WO1999066137A1 - Water supply apparatus - Google Patents
Water supply apparatus Download PDFInfo
- Publication number
- WO1999066137A1 WO1999066137A1 PCT/AU1999/000502 AU9900502W WO9966137A1 WO 1999066137 A1 WO1999066137 A1 WO 1999066137A1 AU 9900502 W AU9900502 W AU 9900502W WO 9966137 A1 WO9966137 A1 WO 9966137A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water
- reticulation
- fire
- domestic
- supply apparatus
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C35/00—Permanently-installed equipment
- A62C35/58—Pipe-line systems
- A62C35/60—Pipe-line systems wet, i.e. containing extinguishing material even when not in use
Definitions
- This invention relates to water supply apparatus for supplying water services, eg fire water, cold water and hot water to a water usage area.
- This invention finds particular application in high rise residential or office buildings, eg buildings of ten or more stories and it will be convenient to herein describe the invention with reference to this application. However it is to be clearly understood that the invention is capable of broader application, eg industrial buildings.
- domestic water is to be understood to refer to water which is suitable for ablutions and consumption, such as bath, kitchen and laundry water.
- fire water is to be understood to refer to water for fire-fighting such as fire hose water and for sprinkler water.
- multi-storey buildings have several discrete and separate water supply apparatus for the three different water supplies in the building, for example domestic water supply and fire water supply in the form of fire sprinkler supply and fire hydrant supply.
- Each of these discrete water supplies has its own storage tank, its own pump and its own reticulation.
- duplication of tanks, pumps and reticulation with this set-up is high and substantial cost savings could be realised if somehow this duplication of apparatus could be rationalised or reduced.
- a water supply apparatus for a water usage area, the apparatus including: a fire water reticulation means; a domestic water reticulation means; and a water supply means for supplying water to the water usage area, the fire reticulation means and the domestic water reticulation means being operatively coupled to the water supply means.
- a multi-storey building is divided up into a plurality of pressure zones at different heights in the building, the number of zones being dependant on the height of the building.
- the apparatus has a separate pressure zone for each 12 to 18 floors of the building.
- the extent of the pressure zone depends on the maximum and minimum pressures permitted for water supply at individual points within the building.
- the domestic water reticulation means and the fire water reticulation means may be divided into a lower reticulation zone and at least one upper reticulation zone, the lower reticulation zone being mountable in a lower portion of the building, and the, or each, upper reticulation zone being mountable in a respective upper zone of the building.
- the domestic water reticulation means and the fire water reticulation means may be divided into a lower reticulation zone and an upper reticulation zone.
- the water supply apparatus may include a water storage means, in which water for the domestic water reticulation means and for the fire water reticulation means is stored.
- the water supply apparatus includes a single water storage means.
- the water storage means may include at least one water tank.
- the water supply apparatus may also include a pumping means, which is arranged in fluid communication between the water storage means and the domestic and fire water reticulation means to pump water through the domestic and fire water reticulation means.
- the pumping means may include one pumping station, which is arranged in fluid communication between the water storage means and both the lower and upper zones of the domestic and fire water reticulation means to pump water to both the lower and upper reticulation zones.
- the pumping means may include at least two pumping stations, a pumping station being arranged in fluid communication between the water storage means and each respective reticulation zone of the domestic and fire water reticulation means to pump water to each reticulation zone, respectively.
- the same pumping means is used to pump both domestic and fire water around the building.
- the single water storage means and a single pumping means is used to pump water for both domestic water services and fire fighting water services to all points within the building and it is not necessary to have the normal three discrete pumping means and three discrete water tanks.
- Each pumping station may include a number of pump sets, each pump set including a pump and a motor.
- Each pump set may be of the type which is of variable speed and which is controllable via a suitable electronic processor.
- the electronic processor may be capable of performing continual analysis of the pressure and volumetric flow of water.
- each motor may be an electric motor.
- each pump may be typically a centrifugal pump, for example, a multi-stage centrifugal pump.
- the water supply apparatus may include a sensing means for sensing pressure and flow characteristics of water pumped from the, or each, pumping station.
- the apparatus may include a control means for controlling the pressure and flow characteristics of the water pumped from the, or each, pumping station.
- the control means may be operable on receipt of a signal from the sensing means.
- the water supply apparatus may include a water conduit means arranged in fluid communication between the pumping station and each reticulation zone of the domestic and fire water reticulation means.
- the water supply apparatus may include a water conduit means arranged in fluid communication between each pumping station and its respective reticulation zone of the domestic and fire water reticulation means.
- the domestic water reticulation means may include a cold water reticulation means and a hot water reticulation means.
- the water supply apparatus may include a hot water generating means.
- the hot water generating means may comprise a boiler and a hot water storage means.
- each, water tank may be positioned proximate a base of the building.
- the pumps may also be located proximate a base of the building.
- the apparatus further includes fire hose reels, fire hydrants, and fire sprinkler valves on each storey of the building, the said hydrants, reels and valves being operatively connected to the fire water reticulation means.
- the apparatus further includes valves or taps and the like on each floor operatively connected to the domestic water reticulation means.
- a water supply apparatus for reticulating water services to a multi-storey building.
- the apparatus including: a water storage means for storing water to be reticulated; a water pumping means operatively communicating with the water in the water storage means by means of a conduit means; a domestic water reticulation means for reticulating domestic water to various levels of the building operatively connected to the water pumping means; and a fire water reticulation means for reticulating fire water to various levels of the building also operatively connected to the water pumping means.
- the domestic water reticulation means may include a plurality of zones corresponding to different levels of height in the building, including a relatively lower reticulation zone for servicing a relatively lower level of the building and a relatively higher reticulation zone for servicing a corresponding relatively higher level of the building, and wherein the fire reticulation means also includes a plurality of zones corresponding to different levels in the building, including a relatively lower reticulation zone for servicing a relatively lower level of the building, and a relatively higher reticulation zone for servicing a corresponding relatively higher level of the building.
- the pumping means may include a relatively higher pressure pumping station and a relatively lower pressure pumping station, wherein said lower reticulation zones of said fire water and domestic water reticulation means are operatively coupled to said relatively lower pressure pumping stations, and said upper reticulation zones of said domestic and fire water reticulation means are operatively coupled to said relatively higher pressure pumping stations.
- a higher pressure pumping means is used to pump both domestic water and fire water to higher levels of the building and a lower pressure pumping means is used to pump both domestic and fire water to the lower levels of the building.
- the pumping means may deliver water at a single delivery pressure for use throughout the building and wherein pressure reducing means are operatively coupled in line with said lower reticulation portion of said domestic water and fire reticulation means for limiting the water supply in said lower portions within predetermined pressure limits.
- the water pumping means may draw water from a common water storage means.
- FIG. 1 is a schematic flow sheet of a first embodiment of a water supply apparatus in accordance with the invention
- FIG. 2 is a schematic flow sheet of a second embodiment of a water supply apparatus in accordance with invention.
- FIG. 3 is a schematic flow sheet of a pumping station of the first embodiment of the water supply apparatus.
- FIG. 4 is a schematic flow sheet of a water storage means for either of the apparatus of Fig. 1 or Fig. 2.
- reference 1 generally indicates a first embodiment of a water supply apparatus, in accordance with the invention.
- the apparatus 1 includes a domestic water reticulation means 2 and a fire water reticulation means 3.
- the domestic water reticulation means 2 and the fire water reticulation means 3 are connected to a single water source 4, in parallel with each other.
- the apparatus 1 is mounted in a multi-storey building (not shown). The building is divided up into two pressure zones, namely a high zone 5 and a low zone 6. It follows that the reticulation means 2, 3 are divided into a higher reticulation level 7 and a lower reticulation level 8. i
- Each zone 5, 6 includes, in this example, seventeen floors of the building. It will be appreciated that the size of the zones 5, 6 depends on the maximum and minimum pressures permitted for water supply at individual points within the building.
- the apparatus 1 includes a water storage means 9 in which water for both reticulation means 2, 3 is stored.
- the water storage means 9 includes a pair of water tanks 10.
- the apparatus 1 includes a pumping means in the form of a pumping station 11.
- the pumping station 11 is arranged in fluid communication between the water tanks 10 and the water reticulation means 2, 3.
- an inlet of the pumping station 11 is in fluid communication with the water tanks 10 via valves 12. 0
- the pumping station 11 has a pair of valved outlets 13, 14.
- One of the valved outlets 13 is in fluid communication with the fire water reticulation means 3 via a first fire water conduit 15 and a second fire water conduit 16.
- the first fire water conduit 15 directs fire water to the lower reticulation zone 8 while the second5 fire water conduit 16 directs fire water to the higher reticulation zone 7.
- a pressure reducing valve assembly 17 is positioned in the first fire water conduit 15 to reduce the pressure of the fire water supply to the lower reticulation zone 8.
- the valve assembly 17 is such that the pressure is reduced to an acceptable level for fire water use in the building. 0
- a fire hydrant 18, a fire hose reel 19 and a fire sprinkler valve 20 are each connected to the first fire water conduit 15.
- a fire hydrant 21 , a fire hose reel 22 and a fire sprinkler valve 23 are connected to the second fire water conduit 16.
- the devices 18 to 20 are positioned in the lower zone 6 of the building while the devices 21 to 23 are positioned in the higher zone 5 of the building.
- the valve outlet 14 is connected to the domestic water reticulation means 2 via a primary domestic water conduit 24.
- a first subsidiary domestic water conduit 26 is connected to the primary domestic water conduit 24 to direct water to the lower reticulation zone 8.
- a valve or stopcock 27 is mounted in the first subsidiary conduit 26.
- a pressure reducing valve assembly 43 is mounted in the first subsidiary water conduit 26.
- the valve assembly 43 is such that the pressure is reduced to an acceptable level for domestic use.
- a second subsidiary domestic water conduit 28 is also connected to the primary domestic water conduit 24 to direct water to the higher reticulation zone 7.
- a valve or stopcock 44 is mounted in the conduit 28.
- Fig. 3 there is set out a schematic flow sheet of the pumping station 11.
- the pumping station 11 includes an inlet manifold 45 which is connected to the tanks 10 via the valves 12.
- Four primary pumps 46 are connected, in parallel, to the inlet manifold 45.
- a subsidiary, or jockey pump 47 is also connected to the inlet manifold 45, in parallel with the primary pumps 46.
- the pumps 46, 47 are all connected, in parallel to an outlet manifold 48.
- valved outlets 13, 14 are connected, in parallel, to the outlet manifold 48.
- the valved outlet 13 includes a flow switch 50 and an isolating valve 51 positioned downstream of the flow switch 50.
- the valved outlet 14 includes a motorised cold water isolating valve 52.
- the valve 52 is operable, remotely, to control, or cut off, the flow of cold water from the outlet manifold 48.
- the valved outlet 14 also includes a manual isolating valve 53 positioned downstream of the valve 52.
- the pumping station 11 includes a control system 54 to control the flow of water through the outlet manifold 48.
- the system 54 includes a flow indicator 55, a pressure relief valve 56 and a flow measuring device 57.
- the devices 55, 56 and 57 are mounted in a water feedback line 58 which is connected between the outlet manifold 48 and an inlet of the tanks 10.
- the flow measuring device 57 is mounted in series with the line 58 while the flow indicator 55 and the pressure relief valve 56 are mounted in parallel to the line 58.
- valve 52 and the flow switch 50 can be operable on signals generated .by the devices 55, 56 and 57.
- the water storage means 9 includes a pair of float valves 59.
- a float valve 59 is positioned in each water tank 10 to ensure that a maximum level 63 of water in the tanks 10 is not exceeded.
- a manually operable valve 60 is positioned on each tank 10 so that water can be supplied to the tanks 10, manually, in the event of a system failure.
- the storage means 9 further includes an electrically driven valve 61 mounted in each tank 10.
- An electronic level control device 62 is connected to each valve 61 so that the level within the tanks 10 can be controlled electronically.
- the electronic level control device 62 is configured to ensure that the water level in the tanks 10 does not fall below a minimum level 64 for domestic water supply. Further, at a level 65 below the minimum level 64 for the domestic water supply, an alarm will be triggered via a signal generated by the device 62. Water below the level 65 is reserved for the fire water reticulation means 3.
- valves 59, 60 and 61 are connected to a water mains line 66.
- the apparatus 1 includes a hot water generating plant 29 in the form of a boiler for heating the water.
- the plant 29 is connected to the primary water conduit 24 via a suitable arrangement which includes a pressure reducing valve 30.
- the plant 29 is in the form of a conventional boiler which would be well known to persons skilled in the art and will not be described in further detail in the specification.
- First and second hot water conduits 31 and 32 direct hot water to the higher and lower reticulation zones 7,8 respectively.
- Hot water return conduits 33, 34 are connected to the conduits 31 and 32, respectively, to circulate water back to the plant 29.
- a valve or stopcock 35 is connected to the hot water conduit 31 while a valve or stopcock 36 is connected to the hot water conduit 32.
- reference 40 generally indicates a second embodiment of a water supply apparatus, in accordance with the invention.
- like reference numerals refer to like parts, unless otherwise specified.
- the apparatus 40 has two pumping stations 41 and 42 which are connected together in parallel whereas the apparatus 1 has only one pumping station 11.
- the pumping station 41 serves to pump both domestic and fire water to the lower reticulation zone 8.
- the second pumping station 42 by contrast, pumps both domestic and fire water to the higher reticulation zone 7. It follows that the pumping stations 41 , 42 have different pumping characteristics.
- the pumping station 42 provides both fire water and domestic water at a delivery head which is greater than that provided by the first pumping station 41.
- the first and second pumping stations 41, 42 are suitable for situations where a user is required to specifically tailor the characteristics of the water supplied to the different water reticulation zones 7, 8.
- the pressure reducing valve assemblies 17, 43 are not required.
- the provision of the pumping stations 41 , 42 provides flexibility of operation since the pressure flow characteristics of the higher and lower zones 7,8 can be altered independently of each other.
- the apparatus 1 , 40 includes a means for inhibiting cross-contamination of fire water and domestic water.
- a means can for example be in the form of a suitable valve arrangement.
- an appendix is attached, merely by way of a particular example.
- the detailed and specific nature of the appendix should in no way detract from the broad concept of this invention.
- a particular advantage of the apparatus 1, 40 is that the reticulation means 2, 3 is such that water to the reticulation means 2, 3 can be supplied from a single source. It will be appreciated that this leads to substantial savings in the costs of building and maintenance as only one tank and one pumping system will have to be supplied and/or maintained.
- a further particular advantage of the apparatus 1, 40 is that the pumps are in use continually. As a result, the performance of these pumps can be tested continually and kept in sound working order.
- the running costs of the apparatus 1 , 40 are lower than similar apparatus presently used.
- the reason for this is, as set out before, that only one pump system and one water supply system is required.
- the arrangement of the reticulation means 2, 3 and the pumps is such that domestic operating pressure and fire operating pressure can be supplied to the reticulation means 2,3 via a single pumping system.
- a multi-storey building usually has water supply tanks positioned at each of a number of service levels and on the roof of the building. Water from a mains is pumped to the tanks. The water for those levels in the building immediately beneath the service levels and the roof must be pressurised by pumps to achieve a desired pressure. It is therefore necessary for such buildings to have pressurising pumps installed in addition to the pumps used for pumping water to the supply tanks.
- the invention provides a means whereby this duplication of pumps is lessened with a resultant large saving in costs and time consumption.
- this invention serves to lessen such duplication of work.
- the main reason for this is that a single pumping means provides sufficient pressure for both domestic and fire water supply.
- the control system 54 facilitates electronic and remote control over the apparatus 1 , 40. This has the effect of enhancing the efficiency of the apparatus 1 , 40.
- operation of the apparatus 1 , 40 can be adjusted to suit fluctuating demands on domestic and fire water supply.
- the fact that the apparatus 1, 40 can be remotely controlled permits the apparatus 1 , 40 to be used with a plurality of buildings in a particular water usage area.
- This design is utilising a single source water supply to provide water to the following services within "Renaissance on George” Residential Towers.
- the proposal of this design is to combine the required operation on Fire and domestic requirements into one basic pumping plant utilising Variable Speed drive controllers to match the flow rate and pressures required with the system demands.
- Fire piping would be separated from hydraulic pipes as shown on Drawing No. 5 and run via the standard pipe routes.
- a system of multiple pumps and VFD controllers would provide the booster requirements for specific zones within a building as per Drawing No. 1 & 3.
- Table 1 The table above shows the range of pressures typically required between zones. This allows the domestic and fire requirements to be met as per the relevant standards.
- the flow rates required are typically set by the case of both hydrant and sprinkler fire requirement being met at once. In this case the hydraulic water requirements can be met by the use of multi-pump variable speed drive systems
- a 31 and 27 storey building requires a single supply pumping plant to cover all requirements.
- Zone 1 21 Ol/s vs 800kPa Zone 2 20.0I/S S 1270kPa Max 35.01/s vs 1270kPa
- Zone 1 301/s vs 1050kPa Zone 2 301/s vs 1540kPa +50% 451/s vs 1000kPa Max 401/s vs 950kPa B.
- Zone 1 30.01/s vs 1050kPa
- Zone 2 30.01/s vs 1540kPa
- the only other pump selection criterion is the sphere size passing for the pump is 8mm as the flow is below 1890 l/m.
- the selected pumps are:
- the Selected pumps are:
- a backup gen-set is provided to supply power in case of a mains power failure.
- the control procedure is detailed in the flow chart. The main consideration is that if a fire is active when the power fails then the gen-set will continue to function until manually reset if a fire is not present the system reverts to mains power in case of resumption of mains power.
- the Marlin controller receives a "FIRE" signal to which the controller will ignore any signal that tells the pump- station to go into shutdown mode. In this mode the Low Pressure & High Pressure shutdown will not activate. In case of a VFD failure the system will operate at full speed with all pumps on DOL contractor operation.
- the system has been designed to accommodate the requirements of the relevant codes and also to indicate the actual system status of the Pump-Station. Listed in Table 6 are all the indicators and modes of system faults that are indicated on the Marlin interface and on the switchboard door.
- the Southern Cross system allows variation from zero flow to full flow in an adjustable time, typically less that 5 sec and from full flow to zero in less than 1 sec.
- the use of multiple pumps provides an additional backup in case of pump failure, in case with a 33% reduction in case of 1 pump failure, which brings the flow back to the design max flow for the Fire system.
- Pumping system will be manually re-set from fire mode to normal operating conditions.
- Stand by power generator will start automatically within 30 seconds (max) in case of power failure and after another 30 seconds will reach its full efficiency. Processor will be re-set in 30 - 60 seconds.
- Proposed single source water supply system is designed to provide the complete water supply installation for domestic and fire fighting purposes for two residential towers.
- the system is designed in accordance with all requirements of Building Code of Australia, AS2941, AS2419, AS2118, all relevant standards and local authority regulations.
- Water storage tank will have a total working capacity required for domestic, fire hydrant and fire sprinkler systems.
- Electronic level control device will operate main water supply inlet valves, rising alarm when water level will drop below the minimum level reserved for fire fighting purposes. Fire alarm mode will automatically switch off water level alarm signal.
- Water storage tank is divided in order to provide mi ⁇ 50% of total storage capacity all the time. Float valves will control makeup water supply to the tank during low water demand period, i.e. night hours. Manual inlet valve will provide continuous water supply to the tank in case of electric valves failure.
- Each tower is divided into three pressure zones:
- Both residential towers will have a common electric hot water generating plant and common hot water recirculation system divided into two pressure zones.
- Hot water storage tanks will be pressurised by the mains or atmospheric pressure. This system will provide equal cold and hot water pressure in each outlet Domestic hot water reticulation is shown on drawing No. 2.
- Fire system is designed in accordance with AS2118.6-1995 requirements.
- Proposed single source water supply system for this project is new in Hydraulic Engineering and will create extremely reliable, efficient and energy saving water supply system for domestic and fire services installation.
- Stand-by power generator will provide uninterrupted power supply to all cold water / fire pumps.
- Central Electric hot water system will manufacture hot water on demand only and main pumps will deliver hot water to all outlets. Circulating hot water pumps are not required. Hot water generating plant will be connected by modem to Central Building Control Unit.
- Central Energy Management Unit will control all systems including Air-Conditioning.
- Routine weekly fire pumps testing is not required. During each 5.0 min duration pumps test water is dumped to the drain.
- Proposed system will increase building and all occupants safety. Automatic water supply cut-off will provide extra warning in case of fire. • Easy operation control
- Hot water generating plants and pumping station will have modem connection with central building control unit providing all information and technical data as hot water temperature and flow, cold water flow and pressure, hot and cold water usage etc. Building Control operator will be able to change pumps pressure form PC installed in Operations Room if required.
- Proposed system will provide substantial maintenance cost savings for cold and hot water installations, fire service and pumping station. Faulty pump can be replaced or removed for repair without interruption to hot and cold water supply.
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- 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
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU44919/99A AU769598B2 (en) | 1998-06-18 | 1999-06-18 | Water supply apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPP4206 | 1998-06-18 | ||
AUPP4206A AUPP420698A0 (en) | 1998-06-18 | 1998-06-18 | Water supply apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1999066137A1 true WO1999066137A1 (en) | 1999-12-23 |
WO1999066137A9 WO1999066137A9 (en) | 2000-07-06 |
Family
ID=3808452
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU1999/000502 WO1999066137A1 (en) | 1998-06-18 | 1999-06-18 | Water supply apparatus |
Country Status (2)
Country | Link |
---|---|
AU (1) | AUPP420698A0 (en) |
WO (1) | WO1999066137A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2389042A (en) * | 2002-05-28 | 2003-12-03 | Noel Binder | Fire fighting installation |
EP1562828A1 (en) * | 2002-09-23 | 2005-08-17 | Raoul G. Fima | Systems and methods for controlling water consumption |
CN108187290A (en) * | 2017-12-20 | 2018-06-22 | 中国中元国际工程有限公司 | End water-test device of automatic fire-extinguishing sprinkler system case |
CN108277846A (en) * | 2018-03-20 | 2018-07-13 | 昆明理工大学 | A kind of integration adjustable constant-pressure water supply installation and its control method |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3294105A (en) * | 1963-04-29 | 1966-12-27 | Syncroflo Inc | Combination domestic and firewater pumping system |
-
1998
- 1998-06-18 AU AUPP4206A patent/AUPP420698A0/en not_active Abandoned
-
1999
- 1999-06-18 WO PCT/AU1999/000502 patent/WO1999066137A1/en active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3294105A (en) * | 1963-04-29 | 1966-12-27 | Syncroflo Inc | Combination domestic and firewater pumping system |
Non-Patent Citations (2)
Title |
---|
DERWENT ABSTRACT, Accession No. 1978-E6879A, Class Q42; & SU 566908 A (FEDOTOV KB) 5 August 1977. * |
DERWENT ABSTRACT, Accession No. 1980-E2164C; Class Q42; & SU 684104 A (MOSC. TYP. EXP. DES) 15 September 1979. * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2389042A (en) * | 2002-05-28 | 2003-12-03 | Noel Binder | Fire fighting installation |
EP1562828A1 (en) * | 2002-09-23 | 2005-08-17 | Raoul G. Fima | Systems and methods for controlling water consumption |
EP1562828A4 (en) * | 2002-09-23 | 2007-01-03 | Raoul G Fima | Systems and methods for controlling water consumption |
CN108187290A (en) * | 2017-12-20 | 2018-06-22 | 中国中元国际工程有限公司 | End water-test device of automatic fire-extinguishing sprinkler system case |
CN108277846A (en) * | 2018-03-20 | 2018-07-13 | 昆明理工大学 | A kind of integration adjustable constant-pressure water supply installation and its control method |
Also Published As
Publication number | Publication date |
---|---|
WO1999066137A9 (en) | 2000-07-06 |
AUPP420698A0 (en) | 1998-07-09 |
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