd
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 Project Fire Engineers Ltd filed Critical Project Fire Engineers Ltd
Publication of EP1010441A2 publication Critical patent/EP1010441A2/de
Publication of EP1010441A3 publication Critical patent/EP1010441A3/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/02—Permanently-installed equipment with containers for delivering the extinguishing substance
    • A62C35/026—Permanently-installed equipment with containers for delivering the extinguishing substance the extinguishing material being put under pressure by means other than pressure gas, e.g. pumps

Definitions

  • This invention relates to fire sprinkler systems.
  • Fire sprinkler systems are well known for fire protection.
  • a typical sprinkler system includes a number of suitably positioned sprinklers of a type which is caused to commence operation when an abnormally high temperature is detected. Typically such detection is effected by melting of a fusible element in each sprinkler.
  • the system further comprises the necessary pipework for supplying water to the sprinklers.
  • a further method of meeting the requirements is disclosed in our British patent GB-2280368-B, which utilises a break tank for receiving water from the mains and from which pump means supplies water to the sprinkler(s).
  • the break tank may be of relatively small capacity, although the system as a whole is relatively complex.
  • a fire sprinkler system comprising:
  • the means for supplying water to the sprinkler(s) other than by way of the break tank means which means may be a direct connection between a mains supply pipe and a pipe leading to the sprinkler(s), provides for the supply of water to the sprinkler(s) when the water main is capable of delivering sufficient pressure at a flow rate suitable for satisfactory operation of the number of sprinklers in use. If the pressure falls below the predetermined value, however, for example if a fire is of a size such that a large number of sprinklers are brought into operation, or if mains water pressure is low so that a lesser number of sprinklers will not perform satisfactorily, then the pump means is brought into operation and the sprinklers are supplied by way of the break tank. In this latter condition the pump means will deliver water to the sprinklers under a pressure greater than that available from the water mains, but the check valve means prevents reverse flow of water back into the mains.
  • the pressure detection means is preferably provided at a high level in the system, and further preferably at the level of one or more highest sprinklers of the system.
  • a sprinkler system in accordance with the invention may also be a system as disclosed and/or claimed in our UK patent aforesaid.
  • the invention is also, however, applicable to simpler sprinkler systems as described hereafter.
  • a water main bringing water from a water supply authority is indicated at 50.
  • a pipe 51 is branched off the main 50, and contains an isolation valve 1 followed by a non-return valve 2.
  • the pipe extends into an enclosure or equipment cabinet or room indicated generally at 53 which contains the components described hereafter, although it will be appreciated that if desired certain components may be mounted at locations other than in the enclosure 53.
  • a pipe 54 connected to the pipe 52 has a monitored valve 3, a pressure sensitive device 4, a pressure gauge 5, and leads to a valve assembly for discharge of water into a break tank 8.
  • the valve assembly for such discharge of water may comprise small and large float operated valves 6, 7.
  • the tank 8 is further provided with water level detectors 9 and 9 a which are arranged to provide an alarm signal in the event of low or high water level in the tank 8.
  • the tank further has a drain valve 10.
  • the tank may provide for storage of a volume of about 2m 3 of water.
  • Thee pipes 55, 56, 57 lead from the tank 8 to respective booster pumps 11, 12, 13 and thence by respective non-return valves 14, 15, 16, to a manifold 58.
  • a pipe 59 having a monitored isolating valve 18 and an automatic sprinkler alarm valve 19 extends to an outlet 61 which would be connected to suitable pipework leading to one or more sprinklers.
  • Valve 19 also prevents reverse flow in the pipe 60.
  • the pipe 60 has a pressure gauge 30, pressure sensitive electrical switch 20 to provide a "low pressure alarm” signal, pressure responsive switch 21, and pressure responsive switch 22 for recording system pressure.
  • Pressure responsive switch 21 is a switch having a "dead band" between the pressures at which it switches "on” and "off".
  • a flow rate measuring device 23 which may be a device as known by the name "Annubar” and a signal transmitter 24 associated with the flow rate measuring device 23.
  • a monitored drain valve 31 There is also a monitored drain valve 31.
  • the maximum output of the three booster pumps 11, 12, 13 together is substantially not greater than the sustainable flow rate of water available from the main 50 to replenish the tank 8. Such flow rate may be ascertained by enquiring of the water supply authority.
  • manifold 58 From manifold 58 there extends a further pipe 62 having a jockey pump 32 and non-return valve 33. This pipe 62 then rejoins the pipe 60 after the valve 19. A further connection to the manifold 58 is provided for fire brigade inlets 28, 29, by way of a monitored valve 27.
  • the manifold 58 has a drain valve 17.
  • a pipe 63 extends from the pipe 60 and has a motorised valve 25 and solenoid valve 26 connected in parallel with one another, to provide for system testing when required. From these valves, the pipe 63 leads to an outlet 64 to the storage tank 8.
  • the pipe 63 may also have a branch 65 having a monitored valve 37, leading to waste.
  • control panel 34 there is also an ambient temperature sensor 35 and an electrical heater 36 to warm the vicinity of the equipment above described to prevent freezing in cold weather.
  • the control panel has associated with it suitable electrical and/or electronic circuits and devices for example including data processing means, to detect and control operation of the system components. Suitable indicating devices would be provided as required to indicate the status or condition of the components of the system, the pressures and/or flow rates existing at the different points of the system, and so on.
  • jockey pump 32 In use, provided none of the sprinklers connected to the outlet 61 is in operation and neither of the valves 25, 26 is open, jockey pump 32 operates in accordance with pressure responsive switch 21 to pressurise the pipe 60 leading to the outlet 61. A maximum water level within the storage tank 8 is established by float controlled valves 6, 7, and the system remains in equilibrium.
  • the pressure at the outlet 61 will drop and this and the resulting flow of water to such sprinkler or sprinklers, initially provided by the jockey pump 32, will be detected by flow rate measurement device 23 and pressure switch 20. Firstly in response to such detection the effect is to bring the first pump 11 into operation, and if sufficient sprinklers are operating such that the pump 11 is not able to sustain the required flow rate and pressure at the outlet 61 the further pumps 12 and 13 are brought successively into operation. As water is drawn from the tank 8 to be thus supplied to the sprinklers, the tank is replenished from the water main supply under the control of valves 6, 7.
  • a pipe 70 is branched off the pipe 54 and connected to the pipe 60.
  • the pipe 70 incorporates a check valve 71 for preventing reverse flow of water in the pipe 70, in the direction from the pipe 60 back towards the water main 50.
  • water is capable of reaching the outlet 61 and thence the sprinklers other than by way of the break tank 8, and if the main is capable of providing water at a sufficient flow rate and pressure to ensure operation in satisfactory manner of the number of sprinklers which might be brought into operation, the pumps 11 to 13 will not be brought into operation. If the pumps are brought into operation, however, which will establish a pressure in the pipe 60 greater than that in the main 50, the check valve 71 prevents reverse flow in the pipe 70.
  • FIG. 2 shows, diagrammatically, a pipe 100 which is connected to a water main 101 by way of a stop valve and non-return valve 102, 103 respectively.
  • An isolating valve 104 is provided upstream of a pipe 105 leading to the inlet control valve 106 of a break tank 107.
  • An outlet 108 from the break tank leads by way of a booster pump 109 with associated valves to a pipe 110 which leads to an outlet 111 for connection to pipework of a network of sprinklers.
  • a sprinkler alarm valve 112 which, when water flows in the pipe 110 due to the coming into operation of one or more sprinklers, provides for the supply of water to a water-operated gong 113.
  • Branching from the pipe 110 is a pump-proving line 114 incorporating a test valve 115; this leads back to the break tank 107 and enables operation of one or more sprinklers to be simulated to test operation of the pump 109 as required.
  • a pressure detector 116 detects the pressure supplied to the sprinklers by way of the outlet 111, and causes the pump 109 to operate when the pressure falls below a predetermined level.
  • the sprinkler system may include sprinklers on a number of storeys of a multi-storey building, and Figure 2 shows further outlets 111 a , 111 b leading to sprinklers on lower storeys than an upper storey fed by the outlet 111.
  • the present detector 116 is preferably provided at the level of one or more of the highest sprinklers of the system, as illustrated, since it is such high sprinklers whose operation will suffer most from any lack of mains water supply capability.
  • a connection 117 is provided between the pipe 100 and the pipe 110, enabling water to be delivered to the outlet 111 directly from the mains, i.e. not by way of the break tank 107.
  • the connection incorporates a check valve (non-return valve) 118. If the mains is capable of maintaining the required pressure at the outlet 111, the pump 109 is not brought into operation and water reaches the outlet 111 leading to the sprinklers directly and not by way of the break tank. When the pump 109 is in operation, in response to falling of the sprinkler pressure below a predetermined value, the check valve 118 prevents reverse flow of water from the pipe 110 back to the water mains.

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)
EP99124665A 1998-12-14 1999-12-10 Feuerlöschsprinkeranlage Withdrawn EP1010441A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9827434 1998-12-14
GB9827434A GB2344762A (en) 1998-12-14 1998-12-14 Fire sprinkler system

Publications (2)

Publication Number Publication Date
EP1010441A2 true EP1010441A2 (de) 2000-06-21
EP1010441A3 EP1010441A3 (de) 2000-09-06

Family

ID=10844145

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99124665A Withdrawn EP1010441A3 (de) 1998-12-14 1999-12-10 Feuerlöschsprinkeranlage

Country Status (2)

Country Link
EP (1) EP1010441A3 (de)
GB (1) GB2344762A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001032268A1 (en) * 1999-11-02 2001-05-10 Marioff Corporation Oy Installation for fighting fire

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2280368B (en) 1993-07-29 1997-03-12 Project Fire Engineers Limited Fire sprinkler systems

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4366865A (en) * 1981-04-07 1983-01-04 Makibbin James J Packaged sprinkler system using a dead water tank
US5125458A (en) * 1991-01-28 1992-06-30 Berman Steve A Fire fighting apparatus
GB2274776B (en) * 1993-02-03 1997-01-29 Malcolm John Black Small bore domestic fire fighting sprinkler system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2280368B (en) 1993-07-29 1997-03-12 Project Fire Engineers Limited Fire sprinkler systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001032268A1 (en) * 1999-11-02 2001-05-10 Marioff Corporation Oy Installation for fighting fire
US6634432B2 (en) 1999-11-02 2003-10-21 Marioff Corporation Oy Fire fighting installation including a constant power pump unit

Also Published As

Publication number Publication date
GB2344762A (en) 2000-06-21
GB9827434D0 (en) 1999-02-03
EP1010441A3 (de) 2000-09-06

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