CN102312467B - Stable air-pressure fire water supply system - Google Patents
Stable air-pressure fire water supply system Download PDFInfo
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- CN102312467B CN102312467B CN201110167066.6A CN201110167066A CN102312467B CN 102312467 B CN102312467 B CN 102312467B CN 201110167066 A CN201110167066 A CN 201110167066A CN 102312467 B CN102312467 B CN 102312467B
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Abstract
The invention discloses a stable air-pressure fire water supply system. In the stable air-pressure fire water supply system, a non-diaphragm type air-pressure water pot with a bigger volume is adopted; a spare air-pressure water pot, a water replenishing pump and an air-pressure compressor are additionally arranged; the two air-pressure water pots are connected with each other through a connecting water tank; the operations of the water replenishing pump and the air-pressure compressor are controlled in the manner of changing the water level and the pressure of the connecting water tank; two water replenishing pumps or two air-pressure compressors can be simultaneously started or singly started according to a practical condition, thereby not only being capable of reasonably utilizing the resource but also being capable of ensuring the safety, reliability and stability of the stable air-pressure fire water supply system. The stable air-pressure fire water supply system not only can be applied in a thermal power fire water supply system but also can be applied to a nuclear power fire water supply system which is characterized by short fire pump starting time, large water consumption at initial fire stage, high water supply pressure and strict system safety demand.
Description
Technical field
The present invention relates to power plant fire fighting device, refer in particular to a kind of air-pressure fire pressure-stabilizing water supply system.
Background technology
The eighties in 20th century, China started to introduce million kilowatt nuclear power technology from France.This technology Shi Yi US Westinghouse company standard 312 heap types are prototype, by improving mass, build, and develop into standardized CPY technology.In order to improve export competitiveness, the Framatome of France has formed the M310 heap type of safety and better economy on the basis of CPY.Daya Bay Nuclear Power Plant introduces this M310 heap type, and China has carried out digestion, absorption and the innovation work of million kilowatt large commercial nuclear power technology simultaneously.Daya Bay Nuclear Power Plant be take as with reference to power station in Ling Ao first phase nuclear power plant, in conjunction with Experience Feedback and nuclear safety Technical Development Requirement, has further improved power plant safety level and technical and economic performance, and overall performance has reached the advanced level of international in-service nuclear power plant of the same type.
Air-pressure fire water supply system is occupied critical role in npp safety safeguards system, designs improperly bring larger potential safety hazard will to whole Nuclear Safety system.Along with first nuclear power engineering adopts the construction mode of " autonomous Design, parts buying ", progress along with science and technology of fire protection, with nuclear power autonomy-oriented design, home-made equipment advance to require ，Dui nuclear power plant air-pressure fire water supply system to carry out technological improvement be very necessary.
The air-pressure fire water supply system design distinguished of power plant designs in common civilian construction air-pressure fire stable-pressure device, and the safe design of nuclear power generating sets fire supply system requires higher than same size gigawatt fired power generating unit, therefore cannot design with reference to existing external fire code, built Daya Gulf ,Ling Ao first phase nuclear power plant is 2 * 900MW level compressed water reactor nuclear power unit at present, its air-pressure fire water supply system is external a complete set of import equipment, the system maintenance management problem running in running and cannot solving.According to country, to the CPR1000 unit of the general requirement ，Ling Australia second phase nuclear power plant of nuclear power plant's autonomy-oriented design, raising home-made equipment rate, be 2 * 1000MW level compressed water reactor nuclear power unit, its air-pressure fire water supply system is selected home equipment.
Full factory of nuclear power plant fire supply system consists of 3 systems, i.e. fire water production system (JPP), fire water distribution system (JPD) and plant area's fire water distribution system (JPU), and wherein fire pump equipment belongs to fire water production system.The function of air-pressure fire pressure-stabilizing water supply system is for to provide water for fire fighting to fire water distribution system (JPD), the fire occurring in order to the nuclear island of putting out a fire to save life and property (NI) or conventional island (CI) or ancillary facility factory building (BOP).
The maximum fire consumption of nuclear power plant occurs in conventional island.The fire water supply of conventional island is from JPP system fire pump, and this fire pump can provide conventional island fire fighting system required maximum water supply volume and pressure, and can automatically open.The maximum fire consumption of conventional island is 293.9L/s, and water supply design pressure is 1.2MPa (from nuclear island elevation of floor level ± 0.00).A set of pneumatic water supply system is set in conventional island.The total measurement (volume) 75m of the auto-pneumatic cylinder of pneumatic water supply system
3, wherein store 25m
3water, 50m
3compressed air; Every small pump flow Q=1.5L/s, lift H=126m; Every air compressor machine air discharge capacity Q=3.88L/s, outlet pressure H=1.3MPa (abs).During Initial Stage of Fire is by pneumatic shuttle supply fire fighting system water, and simultaneously due to fire_fighting pipe network pressure drop, the fire pump that is positioned at pumping station starts automatically, supply conventional island fire fighting system water.
The air-pressure fire water supply system that thermal power plant adopts is relatively simple, flow system flow, pressure and other parameters are lower, auto-pneumatic cylinder volume is less, generally select a complete set of equipment on market, and CPR1000 nuclear power plant fire-fighting initial stage water supply volume is far longer than thermal power plant, air-pressure fire water supply system and auto-pneumatic cylinder are non-standard equipment, and Design and manufacture there is no standard and can follow.
On the other hand, as an auto-pneumatic cylinder is only set, in major overhaul or unit failure process, need long-play fire-fighting main pump to maintain system pressure, auxiliary power consumption and system risk increase, fire-fighting initial stage water supply function also will lose, and safety and the reliability of fire supply system are lowered.
Summary of the invention
The invention provides a kind of air-pressure fire pressure-stabilizing water supply system, it can be applied to CPR1000 nuclear power plant, has very high safety and reliability simultaneously.
The present invention is achieved in that
A kind of air-pressure fire pressure-stabilizing water supply system, it includes auto-pneumatic cylinder, small pump, air compressor, connect water tank and electric-control system, described auto-pneumatic cylinder is non-barrier diaphragm-type pressurized water tank, described auto-pneumatic cylinder includes gas side and water side, described connection water tank includes gas side and water side, the gas side of described auto-pneumatic cylinder, water side are communicated with described gas side, the water side that is connected water tank respectively, the water side of described auto-pneumatic cylinder is communicated with water charging system by described small pump, and the water side of described auto-pneumatic cylinder is communicated with fire water supply pipe network by outlet pipe; The gas side of described auto-pneumatic cylinder is communicated with described air compressor; The liquid level of described connection water tank is synchronizeed and is changed with the liquid level of described auto-pneumatic cylinder and air pressure, described electric-control system is according to the variation of the liquid level line of described connection water tank, control described small pump described auto-pneumatic cylinder is carried out to moisturizing, or/and control described air compressor according to the variation of described connection water tank air pressure, carry out tonifying Qi.
Preferably, described auto-pneumatic cylinder is 2, described small pump is 2, described air compressor is 2, after the first gas side house steward is communicated with the described gas side that is connected water tank, by two the first gas side branch, be communicated with respectively with the gas side of 2 described auto-pneumatic cylinders, the first water side house steward is communicated with the water side of 2 described auto-pneumatic cylinders respectively by two the first water side branch after being communicated with the described water side that is connected water tank; After being connected in parallel, 2 described air compressors are communicated with the second gas side house steward, by 2 the second gas side branch, be communicated with the gas side of 2 described auto-pneumatic cylinders respectively more afterwards, after 2 described small pumps are connected in parallel, be communicated with the second water side house steward, by 2, the second water side branch, be communicated with the outlet pipe of the water side of described auto-pneumatic cylinder respectively more afterwards.Two auto-pneumatic cylinders, small pump and air compressors can be used alternatingly, while avoiding wherein one group of device fails or maintenance, affect the normal operation of air-pressure fire voltage-stabilizing system, and complete after routine test at one group of equipment at every turn, can be switched to fast another group stand-by equipment, equipment is recovered more than pot life shortened 8h.Wherein, described in one group, auto-pneumatic cylinder, described small pump and described air compressor are operation auto-pneumatic cylinder, operation small pump and operation air compressor, and another group is cushion gas pressure tank, standby small pump and stand-by compressor.
Preferably, between the gas side of described auto-pneumatic cylinder and the described gas side that is connected water tank, be provided with breather valve, and described air compressor between be provided with admission valve; Between the water side of described auto-pneumatic cylinder and the described water side that is connected water tank, be provided with water-through valve, and be provided with water intaking valve between described small pump; Wherein, an auto-pneumatic cylinder is standby, breather valve between the gas side of this cushion gas pressure tank and the described gas side that is connected water tank and and described air compressor between admission valve be normally closed, the water-through valve between the water side of this auto-pneumatic cylinder and the described water side that is connected water tank and and this group small pump between water intaking valve be normally closed.
Preferably, described connection water tank is provided with and connects high water tank meter, it can show the liquid level of described connection water tank on the spot, in described connection water tank, be provided with high water level liquid-level switch and low water stage liquid-level switch, described the first gas side house steward and described the first water side house steward are communicated with, and be connected with a plurality of pressure switches and pressure meter, be connected with drainage system more afterwards, the gas side of described connection high water tank meter, water side is connected with the two ends of described tube connector respectively, during liquid level that the liquid level in described connection water tank is set lower than this low water stage liquid-level switch, described operation small pump work, the liquid level that liquid level in described connection water tank is set higher than this low water stage liquid-level switch, and the liquid level that the liquid level in described connection water tank is set lower than this high water level liquid-level switch, during pressure that the pressure that simultaneously connects water tank gas side starts lower than the air compressor of setting, described operation small pump work, otherwise, during water level that the liquid level in described connection water tank is set higher than this high water level liquid-level switch, described operation small pump quits work.
Preferably, in described air-pressure fire pressure-stabilizing water supply system, described pressure switch is 6, and the force value of these 6 pressure switches is set as respectively moving air compressor starting pressure, stand-by compressor and stops pressure, ultralow pressure alarm pressure, stand-by compressor starting pressure, operation air compressor and stop pressure and super-pressure alarm pressure.
Preferably, the outlet pipe of 2 described small pumps is connected with respectively small pump pressure switch, when the valve pressure that between transfer period, discharge pressure is set lower than this small pump pressure switch, operation small pump starts, and has further strengthened the reliability of air-pressure fire pressure-stabilizing water supply system.
Preferably, in order directly to show the liquid level of described auto-pneumatic cylinder, be convenient to the operating condition of Real Time Observation auto-pneumatic cylinder, 2 described auto-pneumatic cylinders are respectively equipped with auto-pneumatic cylinder content gauge, the water side of described auto-pneumatic cylinder content gauge, gas side respectively with the water side of described auto-pneumatic cylinder, gas side is communicated with, the water side of described auto-pneumatic cylinder content gauge is provided with content gauge discharging valve, and the water side of described auto-pneumatic cylinder content gauge and described auto-pneumatic cylinder, the junction of gas side is respectively equipped with content gauge maintenance isolating valve, the water side of described auto-pneumatic cylinder content gauge is provided with content gauge liquid-level switch, when liquid level that the liquid level of described auto-pneumatic cylinder is set lower than this content gauge liquid-level switch, electric-control system sends alarm signal.
Emptying by accident in order to prevent the water in described auto-pneumatic cylinder, the outlet pipe place of described auto-pneumatic cylinder bottom is provided with float-ball type gas stoper, and described float-ball type gas stoper carries out mechanical seal to described outlet pipe.
Preferably, described the second gas side house steward is connected with quick air admission system by source of the gas fast repairing air valve, and described the second gas side house steward is connected with drainage system by air hose discharging valve, and the outlet pipe of described auto-pneumatic cylinder is connected with drainage system by discharging valve.
Air-pressure fire pressure-stabilizing water supply system of the present invention compared with prior art, has following beneficial effect:
The present invention selects the non-barrier diaphragm-type pressurized water tank that volume is larger, and increase a cushion gas pressure tank, and by connecting water tank, two described auto-pneumatic cylinders are connected, by connecting the water level of water tank and the variation of pressure, control the action of small pump and air compressor, can start according to two small pumps of actual conditions or two air compressors simultaneously, or start separately, not only can make rational use of resources, and can guarantee safety, reliability and the stability of this air-pressure fire pressure-stabilizing water supply system; This air-pressure fire pressure-stabilizing water supply system not only can be applied to thermoelectricity fire supply system, and it is short start-up time to be applied to fire pump, and fire-fighting initial stage water supply volume is large, and pressure of supply water is high, and security of system requires the fire supply system of strict CPR1000 nuclear power plant.
Accompanying drawing explanation
Fig. 1 is the structural representation of air-pressure fire pressure-stabilizing water supply system of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated:
Air-pressure fire pressure-stabilizing water supply system of the present invention, include auto-pneumatic cylinder, small pump, air compressor, connect water tank and electric-control system (scheming not shown), described auto-pneumatic cylinder is non-barrier diaphragm-type pressurized water tank, described auto-pneumatic cylinder includes gas side and water side, described connection water tank 4 includes gas side and water side, the gas side of described auto-pneumatic cylinder, water side respectively with the described gas side that is connected water tank 4, water side is communicated with, the water side of described auto-pneumatic cylinder is communicated with water charging system SEP by described small pump, the water side of described auto-pneumatic cylinder is communicated with fire water supply pipe network JPD by outlet pipe, the gas side of described auto-pneumatic cylinder is communicated with described air compressor, the liquid level line of described connection water tank 4 is synchronizeed and is changed with the liquid level of described auto-pneumatic cylinder and air pressure, described electric-control system changes according to the liquid level of described connection water tank 4, control described small pump described auto-pneumatic cylinder is carried out to moisturizing, or/and control described air compressor according to the variation of described connection water tank 4 air pressure, carry out tonifying Qi.
As shown in Figure 1, it has illustrated the structural representation of air-pressure fire pressure-stabilized water-supplying device of the present invention, preferably, in order to avoid 1 maintenance of described auto-pneumatic cylinder time, do not affect the normal operation of described air-pressure fire pressure-stabilizing water supply system, improve its safety and reliability, the present invention includes 2 auto-pneumatic cylinder 1a, 1b, 2 small pump 2a, 1b, 2 air compressor 3a, 3b, after the first gas side house steward 51 is communicated with the described gas side that is connected water tank 4, by two the first gas side branch 52a, 52b respectively with 2 described auto-pneumatic cylinder 1a, the gas side of 1b is communicated with, after the first water side house steward 53 is communicated with the described water side that is connected water tank 4, by two the first water side branch 54a, 54b respectively with 2 described auto-pneumatic cylinder 1a, the water side of 1b is communicated with, after being connected in parallel, 2 described air compressor 3a, 3b are communicated with the second gas side house steward 55, logical 2 the second gas side branch 56a, 56b are communicated with the gas side of 2 described auto-pneumatic cylinder 1a, 1b respectively more afterwards, after 2 described small pump 2a, 2b are connected in parallel, be communicated with the second water side house steward 57, by 2 described the second water side branch 58a, 58b, be communicated with the outlet pipe of the water side of described auto-pneumatic cylinder 1a, 1b respectively more afterwards.Wherein, described in one group, auto-pneumatic cylinder, described small pump and described air compressor are operation auto-pneumatic cylinder, operation small pump and operation air compressor, and another group is cushion gas pressure tank, standby small pump and stand-by compressor.
Described connection water tank 4 is provided with and connects high water tank meter 003LN, in described connection water tank 4, be provided with high water level liquid-level switch 202SN and low water stage liquid-level switch 201SN, described the first gas side house steward 51 and described the first water side house steward 52 are communicated with by tube connector 63, and be connected with a plurality of pressure switches and pressure meter 001LP, be connected with drainage system SEO more afterwards, gas side, the water side of described connection high water tank meter 003LN are connected with the two ends of described tube connector 63 respectively.Described small pump 2a and described small pump 2b, it is standby selecting described small pump 2b.
Introduce in detail start-up time and the off-air time of described operation small pump and described standby small pump below, the preferred described small pump 2a of the present embodiment is operation small pump, and described small pump 2b is standby small pump.During liquid level that the liquid level in described connection water tank 4 is set lower than this low water stage liquid-level switch 201SN, described operation small pump 2a work, the liquid level that liquid level in described connection water tank 4 is set higher than this low water stage liquid-level switch 201SN, and the liquid level that the liquid level in described connection water tank 4 is set lower than this high water level liquid-level switch 202SN, during pressure that the pressure that simultaneously connects water tank 4 gas sides starts lower than the air compressor of setting, described operation small pump 2a work, otherwise, during water level that the liquid level in described connection water tank 4 is set higher than this high water level liquid-level switch 202SN, described operation small pump 2a quits work, when described operation small pump 2a work, if the liquid level that the liquid level in described connection water tank 4 is set lower than this low water stage liquid-level switch 201SN again, or the liquid level in described connection water tank 4 is higher than the liquid level of this low water stage liquid-level switch 201SN setting, and the liquid level that the liquid level in described connection water tank 4 is set lower than this high water level liquid-level switch 202SN, during pressure that the pressure that simultaneously connects water tank 4 gas sides starts lower than the air compressor of setting, described standby small pump 2b work, now described operation small pump 2a and described standby small pump 2b work simultaneously.If described operation small pump 2a or described standby small pump 2b break down, the pressure of the small pump pressure switch 208SP that the small pump pressure switch 207SP being connected with described operation small pump 2a or described standby small pump 2b connect is during lower than minimum fire-fighting work pressure 1.25MPa (abs), described standby small pump 2b or described operation small pump 2a put into operation, and send alarm signal.
Preferably, the gas side of described auto-pneumatic cylinder 1a, 1b with described be connected between water tank 4, be provided with breather valve 304VA, 334VA, and described air compressor 3a, 3b between be provided with admission valve 310VA, 335VA; Between the water side of described auto-pneumatic cylinder 1a, 1b and the described water side that is connected water tank 4, be provided with water-through valve 308VT, 338VT, and described small pump 2a, 3b between be provided with water intaking valve 331VT, 333VT; Wherein, described auto-pneumatic cylinder 1b is standby, breather valve 334VA between the gas side of this auto-pneumatic cylinder 1b and the described gas side that is connected water tank 4 and and air compressor between admission valve 335VA be normally closed, the water side of this auto-pneumatic cylinder 1b with described be connected water-through valve 338VT between water tank 4 water sides and and this group small pump between water intaking valve 333VT be normally closed.When auto-pneumatic cylinder 1a maintenance, by operator outlet valve 331VT, the 333VT to auto-pneumatic cylinder respectively, water-through valve 308VT, 338VT, breather valve 304VA, 334VA, admission valve 310VA, 335VA manual switchover, and open small pump main water outlet pipe valve 318VT and directly start small pump and supply water to this air-pressure fire pressure-stabilizing water supply system.
During described air-pressure fire pressure-stabilizing water supply system operation, regularly carry out the exchange at throwing, cushion gas pressure tank, make the frequent combat ready/readiness of cushion gas pressure tank, if break down at throwing auto-pneumatic cylinder, by operating personnel's manual-lock throwing auto-pneumatic cylinder outlet valve (331VT or 333VT), open cushion gas pressure tank outlet valve (333VT or 331VT).
For the ease of controlling described small pump 2a, 2b, described air compressor 3a, 3b, the pressure switch of described air-pressure fire pressure-stabilizing water supply system includes 6 pressure switches, it is respectively the pressure switch 202SP that is set as moving air compressor starting pressure, stand-by compressor stops the pressure switch 203SP of pressure, the pressure switch 209SP of ultralow pressure alarm pressure, the pressure switch 204SP of stand-by compressor starting pressure, operation air compressor stops the pressure switch 201SP of pressure and the pressure switch 003SP of super-pressure alarm pressure (1.275MPa), wherein, each pressure switch is connected with needle valve between pipeline, this needle valve is instrument maintenance isolating valve, its connected mode has belonged to prior art, the present invention does not repeat them here.In the present embodiment, fire fighting supply low pressure limit meets CPR1000 conventional island urban conservation area least favorable point pressure, is 0.865MPa; Ultralow pressure alarm pressure is 1.25MPa; Super-pressure alarm pressure is 1.275MPa.
Introduce in detail start-up time and the off-air time of described operation small pump and described standby small pump below, the preferred described air compressor 3a of the present embodiment is operation air compressor, and described air compressor 3b is stand-by compressor 3b.During pressure (being that described auto-pneumatic cylinder 1a internal pressure is lower than auto-pneumatic cylinder minimal pressure) that the liquid level that the liquid level in described connection water tank 4 is set higher than this high water level liquid-level switch 202SN and pressure are set lower than described pressure switch 202SP, described operation air compressor 3a starts; When pressure (being that described auto-pneumatic cylinder 1a internal pressure is higher than auto-pneumatic cylinder maximal pressure) that described connection water tank 4 internal pressures are set higher than described pressure switch 201SP, described operation air compressor 3a quits work; If when described operation air compressor 3a work, if the pressure that the liquid level that the liquid level in described connection water tank 4 is set higher than this high water level liquid-level switch 202SN again and pressure are set lower than described pressure switch 202SP, described stand-by compressor 3b starts; If during described air compressor 3a operation, the pressure of described auto-pneumatic cylinder 1a is during lower than stand-by compressor starting pressure, and stand-by compressor 3b starts, and electric-control system also sends alarm signal; If described auto-pneumatic cylinder 1a internal pressure reaches stand-by compressor while stopping pressure, described stand-by compressor 3b is out of service; When described auto-pneumatic cylinder 1a internal pressure reaches super-pressure alarm pressure or drops to ultralow pressure alarm pressure, electric-control system also can send alarm signal.
In order to check intuitively the liquid level of described auto-pneumatic cylinder 1a, 1b, described auto-pneumatic cylinder 1a, 1b are respectively equipped with auto-pneumatic cylinder content gauge 001LN, 002LN, and described auto-pneumatic cylinder content gauge 001LN, 002LN can show the water level of connected auto-pneumatic cylinder 1a, 1b on the spot.Wherein, the water side of described auto-pneumatic cylinder content gauge 001LN, gas side respectively with the water side of described auto-pneumatic cylinder 1a, gas side is communicated with, and the gas side of described air pressure tank water-level gauge 001LN is provided with pressure switch 001SP and pressure meter 003LP, the gas side of described air pressure tank water-level gauge 002LN is provided with pressure switch 002SP and pressure meter 002LP, the water side of described auto-pneumatic cylinder content gauge 001LN is provided with content gauge discharging valve 383VT, the water side of described auto-pneumatic cylinder content gauge 001LN and described auto-pneumatic cylinder 1a, the junction of gas side is respectively equipped with content gauge maintenance isolating valve 381VT, 381VA, the water side of described auto-pneumatic cylinder content gauge 001LN is provided with content gauge liquid-level switch 001SN, when liquid level that the liquid level of described auto-pneumatic cylinder 1a is set lower than this content gauge liquid-level switch 001SN, electric-control system sends alarm signal, in like manner, the two ends of described auto-pneumatic cylinder content gauge 002LN respectively with the water side of described auto-pneumatic cylinder 1a, gas side is communicated with, and the water side of described auto-pneumatic cylinder content gauge 002LN is provided with content gauge discharging valve 384VT, the water side of described auto-pneumatic cylinder content gauge 002LN and described auto-pneumatic cylinder 1b, the junction of gas side is respectively equipped with content gauge maintenance isolating valve 382VT, 382VA, the water side of described auto-pneumatic cylinder content gauge 002LN is provided with content gauge liquid-level switch 002SN, when liquid level that the liquid level of described auto-pneumatic cylinder 1b is set lower than this content gauge liquid-level switch 002SN, electric-control system sends alarm signal.
Continue as shown in Figure 1, the outlet pipe place of described auto-pneumatic cylinder 1a bottom is provided with float-ball type gas stoper 12,12 pairs of described outlet pipes of described float-ball type gas stoper carry out mechanical seal, to avoid auto-pneumatic cylinder 1a unexpected emptying, air enters feedwater piping, when in auto-pneumatic cylinder 1a, water level drops to lowest water level (auto-pneumatic cylinder end socket bottom), described float-ball type gas stoper 12 is closed the outlet of described auto-pneumatic cylinder 1a automatically; In like manner, the bottom of described auto-pneumatic cylinder 1b is also provided with float-ball type gas stoper 13.In addition, described auto-pneumatic cylinder 1a also should be equiped with safety valve, pressure meter, drain valve and airtight manhole, on water inlet pipe and air inlet pipeline, flap valve should be set, and the setting of those devices has belonged to prior art, and the present invention does not repeat them here.
In order further to strengthen the reliability of described air-pressure fire pressure-stabilizing water supply system, described the second gas side house steward 55 is connected with quick air admission system SAT by source of the gas fast repairing air valve 313VA, described the second gas side house steward is connected with drainage system SEO by air hose discharging valve 307VA, and the outlet pipe of described auto-pneumatic cylinder 1a, 1b is connected with drainage system SEO by discharging valve 301VT.Wherein, under described air-pressure fire voltage-stabilizing system normal operation, described fast repairing air valve 313VA, air hose discharging valve 307VA and outlet pipe are normally closed by discharging valve 301VT.
To introduce in detail the selection of the parameter specification of auto-pneumatic cylinder, small pump and air compressor below, the present embodiment is preferred embodiment, and the scope with each parameter specification does not limit the scope of the invention:
In order to adapt to the needs of nuclear power fire-fighting, the total measurement (volume) V of described auto-pneumatic cylinder is 75m
3, water capacity V
waterfor 25m
3, air volume V
gasfor 50m
3, fire fighting system operating pressure P, 1.3MPa (abs), Fire Control System Design pressure P c, 1.6MPa, body material is 16MnR hot rolled alloy steel, and in tank, pitching is anticorrosion, and tank is coated with epoxy resin outward.
The nominal diameter DN350mm of the outlet pipe of described auto-pneumatic cylinder, tubing is inside and outside hot galvanized steel pipe.
The design metered flow of described small pump should not be less than normal leakage amount or the automatically actuated flow of fire water waterline network JPD of fire water waterline network JPD, and should not be less than 1L/s; Small pump design rated pressure is preferably fire-fighting main pump stirring pressure and adds 0.02～0.07MPa.
The export amount constant-pressure of described air compressor should be definite by fire water waterline network JPD pressurizer pressure, and continuous operating time should not surpass 8h.
Preferably 2 described auto-pneumatic cylinder 1a, 1b are arranged on 2 places between the steam turbine factory building being arranged in juxtaposition, and the stable-pressure devices such as small pump 2a, 2b, air compressor 3a, 3b, switch board are arranged in steam turbine factory building.When considering when antifreeze, auto-pneumatic cylinder and stable-pressure device can be arranged in the penthouse of steam turbine factory building independently, and room arranges heating and ventilation, and pipeline should be adopted an effective measure and be prevented from freezing.The tank deck of pneumatic installation water supply to the distance of building structure minimum point must not be less than 1.0m, between tank and tank and the clear distance of tank skin and metope must not be less than 0.7m.
These are only specific embodiments of the invention, with this, do not limit protection scope of the present invention; Not violating any replacement and the improvement of doing on the basis of the present invention's design, all belong to protection scope of the present invention.
Claims (9)
1. an air-pressure fire pressure-stabilizing water supply system, it is characterized in that, it includes auto-pneumatic cylinder, small pump, air compressor, connect water tank and electric-control system, described auto-pneumatic cylinder is non-barrier diaphragm-type pressurized water tank, described auto-pneumatic cylinder includes gas side and water side, described connection water tank includes gas side and water side, the gas side of described auto-pneumatic cylinder, water side are communicated with described gas side, the water side that is connected water tank respectively, and the water side of described auto-pneumatic cylinder is communicated with water charging system by described small pump, and the water side of described auto-pneumatic cylinder is communicated with fire water supply pipe network by outlet pipe; The gas side of described auto-pneumatic cylinder is communicated with described air compressor; The liquid level of described connection water tank is synchronizeed and is changed with the liquid level of described auto-pneumatic cylinder and air pressure, described electric-control system is according to the variation of the liquid level of described connection water tank, control described small pump described auto-pneumatic cylinder is carried out to moisturizing, or/and control described air compressor according to the variation of described connection water tank air pressure, carry out tonifying Qi.
2. air-pressure fire pressure-stabilizing water supply system as claimed in claim 1, it is characterized in that, described auto-pneumatic cylinder is 2, described small pump is 2, described air compressor is 2, and the first gas side house steward is communicated with the gas side of 2 described auto-pneumatic cylinders respectively by two the first gas side branch after being communicated with the described gas side that is connected water tank, the first water side house steward is communicated with the water side of 2 described auto-pneumatic cylinders respectively by two the first water side branch after being communicated with the described water side that is connected water tank; After being connected in parallel, 2 described air compressors are communicated with the second gas side house steward, by 2 the second gas side branch, be communicated with the gas side of 2 described auto-pneumatic cylinders respectively more afterwards, after 2 described small pumps are connected in parallel, be communicated with the second water side house steward, by 2 the second water side branch, be communicated with the outlet pipe of the water side of described auto-pneumatic cylinder respectively more afterwards; Wherein, described in one group, auto-pneumatic cylinder, described small pump and described air compressor are operation auto-pneumatic cylinder, operation small pump and operation air compressor, and another group is cushion gas pressure tank, standby small pump and stand-by compressor.
3. air-pressure fire pressure-stabilizing water supply system as claimed in claim 2, is characterized in that, between the gas side of described auto-pneumatic cylinder and the described gas side that is connected water tank, be provided with breather valve, and described air compressor between be provided with admission valve; Between the water side of described auto-pneumatic cylinder and the described water side that is connected water tank, be provided with water-through valve, and be provided with water intaking valve between described small pump; Wherein, an auto-pneumatic cylinder is standby, breather valve between the gas side of this cushion gas pressure tank and the described gas side that is connected water tank and and described air compressor between admission valve be normally closed, the water-through valve between the water side of this auto-pneumatic cylinder and the described water side that is connected water tank and and this group small pump between water intaking valve be normally closed.
4. air-pressure fire pressure-stabilizing water supply system as claimed in claim 2, it is characterized in that, described connection water tank is provided with and connects high water tank meter, in described connection water tank, be provided with high water level liquid-level switch and low water stage liquid-level switch, described the first gas side house steward and described the first water side house steward are communicated with by tube connector, and be connected with a plurality of pressure switches and pressure meter, be connected with drainage system more afterwards, the gas side of described connection high water tank meter, water side is connected with the two ends of described tube connector respectively, during liquid level that the liquid level in described connection water tank is set lower than this low water stage liquid-level switch, described operation small pump work, the liquid level that liquid level in described connection water tank is set higher than this low water stage liquid-level switch, and the liquid level that the liquid level in described connection water tank is set lower than this high water level liquid-level switch, during pressure that the pressure that simultaneously connects water tank gas side starts lower than the air compressor of setting, described operation small pump work, otherwise, during water level that the liquid level in described connection water tank is set higher than this high water level liquid-level switch, described operation small pump quits work.
5. air-pressure fire pressure-stabilizing water supply system as claimed in claim 4, it is characterized in that, in described air-pressure fire pressure-stabilizing water supply system, described pressure switch is 6, and the force value of these 6 described pressure switches is set as respectively moving air compressor starting pressure, stand-by compressor and stops pressure, ultralow pressure alarm pressure, stand-by compressor starting pressure, operation air compressor and stop pressure and super-pressure alarm pressure.
6. air-pressure fire pressure-stabilizing water supply system as claimed in claim 4, it is characterized in that, the outlet pipe of 2 described small pumps is connected with respectively small pump pressure switch, and when the valve pressure that between transfer period, discharge pressure is set lower than this small pump pressure switch, operation small pump starts.
7. air-pressure fire pressure-stabilizing water supply system as claimed in claim 2, it is characterized in that, 2 described auto-pneumatic cylinders are respectively equipped with auto-pneumatic cylinder content gauge, the water side of described auto-pneumatic cylinder content gauge, gas side respectively with the water side of described auto-pneumatic cylinder, gas side is communicated with, the water side of described auto-pneumatic cylinder content gauge is provided with content gauge discharging valve, and the water side of described auto-pneumatic cylinder content gauge and described auto-pneumatic cylinder, the junction of gas side is respectively equipped with content gauge maintenance isolating valve, the water side of described auto-pneumatic cylinder content gauge is provided with content gauge liquid-level switch, when liquid level that the liquid level of described auto-pneumatic cylinder is set lower than this content gauge liquid-level switch, electric-control system sends alarm signal.
8. air-pressure fire pressure-stabilizing water supply system as claimed in claim 1, is characterized in that, the outlet pipe place of described auto-pneumatic cylinder bottom is provided with float-ball type gas stoper, and described float-ball type gas stoper carries out mechanical seal to described outlet pipe.
9. air-pressure fire pressure-stabilizing water supply system as claimed in claim 2, it is characterized in that, described the second gas side house steward is connected with air admission system by source of the gas fast repairing air valve, described the second gas side house steward is connected with drainage system by air hose discharging valve, and the outlet pipe of described auto-pneumatic cylinder is connected with drainage system by discharging valve.
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| CN201110167066.6A CN102312467B (en) | 2011-06-21 | 2011-06-21 | Stable air-pressure fire water supply system |
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| CN103007474A (en) * | 2013-01-16 | 2013-04-03 | 青岛安福尔车业有限公司 | Air compressing power type double water tank interchanging fire extinguishing device |
| CN110442160B (en) * | 2019-08-12 | 2022-09-02 | 常州博瑞电力自动化设备有限公司 | Air pressure stabilizing device for closed type circulating cooling system |
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