CN216925208U - Automatic water spraying fire extinguishing system of cooling tower - Google Patents
Automatic water spraying fire extinguishing system of cooling tower Download PDFInfo
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- CN216925208U CN216925208U CN202220064522.8U CN202220064522U CN216925208U CN 216925208 U CN216925208 U CN 216925208U CN 202220064522 U CN202220064522 U CN 202220064522U CN 216925208 U CN216925208 U CN 216925208U
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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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The utility model discloses an automatic water spraying fire extinguishing system for a cooling tower. In response to a fire signal, the control box sends an instruction to the electromagnetic valve, the closed type spray head is heated to explode and spray water, the deluge valve is opened, and in response to a first pressure switch fire signal, the control box sends an instruction to the electric valve, the first fire pump, the second fire pump, the first pressure stabilizing pump and the second pressure stabilizing pump, so that the open type spray head sprays 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 utility model relates to the technical field of cooling tower fire prevention, in particular to an automatic water spraying fire extinguishing system of a cooling tower.
Background
The mechanical ventilation cooling tower is a heat exchange hot standby widely applied in civil and industrial fields. The cooling tower runs for a long time, the motor runs too hot, 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 spreads rapidly, is difficult to extinguish in the first time, and can cause great threat to life and production safety.
The current building design fire-proof standard in China does not require a cooling tower to be provided with a special, quick 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 of 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 utility model 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.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an automatic water spraying fire extinguishing system for a cooling tower, which is suitable for new construction and reconstruction projects, has high construction flexibility, smaller volume of a fire-fighting water tank, cyclic utilization of fire-fighting water energy, low investment reconstruction and operation and maintenance cost and is a special cooling tower automatic water spraying fire extinguishing system which is independently arranged.
In order to achieve the above purpose, the utility model 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,
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.
In the automatic water spraying fire extinguishing system for the cooling tower, an intercepting device for intercepting sundries is arranged at a fire inlet and comprises covers of an inner layer of grid and an outer layer of grid, the interval between the outer layer of grid and the inner layer of grid is larger than that between the inner layer of grid, 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 at the worst point 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 of the cooling tower, the water spraying intensity of the open type spray head is 10-30L/min m2。
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 continuous water spraying time of the fire extinguishing system is 0.5-3 h.
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.
In the technical scheme, the automatic water spraying fire extinguishing system for the cooling tower provided by the utility model 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 cooling towers that have already been put into operation, only a small amount of equipment and piping has to be added. The utility model 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 utility model 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 utility model, as claimed, but is merely representative of selected embodiments of the utility model. 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.
In response to a fire signal of a fire detector 18 in the cooling tower 1, the control box 5 sends an instruction to the electromagnetic valve 13-5, meanwhile, the closed spray head 15 is heated to explode and spray water, the transmission pipe 16 releases the pressure, after the deluge valve 13-2 is opened (the deluge valve 13-2 can be opened in two modes), in response to a signal of the first pressure switch 12, the control box 5 sends an instruction to the electric valve 4, the first fire pump 10 and the second fire pump 11, and the open spray head 15 sprays water at a preset 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. An electromagnetic valve 13-5 is arranged on the branch pipe 13-4. 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 occurs, the closed spray head 17 is heated to explode and spray water, the transmission pipe 16 releases pressure, the pressure in the branch pipe 13-4 is reduced, the pressure release cavity of the deluge valve 13-2 releases pressure, 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 a fire-fighting duty room.
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 to prevent the water in the water collection tray 2 from overflowing 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 pumps 22-1 and 22-2 in accordance with 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 stabilizing pumps 22-1 and 22-2 can maintain the 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 duct 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 second fire pump 10 or 11 sucks water from the water collecting tray 2 and/or the water tank 19 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 an external water supply is not needed.
After the fire is extinguished, the fire attendant remotely or onsite turns off the first or second fire pump 10 or 11.
Finally, it should be noted that: the embodiments described are only a few embodiments of the present application, not all embodiments, and all other embodiments that can be obtained by one skilled in the art without making any inventive effort based on the embodiments in the present application are intended to be covered by 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 utility model. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the utility model.
Claims (8)
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,
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 which is arranged in the cooling tower and is 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,
the fire-fighting water inlet is provided with an intercepting device for intercepting sundries, the intercepting device comprises covers of an inner layer of grid and an outer layer of grid, the interval between the outer layer of grid is larger than that between the inner layer of grid, and the two covers are arranged at intervals.
3. 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.
4. The automatic sprinkler system of claim 3,
the operating pressure of the open type spray head at the worst point is 0.1-0.3 MPa.
5. The automatic sprinkler system of claim 1,
the water spraying strength of the open type spray head is 10-30L/min.m2。
6. The automatic sprinkler system of claim 1,
the working pressure of the most unfavorable point closed spray head is 0.1 MPa.
7. The automatic sprinkler system of claim 1,
the continuous water spraying time of the fire extinguishing system is 0.5-3 h.
8. The automatic sprinkler system of claim 1,
the water tank stores the fire-fighting water consumption for ensuring the normal operation of the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202220064522.8U CN216925208U (en) | 2022-01-11 | 2022-01-11 | Automatic water spraying fire extinguishing system of cooling tower |
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| CN202220064522.8U CN216925208U (en) | 2022-01-11 | 2022-01-11 | Automatic water spraying fire extinguishing system of cooling tower |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114432631A (en) * | 2022-01-11 | 2022-05-06 | 世源科技工程有限公司 | Automatic water spraying fire extinguishing system and fire extinguishing method for cooling tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114432631A (en) * | 2022-01-11 | 2022-05-06 | 世源科技工程有限公司 | Automatic water spraying fire extinguishing system and fire extinguishing method for cooling tower |
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