CN114432631A - Automatic water spraying fire extinguishing system and fire extinguishing method for cooling tower - Google Patents
Automatic water spraying fire extinguishing system and fire extinguishing method for cooling tower Download PDFInfo
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- CN114432631A CN114432631A CN202210027479.2A CN202210027479A CN114432631A CN 114432631 A CN114432631 A CN 114432631A CN 202210027479 A CN202210027479 A CN 202210027479A CN 114432631 A CN114432631 A CN 114432631A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/28—Accessories for delivery devices, e.g. supports
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
- F28F25/04—Distributing or accumulator troughs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
- F28F25/06—Spray nozzles or spray pipes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Health & Medical Sciences (AREA)
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- Emergency Management (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention discloses an automatic water spraying fire extinguishing system and a fire extinguishing method for a cooling tower.A pressure stabilizing device is arranged on a water outlet pipeline of a water tank, a check valve, a first fire pump, a second fire pump, a first pressure switch and a rain alarm valve group are arranged on the water outlet pipeline of the cooling tower, and an open type spray head, a fire detector and a closed type spray head are arranged in the cooling tower; responding to a fire signal, sending an instruction to the electromagnetic valve by the control box, blasting the closed spray head by heating to spray water, and opening the deluge valve; in response to the first pressure switch fire signal, the control box sends instructions to the electric valve, the first fire pump, the second fire pump, the first pressure stabilizing pump and the second pressure stabilizing pump to enable the open type spray head to spray water at a preset pressure. This system independent setting is applicable to newly-built and reconstruction project, and the construction flexibility is high, and fire water tank volume is little, and fire control hydroenergy cyclic utilization.
Description
Technical Field
The invention relates to the technical field of cooling tower fire prevention, in particular to an automatic water spraying fire extinguishing system and an automatic water spraying fire extinguishing method for a cooling tower.
Background
The mechanical ventilation cooling tower is a heat exchange hot standby widely used in civil and industrial fields. The cooling tower runs for a long time, the motor runs overheat, and a fire disaster can happen. The side plate material of the cooling tower is usually fiber reinforced composite FRP, the internal filler and the fan deck are usually polyvinyl chloride, and the sealing material for sealing the assembly gap of the cooling tower is flammable, so that fire can be caused by fire operation during maintenance. The cooling tower fire spread rapidly, is difficult to extinguish in the first time, and can cause great threat to life and production safety.
The current architectural design fire protection regulations in China do not require that a cooling tower is provided with a special, rapid and effective fire-fighting device. At present, no independent special cooling tower automatic water spraying fire extinguishing system exists. For high-grade civil buildings and important industrial enterprises, in order to avoid the cooling tower from generating fire, in the project design, a spray head is arranged in the cooling tower, and a branch pipe is led out from an automatic water spraying fire extinguishing system arranged at other positions and is connected to the spray head in the cooling tower.
The existing automatic water spraying fire extinguishing system comprises the following components and working principles: set up fire-fighting water pond and fire pump in low level water pump room, set up high-order fire water tank and voltage regulator device between roofing water tank, set up the shower nozzle in the region that fire control standard required. The roof cooling tower is internally provided with a spray head which is connected with an automatic water spraying fire extinguishing system. In case of fire, the fire pump sucks water from the fire pool and sprays the water out of the spray head.
The prior technical scheme has the following defects:
1. for newly-built projects, branch pipes are led out from an automatic water spray fire extinguishing system and connected to cooling tower nozzles, but the cooling tower is usually arranged at a position far away from or higher than other areas where the nozzles are arranged, so that the length of a laid pipeline can be increased, and the lift of a fire pump can be increased; on the other hand, the water spraying strength of the open type spray head of the cooling tower is higher than that of other areas, so that the flow of the fire pump is increased, the water storage capacity of the fire pool is increased, and the investment and operation and maintenance cost are increased.
2. For the established project, if no automatic water-spraying fire-extinguishing system exists in the civil building or the factory, because a fire pool is newly arranged, a fire-fighting high-level water tank, a fire-fighting pressure stabilizing device and the like are newly arranged on the roof, the setting requirement of the system is difficult to meet due to the existing conditions on the site, and the new arrangement of the automatic water-spraying fire-extinguishing system of the cooling tower is difficult to realize.
3. For the established project, a spray head is newly arranged in a cooling tower, and the existing automatic water spraying fire extinguishing system cannot be utilized because the flow, the lift, the volume of a fire pool and the like of a fire pump in the existing fire extinguishing system cannot meet the fire fighting requirements of the spray head of the cooling tower.
4. The spray intensity of the spray head in the cooling tower is higher, the protection area is larger, a thousand tons of fire pool needs to be arranged, the occupied area is large, and the investment is high.
The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is well known to those of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide an automatic water spraying fire extinguishing system and an automatic water spraying fire extinguishing method for a cooling tower, which are suitable for new construction and reconstruction projects, have high construction flexibility, small volume of a fire-fighting water tank, cyclic utilization of fire-fighting water energy, low investment reconstruction and operation and maintenance cost and are independently arranged.
In order to achieve the above purpose, the invention provides the following technical scheme:
the automatic water spraying fire extinguishing system for the cooling tower comprises:
the cooling tower comprises a water collecting tray, the water collecting tray is provided with a first water outlet pipeline connected with the power station and a fire-fighting water inlet connected with a fire-fighting water inlet pipeline,
the interception device is arranged on the side wall of the fire-fighting water inlet,
an electric valve arranged on the first water outlet pipeline to switch on and off the first water outlet pipeline,
a check valve provided at the fire fighting water intake pipe,
first and second fire pumps arranged in parallel on the fire inlet pipe,
a first pressure switch arranged on the pipeline after the outlets of the first and second fire fighting pumps are connected in parallel,
the deluge alarm valve group, it is set up in said first and second fire pump outlet pipeline after connecting in parallel, it includes the first signal valve, deluge valve, second signal valve connected sequentially on the vertical pipeline; the lower part of the valve body of the deluge valve is connected with a branch pipe which is provided with an electromagnetic valve,
a branch pipe which is connected with the rain alarm valve group and is connected with the cooling tower,
an open type spray head which is arranged in the cooling tower and is connected with the branch pipe,
a transmission pipe which is connected with the lower part connecting branch pipe of the valve body of the deluge valve and is connected with the cooling tower,
a closed spray head arranged in the cooling tower and connected with the transmission pipe,
a fire detector disposed within the cooling tower to generate a fire signal,
the bottom of the water tank is provided with a second water outlet pipeline connected with the fire-fighting water inlet pipeline,
a connecting pipe which is connected with the second water outlet pipeline and is connected with the pipelines after the outlets of the first and second fire fighting pumps are connected in parallel,
the pressure stabilizing device is arranged on the connecting pipe and comprises a first pressure stabilizing pump, a second pressure switch, a third pressure switch and a pneumatic water tank which are sequentially arranged on the connecting pipe in parallel,
and the control box is connected with the electric valve, the first fire pump, the second fire pump, the first signal valve, the second signal valve, the electromagnetic valve, the fire detector, the first pressure stabilizing pump, the second pressure stabilizing pump, the first pressure switch, the second pressure switch and the third pressure switch.
In the automatic water spraying fire extinguishing system for the cooling tower, the control box sends an instruction to the electromagnetic valve in response to a fire signal of a fire detector in the cooling tower, the closed spray head is heated to explode and spray water, the transmission pipe is decompressed, the deluge valve is opened, and the control box sends an instruction to the electric valve, the first fire pump and the second fire pump in response to a signal of the first pressure switch, so that the open spray head sprays water at a preset pressure.
In the automatic water spraying fire extinguishing system for the cooling tower, the intercepting device can be detached and connected with the side wall of the water collecting tray of the cooling tower.
In the automatic water spraying fire extinguishing system for the cooling tower, the intercepting device comprises covers with inner and outer layers of grids, the distance between the outer layer grids is larger than that between the inner layer grids, and the two covers are arranged at intervals.
In the automatic water spraying fire extinguishing system for the cooling tower, the flow rates of the first fire pump and the second fire pump are related to the water spraying strength and the action area of the open type spray head, and the lift of the first fire pump and the second fire pump is related to the working pressure of the open type spray head which is the most unfavorable point of the fire pump and the head loss of a pipeline.
In the automatic water spraying fire extinguishing system of the cooling tower, the working pressure of the open type spray head at the worst point is 0.1-0.3 MPa.
In the automatic water spraying fire extinguishing system for the cooling tower, the water spraying intensity of the open type spray head is 10-30L/min m 2.
In the automatic water spraying fire extinguishing system for the cooling tower, the action area of the single cooling tower is calculated according to the area of 1 cooling tower, and the area of at least 2 cooling towers is calculated for a plurality of cooling towers which are assembled and combined.
In the automatic water spraying fire extinguishing system for the cooling tower, the continuous water spraying time is 0.5-3 h.
In the automatic water spraying fire extinguishing system of the cooling tower, the working pressure of the closed spray head at the worst point is 0.1 MPa.
In the automatic water spraying fire extinguishing system for the cooling tower, the water level of the water tank cannot be lower than the water level of the water collecting tray.
In the automatic water spraying fire extinguishing system of the cooling tower, the water tank stores the fire-fighting water consumption for ensuring the normal operation of the system.
The fire extinguishing method based on the automatic water spraying fire extinguishing system for the cooling tower comprises the following steps,
step S1: when a fire detector in the cooling tower detects the occurrence of a fire, a fire signal is transmitted to the control box, the electromagnetic valve is opened by the signal, the closed spray head is heated and exploded to spray water, the transmission pipe is decompressed,
step S2: the pressure relief cavity in the valve body of the deluge valve is used for relieving pressure, the deluge valve is opened,
step S3: the first pressure switch sends a signal to the control box,
step S4: responding to a fire signal, the control box sends an instruction, closes the electric valve, the first pressure stabilizing pump and the second pressure stabilizing pump, and starts the first fire pump or the second fire pump; the first or the second fire pump absorbs water from the water tank and/or the water collecting tray of the cooling tower, sprays out from the open type spray head through the branch pipe and falls into the water collecting tray of the cooling tower,
step S5: after the fire is extinguished, the first fire pump or the second fire pump is shut down remotely or on site.
In the method, when the pressure in the water outlet pipeline of the pressure stabilizing pump reaches a second preset pressure value, the second pressure switch sends a signal to the control box, the pressure stabilizing pump is started by the signal to increase the pressure in the pipeline behind the pressure stabilizing pump, when the pressure reaches a third preset pressure value, the third pressure switch sends a signal to the control box, and the pressure stabilizing pump is turned off by the signal.
In the technical scheme, the automatic water spraying fire extinguishing system for the cooling tower provided by the invention has the following beneficial effects: the automatic water spraying fire extinguishing system of the cooling tower is independently arranged, other fire extinguishing systems are not needed, and the problems that the equipment investment and the operation and maintenance cost of the system can be increased in the existing new project, and the spray head of the cooling tower is unconditionally arranged in the established project are solved. The automatic water spraying fire extinguishing system of the cooling tower is suitable for newly-built and reconstructed projects. For a new project, the system can reduce equipment investment and operation and maintenance cost. For a cooling tower which is already put into operation, only a small amount of equipment and pipelines are added. The invention uses a small amount of water in the water tank as a water source, and can be recycled for fire extinguishing without arranging a thousand tons of fire pool and connecting external water source for water supply. The system of the invention is started by adopting two modes of a fire detector and a closed spray head, and the reliability is greatly improved. The system has the advantages of simple structure, reliable operation, full-automatic operation, small occupied area, low investment and low operation cost.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
Fig. 1 is a schematic structural diagram of an automatic water spray fire extinguishing system of a cooling tower according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
Referring to fig. 1, in one embodiment, a cooling tower sprinkler system of the present invention comprises,
the cooling tower 1 comprises a water collecting tray 2, the water collecting tray 2 is provided with a first water outlet pipeline 3 connected with a power station and a fire-fighting water inlet 6 connected with a fire-fighting water inlet pipeline 8,
an interception device 7 arranged on the side wall of the fire-fighting water inlet 6,
an electric valve 4 arranged in the first water outlet pipe 3 for switching on and off the first water outlet pipe 3,
a check valve 9 provided in the fire-fighting water intake pipe 8,
first and second fire pumps 10 and 11, which are provided in parallel on the fire inlet pipe 8,
a first pressure switch 12 arranged on the pipeline after the outlets of the first fire pump 10 and the second fire pump 11 are connected in parallel,
the deluge alarm valve group 13, it sets up on the pipeline after said first and second fire pump 10 and 11 outlet port connect in parallel, it includes the first signal valve 13-1, deluge valve 13-2, second signal valve 13-3 connected sequentially on the vertical pipeline; the lower part of the valve body of the deluge valve 13-2 is connected with a branch pipe 13-4 which is provided with an electromagnetic valve 13-5,
a branch pipe 14 which is connected with the rain alarm valve group 13 and is connected with the cooling tower 1,
an open-type spray head 15 which is arranged in the cooling tower 1 and is connected with the branch pipe 14,
a transmission pipe 16 which is connected with the lower part connecting branch pipe 13-4 of the valve body of the deluge valve 13-2 and is connected with the cooling tower 1,
a closed spray head 17 which is arranged in the cooling tower 1 and is connected with the transmission pipe 16,
a fire detector 18 provided in the cooling tower 1 to generate a fire signal,
a water tank 19, the bottom of which is provided with a second water outlet pipe 20 connected with the fire-fighting water inlet pipe 8,
a connection pipe 21 connected to the second water outlet pipe 20 and connected to the pipes connected to the outlets of the first and second fire pumps 10 and 11 in parallel,
the pressure stabilizing device 22 is arranged on the connecting pipe 21 and comprises a first pressure stabilizing pump 22-1, a second pressure stabilizing pump 22-2, a second pressure switch 22-3, a third pressure switch 22-4 and a pneumatic water tank 22-5 which are sequentially arranged on the connecting pipe 21 in parallel,
and the control box 5 is connected with the electric valve 4, the first fire pump 10, the second fire pump 11, the first signal valve 13-1, the second signal valve 13-3, the electromagnetic valve 13-5, the fire detector 18, the first pressure maintaining pump 22-1, the second pressure maintaining pump 22-2, the first pressure switch 12, the second pressure switch 22-3 and the third pressure switch 22-4.
Responding to a fire signal of a fire detector 18 in the cooling tower 1, sending a command to the electromagnetic valve 13-5 by the control box 5, blasting the closed spray head 15 by heating and spraying water, and releasing the pressure by the transmission pipe 16; after the deluge valve 13-2 is opened (both ways can open the deluge valve 13-2), the control box 5 sends instructions to the electric valve 4, the first and second fire pumps 10 and 11 in response to the signal of the first pressure switch 12, so that the open sprinkler 15 sprays water at a predetermined pressure.
In one embodiment, an electric valve 4 is arranged on the water outlet pipe 3 at the bottom of the water collecting tray 2 of the cooling tower 1. The control box 5 can open and close the electro valve 4. The control box 5 is connected with a fire-fighting duty room through a control line, and fire-fighting duty personnel can remotely control the automatic water-spraying fire-extinguishing system of the cooling tower. The water outlet pipeline 3 of the cooling tower 1 is connected to the power station. A fire-fighting water inlet 6 is arranged on the side wall of the bottom of a water collecting tray 2 of the cooling tower 1, and an intercepting device 7 is arranged at the fire-fighting water inlet 6. The intercepting device 7 is a cover with an inner layer of grid and an outer layer of grid, the distance between the outer layer of grid is large, large sundries such as branches can be intercepted, the distance between the inner layer of grid is small, small sundries such as leaves can be intercepted, and a certain distance is reserved between the two layers of covers. The upper end of the intercepting device 7 can be hung on the side wall of the water collecting tray 2 and is convenient to take down for cleaning. The fire inlet 6 is connected with a fire inlet pipe 8, and a check valve 9 is arranged on the fire inlet pipe 8 and close to the cooling tower 1. First and second fire pumps 10 and 11 are provided on the check valve 9 connection pipe. The first and second fire pumps 10 and 11 are connected in parallel, one for use and one for standby. The flow rates of the first and second fire pumps 10 and 11 are determined by calculation of the water spraying strength and the acting area of the nozzle, and the head is determined by calculation of the working pressure of the most unfavorable point open nozzle 15 and the head loss of the pipeline. The first and second fire pumps 10 and 11 may employ electric pumps or diesel pumps. The control box 5 and fire attendant staff can control the opening and closing of the first and second fire pumps 10 and 11. A first pressure switch 12 is arranged on the pipeline after the outlets of the first fire pump 10 and the second fire pump 11 are connected in parallel. The first pressure switch 12 sends a signal to the control box 5, which can turn on the first fire pump 10 and the second fire pump 11 and send an alarm signal to the fire-fighting attendant room. The rain alarm valve group 13 is arranged on a vertical pipeline connected with the first pressure switch 12, and is specifically arranged as follows: the pipeline is sequentially provided with a first signal valve 13-1, a deluge valve 13-2 and a second signal valve 13-3. The first signal valve 13-1 and the second signal valve 13-3 are normally open. The first signal valve 13-1 and the second signal valve 13-3 have signals to be transmitted to a fire-fighting duty room, and the duty room staff can see the opening or closing state of the signal valves to prevent the false closing. A branch pipe 13-4 is connected from one side of the lower part of the valve body of the deluge valve 13-2, and the branch pipe 13-4 is connected above the drainage funnel. The branch pipe 13-4 is provided with an electromagnetic valve 13-5. The control box 5 can control the opening and closing of the electromagnetic valves 13-5. A starting pipe 16 is arranged on a branch pipe 13-4 connected between the deluge valve 13-2 and the electromagnetic valve 13-5, and the starting pipe 16 enters the cooling tower 1 from a side plate at the upper part of the tower. A closed spray head 17 is arranged in the tower on the starting pipe 16. The nominal operating temperature of the closed sprinkler 17 is 30 c higher than the maximum ambient temperature. When a fire disaster happens, the closed spray nozzle 17 is heated to explode and spray water, the transmission pipe 16 is decompressed, the pressure in the branch pipe 13-4 is reduced, the pressure relief cavity of the deluge valve 13-2 is decompressed, and the deluge valve 13-2 is opened. A branch pipe 14 connected with the rain alarm valve group 13 enters the cooling tower from a side plate at the upper part of the cooling tower 1, and an open type spray head 15 is arranged on the branch pipe 14. The open type spray head 15 performs spray protection on the filler, the fan motor and the fan deck. A fire detector 18 is arranged above the cooling tower 1 filling and the motor. The fire detector 18 is typically a line type temperature sensitive fire detector. When a fire breaks out, the signal of the fire detector 18 is transmitted to the control box 5, the electromagnetic valve 13-5 is opened by the signal, and an alarm signal is sent to the fire-fighting duty room. After the electromagnetic valve 13-5 is opened, the deluge valve 13-2 is opened.
A water tank 19 is arranged on one side of the cooling tower 1, and a bracket is arranged below the water tank 19. The water level of the water tank 19 cannot be lower than the water level of the water collection tray 2 so as not to overflow the water in the water collection tray 2 from the water tank 19. The water storage capacity of the water tank 19 is such that the fire fighting system can operate normally when there is no water in the water collection tray 2 and the cooling tower packing in the event of a fire. The bottom of the water tank 19 is provided with a water outlet pipe 20, and the water outlet pipe 20 is connected with the fire-fighting water inlet pipe 8. And a connecting pipe 21 connected to the second water outlet pipe 20 and connected to the pipes connected in parallel to the outlets of the first and second fire pumps 10 and 11. The pressure stabilizer 22 is arranged on the connecting pipe 21, and is specifically arranged as follows: a first pressure stabilizing pump 22-1, a second pressure stabilizing pump 22-2, a second pressure switch 22-3, a third pressure switch 22-4 and a pneumatic water tank 22-5 which are connected in parallel are sequentially arranged on the connecting pipe 21,
the first and second pumps 22-1 and 22-2 are used one by one and stand by, work in turn, automatically switch, and operate alternately. The design flow of the pressure stabilizing pump is not less than the normal leakage amount of the system and the automatic starting flow of the system, and the design pressure meets the requirement of the working pressure of the closed spray nozzle 17 at the most unfavorable point. The control box 5 can turn on and off the first and second surge pumps 22-1 and 22-2 based on the values set by the second pressure switch 22-3 and the third pressure switch 22-4. The pneumatic water tank 22-5 is of a diaphragm type and functions to prevent frequent activation of the first and second pumps 22-1 and 22-2. The first and second pressure maintaining pumps 22-1 and 22-2 can maintain a stable pressure in the branch pipe 13-4 from the outlet of the water pump to the lower part of the valve body of the deluge valve 13-2 and the transmission pipe 16.
The most unfavorable point is that the working pressure of the open type spray head is 0.1-0.3MPa, and the water spraying strength is 10-30L/min m 2. The planar arrangement of the spray heads should ensure the required water spray intensity per unit area in the fire extinguishing area and should ensure that the fire water with certain intensity is uniformly sprayed onto the whole protected area. The effective area of an individual cooling tower is calculated according to the area of 1 cooling tower, and the effective area of a plurality of cooling towers assembled and combined is calculated according to the area of at least 2 cooling towers, wherein the other cooling towers are often ignited by the combustion of one tower in the case of fire. The continuous water spraying time of the automatic water spraying fire extinguishing system of the cooling tower is 0.5-3 h.
The working pressure of the most unfavorable closed nozzle is 0.1 MPa.
In one embodiment, the electric valve 4 on the outlet pipe 3 is opened when the cooling tower 1 is in operation. Hot water enters from a water inlet pipeline of the cooling tower 1, and flows out from a water outlet pipeline 3 to the power station after heat exchange.
A certain amount of water is filled in the pneumatic water tank 22-5, and the operating conditions of the first pressure stabilizing pump 22-1 and the second pressure stabilizing pump 22-2 are controlled by using the set operating pressure of the pneumatic water tank 22-5, so that the functions of pressure increasing and pressure stabilizing are achieved. When the condition of leakage and the like occurs in the pipeline system at ordinary times, the pressure in the pipeline can be reduced, when the pressure set by the second pressure switch 22-3 is reached, the second pressure switch 22-3 sends a signal to the control box 5, the signal starts the first or second pressure stabilizing pump 22-1 or 22-2 to start water supplementing and pressure stabilizing, and when the pressure value set by the third pressure switch 22-4 is reached, the signal stops the first or second pressure stabilizing pump 22-1 or 22-2. The first or second pressure maintaining pump 22-1 or 22-2 is repeatedly started.
When the cooling tower 1 is overhauled, the electric valves 4 of the water inlet pipeline valve and the water outlet pipeline 3 of the cooling tower 1 are closed. Due to the maintenance, there may be no water in the water collection tray 2, and the check valve 9 is arranged in the first outlet conduit 8, so that water in the water tank 19 cannot enter the water collection tray 2.
The deluge valve 13-2 is normally closed. When the fire detector 18 detects that a fire occurs in the cooling tower 1, a signal is transmitted to the control box 5, the electromagnetic valve 13-5 is opened by the signal, water is discharged to the drainage funnel under the action of pressure, meanwhile, the closed spray head 17 is heated to explode and spray water, the transmission pipe 16 is decompressed, the pressure in the branch pipe 13-4 is reduced, the pressure in the pressure release cavity in the valve body of the deluge valve 13-2 is released, and the deluge valve 13-2 is opened. The pressure in the pipeline at the outlet of the first or second fire pump 10 or 11 is rapidly reduced, and when the pressure is reduced to the value set by the first pressure switch 12, a signal is sent to the control box 5, the signal turns off the first or second pressure maintaining pump 22-1 or 22-2, and the first or second fire pump 10 or 11 is started.
The first or the second fire pump 10 or 11 absorbs water from the water tank 19 and/or the water collecting tray 2 of the cooling tower 1, the pressurized water is sprayed out from the open type spray head 15 through the rain alarm valve group 13 to extinguish fire, and the water falls into the water collecting tray 2 of the cooling tower. The fire-fighting water is recycled in the system, and no external water source is needed.
After the fire is extinguished, the fire attendant remotely or onsite turns off the first or second fire pump 10 or 11.
The fire extinguishing method based on the automatic water spraying fire extinguishing system for the cooling tower comprises the following steps:
step S1: the fire detector 14 in the cooling tower 1 detects the fire, the fire signal is transmitted to the control box 5, the electromagnetic valve 11-5 is opened by the signal, the closed nozzle 17 is heated, blasted and sprays water, the transmission pipe 16 releases pressure,
step S2: the pressure relief cavity of the valve body of the deluge valve 13-2 is decompressed, the deluge valve 13-2 is opened,
step S3: the first pressure switch 12 sends a signal to the control box 5,
step S4: responding to a fire signal, the control box sends an instruction, closes the electric valve, the first pressure stabilizing pump and the second pressure stabilizing pump, and starts the first fire pump or the second fire pump; the first or the second fire pump absorbs water from the water tank and/or the water collecting tray of the cooling tower, sprays out from the open type spray head through the branch pipe and falls into the water collecting tray of the cooling tower,
step S5: after the fire is extinguished, the first or second fire pump 10 or 11 is turned off remotely or on site.
In one embodiment, when the pressure in the outlet pipeline of the pressure stabilizing pump reaches a second preset pressure value, the second pressure switch sends a signal to the control box, the signal starts the pressure stabilizing pump to increase the pressure in the pipeline behind the pressure stabilizing pump, and when the pressure reaches a third preset pressure value, the third pressure switch sends a signal to the control box, and the signal turns off the pressure stabilizing pump. The design flow of the pressure stabilizing pump is not less than the normal leakage amount of the system and the automatic starting flow of the system, and the design pressure meets the requirement of the working pressure of the closed nozzle at the most unfavorable point.
Finally, it should be noted that: the embodiments described are only a part of the embodiments of the present application, and not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments in the present application belong to the protection scope of the present application.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (12)
1. A cooling tower automatic sprinkler system, characterized in that it includes:
the cooling tower comprises a water collecting tray, the water collecting tray is provided with a first water outlet pipeline connected with the power station and a fire-fighting water inlet connected with a fire-fighting water inlet pipeline,
the interception device is arranged on the side wall of the fire-fighting water inlet,
an electric valve arranged on the first water outlet pipeline to switch on and off the first water outlet pipeline,
a check valve disposed in the fire-fighting water intake pipe,
first and second fire pumps arranged in parallel on the fire inlet pipe,
a first pressure switch arranged on the pipeline after the outlets of the first and second fire fighting pumps are connected in parallel,
the deluge alarm valve group, it is set up in said first and second fire pump outlet pipeline after connecting in parallel, it includes the first signal valve, deluge valve, second signal valve connected sequentially on the vertical pipeline; the lower part of the valve body of the deluge valve is connected with a branch pipe which is provided with an electromagnetic valve,
a branch pipe which is connected with the rain alarm valve group and is connected with the cooling tower,
an open type spray head which is arranged in the cooling tower and is connected with the branch pipe,
a transmission pipe which is connected with the lower part connecting branch pipe of the valve body of the deluge valve and is connected with the cooling tower,
a closed spray head arranged in the cooling tower and connected with the transmission pipe,
a fire detector disposed within the cooling tower to generate a fire signal,
the bottom of the water tank is provided with a second water outlet pipeline connected with the fire-fighting water inlet pipeline,
a connecting pipe which is connected with the second water outlet pipeline and is connected with the pipelines after the outlets of the first and second fire fighting pumps are connected in parallel,
the pressure stabilizing device is arranged on the connecting pipe and comprises a first pressure stabilizing pump, a second pressure switch, a third pressure switch and a pneumatic water tank which are sequentially arranged on the connecting pipe in parallel,
and the control box is connected with the electric valve, the first fire pump, the second fire pump, the first signal valve, the second signal valve, the electromagnetic valve, the fire detector, the first pressure stabilizing pump, the second pressure stabilizing pump, the first pressure switch, the second pressure switch and the third pressure switch.
2. The automatic sprinkler system of claim 1,
in the automatic water spraying fire extinguishing system for the cooling tower, the control box sends an instruction to the electromagnetic valve in response to a fire signal of a fire detector in the cooling tower, the closed spray head is heated to explode and spray water, the transmission pipe is decompressed, the deluge valve is opened, and the control box sends an instruction to the electric valve, the first fire pump and the second fire pump in response to a signal of the first pressure switch, so that the open spray head sprays water at a preset pressure.
3. The automatic sprinkler system of claim 1,
the intercepting device is detachable and connected with the side wall of the water collecting tray of the cooling tower.
4. The automatic sprinkler system of claim 3,
the intercepting device comprises covers with inner and outer layers of grids, the distance between the outer layer grids is larger than that between the inner layer grids, and the two covers are arranged at intervals.
5. The automatic sprinkler system of claim 1,
the flow rates of the first and second fire pumps are related to the water spraying intensity and the acting area of the open type spray head, and the lift of the first and second fire pumps is related to the working pressure of the open type spray head at the worst point and the head loss of a pipeline.
6. The automatic sprinkler system of claim 5,
the operating pressure of the open type spray head at the worst point is 0.1-0.3 MPa.
7. The automatic sprinkler system of claim 1,
the water spraying strength of the open type spray head is 10-30L/min m 2.
8. The automatic sprinkler system of claim 1,
the working pressure of the most unfavorable point closed spray head is 0.1 MPa.
9. The automatic sprinkler system of claim 1,
the continuous water spraying time of the fire extinguishing system is 0.5-3 h.
10. The automatic sprinkler system of claim 1,
the water tank stores the fire-fighting water consumption for ensuring the normal operation of the system.
11. The fire extinguishing method of the automatic sprinkler system of the cooling tower according to any one of claims 1 to 10, characterized in that it comprises the steps of,
step S1: when a fire detector in the cooling tower detects the occurrence of a fire, a fire signal is transmitted to the control box, the electromagnetic valve is opened by the signal, the closed spray head is heated and exploded to spray water, the transmission pipe is decompressed,
step S2: the pressure relief cavity of the valve body of the deluge valve is decompressed, the deluge valve is opened,
step S3: the first pressure switch sends a signal to the control box,
step S4: responding to a fire signal, the control box sends an instruction, closes the electric valve, the first pressure stabilizing pump and the second pressure stabilizing pump, and starts the first fire pump or the second fire pump; the first or the second fire pump absorbs water from the water tank and/or the water collecting tray of the cooling tower, sprays out from the open type spray head through the branch pipe and falls into the water collecting tray of the cooling tower,
step S5: after the fire is extinguished, the first fire pump or the second fire pump is shut down remotely or on site.
12. A method of extinguishing a fire according to claim 11, wherein the second pressure switch sends a signal to the control box when the pressure in the surge pump outlet conduit reaches a second predetermined pressure value, the signal activating the surge pump to increase the pressure in the conduit behind the surge pump, and when the pressure reaches a third predetermined pressure value, the third pressure switch sends a signal to the control box, the signal deactivating the surge pump.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102514391B1 (en) * | 2022-06-08 | 2023-03-27 | 박창현 | Fuel cell integrated cooling tower system with firefighting function |
| CN116370873A (en) * | 2023-06-01 | 2023-07-04 | 常州华立阀门控制设备有限公司 | Intelligent electric valve actuator with controllable flow |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB180846A (en) * | 1921-04-14 | 1922-06-08 | William Hughes | Improvements in fire extinguishing and fumigating plants |
| CN203315621U (en) * | 2013-05-15 | 2013-12-04 | 大唐三门峡发电有限责任公司 | Firefighting system |
| CN204034114U (en) * | 2014-06-24 | 2014-12-24 | 福建省晋江市长成发新树脂有限公司 | The pipe-line system that novel cooling fire-fighting combines |
| CN205935060U (en) * | 2016-08-15 | 2017-02-08 | 邓秋萍 | Fire control voltage regulator device |
| CN210873866U (en) * | 2019-10-09 | 2020-06-30 | 宁波正源电力有限公司 | Fire water system combined with generator set cooling tower |
| CN211974513U (en) * | 2020-01-03 | 2020-11-20 | 上海同泰火安科技有限公司 | Foam spraying container pump room |
| CN212673885U (en) * | 2020-06-18 | 2021-03-09 | 酷仑冷却技术（上海）有限公司 | Cooling tower with fire-fighting spraying equipment |
| CN113390137A (en) * | 2020-03-11 | 2021-09-14 | 上海申能新动力储能研发有限公司 | Air-conditioning fire-fighting system |
| CN214743410U (en) * | 2021-04-13 | 2021-11-16 | 狮可立消防装备技术(深圳)有限公司 | Fusing deluge valve |
| CN215309833U (en) * | 2021-06-22 | 2021-12-28 | 张祎达 | Novel pneumatic fire control in oil field drenches equipment |
| CN216925208U (en) * | 2022-01-11 | 2022-07-08 | 世源科技工程有限公司 | Automatic water spraying fire extinguishing system of cooling tower |
-
2022
- 2022-01-11 CN CN202210027479.2A patent/CN114432631B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB180846A (en) * | 1921-04-14 | 1922-06-08 | William Hughes | Improvements in fire extinguishing and fumigating plants |
| CN203315621U (en) * | 2013-05-15 | 2013-12-04 | 大唐三门峡发电有限责任公司 | Firefighting system |
| CN204034114U (en) * | 2014-06-24 | 2014-12-24 | 福建省晋江市长成发新树脂有限公司 | The pipe-line system that novel cooling fire-fighting combines |
| CN205935060U (en) * | 2016-08-15 | 2017-02-08 | 邓秋萍 | Fire control voltage regulator device |
| CN210873866U (en) * | 2019-10-09 | 2020-06-30 | 宁波正源电力有限公司 | Fire water system combined with generator set cooling tower |
| CN211974513U (en) * | 2020-01-03 | 2020-11-20 | 上海同泰火安科技有限公司 | Foam spraying container pump room |
| CN113390137A (en) * | 2020-03-11 | 2021-09-14 | 上海申能新动力储能研发有限公司 | Air-conditioning fire-fighting system |
| CN212673885U (en) * | 2020-06-18 | 2021-03-09 | 酷仑冷却技术（上海）有限公司 | Cooling tower with fire-fighting spraying equipment |
| CN214743410U (en) * | 2021-04-13 | 2021-11-16 | 狮可立消防装备技术(深圳)有限公司 | Fusing deluge valve |
| CN215309833U (en) * | 2021-06-22 | 2021-12-28 | 张祎达 | Novel pneumatic fire control in oil field drenches equipment |
| CN216925208U (en) * | 2022-01-11 | 2022-07-08 | 世源科技工程有限公司 | Automatic water spraying fire extinguishing system of cooling tower |
Non-Patent Citations (1)
| Title |
|---|
| 程远平等: "《水灭火工程》", 31 December 2011, 中国矿业大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102514391B1 (en) * | 2022-06-08 | 2023-03-27 | 박창현 | Fuel cell integrated cooling tower system with firefighting function |
| CN116370873A (en) * | 2023-06-01 | 2023-07-04 | 常州华立阀门控制设备有限公司 | Intelligent electric valve actuator with controllable flow |
| CN116370873B (en) * | 2023-06-01 | 2023-09-12 | 常州华立阀门控制设备有限公司 | Intelligent electric valve actuator with controllable flow |
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